Symmetrical femtosecond laser arc incision in correcting corneal astigmatism in cataract patients  

作　　者：Zun-Xia Hu Jing Sima Jia-Guo Cao Yan Ke Ying-Ying Zhang Qiong-Tian Guo Yu-Ping He Hong-Xia Liao Xiao Tan Bo Qin Li Li 

机构地区：[1]Femtosecond laser-assisted astigmatic keratotomy 1Aier Eye Hospital,Jinan University,Shenzhen 518032,Guangdong Province,China [2]Nanning Aier Eye Hospital,Nanning 530012,Guangxi Zhuang Autonomous Region,China

出　　处：《International Journal of Ophthalmology(English edition)》2023年第12期1996-2003,共8页国际眼科杂志（英文版）

基　　金：Supported by the Natural Science Foundation of Guangdong Province,China(No.2022A1515010742);Hunan Provincial Natural Science Foundation of China(No.2021JJ30045);the Science Research Grant of Aier Eye Hospital Group(No.AF2102D5,No.AF2201D06,No.AF2201D05).

摘　　要：AIM:To evaluate the effect of symmetrical arc incision correcting corneal astigmatism in femtosecond laserassisted phacoemulsification(FLACS).METHODS:This study enrolled patients with cataract combined with regular corneal astigmatism of>0.75 D,who underwent FLACS.Symmetrical arc incision was set at 8 mm diameter and 85%depth.The follow-up time was 3-24mo(4.92±3.49mo).Pentacam recorded the corneal astigmatism and higher-order aberration at pre-operation and post-operation.The changes in corneal astigmatism were analyzed by Alpins method.The correlation of astigmatism type,age,corneal horizontal diameter,corneal thickness,arc incision length,and correction index(CI)was analyzed,and the residual corneal astigmatism was compared with the residual whole eye astigmatism.RESULTS:Totally 79 patients(102 eyes)were enrolled,10 patients had corneal epithelial injury,1 patient occurred corneal epithelial hyperplasia.The corneal astigmatism was 1.23±0.38 D pre-operation,and decreased to 0.76±0.39 D post-operation(t=10.146,P=0.000).Corneal high-order aberration was 0.17±0.08μm pre-operation and 0.24±0.11μm post-operation(t=-5.186,P=0.000).The residual corneal astigmatism and residual whole eye astigmatism were no significant difference(t=-0.347,P=0.729).Using Alpin’s method,the following were determined:target-induced astigmatism(TIA)=1.23±0.38 D,surgeryinduced astigmatism(SIA)=0.77±0.45 D,difference vector(DV)=0.77±0.39 D,and CI=0.54±0.28.Age,astigmatism size,corneal horizontal diameter,corneal thickness,and arc incision length were not correlated with CI.The CI for against the rule astigmatism(ATR)was better than that for with the rule astigmatism(WTR;P=0.001).CONCLUSION:Femtosecond laser-assisted astigmatic keratotomy has better CI of ATR,but increase higher-order corneal aberration.CI is not ideal,it’s not a perfect choice if we pursue ideal correction effect.

关 键 词：femtosecond laser arc incision keratotomy ASTIGMATISM CATARACT higher-order aberrations 

分 类 号：R779.66[医药卫生—眼科]