Accommodation, Ocular: The dioptric adjustment of the EYE (to attain maximal sharpness of retinal imagery for an object of regard) referring to the ability, to the mechanism, or to the process. Ocular accommodation is the effecting of refractive changes by changes in the shape of the CRYSTALLINE LENS. Loosely, it refers to ocular adjustments for VISION, OCULAR at various distances. (Cline et al., Dictionary of Visual Science, 4th ed)Odonata: An order of insects comprising three suborders: Anisoptera, Zygoptera, and Anisozygoptera. They consist of dragonflies and damselflies.Oculomotor Nerve: The 3d cranial nerve. The oculomotor nerve sends motor fibers to the levator muscles of the eyelid and to the superior rectus, inferior rectus, and inferior oblique muscles of the eye. It also sends parasympathetic efferents (via the ciliary ganglion) to the muscles controlling pupillary constriction and accommodation. The motor fibers originate in the oculomotor nuclei of the midbrain.Visual Cortex: Area of the OCCIPITAL LOBE concerned with the processing of visual information relayed via VISUAL PATHWAYS.Trochlear Nerve: The 4th cranial nerve. The trochlear nerve carries the motor innervation of the superior oblique muscles of the eye.Presbyopia: The normal decreasing elasticity of the crystalline lens that leads to loss of accommodation.Visual Pathways: Set of cell bodies and nerve fibers conducting impulses from the eyes to the cerebral cortex. It includes the RETINA; OPTIC NERVE; optic tract; and geniculocalcarine tract.Motor Neurons: Neurons which activate MUSCLE CELLS.Visual Perception: The selecting and organizing of visual stimuli based on the individual's past experience.Refraction, Ocular: Refraction of LIGHT effected by the media of the EYE.Accommodation, Ocular: The dioptric adjustment of the EYE (to attain maximal sharpness of retinal imagery for an object of regard) referring to the ability, to the mechanism, or to the process. Ocular accommodation is the effecting of refractive changes by changes in the shape of the CRYSTALLINE LENS. Loosely, it refers to ocular adjustments for VISION, OCULAR at various distances. (Cline et al., Dictionary of Visual Science, 4th ed)Lens, Crystalline: A transparent, biconvex structure of the EYE, enclosed in a capsule and situated behind the IRIS and in front of the vitreous humor (VITREOUS BODY). It is slightly overlapped at its margin by the ciliary processes. Adaptation by the CILIARY BODY is crucial for OCULAR ACCOMMODATION.Refraction, Ocular: Refraction of LIGHT effected by the media of the EYE.Anterior Chamber: The space in the eye, filled with aqueous humor, bounded anteriorly by the cornea and a small portion of the sclera and posteriorly by a small portion of the ciliary body, the iris, and that part of the crystalline lens which presents through the pupil. (Cline et al., Dictionary of Visual Science, 4th ed, p109)Myopia: A refractive error in which rays of light entering the EYE parallel to the optic axis are brought to a focus in front of the RETINA when accommodation (ACCOMMODATION, OCULAR) is relaxed. This results from an overly curved CORNEA or from the eyeball being too long from front to back. It is also called nearsightedness.Eye: The organ of sight constituting a pair of globular organs made up of a three-layered roughly spherical structure specialized for receiving and responding to light.Presbyopia: The normal decreasing elasticity of the crystalline lens that leads to loss of accommodation.Papio hamadryas: A species of baboon in the family CERCOPITHECIDAE, which has a well-studied trilevel social structure consisting of troops, bands, and clans.Refractive Errors: Deviations from the average or standard indices of refraction of the eye through its dioptric or refractive apparatus.Cornea: The transparent anterior portion of the fibrous coat of the eye consisting of five layers: stratified squamous CORNEAL EPITHELIUM; BOWMAN MEMBRANE; CORNEAL STROMA; DESCEMET MEMBRANE; and mesenchymal CORNEAL ENDOTHELIUM. It serves as the first refracting medium of the eye. It is structurally continuous with the SCLERA, avascular, receiving its nourishment by permeation through spaces between the lamellae, and is innervated by the ophthalmic division of the TRIGEMINAL NERVE via the ciliary nerves and those of the surrounding conjunctiva which together form plexuses. (Cline et al., Dictionary of Visual Science, 4th ed)Dictionaries, MedicalAccommodation, Ocular: The dioptric adjustment of the EYE (to attain maximal sharpness of retinal imagery for an object of regard) referring to the ability, to the mechanism, or to the process. Ocular accommodation is the effecting of refractive changes by changes in the shape of the CRYSTALLINE LENS. Loosely, it refers to ocular adjustments for VISION, OCULAR at various distances. (Cline et al., Dictionary of Visual Science, 4th ed)Dictionaries as Topic: Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.Presbyopia: The normal decreasing elasticity of the crystalline lens that leads to loss of accommodation.Dictionaries, ChemicalConvergence, Ocular: The turning inward of the lines of sight toward each other.Refraction, Ocular: Refraction of LIGHT effected by the media of the EYE.Terminology as Topic: The terms, expressions, designations, or symbols used in a particular science, discipline, or specialized subject area.Nuclear Physics: The study of the characteristics, behavior, and internal structures of the atomic nucleus and its interactions with other nuclei. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Physics: The study of those aspects of energy and matter in terms of elementary principles and laws. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Health Physics: The science concerned with problems of radiation protection relevant to reducing or preventing radiation exposure, and the effects of ionizing radiation on humans and their environment.Encyclopedias as Topic: Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)Manuscripts, MedicalRadiometry: The measurement of radiation by photography, as in x-ray film and film badge, by Geiger-Mueller tube, and by SCINTILLATION COUNTING.Ytterbium: Ytterbium. An element of the rare earth family of metals. It has the atomic symbol Yb, atomic number 70, and atomic weight 173. Ytterbium has been used in lasers and as a portable x-ray source.Research Report: Detailed account or statement or formal record of data resulting from empirical inquiry.Radiation Oncology: A subspecialty of medical oncology and radiology concerned with the radiotherapy of cancer.Physical Phenomena: The entities of matter and energy, and the processes, principles, properties, and relationships describing their nature and interactions.Research Support as Topic: Financial support of research activities.Research: Critical and exhaustive investigation or experimentation, having for its aim the discovery of new facts and their correct interpretation, the revision of accepted conclusions, theories, or laws in the light of newly discovered facts, or the practical application of such new or revised conclusions, theories, or laws. (Webster, 3d ed)Financing, Organized: All organized methods of funding.Biomedical Research: Research that involves the application of the natural sciences, especially biology and physiology, to medicine.Research Personnel: Those individuals engaged in research.Training Support: Financial support for training including both student stipends and loans and training grants to institutions.National Institutes of Health (U.S.): An operating division of the US Department of Health and Human Services. It is concerned with the overall planning, promoting, and administering of programs pertaining to health and medical research. Until 1995, it was an agency of the United States PUBLIC HEALTH SERVICE.Health Services Research: The integration of epidemiologic, sociological, economic, and other analytic sciences in the study of health services. Health services research is usually concerned with relationships between need, demand, supply, use, and outcome of health services. The aim of the research is evaluation, particularly in terms of structure, process, output, and outcome. (From Last, Dictionary of Epidemiology, 2d ed)Algorithms: A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.Publications: Copies of a work or document distributed to the public by sale, rental, lease, or lending. (From ALA Glossary of Library and Information Science, 1983, p181)Accommodation, Ocular: The dioptric adjustment of the EYE (to attain maximal sharpness of retinal imagery for an object of regard) referring to the ability, to the mechanism, or to the process. Ocular accommodation is the effecting of refractive changes by changes in the shape of the CRYSTALLINE LENS. Loosely, it refers to ocular adjustments for VISION, OCULAR at various distances. (Cline et al., Dictionary of Visual Science, 4th ed)United States Department of Homeland Security: A cabinet department in the Executive Branch of the United States Government concerned with administering those agencies and offices having programs pertaining to domestic national security.Motion Sickness: Disorder caused by motion, as sea sickness, train sickness, car sickness, air sickness, or SPACE MOTION SICKNESS. It may include nausea, vomiting and dizziness.Congresses as Topic: Conferences, conventions or formal meetings usually attended by delegates representing a special field of interest.Civil Defense: Preventive emergency measures and programs designed to protect the individual or community in times of hostile attack.Cues: Signals for an action; that specific portion of a perceptual field or pattern of stimuli to which a subject has learned to respond.Pharmacopoeias as Topic: Authoritative treatises on drugs and preparations, their description, formulation, analytic composition, physical constants, main chemical properties used in identification, standards for strength, purity, and dosage, chemical tests for determining identity and purity, etc. They are usually published under governmental jurisdiction (e.g., USP, the United States Pharmacopoeia; BP, British Pharmacopoeia; P. Helv., the Swiss Pharmacopoeia). They differ from FORMULARIES in that they are far more complete: formularies tend to be mere listings of formulas and prescriptions.Automobile Driving: The effect of environmental or physiological factors on the driver and driving ability. Included are driving fatigue, and the effect of drugs, disease, and physical disabilities on driving.International Cooperation: The interaction of persons or groups of persons representing various nations in the pursuit of a common goal or interest.United States Food and Drug Administration: An agency of the PUBLIC HEALTH SERVICE concerned with the overall planning, promoting, and administering of programs pertaining to maintaining standards of quality of foods, drugs, therapeutic devices, etc.Treatment Outcome: Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.Clonidine: An imidazoline sympatholytic agent that stimulates ALPHA-2 ADRENERGIC RECEPTORS and central IMIDAZOLINE RECEPTORS. It is commonly used in the management of HYPERTENSION.Health Personnel: Men and women working in the provision of health services, whether as individual practitioners or employees of health institutions and programs, whether or not professionally trained, and whether or not subject to public regulation. (From A Discursive Dictionary of Health Care, 1976)Consumer Satisfaction: Customer satisfaction or dissatisfaction with a benefit or service received.Attitude of Health Personnel: Attitudes of personnel toward their patients, other professionals, toward the medical care system, etc.Adrenergic alpha-Agonists: Drugs that selectively bind to and activate alpha adrenergic receptors.Questionnaires: Predetermined sets of questions used to collect data - clinical data, social status, occupational group, etc. The term is often applied to a self-completed survey instrument.Nurses, Community Health: Nurses whose work combines elements of both primary care nursing and public health practice and takes place primarily outside the therapeutic institution. Primary nursing care is directed to individuals, families, or groups in their natural settings within communities.Drug-Related Side Effects and Adverse Reactions: Disorders that result from the intended use of PHARMACEUTICAL PREPARATIONS. Included in this heading are a broad variety of chemically-induced adverse conditions due to toxicity, DRUG INTERACTIONS, and metabolic effects of pharmaceuticals.Family Nurse Practitioners: Registered nurses with graduate degrees in nursing who provide care to patients of all age levels, and who focus their efforts on the health care needs of the entire family.Tablets: Solid dosage forms, of varying weight, size, and shape, which may be molded or compressed, and which contain a medicinal substance in pure or diluted form. (Dorland, 28th ed)Hyperthyroidism: Hypersecretion of THYROID HORMONES from the THYROID GLAND. Elevated levels of thyroid hormones increase BASAL METABOLIC RATE.Specialization: An occupation limited in scope to a subsection of a broader field.Internal Medicine: A medical specialty concerned with the diagnosis and treatment of diseases of the internal organ systems of adults.Tablets, Enteric-Coated: Tablets coated with material that delays release of the medication until after they leave the stomach. (Dorland, 28th ed)Antithyroid Agents: Agents that are used to treat hyperthyroidism by reducing the excessive production of thyroid hormones.Chemistry, Pharmaceutical: Chemistry dealing with the composition and preparation of agents having PHARMACOLOGIC ACTIONS or diagnostic use.Graves Disease: A common form of hyperthyroidism with a diffuse hyperplastic GOITER. It is an autoimmune disorder that produces antibodies against the THYROID STIMULATING HORMONE RECEPTOR. These autoantibodies activate the TSH receptor, thereby stimulating the THYROID GLAND and hypersecretion of THYROID HORMONES. These autoantibodies can also affect the eyes (GRAVES OPHTHALMOPATHY) and the skin (Graves dermopathy).Excipients: Usually inert substances added to a prescription in order to provide suitable consistency to the dosage form. These include binders, matrix, base or diluent in pills, tablets, creams, salves, etc.Child Welfare: Organized efforts by communities or organizations to improve the health and well-being of the child.Scopolamine Hydrobromide: An alkaloid from SOLANACEAE, especially DATURA and SCOPOLIA. Scopolamine and its quaternary derivatives act as antimuscarinics like ATROPINE, but may have more central nervous system effects. Among the many uses are as an anesthetic premedication, in URINARY INCONTINENCE, in MOTION SICKNESS, as an antispasmodic, and as a mydriatic and cycloplegic.Administration, Cutaneous: The application of suitable drug dosage forms to the skin for either local or systemic effects.Motion Sickness: Disorder caused by motion, as sea sickness, train sickness, car sickness, air sickness, or SPACE MOTION SICKNESS. It may include nausea, vomiting and dizziness.Skin Absorption: Uptake of substances through the SKIN.Transdermal Patch: A medicated adhesive patch placed on the skin to deliver a specific dose of medication into the bloodstream.Doxazosin: A prazosin-related compound that is a selective alpha-1-adrenergic blocker.Space Motion Sickness: Disorder characterized by nausea, vomiting, and dizziness, possibly in response to vestibular disorientation or fluid shifts associated with space flight. (From Webster's New World Dictionary)Muscarinic Antagonists: Drugs that bind to but do not activate MUSCARINIC RECEPTORS, thereby blocking the actions of endogenous ACETYLCHOLINE or exogenous agonists. Muscarinic antagonists have widespread effects including actions on the iris and ciliary muscle of the eye, the heart and blood vessels, secretions of the respiratory tract, GI system, and salivary glands, GI motility, urinary bladder tone, and the central nervous system.Motion: Physical motion, i.e., a change in position of a body or subject as a result of an external force. It is distinguished from MOVEMENT, a process resulting from biological activity.Motion Perception: The real or apparent movement of objects through the visual field.

