EFFECT OF CORNEAL EDEMA UPON THE SMOOTHNESS OF EXCIMER-LASER ABLATION

被引：13

作者：

FIELDS, CR ^{[1
]}

TAYLOR, SM ^{[1
]}

BARKER, FM ^{[1
]}

机构：

[1] PENN COLL OPTOMETRY,HAFTER FAMILY LIGHT & LASER INST,1200 W GODFREY AVE,PHILADELPHIA,PA 19141

来源：

OPTOMETRY AND VISION SCIENCE | 1994年 / 71卷 / 02期

关键词：

EXCIMER; EDEMA; TOPOGRAPHY; ABLATION; MYOPIA;

D O I：

10.1097/00006324-199402000-00010

中图分类号：

R77 [眼科学];

学科分类号：

100212 ;

摘要：

We studied the effect of corneal hydration upon ablation rate in excimer laser photorefractive keratectomy (PRK). This variable may alter the subepithelial smoothness and the resulting clarity of the result. The eyes of freshly slaughtered pigs (N = 5) and the eyes of Dutch-belted rabbits (N = 4) (in vivo) were de-epithelialized and central ablation zones 3.0 to 4.5 mm in diameter were produced in the subepithelial corneal layers using a 193 nm argon fluoride (ArF) ophthalmic excimer laser. Ablation was performed immediately or after a 15-min incubation period in distilled water as a means of inducing corneal edema. Smoothness was evaluated using specular reflection microscopy and showed the water-treated surface to be increasingly less regular than the nonwater-treated samples. Water treatment may affect the final outcome of the PRK procedure and indicates the need to monitor the preoperative cornea for the development of any edema, especially after the epithelium is removed.

引用

页码：109 / 114

页数：6

共 17 条

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