Refractive refraction ocular. Medical search. Frequent questions

Theoretically, the OCT optical system is known to be affected by a magnification factor related to the eye attributable to axial length and refraction power difference from default values. (bmj.com)
As myopia has been identified as the most prevalent refractive error all over the world, 10 , 11 the correlation between myopia and axial length of the eye was extensively discussed, revealing a positive correlation between the absolute value of myopia and axial length. (dovepress.com)
We, therefore, determined the frequency of refractive errors in an ambulatory-care center and assessed the refractive status of patients using axial length measurements by optical interferometry2 and corneal power by automated keratometry. (paojournal.com)
The following data were obtained: age and gender, axial length, manifest refraction, type of refractive error, corneal power, refractive (by manifest refraction) and keratometric astigmatism (by IOL Master), and axis of astigmatism (refractive and keratometric). (paojournal.com)
The cornea, the lens, and the axial length of the eye are the main contributors to the eye's refraction capability. (medscape.com)
Ocular axial length (AL) is the major determinant of refraction and thus of myopia and hyperopia. (cardiff.ac.uk)
Measures of axial length and ocular HOAs under cycloplegia were obtained annually over a two-year period from 137 subjects aged 8.8 ± 1.4 years with mean spherical equivalent refraction of-2.04 ± 2.38 D. A significant negative association was observed between the RMS of total HOAs and axial eye growth (P = 0.03), after adjusting for other significant predictors of axial length including age, sex and refractive error. (edu.hk)
Preoperative estimation of postoperative intraocular lens (IOL) position, postoperative refraction determination, and preoperative axial length (AL) measurement were the largest contributors of error (35%, 27%, and 17%, respectively), with a mean absolute error (MAE) of 0.6 diopter (D) for an eye of average dimensions. (nih.gov)

The types of refractive errors were classified as follows: myopia with SE ≥ -0.50D, hyperopia with SE ≥ + 0.50D, and emmetropia with SE ± 0.25D. Eyes with and without astigmatism were noted. (paojournal.com)
Myopia (nearsightedness), hyperopia (farsightedness), and astigmatism are the three main types of refractive errors. (eyelaboptometry.com)
The Contoura LASIK is FDA approved and can be used for correction for all types of refractive errors. (lasik-treatment.com)

To determine the distribution of ocular residual astigmatism (ORA) in astigmatic eyes and the influence on the anterior corneal (ACA) and refractive astigmatism (RA). (nature.com)
The magnitude of ocular residual astigmatism was relatively small in children's astigmatic eyes. (nature.com)
Twenty three years ago, based on the term residual astigmatism, Alpins 2 proposed the parameter ocular residual astigmatism (ORA) to express the discrepancy between corneal and refractive astigmatism (RA). (nature.com)
RA is the total ocular astigmatism obtained by phoropter or retinoscopy. (nature.com)
Astigmatism is a common refractive anomaly that results in reduced visual acuity and causes various symptoms like glare, monocular diplopia, asthenopia, and distortion 8 . (nature.com)
The 3 specific ocular and vision-related conditions that accounted for the most medical encounters (i.e., myopia, astigmatism, and acute conjunctivitis) accounted for almost one-half (47.7%) of all ocular and vision-related medical encounters overall. (health.mil)
We also correlated them with demographic and other ophthalmic variables, and compared refractive and keratometric astigmatism. (paojournal.com)
The axis of astigmatism was determined by manifest refraction (MR-axis) and by the axis of the flattest K as measured by the IOL Master (IM-axis). (paojournal.com)
Concepts of corneal refractive surgery, such as keratectomy, keratotomy, and thermokeratoplasty, were first described in 1898 by Lans who published a set of experiments that focused on treating astigmatism in rabbits. (medscape.com)
Since its introduction, LASIK has been associated with various complications, specifically when performed on eyes with decreased corneal thickness, irregular astigmatism, dryness, preexisting ocular surface disease, or glaucoma, to the point where several of these entities have become relative contraindications to performing LASIK. (medscape.com)
No. 2: Do you analyze astigmatism using both refractive and corneal parameters? (crstoday.com)
This mini-computer makes astigmatism investigation in one eye only The ASSORT outcome review programming may be ocular residual bought for bunch examinations. (body-tips.com)
In a future excimer lateral treatment strategy, this online extension machine strengthens corneal astigmatism like the refractive chamber. (body-tips.com)
Ocular Astigmatism Calculation (ORA - a vector comparison between a corneal astigmatism and a dioptre-communicated refractive ocular residual chamber in the corneal plane). (body-tips.com)
Welcome to the Ocular Astigmatism Calculator (ORA) of the ASSORT. (body-tips.com)