Latrunculin-A causes mydriasis and cycloplegia in the cynomolgus monkey. (1/610)

PURPOSE: To determine the effect of latrunculin (LAT)-A, which binds to G-actin and disassembles actin filaments, on the pupil, accommodation, and isolated ciliary muscle (CM) contraction in monkeys. METHODS: Pupil diameter (vernier calipers) and refraction (coincidence refractometry) were measured every 15 minutes from 0.75 to 3.5 hours after topical LAT-A 42 microg (approximately 10 microM in the anterior chamber [AC]). Refraction was measured every 5 minutes from 0.5 to 1.5 hours after intracameral injection of 10 microl of 50 microM LAT-A (approximately 5 microM in AC), with intramuscular infusion of 1.5 mg/kg pilocarpine HCl (PILO) during the first 15 minutes of measurements. Pupil diameter was measured at 1 and 2 hours, and refraction was measured every 5 minutes from 1 to 2 hours, after intravitreal injection of 20 microl of 1.25 mM LAT-A (approximately 10 microM in vitreous), with intramuscular infusion of 1.5 mg/kg PILO during the first 15 minutes of measurements (all after topical 2.5% phenylephrine), and contractile response of isolated CM strips, obtained <1 hour postmortem and mounted in a perfusion apparatus, to 10 microM PILO +/- LAT-A was measured at various concentrations. RESULTS: Topical LAT-A of 42 microg dilated the pupil without affecting refraction. Intracameral LAT-A of 5 microM inhibited miotic and accommodative responses to intramuscular PILO. Intravitreal LAT-A of 10 microM had no effect on accommodative or miotic responses to intramuscular PILO. LAT-A dose-dependently relaxed the PILO-contracted CM by up to 50% at 3 microM in both the longitudinal and circular vectors. CONCLUSIONS: In monkeys, LAT-A causes mydriasis and cycloplegia, perhaps related to its known ability to disrupt the actin microfilament network and consequently to affect cell contractility and adhesion. Effects of LAT-A on the iris and CM may have significant physiological and clinical implications.  (+info)

Tonic accommodation, age, and refractive error in children. (2/610)

PURPOSE: An association between tonic accommodation, the resting accommodative position of the eye in the absence of a visually compelling stimulus, and refractive error has been reported in adults and children. In general, myopes have the lowest (or least myopic) levels of tonic accommodation. The purpose in assessing tonic accommodation was to evaluate it as a predictor of onset of myopia. METHODS: Tonic accommodation was measured in children enrolled in the Orinda Longitudinal Study of Myopia using an infrared autorefractor (model R-1; Canon, Lake Success, NY) while children viewed an empty lit field or a dark field with a fixation spot projected in Maxwellian view. Children aged 6 to 15 years were measured from 1991 through 1994 (n = 714, 766, 771, and 790 during the 4 years, successively). Autorefraction provided refractive error and tonic accommodation data, and videophakometry measured crystalline lens curvatures. RESULTS: Comparison of the two methods for measuring tonic accommodation shows a significant effect of age across all years of testing, with the lit empty-field test condition yielding higher levels of tonic accommodation compared with the dark-field test condition in children aged 6 through 11 years. For data collected in 1994, mean (+/-SD) tonic accommodation values for the lit empty-field condition were significantly lower in myopes, intermediate in emmetropes, and highest in hyperopes (1.02 +/- 1.18 D, 1.92 +/- 1.59 D, and 2.25 +/- 1.78 D, respectively; Kruskal-Wallis test, P < 0.001; between-group testing shows each group is different from the other two). Age, refractive error, and Gullstrand lens power were significant terms in a multiple regression model of tonic accommodation (R2 = 0.18 for 1994 data). Lower levels of tonic accommodation for children entering the study in the first or third grades were not associated with an increased risk of the onset of myopia, whether measured in the lit empty-field test condition (relative risk = 0.90; 95% confidence interval = 0.75, 1.08), or the dark-field test condition (relative risk = 0.83; 95% confidence interval = 0.60, 1.14). CONCLUSIONS: This is the first study to document an association between age and tonic accommodation. The known association between tonic accommodation and refractive error was confirmed and it was shown that an ocular component, Gullstrand lens power, also contributed to the tonic accommodation level. There does not seem to be an increased risk of onset of juvenile myopia associated with tonic accommodation.  (+info)

Human dynamic closed-loop accommodation augmented by sympathetic inhibition. (3/610)

PURPOSE: A ciliary alpha-adrenoceptor accommodative effect has been proposed, caused by a small population of alpha1-inhibitory receptors in excised human ciliary muscle. This study was intended to investigate the effect on the closed-loop dynamic accommodative process of modulating alpha1-adrenoceptor activity by topical instillation of the alpha1-adrenergic agonist, phenylephrine hydrochloride. METHODS: A group of 10 visually normal subjects viewed a photopic (30 candela/m2) high-contrast Maltese cross, which was modulated sinusoidally (0.05-0.6Hz) and stepwise over a 2-D range (2-4 D). Monocular temporal accommodation responses were measured using a continuously recording dynamic tracking infrared optometer under two trial conditions: after instillation of saline control solution and 50 minutes subsequent to the instillation of 0.27 microl 0.4% benoxinate hydrochloride and 0.27 microl 2.5% phenylephrine hydrochloride. Pupil size and accommodative amplitude were measured at 90-second intervals for 50 minutes after drug instillation. All accommodative measurements were recorded through a fixed 4-mm pupil. RESULTS: A significant reduction in accommodative amplitude (11%; P < 0.05) was recorded, whereas pupil size showed a significant increase (33%; P < 0.05). No significant change in step-response dynamics was observed. However, phenylephrine hydrochloride caused a significant increase in accommodative gain in the low and midtemporal frequency ranges compared with the effect of a saline control treatment. No significant variation in phase lag was observed. CONCLUSIONS: For the first time in humans, this study shows that augmentation of the alpha1-inhibitory sympathetic contribution results in increased accommodative gain at low and midtemporal frequencies, which is consistent with findings in animal studies.  (+info)

Age-related changes in human ciliary muscle and lens: a magnetic resonance imaging study. (4/610)

PURPOSE: To use high-resolution magnetic resonance (MR) images of the eye to directly measure the relationship between ciliary muscle contraction and lens response with advancing age. METHODS: A General Electric, 1.5-Tesla MR imager and a custom-designed eye imaging coil were used to collect high-resolution MR images from 25 subjects, 22 through 83 years of age. A nonmagnetic binocular stimulus apparatus was used to induce both relaxed accommodation (0.1 diopter [D]) and strong accommodative effort (8.0 D). Measurements of the ciliary muscle ring diameter (based on the inner apex), lens equatorial diameter, and lens thickness were derived from the MR images. RESULTS: Muscle contraction is present in all subjects and reduces only slightly with advancing age. A decrease in the diameter of the unaccommodated ciliary muscle ring was highly correlated with advancing age. Lens equatorial diameter does not correlate with age for either accommodative state. Although unaccommodated lens thickness (i.e., lens minor axis length) increases with age, the thickness of the lens under accommodative effort is only modestly age-dependent. CONCLUSIONS: Ciliary muscle contractile activity remains active in all subjects. A decrease in the unaccommodated ciliary muscle diameter, along with the previously noted increase in lens thickness (the "lens paradox"), demonstrates the greatest correlation with advancing age. These results support the theory that presbyopia is actually the loss in ability to disaccommodate due to increases in lens thickness, the inward movement of the ciliary ring, or both.  (+info)

Characteristics of accommodation toward apparent depth. (5/610)

This paper deals with characteristics of accommodation evoked by perceived depth sensation and the dynamic relationship between accommodation and vergence, applying newly developed optical measurement apparatuses. A total of five subjects looked at three different two-dimensional stimuli and two different three-dimensional stimuli; namely a real image and a stereoscopic image. With regard to the two-dimensional stimuli, a manifest accommodation without any accompanying vergence was found because of an apparent depth sensation even though the target distance was kept constant. With regard to the three-dimensional stimuli, larger accommodation and clear vergence were evoked because of binocular parallax and a stronger depth sensation. As for the stereoscopic image, a manifest overshoot (the accommodation peaked first and receded considerably) was found while the vergence remained constant. On the other hand, the overshoot of accommodation was smaller when subjects were watching the real image. These results reveal that brain depth perception has a higher effect on accommodation than expected. The relationship of accommodation and vergence toward the stereoscopic image suggests a reason why severe visual fatigue is commonly experienced by many viewers using stereoscopic displays. It has also paved the way for the numerical analysis of the oculomotor triad system.  (+info)

Optics of the developing fish eye: comparisons of Matthiessen's ratio and the focal length of the lens in the black bream Acanthopagrus butcheri (Sparidae, Teleostei). (6/610)

Matthiessen's ratio (distance from centre of lens to retina:lens radius) was measured in developing black bream, Acanthopagrus butcheri (Sparidae, Teleostei). The value decreased over the first 10 days post-hatch from 3.6 to 2.3 along the nasal and from four to 2.6 along temporal axis. Coincidentally, there was a decrease in the focal ratio of the lens (focal length:lens radius). Morphologically, the accommodatory retractor lentis muscle appeared to become functional between 10-12 days post-hatch. The results suggest that a higher focal ratio compensates for the relatively high Matthiessen's ratio brought about by constraints of small eye size during early development. Combined with differences in axial length, this provides a means for larval fish to focus images from different distances prior to the ability to accommodate.  (+info)

The growing eye: an autofocus system that works on very poor images. (7/610)

It is unknown which retinal image features are analyzed to control axial eye growth and refractive development. On the other hand, identification of these features is fundamental for the understanding of visually acquired refractive errors. Cyclopleged chicks were individually kept in the center of a drum with only one viewing distance possible. Defocusing spectacle lenses were used to stimulate the retina with defined defocus of similar magnitude but different sign. If spatial frequency content and contrast were the only cues analyzed by the retina, all chicks should have become myopic. However, compensatory eye growth was still always in the right direction. The most likely cues for emmetropization, spatial frequency content and image contrast, do therefore not correlate with the elongation of the eye. Rather, the sign of defocus was extracted even from very poor images.  (+info)

Mechanics of accommodation of the human eye. (8/610)

The classical Helmholtz theory of accommodation has, over the years, not gone unchallenged and most recently has been opposed by Schachar at al. (1993) (Annals of Ophthalmology, 25 (1) 5-9) who suggest that increasing the zonular tension increases rather than decreases the power of the lens. This view is supported by a numerical analysis of the lens based on a linearised form of the governing equations. We propose in this paper an alternative numerical model in which the geometric non-linear behaviour of the lens is explicitly included. Our results differ from those of Schachar et al. (1993) and are consistent with the classical Helmholtz mechanism.  (+info)

*Laser blended vision

... accommodation (eye)). There is still much controversy amongst experts as to the mechanism of accommodation of the eye, which is ... The analysis of ocular dominance and patient specific interocular suppression and binocular rivalry also allows for ensuring ...

