topography

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Related to Corneal topography: keratoconus

topography

The contours of land—such as flat, rolling, or steep.

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Corneal Topography with Scheimpflug imaging and videokeratography: comparative study of normal eyes.
Kmax: maximal keratometry reading measured by the corneal topography; CCT: central corneal thickness measured by ultrasonic pachymeter or by OCT; CH: corneal hysteresis; CRF: corneal resistance factor measured with the Ocular Response Analyzer.
Editor Amar Agarwal presents students, academics, and medical professionals working in a wide variety of contexts with a comprehensive textbook focused on corneal topography, topography-assisted laser treatment of the eye, Pentacam and its clinical usage, and Orbascan and other topographical technology.
After an overview of corneal topography and tomography, a map-based approach to diagnosis and evaluation covers axial curvature maps, anterior and posterior elevation maps, and pachymetric maps.
Auto mated keratoconus screening with corneal topography analysis.
Recently, however, some companies are linking refractive surgery lasers to corneal topography machines, which results in surgery based entirely on the cornea's shape, thus disregarding the refractive astigmatism correction.
The diagnosis of unilateral keratoconus was defined as having a keratometric astigmatism below 1.5 diopter (D), vertical keratometry (K) value below 47.0 D, and no keratoconus patterns on corneal topography in this study.
Ageing can alter the human corneal topography, with a detected increase in aberrations [8] and an altered pattern of corneal astigmatism [9].
The new GSA has no risk of infections and operator dependent errors, and gives additional information of corneal topography and anterior eye segment.
Investigations such as corneal topography (using Galilei-G4) and ultrasound pachymetry were performed.
Effect of pterygium surgery on corneal topography. Eur J Ophthalmol 2008;18(2):177-81.