Effect Of Incision On Visual Outcomes After Implantation Of A Trifocal Diffractive IoL

Background:To evaluate visual acuity,corneal astigmatism,corneal higher-order aberrations?HOAs?and patients'satisfaction after implantation of trifocal diffractive IOLs operated with either corneal steep-axis incision or 135°incision.Method:This prospective study enrolled patients randomly assigned to different groups.According to preoperative corneal astigmatism,101 eyes of 77 patients were assigned into group A₁?0⁰.50 D,22 eyes?,A₂?0.51¹.00 D,27 eyes?with corneal steep-axis incision and group B₁?0⁰.50 D,23 eyes?,B₂?0.51¹.00 D,29 eyes?with 135°incision.Visual acuity,corneal astigmatism and corneal higher-order aberrations?HOAs?were followed-up for 3 months.Patients'satisfaction was obtained by a relevant questionnaire.Results:Corneal astigmatism of group A₂ decreased significantly at 3 months after the surgery?P<0.01?,and was significantly lower than group B₂ at 1 day,2 weeks,1 month,3 months postoperatively?all values of P<0.01?.Uncorrected intermediate visual acuity?UIVA?at 1 day,2 weeks,1 month,3 months,uncorrected distance visual acuity?UDVA?at 1 day,2 weeksand uncorrected near visual acuity?UNVA?at 1 day,2 weeks,1 month postoperativelyof group A₂ were better than group B₂?all values of P<0.05?.All patients both in group A and group B were satisfied with the visual outcomes after implantation of trifocal IOLs.They can perform their daily routine activities with existing but non-disturbing photic phenomena.Conclusions:After making corneal steep-axis incision,patients with preoperative corneal astigmatism of 0.51 D to 1.00 D can get reduced corneal astigmatism and obtain better UIVA and better early postoperative UDVA/UNVA.