Kappa角调整近视性LASIK手术对术后高阶像差的影响

目的 探讨Kappa角调整的准分子激光原位角膜磨镶术(laser in situ keratomile-usis,LASIK)是否有利于减少术后高阶像差,提高视觉质量.方法 选取近视及近视散光患者40例80眼,设立Kappa角调整与传统LASIK治疗近视的自身对照,比较手术后球差和彗差的变化量.结果 测量术前和术后1个月的高阶像差,Kappa角调整组在术前和术后,球差变化量分别为(0.553±0.193)×10-3mm、(1.603±0.619)×10-3mm,彗差变化量分别为(0.428±0.278)×10-3mm、(0.521±0.766)×10-3mm;传统模式的LASIK组球差变化量术前、术后1个月分别为(0.570±0.201)×10-3mm、(1.543±0.609)×10-3mm,彗差变化量术前、术后1个月分别为(0.711±1.412)×10-3mm、(0.334±1.495)×10-3mm;2组经配对t检验,结果显示术前、术后高阶像差变化量差异无显著统计学意义(P均>0.05).结论 目前采用的Kappa角调整的LASIK较传统LASIK没能有效减少高阶像差的形成,术后效果无明显差异性.

Kappa angle adjustment on higher order aberration after LASIK in myopic eyes

Objective To investigate Kappa angle adjustment with the effects to lessen higher order aberration and improve visual quality or not after laser in situ keratomileusis(LASIK), Methods Forty cases(80 eyes) with myopia and myopic astigmatism were selected. Own control was established in Kappa angle adjustment group and traditional LASIK group for myopia. Postoperative spherical aberration and comatic aberration were compared, Results Higher order aberration was detected preoperatively and at 1 month postoperatively. The variations of spherical aberration and comatic aberration between pre- and post-operation were(1.603±0.619) × 10-3 mm, (0.521±0. 766)× 10-3mm ill Kappa angle adjustment group,and(1.543±0. 609)× 10-3mm, (0.334±1. 495)× 10-3mm in traditional LASIK group, respectively. There was no significant difference between two groups after paired t test (P > 0.05). Conclusions Comparing with traditional LASIK, Kappa angle adjustment cannot effectively lessen the formation of higher order aberration, and no significant difference is found postoperatively.