Abstract
PURPOSE: To compare visual performance among 3 types of higher-order aspheric enhanced monofocal intraocular lenses (IOLs) and a standard aspheric monofocal IOL. SETTING: Hayashi Eye Hospital, Fukuoka, Japan. DESIGN: Randomized comparative study. METHODS: 344 eyes of 172 patients scheduled for phacoemulsification were randomly assigned to one of the 4 groups according to the IOL type: 3 types of enhanced monofocal IOL, (1) Eyhance, (2) Impress, and (3) NSP-3, and a standard monofocal IOL, (4) Tecnis monofocal. At 2 months postoperatively, monocular and binocular distance-corrected visual acuity (VA) from far to near simulated distances, photopic and mesopic contrast VA, and degree of halo and glare symptoms were measured and compared among groups. RESULTS: Mean monocular and binocular distance-corrected intermediate VA at 0.5, 0.7, and 1.0 m was essentially better in the 3 enhanced monofocal IOL groups than in the standard monofocal IOL group ( P ≤ .04), whereas mean far and near distance-corrected VAs at 0.3, 2.0, 3.0, 5.0, and ∞ m did not differ significantly among the 4 groups. Mean photopic and mesopic contrast VA and the size and intensity of halo and glare symptoms did not differ significantly among groups. CONCLUSIONS: The 3 enhanced monofocal IOL types evaluated provided significantly better intermediate VA than a standard monofocal IOL with no significant deterioration in contrast sensitivity or photic symptoms. All visual performance test results examined were comparable among the 3 enhanced monofocal IOL types, suggesting that enhanced monofocal IOLs can serve as a replacement for standard monofocal IOLs.