Postoperative visual performance with a bifocal and trifocal diffractive intraocular lens during a 1-year follow-up.

Aim: To evaluate and compare the clinical outcomes with a diffractive bifocal and trifocal intraocular lens (IOL) during a 12-month follow-up.

Methods: Prospective comparative study including 75 eyes of 38 patients (44-70y) undergoing uneventful cataract surgery. Each patient was randomly assigned to one type of IOL, bifocal (35 eyes) or trifocal (40 eyes).

Comparative analysis of the visual performance after cataract surgery with implantation of a bifocal or trifocal diffractive IOL.

Purpose: To evaluate and compare the visual, refractive, contrast sensitivity, and aberrometric outcomes with a diffractive bifocal and trifocal intraocular lens (IOL) of the same material and haptic design.

Methods: Sixty eyes of 30 patients undergoing bilateral cataract surgery were enrolled and randomly assigned to one of two groups: the bifocal group, including 30 eyes implanted with the bifocal diffractive IOL AT LISA 801 (Carl Zeiss Meditec, Jena, Germany), and the trifocal group, including eyes implanted with the trifocal diffractive IOL AT LISA tri 839 MP (Carl Zeiss Meditec). Analysis of visual and refractive outcomes, contrast sensitivity, ocular aberrations (OPD-Scan III; Nidek, Inc.