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Proceedings Paper

Optical comparison of multizone and single-zone photorefractive keratectomy
Author(s): Xochitl Gonzalez-Cirre; Fabrice Manns; Pascal O. Rol; Jean-Marie A. Parel
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Paper Abstract

The purpose is to calculate and compare the point-spread function and the central ablation depth (CAD) of a paraxial eye model after photo-refractive keratectomy (PRK), with single and multizone treatments. A modified Le Grand-El Hage paraxial eye model, with a pupil diameter ranging from 2 to 8 mm was used. Ray-tracing was performed for initial myopia ranging from 1 to 10D; after single zone PRK; after double zone PRK; and after tripe zone PRK. The ray-tracing of a parallel incident beam was calculated by using the paraxial matrix method. At equal CAD, the optical image quality is better after single zone treatments. Multizone treatments do not seem to be advantageous optically.

Paper Details

Date Published: 26 May 1997
PDF: 7 pages
Proc. SPIE 2971, Ophthalmic Technologies VII, (26 May 1997); doi: 10.1117/12.275115
Show Author Affiliations
Xochitl Gonzalez-Cirre, Bascom Palmer Eye Institute/Univ. of Miami (United States)
Fabrice Manns, Bascom Palmer Eye Institute/Univ. of Miami (United States)
Pascal O. Rol, Bascom Palmer Eye Institute/Univ. of Miami (USA) & Univ. of Zurich (Switzerland)
Jean-Marie A. Parel, Bascom Palmer Eye Institute/Univ. of Miami (USA) & Univ. of Zurich (Switzerland)


Published in SPIE Proceedings Vol. 2971:
Ophthalmic Technologies VII
Pascal O. Rol; Karen Margaret Joos; Fabrice Manns, Editor(s)

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