*Trochlear nerve

Dissection showing origins of right ocular muscles, and nerves entering by the superior orbital fissure. Upper part of medulla ... Cortical control of eye movement (saccades, smooth pursuit, accommodation) involves conjugate gaze, not unilateral eye movement ...

*Accommodation (eye)

ISBN 0-7000-1410-1. oph/723 at eMedicine-"Presbyopia: Cause and Treatment" Ocular Accommodation at the US National Library of ... Accommodation decreases to about 1 dioptre at the age of 70 years. The dependency of accommodation amplitude on age is ... insufficiency Ill-sustained accommodation Accommodative infacility Paralysis of accommodation Spasm of accommodation ... Amplitude of accommodation Cycloplegia Cyclospasm Edinger-Westphal nucleus Mandelbaum Effect Negative relative accommodation ...

*Accommodation reflex

Accommodation at Georgia State University Ocular Accommodation at the US National Library of Medicine Medical Subject Headings ... The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near ... The reflex, controlled by the parasympathetic nervous system, involves three responses; pupil accommodation, lens accommodation ... Three regions make up the accommodation neural circuit, the afferent limb, the efferent limb and the ocular motor neurons that ...

*List of MeSH codes (G11)

... accommodation, ocular MeSH G11.697.716.154 --- adaptation, ocular MeSH G11.697.716.154.371 --- dark adaptation MeSH G11.697. ... ocular MeSH G11.697.677.330 --- evoked potentials, visual MeSH G11.697.677.340 --- eye color MeSH G11.697.677.360 --- figural ... ocular MeSH G11.697.677.911 --- vision MeSH G11.697.677.911.500 --- phosphenes MeSH G11.697.677.911.700 --- vision, binocular ... vestibulo-ocular MeSH G11.561.730.869 --- startle reaction MeSH G11.561.796.255 --- gravity perception MeSH G11.561.796.263 ...

*Lea test

... and ocular function and accommodation (eye). The first version of the LEA test was developed in 1976 by Finnish pediatric ...

*College of Optometrists in Vision Development

... accommodation, binocular vision, ocular motility). This is in addition to the more widely known acuity testing (the "20/20 ...

*List of reflexes (by organ)

... reflex Pupillary light reflex Vestibulo-ocular reflex Corneal reflex Oculocardiac reflex Ciliospinal reflex Accommodation ...

*Chromostereopsis

... given that ocular optics are not achromatic and red objects require more accommodation to be focused on the retina. This notion ... This induced ocular disparity makes blue rays appear to come from a more distant source than red rays. Chromostereopsis may ... Modern accounts of chromatic aberrations divide ocular chromatic aberrations into two main categories; longitudinal chromatic ... blue rays are refracted more than red rays by the ocular media, their foci not only lie at different levels (chromatic ...

*Eye examination

... refraction Accommodative system Amplitude of accommodation Negative relative accommodation Positive relative accommodation ... Ocular motility should always be tested, especially when patients complain of double vision or physicians suspect neurologic ... Close inspection of the anterior eye structures and ocular adnexa are often done with a slit lamp which is a table mounted ... If there is a small, irregular pupil that constricts poorly to light, but normally to accommodation, this is an Argyll ...

*Ernest Maddox

Accommodation and Convergence of the Eyes (1882) Tests and Studies of the Ocular Muscles (1898) Golden Rules of Refraction ( ...

*Library of Congress Classification:Class R -- Medicine

Eyeglasses RE986-988 Artificial eyes and other prostheses RE991-992 Ocular therapeutics RF110-320 Otology. Diseases of the ear ... RE925-939 Refraction and errors of refraction and accommodation RE939.2-981 Optometry. Opticians. ...

*Mitochondrial optic neuropathies

When the details of the examination and history indicate a familial history of similar ocular or systemic disease, whether or ... Often treatment is relegated to lifestyle alterations and accommodations and supportive measures.[citation needed] Those ... diseases understood as congenital in origin could either be specific to the ocular organ system (LHON, DOA) or syndromic (MELAS ...

*Vision in fishes

Accommodation is the process by which the vertebrate eye adjusts focus on an object as it moves closer or further away. Whereas ... In a similar manner, fish have a vestibulo-ocular reflex which stabilizes visual images on the retina when it moves its tail. ... This is achieved by the vestibulo-ocular reflex, which is a reflex eye movement that stabilises images on the retina by ... Humans have a vestibulo-ocular reflex, which is a reflex eye movement that stabilizes images on the retina during head movement ...

*Pseudomyopia

... or through appropriate ocular exercises. Chan R, Trobe J (2002). "Spasm of accommodation associated with closed head trauma". J ... Organic causes may include systemic or ocular medications, brain stem injury, or active ocular inflammation such as uveitis. ... through eye strain or fatigue of ocular systems. It is common in young adults who have active accommodation, and classically ... "Comparative analysis of the efficacy of some methods of conservative treatment of accommodation spasms and myopia in children ...

*Melanin

Further, the ocular lens yellows with age, providing added protection. However, the lens also becomes more rigid with age, ... losing most of its accommodation - the ability to change shape to focus from far to near - a detriment due probably to protein ... Ocular albinism affects not only eye pigmentation but visual acuity, as well. People with albinism typically test poorly, ... A decreased molecular weight or a decrease in the degree of polymerization of ocular melanin has been proposed to turn the ...

*Tom Cornsweet

Crane, H.D.; Cornsweet, T.N. (1970). "Ocular focus stimulator". Journal of the Optical Society of America. 60: 577. doi:10.1364 ... Cornsweet, T.N.; Crane, H.D. (1973). "Training the visual accommodation system". Vision Research. 13: 713-715. doi:10.1016/0042 ...

*Marius Tscherning

He is probably best known for his theory regarding the mechanism of accommodation, of which he disagreed with the accommodation ... He conducted research of entoptic phenomenon, Purkinje images, the etiology of myopia, and Listing's law of ocular movement. He ... Accommodation, Paris 1909 Octave Doin, ("Hermann von Helmholtz and the Theory of Accommodation") which was critical to ... Furthermore, he stated that during accommodation, while the central part of the anterior surface of the lens is bulged, the ...

*Prism cover test

doi:10.1016/j.ajo.2007.09.012 Campos, E.C., & von Noorden, G.K. (2006). Binocular vision and ocular motility (6th ed.) (p.177) ... it is easy to ensure they are maintaining their accommodation. 2. The examiner then holds the prism bar over the patients ... The "prism cover test" (PCT), is an objective measurement and the gold standard in measuring strabismus, i.e. ocular ... Ansons, A. M., & Davis, H. (2014). Diagnosis and Management of Ocular Motility Disorders (4th ed.). pp. 97. London: Blackwell. ...

*Esotropia

However, where the degree of error is small enough to allow the child to generate clear vision by over-accommodation, but large ... These problems may directly affect the extra-ocular muscles themselves, and may also result from conditions affecting the nerve ... The over-convergence associated with the extra accommodation required to overcome a hyperopic refractive error can precipitate ... However, others will eventually require extra-ocular muscle surgery to resolve their problems. Congenital esotropia, or ...

*Parinaud's syndrome

It has less commonly been associated with spasm of accommodation on attempted upward gaze, pseudoabducens palsy (also known as ... see-saw nystagmus and associated ocular motility deficits including skew deviation, oculomotor nerve palsy, trochlear nerve ...

*Fluorescent lamps and health

". "Accommodation Ideas for Employees with Epilepsy". "Accommodation and Compliance Series: Employees with Lupus". Shadick NA, ... Non-visual effects of ocular light on human beings - Quantities, symbols and action spectra, DIN Deutsches Institut für Normung ...

*Christian Georg Theodor Ruete

Book on eye diseases, therapeutics and ocular surgery. Ein neues Ophthalmotrop, 1857 - A new ophthalmotrope. Das Stereoscop : ... Pagel: Biographical Dictionary excellent doctors of the nineteenth century (biography) [1] On the anomalies of accommodation ...

*Carl von Hess

... (7 March 1863 in Mainz - 28 June 1923 in Possenhofen) was a German ophthalmologist known for his work in ocular ... Die Refraktion und Akkommodation des menschlichen Auges und ihre Anomalien, 1902 - Refraction and accommodation of the human ... He made significant contributions in his studies of refraction and accommodation of the eye. He also conducted research on ...

*Eye care professional

Ocularists specialize in the fabrication and fitting of ocular prostheses for people who have lost eyes due to trauma or ... Optometrist would worry that the ophthalmologist would fail to identify or mistreat the spasm of accommodation. As of 2012, ... They do not directly treat ocular disease with medications or surgery. Orthoptists are trained to treat patients using optical ... For example, consider a patient with glaucoma and spasm of accommodation. Ophthalmologists would be concerned that an ...

*Eye disease

Disorders of accommodation Internal ophthalmoplegia (H53.0) Amblyopia (lazy eye) - poor or blurry vision due to either no ... ocular hypertension (H40.1) Primary open-angle glaucoma (H40.2) Primary angle-closure glaucoma (H40.3) Primary Normal Tension ... the tendency for eyes to look outward H52 Disorders of refraction and accommodation (H52.0) Hypermetropia (Farsightedness) - ... lenses Fungal contamination of contact lenses Lists of diseases List of eye surgeries List of systemic diseases with ocular ...

