PRK治疗近视术后远期疗效分析

Analysis of long-term results of photorefractive keratectomy for myopia

目的:评价PRK治疗近视及散光的远期疗效。方法:选取1996-11/1998-01PRK手术116例(219眼),按术前等值球镜度分为3组,A组:-1.00D^-3.00D53眼;B组:-3.125D^-6.00D125眼;C组:-6.125D^-16.00D41眼。术后随访10a。结果:术后10a裸眼视力≥0.5、≥1.0者,A组分别为100%、84.9%;B组分别为100%、80.8%;C组分别为92.7%、31.7%。术后10a屈光度在预定矫正度±1.00D以内者,A、B、C组依次为92.5%,74.4%,34.2%。术后10a最佳矫正视力达到或超过术前最佳矫正视力者依次98.1%、98.4%、92.2%。无1例有1级以上角膜上皮下雾状浑浊(Haze)者。结论:PRK是治疗近视安全有效的方法,其预测性及稳定性与近视度呈负相关。

AIM： To evaluate the long-term results of excimer laser photorefractive keratectomy （PRK） for myopia. METHODS： Totally 116 patients （219 eyes） with myopia treated by the PRK, during November 1996 to January, 1998, were divided into 3 groups according to the mean preoperative spherical equivalent refraction： -1.00D - -3.00D, of 53 eyes were in group A; - 3.125D -- 6.00D of 125 eyes in group B; -6.125D --16.00D of 41 eyes in group C. The follow-up period was ten years and the results were concluded and analyzed. RESULTS： After ten years, the rate of uncorrected visual acuity ≥0. 5 and ≥1.0 in group A, B and C were 100%, 84.9%; 100%, 80. 8% and 92.7%, 31.7%. Respectively, 92. 5%, 74. 4% and 34. 2% in above three groups＇ diopter were within 1. 00D. The rate of best corrected visual acuity that had improved or had not improved were respectively 98.1%, 98.4% and 92.2%. No corneal Haze at first class was found. CONCLUSION： PRK is an effective and safe method for correcting the myopia, the correlation among spherical equivalent refraction, the predictability and the stability are negative.