Results 261 to 270 of about 940,455 (303)
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Corneal thickness measured by interferometry
Journal of the Optical Society of America, 1975An optical method for measuring the thickness of transparent structures has been developed, and has been used to measure, in vivo, the thickness of the human cornea. The thickness is measured by placing the anterior surface of the cornea at the focus of a beam of coherent laser light and then measuring the spacing between the interference fringes ...
D G, Green, B R, Frueh, J M, Shapiro
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Ultrasound biomicroscopic corneal thickness measurement for corneal thickness mapping
Japanese Journal of Ophthalmology, 1997Digitalized ultrasound biomicroscopic measurements of vertical cross sections from a 5 mm diameter area of the central cornea of normal and morbid eyes were used to create a computerized corneal thickness map. Mean corneal thickness in normal eyes was 0.503 +/- 0.027 mm; the coefficient of variation, an index of reproducibility, was < 10% in all eyes.
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The Repeatability of Corneal Thickness Measures
Cornea, 2000To compare the repeatability of three measures of corneal thickness: Orbscan Slitscan pachymetry, ultrasound pachymetry, and optical pachymetry.Twenty normal subjects were tested on three occasions. Two occurred on the same day and the third was on a different day at approximately the same time of day as one of the first two visits.
M W, Marsich, M A, Bullimore
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Corneal Thickness at High Altitude
Cornea, 2007The eye, like other organs, is affected by the hypobaric hypoxia of high altitude. Corneal swelling is known to occur under hypoxic conditions at sea level, for instance when wearing contact lenses. The aim of this study was to measure central corneal thickness (CCT) in lowlanders ascending to altitude.The Apex 2 medical research expedition provided ...
Daniel S, Morris +5 more
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Impact of Corneal Toricity on the Distribution of Corneal Epithelial Thickness
Journal of Refractive Surgery, 2023Purpose: To investigate the impact of corneal toricity on the distribution characteristics of corneal epithelial thickness (CET). Methods: A total of 330 eyes in 330 healthy participants were included in this study.
Jiafan, Zhang +5 more
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ON THE OPTICAL MEASUREMENT OF CORNEAL THICKNESS
Acta Ophthalmologica, 1971The optical measurement of corneal thickness based on oblique viewing of the optical section of the cornea is complicated by the finite width of the incident slit beam. In this report the theoretical and practical aspects of the effect of the slit width on the thickness reading are analysed.
N, Ehlers, F K, Hansen
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Central corneal thickness in glaucoma
Current Opinion in Ophthalmology, 2017The purpose of this review is to summarize the role of central corneal thickness (CCT) in the clinical management of a glaucoma patient.The prognostic value of CCT is well recognized in patients with ocular hypertension. However, its predictive value in other glaucoma suspects and patients with established glaucoma is less certain.
Chelvin C A, Sng +2 more
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The genetics of central corneal thickness
British Journal of Ophthalmology, 2009Evidence in the recent literature has highlighted the importance of central corneal thickness (CCT) in relation to several ocular and non-ocular conditions. Most notably, thinner CCT has been identified as a risk factor for open-angle glaucoma. Despite having an extensive knowledge of the structure and function of the cornea, little is known about the ...
Dimasi, David Paul +2 more
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Intrasubject Corneal Thickness Asymmetry
Journal of Refractive Surgery, 2008Purpose To establish the normal distribution for intrasubject (right eye/left eye) central corneal pachymetry in a refractive surgery population. Methods A retrospective analysis was performed on 1448 eyes of 724 consecutive patients evaluated for refractive surgery.
Stephen S, Khachikian +2 more
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Corneal thickness and axial length
American Journal of Ophthalmology, 2005A thin central cornea has been reported to be a risk factor for developing primary open-angle glaucoma among ocular hypertensive eyes. A thin scleral bed of lamina cribrosa seen in deeply excavated optic nerves in glaucomatous eyes is a quintessential finding in advanced glaucomatous eyes. Association between thin cornea and weak sclera contributing to
Mitsugu, Shimmyo, Paul N, Orloff
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