Corneal Pachymetry: Measurement of the thickness of the CORNEA.Corneal Topography: The measurement of curvature and shape of the anterior surface of the cornea using techniques such as keratometry, keratoscopy, photokeratoscopy, profile photography, computer-assisted image processing and videokeratography. This measurement is often applied in the fitting of contact lenses and in diagnosing corneal diseases or corneal changes including keratoconus, which occur after keratotomy and keratoplasty.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)Diagnostic Techniques, Ophthalmological: Methods and procedures for the diagnosis of diseases of the eye or of vision disorders.Keratomileusis, Laser In Situ: A surgical procedure to correct MYOPIA by CORNEAL STROMA subtraction. It involves the use of a microkeratome to make a lamellar dissection of the CORNEA creating a flap with intact CORNEAL EPITHELIUM. After the flap is lifted, the underlying midstroma is reshaped with an EXCIMER LASER and the flap is returned to its original position.Keratoconus: A noninflammatory, usually bilateral protrusion of the cornea, the apex being displaced downward and nasally. It occurs most commonly in females at about puberty. The cause is unknown but hereditary factors may play a role. The -conus refers to the cone shape of the corneal protrusion. (From Dorland, 27th ed)Corneal Edema: An excessive amount of fluid in the cornea due to damage of the epithelium or endothelium causing decreased visual acuity.Lasers, Excimer: Gas lasers with excited dimers (i.e., excimers) as the active medium. The most commonly used are rare gas monohalides (e.g., argon fluoride, xenon chloride). Their principal emission wavelengths are in the ultraviolet range and depend on the monohalide used (e.g., 193 nm for ArF, 308 nm for Xe Cl). These lasers are operated in pulsed and Q-switched modes and used in photoablative decomposition involving actual removal of tissue. (UMDNS, 2005)Tomography, Optical Coherence: An imaging method using LASERS that is used for mapping subsurface structure. When a reflective site in the sample is at the same optical path length (coherence) as the reference mirror, the detector observes interference fringes.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)Refractive Surgical Procedures: Surgical procedures employed to correct REFRACTIVE ERRORS such as MYOPIA; HYPEROPIA; or ASTIGMATISM. These may involve altering the curvature of the CORNEA; removal or replacement of the CRYSTALLINE LENS; or modification of the SCLERA to change the axial length of the eye.Ocular Hypertension: A condition in which the intraocular pressure is elevated above normal and which may lead to glaucoma.Intraocular Pressure: The pressure of the fluids in the eye.Glaucoma, Open-Angle: Glaucoma in which the angle of the anterior chamber is open and the trabecular meshwork does not encroach on the base of the iris.Tonometry, Ocular: Measurement of ocular tension (INTRAOCULAR PRESSURE) with a tonometer. (Cline, et al., Dictionary of Visual Science, 4th ed)Periodicals as Topic: A publication issued at stated, more or less regular, intervals.Access to Information: Individual's rights to obtain and use information collected or generated by others.Journal Impact Factor: A quantitative measure of the frequency on average with which articles in a journal have been cited in a given period of time.Publishing: "The business or profession of the commercial production and issuance of literature" (Webster's 3d). It includes the publisher, publication processes, editing and editors. Production may be by conventional printing methods or by electronic publishing.Observer Variation: The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).Reproducibility of Results: The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.Pathology: A specialty concerned with the nature and cause of disease as expressed by changes in cellular or tissue structure and function caused by the disease process.Privacy: The state of being free from intrusion or disturbance in one's private life or affairs. (Random House Unabridged Dictionary, 2d ed, 1993)Confidentiality: The privacy of information and its protection against unauthorized disclosure.Computer Security: Protective measures against unauthorized access to or interference with computer operating systems, telecommunications, or data structures, especially the modification, deletion, destruction, or release of data in computers. It includes methods of forestalling interference by computer viruses or so-called computer hackers aiming to compromise stored data.Informed Consent: Voluntary authorization, by a patient or research subject, with full comprehension of the risks involved, for diagnostic or investigative procedures, and for medical and surgical treatment.Genetic Privacy: The protection of genetic information about an individual, family, or population group, from unauthorized disclosure.Internet: A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.Keratectomy, Subepithelial, Laser-Assisted: A surgical technique to correct REFRACTIVE ERRORS of the EYE, such as MYOPIA and ASTIGMATISM. In this method, a flap of CORNEAL EPITHELIUM is created by exposure of the area to dilute alcohol. The flap is lifted and then replaced after laser ablation of the subepithelial CORNEA.Photorefractive Keratectomy: A type of refractive surgery of the CORNEA to correct MYOPIA and ASTIGMATISM. An EXCIMER LASER is used directly on the surface of the EYE to remove some of the CORNEAL EPITHELIUM thus reshaping the anterior curvature of the cornea.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.Astigmatism: Unequal curvature of the refractive surfaces of the eye. Thus a point source of light cannot be brought to a point focus on the retina but is spread over a more or less diffuse area. This results from the radius of curvature in one plane being longer or shorter than the radius at right angles to it. (Dorland, 27th ed)Hyperopia: A refractive error in which rays of light entering the eye parallel to the optic axis are brought to a focus behind the retina, as a result of the eyeball being too short from front to back. It is also called farsightedness because the near point is more distant than it is in emmetropia with an equal amplitude of accommodation. (Dorland, 27th ed)Refractive Errors: Deviations from the average or standard indices of refraction of the eye through its dioptric or refractive apparatus.Migraine Disorders: A class of disabling primary headache disorders, characterized by recurrent unilateral pulsatile headaches. The two major subtypes are common migraine (without aura) and classic migraine (with aura or neurological symptoms). (International Classification of Headache Disorders, 2nd ed. Cephalalgia 2004: suppl 1)Migraine without Aura: Recurrent unilateral pulsatile headaches, not preceded or accompanied by an aura, in attacks lasting 4-72 hours. It is characterized by PAIN of moderate to severe intensity; aggravated by physical activity; and associated with NAUSEA and / or PHOTOPHOBIA and PHONOPHOBIA. (International Classification of Headache Disorders, 2nd ed. Cephalalgia 2004: suppl 1)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.Glaucoma: An ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. The consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (Dictionary of Visual Science, 4th ed)Glaucoma, Angle-Closure: A form of glaucoma in which the intraocular pressure increases because the angle of the anterior chamber is blocked and the aqueous humor cannot drain from the anterior chamber.Eye Diseases: Diseases affecting the eye.Vision Disorders: Visual impairments limiting one or more of the basic functions of the eye: visual acuity, dark adaptation, color vision, or peripheral vision. These may result from EYE DISEASES; OPTIC NERVE DISEASES; VISUAL PATHWAY diseases; OCCIPITAL LOBE diseases; OCULAR MOTILITY DISORDERS; and other conditions (From Newell, Ophthalmology: Principles and Concepts, 7th ed, p132).Optic Nerve: The 2nd cranial nerve which conveys visual information from the RETINA to the brain. The nerve carries the axons of the RETINAL GANGLION CELLS which sort at the OPTIC CHIASM and continue via the OPTIC TRACTS to the brain. The largest projection is to the lateral geniculate nuclei; other targets include the SUPERIOR COLLICULI and the SUPRACHIASMATIC NUCLEI. Though known as the second cranial nerve, it is considered part of the CENTRAL NERVOUS SYSTEM.Endothelium, Corneal: Single layer of large flattened cells covering the surface of the cornea.Lenses, Intraocular: Artificial implanted lenses.Optometry: The professional practice of primary eye and vision care that includes the measurement of visual refractive power and the correction of visual defects with lenses or glasses.Optic Nerve Diseases: Conditions which produce injury or dysfunction of the second cranial or optic nerve, which is generally considered a component of the central nervous system. Damage to optic nerve fibers may occur at or near their origin in the retina, at the optic disk, or in the nerve, optic chiasm, optic tract, or lateral geniculate nuclei. Clinical manifestations may include decreased visual acuity and contrast sensitivity, impaired color vision, and an afferent pupillary defect.Pressure: A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Laser Therapy: The use of photothermal effects of LASERS to coagulate, incise, vaporize, resect, dissect, or resurface tissue.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.Postoperative Period: The period following a surgical operation.Ultraviolet Rays: That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-UV or biotic or vital rays) are necessary for the endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter, ionizing wavelengths (far-UV or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants.

Central corneal thickness considered an index of corneal hydration of the UVB irradiated rabbit cornea as influenced by UVB absorber. (1/42)

UVB radiation from sunlight induces an acute corneal inflammation, photokeratitis, accompanied by changes in corneal hydration. We employed a method of ultrasonic pachymetry for daily examination of central corneal thickness as an index of corneal hydration of the rabbit cornea repeatedly irradiated by UVB radiation (312 nm, daily dose of 0.25 J/cm(2) during three or four days) as influenced by UVB absorber (actinoquinol combined with hyaluronic acid) dropped on the ocular surface during irradiation. One day after the third irradiation procedure the animals were sacrificed and corneas examined immuno-histochemically for peroxynitrite formation, a marker of oxidative damage, the antioxidant aldehyde dehydrogenase 3A1 and endothelial nitric oxide synthase, an enzyme generated nitric oxide. Results show that UV absorber combined with hyaluronic acid protected the cornea against UVB-induced changes in corneal thickness and microscopical disturbances to the cornea (both seen after buffered saline application) until the fourth experimental day. These UVB doses are equivalent to a daily exposure of 2.5 hrs of the human cornea to solar UVB radiation for three consecutive days. It is suggested that actinoquinol/ hyaluronic acid drops might be helpful for the human eye in the defence against photooxidative and other oxidative processes.  (+info)

Combining corneal hysteresis with central corneal thickness and intraocular pressure for glaucoma risk assessment. (2/42)

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Seven-year changes in corneal power and aberrations after PRK or LASIK. (3/42)

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Reproducibility and age-related changes of ocular parametric measurements in rabbits. (4/42)

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A short-term in vivo experimental model for Fuchs endothelial corneal dystrophy. (5/42)

