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Comparison of visual outcomes and optical quality of bifocal or trifocal diffractive intraocular lens

Poster Details

First Author: Y.Park SOUTH KOREA

Co Author(s):    J. Lee   Y. Kim                 

Abstract Details


To evaluate and compare visual outcomes and optical quality after implantation of a bifocal (ReSTOR®) or trifocal (AT LISA tri®) diffractive intraocular lens


Cheil Eye Hospital, Daegu, Korea


Fifty-one eyes of 43 patients undergoing cataract surgery were enrolled and assigned to one of two groups: the bifocal group, including 27 eyes implanted with the bifocal diffractive IOL (Acrysof ReSTOR® SN6AD1), and the trifocal group, including 24 eyes implanted with the trifocal diffractive IOL (AT LISA tri 839MP®). Visual (distant, intermediate, near) and refractive postoperative outcomes were evaluated during a 2 week-3 month follow-up. Contrast sensitivity (CGT-2000®), Optical quality (OQAS II®), and defocus curve were measured 3 months postoperatively.


No statistically significant differences between groups were found in 3-months postoperative distant and near (40 cm) visual acuities and optical quality. However, intermediate (63 cm, 80 cm, 100 cm) visual acuities were significantly better in the trifocal group (P<0.01). In the defocus curve, the visual acuity was significantly better for defocus of +1.00 to +1.50 diopters, -1.00 to -1.50 diopters, and -3.00 to -3.50 diopters in the trifocal group (P<0.05). ReSTOR® showed significantly better distant contrast sensitivity (5 m) at mesopic condition and AT LISA tri® showed significantly better near contrast sensitivity (30 cm) at mesopic and scotopic condition(P<0.05).


Trifocal diffractive IOLs provide significantly better intermediate vision over bifocal IOLs, with equivalent postoperative levels of visual and ocular optical quality. Also it improved near contrast sensitivity at scotopic condition compared with diffractive bifocal IOL.

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