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Comparison of through-focus optical performance of bifocal and trifocal intraocular lenses using an optical bench system with clinical defocus curve

Poster Details

First Author: R.Fernández-Buenaga SPAIN

Co Author(s):    A. Plaza-Puche   J. Alio   S. MacRae   L. Zheleznyak   E. Sala   G. Yoon

Abstract Details


To correlate the through-focus image quality analysis obtained in an optical bench with the defocus curves after implantation of two multifocal and a monofocal IOLs.


Vissum Corporacion, Miguel Hernández University, University of Rochester


This study included a total of 71 eyes of 42 patients with ages ranging between 36-84 years. Three groups of eyes were differentiated: group A, 28 eyes implanted with the bifocal rotationally asymmetric multifocal IOL Lentis Mplus-LS-312; group B, 22 eyes implanted with the diffractive trifocal FineVision IOL and group C, 21 eyes implanted with the monofocal Acrysof SA60AT IOL. Optical bench through-focus performance was evaluated by calculating cross-correlation coefficients and comparing the likenesses of captured images of a resolution target and a perfect reference image.


In the defocus curve significantly better visual acuity was present in eyes implanted with the bifocal IOL. This difference among curves reached statistical significance for the levels of defocus of -4.00, -2.50, -2.00, -1.5, -1.0, -0.5 and +1.0D (p≤0.04). Significant and strong correlations were found between the cross-correlation coefficients and decimal visual acuity scale in all groups (group A; r=0.90, p<0.01, group B; r=0.83, p<0.01, group C; r=0.98 p<0.01). For these relationships, a linear predicting models with predictability (R2) of 0.795 for group A, R2 of 0.776 for group B and R2 of 0.953 for group C was obtained.


A very significant correlation were found between decimal visual acuity and cross-correlation coefficients in all groups. The bifocal IOL showed to be more effective providing a more accurate visual rehabilitation than the trifocal and monofocal IOLs. FINANCIAL INTEREST: NONE

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