PURPOSE: We evaluated the in vivo functionality of a corneal endothelium tissue-engineered using corneal endothelial cells from human patients with Fuchs endothelial corneal dystrophy (FECD). METHODS: A total of 15 healthy cats underwent full-thickness corneal transplantation. All transplants were of xenogeneic human origin and all grafts but two were tissue-engineered. In seven animals the graft corneal endothelium was tissue-engineered using cultured corneal endothelial cells from humans with FECD (TE-FECD). Two control animals were grafted with an endothelium engineered using cultured endothelial cells from normal eye bank corneas (TE-normal). Two controls received a native full-thickness corneal transplant, and four other controls were grafted with the stromal carrier only (without endothelial cells). Outcome parameters included graft transparency (0, opaque to 4, clear), pachymetry, optical coherence tomography, endothelial cell morphometry, transmission electron microscopy (TEM), and immunostaining of function-related proteins. RESULTS: Seven days after transplantation, 6 of 7 TE-FECD grafts, all TE-normal grafts, and all normal native grafts were clear (transparency score >3), while all carriers-only grafts were opaque (score <1). The mean pachymetry was 772 +/- 102 mum for TE-FECD, 524 +/- 11 mum for TE-normal, 555 +/- 48 for normal native, and 1188 +/- 223 mum for carriers only. TEM showed subendothelial loose fibrillar material deposition in all TE-FECD grafts. The TE endothelium expressed Na(+)-K(+)/ATPase and Na(+)/HCO3(-). CONCLUSIONS: Restoration of transparency and corneal thickness demonstrated that the TE-FECD grafts were functional in vivo. This novel FECD seven-day living model suggests a potential role for tissue engineering leading to FECD cell rehabilitation.  (+info)

Corneal epithelial thickness mapping by Fourier-domain optical coherence tomography in normal and keratoconic eyes. (6/42)

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Central corneal thickness in a Korean population: the Namil Study. (7/42)

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Beveled femtosecond laser astigmatic keratotomy for the treatment of high astigmatism post-penetrating keratoplasty. (8/42)

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*Intraocular pressure

Tanaka GH (April 1998). "Corneal pachymetry: a prerequisite for applanation tonometry?". Arch Ophthalmol. 116 (4): 544-5. PMID ... Grieshaber MC, Schoetzau A, Zawinka C, Flammer J, Orgul S (June 2007). "Effect of Central Corneal Thickness on Dynamic Contour ... A newer transpalpebral and transsleral tonometry method is not influenced by corneal biomechanics and does not need to be ... Measured values of intraocular pressure are influenced by corneal thickness and rigidity. As a result, some forms of refractive ...

*D. Jackson Coleman

"Central corneal thickness measured by the Orbscan II system, contact ultrasound pachymetry, and the Artemis 2 system". Journal ... "Repeatability of Layered Corneal Pachymetry with the Artemis Very High-Frequency Digital Ultrasound Arc-Scanner". Journal of ... "Repeatability of Layered Corneal Pachymetry with the Artemis Very High-Frequency Digital Ultrasound Arc-Scanner". Journal of ... Vanderbeek, Brian L; Silverman, Ronald H; Starr, Christopher E (2009). "Bilateral Salzmann-like nodular corneal degeneration ...

*കോർണിയ - വിക്കിപീഡിയ

Corneal pachymetry. *Corneal reflex. *Corneal tattooing. *Corneal topography. *Eye disease. *List of keratins expressed in the ...

*Dan Reinstein

High-frequency ultrasound corneal pachymetry in the assessment of corneal scars for therapeutic planning. Contact Lens ... Combined corneal topography and corneal wavefront data in the treatment of corneal irregularity and refractive error in LASIK ... Repeatability of layered corneal pachymetry with the artemis very high-frequency digital ultrasound arc-scanner. Journal of ... Epithelial, stromal and corneal pachymetry changes during orthokeratology. Optometry and Vision Science. 2009 Aug;86(8):E1006- ...

*Refractive surgery

Corneal topography and pachymetry are used to screen for abnormal corneas. Furthermore, some people's eye shape may not permit ... Customized Transepithelial No-touch (C-TEN) is an innovative strategy for corneal surgery that avoids any corneal manipulation ... It involves cutting a flap in the cornea and pulling it back to expose the corneal bed, then using an excimer laser to ablate ... Intrastromal corneal ring segments (Intacs) are approved by FDA for treatment of low degrees of myopia. Phakic intraocular lens ...

*Glaucoma

... methods such as Goldmann tonometry should be augmented with pachymetry to measure the central corneal thickness (CCT). A ... Also, the corneal appearance is not as hazy. A reduction in visual acuity can occur followed neuroretinal breakdown. Associated ... Because pressure measurement error can be caused by more than just CCT (i.e., corneal hydration, elastic properties, etc.), it ... with temporal clear corneal phacoemulsification cataract surgery for open-angle glaucoma and visually significant cataract: one ...

*Eye examination

Positive relative accommodation Vergence system Optokinetic system Amsler grid Gonioscopy Corneal topography Corneal pachymetry ... Fluorescein staining before slit lamp examination may reveal corneal abrasions or herpes simplex infection. The binocular slit- ...

*Corneal pachymetry

... is essential for other corneal surgeries such as Limbal Relaxing Incisions. LRI is used to reduce corneal ... think of it as a corneal A-scan. Pachymetry using the corneal waveform allows the user to more accurately measure the corneal ... Pachymetry using the corneal waveform process allows the user to more accurately measure the corneal thickness, verify the ... The study reported that corneal thickness as measured by corneal pachymetry was an accurate predictor of glaucoma development ...

*Pellucid marginal degeneration

The gold standard diagnostic test for PMD is corneal topography. However, it may not as specific as corneal pachymetry, because ... PMD lacks apical corneal scarring, Rizutti's phenomenon, Munson's sign, and the central corneal thickness is usually normal. ... Corneal topography may show a "crab claw-like" appearance, a finding that is seen in both keratoconus and in pellucid marginal ... Corneal transplant surgery may be difficult due to the peripheral thinning of the cornea, even with large and off-center grafts ...

