Résumé
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) (P0.05).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 .