Evaluation of long-term visual performance following AcrySof ReSTOR lens implantation

Abstract

Background: Multifocal lens has become popular in cataract surgery. Short-term outcome after AcrySof ReSTOR Lens implantation had been reported by many studies, but long-term visual performance and the effect of posterior capsular opacification (PCO) on visual performance need further investigation.

Methods: This retrospective study involved 54 eyes from 41 cataract patients implanted with ReSTOR lens, with a follow-up period of 12 to 31 months. Manifest refraction spherical equivalence (MRSE), monocular uncorrected and best-corrected distance visual acuity, uncorrected and distance-corrected near and intermediate visual acuity, contrast sensitivity were assessed. The effect of PCO on visual performance was evaluated by comparing visual parameters between pre and post-capsulotomy.

Results: Uncorrected distance visual acuity of eyes with MRSE within +/-0.5 diopter (D) was better than those with MRSE greater than +/-0.5 D (P < 0.05). Uncorrected distance and near visual acuity (LogMAR) was 0.10 and 0.17 respectively. Best corrected distance visual acuity and best distance-corrected near visual acuity (LogMAR) was 0.00 and 0.16, a significant improvement was noted after correction (P = 0.000, P = 0.001, respectively). Contrast sensitivity logarithm was comparable with the normal value at difference spatial frequencies except at 12 cpd. In 5 eyes with mild PCO, post-capsulotomy visual parameters were better than pre-capsulotomy (P < 0.05).

Conclusion: ReSTOR lens provides a good long-term distance and near vision, functional intermediate vision and contrast sensitivity. Mild PCO significantly affects visual performance and needs early intervention.