白内障超声乳化术中行陡峭子午线透明角膜切口对角膜散光的影响

摘要

目的 评估白内障超声乳化术中行陡峭子午线透明角膜切口对角膜前表面散光及角膜总散光的影响.方法回顾性分析2015年8~12月56例单纯白内障超声乳化术中行陡峭子午线的透明角膜切口的临床资料,分别在术前、术后1个月和3个月使用Pentacam眼前节分析系统进行检查,记录测量的角膜前表面散光和角膜总散光,并采用极坐标系评估在陡峭子午线方向行透明角膜切口对手术眼角膜散光的影响.结果所有患者手术及恢复顺利.与术前比较,术后1个月和3个月角膜前表面散光和角膜总散光AKP(+0)都有明显减少(P<0.05),AKP(+45)无统计学意义(P>0.05).术后1个月与3个月相比角膜总散光和角膜前表面散光在AKP(+0)或AKP(+45)均无统计学差异(P>0.05).结论在术前角膜前表面散光的陡峭轴上行透明角膜切口可减少白内障手术后角膜总散光.%Objective To evaluate effects of steep meridian clear corneal incisions on corneal anterior surface and total astigmatism in phacoemulsification surgery . Methods Clinical data of 56 cases of phacoemulsification surgery with steep meridian clear corneal incisions from August to December 2015 were analyzed in this retrospective study .Corneal anterior surface and total astigmatism were measured with the Pentacam 3D anterior segment measurement and analysis system at the time before surgery and 1 month and 3 months after surgery .The polar coordinate analysis was used to evaluate effects of steep meridian incisions on corneal astigmatism . Results All the operations were accomplished successfully with smooth recovery .The corneal anterior surface and total astigmatism reduced significantly after 1 month and 3 months in astigmatic polar value AKP ( +0) (P<0.05), but no significant difference was found in AKP(+45) (P>0.05).No significant differences were detected between both corneal anterior surface and total astigmatism in AKP(+0) or AKP(+45) between 1 month and 3 months after surgery. Conclusion Steep meridian incision performed on the preoperative steeper meridian of keratometric astigmatism may reduce corneal total astigmatism .