准分子激光角膜表面切削术治疗近视

Excimer laser photorefractive keratectomy in myopia

目的 :为了评价准分子激光角膜表面切削术 (PRK)的治疗近视、散光的疗效。方法 :采用美国VISX2 0 -2 0型准分子激光仪对 6 8例 133眼近视患者行PRK治疗。结果 :3～ 6个月 ,残余屈光度为t0 0 8± 0 2 9D ,裸眼视力≥ 0 8者占 94 2 % ,≥ 1 0者占 90 4% ,术前屈光度在 - 1 5 0～ - 6 0 0D者术后 3～ 6个月后裸眼视力≥ 0 8者占 95 2 % ,≥ 1 0者占 94 2 % ,术前屈光度在 - 6 2 5～ - 12 0 0D者术后 3～ 6个月后裸眼视力≥ 0 8者占 91 7% ,≥ 1 0者占 6 5 4%。实际矫正度数在预测屈光度± 0 5 0D范围者占 84 6 % ,0 8%术眼有 2级以上的角膜上皮下雾状混浊 ,无 1例用药后眼压增高者 ,最佳矫正视力下降 1行者占 6 8%。结论 :准分子激光角膜表面切削术对低中高度近视均安全有效 ,对低中度近视效果更佳 ,对高度近视的预测较差。

OBJECTIVE:To evaluate the effect of excimer laser photorefractive keratectomy (PRK) for the treatment of myopia. METHODS: With VISX 20/20 excimer laser PRK was performed on 133 eyes of 68 cases. RESULTS: The mean refraction was t 0 08±0 29D after 3 to 6 months postoperatively. 94 2% uncorrected vision was more than 0 8, 90 4% more than 1 0. In the first groups (myopes below-6 00D), 95 2% uncorrection vision was more than 0 8, 94 2% more than 1 0. For the second group (myopes over -6 00D). 91 7% uncorrected vision was more than 0 8, 65 4% more than 1 0. Haze is main complication in PRK. CONCLUSION: PRK is a safe, effective method for treating myopia, especially for low and moderate myopia.