*Maddox wing

Relaxation of accommodation can result in an increase in exophoria and a decrease in esophoria, leading to an inaccurate result ... Davis, Alec M. Ansons, Helen (2014). Diagnosis and management of ocular motility disorders (Fourth ed.). Chicester: Wiley- ... Davis, Alec M. Ansons, Helen (2014). Diagnosis and management of ocular motility disorders (Fourth ed.). Chicester: Wiley- ...
Definition of ocular accommodation in the Financial Dictionary - by Free online English dictionary and encyclopedia. What is ocular accommodation? Meaning of ocular accommodation as a finance term. What does ocular accommodation mean in finance?
Figure 3 shows contrast sensitivity (the reciprocal of contrast threshold) as a function of defocus levels during dynamic accommodation ( Figure 3, markers) and steady-state accommodation ( Figure 3, dashed lines) for each subject. Using SPSS version 16 we conducted a repeated-measures ANOVA [4 (subject) × 5 (accommodation velocity, including zero velocity (steady-state accommodation)) × 5 (defocus level)]. As expected, the results showed a main effect of defocus level [ F (1.8,40.4) = 199, P , 0.001, Huynh-Feldt correction]. The type of accommodation had also a main effect on contrast sensitivity [ F (2.9,66.7) = 57.3, P , 0.001, Huynh-Feldt correction]. Statistical analysis showed a significant interaction between defocus level and type of accommodation [ F (7.3,168) = 24.3, P , 0.001, Huynh-Feldt correction]. Because the important comparisons were those between contrast sensitivity in steady-state accommodation and those in dynamic accommodation following a 1, 2, 3, 10 D/s target, we ...
Purpose : Binocular vision deficits, although not implicated as a causative factor, have been previously reported in children with dyslexia. However, few studies have evaluated the ocular accommodative profile and symptoms associated with near work in dyslexic children. The purpose of our study was to assess the nature of accommodative deficits in children diagnosed with dyslexia. Methods : A prospective observational study was carried out on 30 dyslexic individuals (mean age: 10.29±1.17 years) and 33 typically reading children (mean age: 9.44±1.38 years). All children had a complete cycloplegic eye exam with a detailed binocular vision assessment. The tests for accommodation included: Amplitude of accommodation (AA) using push up method with a 0.8M target. Monocular (MAF) and binocular accommodative facility with a ± 2.00 D flippers, and Accommodative response (AR) to a +2.50 D demand in both eyes. Steady-state accommodative response was objectively measured at 2, 2.5, 3, 4 and 5 diopter ...
United States Patent [72] Inventors Robert E. VanPatten Dayton, Ohio; Paul W. Lappin, San Antonio, Tex. [211 App]. No. 847,585 [22] Filed Aug. 5, 1969 [45] Patented Mar. 30, 1971 [73] Assignee the United States of America as represented by the Secretary of the Air Force [54] INFRARED OPTOMETER 5 Claims, 5 Drawing Figs. [52] U.S. Cl 351/6, 351/9, 351/16 [51] Int. Cl A61b 3/10 [50] FieldofSearch 35l/1,6,7, 9, i4, 16, 39 [56] References Cited UNITED STATES PATENTS 2,367,855 l/l945 Ettinger 351/16X 2,385,503 9/1945 Glasser 351/6 OTHER REFERENCES F. W. Campbell et al., JOSA, High Speed infrared Optometer, Vol. 49, 03, March 1959, pp. 268-- 272 (351- 6) J. Warshawsky, JOSA, High-Resolution Optometer for Continuous Measurement of Accommodation, Vol. 54, 03, March 1964, pp. 375 379 (351- 6) Primary Examiner-David Schonberg Assistant Examiner-Paul A. Sacher Attorneys- Harry A. Herbert and Charles H. Wagner ABSTRACT: An infrared optometer device which allows manual or automatic measurement, under either ...
Waterfront Accommodations - on the Water !. Why settle for a water view when you could be on the water ? Enjoy unique accommodations on a comfortably equipp...
Aim: To determine the effect of human in vivo accommodation on the stability of the crystalline lens. Methods: Using a dual-Purkinje image (DPI) eyetracker, the phase difference and amplitudes of Purkinje images I (PI) and IV (P1V) were measured in 37 normal emmetropic subjects (34 females, 3 males; mean age 19.8, range 18-22 years) when they changed focus from 70 cm to 15 cm and simultaneously rotated their heads horizontally from side to side or made horizontal saccades between two targets 6.8° apart. Results: When the subjects changed focus from 70 cm to 15 cm and rotated their heads or made eye saccades the phase-time difference between PI and PIV decreased. During saccades, the amplitude of both PI and PIV overshoots significantly increased with focus at 15cm and their ratio (PIV overshoot amplitude/PI overshoot amplitude) significantly declined. Conclusions: The lens is stable during accommodation. The implications of these findings on the mechanism of accommodation are discussed. ...
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It can be seen from this graph that with decreasing viewing distance the amount of hyperopic defocus at the fovea due to the lag of accommodation increases. Moreover, the amount of hyperopic defocus in the near periphery also increases with decreasing viewing distance. This occurs even though the image-shell is becoming more curved due to the increasing curvature of field and perhaps ocular (and retinal) shape changes that occurs with accommodation. In absolute terms, central and near peripheral refraction became hyperopic ( Figure 7), due to the central accommodative lag. Farther in the periphery, however, the combined effect of curvature of field and accommodative lag at different viewing distances make the absolute level of defocus either unchanged or more myopic (see 30° and 40° nasal retina and 40° temporal retina in Figure 7 with accommodation). In the presence of accommodative lag, there is no point on the image surface at any eccentricity or distance of viewing which is myopic in ...
Objective To investigate the binocular accommodative function and the corelationship with development of myopia in patients with IXT.Methods Forty patients aged 8 to 15 years with IXT and 40 normal controls were recruited for a prospective case control study. Accommodative responses MEM and FCC and PRA/NRAwere tested using refractor and MEM. Results The mean accommodative responsein the dominant eyes in patients and normal control group were +0.67±0.39 D, +0.58±0.73 D.The mean accommodative responsein the nondominant eyes in patients and normal control group were +0.71±0.42 D, +0.57±0.72 D.The mean accommodative response in the dominant and nondominant eyes showed an accommodative lag. The accommodative response was symmetric in patientsand normal control group between dominant and nondominant eyes(P=0.33, P=0.81). There was no difference between the dominant eyes in patients and normal controls(t=0.461, P=0.65). The mean accommodative responsein patients with IXT and normal control group were +0.06
Previous studies of the effects of color on the accommodation response are reviewed. The monocular, steady-state response to targets under various colors of illumination is investigated. It is shown that trained observers change their level of accommodation, when viewing a target at a constant distance, to compensate for the varying ocular longitudinal chromatic aberration as the color of the target is changed. Untrained subjects, however, may initially show inconsistent responses. Results in white and green are closely comparable. Dynamic aspects of these effects are illustrated and it is shown that the ocular longitudinal chromatic aberration increases slightly with accommodation. The results are related to current ideas on the accommodative system.. © 1978 Optical Society of America. Full Article , PDF Article ...
The present invention pertains to accommodating intraocular lens (AIOL) assemblies (31) including a haptics system (32) for self-anchoring implantation in a human eyes annular ciliary sulcus (28) for retaining an AIOL (33) at a desired position along the human eyes visual axis (36), and an accommodation measurement implant (AMI) for determining accommodation and accommodation forces in an experimental set-up including an animals eye.
Background: Students accommodation might influence their growth, behaviour and study performance. There is no clarity yet about safety issues, trends in substance abuse and on effect of type of accommodations on students academic performance. Objectives: To compare students perceptions regarding in campus and off campus accommodations with respect to cost, benefit and risks associated with them and also to investigate whether type of accommodation affect medical students academic performance. Materials and Methods: In this cross sectional study, the data was collected using newly designed validated questionnaires from students who had stayed in campus accommodation (n=100) and students who had stayed in off campus accommodation (n=100). Data was analyzed using SPSS version 16. The group wise comparison was made using Mann-Whitney test. A p value of , 0.05 was considered as statistically significant. Results: The difference in the direct cost related to in campus and off campus accommodation ...
Background/aim: The technique of photoretinoscopy is unique in being able to measure the dynamics of the oculomotor system (ocular accommodation, vergence, and pupil size) remotely (working distance typically 1 metre) and objectively in both eyes simultaneously. The aim af this study was to evaluate clinically the measurement of refractive error by a recent commercial photoretinoscopic device, the PowerRefractor (PlusOptiX, Germany). Method: The validity and repeatability of the PowerRefractor was compared to: subjective (non-cycloplegic) refraction on 100 adult subjects (mean age 23.8 (SD 5.7) years) and objective autarefractian (Shin-Nippon SRW-5000, Japan) on 150 subjects (20.1 (4.2) years). Repeatability was assessed by examining the differences between autorefractor readings taken from each eye and by re-measuring the objective prescription of 100 eyes at a subsequent session. Results: On average the PowerRefractor prescription was not significantly different from the subjective refraction, ...
Revenue received from the provision of accommodation (excluding revenue received from the provision of meals and other foods and beverages). Since 1 July 2000, takings from accommodation include gross revenue from the provision of accommodation, including GST. In cases where takings from accommodation data cannot be provided inclusive of GST, the amount of GST payable is estimated and the data revised accordingly. Takings from accommodation for each month generally represent the takings received during that month. Where payments are received in advance of, or after the provision of accommodation to guests, the monthly figure for takings from accommodation may not necessarily bear a direct relationship to the number of guests accommodated during the month. Takings from accommodation is sometimes abbreviated as Takings in the text as well as in the table and graph titles in this publication ...
Academic accommodations are put in place to equalize learning opportunities and access to the academic environment for students with disabilities. The functional limitations resulting from a disability can at times intersect with the academic environment in a way that creates a barrier for students. Advisors work with students to determine what barriers they are experiencing specific to their disability and what accommodations would equalize the learning environment for them. Students with accommodations must meet all the academic requirements and standards of their courses. Accommodations do not guarantee academic achievement and students with accommodations will experience similar challenges and successes as their peers as they go through their programs. Outside of academic accommodations, there are many supports offered to students to support their learning. Any student with a documented disability can register with QSAS. Documentation will be reviewed to ensure it provides details on the ...
The measurement method used to assess the accommodative state of the eye is of greater importance. The push-up test is commonly applied to subjectively measure the accommodative amplitude, but it does not unequivocally determine the accommodative state of the eye. Many factors could influence the results provided by this test, such as pupil size variation, that affects the depth of field of the eye, and ocular aberrations. The use of devices that provide objective measurements of the accommodative state, like the Hartinger Coincidence Refractometer reported in previous studies, allows for explaining the effect of PHCl in the maximum accommodative amplitude of the eye ...
For students looking to study in Sheffield and live in University accommodation for the 2019/20 academic year, applications will open in March 2019. In March admissions will be in contact with you once you had accepted an offer to study at the University of Sheffield, at which time youll be able to apply for accommodation. Please note, you are guaranteed accommodation if you apply before August 31st 2019.. ...
Section 8 - Maintenance and Damage. 8.1 If a residents accommodation or surrounding premises are for any reason either destroyed or damaged so that the accommodation becomes unfit for habitation, subject to section 8.2, the residents right to occupy the accommodation shall thereupon terminate.. 8.2 In the event of section 8.1, MRS will endeavour to relocate the resident to similar MRS accommodation and if no suitable accommodation is available, will terminate the Residency Agreement.. Section 9 - Visitors/guests and Sub-letting. What is the MRS policy in terms of visitors/guests of residents?. 9.1 All MRS accommodation is offered as single occupancy. Residents are permitted visitors and guests - under the expectation that any guests will not negatively impact on the wider residential community. In considering requests for overnight guests (section 9.3), Heads will consider the accommodations style and the potential impact of guests within the community (and smaller residential groupings ...
spasms of accommodation - MedHelps spasms of accommodation Center for Information, Symptoms, Resources, Treatments and Tools for spasms of accommodation. Find spasms of accommodation information, treatments for spasms of accommodation and spasms of accommodation symptoms.
accommodations - MedHelps accommodations Center for Information, Symptoms, Resources, Treatments and Tools for accommodations. Find accommodations information, treatments for accommodations and accommodations symptoms.
Campbell, B., Mete, H.O., Furness, T.A., Weghorst, S. and Zabinzky, Z.B. (forthcoming). Emergency Response Planning and Training through Interactive Simulation and Visualization with Decision Support. Presented at International Conference on Technologies for Homeland Security, May 12-23, 2008, Waltham, MA, USA. [Available online under other terms] Lin, J.J.W., Parker, D.E., Lahav, M. and Furness, T.A. (2005). Unobtrusive vehicle motion prediction cues reduced simulator sickness during passive travel in a driving simulator. Ergonomics, 48(6), 608-624. Duh, B.L., Parker, D.E., Phillips, J.O. and Furness, T.A.III (2004). "Conflicting" motion cues at the frequency of crossover between the visual and vestibular self-motion systems evoke simulator sickness. Human Factors, 2004(46), 142-153. Schowengerdt, B.T., Seibel, E.J., Silverman, N.L. and Furness, T.A. (2004). Stereoscopic retinal scanning laser display with integrated focus cues for ocular accommodation. Proc. SPIE, 5291, 366-376. [Available ...
Purpose: : Many studies have used carbachol iontophoresis (CARB-ionto) or topical pilocarpine eye drops to pharmacologically stimulate accommodation in Rhesus monkeys. These methods hinder ocular measurements at the time of drug application, provide inconsistent results, and have a slow time-course. Here, the utility, safety, time-course, stability and repeatability of intravenous pilocarpine (iv-PILO) and CARB-ionto stimulated accommodation are compared. Methods: : Experiments were performed under anaesthesia on 5 previously iridectomized monkeys aged 10 to 16 years. In 3 monkeys, accommodation was stimulated with CARB-ionto in 5 successive experiments and refraction measured with a Hartinger coincidence refractometer. In separate experiments, accommodation was stimulated using a 5 mg/kg bolus of iv-PILO given over 30 seconds followed by a continuous infusion of 20 mg/kg/hr for 5.5 minutes in 3 successive experiments with the same monkeys as well as in single experiments with 2 additional ...
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Extra Health Insurance - If you have a private health insurance plan or an extended health benefits plan through work, Saskatoon Health Region will bill your insurance provider directly for your preferred accommodation charges. You will be responsible for the cost of your preferred accommodation, so be sure to check with your insurance provider or your employer to determine if preferred accommodations are covered under your plan. Not all insurance providers accept direct billing from Saskatoon Health Region at this time. If you are choosing to pay for your preferred accommodation with extra health insurance you must complete the Insurance Information Form (PDF) provided by the registration staff. This form must be completed and given to a cashier before you are discharged from the ...
Generally, an applicant or employee must let the EEOC know that he needs an adjustment or change concerning some aspect of the application process, the job, or a benefit of employment for a reason related to a medical condition.[3] An applicant or employee may request a reasonable accommodation at any time, orally or in writing. An individual should request a reasonable accommodation from the Disability Program Manager (DPM).[4] For applicants, information about contacting the DPM will be in the vacancy announcement and the letter of appointment. (See also Section II.K. on how to contact the DPM.). If an employee makes a reasonable accommodation request to someone other than the DPM, such as her supervisor, office director, district director, or regional attorney, these supervisors/managers should forward the request to the DPM immediately and must do so within 2 business days. The reasonable accommodation process begins as soon as the oral or written request for accommodation is made to any ...
