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目的探讨高度近视准分子激光原位角膜磨镶术(LASIK)及准分子激光上皮瓣下角膜磨镶术(LASEK)术后角膜后表面高度的差异及意义。方法随机选取高度近视准分子激光患者32人59眼,其中LASIK术31眼17人、LASEK术28眼15人,近视等效球镜度数均>-6.0D。术前、术后1d、术后2w、术后1m、术后3m、术后6m应用OrbscanⅡ行角膜地形图检查。分析比较LASIK及LASEK两组间各个不同时间点的角膜后表面高度。结果LASIK组与LASEK组角膜后表面顶点高度术后与术前比较,差异均有显著统计学意义(P均<0.05)。LASIK组角膜后表面前隆高度术后1m、术后3m、术后6m较术后1d、术后2w好转,差异有显著统计学意义(P均<0.05)。LASIK与LASEK两组间角膜后表面前隆高度比较:术后2w时LASIK组较LASEK组角膜后表面前隆高度更大,差异有显著统计学意义(P均<0.05),术后1m起两组间差异无统计学意义(P>0.05)。结论高度近视LASIK及LASEK术后角膜后表面均有前隆,早期以LASIK术更为明显。
Objective To investigate the difference and significance of posterior corneal height after laser in situ keratomileusis (LASIK) and excimer laser epithelial keratomileusis (LASEK). Methods Totally 59 patients (32 eyes) with high myopia excimer laser were randomly selected. Among them, 31 were treated by LASIK, 17 were treated by LASEK, 15 were treated by LASEK and 28 were treated by LASEK. The mean myopic spherical powers were all> -6.0D. Preoperative, postoperative 1d, postoperative 2w, postoperative 1m, postoperative 3m, 6m postoperative Orbscan Ⅱ corneal topography. Analysis and comparison of LASIK and LASEK between the two groups at different time points after the corneal surface height. Results There was a significant difference in the height of apex between the LASIK and LASEK groups (P <0.05). The anterior height of posterior corneal surface in LASIK group was significantly different at 1m postoperatively, 3m postoperatively, 6m postoperatively, 1 day postoperatively, and 2w postoperatively. The difference was statistically significant (all P <0.05). The LASIK and LASEK corneal posterior surface anterior height comparison: LASIK group than LASEK group corneal posterior surface anterior height more significantly, the difference was statistically significant (P <0.05), 1m from the two There was no significant difference between groups (P> 0.05). Conclusions There are anterior corneal posterior corneal surface in LASIK and LASEK patients with high myopia. The early LASIK surgery is more obvious.