Optical comparison of multizone and single zone photo-refractive keratectomy

被引：0
|
作者：
GonzalezCirre, X
Manns, F
Rol, P
Parel, JM
机构：
来源：
OPHTHALMIC TECHNOLOGIES VII, PROCEEDINGS OF | 1997年 / 2971卷
关键词：
photo-refractive keratectomy; ray-tracing; eye model;
D O I：
10.1117/12.275115
中图分类号：
R77 [眼科学];
学科分类号：
100212 ;
摘要：
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 triple 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.
引用
收藏
页码：164 / 170
页数：7
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