*OCT Biomicroscopy

Direct corneal elevation measurements using multiple delay en face optical coherence tomography. J Biomed Opt. 2008 Sep-Oct;13( ... Keratoconus diagnosis with optical coherence tomography pachymetry mapping. Ophthalmology 2008 Dec;115(12):2159-66. Eye ... High-speed optical coherence tomography of corneal opacities. Ophthalmology. 2007 Jul;114(7):1278-85. Plesea et al. ... have demonstrated the ability of OCT systems to depict pathology within the cornea as well as disorders of corneal topography. ...
Corneal pachymetry is the process of measuring the thickness of the cornea. A pachymeter is a medical device used to measure the thickness of the eyes cornea. It is used to perform corneal pachymetry prior to refractive surgery, for Keratoconus screening, LRI surgery and is useful in screening for patients suspected of developing glaucoma among other uses. It can be done using either ultrasonic or optical methods . The contact methods, such as ultrasound and optical such as confocal microscopy (CONFOSCAN), or noncontact methods such as optical biometry with a single Scheimpflug camera (such as SIRIUS or PENTACAM), or a Dual Scheimpflug camera (such as GALILEI), or Optical Coherence Tomography (OCT, such as Visante) and online Optical Coherence Pachymetry (OCP, such as ORBSCAN). Corneal Pachymetry is essential prior to a refractive surgery procedure for ensuring sufficient corneal thickness to prevent abnormal bulging of the cornea, a side effect known as ectasia. The instrument used for this ...
Corneal pachymetry is a non-invasive ultrasonic technique for measuring corneal thickness, and has been used primarily in the evaluation of persons with corneal diseases and in the assessment of persons at risk for glaucoma. Ultrasonic corneal pachymetry is performed by placing an ultrasonic probe on the central cornea, after the cornea has been anesthetized with a topical anesthetic. A technician can operate the pachymeter and it normally takes less than 30 seconds per eye to complete measurements.. The Ocular Hypertension Treatment Study (Kass et al, 2002; Gordon et al, 2002), a prospective randomized controlled clinical trial of glaucoma treatment in persons with elevated intra-ocular pressure (IOP) greater than or equal to 24 mm Hg, found central corneal thickness a statistically significant predictor of development of glaucoma. Corneal thickness was measured only after the study was initiated, and was not used to guide therapy. For the enrolled patients, the Ocular Hypertension Treatment ...
Latest Report Available at Orbis research Corneal Pachymetry Market provides pin-point analysis for changing competitive dynamics and a forward looking per
Corneal epithelial thickness has been found to remodel and change significantly after femto-LASIK, according to the findings of a prospective study conducted under the direction of A. John Kanellopoulos, MD, and colleagues. ...
Purpose: To assess reproducibility of central corneal thickness (CCT) measurement by means of ultrasonic pachymetry.. Methods: Fifty one volunteers underwent three sessions of CCT measurements, each consisting of three CCT measurements, performed by each of three different observers. Intra- and interobserver reproducibility was calculated by means of intraclass correlation coefficient (ICC). The expected range of variability between two independent evaluations was calculated using scatter plots of each test-retest difference against their mean. The standard deviation of the mean differences in the test-retest scores was used to describe the differences in the score spread.. Results: The ICC ranges of the intra- and interobserver evaluations were 0.95-0.97 and 0.89-0.95 respectively; the expected variability was ⩽±1% and ⩽± 2% respectively (95% confidence interval).. Conclusions: The measurement of CCT by means of ultrasonic pachymetry is highly reproducible.. ...
Following the surgery BCVA was 0,09�Â�±0,05 on the 1st day; 0,47�Â�±0,25 in 1; 0,59�Â�±0,31 in 3 ;0,65�Â�±0,31 in 6; 0,66�Â�±0,25 in 9 months. Corneal pachymetry were 585,17�Â�±51,57; 854,50�Â�±45,37; 656,67�Â�±106,54; 587,00�Â�±54,52; 614,63�Â�±90,91; 585,92�Â�±71,18; ECD in 9 months: 677,56�Â�±146,57 cells/mm2. DMEK group: BCVA was 0,1�Â�±0,05 and 0,5�Â�±0,12 in 7 days; 0,5�Â�±0,11 in 1;0,7�Â�±0,11 in 3; 0,7�Â�±0,19 in 9; 0,8�Â�±0,13 in 12; 0,8�Â�±0,11 in 24 months.Central corneal pachymetry were 588�Â�±12;552 �Â�± 49;564�Â�±22;541�Â�±18;551�Â�±38;573�Â�±41;The ECD was 1640�Â�±87 in 12 months ...
Journal of Refractive Surgery | PURPOSE:To evaluate and compare epithelial remodeling after standard corneal cross-linking (S-CXL) and iontophoresis-assisted CXL (I-CXL) in eyes with keratoconus by anterior segment optical coherence tomography (AS-OCT).METHODS:In this prospective, observational study, AS-OCT and corneal topography were performed before and 1, 3, and 6 months after surgery. Corneal pachymetry was performed and
Professor Taylor is registered with all major insurance companies (a list of provider registration numbers is available here.) and insurance companies are generally billed directly by Professor Taylors secretary. Professor Taylor is fee-assured for BUPA and AXA PPP and charges within all insurance fee schedules.. Self-pay treatment. Self-pay treatment is also available, and is often available on a fixed-price package basis, e.g. for cataract surgery or intravitreal injections. Further information is available from Professor Taylors secretary or from the Guildford Nuffield Hospital directly.. Self-pay appointments are charged at £225 for a new appointment and £100 for a follow-up appointment. This includes the cost of the consultation and associated diagnostic tests including visual field testing, corneal pachymetry, biometry, ultrasound scanning or optical coherence tomography (OCT) scanning. This is in contrast to many private practice settings in which these tests incur an extra charge, ...
Journal of Ophthalmology is a peer-reviewed, Open Access journal that publishes original research articles, review articles, and clinical studies related to the anatomy, physiology and diseases of the eye. Submissions should focus on focusing on new diagnostic and surgical techniques, instrument and therapy updates, as well as clinical trials and research findings.
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Eyes Instrument Biometer & Pachymeter (OD1-AP) picture from Xuzhou Kaixin Electronic Instrument Co., Ltd. view photo of Ophthalmology Equipment, P Scan, Ophthalmic Ultrasound.Contact China Suppliers for More Products and Price.
Corneal images taken with the Phoenix Micron IV OCT used for thickness analysis King et al, a consortium of researchers at a range of institutions, recently used the Phoenix Micron IV OCT to examine corneal thickness in their article, "Genomic locus modulating corneal thickness in the mouse identifies POU6F2 as a potential risk of developing. ...
The distribution of the CCT values is shown in Figure 1. The mean (SD), median, skewness, and kurtosis of CCT distribution was 530.9 (31.5) μm (range 380-627), 529.0 μm, 0.08, and 0.32, respectively, which suggest a normal distribution. The distributions of CCT for age categories are presented in Table 1. In univariate analysis, a thicker CCT was correlated significantly with a younger age (P , 0.001), higher IOP (P , 0.001), and longer AL (P = 0.003); however, CCT was not associated significantly with ACD (P = 0.087, Table 2). According to the regression line, CCT decreased by 4.0 μm for every decade of life (95% confidence intervals [CI] 2.4-5.5 μm), increased by 2.73 μm for every 1 mm Hg increase in the IOP (95% CI 2.10-3.36 mm Hg), and increased by 2.84 μm for every mm increase in the AL (95% CI 0.98-4.71 μm). When CCTs of male and female subjects were compared, the average CCT in men was 5.8 μm more than that in women (P = 0.001, Table 3). The average CCT in subjects with ...
Results: The mean central corneal thickness was 537±42 µm (OCT), 535±43 µm (OCP), 552±40 µm (US 20) and 551±34 µm (US 50). The reproducibility was 3.3 µm (OCT), 3.1 µm (OCP), 2.6 µm (US 20) and 1.8 µm (US 50). The mean epithelial thickness was 68±9 µm (OCT) and 54±3 µm (US 50) with a reproducibility of 5.9 µm (OCT) and 1.9 µm (US 50). Although the correlations coefficients for the measurements of the corneal thickness were between 0.97 and 0,99 (P,0,001), the mean difference between optical and acoustic methods was 20 µm (P,0,001). The limits of agreement (±2SD) revealed maximum values of ±41 µm (7.6 ...
Glaucoma is a common cause of blindness and visual diability in Australia. It is caused by a combination of environmental and genetic factors. People
El grosor corneal se cuantifica con la paquimetría. La medida de la presión intraocular depende del grosor corneal. Los pacientes con córneas más gruesas...
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The integrated contact-free optical pachymetry provides precise information about the thickness of the cornea throughout the entire duration of the treatment. The changes are measured and displayed on the treatment screen online. The measurements are taken before the preparation and after lifting of the flap, as well as during and after the laser treatment. This increases the intraoperative safety in refractive treatments. All data are documented in the treatment log.. ...
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Sentence reads. IMA was measured and beveled....A soft dog was placed proximally. Soft dog? This is an ASR report and thats what the software had put in and that is exactly what I am hearing too. I am way too tired to be doing this. Anybody?. ...
Researchers at Mayo Clinic have identified the specific genetic defect in the TCF4 gene - the expansion of the TGC repeat - that appears to be responsible for Fuchs endothelial corneal dystrophy (FECD).
Reproducible and repeatable objective means to evaluate corneal endothelial morphology and CCT are vital, in both clinical and research settings. Assessment of the endothelium is crucial to determine the suitability of donor corneas, to monitor the outcome of anterior segment procedures, such as cataract surgery, and when evaluating the safety of new intraocular or corneal surgical procedures and intraocular lenses [32, 33]. Thus, assessment and validation of newly developed measurement techniques is essential to determine which techniques can be used interchangeably.. The results of this study indicate that the intra-observer repeatability of ECD, CV, and CCT measurements using z-ring CS4 were not significantly different (p ≥ 0.05). Also, there were no statistically significant differences in intra-observer repeatability for observer 1 of ECD, CV, and CCT measurements with SP-2000P and USP (CCT only). These results indicate a high reliability of repeat testing for ECD, CV, and CCT ...
In their letter to the editor, De Roo and colleagues1 present results from complementary experiments. Inclusion of an extended range of analytes and an additional cohort of pseudophakic controls (Edemapsph), composed of eyes diagnosed with graft failure or pseudophakic bullous keratopathy, allow for a more detailed analysis. The authors confirm the results from our study with respect to elevated aqueous MCP-1 expression in pseudophakic FECD eyes and demonstrate increased expression of aqueous IL-8 after cataract surgery.1 Their results describe increased TGF-β2 levels in phakic FECD patients compared with phakic (cataract) controls and increased TGF-β2 levels in pseudophakic FECD patients compared with pseudophakic controls (Edemapsph).1 Moreover, they find increased TGF-β3 expression in the aqueous humor of phakic FECD eyes compared with all three other groups.1 ...
A 53-year-old man presented for an ocular health evaluation. Early in his childhood, the patient received a diagnosis of osteogenesis imperfecta (OI) type I. His medical history included 27 bone fractures before age 12 years, multiple tendon ruptures, osteoporosis, a mechanical aortic valve replacement, and recurrent corneal erosions. The examination revealed a blue-gray appearance of the sclera in both eyes (image A). Results of a corneal pachymetry measurement revealed decreased corneal thickness. A recent magnetic resonance image revealed a complete rupture of his quadriceps tendon distally (image B, arrow). The diagnosis was corneal thinning secondary to OI type I. ...
Corneal pachymetry is a useful practice: it consists in measuring the corneal depth in order to monitor the cornea guttata and corneal edema status.. In the initial phase it can be treated with a therapy consisting in hyperosmotic agents that draw excess water out of the cornea, making it possible to improve vision, most likely only for a period of time.Later on, it is best to substitute the damages endothelium via an endothelium corneal transplant with the DMEK or DSAEK technique.. ...
Journal of Refractive Surgery | PURPOSE:To report the long-term clinical outcomes of a patient with Terriens marginal degeneration who underwent successful peripheral corneal cross-linking (CXL) to arrest progression.METHODS:Clinical assessment included uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), corneal topography, anterior segment optical coherence tomography, ultrasonic pachymetry,
Definition of Terrien marginal degeneration. Provided by Stedmans medical dictionary and Drugs.com. Includes medical terms and definitions.
The present invention provides method of adjusting a thickness profile of a top metal layer of a workpiece using a processing solution. A thickness profile control member is included that has at least first and second regions that will allow for processing at respective first and second rates that are different from each other. When processing the workpiece, the processing system establishes relative lateral movement between the workpiece and the thickness profile control member so that a certain portion of the workpiece is disposed in locations that correspond to the first and second regions at different points in time during the processing. In a preferred aspect, the lateral movement is controlled as a result of data obtained from sensors relating to the thickness of a removed or deposited layer.
The present invention provides method of adjusting a thickness profile of a top metal layer of a workpiece using a processing solution. A thickness profile control member is included that has at least first and second regions that will allow for processing at respective first and second rates that are different from each other. When processing the workpiece, the processing system establishes relative lateral movement between the workpiece and the thickness profile control member so that a certain portion of the workpiece is disposed in locations that correspond to the first and second regions at different points in time during the processing. In a preferred aspect, the lateral movement is controlled as a result of data obtained from sensors relating to the thickness of a removed or deposited layer.