Differential gene expression was observed for these loci in minus-lens-induced myopia mouse experiments and human ocular tissues. (cardiff.ac.uk)
While refractive surgery may eliminate a patient's myopic refraction once it stabilizes, it does not eliminate the pathological threat associated with high myopia. (shameemkhanod.com)

Organic amblyopia refers to irreversible amblyopia caused by ocular pathology that will limit vision improvement. (medscape.com)
In this study, researchers aimed to compare the epidemiological and ocular findings of twin children in comparison with non-twin age-matched individuals as controls and found that amblyopia, strabismus and female sex are significantly more common in twins. (reviewofoptometry.com)
Therefore, it is important to check their refractive error, amblyopia and strabismus to prevent their further complications. (reviewofoptometry.com)
The association between moderate hyperopia and the presence of ocular conditions such as amblyopia or strabismus has been documented previously for young children. (entokey.com)

Ocular dominance is an important consideration in predicting patient satisfaction with monovision correction in cataract surgery refractive surgery, also laser eye surgery, and contact lens wear. (wikipedia.org)
However, during patients' longitudinal follow-ups, clinicians may encounter various circumstances where patients' refraction powers may be changed either temporarily, owing to the wearing of contact lenses, or permanently, owing to surgery that induces refraction power change (laser-assisted in situ keratomileusis (LASIK), laser-assisted subepithelial keratectomy (LASEK), phakic intraocular lens implantation, or cataract surgery, etc). (bmj.com)
Thanks to the introductions of laser cataract surgery, advanced-technology IOLs, and options for surgical astigmatic correction, modern cataract surgery has evolved from a visual restorative surgery to refractive surgery. (crstodayeurope.com)
The accuracy, repeatability, and consistency of modern cataract surgery have transformed patient expectations and increased patients' awareness of postoperative refractive side effects. (crstodayeurope.com)
In addition to blindness due to naturally occurring high refractive error, inadequate refractive correction of aphakia after cataract surgery is also a significant cause of blindness in developing countries. (studyres.com)
To identify and quantify sources of error in the refractive outcome of cataract surgery. (nih.gov)
Premium Diagnostics Hospital offers a number of ophthalmic procedures, which include refractive eye-sight exams and laser cataract surgery. (dusthouse.org)

