1993 年 14 巻 Supplement 号 p. 453-456
We perfomed photorefractive keratectomy (PRK) since August 1990, with the use of 193nm excimer laser. The total number of the cases treated was 181 eyes of 105 patients. As the results, the predictability of low and moderate myopia was excel lent. And no significant changes could be seen in either corneal endothelium or epithelium to show that PRK is very safe procedure. But it is necessary to solve the ploblems of corneal haze and centration of irradiation.