Toric Intraocular Lens vs. Peripheral Corneal Relaxing Incisions to Correct Astigmatism in Eyes Undergoing Cataract Surgery

Purpose:.To compare toric intraocular lens implantation(ToricIOL).with peripheral corneal relaxing incisions(PCRIs) for astigmatism correction in patients undergoing cataract surgery.Methods: 54 patients(54 eyes) with more than 0.75 diopter(D).of preexisting corneal astigmatism were classified as group A(0.75-1.50D) or group B(1.75-2.50D). The patients were randomized to undergo Toric-IOL or PCRIs in the steep axis with spherical IOL implantation..Log MAR uncorrected visual acuity(Log MAR UCVA), Log MAR best corrected vi sual acuity.(Log MAR BCVA),.error of vector(|EV|), surgery induced refraction correction.(|SIRC |),.and correction rates(CR) were measured 1 month and 6 months postoperatively.Results: At 6 months postoperatively, all 54 eyes had LogMAR BCVA≤0.2. Patients who underwent PCRIs and ToricIOL with Log MAR BCVA≤0.1 showed no significant differences in group A(P=1.00) or in group B(P=0.59). Group A showed no significant differences in Log MAR UCVA(P =0.70), |EV|(P=0.13), |SIRC|(P=0.71), and CR(P=0.56)in patients underwent PCRIs and Toric-IOL. However, group B showed significant differences in Log MAR UCVA(P <0.01), |EV|(P<0.01)), |SIRC|(P<0.01), and CR(P<0.01).The Log MAR UCVA and |EV | between 1 and 6 months showed no significant differences in patients in group A. However, in group B, they are significant differences.Conclusion:.The efficacy and stability of Toric-IOL and PCRIs were equal in low astigmatic patients..Toric-IOL achieved an enhanced effect over PCRIs in higher astigmatic patients.PCRIs had the more refractive regression than Toric-IOL in 6months.