Clinical analysis of refractive regression after LASIK in moderate and high myopic eyes

Abstract

AIM:To analyse of refractive regression after laser in situ keratomileusis(LASIK)in moderate and high myopic eyes.METHODS:A retrospective study. Thirty patients(60 eyes)with refractive regression after LASIK in our hospital from January 2016 to January 2018 were selected for statistical analysis. According to preoperative refraction, they were divided into three groups: moderate myopia group(-10.00D). The visual acuity, diopter, corneal curvature, CCT, intraocular pressure, ocular axis and residual corneal matrix thickness were analyzed before and after surgery.RESULTS:The refractive regression rate was 8.6%(60/700 eyes). At 6mo after operation, the refractive regression of the patients were as follows: moderate myopia group, 1.31±0.15D, high myopia group, 1.76±0.23D, ultra-high myopia group: 2.53±0.35D(PPPP>0.05), but there was difference between the two groups(PPP>0.05).CONCLUSION: The occurrence of refractive regression after LASIK is related to preoperative refraction. High myopia and ultra-high myopia may have refractive regression due to progressive growth of eye axis, while moderate myopia may have refractive regression due to increased corneal thickness and corneal curvature changes caused by post-operative matrix repair.

Keywords

• excimer laser <i>in situ</i> keratomileusis
• regression
• clinical analysis