Among a random cluster sample of 1892 children in Xichang, China, subjects with an uncorrected acuity of 6/12 or less in either eye (n = 984) and a 25% sample of children with normal vision (n = 248) underwent measurement of refractive error. (nih.gov)
Region-specific Relationships Between Refractive Error and Ciliary Muscle Thickness in Children (2013). (osu.edu)
In general, the conditions that accounted for the most medical encounters were predominantly refractive error and related disorders and conjunctival disorders. (health.mil)
Today, identifiable causes of dissatisfaction following presbyopia-correcting IOL implantation are most commonly due to residual refractive error and dry eye disease (DED). (crstodayeurope.com)
As presbyopia-correcting IOLs are implanted with more frequency and the number of cataract surgeries performed annually grows, residual refractive error is becoming more common. (crstodayeurope.com)
Because his quality of vision does not improve with refraction, an enhancement to correct any residual refractive error is not an option. (crstodayeurope.com)
To find out the correlation between myopic refractive error, corneal power and central corneal thickness (CCT) in the adult Egyptian population. (dovepress.com)
Among the myopic adult Egyptian population, the greater the myopic error measured, the steeper the cornea, with a weak positive correlation between refractive error and corneal power. (dovepress.com)
The correlation between refractive error and corneal parameters has been previously studied in different regions and populations. (dovepress.com)
3 , 14-16 The purpose of this work is to find out if there is any correlation between corneal parameters (namely, central corneal thickness and corneal power) and the refractive error in the myopic adult Egyptian population. (dovepress.com)
39%), and that "reversing or treating these refractive errors greatly decreased the number of subjects with visual disability".1 Awareness of the frequency of refractive errors is, therefore, a crucial step in the Vision 2020's goal of eliminating refractive-error-related visual disability. (paojournal.com)
Laser-assisted subepithelial keratectomy (LASEK) is a laser surgical procedure for the correction of refractive error. (medscape.com)
Refractive error blindness Rakhi Dandona1 & Lalit Dandona2 Recent data suggest that a large number of people are blind in different parts of the world due to high refractive error because they are not using appropriate refractive correction. (studyres.com)
Refractive error as a cause of blindness has been recognized only recently with the increasing use of presenting visual acuity for defining blindness. (studyres.com)
Blindness due to refractive error in any population suggests that eye care services in general in that population are inadequate since treatment of refractive error is perhaps the simplest and most effective form of eye care. (studyres.com)
Strategies such as vision screening programmes need to be implemented on a large scale to detect individuals suffering from refractive error blindness. (studyres.com)
Also adequate infrastructure has to be developed in underserved areas of the world to facilitate the logistics of providing affordable reasonable-quality spectacles to individuals suffering from refractive error blindness. (studyres.com)
Long-term success in reducing refractive error blindness worldwide will require attention to these issues within the context of comprehensive approaches to reduce all causes of avoidable blindness. (studyres.com)
Introduction Refractive error as a cause of blindness has not received much attention because many definitions of blindness have been based on best-corrected distance visual acuity, including the definition used in the International Statistical Classification of Diseases and Related Health Problems (1). (studyres.com)
However, in many parts of the world refractive error would become the second largest cause of treatable blindness after cataract if blindness were defined on the basis of presenting distance visual acuity (2-10). (studyres.com)
Refractive error is also one of the most common causes of visual impairment (3-5, 9-13). (studyres.com)
Because of the increasing realization of the enormous need for correction of refractive error worldwide, this condition has been considered one of the priorities of the recently launched global initiative for the elimination of avoidable blindness: VISION 2020 - The Right to Sight (14, 15). (studyres.com)
For the most part, refractive error can be easily corrected with spectacles, which makes it imperative that effective strategies be developed to eliminate this easily treatable cause of blindness. (studyres.com)
This review presents a summary of the current and likely future issues related to blindness due to refractive error. (studyres.com)
The latter definition permits assessment of blindness due to refractive error, whereas the former does not. (studyres.com)
Although a large amount of data are available on the prevalence of blindness in different parts of the world (16), data on the prevalence of blindness due to refractive error are not readily available because the presenting distance visual acuity definition is not always used. (studyres.com)
A refractive error of +1.00 in both eyes was found on cycloplegic refraction. (medscape.com)
The most common type of vision problem is a refractive error. (eyelaboptometry.com)
Over 150 million Americans have a refractive error, but many are unaware that they could see better. (eyelaboptometry.com)
An optometrist or ophthalmologist will perform a refraction test to determine if you have a refractive error in your vision that causes you to be nearsighted , farsighted, or astigmatic. (eyelaboptometry.com)
Refraction tests are performed by eye doctors to determine the strength of the prescription you need for glasses or contact lenses to address your specific refractive error and allow you to see clearly. (eyelaboptometry.com)
In particular, accurate measurement of corneal refractive power determines the quality of postoperative visual acuity and is an indicator of residual refractive error. (ekjo.org)
Down syndrome (DS) is associated with ocular and cognitive sequelae, which both have the potential to influence clinical measures of refractive error. (amplifyeye.care)
The spherical refractive error was more hyperopic in twins compared with non-twins. (reviewofoptometry.com)
Hyperopia is the most frequently occurring refractive error in young children, with a prevalence in preschool children of up to 12% for ≥+3.00 diopters (D), depending on the population and definition of hyperopia used. (entokey.com)
A great variety of studies evaluating the effect of some therapeutic approaches, the outcomes with different optical aids, the distribution of refractive errors in different areas of the world or how to evaluate the impact of refractive error in some vision-related abilities have been conducted and reported since many years ago. (docksci.com)
The eye undergoes many rapid changes during childhood, while maintaining a refractive error close to emmetropia during the whole process. (volantis.cc)
A visit with your Optometrist will help you find out if you have a refractive error. (realeyesoptometry.com)
Refractive error occurs when the shape of your eye prevents light from focusing correctly on your retina. (realeyesoptometry.com)
Refractive Error Types: Are You Impacted? (realeyesoptometry.com)
The type of surgery and its outcome depend on your refractive error, corneal thickness, ocular health and other factors. (realeyesoptometry.com)
This will determine your refractive error. (realeyesoptometry.com)
The distance power of the spectacle lenses will be power-matched to the participants myopic refractive error. (who.int)
There is still controversy about the effec- correction of the refractive error, the con- tiveness of contrast sensitivity as a screen- trast sensitivity was evaluated with a Cam- ing tool for diabetic retinopathy [12-17]. (who.int)
Of these cases, 11 million are attributable to refractive error. (cdc.gov)

