The Short-term Efficacy on Astigmatism Reduction According to Lenght and Site of Linear Clear Corneal Incision in Cataract Surgery

Kim, Chul Woo; Kim, Ki Seok; Hahn, Tae Won

Abstract

This study was performed to evaluate the efficacy on astigmatism reduction according to lenght and site of clear corneal linear incision. 118 patients(122eyes)underwent cataract operation with clear corneal linear incison. The eyes were classified into 4 groups according to incision direction and size:group 1; 3.2 mmsized superior incision, silicon IOL was inserted. group 2;3.2 mm sized temporal incision, silicon IOL was inserted.group 3;4.0mm~4.5mm sized superior incision, Acrysof IOL was inserted. group 4;4.0mm~4.5 mmsized temporal incision, Acrysof IOL was inserted. All patients had visual acuity measurement and astigmatism evaluation with autorefractometry and corneal topography at preoperation and 1 week, 1 month, 2 month after operation. In Corneal Topography, the difference of astigmatism between preoperation and postoperation was statistically significant at 2 month after operation in group 4 only. In Autorefractometry the difference of astigmatism between preoperation and postoperation was statistically significant at 2 month after operation in all groups. In Cravy vector method, the difference of astigmatism between preoperation and postoperation was statistically insignificant at 2 month after operation in all groups. The differences of astigmatism was statistically insignificant among groups in above all methods. In Conclusion, Linear clear corneal incison at steep axis is effective to reduce astigmatism.