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Proceedings Paper

Corneal modeling using conic section fits of PAR corneal topography system measurements
Author(s): Stanley Zipper; Fabrice Manns; Viviana Fernandez; Samith Sandadi; Arthur Ho; Jean-Marie A. Parel
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Paper Abstract

The purpose of this study was to measure the average shape and variability of human corneas and to develop a tool for analyzing, height, curvature, and aberrations based on a conic section model. Fresh Eye Bank Eyes were placed in Dextran until the corneal thickness reached a physiological value. The eyes were placed in a custom made holder and measured using an intraoperative PAR Corneal Topography System (CTS) mounted on an operation microscope. Topography was measured before and after removal of the epithelium. A series of MATLAB functions were written to analyze the raw-z (height) data in polar coordinates. The functions fit conic sections to the PAR CTS data along hemi-meridians at 5 degree(s) intervals. The conic shape factor and apical radius were used to calculate and display the curvature. The dependence of these parameters with meridional position was examined.

Paper Details

Date Published: 7 June 2001
PDF: 6 pages
Proc. SPIE 4245, Ophthalmic Technologies XI, (7 June 2001); doi: 10.1117/12.429261
Show Author Affiliations
Stanley Zipper, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine and Cornell Univ. (United States)
Fabrice Manns, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine and Univ. of Miami (United States)
Viviana Fernandez, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)
Samith Sandadi, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine and Univ. of Miami (United States)
Arthur Ho, Univ. of New South Wales (Australia)
Jean-Marie A. Parel, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine and Univ. of Miami (United States)


Published in SPIE Proceedings Vol. 4245:
Ophthalmic Technologies XI
Fabrice Manns; Per G. Soederberg; Arthur Ho, Editor(s)

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