Results 241 to 250 of about 400,914 (301)
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The Effect of Trephination on Corneal Topography
Ophthalmic Surgery, Lasers and Imaging Retina, 1995* BACKGROUND AND OBJECTIVE: A prospective study was performed to assess the effect of trephination on corneal curvature. * MATERIALS AND METHODS: Thirty-seven fresh porcine globes with intact corneal epithelium were used. Radius of curvature, central dioptric power, and powers and axes of the steepest and flattest meridians were obtained ...
David S. Greenfield +2 more
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Methods of Analysis of Corneal Topography
Journal of Refractive Surgery, 1989ABSTRACT: The visual inspection of photokeratoscope mires permits the diagnosis of advanced anomalies in corneal shape and is an extremely useful adjunct to keratometry and slit-lamp microscope examination. However, corneal distortions too small to be appreciated by visual inspection of keratographs can seriously degrade visual acuity. In this article,
Stephen D. Klyce, Steven E. Wilson
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Corneal Topography and the Hirschberg Test.
Ophthalmic and Visual Optics, 1991An alternative approach to the problem of reconstucting the topography of the cornea by measurement of images formed by the corneal reflecting surface may be had by considering the effect of aspherical corneal topography on the "Hirschberg Test," a traditional clinical maneuver for the estimation of ocular misalignment.
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Corneal topography and contact lenses [PDF]
Ophthalmology Clinics of North America, 2003 Regardless of whether CVK is used qualitatively for RGP lens design selection or quantitatively in RGP parameter selection, it has a significant role in contact lens practice. Further advancements and testing on CVK-based RGP fitting modules and fluorescein simulations will make CVK an invaluable tool for the RGP lens fitter.
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The Topography of Corneal Astigmatism
European journal of Implant and Refractive Surgery, 1994This article discusses the role of computerized videokeratoscopic topography in analysing corneal astigmatism. It describes and explains the normal topographical astigmatic patterns, an understanding of which is essential for the interpretation of corneal topographic maps.
David P.S. O'Brart +3 more
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CORNEAL TOPOGRAPHY: A CLINICAL MODEL
Ophthalmic and Physiological Optics, 1986A keratometric photokeratoscopic study of 220 eyes representative of a normal population leads to the ellipsoid corneal model proposed. This model is applicable to the design of rigid corneal lenses and to the calculation of computer models of the dioptric system of the eye.
Donald P. M. Lydon +2 more
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Artificial intelligence applications in different imaging modalities for corneal topography.
Survey of ophthalmology, 2021S. Shanthi +5 more
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The Topography of Corneal Disease
European journal of Implant and Refractive Surgery, 1995This article is the seventh in a series which describes the role of computerized videokeratoscopy and highlights its value in different clinical settings. It illustrates and describes the variety of topographic patterns seen with corneal disease.
David P.S. O'Brart +2 more
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Topography of Corneal Sensitivity [PDF]
, 1984 It was absolutely mandatory to establish an exact profile of corneal sensitivity in order to appreciate the results of clinical measurements. Only this would allow us to evaluate clinical problems of threshold changes. We therefore measured the corneal sensitivity at thirteen different areas of 20 to 40 year-old subjects. The measurements were taken on
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The Assessment of Corneal Topography
European journal of Implant and Refractive Surgery, 1994This article is the first of a series which describes the role of corneal topography, and highlights its value in different clinical settings. The illustrations will form an atlas of corneal topographic maps, whilst the text will be a guide to the potential benefits and pitfalls of corneal topographic analysis. This article describes the principles of
David P.S. O'Brart +3 more
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