Eye accommodation disorder - Can focal length change during eye accommodation? Focal length. In accommodation, the eye increases in focusing and thus decreases the focal length (a closer focal point). When accommodation is relaxed, the focal length increases again.
Some accommodations are highly focused, addressing very specific needs. Others are very broad, attempting to meet a wide range of needs for as diverse a population as possible.. Some types of accommodation can be classed as "appliances." That is, once configured, the user does not interact with the accommodation, they act through it. An example of an accommodation appliance would be setting foreground and background colors to maximize reading for a person with visual limitations. In most cases, the colors are set once, and persist. The user does not use one color set in one application, and another set in another application. Other accommodations are "tools." The individual actively uses the accommodation to enable task performance. On-screen keyboards and screen readers are examples of AT tools. The individual interacts with the on-screen keyboard to provide information to a device or application, or issues commands to the screen reader to indicate what text should be read, to spell a word that ...
As OCMS does not have accommodation facilities, we will try our best to help you with finding suitable accommodation. The links below are well known to us and are within walking distance of OCMS. Please contact them first to see if they have anything available and to make your own arrangements first. Failing that, please contact us at [email protected] Since it is always a challenge to find suitable reasonably priced accommodation in Oxford, please start looking early, and if you need our help, please give us plenty of notice. After you have asked us to look for accommodation for you, if in the meantime you have found something, please let us know immediately to avoid double booking by using the above email address.. David Jung, 65A Edgeway Road, Marston, Oxford OX3 ...
To enhance your hospital experience, we offer private and semi-private rooms and Victorian Suites on the Maternal and Newborn Care Unit (maternity). These rooms may be available upon request and offer additional privacy and convenience. They also include premium plus cable TV and telephone services in the cost of the room.. While we will make every effort to place you in a preferred accommodation, your requested accommodation may not be available to you at the time you request it. During your stay in a preferred accommodation you may be relocated to another room to accommodate a patient with unique medical needs.. If you are requesting a private or semi-private room or a Victorian Suite please make sure that you have signed the Agreement to Pay for Preferred Accommodations Form (PDF). These are also provided by registration clerks. ...
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Accommodation reflexes are the reflex action of the eye to focus on distant objects and near objects. This movement consists of coordinated pupil size, lens shape, and vergence changes. This movement depends on the cranial nerve II, the cranial nerve III, and the superior center. The cranial nerve is a member of the afferent reflex. The superior center is interneuron. The shape changes of the lens will be controlled by the ciliary muscles that are inside your eyes. Changes in contraction of the ciliary muscles will cause the image to be distant or close to focus on the retina. This change can change the focus distance in your eyes. The movement will be controlled by the parasympathetic nervous system.. This involves three responses consisting of convergence, lens accommodation, and pupil accommodation. Light from near and far objects will be brought to the focus of the retina. Near objects will look great in the field of vision so the eyes will get light from a wide angle. The eye will meet as ...
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Some of you may remember that I was weirdly excited about the yurt, which Susan told me was where the interns live. As it turns out, my excitement was a bit premature. Brian and Autumn, the other two interns who arrived last week, are living in the yurt. I was a little disappointed to start, but now that Ive settled into the platform tent next door, Im completely over my sadness ...
Clark College will provide accommodations to otherwise qualified individuals with disabilities, who without these accommodations would not be provided equal access, unless an accommodation would alter the fundamental requirements of the course or program. Accommodations are based on the current impact of the functional limitation(s) of the disability. In order to fully evaluate requests for accommodations, Clark College generally requires documentation of the disability. This consists of an evaluation by an appropriate professional and describes the current impact of the disability as it relates to the accommodation request. The cost and responsibility for providing documentation shall be borne by the student. Note: There are cases when Disability Support Services (DSS) staff can exercise professional judgment, in lieu of documentation. Documentation received is kept in the Disability Support Services Office. Information will only be released to Clark College personnel on an educational need to ...
Testing Accommodations for College Board Tests (AP, SAT, PSAT): In order to receive accommodations on these tests, a Student Eligibility Form must be submitted. The form must be completed by parents and school officials and then mailed to the College Board at least seven weeks in advance of the student taking the first test. The criteria established by the College Board for granting testing accommodations varies significantly from the school system. Having an IEP or a 504 plan does not guarantee that the College Board will provide accommodations. Currently, the College Board requires up-to-date (meaning within the last three years) neuro-psychological testing that documents the specific need for each requested accommodation. Please contact the Academic Support Center (301-803-7140) or the Counseling Office (301-803-7121) in order to obtain the forms and to ask questions about this process ...
Accommodative response was measured by having subjects switch the right lens to a spherical lens in the appropriate power. This was done for all subjects regardless of which lens they were randomized to, to maintain masking. Subjects wore an infrared filter over the right eye for occlusion and to ensure that they were fixating with the left eye (which was still wearing the lens they were randomized to). This filter allowed for measurements to be taken with the WAM-5500 open field autorefractor in front of the right eye. This method assumes a symmetrical accommodative response between eyes. Since accommodative response was measured monocularly, this eliminated any convergent accommodation, but this was consistent between lenses and test distances. Five measurements were taken at each test distance (distance, 40cm and 25cm). The 5 readings obtained were used to calculate mean spherical equivalent value at each test distance and compared to expected accommodative value to determine lag ...
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The Building of Hope, the Leukaemia Foundations $9.1 million Victorian Patient Accommodation Centre is nearing completion and the Victorian Government has helped fast-track the project with a generous and substantial financial contribution of $500,000 towards the new accommodation facility.. General Manager, Stephanie Hechenberger was thrilled with the result and is looking forward to welcoming families to a world class accommodation facility. "This important project will mean leukaemia patients and people with other from regional Victoria coming to Melbourne for treatment can have peace of mind not having to worry about where to stay, or whether their family can come with them", said Minister for Health, Jill Hennessey. "Being able to stay across the road from the new Victorian Comprehensive Cancer Centre will mean regional people will have access to our best and brightest minds and cutting-edge cancer treatment". The facility will also provide families with onsite support services through our ...
Each academic department will provide the academic accommodations needed by the student. These academic accommodations may include but are not limited to extended time for tests, note takers, use of a tape recorder in class, reading exam questions to a student, a scribe to record a students answers to test questions, and the use of a computer for an essay exam. Other Campus departments will be responsible for making accommodations as necessary.. ...
ACCOMMODATION. Accommodation at Aro Hā has been designed to celebrate the fundamental acts of sleeping and bathing in Zen inspired luxury. There are 8 accommodation units each with a unique aspect.. Rooms are well appointed and have a sustainable, ecologically friendly story. Furnished in a refined, uncluttered manner. Recycled timbers, woven natural dyed blankets, organic cotton linen, New Zealand wool floor rugs and natural latex mattresses. There are desks for journaling and spaces for reading. Rooms are well lit and all have views.. Bathrooms are well appointed, designed to be shared and feature separate shower/bath/toilet spaces. Bathrobes and oversized towels are in all bathrooms as are organic body & shower products.. In the foyer of the Eco Suites & Monastic Singles there is space to sit, change shoes, and share herbal teas.. There is a laundry service and also a separate drying room for hiking boots & jackets.. Aro Hā, by design, encourages shared space. Experience tells us that ...
New students and continuing students requesting special housing considerations for the first time must complete and submit the Accommodation Request Form and documentation of disability to AES. Continuing students with housing accommodations, who wish to have the same accommodations for the following year, should notify AES by February 1 ...
What are reasonable accommodations? What accommodations do people with diabetes need? Find information about your right to workplace accommodations here.
Though extended depth-of-focus lenses tend to be more forgiving of residual refractive error and mild decentration than other presbyopia-correcting IOLs, it is important to select patients carefully and follow good preoperative protocols for a successful outcome.
Further, this explanation is of interest in relation to the problem mentioned at the beginning of this paper. So far as localisation relation to the fixation point goes, there is no evidence that the alteration of spatial relations is in any way dependent on accommodation. It is in the localisation of the fixation point itself that this may play a part, and in this connection the atropin experiments present several points of interest. In the normal experiment, the localisation might have as its basis the sensations arising from the peripheral accommodation, and this seems to point to the fact that the localisation of the fixation point depends altogether on central factors. Several objections may be brought forward; first, that the ciliary muscle was not completely paralysed. It is not easy to say that the power of accommodation is completely abolished, but the appearance occurred after the application of atropin for four days, and I was unable to detect the existence of any accommodation. I ...
Accommodation: The initial stimulus for accommodation is a blurred visual image that first reaches the visual cortex. Through a series of cortical connections, the blurred image reaches two specialized motor centres. One of these, located in the frontal cortex, sends motor commands to neurons in the oculomotor nucleus controlling the…
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Appropriate housing poses unique challenges for different demographic groups. For example, there are gender differences in housing needs-women are more likely to live independently, whereas men seek out housing arrangements that are more dependent (Cook 1998). Affordable housing in safe neighbourhoods is essential for single women and women with children (Blanch, Nicholson & Purcell 1998). Families need comprehensive accommodation services that build resilience to help compensate for the stresses of poverty and disadvantage (NSW Health 2002b p12). Teenagers and young adults need accommodation options that match their life-stage, and that do not increase their risk in other areas (such as sexual abuse and harmful alcohol and other drug use). For older people, age-related health problems, such as mobility and self-care problems, make housing needs especially complex ...
as long as applications are received by the deadline of 31st July.. When you apply for accommodation, please note, you do NOT have to hold an Unconditional offer to submit your application: as long as your response is Firm, you will still be able to apply, even if your offer from the University of Exeter is Conditional. However, a room will not be allocated to you until all the conditions of your offer have been met.. Undergraduate students have a choice of catered or self-catered accommodation. There is a broad range of options: twin rooms, single studio bedrooms with bathroom and kitchen attached, and more. Postgraduate, Study Abroad and Erasmus students can only apply for self-catered accommodation.. For full details of the options available, as well as prices, facilities and 360-degree virtual tours of some of the rooms, visit our accommodation pages.. Students who would like to rent private, rather than University-run, accommodation can use the Accommodation Offices online database of ...
You are required to present documentation supporting a request for accommodation. Information is gathered from a meeting with an advisor; the advisors observations, experience, and professional judgement; and medical and/or psycho-educational reports.. A recommendation made by a physician, psychologist or other health-care practitioner is one piece, among many pieces of information, considered when determining an accommodation plan.. Recommendations are considered in context of the learning and living environment and course/program learning outcomes. ...
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Hi, I want to put Bristol as my insurance choice for Biochemistry and Ive got a pretty tough offer to make for my first choice. I really like Bristol when I saw it but there seems to be a lot of talk about Bristol having some really bad accommodation, if not, none at all sometimes. Has anyone else gone to Bristol as their insurance choice and experienced getting accommodation or know anyone who did this ...
The Internet is rapidly becoming the dominant user decision making tool for the hotel accommodation purchase process. This paper critically reviews online hotel accommodation purchase processes...
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Our service is located in the:. Ophthalmology Out Patient Department, Gartnavel General Hospital, 1053 Great Western Road, Glasgow, G12 OYN Please click on "travel" below to help plan your journey. If you plan to travel the day before the clinic, please click on "accommodation" below. ...
Accommodations are changes to materials or procedures that enable students with disabilities or English language learners (ELLs) to participate meaningfully in learning and testing. It is important to keep in mind that while some accommodations may be appropriate for instructional use, they may not be appropriate or allowable on a statewide assessment.. Some common accommodations for students with dyslexia include: ...
If you are interested in applying for employment with Novo Nordisk and need special assistance or an accommodation to use our website or to apply for a position, please call the U.S. Toll Free number at 1-855-411-5290 or click on the following link to submit your request: https://www.surveymonkey.com/r/novoaccommodation. Please note we do not accept applications for employment or employment related solicitations through this site. If you are requesting special assistance, please specify your request by selecting "Yes" in Question 2 on the site. We will not be able to respond to requests unless you specify the need for special assistance or an accommodation in Question 2. Determinations on requests for reasonable accommodation are made on a case-by-case basis. ...
PURPOSE: To investigate the effects of different near addition lenses and prisms on accommodative microfluctuations (AMFs) in Chinese early-onset myopic (EOM) and emmetropic (EMM) children. METHODS: Twenty-one EMM and 27 EOM children aged between 9 and 14years participated in the study. At near, 23 children were exophoric (exo, ,0 Δ), and 25 were esophoric (eso, ≥0 Δ). The AMFs and phoria through multiple addition lenses (-1.00, 0, +1.00, +2.00, and +3.00D on each eye) and prisms (base-in prism power: 3 Δ, 2 Δ, 1 Δ; and base-out prism power: 1 Δ and 2 Δ on each eye) were measured at 25cm under binocular viewing conditions with a Grand Seiko WAM-5500 auto-refractor and a modified Thorington card ...
The taught component will finish with a substantial group project, with students from different backgrounds working on a practical industry focused data analysis problem. Following this, and in years 2-4, you will carry out PhD research, guided by PhD supervisors from within the centre, and typically additional advisors from industry. The CDT is located alongside high tech industry and commerce in custom accommodation on the Universitys new Science Central site.. The CDT is supported by many industrial partners worldwide. Many of the main research projects will be problems motivated by our industrial partners, and will include the opportunity to work at the industrial partner for a short placement. The CDT also has strong academic links with international groups having a similar vision, including Berkeleys AMPLab and PUCRS in Brazil. A limited number of students will have the opportunity to take part in an exchange programme with our academic partners.. Two-day off-site retreats will take ...
