Clinical studies on AcrySof(R) Toric intraocular lens

Objective To evaluate the safety and efficacy of AcrySof(R) Toric intraocular lens implantation to correct preexisting corneal astigmatism in cataract surgery. Methods Thirty-six cataract patients (42 eyes) with corneal astigmatism greater than 0.75D were involved in this study and randomized divided into two groups. Group A with 15 patients (18 eyes) received AcrySof(R) Toric IOL implantation and group B with 21 patients (24 eyes) received AcrySof(R) Natural IOL after phacoemulsification. Uncorrected distant visual acuity (UCDVA), best corrected distant visual acuity (BCDVA), corneal astigmatism, residual astigmatism, Toric IOL rotational stability, spectacles independence, patient satisfaction and operative complications were observed. Results Patients with UCDVA 0.8 or better accounted for 66.7% (12/18), 72.2% (13/18), 72.2% (13/18) in group A and 33.3% (8/24), 37.5% (9/24), 37.5% (9/24) in group B, respectively. There were significant differences between the two groups 1 week, 1 month and 3 months after operation (P 0.05). There were no significant differences in preoperative corneal astigmatism and corneal astigmatism 3 months after operation in the two groups respectively (P >0.05). There were significant differences in the mean residual astigmatisms between the two groups 1 week, 1 month and 3 months postoperatively (P <0.05). The mean Toric IOL axis rotation was less than 5 degrees 3 months postoperatively. Spectacles were not necessary in 72.2% (13/18) and 37.5% (9/24) cases in group A and B, respectively. No eye had intraoperative or postoperative complications. Conclusions The results indicate that AcrySof(R) Toric IOL implantation is an effective option to correct preexisting corneal astigmatism in cataract surgery. The Toric IOL shows good rotational stability. Key words: Corneal astigmatism;  Intraocular lens;  Cataract