低中度近视EPI-LASIK术后视觉质量探讨

Visual quality after epipolis laser in situ keratomileusis surgery in mild and moderate myopia

目的:综合评价低中度近视机械法激光上皮下角膜磨镶术(EPI-LASIK)后视觉质量。方法:将行EPI-LASIK术的60例120眼按等效屈光度(SE)分为两组:低度近视组(60眼),中度近视组(60眼)。测量术前和术后1wk;1,6mo的客观视力、像差、对比敏感度和眩光敏感度并进行比较。结果:术后两组裸眼视力(UCVA)均优于术前最佳矫正视力(UCVA)(P<0.05);两组术后6mo总高阶像差值RMS比较有统计学差异(P<0.05)。两组术前及术后6mo高阶像差值比较均有统计学差异(P<0.05);术后1wk;1mo两组在五个频率上均有统计学差异(P<0.05);术后6mo低度近视组恢复至术前水平,中度近视组在高频区(18.0c/d)和术前有统计学差异(P<0.05);术后1wk两组在3.0,6.0,12.0,18.0c/d频率上差异均有统计学差异(均P<0.05),术后1mo两组在12.0,18.0c/d频率上有统计学差异(均P<0.05),术后6mo两组均恢复至术前水平,比较均无明显差异。结论:低中度近视EPI-LASEK术后早期的视觉质量较差,中晚期有较好的视觉质量。

AIM ： To comprehensively evaluate of visual quality after epipolis laser in situ keratom ileusis（ EPI-LASIK） in mild to moderate m yopia.METHODS： Sixty cases（ 120 eyes） undergone EPI-LASIK with equivalent diopter（ SE） were divided into two groups： mild myopia group（ 60 eyes） and moderate myopia group（ 60 eyes）. Objective visual acuity,aberration,contrast sensitivity and glare sensitivity were measured before and 1wk; 1,6m o after operation,and made comparative analysis.RESULTS： Postoperative uncorrected visual acuity（ UCVA） of two groups were better than that of preoperative（ P〈0. 05）. Postoperative 6mo,there were significant differences on total high RM S between to groups（ P〈0. 05）. Before operation and 6mo after operation, higher- order aberrations had statistically significant difference between two groups（ P〈0. 05）.After 1wk and 1mo,there were statistical significances at the five frequencies between two groups（ P〈0. 05）. After6 m o,the mild m yopia group returned to preoperative levels,however, moderate myopia group in the high frequency region（ 18. 0c / d） had significant differencew ith before surgery（ P〈0. 05）. 1wk after surgery,there were statistically significant differences on the 3. 0,6. 0,12. 0,18. 0c / d frequency in both groups（ all P〈0. 05）,1mo after surgery,there were significant difference at12. 0,18. 0c / d frequencies（ all P〈0. 05）,after 6m o,both groups returned to preoperative levels, show ed no significant difference.CONCLUSION： Visual quality is poorer in mild myopia patients than that in m oderate m yopia at early stage after EPI-LASIK. Better visual quality is observed at mid-late stage.