A comparison of intermediate and near visual outcomes and reading ability in patients bilaterally implanted with bifocal ZM900, ReSTOR IOLs and with multifocal ReZoom IOLs

Abstract

Abstract Purpose To compare intermediate and near distance visual outcome, reading performance, level of satisfaction and quality of vision at intermediate and near distance in patients bilaterally implanted with diffractive (AMO Tecnis ZM900 or Alcon ReSTOR) and refractive (AMO ReZoom) multifocal IOLs (MIOL). Methods This study enrolled 71 cataract patients, 26 of whom received ZM900 diffractive IOL bilaterally (Group A), 22 of whom received ReSTOR diffractive IOL bilaterally (Group B) and 23 of whom received ReZoom refractive IOL bilaterally (Group C). Best distance‐corrected intermediate and near visual acuity (BCDIVA ‐ BCDNVA), defocus curve, binocular vision, reading speed, contrast sensitivity and Visual Function‐7 (VF‐7) modified questionnaire scores for intermediate and near distance everyday activities were assessed a month after surgery. Inclusion criteria were: age range 50‐80 years, no concomitant ocular diseases and no intraoperative complicances. Results BCDIVA and BCDNVA were better in group A and B than in group C. Group A achieved better contrast sensitivity than group B and C. Reading speed and VF‐7 questionnaire scores were comparable in all groups. Conclusion Intermediate and near distance performances were acceptable in all groups but diffractive IOLs proved slight1y better than refractive IOLs at near distance. Particularly, diffractive ZM900 IOL obtained better resu1ts than the other lenses. In our opinion the modified prolate aspherical surface of this lens could explain this phenomenon.