It excluded patients with less than 250 µm of residual posterior corneal thickness, ocular surface disease, relevant systemic diseases, or large differences between manifest and cycloplegic refractions. (crstoday.com)
Pupils, ocular motility, anterior segment, and posterior segment exams were normal, with a cup-to-disc ratio of 0.1 in both eyes. (medscape.com)
Pentacam HR (Oculus, Wetzlar, Germany), using the rotating Scheimpflug camera analysis system, can evaluate the entire ocular anterior segment from the anterior corneal surface to the posterior lens surface. (ekjo.org)
All participants underwent a comprehensive ophthalmic examination including measurement of BCVA, cycloplegic refraction, ocular deviation and strabismus, as well as anterior and posterior ophthalmic examinations. (reviewofoptometry.com)
Ocular imaging studies such as ultrasonography, computed tomography (CT) scanning, or magnetic resonance imaging (MRI) are requested when a significant posterior pole pathology is suspected and an adequate view of the back of the eye is obscured by a dense cataract. (medscape.com)

This study's aim was to evaluate the effect of refraction power on the measurement of the RNFL thickness using spectral-domain OCT. (bmj.com)
Methods OCT scans to measure RNFL thickness were repeated in 15 cycloplegic eyes of 15 participants, while different refraction powers were induced by wearing soft contact lenses of eight different dioptres (−6 to +8). (bmj.com)
Conclusions In spectral-domain OCT, RNFL thickness was underestimated in eyes with increasing negative refraction power and overestimated with increasing positive refraction power. (bmj.com)
They followed principles formulated by Krumeich using a microkeratome to remove a portion of the cornea followed by a second plano cut, the thickness and diameter of which established refractive change. (medscape.com)
Precise measurements of the ocular anterior segment, including corneal refractive power, corneal thickness, and anterior chamber depth, are important factors for cataract and corneal refractive surgery, as well as postoperative evaluation. (ekjo.org)

These numerical crunching systems allow for astigmatic checking of each eye, bunch tests may be achieved by ocular residual purchasing of ASSORT or VECTRAK programming. (body-tips.com)
The use of this adding machine for an illustrative ocular residual delivery is recommended. (body-tips.com)

Definition of blindness Ref. No. 00-1034 Blindness is defined either in terms of best-corrected distance visual acuity (the most appropriate refractive correction) or presenting distance visual acuity (the individual's current refractive correction) in the better eye. (studyres.com)
The CONTOURA Program uses a sophisticated imaging device which helps capture 22,000 points to customise treatment algorithm for the correction of refractive errors in each eye. (lasik-treatment.com)
The Quality of Life Impact of Refractive Correction (QIRC) Questionnaire: development and validation. (docksci.com)
At the Asia Pacific Association of Cataract and refraction Refractive Surgeons in July 2013, Dr Natasha Lim Eye Centre was accredited Centre of Excellence for the use of LENTIS multi-focal intra-ocular lens implant for the correction of presbyopia. (mediaonemarketing.com.sg)

Locally, there are few published reports on the prevalence of refractive errors. (paojournal.com)
The evaluation of the distribution of refractive errors in some distant areas such as Puerto Rico or Qassim Province (Saudi Arabia) as well as the study of the prevalence of asymptomatic ocular conditions in subjects with refractive-based symptoms in a Canadian population are shown in the current issue. (docksci.com)

The current report used an ocular and vision disease classification system and several health care burden measures to quantify the impacts of various ocular and vision-related illnesses and injuries among active component service members of the U.S. Armed Forces during 2018. (health.mil)
Studies have shown that genetic and environmental factors have substantial roles in child development and manifestation of various ocular features, as well as congenital anomalies, particularly in monozygotic twins. (reviewofoptometry.com)
Dry eye disease (DED) is the most common multifactorial annoying ocular surface disorder, of various ocular symptoms, ranging from eye discomfort, dryness, itching, irritation, and foreign body sensation up to noticeable visual disturbance. (bijojournal.org)

