Toric IOL for Cataract Astigmatism Eye Surgery

Objective To evaluate the effectiveness and rotational stability of Toric IOL to correct preexisting corneal astigmatism in cataract patients.Methods This Study included 37 eyes of 32 patients who underwent phacoemulsification and foldable Acrysoftoric IOL implantation from July 2008 to December 2009.As a comparison,30 eyes of 26 patients meeting the same preoperative criteria for degree of corneal cylinder were enrolled to have a Spherical (nontoric) IOL implanted.The uncorrected visual acuity (UCVA),best corrected visual acuity (BCVA),preoperative corneal astigmatism,anticipated residual astigmatism,postoperative residual astigmatism and Toric IOL axis for both study and control groups were analyzed respectively.Results In the study group,94.53％ of eyes were 0.5 or better in UCVA in 3 months after the surgery,81.07％ of eyes were 0.8 or better in UCVA and 96.92％ of eyes were 0.8 or better in BCVA.In the study group,the mean preoperative corneal astigmatism was ( 1.82 ± 0.87 ) D and the postoperative refractive cylinder was (0.63 ± 0.30) D.As a comparison,the mean postoperative refractive cylinder of the control group was (1.14 ± 0.36) D.The difference between these two groups provides a sample base for statistics analysis.The mean deviation between the actual axis and anticipated axis of study group was (3.95±3.69) degrees 1 day after operation,and (2.52 ± 1.95 ) degrees 3 months after operation.94.60％ ＜ 5degree.Conclusion Toric IOL provides cataract patients better UCVA,good rotational stability and reduce the residual astigmatism.Toric IOL implantation is an effective,safe and predictable method to correct the preexisting corneal astigmatism in cataract surgery. Key words: Cataract;  Astigmatism;  Lens, intraocular, toric