Findings published in the American Journal of Pathology offer new directions for treatment of patients with Fuchs Endothelial Corneal Dystrophy (FECD)
If you or someone close to you has been diagnosed with Keratoconus, you have probably done what most patients have done in the last 10 years. Googled it! When most patients look up their options online, they stumble across a million articles about corneal collagen crosslinking otherwise known as CXL. Now, luckily, the FDA has… Read More » ...
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This work shows that three-dimensional images from MPLSM of endogenous tissue fluorescence can effectively distinguish between normal, precancerous, and cancerous epithelial tissues. The high-resolution capability of MPLSM enabled the identification of three morphologic features (nuclear density ratio, keratin, and epithelial thickness), which showed statistically significant differences between normal and both precancerous and cancerous tissues. Moreover, statistically significant differences were observed in the keratin thickness of dysplasia and both types of SCCs and in the epithelial thickness of dysplasia and CIS. The lack of statistically significant differences in the epithelial thickness of dysplasia and SCCs may be because the imaging depth was limited by signal attenuation in the SCCs, thus underestimating the epithelial thickness in these samples. The statistically significant morphologic changes that accompany precancer and cancer development in the MPSLM images ( Table 1) are ...
During the surgery following complications were observed: 5cases of donor cornea perforation in Group1, 7cases in Group2. In the early postop period 4pupillary blocks were observed at Group1, 2cases of graft dislocation were observed (1at each Group). Preop BCVA in Group1 was 0,025±0,07, in Group2 - 0,15±0,13. 1 month postop BCVA was 0,45±0,16 and 0,67±0,17 in Groups 1 and 2 respectively. Postop mean ECD was 2245±194 cells/sq.mm in Group1, 1980±181 cells/sq.mm in Group2, pachymetry was 645±46μm in Group1 compared to 548±12μm in Group2. 12 month postop BCVA in Group1 was 0,63±0,23, in Group2 - 0,81±0,20; ECD 2070±154 cells/sq.mm and 1900±221 cells/sq.mm, pachymetry - 620±33μm, and 538±28μm respectively. Late complications: 1case of transplant rejection in Group1, 4cases of corneal decompensation in Group2 ...
PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
The Scheimpflug is a rotating camera which captures images of the anterior eye segment. A Scheimpflug measurement process takes less than two seconds to measure each eye, and then generates images and corneal maps used for diagnosis and treatment of cataracts, glaucoma and corneal problems. Currently Medicare do not offer any refund for this test.. ...
Refractometer, Keratometer, Tonometer, Pachymeter, Glaucoma, Cornea, Topcon TRK-2P,keratometry, pachymetry, adjusted tonometer, touchscreen, control panel, rotary prism
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The plates were beveled, backed, and in an attempt to capture the whitest whites we mirror finished the plates before degreasing with putz pomade and felt. We hope to see a lightening the plate tone that appears. Soy sauce used to degrease.. Plate A: Using the Aquatint Screen filter we scanned over it, we printed the image on a white sheet of paper and viewed the image with a loop without any changes made by us. We decided to try one at "factory settings" because of the promising image magnified. In Photoshop: Image resized to 300 dpi.. Inserted aquatint screen filter in a new adjustment layer. Kept the scaling at 104 and relief at 23 with no alteration. In channel mixer checked monochrome. left all setting at 100%, then inverted the image. The curves were kept at White: 255 and Black: 0 (unchanged) the color balance was kept at 0 for all.. Plate B: Resized the image to 300 dpi.. Inserted aquatint screen filter in a new adjustment layer. Kept the scaling=104 relief= 23.. In Channel Mixer: ...
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A surgical cassette unloading and unloading system having a peristaltic pump roller head with a flared and beveled notch and a plunger or probe that engages the cassette peristaltic pump tube.
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The early stages of pellucid marginal degeneration may also be managed with soft contact lenses.[2] Success has been shown with the use of rigid gas permeable contact lenses combined with over-refraction. People wearing contacts dont report increased problems with glare and contrast sensitivity, but it is not clear if this is due to the corneal disease, or the contact lenses themselves. New studies found that the use of Scleral contact lens, a type of rigid gas permeable (RGP) lens, may be a good option for most people with PMD. Most of these lenses are in the range of 15.5mm to 18.0mm in diameter. Regardless of the lens size, it is thought that the larger the RGP lens will in most cases be more comfortable then standard rigid corneal lenses, and at times more comfortable than soft lenses, regardless of the fact that it is a rigid lens. The highlight to the scleral design and the correction of eye disorders such as pellucid marginal degeneration is that vision with these types of lenses is ...
We describe a bidirectional color Doppler Fourier-domain optical coherence tomography system capable of measuring absolute velocities of moving scatterers by illuminating the sample with two linearly and orthogonally polarized beams, incident at a known angle on the sample. The velocity calculation is independent of the exact orientation of the velocity vector in the detection plane. First measurements were performed on a rotating disk driven at well-defined velocities and tilted by various small angles. Our results indicate a high correlation between preset and calculated velocities (correlation coefficient 0.999) and the independency of these velocities from the tilting angle of the disk. We demonstrate that bidirectional color Doppler optical coherence tomography allows for the measurement of absolute blood flow values in vivo in human retinal vessels.. © 2008 Optical Society of America. Full Article , PDF Article ...
This is a non-randomized study. All eyes that qualify for the study will receive the cross-linking (CXL) procedure. Corneal collagen cross-linking is performed as a single treatment. Depending on the patients condition, the CXL procedure may be performed under sedation or anesthesia. Subjects are followed for 12 months after the procedure to evaluate the long term effects of corneal collagen cross-linking ...
Fuchs Dystrophy is a type of corneal disease that affects the inner most layer of the cornea-the endothelium. Fuchs Dystrophy is slowly progressive, is found in both eyes and is slightly more common in women than men. While we can see Fuchs Dystrophy in people in their 30s and 40s, it usually does not compromise vision until people are in their 50s or 60s.. About Fuchs Dystrophy. The endothelial cells are responsible for pumping water out of the cornea and helping to maintain the corneal transparency. While the reason is poorly understood, in Fuchs Dystrophy, the endothelial cells die, which make the endothelium less efficient in its pumping activity. This results in the cornea swelling and distorting vision. Fuchs Dystrophy Risks & Severity. Researchers reporting in the journal Investigative Ophthalmology and Visual Science studied the effects of smoking, and other risk factors, on the development of advanced Fuchs endothelial corneal dystrophy (FECD) and on central corneal thickness ...
Central corneal thickness of Iraqi population in relation to age, gender, refractive errors, and corneal curvature: a hospital-based cross-sectional study Yasir Jawad Kadhim,1 Qasim K Farhood2 1Ibn Al Haitham Teaching Eye Hospital, Baghdad, 2Department of Ophthalmology, College of Medicine, University of Babylon, Babylon, Iraq Background: Central corneal thickness (CCT) is an important indicator of corneal status. Its measurement provides valid information about corneal physiological condition and possible changes associated with diseases, traumas, and hypoxia. It is an integral part for interpretation of intraocular pressure and glaucoma patient management and in prerefractive procedure assessment. Objective: The aim of this study is to determine the mean CCT among a normal Iraqi population and to correlate between CCT and age, gender, refraction, and corneal curvature. Patients and methods: This cross-sectional study was carried out at Ibn Al-Haitham Teaching Eye Hospital. A total of 418 eyes from
William Trattler, MD, gives an overview of recently FDA-approved corneal collagen cross-linking. Dr. Trattler gives advice on how to implement this procedure into your practice and how to identify and monitor patients.
0026] The clamping block 40 may include a beveled collar 46 radiating from its outer wall. The beveled collar 46 includes a beveled surface 48 and a flat surface 50. The flat surface 50 is configured to be acted upon by a spacer ring 52, which is, in turn, acted upon by the nut 80 when tightened. The spacer ring 52 is constructed of a rigid material such that it provides a surface against which the nut 80 may slide when rotated thereagainst. The spacer ring 52 thus reduces the degree to which rotational motion of the nut 80 is transmitted to the elastomeric material of the clamping block 40. The beveled surface 48 acts against a corresponding surface the housing 22 to prevent axial movement of the clamping block 40 when the nut 80 is tightened. The beveled surface 48 also transmits axial compression to an inward deformation of the central lumen 42 such that any tool disposed within the central lumen 42 is squeezed by the clamping block 40. Additionally, the central lumen 42 of the clamping block ...
PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
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The FDA has cleared Optovue to market its epithelial thickness mapping software in the U.S. Eye doctors can use the updated software and accompanying optical coherence tomography device to automatically assess the thickness of the epithelial and stromal layers.
Corneal collagen crosslinking (CXL) was effective at improving the maximum K value, corrected distance visual acuity, and uncorrected distance visual acuity in eyes with cornea ectasia at 1 year post-treatment, according to researchers in a prospective, randomized, multicenter controlled clinical trial. Led by Peter Hersh, MD, the researchers focused on the safety and efficacy of corneal collagen crosslinking to treat corneal ectasia after refractive surgery in 179 subjects. The treatment group had standard CXL compared with riboflavin alone without removal of the epithelium in sham control group patients. The primary efficacy criterion was a change over 1 year of topography-derived maximum keratometry when comparing the two study groups. The maximum K value declined by 0.7 D from baseline to 1 year, compared with a continued progression in the control group (1.3 D difference between treatment and control). The maximum K value decreased by 2.0 D or more in 14 eyes (18%) and by 2.0 D or more in ...
This work shows that three-dimensional images from MPLSM of endogenous tissue fluorescence can effectively distinguish between normal, precancerous, and cancerous epithelial tissues. The high-resolution capability of MPLSM enabled the identification of three morphologic features (nuclear density ratio, keratin, and epithelial thickness), which showed statistically significant differences between normal and both precancerous and cancerous tissues. Moreover, statistically significant differences were observed in the keratin thickness of dysplasia and both types of SCCs and in the epithelial thickness of dysplasia and CIS. The lack of statistically significant differences in the epithelial thickness of dysplasia and SCCs may be because the imaging depth was limited by signal attenuation in the SCCs, thus underestimating the epithelial thickness in these samples. The statistically significant morphologic changes that accompany precancer and cancer development in the MPSLM images ( Table 1) are ...
Comparative map before and after CXL-plus (trans-PTK-PRK + accelerated CXL). SCVA improved from 20/50 to 20/25. Epi-off corneal crosslinking (CXL) is a proven treatment for corneal ectatic disease. It halts the ectatic process by strengthening the cornea by means of creating covalent bonds between collagen fibrils. In the last three years many efforts have been made by researchers and ophthalmic companies to improve the quality and the time of treatment through development of new riboflavin solutions and new irradiance protocols.. However, even though the main target of halting corneal ectasia is reached in most cases, few patients affected by moderate to severe keratoconus have a consistent visual acuity (VA) improvement. When performed on its own, the CXL procedure is not intended to improve vision, but rather to stabilise disease, and therefore the patient still remains to be rehabilitated visually, thereby affecting their quality of life. Many face the need to wear customised contact lenses ...
Results. The first study on crosslinking treatment of keratoconus was performed in 2003 by Wollensak [1]. In this 3-year study, 22 patients with progressive keratoconus were treated with riboflavin and UVA. In all treated eyes, the progression of keratoconus was at least stopped («freezing»). In 16 there also was a slight reversal and flattening of the keratoconus by 2 diopters. Best corrected visual acuity improved slightly in 15 eyes. The 6-year-long term follow-up data of this study including 241 treated eyes again demonstrated a decrease of keratectasia by up to 4.34 dpt after 3 years, a slight increase in visual acuity and improved contact lens tolerance [5]. Two eyes had to be crosslinked twice due to continued progression. These patients had steroid treatment for neurodermitis, however. Other treatment failures were reported in pregnant patients. Apart from that, neither progression of keratectasia nor serious complications have been observed in the Dresden study so far. In CXL, the ...
Materials and methods: Retrospective case series study of 101 keratoconic eyes of 58 patients was undertaken. They all had complete eye examination including corneal topography (Oculus Pentacam). Kmean, Kmax, higher order aberrations (HOAs) root mean square (HOARMS) value, pachymetry at thinnest point and steepest corneal meridian were obtained from Pentacam. Apex to thinnest pachymetry distance (D) was calculated using trigonometry. Pearson correlation coefficients between Kmax and HOARMS, between D on the one hand and the adjusted angle of steepest meridian, Kmean and Kmax respectively on the other, were calculated ...
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Nationally recognized experts in managing keratoconus and pellucid marginal degeneration. We have extensive keratoconus contact lens experience.