If you wear prescription glasses or contact lenses , you should have a refraction test performed every year. (eyelaboptometry.com)
Refraction is deﬁned as the act of determining the focal condition (emmetropia or various ametropias) of the eye and its corrections by optical devices, usually spectacles or contact lenses.1 It is one of the most important activities of the clinical work of optometrists and an indispensable variable to be considered in studies on vision. (docksci.com)
If you experience blurred vision or just have difficulty seeing certain distances, your optometrist can prescribe eyeglasses, contact lenses, or recommend refractive surgery to help you see clearly. (realeyesoptometry.com)
If blurred vision is impacting your life, or you want to stop using contact lenses or glasses, refractive eye surgery may be right for you. (realeyesoptometry.com)
all were free from any ocular or systemic diseases and not using contact lenses. (bijojournal.org)
The goal of refractive surgery is to decrease dependence on eyeglasses or contact lenses. (msdmanuals.com)
Ideal candidates for refractive surgery are healthy people aged 18 and older with healthy eyes who are not satisfied wearing eyeglasses or contact lenses. (msdmanuals.com)

This study aims to determine the influence of spherical refractive errors (REs) on the tear volume and DED. (bijojournal.org)

Refraction fails to improve the quality of vision in the patient's right eye. (crstodayeurope.com)
Documentation of the patient's family ocular and systemic health history. (berkeley.edu)
Preoperatively, I determine the astigmatic target based on the patient's clinical refraction and anterior corneal topography with the Sirius topographer (CSO). (crstoday.com)
With the patient's first eye, I try to understand the total behavior of the eye in terms of variables other than refraction-especially coma aberration. (crstoday.com)

The measurement conditions differ from the viewpoint of the presence or absence of one eye occlusion in the two tests: ocular structural imaging and visual field testing. (bmj.com)
We evaluated whether or not a difference exists in the ocular cyclodeviation due to the difference in the measurement condition using an objective cyclic angle and found that there was no significant change. (bmj.com)
Also we know that patients who have had refractive surgeries such as LASIK or those patients with Keratoconus will have abnormal Goldmann measurements, Corneal hysteresis is a way to take those factors out to get a more accurate measurement. (solinskyeyecare.com)
Measurement of the index of refraction (the ratio of the velocity of light or other radiation in the first of two media to its velocity in the second as it passes from one into the other). (bvsalud.org)

It is more difficult to treat compared to other refractive errors. (nature.com)
With the advent of laser techniques, lots of devices were developed to correct the astigmatic refractive errors. (nature.com)
Refractive errors accounted for the majority of eye-related encounters among service members. (health.mil)
Next, treat anisometropia and refractive errors. (medscape.com)
Refractive errors are common eye disorders of public health importance worldwide. (cardiff.ac.uk)
These refractive errors can cause blurry vision at various distances. (eyelaboptometry.com)
Refractive errors occur when the shape of your eye does not correctly bend light, resulting in a blurred image. (eyelaboptometry.com)
In addition to treating the routine refractive errors, the CONTOURA technology also has the ability to correct any inherent aberrations which may be present in the eye known as higher order aberrations. (lasik-treatment.com)
In agreement with this, Optometry research must deepen their knowledge on refractive changes in different ocular conditions as well as on new options to compensate refractive errors. (docksci.com)
Global magnitude of visual impairment caused by uncorrected refractive errors in 2004. (docksci.com)
Refractive errors are a very common eye disorder that causes your eyes to not clearly focus on images. (realeyesoptometry.com)

An AcrySof PanOptix trifocal toric IOL sitting behind a cornea that was previously flattened by LASIK for what looks like a moderate to high myopic refraction is less likely to deliver optimal quality of vision. (crstodayeurope.com)
Refractive eye surgery involves reshaping the cornea (front surface of the eye) to correct its curvature. (realeyesoptometry.com)
Corneal refractive surgery alters the curvature of the cornea to focus light more precisely on the retina. (msdmanuals.com)
Any pre-existing ocular irritation, injury, or condition (including infection or disease) of the cornea, conjunctiva or eyelids that would cause vision fluctuations. (who.int)

