Binocular function after bilateral implantation of monofocal and refractive multifocal intraocular lenses

Purpose: To evaluate binocular function after bilateral implantation of a refractive multifocal intraocular lens (IOL). Methods:Contrast sensitivity, glare, depth discrimination, and distance and, near visual acuity were examined in 21 patients with a multifocal IOL and 15 patients with a monofocal IOL. Results: There was no significant difference in binocular distance visual acuity between the 2 groups. In near visual acuity with distance correction, the multifocal group had a significant advantage in monocular and binocular vision (P < .05). High contrast with Regan contrast letter acuity charts did not differ significantly between the groups. However, at a contrast of 11%, sensitivity was significantly lower monocularly in the multifocal group. Contrast sensitivity in this group was not significantly lower binocularly. The brightness acuity tester revealed no between group difference in glare. With the Titmus stereotest, depth discrimination was significantly better with the multifocal IOL with distance correction. Conclusion: Bilateral implantation of a refractive multifocal IOL-provided:good binocular function and alleviated the well-known disadvantage of reduced contrast I sensitivity at low contrast levels.