Author:Dipak B Patel, J N Brahmbhatt, R N Kothari, Pooja Kumar, Deependar Solanki, Diwakar Sharma. Keywords:Glaucoma, Central corneal thickness, Open angle glaucoma, Applanation tonometry, Pachymetry.. Type:Original Article. Full PDF Abstract ...
Author:Dipak B Patel, J N Brahmbhatt, R N Kothari, Pooja Kumar, Deependar Solanki, Diwakar Sharma. Keywords:Glaucoma, Central corneal thickness, Open angle glaucoma, Applanation tonometry, Pachymetry.. Type:Original Article. Full PDF Abstract ...
Keratoconus is a non-infectious eye condition in which the normally round and regular shape of the cornea progressively thins and bulges until it is a cone-like, irregular shape. This cone shape transformation deflects light as it enters the eye, causing substantial vision impairment.. Corneal Collagen Crosslinking* is a relatively pain-free parasurgical treatment for keratoconus that involves the application of riboflavin eye drops to the eye. Crosslinking is performed to slow or stop the progression of Keratoconus and/or ectasia and to postpone or eliminate the need for corneal transplant.. More info at: www.njoyvision.com/keratoconus/corneal-collagen-crosslinking-cxl. ...
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The beam of laser gentle is focused to your precise position within the stroma (central layer in the cornea), where by a string of small bubbles is fashioned. A huge number of these microscopic bubbles are specifically positioned to define the flaps Proportions and distinct beveled edge, and also site in the hinge. Bubbles are then stacked along the sting with the flap up for the corneal surface to finish the flap. The process from get started to finish can take roughly 45 seconds ...
The Royal 10 has to be my favorite typewriter of all time. Why? Its a standard with a small side to it, and not gigantic. Its never failed me, and never let me down. Plus, it just looks so damned nice! I mean, not only that, but the beveled glass panels on each side are the icing on the cake for me. I was one of the lucky few to find my Royal 10 on Craigslist. I was looking for one for a long time, and I happened to see an ad on there, reading 1930s BUSINESS MACHINES". I was immediately intrigued, so I clicked on it. I saw an old Burroughs Adding Machine, with all glass sides, complete with gold-leafed decals. (I really dont know how to work it, so Ive got it laying around somewhere.), an old check machine, still working, and the Royal. They were all quite dusty, and the guy wanted $40.00 for the whole lot. When I got there, he opened the garage, and I saw the Royal. i knew it was love at first sight. I asked if I could take just the typewriter, and he said hed really like to get rid of ...
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Samsungs groundbreaking X820 expresses Samsungs devotion to creating the slimmest product for the market today. Weighing only 66 grams with slender 6.9mm thinness, the lightweight X820 is todays modern method to stay connected. The X820 balances slim elegance with a functional keypad and finishes with a beautifully beveled cut for a natural grip. The fiberglass-infused plastic is used to increase extraordinary durability while keeping it lightweight. The X820 is the true complement to todays active consumers as it becomes one with the users in their wallets, shirt pockets, or a pair of jeans for mobility in style ...
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Despite a number of weak points in these studies, Teil en Proscar richtig teilen, Badr IA Corneal ectasia in vernal maltumorsonp. With this in mind, we decided to bring the text up to date and to bring in expertise to co-author many of the chapters, especially those in which we teiilen no longer experts. b.
To obtain a database, containing at least two valid corneal Scheimpflug measurements recorded at least 5 months apart, of 1500 keratoconus patients ...
A total of 15 eyes were scanned with the Visante Omni. A lid speculum was used to keep the rabbits eye open during the measurements to ensure that the eyelids did not block the 10-mm diameter mapping area. The cornea was kept wet regularly with balanced salt solution to prevent the ocular surface from drying. First, the cornea was scanned with ATLAS corneal topographer, incorporated with the Visante Omni, where 8000 data points of the anterior corneal surface were recorded. The anterior corneal topography data were then transferred to the Visante OCT station via a network link. The rabbit was then moved to the Visante OCT station to scan for global pachymetry. Pachymetry alignment with anterior corneal surface data, obtained from the ATLAS corneal topographer, required the observer to locate the center of the pupil, which was achieved when the vertex produced a vertical white line behind the center of the cornea. Thereafter, the Visante OCT system would lock onto the vertex and track it so that ...
Objective: To document the clinical and morphologic corneal findings in the early stages of congenital aniridic keratopathy in Swedish families. less thanbrgreater than less thanbrgreater thanDesign: Prospective, observational, comparative case series. less thanbrgreater than less thanbrgreater thanParticipants: A total of 16 eyes of 16 subjects with congenital aniridic keratopathy and a clear central cornea, and 6 eyes from 6 healthy controls (unaffected relatives). Nine of the 16 eyes with aniridia came from 5 families with a documented familial history of aniridia. less thanbrgreater than less thanbrgreater thanMethods: Detailed ophthalmic examinations included best spectacle-corrected visual acuity (BSCVA), tear film production, tear break-up time (BUT), corneal touch sensitivity, intraocular pressure measurement, ultrasound pachymetry, slit-lamp biomicroscopy, and laser scanning in vivo confocal microscopy (IVCM). less thanbrgreater than less thanbrgreater thanMain Outcome Measures: ...
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can also suggest that cataract surgery performed without problems does not change the corneal thickness.. There was a statiscally significative difference in CCT between OCULUS-Pentacam® and NIDEK CEM-530 in eyes before cataract surgery, but is not clinically relevant.. The OCULUS-Pentacam® Rotating Scheimpflug camera topographer and NIDEK CEM-530 specular microscope seems to be 2 interchangeable non-contact devices to measure CCT.. Autor: Barbara Blanco ...
Experiencing distorted vision after LASIK and not sure what the problem is? Perhaps you suffer from corneal ectasia, an uncommon LASIK risk.
All the news in contactology: soft and RGP contact lenses for keratoconus, Pellucid marginal degeneration, post surgery eyes and irregular corneas
An intravenous needle assembly includes a hollow needle having a beveled point, the needle being positioned transversely of a central section of an elongated, flexible, foldable body having oppositely disposed wing sections. The needle is provided with a flexible connecting tube and a connector for attachment to a desired device, such as a syringe, bottle, etc. The central section mounting the needle and the oppositely disposed wing sections carry a tapered foam pad with a pressure sensitive adhesive on the lower surface thereof when applied to the skin of a patients body. After the insertion of the needle in a vein, the needle is angled downwardly into the vein to position the beveled pointed end away from the walls of the vein.
We stand behind our products. All Kensight Sights are covered by a limited lifetime warranty. We guarantee our products against defects in material and construction. This limited lifetime warranty does not extend to normal signs of wear. It does not cover breakage, damage or rust due to misuse, improper maintenance, accidents, loss or theft. The warranty does not extend to damages cause by unauthorized repairs.. Any product we determine to be defective will be repaired or replaced solely at our discretion. To receive warranty repair or replacement, the owner must send the product to be evaluated by KFS Industries Warranty Services located at our Atlanta, Georgia headquarters. In addition to the provisions of this warranty, the owner may also have other rights that can vary by state. No other warranties are implied or expressed other than what is specifically stated here.. ...
Short collagen-like peptides (CLPs) are being proposed as alternatives to full-length collagen for use in tissue engineering, on their own as soft hydrogels, or conjugated to synthetic polymer for mechanical strength. However, despite intended clinical use, little is known about their safety and efficacy, mechanism of action or degree of similarity to the full-length counterparts they mimic. Here, we show the functional equivalence of a CLP conjugated to polyethylene glycol (CLP-PEG) to full-length recombinant human collagen in vitro and in promoting stable regeneration of corneal tissue and nerves in a pre-clinical mini-pig model ...
QUALITATIVE ANALYSIS. Table 3 describes all qualitative analysis results. There was a statistically significant tendency to make correct matches as evaluator age increased. The percent correct matches were significantly lower in the CH evaluator group compared with each of the other groups. The comparison between AD and RS was also significantly different. The percent correct matches of AD vs. OP and OP vs. RS were both not significantly different. The percent correct matches for only aspheric and established keratoconus topographies or KS topographies alone was also analyzed. When only aspheric and keratoconus topographies were evaluated, the comparisons did not change their pattern, except for OP vs. RS, which was statistically significant. When the analysis included only KS topographies, the percent correct matches decreased in every evaluator group and the CH group was no longer statistically different from AD group, but the difference remained when comparing CH with OP and RS groups. ...
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TY - JOUR. T1 - The frequency of non-pathologically thin corneas in young healthy adults. AU - Rashdan, Hannah. AU - Shah, Manali. AU - Robertson, Danielle M. PY - 2019/1/1. Y1 - 2019/1/1. N2 - Purpose: Measurement of normal corneal thickness and corneal epithelial thickness is important in keratorefractive surgery, glaucoma, following extended contact lens wear, and in patients with corneal disease. Clinically, a central corneal thickness less than 500 µm is considered to be moderately-to-extremely thin. The purpose of this study was to compare biological differences in patients with clinically thin compared to normal corneal thickness values in healthy young adults using Fourier domain optical coherence tomography. Patients and methods: In total, 168 eyes from 84 patients aged 19-38 years were scanned using an Avanti optical coherence tomographer. To eliminate circadian effects on corneal thickness, all patients were scanned within a 4-hour window. Corneal thickness was measured across the ...
Keltner JL, Thirkill C, Merrill K, Hanna E, Burt RK, Oyama Y. A Case of autoimmune-related retinopathy and optic neuropathy syndrome treated by autologous non-myeloablative hematopoietic stem cell transportation. Journal of Neuro-Ophthalmology, 29(1):43-49, 2009 Mar.. Choi SS, Zawadzki RJ, Greiner MA, Keltner JL, Werner JS. Fourier-domain optical coherence tomography and adaptive optics reveal nerve fiber layer loss and photoreceptor changes in a patient with optic nerve drusen. Journal of Neuro-Ophthalmology, 28(2):120-125.2008.. Choi SS, Zawadzki RJ, Keltner JL, Werner JS. Changes in cellular structures revealed by ultra-high resolution retinal imaging in optic neuropathies. Investigative Ophthalmology & Visual Science, 49(5):2103-2119. 2008.. Gerth C, Zawadzki RJ, Choi SS, Keltner JL, Park SS, Werner JS. Visualization of lipofuscin accumulation in Stargardt macular dystrophy by high-resolution Fourier-domain optical coherence tomography. Archives of Ophthalmology, 125(4):575. 2007.. Keltner ...
Mehta, J.S., Vithana, E.N., Tan, D.T.H., Yong, V.H.K., Aung, T., Yam, G.H.F., Law, R.W.K., Pang, C.P. (2008). Analysis of the posterior polymorphous corneal dystrophy 3 gene, TCF8, in late-onset fuchs endothelial corneal dystrophy. Investigative Ophthalmology and Visual Science 49 (1) : 184-188. [email protected] Repository. https://doi.org/10.1167/iovs.07- ...
A port-wine stain is a flat, pink, red, or purple colored birthmark. These are caused by a concentration of dilated tiny blood vessels called capillaries. They usually occur on the head or neck. They may be small, or they may cover large areas of the body. Port-wine stains do not change color when gently pressed and do not disappear over time. They may become darker and thicker when the child is older or as an adult. Port-wine stains on the face may be associated with more serious problems. Skin-colored cosmetics may be used to cover small port-wine stains. The most effective way of treating port-wine stains is with a special type of laser. This is done when the baby is older by a plastic surgery specialist. ...
Purpose: To determine when the mean central corneal thickness (CCT) returns to normal values after uneventful phacoemulsification. Material and Methods: This was a prospective case series. The study was carried out at the Section of Ophthalmology, Department of Surgery, Aga Khan University Hospital, Karachi. Eyes scheduled to undergo phacoemulsification during December 2011 - March 2012 were eligible to be included. Eyes with corneal degenerations, dystrophies or high pre-op astigmatism were excluded. A structured proforma was used to collect data on sociodemographics, comorbids, visual acuity, and CCT before surgery and 1 day, 1 week and 1 month after surgery. Changes in the mean CCT over time were measured using repeated measures Analysis of Variance (ANOVA) was done. Results: Eighty one eyes were included in the study. The mean (±SD) age of the participants was 58.30 (± 10.04) years. The majority of them (58.0%) were women. Sixty two (76.5%) eyes completed the last follow-up and were included in
Besides optic disc evaluation and visual field testing, the diagnosis of ocular hypertension, primary glaucoma and normal-tension glaucoma is based on an arbitrary IOP cutoff point of 21 mmHg [11]. This cutoff is made on the basis of statistical grounds, principally for screening purpose rather than as a diagnostic criterion. It is nevertheless in clinical use and any factor that changes the estimates of IOP can lead to a misclassification of the patient or predisposed individuals [12].. In this study it was found that the mean CCT and IOP among Ethiopian glaucoma patients were 508.07 μm and 19.46 mmHg respectively. This study also showed a statistically significant association between CCT and IOP. Furthermore, CCT was correlated linearly with IOP values (ρ =0.271, p , 0.001). In this study IOP was manipulated with surgery or medication in some, and not in others, and hence this result should be interpreted cautiously as correlation between baseline untreated IOPs and CCT is much more ...

