光折变性角膜切除术
烧蚀
准分子激光器
角膜
激光矫视
光学
光折变效应
医学
材料科学
准分子
激光器
梁(结构)
烧蚀区
激光烧蚀
激光束质量
激光束
光电子学
物理
内科学
作者
Charles R. Munnerlyn,Stephen J. Koons,John Marshall
出处
期刊:Journal of Cataract and Refractive Surgery
[Ovid Technologies (Wolters Kluwer)]
日期:1988-01-01
卷期号:14 (1): 46-52
被引量:735
标识
DOI:10.1016/s0886-3350(88)80063-4
摘要
The excimer laser offers entirely new corneal surgery procedures. In this paper, we describe conditions for one such procedure, photorefractive keratectomy, the direct reshaping of the cornea's central optical zone using tissue ablation with far ultraviolet radiation. We present equations for the required tissue ablation to achieve required refractive corrections. Conditions for beam uniformity are presented and a method of achieving better beam uniformity using beam integration by rotation is demonstrated. The healing of rabbit corneas after area ablation was observed. Five days after treatment, the surface quality of deep cuts was very irregular; the shallow cuts produced more regular results, as predicted by our calculations of beam characteristics.
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