These changes occur later in pregnancy and may produce temporary alterations in refraction, making pregnancy a contraindication to refractive eye surgery. (aao.org)
Refractive cataract surgeons should approach refractive cataract patients in a systematic way, both before and after surgery. (crstodayeurope.com)
QOL was evaluated using the Refractive Status and Vision Profile (RSVP), a 42-item validated questionnaire for refractive surgery with subcategories in driving, visual function, perception, visual symptoms, problems with corrective lenses, and expectations. (crstoday.com)
The field of refractive surgery has evolved to offer patients a plethora of surgical options for spectacle independence. (crstoday.com)
Given the elective nature of refractive surgery, comparisons of procedures must include both clinical measures of efficacy and patient-reported outcomes. (crstoday.com)
A 63-year-old man is referred for a refractive surgery evaluation. (crstodayeurope.com)
Five hundred microns has been accepted as a cut-off value for safe refractive surgery. (dovepress.com)
Refractive surgery, as it is known today, was not realized until 1966 when Pureskin first appreciated its potential with the demonstration that refractive changes could be made by removing central tissue underneath a corneal flap. (medscape.com)
Then, if the mismatching calls for an intervention, I apply the Alpins Statistical System for Ophthalmic Refractive Surgery Techniques (ASSORT) program. (crstoday.com)
In the new era of intraocular lens techniques and the advent of laser refractive surgery, accurate measurements of anterior ocular biometry and considering them together are becoming much more important. (ekjo.org)
The most recent advancement in the field of laser refractive surgery is the advent of CONTOURA LASIK which is a truly customised laser treatment procedure according to your eye shape and colour. (lasik-treatment.com)
Likewise, the refractive change as well as other related changes after corneal surgery are discussed in two papers, one about seasonal changes in the outcome after LASIK surgery and another review paper about the outcome of corneal collagen crosslinking. (docksci.com)
To prepare to get surgery, individuals may experience a comprehensive eye exam, ocular ultrasound, and whole-eye assessment. (dusthouse.org)
Refractive Surgery: Is It Right For You? (realeyesoptometry.com)
Refractive surgery could mean no more corrective lenses but it may not be right for everyone. (realeyesoptometry.com)
Do You Need Refractive Surgery? (realeyesoptometry.com)
If you experience any of the following, refractive eye surgery could be a method for correcting or improving your vision. (realeyesoptometry.com)
Mild to moderate nearsightedness tends to have the most success with refractive surgery. (realeyesoptometry.com)
A refractive surgery evaluation is advised to determine which method is best for our patients. (realeyesoptometry.com)
This will determine refractive surgery eligibility. (realeyesoptometry.com)
Refraction should be stable for at least 1 year prior to surgery. (msdmanuals.com)
chance of vision loss is 1% if the patient is considered a good candidate for refractive surgery preoperatively. (msdmanuals.com)
Previous corneal refractive surgery. (who.int)
Visual acuity charts only measure the eases, history of previous ocular surgery high frequency component of the contrast or photocoagulation and systemic diseases sensitivity function and are markedly af- other than diabetes. (who.int)

Investigators found that bilateral wavefront-guided LASIK provided excellent objective outcomes such as visual acuity, refraction, and aberrometry as well as high patient satisfaction and quality of life, as measured by the Refractive Status and Vision Profile questionnaire. (crstoday.com)
The investigators found that bilateral wavefront-guided LASIK produced excellent visual acuity, refractive, and aberrometric outcomes. (crstoday.com)
Thinner corneas are at risk for ectasia, haze and less predictable refractive outcomes. (dovepress.com)
Means and standard deviations (SDs) of parameters that influence refractive outcomes were taken or derived from the published literature to the extent available. (nih.gov)

There was a range of refractive shift of +0.25D to -5.25D with a mean myopic shift of -1.51D following membranectomy. (bvsalud.org)

The most common (classic or typical features) include corneal clouding, ocular hypertension and glaucoma, retinopathy and optic disc involvement (optic disc swelling or atrophy). (eyewiki.org)
Aside from ocular diseases such as glaucoma and macular degeneration, many systemic diseases (including diabetes, hypertension, high cholesterol, and more) can be identified early through a comprehensive eye health evaluation? (unioneyeworks.net)
Thus, a reliable, The exclusion criteria were: significant quick and inexpensive test for detection of ocular diseases beside diabetic retinopathy, early dysfunction is of vital importance to including cataract, glaucoma, and optic primary and shared care programmes. (who.int)
Afterwards, the best corrected ocular diseases, including optic neuritis and visual acuity was determined on a subjec- glaucoma, where contrast sensitivity can be tive basis. (who.int)