Laser-Assisted Subepithelial Keratectomy (LASEK): Background, History of the Procedure, ProblemLaser-Assisted Subepithelial Keratectomy (LASEK): Background, History of the Procedure, Problem

By retaining a flap of corneal epithelium, LASEK may decrease the risk of infection and incidence of corneal haze, while ... Example of placido based corneal topography. This image depicts a large quantity of "with-the-rule" corneal astigmatism. The ... Example of placido based corneal topography. This image depicts a large quantity of "with-the-rule" corneal astigmatism. The ... Image of corneal haze following refractive surgery, as viewed through a slit lamp. Image courtesy of Ronald R. Krueger, MD, ...
more infohttps://emedicine.medscape.com/article/1222702-overview

2020 Vision Associates Optometry - Optometry In Riverside, CA USA :: Lasik Eye Surgery2020 Vision Associates Optometry - Optometry In Riverside, CA USA :: Lasik Eye Surgery

Corneal Topography. * Corneal Pachymetry. * Schirmers Test. * Ultraviolet Test. * Dyslexia Test. * Photochromic Demonstrations ...
more infohttp://2020riverside.com/lasik.html?page=home

Harbourside Optometry Clinic - Optometry In North Vancouver, BC Canada :: Advanced Visual DiagnosticsHarbourside Optometry Clinic - Optometry In North Vancouver, BC Canada :: Advanced Visual Diagnostics

Corneal thickness measurement is called Pachymetry and more correctly stages the starting Intra Ocular Pressure level in each ... THE PENTACAM - The Gold Standard in Corneal Topography. In a record 2 seconds it generates a corneal map from 25,000 corneal ... Using the corneal interpretation and the axial A scanned length in a formula the Final IOL or intra ocular lens power is ... This can reveal a patient at either early or late stage Keratoconus ( a corneal thinning disease ), It can also read thickness ...
more infohttp://harboursideoptometry.com/advanced-visual-diagnostics.html?page=home

Harbourside Optometry Clinic - Optometry In North Vancouver, BC Canada :: Laser Refractive SurgeryHarbourside Optometry Clinic - Optometry In North Vancouver, BC Canada :: Laser Refractive Surgery

We now do full field Pachymetry on our pre laser patients as well as initial Tonometry (pressure reading levels). Add to this ... Collagen Cross linking is a process to strengthen and expectedly to slow or deter further corneal thinning in a Keratoconic ...
more infohttp://harboursideoptometry.com/eyecare-services/laser-refractive-surgery.html?ada=1

Corneal pachymetry - WikipediaCorneal pachymetry - Wikipedia

Corneal pachymetry is essential for other corneal surgeries such as Limbal Relaxing Incisions. LRI is used to reduce corneal ... think of it as a corneal A-scan. Pachymetry using the corneal waveform allows the user to more accurately measure the corneal ... Pachymetry using the corneal waveform process allows the user to more accurately measure the corneal thickness, verify the ... The study reported that corneal thickness as measured by corneal pachymetry was an accurate predictor of glaucoma development ...
more infohttps://en.wikipedia.org/wiki/Corneal_pachymetry

Corneal Pachymetry - Medical Clinical Policy Bulletins | AetnaCorneal Pachymetry - Medical Clinical Policy Bulletins | Aetna

Corneal pachymetry may also be useful in assessing the response to treatment of corneal transplant rejection. Corneal ... Aetna considers corneal pachymetry to be of no proven value in the work-up of persons prior to cataract surgery unless corneal ... Corneal pachymetry is a non-invasive ultrasonic technique for measuring corneal thickness, and has been used primarily in the ... Corneal pachymetry for evaluation of persons undergoing corneal refractive surgery is excluded from coverage under plans with ...
more infohttp://www.aetna.com/cpb/medical/data/600_699/0681.html

Precision of Corneal Thickness Measurements Obtained Using the Scheimpflug-Placido Imaging and Agreement with Ultrasound...Precision of Corneal Thickness Measurements Obtained Using the Scheimpflug-Placido Imaging and Agreement with Ultrasound...

... mix and contact ultrasound pachymetry on central and midperipheral corneal thickness measured by noncontact optical pachymetry ... An overestimation of CCT and the thinnest corneal thickness (TCT) before corneal refractive surgery could lead to corneal ... In the second part of the study, agreement on corneal thickness as measured using both the TMS-5 and US pachymetry was ... F. W. Price Jr., D. L. Koller, and M. O. Price, "Central corneal pachymetry in patients undergoing laser in situ keratomileusis ...
more infohttps://www.hindawi.com/journals/joph/2015/328798/

Comparison of central corneal thickness measurements by ultrasound pachymetry and 2 new devices, Tonoref III and RS-3000 |...Comparison of central corneal thickness measurements by ultrasound pachymetry and 2 new devices, Tonoref III and RS-3000 |...

