The study ofToric intraocular lens for corneal astigmatism correction in cataract patients

Objective To evaluate the safety, efficacy, stability of AcrySof Toric IOL implantation to correct corneal astigmatism in patients having cataract surgery. Methods This prospective study included 46 eyes of 39 consecutive cataract patients with more than 0.75 diopter （D） of preexisting corneal astigmatism during a period of 12 months. ARer PEA, 46 eyes were implanted with AcrySof Toric IOL, 1 day, 1 week, 1 month, 3 months after IOL implantation, the uncorrected visual acuity （UCVA）, residual refractive sphere and cylinders, corneal keratometric, the toric IOL axis were measured. Results 1. UCVA： before operation, 21 out of 46 eyes （45.65%） presented 〈0.1, 24 （52.17%） 0.1-0.3, 1 （2.18%） 0.4-0.6; 3 months after implantation, 4 out of 46 eyes （8.70%） presented 0.1-0.3, 27 （58.70%） 0.4-0.6, 6 （13.04%） 0.7-0.9, 9 （19.56%） 1.0 or better.There was statistically significant differences between before and after operation （P〈0.05）. 2. Residual refractive cylinders： 65.22% eyes had 0-0.75D, 34.78% 1.0-1.75D. 3. Corneal astigmatism： before operation, the corneal astigmatism was 1.84± 0.53D, after operation, was 1.73± 0.59D. There was no statistically significant differences between before and after operation （P〉0.05）. The mean SIA was 0.67± 0.53D. 4. Rotational stability： 3 months after implantation, all ActySofToric IOL rotated less than 20 degrees, IOL of 21 eyes （45.66%）less than 5 degrees, 11 eyes （23.91%）rotated 6° -10° , 13 eyes （28.26%） 11° -15° , 1 eye （2.17%） 16°-20° . The mean AcrySof Toric IOL axis rotation was 7.23±5.04 degrees （0-17degrees）. Conclusions The results show that phacoemulsification and AcrySof Toric IOL implantation is a safe and effective option to correct preexisting astigmatism in cataract surgery. Key words: Cataract;  Astigmatism;  Intraocular lens