LASIK手术并发症对眼波阵面像差的影响

The wavefront aberrations of the complications following laser in situ keratomileusis

目的 探讨屈光手术后中央岛、偏中心、不规则散光、多中心切削等并发症对眼波阵面像差的影响。方法 进行一项回顾性的临床研究 ,对接受 L ASIK手术术后发生各种并发症的 2 5例患者 (2 9只眼 )的眼波阵面像差进行了评估。采用主观性波阵面像差仪对眼波阵面像差进行了测量与比较。检查结果通过 Madlab软件分析 ,直接获取 35项 Zemike系数及每阶 Zemike系数的 RMS值。结果 无并发症组患者术前最佳矫正视力 (BCVA)是 1.0 1± 0 .12 ,术后 3月 BCVA为 0 .99± 0 .14 ;并发症组患者术前 BCVA是 1.0 2± 0 .0 9,术后 BCVA为 0 .6 1± 0 .2 4。术前眼波阵面像差的 RMS值为 0 .6 5μm ,术后无并发症组为 1.5 1μm;而中央岛组的 RMS值为 6 .78μm ;偏中心组为 7.94μm;不规则散光组为 9.32μm ;多中心切削组为 7.2 9μm。结论 L ASIK术中术后所致的并发症可导致眼波阵面像差数倍的增加 。

Objectives To study the wavefront aberrations changes of the complications following laser in situ keratomileusis(LASIK)for myopia and myopia astigmatism.Methods A retrospective clinical trial was designed to assess the chances of the wavefront aberration of the complications following LASIK of twenty-nine eyes of twenty-five patients enrolled in this study.The wave front aberrations of complications undergoing LASIK was compared with uncomplications.Coefficients of 35 terms of zemike aberrations were directly obtained from the aberrometer,and RMS of each order of Zemike and RMS of overall wavefront aberrations were analyzed by Madlab.Results On average,BCVA(best corrected vision acuity)was 1.01±0.12 in the uncomplicative group preoperatively,and BCVA was 0.99±0.14 at 3 months postoperatively.BCVA was 1.01±0.09 in the complicative group preoperatively,and BCVA was 0.61±0.24 postoperatively.The preoperative RMS of overall wavefront aberrations was 0.65μm,the postoperative RMS in the uncomplicative group was 1.51μm,the central island group was 6.78μm,the decentered ablative group was 7.94μm,the irregular astigmatism group 9.32μm,the polycentric ablative group was 7.29μm.Conclusions The complications following LASIK may increase markedly the optical wavefront aberrations and affect badly the quality of vision.