Lodging: To enhance your learning experience and ease your travel, we offer accommodations a short walk from the Institute through the Pankey Condos at Key Colony. The Pankey Condos at Key Colony are a group of condo units with daily housekeeping service, well-equipped kitchens and common areas. You will have privileged access to pristine beachfront, walking trails, an Olympic size swimming pool, and equipped gym.. Accommodations are available in the Pankey Condos at Key Colony (two course participants per bedroom in a two or three bedroom condo). Single occupancy bedrooms are subject to availability for an additional charge.. Refund/Cancellation Policy: A $1000.00 non-refundable deposit is due at the time of registration. The tuition balance is due 90 days prior to the start date of the course. Requests to cancel must be made in writing. Requests received prior to 90 days before the start of the course will be subject to forfeiture of the deposit and 50% of the course tuition, however, the ...
Lodging: To enhance your learning experience and ease your travel, we offer accommodations a short walk from the Institute through the Pankey Condos at Key Colony. The Pankey Condos at Key Colony are a group of condo units with daily housekeeping service, well-equipped kitchens and common areas. You will have privileged access to pristine beachfront, walking trails, an Olympic size swimming pool, and equipped gym.. Accommodations are available in the Pankey Condos at Key Colony (two course participants per bedroom in a two or three bedroom condo). Single occupancy bedrooms are subject to availability for an additional charge.. Refund/Cancellation Policy: A $1000.00 non-refundable deposit is due at the time of registration. The tuition balance is due 90 days prior to the start date of the course. Requests to cancel must be made in writing. Requests received prior to 90 days before the start of the course will be subject to forfeiture of the deposit and 50% of the course tuition, however, the ...
4552. Policy To protect the public health, safety and welfare, it is declared to be the policy of this State to keep continually in review all practices infringing on the basic human right to a life with dignity, and the causes of these practices, so that corrective measures may, where possible, be promptly recommended and implemented, and to prevent discrimination in employment, housing or access to public accommodations on account of race, color, sex, sexual orientation, physical or mental disability, religion, ancestry or national origin; and in employment, discrimination on account of age or because of the previous assertion of a claim or right under former Title 39 or Title 39-A and in housing because of familial status; and to prevent discrimination in the extension of credit on account of age, race, color, sex, sexual orientation, marital status, religion, ancestry or national origin; and to prevent discrimination in education on account of sex, sexual orientation or physical or mental ...
Too little is being done to ensure that students with disabilities receive appropriate accommodations on the SAT, ACT and other standardized tests, according to
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Lens Accommodation Simulation We are working hard to extending our simulation capabilities from cornea-sclera only to the full eye. Along this path, we are i...
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In this edition of reSearch we explore the topic of workplace accommodations for individuals with disabilities. According to the U.S. Census Bureau, 2009 American Community Survey presented in the Annual Disability Statistics Compendium 2010 by the RRTC on Disability Statistics and Demographics individuals with disabilities comprise 12 percent of the total U.S. population (301,472,074 ) (2010, p. 6). According to the 2009 data charts, only 35.4 percent of the total number of individuals with disabilities ages 18 to 64 years are employed compared to 74.3 percent of the non-disabled population within the same age range (2010, p. 21-22). In 2009, the gap between percentage of workers with and without disabilities was 39.1 percent. Statistical trends show that the number of individuals with disabilities rose by 0.22 percent from 2008 to 2009 and the employment gap rose 0.5 percent between the same years (2010, p. 17, 30). When reviewing the 2009 statistical data for individuals with and without ...
Durham is a small city, and there is a variety of accommodation types, locations, and costs in the area. Rental charges vary depending upon these factors. Some students live in the surrounding areas that are around 2-4 miles away from the main University Lower Mountjoy site. This area map shows the different locations. These areas also have good public transport links where the services can be accessed at a discount with the use of your student campus card ...
Find a wide range of Student Accommodation in Peterhead. Search for Student Flats, Shared Houses, Halls of Residence and Private Halls close to campus.
Find a wide range of Student Accommodation in Eccles. Search for Student Flats, Shared Houses, Halls of Residence and Private Halls close to campus.
Students with disabilities may request reasonable accommodation. Office of Disability Services (ODS) registration should be completed prior to the provision of accommodations. Please contact the Office of Disability Services to request an intake appointment to complete registration and request accommodations.. Students who have completed ODS registration are encouraged to meet with faculty during week 1 of class to discuss accommodation plans for the course.. ...
The symptoms and severity of HIV vary widely and can fluctuate over time. Students with HIV may appear to have no symptoms at all or may have flu-like symptoms. Treatment with medication is successful in slowing the progression of the disease sometimes for substantial time periods. The human immunodeficiency virus (HIV) is a virus that damages the cells of the immune system. As HIV infection progresses, the immune system weakens and the body becomes less able to fight infection ...
KPI Library | Accommodation & Food. KPI Library is a community for performance management professionals. Use KPI Library to search for Key Performance Indicators by process and industry, ask help or advice, and read articles written by independent experts.
KPI Library | Accommodation & Food. KPI Library is a community for performance management professionals. Use KPI Library to search for Key Performance Indicators by process and industry, ask help or advice, and read articles written by independent experts.
The Municipality of Rotterdam is the secondary beneficiary and co-financer of the various pilots. This ensures that all the pilots are conducted according to the same methodology and that the results on the individual locations have relevance for the overview at the urban scale. In addition the pilots prove to be a reality check for the inventory: the past years drastic changes have already taken place in the occupancy of the locations. Comparing the snapshots from the fall of 2013 with the current situation provides a first impression of the mutations that are already taking place in healthcare accommodations.. Due to a subsidy granted by the Stimulation Fund for Creative Industry its possible to pay more attention to spatial and design aspects of the research in a few of the pilots. To this end, collaboration was sought with jefvandenputte architecture that provides the building technical analysis and the housing possibilities, while designer Bouwdewien van den Berg utilises an image analysis ...
The Michener Institute is committed to providing accessibility & accommodations for people with a documented disability and providing a learning and working environment in which all students are treated with respect and dignity. Each person has the right to learn in a professional atmosphere that promotes equal opportunities and one that prohibits discriminatory practices.. This policy conforms to the legal requirements as set out in the Human Rights Code, Workplace and Insurance Act, Employment Standards Act, Integrated Accessibility Stabdards and any other applicable legislation.. ...
NELSON Mandela Metropolitan University (NMMU) will be assisting nearly 500 students with temporary accommodation so that they can complete their December examinations.
The Humber College Institute of Technology and Advanced Learning and the University of Guelph-Humber (hereafter referred to as "Humber" or "the College") is committed to providing an accessible learning, working, and living environment that is inclusive of all persons and supports all members of the Humber community in an equitable manner. The College will support and facilitate the accommodation of employees with disabilities so that they are able to safely access all the opportunities that the College offers, subject only to the limits of undue hardship.. The College recognizes the importance of inclusion by design and barrier removal in the integration of employees with disabilities. The College will work to eliminate or minimize the adverse effects of all forms of barriers in accordance with its obligations under the Human Rights Code ("the Code"), and the Accessibility for Ontarians with Disabilities Act, 2005 ("the AODA"). The College has implemented an Accessibility Policy and an ...
Luxury accommodation in renovated Shearers Cottage, situated in private surroundings on 650ha working crop, beef and lamb finishing farm near Otane. Enjoy the views of the Drumpeel Valley Farmland 25 mins south of Hastings on SH2. Includes Farm Tour.
The reimbursement of incurred accommodation expenses is paid as a flat rate for a set amount of up to a maximum of €90 per person per night. This set amount includes a provision to cover breakfast expenses. Up to 3 nights can be covered by COST. Note that Taxis are not reimbursable unless there is no other option available, so we highly encourage participants to fly to Stansted, the closest airport to Cambridge, easily accessible via train ...
I recently had to start going to a campus for something(cant go into detail why for privacy reasons). The campus is large and spread out. The kind of environment where I need a scooter to get around. I do not have a scooter yet but am in the process of trying to find a suitable one which is small enough to fit in the car. We have to make special parking accommodations now and I have to have a special seating arrangement so my alignment doesnt go completely out of whack. A little advice to
Or there is the issue of accommodation. The simple solution for a business would be not to hire an Autistic person, but that is yet again, discrimination. Assume, then, that this person has gotten hired or has gotten accepted into school. In either case, getting any accommodations requires disclosing Autistic status, which opens them up to discrimination. Even post disclosure, clearly reasonable accommodations such as "I am allowed to bring in my own noise-cancelling headphones and use them to reduce the noise level," or "I am allowed a quiet, non-distracting fidget toy for times when my hands are not actively required" are not given. In many cases, those basic things would be sufficient. In others, "Text-based and face-to-face communication are to be used whenever possible to communicate with me and phones to be avoided" is the needed statement, and that, too, is not given. These are accommodations which do not cost anything to provide, and yet they are not given. This sort of basic ...
Tygervalley Eye and Laser Centre offers information regarding accommodations and transportation to and from your LASIK procedure.
From grand luxury hotels in the city centre or small family-run hotels nestled in the green hills to tourist or hotel residences, Nice offers a very wide range of accommodation to satisfy all the participants. ...
Stay in country town accommodation, business or pleasure. Te Puke is the Kiwifruit Capital of the world & home to Comvita Central to Tauranga, Mt Maunganui, Rotoura & Whakatane. 10 minutes to the white sandy beaches at Papamoa.
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An accommodating intraocular lens includes an optic portion, a haptic portion. The optic portion of the lens includes an actuator that deflects a lens element to alter the optical power of the lens responsive to forces applied to the haptic portion of the lens by contraction of the ciliary muscles and a secondary deflection mechanism. Movement of the lens element by the actuator causes the lens element to deform and the secondary deflection mechanism causes the lens to further deform.
An accommodating intraocular lens is provided having optical parameters that are altered in-situ, wherein an optic portion of the lens includes an actuator that deflects a lens element to alter the optical power of the lens, responsive to forces applied to a haptic portion to the lens by contraction of the ciliary muscles. Forces applied to the haptic portion may result in fluid displacements from or to the haptic portion from the actuator. Displacement of fluid to the actuator may either increase or reduce the degree of deflection imposed on the lens element by the actuator.
This page provides relevant content and local businesses that can help with your search for information on Convergence Insufficiency Treatment. You will find informative articles about Convergence Insufficiency Treatment, including Study Finds Best Treatment for Common Childhood Eye Problem. Below you will also find local businesses that may provide the products or services you are looking for. Please scroll down to find the local resources in Fort Morgan, CO that can help answer your questions about Convergence Insufficiency Treatment.
0105]FIGS. 23-24 illustrate a capsular shaping system with a first shaping body 500C similar to that of FIG. 16A together with a second independent inverted shaping device 600. The first device is adapted to engage the posterior capsule and a limited equatorial region (cf. FIG. 16A). The second device 600 is adapted for engaging only the anterior capsule and a limited equatorial region. The second shaping device 600 has a number of extending portions 616a-616d that cooperate with and are spaced between the corresponding portions of the first device 500B when implanted in a capsular sac. The second device 600 further defines an annular portion 605 that transitions into the extending portions 616a-616d. Of particular interest, the use of first and second independent shaping devices for engaging the anterior and posterior capsules with independently responsive elements allows the lens capsule to respond to zonular tensioning and de-tensioning more like a natural lens capsule. This can be understood ...
A geometrical-optical technique is used to predict the changes in the slope of the eccentric-photorefraction intensity profiles as a function of refractive state. We investigate how the intensity profiles vary with refractive state for different light source configurations and monochromatic aberrations in the eye. The best possible light source configuration extends from zero eccentricity (to increase sensitivity and reduce the dead zone) to a high eccentricity (to increase the working range). An advantage of using the extended light source is that the intensity profile of the eccentric-photorefraction reflex is more linear for extended sources than for point light sources. It is also shown that the change in slope with refractive state is dependent on pupil size. Furthermore, when asymmetric aberrations are present, the change in intensity profile slope with refractive state is dependent on the circumferential position of the light source, but this dependence can be resolved by averaging slope ...
Yam JC, Jiang Y, Tang SM, Law AKP, Chan JJ, Wong E, Ko ST, Young AL, Tham CC, Chen LJ, Pang CP.. PURPOSE: Low-concentration atropine is an emerging therapy for myopia progression, but its efficacy and optimal concentration remain uncertain. Our study aimed to evaluate the efficacy and safety of low-concentration atropine eye drops at 0.05%, 0.025%, and 0.01% compared with placebo over a 1-year period.. DESIGN: Randomized, placebo-controlled, double-masked trial.. PARTICIPANTS: A total of 438 children aged 4 to 12 years with myopia of at least -1.0 diopter (D) and astigmatism of -2.5 D or less.. METHODS: Participants were randomly assigned in a 1:1:1:1 ratio to receive 0.05%, 0.025%, and 0.01% atropine eye drops, or placebo eye drop, respectively, once nightly to both eyes for 1 year. Cycloplegic refraction, axial length (AL), accommodation amplitude, pupil diameter, and best-corrected visual acuity were measured at baseline, 2 weeks, 4 months, 8 months, and 12 months. Visual Function ...
Multifocal and Accommodating intraocular lenses are artificial intraocular lenses (IOLs) that are designed to provide focus of both distance and near objects, in contrast to monofocal intraocular lenses which only have one focal point and correct distance vision. The issue of restoring accommodation following cataract surgery or through refractive lens exchange is becoming an increasingly important topic in ophthalmology. Intraocular lenses that correct presbyopia are divided into two main categories: Multifocal IOLs: achieve near and distance vision by having two (bifocal) or three (trifocal) focal points simultaneously. The function of multifocal IOL depends on the pupil size for refractive types. The concept is based on the principle that the pupil tends to constrict for near tasks, so the central portion of the lens is designed for near and the outer portion for distance. For diffractive types of multifocal IOLs, light is split by diffraction and the vision is pupil independent. ...
Bodily Function Control : Students with a spinal cord injury may have bodily control difficulties due to nerve damage in the spinal cord. Breathing Difficulty : Students with spinal cord injuries may have breathing difficulties due to an inability to breathe deeply. Climate Sensitivity : Students with spinal cord injury have difficulty with regulating body temperature in hot and cold weather which can cause muscle spasms, heat stroke and frost bite. Fatigue (Physical) : Students with spinal cord injuries may experience physical fatigue due to breathing issues, mobility issues, low blood pressure, or chronic pain. Motor Skill (Fine) : Spinal cord injuries can lead to decreased fine motor skill ranging from some lack of strength and control to full paralysis of fingers. Motor Skill (Gross Lower) : Students with a spinal cord injury may experience muscle spasms, especially in the heat. Motor Skill (Gross Upper) : Students with a spinal cord injury may have difficulty with muscle control or ...

