西藏高原地区LASIK治疗近视过矫的临床分析

Clinical analysis of LASIK treatment resulted in overcorrection in Tibetan Plateau

目的:探讨西藏高原地区影响准分子激光原位角膜磨镶术(laser in situ keratomileusts,LASIK)治疗近视过矫的因素及解决办法。方法:对126例252眼近视患者中LASIK术后明显过矫的32例58眼术前、术后的相关资料进行分析。结果:术后2mo过矫者32例58眼(23.0%),裸眼视力0.5~0.8,过矫范围+1.50^+2.25DS,主观插片均≥1.0;术后6mo过矫者5例7眼(2.8%),裸眼视力0.8~1.0-2,过矫范围+0.75^+1.25DS,主观插片均≥1.0。其中过矫的患者术前角膜厚度500~563μm,术前屈光度数为-5.00^-7.50D,散光-1.50^-2.75DC,术前最佳矫正视力≥1.0。结论:我院LASIK手术治疗近视过矫患者较多,恢复时间较长,可能与当地海拔、温度、湿度、手术参数及患者的配合情况等因素有关。

AlM：To investigate the factors and solutions of Tibetan Plateau excimer laser in situ keratomileusis （ LASlK ） for myopia overcorrection.METHODS： The relevant information, 32 cases （ 58 eyes） in 126 cases （252 eyes） had obvious overcorrection after LASlK were analyzed.RESULTS： Two months after surgery, 32 cases （ 58 eyes） overcorrection （23. 0%）, uncorrected visual acuity of 0. 5 ~0. 8, overcorrection range of ＋1. 50 ~ ＋2. 25DS, subjective inserts were ≥ 1. 0; Five case （ 7 eyes ） overcorrection 6mo after surgery （2. 8%）, uncorrected visual acuity 0. 8~1. 0-2 , overcorrection range is ＋0. 75 ~＋1. 25DS, subjective inserts were≥1. 0. Corneal thickness of overcorrection was 500~563μm, preoperative refraction was -5. 00 ~ -7. 50D, astigmatism -1. 50 ~ -2. 75DC, preoperative best corrected visual acuity ≥1. 0.CONCLUSlON： Overcorrection and long recovery time after LASlK in Tibet, possibly with local factors altitude, temperature, humidity, surgical parameters and situation.