Visual acuity from far to near and stereoscopic vision in eyes that underwent bilateral implantation of multifocal or monofocal intraocular lens after phacoemulsification

Abstract

Objective To compare visual acuity from far to near and stereoscopic vision in patients who underwent bilateral implantation of aspheric diffractive multifocal intraocular lens (IOLs)with monofocal IOLs. Methods This prospective study comprised patients having implantation of an aspheric diffractive multifocal ReSTOR SN6AD1 IOL with a C3.0 D add (SN6AD1) or a monofocal IOL (SN60AT). Visual acuity from far to near distances and stereoscopic vision were evaluated 3months postoperatively. Results Multifocal IOL group comprised 36 eyes of 18 patients. Monofocal IOL group comprised 40 eyes of 20 patients. The differences between groups of uncorrected and corrected distance visual acuity and corrected near visual acuity had not statistically significant (P＞0.05).The mean distance-corrected visual acuity at 25 cm, 30 cm, 33 cm, 40 cm, 50 cm, 60 cm, 70 cm were better in the multifocal group than in the monofocal group (P＜0.01). The near stereoscopic vision. in the multifocal group were better than in the monofocal group (P＜0.01). When near corrected,there were no significant difference between the stereoscopic vision for the multifocal and monofocal groups (P＞0.05). Conclusions The diffractive multifocal IOL with a low add power provides significantly better intermediate, near visual acuity than the monofocal IOL. When near uncorrected, the multifocal group has better stereoscopic vision. Spectacle independence is higher with the multifocal intraocular lens. Key words: Phacoemulsification; Intraocalar lens; Binocular; Stereoscopic vision; Full vision