Optical comparison of multizone and single zone photo-refractive keratectomy

Xóchitl González-Cirre; Fabrice Manns; Pascal O. Rol; Jean Marie A. Parel

doi:10.1117/12.275115

Optical comparison of multizone and single zone photo-refractive keratectomy

Xóchitl González-Cirre, Fabrice Manns, Pascal O. Rol, Jean Marie A. Parel

Research output: Contribution to journal › Conference article › peer-review

Abstract

Purpose: To calculate and compare the point-spread function (PSF) and the central ablation depth (CAD) of a paraxial eye model after photo-refractive keratectomy (PRK), with single and multizone treatments. Method: 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. Results: At equal CAD, the optical image quality is better after single zone treatments. Conclusion: Multizone treatments do not seem to be advantageous optically.

Original language	English (US)
Pages (from-to)	164-170
Number of pages	7
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	2971
DOIs	https://doi.org/10.1117/12.275115
State	Published - Dec 1 1997
Event	Ophthalmic Technologies VII - San Jose, CA, United States Duration: Feb 8 1997 → Feb 8 1997

Keywords

Eye model
Photo-refractive keratectomy
Ray-tracing

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.275115

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title = "Optical comparison of multizone and single zone photo-refractive keratectomy",

abstract = "Purpose: To calculate and compare the point-spread function (PSF) and the central ablation depth (CAD) of a paraxial eye model after photo-refractive keratectomy (PRK), with single and multizone treatments. Method: 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. Results: At equal CAD, the optical image quality is better after single zone treatments. Conclusion: Multizone treatments do not seem to be advantageous optically.",

keywords = "Eye model, Photo-refractive keratectomy, Ray-tracing",

author = "X{\'o}chitl Gonz{\'a}lez-Cirre and Fabrice Manns and Rol, {Pascal O.} and Parel, {Jean Marie A.}",

year = "1997",

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journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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publisher = "SPIE",

note = "Ophthalmic Technologies VII ; Conference date: 08-02-1997 Through 08-02-1997",

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TY - JOUR

T1 - Optical comparison of multizone and single zone photo-refractive keratectomy

AU - González-Cirre, Xóchitl

AU - Manns, Fabrice

AU - Rol, Pascal O.

AU - Parel, Jean Marie A.

PY - 1997/12/1

Y1 - 1997/12/1

N2 - Purpose: To calculate and compare the point-spread function (PSF) and the central ablation depth (CAD) of a paraxial eye model after photo-refractive keratectomy (PRK), with single and multizone treatments. Method: 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. Results: At equal CAD, the optical image quality is better after single zone treatments. Conclusion: Multizone treatments do not seem to be advantageous optically.

AB - Purpose: To calculate and compare the point-spread function (PSF) and the central ablation depth (CAD) of a paraxial eye model after photo-refractive keratectomy (PRK), with single and multizone treatments. Method: 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. Results: At equal CAD, the optical image quality is better after single zone treatments. Conclusion: Multizone treatments do not seem to be advantageous optically.

KW - Eye model

KW - Photo-refractive keratectomy

KW - Ray-tracing

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