Evaluation of entire-cornea topography measurement

Fergal P. Shevlin; Stanley A. Klein; Robert B. Mandell; Thom Carney

doi:10.1117/12.387538

7 June 2000 Evaluation of entire-cornea topography measurement

Fergal P. Shevlin, Stanley A. Klein, Robert B. Mandell, Thom Carney

Proceedings Volume 3908, Ophthalmic Technologies X; (2000) https://doi.org/10.1117/12.387538
Event: BiOS 2000 The International Symposium on Biomedical Optics, 2000, San Jose, CA, United States

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.

Citation Download Citation

Fergal P. Shevlin, Stanley A. Klein, Robert B. Mandell, and Thom Carney "Evaluation of entire-cornea topography measurement", Proc. SPIE 3908, Ophthalmic Technologies X, (7 June 2000); https://doi.org/10.1117/12.387538

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