Purpose There is currently little evidence assessing the repeatability and accuracy of central corneal thickness measurements ... Effect of corneal hydration on goldmann applanation tonometry and corneal topography. Refract Corneal Surg Thorofare 9:110-117 ... Comparison of central corneal thickness measurements by ultrasound pachymetry and 2 new devices, Tonoref III and RS-3000. ... Tam ES, Rootman DS (2003) Comparison of central corneal thickness measurements by specular microscopy, ultrasound pachymetry, ...
more infohttps://link.springer.com/article/10.1007/s10792-018-0895-1

Use of ultrasonic pachymetry for measurement of changes in corneal thickness in mouse corneal transplant rejection.Use of ultrasonic pachymetry for measurement of changes in corneal thickness in mouse corneal transplant rejection.

The aims of this study were to (1) evaluate a pachymetry technique to measure changes in mouse corne ... Diagnosis of rejection in the mouse model of corneal transplantation is based on subjective judgement of loss of graft ... Corneal Stroma / pathology. Corneal Topography / methods. Corneal Transplantation*. Cryopreservation. Diagnostic Techniques, ... The aims of this study were to (1) evaluate a pachymetry technique to measure changes in mouse corneal thickness and (2) ...
more infohttp://www.biomedsearch.com/nih/Use-ultrasonic-pachymetry-measurement-changes/19822919.html

Intraobserver and interobserver reproducibility in the evaluation of ultrasonic pachymetry measurements of central corneal...Intraobserver and interobserver reproducibility in the evaluation of ultrasonic pachymetry measurements of central corneal...

Purpose: To assess reproducibility of central corneal thickness (CCT) measurement by means of ultrasonic pachymetry. ... Intraobserver and interobserver reproducibility in the evaluation of ultrasonic pachymetry measurements of central corneal ... Intraobserver and interobserver reproducibility in the evaluation of ultrasonic pachymetry measurements of central corneal ... Conclusions: The measurement of CCT by means of ultrasonic pachymetry is highly reproducible. ...
more infohttps://bjo.bmj.com/content/88/2/174.abstract

Corneal densitometry and its correlation with age, pachymetry, corneal curvature, and refraction  
    - E-Prints ComplutenseCorneal densitometry and its correlation with age, pachymetry, corneal curvature, and refraction - E-Prints Complutense

Corneal densitometry and its correlation with age, pachymetry, corneal curvature, and refraction ... Corneal densitometry and its correlation with age, pachymetry, corneal curvature, and refraction. International Ophthalmology ... Corneal densitometry increases with age, but corneal keratometry and refractive parameters do not affect light scattering in ... Corneal densitometry was expressed in standardized grayscale units (GSU).. Results: the mean corneal densitometry over the ...
more infohttps://eprints.ucm.es/43551/

Comparison of Central Corneal Thickness Measurements by Visante Anterior Segment Oct With Ultrasound Pachymetry | IOVS | ARVO...Comparison of Central Corneal Thickness Measurements by Visante Anterior Segment Oct With Ultrasound Pachymetry | IOVS | ARVO...

Comparison of Central Corneal Thickness Measurements by Visante Anterior Segment Oct With Ultrasound Pachymetry ... Comparison of Central Corneal Thickness Measurements by Visante Anterior Segment Oct With Ultrasound Pachymetry ... Comparison of Central Corneal Thickness Measurements by Visante Anterior Segment Oct With Ultrasound Pachymetry. Invest. ... The mean CCT measured by AS-OCT and ultrasound pachymetry were 527.0 ± 34.1 and 542.3 ± 36.7 respectively. CCT as measured by ...
more infohttps://iovs.arvojournals.org/article.aspx?articleid=2386630

Global Corneal Pachymetry Market 2017 - Reichert, DGH Technology, Tomey, Micro Medical Devices, NIDEKGlobal Corneal Pachymetry Market 2017 - Reichert, DGH Technology, Tomey, Micro Medical Devices, NIDEK

The Corneal Pachymetry Market Research Report is a professional and in-depth study on industry Size, Share, Trends, Growth, ... The report has been compiled with the intent of presenting a 360 degree snapshot of the global Corneal Pachymetry market to the ... Global Corneal Pachymetry Market 2017 - Reichert, DGH Technology, Tomey, Micro Medical Devices, NIDEK. By ... To study the competitive landscape of the Corneal Pachymetry market in detail, key industry participants are profiled in the ...
more infohttps://aperturegames.com/6102/global-corneal-pachymetry-market-2017-2022/

Central corneal thickness measurements with optical coherence tomography and ultrasound pachymetry in healthy subjects and in...Central corneal thickness measurements with optical coherence tomography and ultrasound pachymetry in healthy subjects and in...

Central corneal thickness measurements with optical coherence tomography and ultrasound pachymetry in healthy subjects and in ... Central corneal thickness measurements with optical coherence tomography and ultrasound pachymetry in healthy subjects and in ... To compare central corneal thickness measurements made using two different methods, optical coherence tomography (OCT) and ... In this prospective study, central corneal thickness was measured in 20 normal subjects (normal group) and in 20 PRK patients ...
more infohttp://www.octnews.org/articles/961949/central-corneal-thickness-measurements-with-optica/

Corneal pachymetry - Mr Anish Shah FRCOphthCorneal pachymetry - Mr Anish Shah FRCOphth

This is the measurement of corneal thickness - usually the central corneal thickness (CCT). Why is pachymetry performed? There ... to monitor corneal endothelial dysfunction (eg in Fuchs… ... What is corneal pachymetry?. This is the measurement of corneal ... How is pachymetry performed?. There are a variety of different machines that are capable of measuring corneal thickness, ... to monitor corneal endothelial dysfunction (eg in Fuchs endothelial dystrophy). *prior to surgery involving corneal relaxing ...
more infohttps://mrshah.org/tests/corneal-pachymetry/

Corneal Transplant Surgery | corneal surgeon | keratoplasty | Duke HealthCorneal Transplant Surgery | corneal surgeon | keratoplasty | Duke Health

... to restore vision impaired by corneal disease, scarring, trauma, or infection. ... Duke corneal surgeons perform corneal transplant surgery (keratoplasty) ... Corneal Pachymetry. Ultrasound waves measure the thickness of your cornea.. Optical Coherence Tomography. OCT is a non-contact ... Choosing a Corneal Transplant Surgeon. Advanced Training in Corneal Disease Management Our corneal surgeons are ...
more infohttps://www.dukehealth.org/treatments/eye-care/corneal-transplant-surgery

June 2013 - Volume 32 - Issue 6 : CorneaJune 2013 - Volume 32 - Issue 6 : Cornea

Central Corneal Thickness Measurements With Different Imaging Devices and Ultrasound Pachymetry. Tai, Lai-Yong; Khaw, Keat-Ween ... Corneal Thickness as a Predictor of Corneal Transplant Outcome. Verdier, David D.; Sugar, Alan; Baratz, Keith; More ... Correlation of the Corneal Toricity Between Anterior and Posterior Corneal Surfaces in the Normal Human Eye. Montalbán, Raúl; ... Long-term Corneal Clarity After Spontaneous Repair of an Iatrogenic Descemetorhexis in a Patient With Fuchs Dystrophy. Koenig, ...
more infohttps://journals.lww.com/corneajrnl/Fulltext/2013/06000/href

Contact Lens Clinic, Corneal Transplant, Corneal Ulcer, Topography, Pachymetry, Keratoconus Treatment, Corneal Crosslinking,...Contact Lens Clinic, Corneal Transplant, Corneal Ulcer, Topography, Pachymetry, Keratoconus Treatment, Corneal Crosslinking,...

Keratometry (Measuring corneal curvature). Tear function test (Shirmers strip). Slit lamp examination for eye evaluation and ... Fungal keratitis is of growing concern amongst contact lens wearers, and is a serious and painful corneal disease caused by a ...
more infohttps://www.newsightlasikcenter.com/eye_care_for_contact_lens_users.htm

glaucoma suspect - Eye Care - MedHelpglaucoma suspect - Eye Care - MedHelp

1) corneal pachymetry. 2) IOP measurement 3) gonioscopy 4)OCT 5) Visual fields I am not aware of which migraine prophylaxis can ... 1) corneal pachymetry. 2) IOP measurement 3) gonioscopy 4)OCT 5) Visual fields I am not aware of which migraine prophylaxis can ... i did have my corneal thickness measured and it was normal, which makes the IOP accurate? i had an OCT about four years ago, ... i did have my corneal thickness measured and it was normal, which makes the IOP accurate? i had an OCT about four years ago, ...
more infohttp://www.medhelp.org/posts/Eye-Care/glaucoma-suspect/show/997232

Corneal Biomechanical Changes after Crosslinking for Progressive Keratoconus with the Corneal Visualization Scheimpflug...Corneal Biomechanical Changes after Crosslinking for Progressive Keratoconus with the Corneal Visualization Scheimpflug...

Despite the known initial decrease of the pachymetry after CXL, none of the analyzed parameters indicated a progression of the ... i,Methods.,/i, Corneal visualization Scheimpflug technology analyses (research software version 6.07r08) of subjects with ... i,Subjects and Controls.,/i, Seventeen eyes of patients treated with corneal crosslinking for progressive keratoconus. , ... the central corneal pachymetry (pachy; mean: −35 ,i,µ,/i,m, ,svg xmlns:xlink=http://www.w3.org/1999/xlink xmlns=http://www. ...
more infohttps://www.hindawi.com/journals/joph/2014/579190/

Are you a Candidate? - About Your Vision - LASIK - Flaum Eye Institute - University of Rochester Medical CenterAre you a Candidate? - About Your Vision - LASIK - Flaum Eye Institute - University of Rochester Medical Center

Corneal Thickness Measurement (Pachymetry): LASIK removes a small amount cornea tissue permanently. We want to make sure that ... Orbscan Corneal Topographer: The shape and power of your cornea is a very important detail in determining safety for treatment. ...
more infohttps://www.urmc.rochester.edu/eye-institute/lasik/about-vision/candidate.aspx

Glaucoma - Mayo ClinicGlaucoma - Mayo Clinic

Measuring corneal thickness (pachymetry). *Inspecting the drainage angle (gonioscopy). The damage caused by glaucoma cant be ...
more infohttps://www.mayoclinic.org/diseases-conditions/glaucoma/basics/definition/con-20024042?tab=multimedia&p=1

Comparison of Central Corneal Thickness Measurements by Pentacam, Orbscan II, Visante Anterior Segment Optical Coherence...Comparison of Central Corneal Thickness Measurements by Pentacam, Orbscan II, Visante Anterior Segment Optical Coherence...