Accommodation | ocular | Britannica.comAccommodation | ocular | Britannica.com

The initial stimulus for accommodation is a blurred visual image that first reaches the visual cortex. Through a series of ... In human eye: Accommodation. The image of an object brought close to the eye would be formed behind the retina if there were no ... Second, the focus (accommodation) of the eyes must be adjusted for near vision. The link between convergence of the eyes and ... The initial stimulus for accommodation is a blurred visual image that first reaches the visual cortex. Through a series of ...
more infohttps://www.britannica.com/science/accommodation-ocular

Ocular Accommodation, Convergence, and Fixation Disparity A Manual of Clinical Analysis | Rent 9780409903065 | 040990306XOcular Accommodation, Convergence, and Fixation Disparity A Manual of Clinical Analysis | Rent 9780409903065 | 040990306X

Ocular Accommodation, Convergence, and Fixation Disparity A Manual of Clinical Analysis. Ocular Accommodation, Convergence, and ... Goss, David A. is the author of Ocular Accommodation, Convergence, and Fixation Disparity A Manual of Clinical Analysis with ...
more infohttps://www.valorebooks.com/textbooks/ocular-accommodation-convergence-and-fixation-disparity-a-manual-of-clinical-analysis/9780409903065&default=buy

The influence of downward gaze and accommodation on ocular aberrations over time | JOV | ARVO JournalsThe influence of downward gaze and accommodation on ocular aberrations over time | JOV | ARVO Journals

... no accommodation (0.2 D) in primary gaze, (ii) no accommodation (0.2 D) in downward gaze, (iii) 2.5-D accommodation in primary ... we aimed to investigate changes in ocular aberrations associated with accommodation in downward gaze. We measured ocular ... 2002). Changes of ocular aberration with accommodation. American Journal of Ophthalmology, 134, 924-926. [CrossRef] [PubMed] ... Accommodation is known to cause substantial changes in some aspects of ocular aberrations. These changes typically include a ...
more infohttp://jov.arvojournals.org/article.aspx?articleid=2121039

Potential Signal to Accommodation From the Stiles-Crawford Effect and Ocular Monochromatic Aberrations Available in the Shape...Potential Signal to Accommodation From the Stiles-Crawford Effect and Ocular Monochromatic Aberrations Available in the Shape...

Potential Signal to Accommodation From the Stiles-Crawford Effect and Ocular Monochromatic Aberrations Available in the Shape ... Potential Signal to Accommodation From the Stiles-Crawford Effect and Ocular Monochromatic Aberrations Available in the Shape ... Potential Signal to Accommodation From the Stiles-Crawford Effect and Ocular Monochromatic Aberrations Available in the Shape ... Results:: Accommodation did not differ significantly from that in the control condition for the SC condition (F = 0.32, p = .59 ...
more infohttp://iovs.arvojournals.org/article.aspx?articleid=2388301

Ill-sustained accommodation | definition of ill-sustained accommodation by Medical dictionaryIll-sustained accommodation | definition of ill-sustained accommodation by Medical dictionary

What is ill-sustained accommodation? Meaning of ill-sustained accommodation medical term. What does ill-sustained accommodation ... Looking for online definition of ill-sustained accommodation in the Medical Dictionary? ill-sustained accommodation explanation ... spectacle accommodation The amplitude of accommodation referred to the spectacle plane. Symbol: As. See ocular accommodation.. ... tonic accommodation See resting state of accommodation.. vergence accommodation See convergence accommodation.. Fig. A4 A ...
more infohttp://medical-dictionary.thefreedictionary.com/ill-sustained+accommodation

Accommodation | definition of accommodation by Medical dictionaryAccommodation | definition of accommodation by Medical dictionary

... accommodation explanation free. What is accommodation? Meaning of accommodation medical term. What does accommodation mean? ... Looking for online definition of accommodation in the Medical Dictionary? ... spectacle accommodation The amplitude of accommodation referred to the spectacle plane. Symbol: As. See ocular accommodation.. ... tonic accommodation See resting state of accommodation.. vergence accommodation See convergence accommodation.. Fig. A4 A ...
more infohttps://medical-dictionary.thefreedictionary.com/accommodation

