准分子激光屈光性角膜切削术治疗近视和近视散光3年疗效分析

Analysis on three-year follow-up results of excimer laser photorefractive keratectomy in treatment for myopia and myopic astigmatism

目的 :评价准分子激光角膜切削术 (photorefoactivekeratecomy ,PRK)治疗近视、近视散光的远期疗效。方法 :按术前屈光度将 2 0 9例 (3 77例 )屈光度为 - 1 5 0～ 1 6 0D的患者分为二组 ,低中度组 (I组 )为 - 1 5 0～ - 6 0 0D(2 3 8眼 ) ,高度组 (II组 )为 - 6 2 5～ - 1 6 0 0D(1 3 9眼 )。应用美国Visx2 0 /2 0准分子激光仪对上述二组患者行PRK治疗 ,并对患者术后 3年的屈光度、视力、角膜屈光力、角膜厚度、并发症进行随访观察。结果 :I组、II组中屈光度 <± 1D者分别占 94 5 %和 6 1 9% ;≥± 2 0 0D分别占 0 % ,2 3 7%。术后裸眼视力≥ 0 5者在I组、II组中分别占 99 6 %和 79 9% ;≥ 1 0者分别占 85 3 % ,48 2 %。角膜屈光力两组均在术后 6个月稳定 ,角膜上皮下雾状混浊O级在I组、II组分别为1 0 0 %和 98 6 % ,术后眼压两组均正常。结论 :准分子激光屈光性角膜切削术治疗近视、近视散光效果肯定 。

Objective To evaluate the efficacy of excimer laser photorefractive keratectomy(PRK) on myopia and myopia astigmatism. Methods PRK was performed with VISXC20/20 on 377 eyes of 209 patients. Treated eyes were divided into two groups, according to their conditions before operation: Group I included 238 eyes (-1.50 to -6.00 D); Group II, 139 eyes (-6.25 to -16.00 D). All patients were followed-up for more than three years. Results Percentages of uncorrected visual acuity (UCVA) ≥10/20 and 20/20 were 99 6% and 85 3% in Group I, and 79.9% and 48.2% in Group II respectively. Percentage of diopter <±1.00 in Group I was 94.5%, and 61.9% in Group II. The rate of corneal haze of grade 0 was 100% in Group I, and 98.6% in Group II, but corneal haze of grade 2 was found in 1.2% of eyes in Group II. The postoperative intraocular pressure (IOP) of all operated eyes was normal. Concusion The results suggest that excimer laser PRK is an effective method for treating myopia and myopic astigmatism, especially for low and moderate myopia.