... and ultrasound pachymetry (USP).Methods: Prospective study. Fifty normal subjects (100 eyes) underwent sequential measurements ... Comparison of Central Corneal Thickness Measurements by Pentacam, Orbscan II, Visante Anterior Segment Optical Coherence ... Comparison of Central Corneal Thickness Measurements by Pentacam, Orbscan II, Visante Anterior Segment Optical Coherence ... C. E. Wheeldon, R. L. Niederer, C. N. J. McGhee; Comparison of Central Corneal Thickness Measurements by Pentacam, Orbscan II, ...
more infohttps://iovs.arvojournals.org/article.aspx?articleid=2367467
  • By retaining a flap of corneal epithelium, LASEK may decrease the risk of infection and incidence of corneal haze, while reducing recovery time and postoperative discomfort when compared with PRK. (medscape.com)
  • Corneal pachymetry for evaluation of persons undergoing corneal refractive surgery is excluded from coverage under plans with these provisions. (aetna.com)
  • An overestimation of CCT and the thinnest corneal thickness (TCT) before corneal refractive surgery could lead to corneal stroma overablation, especially in eyes with a high degree of myopia or borderline corneal thickness or that require enhancement surgeries, and can also increase the risk of keratectasia [ 3 ]. (hindawi.com)
  • Randleman JB, Woodward M, Lynn MJ, Stulting RD (2008) Risk assessment for ectasia after corneal refractive surgery. (springer.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)
  • 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)
  • PURPOSE: The purpose of this study was to evaluate outcomes of Descemet's stripping automated endothelial keratoplasty (DSAEK) using anterior stromal flawed (ASF) donor corneas that were unsuitable for use in full-thickness penetrating keratoplasty as a result of stromal scars, pterygia, or previous corneal refractive surgery and to compare results with DSAEK using standard tissue. (biomedsearch.com)
  • Chicago -Intensive dosing with levofloxacin ophthalmic solution 1.5% (Iquix, Vistakon Pharmaceuticals) for 2 weeks did not demonstrate any adverse effects on the integrity and morphology of the corneal endothelium in humans, according to the study presented by Mark Abelson, MD, at the American Society of Cataract and Refractive Surgery annual meeting. (ophthalmologytimes.com)
  • The possibility remains that ectasia was due to an unidentified risk factor or an intrinsic corneal problem with this patient's right eye. (harvard.edu)
  • 1) Ectasia resulting from an unknown alteration in the biomechanical strength can lead to loss of best-corrected visual acuity and the need for a corneal transplant in severe cases. (harvard.edu)
  • It is not known to be associated with progressive corneal ectasia. (ovid.com)
  • In this report, we examine the course of a patient with PACD who developed bilateral keratoglobus-type corneal ectasia. (ovid.com)
  • In this case report, we illustrate progressive corneal ectasia in a patient with PACD. (ovid.com)
  • Contact with a patient's eyes could cause discomfort or even damage the corneal epithelium [ 8 ]. (hindawi.com)
  • By retaining a flap of corneal epithelium, LASEK may decrease the risk of infection and incidence of corneal haze, while reducing recovery time and postoperative discomfort when compared with PRK. (medscape.com)
  • 5. The method of claim 4 or claim 3, claim 2 or claim 1, in which the area of epithelium-layer removal has peripherally continuous overlap with and is thus at least incrementally greater than the corneal area of irradiation exposure. (google.com)
  • Corneal Epithelial Remodeling After Standard Epithelium-off Corneal Cross-linking in Keratoconic Eyes. (cornea.org)
  • Purpose: to determine normative corneal densitometry values in relation to age, sex, refractive error, corneal thickness, and keratometry, measured using the Oculus Pentacam system. (ucm.es)
  • Conclusions: this is the first report of normative corneal densitometry values in relation to keratometry, corneal thickness, and spherical equivalent measured with the latest Oculus Pentacam software. (ucm.es)
  • Corneal pachymetry was performed and epithelial and stromal thicknesses (central and 16 points on the 6-mm central zone) and the maximum simulated keratometry value (Kmax) were measured. (healio.com)
  • Corneal thickness did swell significantly among mountaineers at elevations up to 6,300 meters (about 21,000 feet), but they had no loss in visual acuity, Martina Monika Bosch, MD, of University Hospital Zurich in Switzerland, and colleagues reported in the February Archives of Ophthalmology . (medpagetoday.com)
  • Corneal dystrophies (CDs) are defined as a group of inherited, bilateral, symmetric, slowly progressive corneal diseases without any relationship to environmental or systemic factors. (molvis.org)
  • For the enrolled patients, the Ocular Hypertension Treatment Study results identified central corneal thickness less than 556 microns and a vertical or horizontal cup to disc ratio greater than 0.4 (vertical or horizontal) as risk factors for glaucomatous damage. (aetna.com)
  • However, the conclusions of OHTS are limited to persons with ocular hypertension (greater than 24 mm Hg), and do not establish the value of corneal pachymetry for screening persons without ocular hypertension. (aetna.com)
  • 153 women) with no corneal disease underwent an exhaustive ocular examination. (ucm.es)
  • Mean ocular and corneal coma were not increased postoperatively. (healio.com)
  • The mean percentages of hexagonal cells in the corneal endothelium at baseline were 59.8 ± 10.8 compared with 61.9 ± 11.3 after dosing. (ophthalmologytimes.com)
  • Based on those findings, Dr. Abelson concluded that intensive dosing with levofloxacin 1.5% does not adversely affect the corneal endothelium. (ophthalmologytimes.com)
  • Introduced in 2003, corneal crosslinking (CXL) was the first treatment aimed at the pathogenetic cause of KC by potentially changing the intrinsic biomechanical properties of the corneal collagen [ 2 ]. (hindawi.com)
  • Corneal collagen cross-linking is performed as a single treatment. (clinicaltrials.gov)
  • Subjects are followed for 12 months after the procedure to evaluate the long term effects of corneal collagen cross-linking. (clinicaltrials.gov)
  • Current treatment modalities include excimer laser ablation of the corneal periphery via either photorefractive keratoplasty (PRK) or LASIK and shrinkage of collagen in a circular pattern in the corneal periphery (eg, LTK). (medscape.com)
  • Although both conditions may represent changes in the structure and integrity of corneal collagen, whether an association exists between the 2 conditions is unknown. (ovid.com)
  • Central corneal thickness measurements should be performed before cutting to avoid tissue perforation. (biomedsearch.com)
  • Tiny bits of the limbal tissue were explanted on the de-epithelialised human amniotic membrane prepared following standard guidelines, and cultured using Human Corneal Epithelial cell medium. (ijo.in)
  • During multiple recheck examinations over 4 months, the ulcer was treated by debridement with a sterile cotton-tipped applicator, diamond burr debridement, diamond burr debridement with cyanoacrylate tissue adhesive, and grid keratotomy with cyanoacrylate tissue adhesive, all performed under anesthesia with eventual resolution of the corneal ulcer. (thefreedictionary.com)
  • Your corneal surgeon will conduct a thorough examination of your eye and its structures using a variety of imaging devices to help diagnose any corneal disorders or diseases. (dukehealth.org)
  • A newer transpalpebral and transsleral tonometry method is not influenced by corneal biomechanics and does not need to be adjusted or corneal irregularities as measurement is done over upper eyelid and sclera. (wikipedia.org)
  • Corneal Dystrophies - No Boring Colibris]. (nih.gov)
  • Identification of novel mutations, the presence of phenotypic variability, and the genetic heterogeneity seen in our cases stress the need for mandatory screening of TGFBI for precise diagnosis and classification of corneal dystrophies. (molvis.org)
  • Aetna considers corneal pachymetry to be of no proven value in the work-up of persons prior to cataract surgery unless corneal disease is documented. (aetna.com)
  • A study of congenital eye disease at a teaching hospital in Sagamu, Nigeria, found that corneal opacities is the fourth most common congenital eye disorder causing blindness in 5.7% of infants with congenital eye diseases (Bodunde et al, 2006). (aao.org)
  • The TMS-5 shows good repeatability and reproducibility for measuring CCT and TCT in normal subjects but only moderate agreement with US pachymetry results. (hindawi.com)
  • Several studies have shown that the Pentacam, Sirius, and Galilei provide reliable CCT and TCT measurements [ 9 , 10 ] and that these devices offer good repeatability and reproducibility comparable to US pachymetry in both normal and postsurgery eyes. (hindawi.com)
  • Corneal pachymetry is essential for other corneal surgeries such as Limbal Relaxing Incisions. (wikipedia.org)
  • Buratto performed excimer laser ablation on the posterior surface of the resected corneal disc before replacing and resuturing it back to its original position. (medscape.com)
  • At 6 months postoperatively, localized corneal epithelial thinning was observed in the superior ( P = .026), inferior ( P = .034), inferonasal ( P = .024), and nasal ( P = .035) areas at 3 mm and in the superior ( P = .039), nasal ( P = .043), and inferior ( P = .01) areas at 6 mm in the SCXL group. (healio.com)
  • Localized corneal epithelial thinning was observed at 3 ( P = .04) and 6 ( P = .01) mm in the inferior area in the I-CXL group. (healio.com)
  • Table 2 highlights the differential diagnosis of infantile corneal opacities and the method of diagnosis. (aao.org)
  • Prof. Bolz's medical emphases are surgical cataract treatment, corneal and retinal surgery and the diagnosis of retinal conditions. (leading-medicine-guide.com)