Search | Britannica.comSearch | Britannica.com

Accommodation (ocular) The image of an object brought close to the eye would be formed behind the retina if there were no ...
more infohttps://www.britannica.com/search?query=eye%20length&fuzzy=No

Search | IOVS | ARVO JournalsSearch | IOVS | ARVO Journals

Ocular Anterior Segment Biometry and High-Order Wavefront Aberrations During Accommodation PDF ... Synchronized Real Time Imaging of Ocular Anterior Segment Biometry and Ciliary Muscle during Accommodation ... Relationships between the Aberrations and the Morphology of Ocular Anterior Segment during Accommodation ... TAGS: visual accommodation, biometry, lens, crystalline, lens (device), eye, ciliary muscle, capillary malformation Invest. ...
more infohttps://iovs.arvojournals.org/solr/searchresults.aspx?author=Yilei+Shao

Connecting Contact Lenses and Digital Technology - Study Results - ClinicalTrials.govConnecting Contact Lenses and Digital Technology - Study Results - ClinicalTrials.gov

Ocular Accommodation. Convergence, Excess. Interventions Device: Test Daily Disposable Soft Contact Lenses. Device: Control ... Lag of Accommodation while wearing ... Lag of Accommodation while wearing ... Arm/Group Description: Lag of Accommodation while ... Since accommodative response was measured monocularly, this eliminated any convergent accommodation, but this was consistent ... The clinical aspects of accommodation and convergence. Am J Optom 1944; 21:301-13. ...
more infohttps://www.clinicaltrials.gov/ct2/show/results/NCT02921087?term=Contact&rank=42

Accommodation dynamics in divergence excess exotropia. - Semantic ScholarAccommodation dynamics in divergence excess exotropia. - Semantic Scholar

Latency for decreasing accommodation was increased significantly, and overshoot frequency was decreased, in the divergence ... Objective recording of accommodation dynamics was performed in four patients with divergence excess exotropia (two true and two ... excess exotropes of the true variety, thus demonstrating slightly slowed accommodation dynamics in this diagnostic group. These ... Acceleration characteristics of human ocular accommodation. *Shrikant R. Bharadwaj, Clifton M. Schor ...
more infohttps://www.semanticscholar.org/paper/Accommodation-dynamics-in-divergence-excess-Schnider-Ciuffreda/41da0f5908ea37891ffeddd56b4e26cf2cec445c

Publications from UOBSPublications from UOBS

A model to illustrate ocular accomodation. Turtox News 28(8):146- 148. ...
more infohttp://www.ou.edu/uobs/research/publications-from-uobs

OSA | Accommodation and colorOSA | Accommodation and color

Spectral bandwidth and ocular accommodation Karan R. Aggarwala, Ekaterina S. Kruger, Steven Mathews, and Philip B. Kruger. J. ... Factors Influencing Accommodation Responses of the Human Eye F. W. Campbell and G. Westheimer. J. Opt. Soc. Am. 49(6) 568-571 ( ... Astigmatism, accommodation, and visual instrumentation W. N. Charman and H. Whitefoot. Appl. Opt. 17(24) 3903-3910 (1978) ... Convergence accommodation Daniel Kersten and Gordon E. Legge. J. Opt. Soc. Am. 73(3) 332-338 (1983) ...
more infohttps://www.osapublishing.org/josa/abstract.cfm?uri=josa-68-4-459&usertoken=%7Btoken%7D

Frontiers | Attentional selection of levels within hierarchically organized figures is mediated by object-files | Frontiers in...Frontiers | Attentional selection of levels within hierarchically organized figures is mediated by object-files | Frontiers in...

Lawson, M. L., Crewther, S. G., Junghans, B. M., Crewther, D. P., and Kiely, P. M. (2005). Changes in ocular accommodation when ...
more infohttps://www.frontiersin.org/articles/10.3389/fnint.2014.00091/full

Symptomatology associated with accommodative and binocular vision anomalies | Journal of OptometrySymptomatology associated with accommodative and binocular vision anomalies | Journal of Optometry

Ocular pain 24 CISS V-15 (21), CIRS Symptom questionnaire parent version (1), CISS 16 Item (1), Birnbaum (1) ... Children may abandon a task due to their inability to maintain adequate accommodation and/or vergence in the plane of fixation. ... These findings confirm that it is difficult to disjoin accommodation from vergence system. Due to the link between both systems ... Accommodation and the relationship to subjective symptoms with near work for young school children. ...
more infohttp://www.journalofoptometry.org/en-symptomatology-associated-with-accommodative-binocular-articulo-S1888429614000570

Duke PhysicsDuke Physics

E. Samei and S.E. Morse, Ocular accommodation in viewing radiological images (2001) [abs] . ...
more infohttp://fds.duke.edu/db?pubs-15-36-1167-0--16-0

cardiovascular physiologic phenomenacardiovascular physiologic phenomena

Cognition, ocular accommodation, and cardiovascular function in emmetropes and late-onset myopes. Leon Nicholas Davies. ... objectively and noninvasively the role of cognitive demand on autonomic control of systemic cardiovascular and ocular ...
more infohttps://www.labome.org/topics/physical/natural/biological/circulatory/cardiovascular/cardiovascular-physiologic-phenomena-19998.html

HITLab : Thomas A. Furness IIIs papersHITLab : Thomas A. Furness III's papers

Binocular retinal scanning laser display with integrated focus cues for ocular accommodation. Proceedings of the SPIE, Vol. ... Stereoscopic retinal scanning laser display with integrated focus cues for ocular accommodation. Proc. SPIE, 5291, 366-376. [ ... Binocular retinal scanning laser display with integrated focus cues for ocular accommodation. Presented at Stereoscopic ... Schowengerdt, B.T., Kelly, J.P., Seibel, E. J. and Furness, T. A. III (2001). Strong accommodation bias to a collimated retinal ...
more infohttp://www.hitl.washington.edu/people/papers.php?name=tfurness

Publikationer - Högskolan i GävlePublikationer - Högskolan i Gävle

Superior short-wavelength contrast sensitivity in asthenopics during reflexive readjustments of ocular accommodation. ... Forsman, M., Lodin, C. & Richter, H. (2012). Co-variation in time between near-far accommodation of the lens and trapezius ... Richter, H., Bänziger, T. & Forsman, M. (2011). Eye-lens accommodation load and static trapezius muscle activity. European ... Zetterberg, C., Richter, H. & Forsman, M. (2015). Temporal co-variation between eye lens accommodation and trapezius muscle ...
more infohttps://www.hig.se/Ext/Sv/Organisation/Akademier/Akademin-for-halsa-och-arbetsliv/Forskning-vid-akademin/Forskare-vid-akademin-for-halsa-och-arbetsliv/Arbetshalsovetenskap---CBF/Forskare-Arbetshalsovetenskap-CBF/Hans-Richter-sv/Hans-Richter/Publikationer.html

Test-Retest Reliability of Functional Magnetic Resonance Imaging Activation for a Vergence Eye Movement Task | SpringerLinkTest-Retest Reliability of Functional Magnetic Resonance Imaging Activation for a Vergence Eye Movement Task | SpringerLink

Single-unit activity in the primate nucleus reticularis tegmenti pontis related to vergence and ocular accommodation. J ... A comparison of Duanes and Donders tables of the amplitude of accommodation. Optom Vis Sci 1944, 21: 345-363.CrossRefGoogle ... Sheard C. Zones of ocular comfort. Am J Optom 1930, 7: 9-25.CrossRefGoogle Scholar ... Neurons in the posterior interposed nucleus of the cerebellum related to vergence and accommodation. I. Steady-state ...
more infohttps://link.springer.com/article/10.1007/s12264-019-00455-9

Kapvay Side Effects in Detail - Drugs.comKapvay Side Effects in Detail - Drugs.com

Ocular. Rare (0.01% to 0.1%): Lacrimation decreased (dry eyes) Frequency not reported: Accommodation disorder, ocular burning, ...
more infohttps://www.drugs.com/sfx/kapvay-side-effects.html

Clonidine Side Effects in Detail - Drugs.comClonidine Side Effects in Detail - Drugs.com

Ocular. Rare (0.01% to 0.1%): Lacrimation decreased (dry eyes) Frequency not reported: Accommodation disorder, ocular burning, ...
more infohttps://www.drugs.com/sfx/clonidine-side-effects.html

Frontiers | Influence of the Plantar Cutaneous Information in Postural Regulation Depending on the Age and the Physical...Frontiers | Influence of the Plantar Cutaneous Information in Postural Regulation Depending on the Age and the Physical...

Comparison of saccadic eye movements and facility of ocular accommodation in female volleyball players and non-players. Scand. ... Quarck, G., and Denise, P. (2005). Vestibulo-ocular reflex characteristics in gymnasts. Sci. Mot. 55, 101-112. ...
more infohttps://www.frontiersin.org/articles/10.3389/fnhum.2016.00409/full

Meares Irlen SyndromeMeares Irlen Syndrome

Simmers, A.J., Gray, L.S. and Wilkins, A.J. (2001b). The influence of tinted lenses upon ocular accommodation. Vision Research ... Convergence is essential for near vision and is linked to accommodation by the so-called near-triad of accommodation, ... Accommodation is the increase in power of the eye or change of focus in order to clearly see objects at closer distances by ... The amplitude of accommodation is the maximum amount that the crystalline lens can accommodate. In young children this would be ...
more infohttps://migraine-dyslexia.com/meares-irlen-syndrome/

Accidentaly given flavospas tablet to 5 year child. Is it harmful?Accidentaly given flavospas tablet to 5 year child. Is it harmful?

Vision Problems: difficulty in ocular accommodation; blurred vision;. Mouth and Throat: dry mouth and throat; GI disturbances; ...
more infohttp://www.healthcaremagic.com/premiumquestions/Accidentaly-given-flavospas-tablet-to-5-year-child-Is-it-harmful/22207

Contact Lens SpectrumContact Lens Spectrum

The influence of tinted lenses upon ocular accommodation. Vision Res. 2001 Apr;41:1229-1238. ... Development of ocular drug delivery systems using molecularly imprinted soft contact lenses. Drug Dev Ind Pharm. 2014 Aug 12. [ ... Watten RG, Lie I, Birketvedt O. The influence of long-term visual near-work on accommodation and vergence: A field study. J Hum ... 3. Riley C, Young G, Chalmers R. Prevalence of ocular surface symptoms, signs, and uncomfortable hours of wear in contact lens ...
more infohttps://www.clspectrum.com/archive/references/2015/6_15%20Doc_235.html
  • 6. Berntsen DA, Sinnott LT, Mutti DO, Zadnik K. A randomized trial using progressive addition lenses to evaluate theories of myopia progression in children with a high lag of accommodation. (clspectrum.com)
  • Neck/shoulder discomfort due to visually demanding near work is influenced by previous neck pain, task duration, astigmatism, eye discomfort and accommodation. (hig.se)
  • Accommodation did not differ significantly from that in the control condition for the SC condition ( F = 0.32, p = .59), the aberration condition ( F = 4.9, p = .052), or the SC + aberration condition ( F = 1.4, p = .29). (arvojournals.org)
  • Accommodation is the process by which the vertebrate eye changes optical power to maintain a clear image or focus on an object as its distance varies. (wikipedia.org)
  • The age-related decline in accommodation occurs almost universally to less than 2 dioptres by the time a person reaches 45 to 50 years, by which time most of the population will have noticed a decrease in their ability to focus on close objects and hence require glasses for reading or bifocal lenses. (wikipedia.org)
  • Accommodation was recorded (100 Hz) in 20.48-s trials (6 per condition) in which participants viewed a low-contrast cross target followed by the monochromatic (548 nm) simulated disc target. (arvojournals.org)