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回顾分析经PRK治疗的102例病人173只眼术后2年的屈光改变,根据术前屈光度将病人分为低度、中度和高度近视眼组。术后最短随访时间为2年,用Holladay,Cravy,Koch矢量分析法评价术后1、3、6个月和1、2年屈光改变。结果:3组173只眼中有159只眼(91.9％)接受1次PRK治疗,2只眼(1.2％)接受2次治疗,10只眼(5.8％)接受3次治疗,2只眼(1.2％)接受4次治疗。术后16只眼矫正视力下降,余裸眼视力均提高。术后2年平均等值球镜屈光度为-0.52D(P<0.05),其中低度近视眼组为0.02D,中度近视眼组为-0.28D,高度近视眼组为-1.20D。并发症:矫正视力下降(16只眼)、过度矫正(12只眼)、角膜上皮下雾状混浊(6只眼)、切削偏中心(1只眼),和角膜上皮病变(1只眼)等。结论:PRK是矫正近视眼的有效而安全的方法,但对高度近视眼仍存在术后屈光回退问题。
Retrospective analysis of PRK-treated 102 patients with 173 eyes 2 years after refractive change, according to preoperative refraction of patients were divided into low, moderate and high myopia groups. The shortest follow-up time was 2 years. The postoperative 1, 3, 6 months and 1, 2 years of refractive change were evaluated by Holladay, Cravy and Koch vector analysis. RESULTS: Of 159 eyes (91.9%) in 173 eyes in 3 of the 3 groups, 1 PRK was treated, 2 eyes (1.2%) received 2 treatments, 10 eyes (5.8%) received 3 treatments and 2 eyes %) Received 4 treatments. After correction of 16 eyes visual acuity decreased, more than naked eye vision were increased. The mean equivalent spherical power at 2 years after surgery was -0.52D (P <0.05), with low myopia of 0.02D, moderate myopia of -0.28D, and high myopia of -1.20D. Complications: Decreased visual acuity (16 eyes), overcorrection (12 eyes), corneal haze (6 eyes), partial center of cut (1 eye), and corneal epithelial lesions (1 eye) Wait. Conclusion: PRK is an effective and safe method to correct myopia. However, there is still postoperative refractive regression in high myopia.