corneal topography


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Related to corneal topography: keratoconus

corneal topography

The use of a camera and a computer to make a three-dimensional map of the cornea of the eye, typically in preparation for surgery.
Synonym: videokeratography
See also: topography

corneal topography 

A map of the variations in the curvature (and power) of the anterior surface of the cornea. The typical map shows that the average adult cornea is steeper in the vertical than in the horizontal meridian and has the form of a flattening ellipsoid. It is typically done with a photo-keratoscope or a videokeratoscope. Cornealtopography can also be determined with a scanning-slit topographer, in which a computerized system integrates a series of slit-beam images to produce a map of the curvature and elevation of the anterior and posterior surfaces enabling a diagnosis of anterior and posterior keratoconus, and indirectly providing a measurement of corneal thickness. See keratoscope; photokeratoscopy; videokeratoscope.
References in periodicals archive ?
Corneal topography is the gold standard in keratoconus diagnosis.
Assort is currently negotiating with makers of refractive lasers and corneal topography machines to include Alpins' method in the programming of their equipment.
We used Sirius corneal tomographer (CSO, Italy), one of the latest corneal topography devices that combines Scheimpflug imaging with Placido-disc topography, and Confoscan-4 (Tokyo, Japan) with 20x probe, which images a wider field of view compared to other confocal systems and counts up to 1000 cells per exam.
The clinical diagnosis of keratoconus was based on corneal topography, pachymetry values, specular analysis, visual acuity.
Laser refractive surgery remains the treatment of choice in patients with astigmatism of less than 6D who are not yet presbyopic, providing patients fulfil the standard safety criteria for laser vision correction such as a normal corneal topography (regular astigmatism) and an adequate tear film.
Tenders are invited for Advanced Corneal Topography (1 No.
Materials and Methods: Anterior segment parameters and corneal densitometry of patients with RA and healthy control subjects were assessed by Scheimpflug corneal topography.
Objective: To determine the Efficacy of Corneal Crosslinkage (CXL), using Corneal Topography, in eyes with progressive Keratoconus.
Though it gives good vision and early rehabilitation, it has complications like, interface keratitis, interface haze, DM folds and wrinkling and altered corneal topography in DALK and graft dislocation and risk of graft rejection in DSEK which can be overcome by meticulous surgery and post-operative management and careful follow up.