Visual Outcomes in Eyes With a Distance-Dominant Diffractive Multifocal IOL With Minimal Near Addition Power
Purpose
To compare monocular and binocular visual function between eyes with a distance-dominant diffractive multifocal intraocular lens (IOL) with low addition power (+2.5 diopters [D]), and eyes with a monofocal IOL.
Methods
Sixty-four eyes of 32 patients undergoing implantation of a diffractive multifocal IOL (Alcon ReSTOR® +2.5D, SN6AD2) with a +2.5 D addition, and 64 eyes of 32 age-matched patients undergoing implantation of a monofocal IOL (SN60WF) were recruited. At 3 months postoperatively, visual acuity (VA) from far to near distances, contrast VA and that with glare (glare VA), higher-order aberrations, and glare and halo symptoms were evaluated.
Results
For monocular and binocular VA, mean uncorrected and distance-corrected near VA at 0.3 m and intermediate VA at 0.5 m were significantly better in the multifocal group than the monofocal group (P≤ .0412). VA at other distances did not differ significantly between groups. Photopic and mesopic contrast VA and glare VA, and ocular and internal optic higher-order aberrations were similar between groups. The percentage of patients who reported glare symptoms did not differ significantly between groups, while the percentage of patients who reported halo symptoms was greater in the multifocal group (P=. 0009).
Conclusion
A distance-dominant diffractive multifocal IOL with +2.5D addition provided useful VA at all distances, especially at intermediate distances. Contrast sensitivity with and without glare, optical quality, and glare symptom with this multifocal IOL were comparable to those with a monofocal IOL, although halo symptom was more prominent.