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Proceedings Paper

Evaluation of entire-cornea topography measurement
Author(s): Fergal P. Shevlin; Stanley A. Klein; Robert B. Mandell; Thom Carney
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Paper Abstract

We quantitatively evaluated a technique for combining multiple videokeratograph views of different areas of cornea. To achieve this we first simulated target reflection from analytic descriptions of various shapes believed to mimic common corneal topographies. The splicing algorithm used the simulated reflections to achieve a good quality estimation of the shapes. Actual imagery was then acquired of manufactured models of the same shapes and the splicing algorithm was found to achieve a less perfect estimation. The cause was thought mainly to be image blur due to defocus. To investigate this, blur was introduced into the reflection simulation, and the results of the splicing algorithm compared to those found from the actual imagery.

Paper Details

Date Published: 7 June 2000
PDF: 7 pages
Proc. SPIE 3908, Ophthalmic Technologies X, (7 June 2000); doi: 10.1117/12.387538
Show Author Affiliations
Fergal P. Shevlin, Trinity College (Ireland)
Stanley A. Klein, Univ. of California/Berkeley (United States)
Robert B. Mandell, Univ. of California/Berkeley and Neurometrics Institute (United States)
Thom Carney, Neurometrics Institute (United States)


Published in SPIE Proceedings Vol. 3908:
Ophthalmic Technologies X
Pascal O. Rol; Karen Margaret Joos; Fabrice Manns, Editor(s)

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