We'll get a comprehensive picture of your ocular health by performing noninvasive tests and looking for eye diseases, irregularities, and changes in your vision. (eyelaboptometry.com)
Any systemic disease that adversely affects ocular health e.g., diabetes, Graves' disease, and auto immune diseases such as ankylosing spondylitis, multiple sclerosis, Sjogrens syndrome, and systemic lupus erythematosus. (who.int)

It is therefore important to stabilize the ocular surface before biometry is performed. (crstodayeurope.com)
This is a retrospective study involving 1,332 eyes of 666 consecutive patients who underwent refractive or cataract screening and optical biometry (IOL Master, Carl Zeiss Meditec, Jena, Germany) measurements from March to October 2008. (paojournal.com)
Patients who could not physically undergo optical biometry or manifest refraction were excluded. (paojournal.com)
To measure anterior ocular biometry, Placido disk reflection, slit-scanning tomography, a rotating Scheimpflug camera, and anterior segmental optical coherence tomography are mainly used. (ekjo.org)

The consequence of the postoperative toxic embedding revolution due to a refractive shock can be established. (body-tips.com)
Improvement in refractive outcome requires better methods for predicting the postoperative IOL position. (nih.gov)

A physician in Premium Diagnostics will perform a comprehensive eyeball exam including a refraction and corneal topography. (dusthouse.org)

In our clinic, we perform Placido-ring topography on all cataract patients to evaluate the ocular surface, and we use objective and subjective tests such as patient questionnaires, topography, slit-lamp examination, and point-of-care testing for MMP-9 and osmolarity to identify DED. (crstodayeurope.com)
Monocular and binocular subjective refraction. (docksci.com)
o Achieve at least 0.10 logMAR in each eye at 6 m and binocularly at 40 cm while wearing subjective distance refraction. (who.int)

It is an objective test of ocular dominance. (wikipedia.org)
This study used objective measures and one of the first validated refractive quality-of-life questionnaires to demonstrate that bilateral wavefront-guided LASIK yielded high-quality vision. (crstoday.com)
We aimed to assess the objective ocular cyclodeviation between monocular occlusion and binocular conditions using fundus photography. (bmj.com)
In the current study, comparing three autorefraction readings, median total dioptric difference with autorefraction in DS was 2.8 times the levels observed in controls, indicating greater potential uncertainty in objective measures of refraction for this population. (amplifyeye.care)

It requires good pre-operative planning by expert refractive surgeons. (lasik-treatment.com)

The manifest refraction of each patient using the retinoscopy technique for best-corrected visual acuity was retrieved from the clinical record. (paojournal.com)
Optometrists must continue considering in the clinical practice refraction as a crucial tool to evaluate the results of different optometric treatment approaches, to deﬁne the most adequate protocol to follow, and to diagnose some eye conditions. (docksci.com)
Borish's clinical refraction. (docksci.com)
Currently enrolled in another ocular clinical trial. (who.int)

20 and 64 years, the ocular complications of diabetes are preventable and treatable in the early stages of the disease [1-3]. (who.int)

His manifest refraction is plano OS and -2.25 +1.25 x 82º OD. (crstodayeurope.com)
These were compared with the manifest refraction (retinoscopy) of the patients. (paojournal.com)
Manifest refraction was measured using retinoscopy where sphere, cylinder (measured in negative cylinders), and axis were noted. (paojournal.com)

Changes in morphology and the refraction index of lenses with ageing also result in refraction power change. (bmj.com)
Have ocular health findings considered to be "normal" and which would not prevent the participant from wearing spectacle lenses. (who.int)

Studies assessing the effects of Nd:YAG laser capsulotomy on anterior chamber parameters, including anterior chamber depth (ACD), anterior chamber angle (ACA), and the refractive index, have yielded conflicting results [ 7 , 9 , 10 , 11 , 12 , 13 ]. (ekjo.org)

This retrospective longitudinal analysis aimed to investigate the association between ocular higherorder aberrations (HOAs) and axial eye growth in Hong Kong children. (edu.hk)

In patients with ocular hypertension, this decrease may be even greater. (aao.org)

Laser in situ keratomileusis (LASIK), since its introduction by Pallikaris and his team in 1990, 1 has become the most frequently performed corneal refractive procedure all over the world, with millions of LASIK procedures completed to date. (dovepress.com)

To evaluate their influence on refraction, thick-lens ray tracing that allowed for asphericity was used. (nih.gov)

Documentation regarding the past and present ocular history which includes present spectacle/contact lens Rxs with all parameters. (berkeley.edu)
The numerical partial derivative of each parameter with respect to spectacle refraction was calculated. (nih.gov)

The ocular adnexa may be affected by chloasma, a hormonally mediated increase in pigmentation around the eyes and cheeks, which is common during pregnancy. (aao.org)

Other ocular abnormalities seen in preeclampsia and eclampsia include white-centered retinal hemorrhages, papillophlebitis, Elschnig spots, macular edema, retinal pigment epithelial (RPE) lesions, retinal artery and vein occlusion, optic neuritis, optic atrophy, and ischemic optic neuropathy. (aao.org)

We also examined the direction of ocular rotation under the binocular condition regarding the monocular condition. (bmj.com)

Mirror-image twin (MIT) was defined according to the laterality of symmetrical ocular characteristics of twins. (reviewofoptometry.com)

A full eye examination must be performed to rule out ocular pathology. (medscape.com)
A complete ocular examination must be performed, beginning with visual acuity for near and far distances. (medscape.com)

[2] Ocular pathology is common in all types of MPS, but its frequency, severity and ocular localization vary according to the MPS subtype. (eyewiki.org)

This curvature and non-ideal refraction of light causes objects to look blurry, wavy or distorted. (realeyesoptometry.com)

When determining patient candidacy for a multifocal IOL, it is imperative to consider their lifestyle, examine them for ocular surface disease, and assess their optical quality. (crstodayeurope.com)
Optimization of the ocular surface is essential before surgical intervention. (crstodayeurope.com)

Ocular dominance, sometimes called eye preference or eyedness, is the tendency to prefer visual input from one eye to the other. (wikipedia.org)
Optic nerve conditions and visual discomfort/disturbances accounted for more than one-quarter (30.1%) of all ocular and vision-related hospital bed days. (health.mil)
Effective prioritization of the magnitude and burden of ocular and visual conditions is essential to inform the targets for prevention, allocation of resources, training objectives, and research goals. (health.mil)
Financial costs of ocular injuries and visual dysfunction resulting from traumatic brain injury have been recently reported and are significant. (health.mil)
Ocular involvement is frequent and may lead to severe visual impairment. (eyewiki.org)
Ocular features in MPSs are very frequent, many of those represent an early manifestation of MPS and result in significant visual impairment. (eyewiki.org)
Aside from correcting problems with visual accommodation, a comprehensive eye examination includes a thorough review of medical and ocular history, as well as evaluating the health of your eyes. (unioneyeworks.net)
11% of adults with diabetes have a visual acuity of less than 20/40, and 3.8% (one-third of the 11%) of these cases cannot be corrected with refraction. (cdc.gov)

Newer-generation IOLs may improve vision by strengthening refractive accurate. (dusthouse.org)

Most patients also have gastrointestinal and mild ocular abnormalities, as well as behavioral problems (summary by DeSanto et al. (nih.gov)

Anatomy22

Organisms5

Diseases53

Chemicals and Drugs7

Analytical, Diagnostic and Therapeutic Techniques and Equipment56

Psychiatry and Psychology8

Phenomena and Processes16

Disciplines and Occupations4

Technology, Industry, Agriculture2

Information Science1

Named Groups5

Health Care10

Geographicals5

Axial length8

Types of refractive errors3

Astigmatism15

Myopia2

Amblyopia4

Cataract surgery7

Error45

Posterior5

Thickness5

Residual2

Correction4

Prevalence2

Various ocular3

Contact lenses7

Spherical1

Patient's4

Measurement4

Errors11

Cornea4

Surgery24

Outcomes4

Myopic1

Glaucoma4

Diseases2

Biometry4

Postoperative2

Corneal topography1

Subjective3

Objective4

Surgeons1

Clinical4

Complications1

Manifest3

Lenses2

Anterior1

Aberrations1

Hypertension1

LASIK1

Evaluate1

Spectacle2

Adnexa1

Optic Neuritis1

Binocular1

Symmetrical1

Examination must be performed2

Pathology1

Curvature1

SURFACE2

Visual8

IOLs1

Abnormalities1