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In vitro optical quality differences between bifocal and trifocal apodized diffractive intraocular lenses

Poster Details

First Author: D.Madrid-Costa SPAIN

Co Author(s):    J. Ruiz-Alcocer   C. Pérez-Vives   T. Ferrer-Blasco   R. Montés-Micó     

Abstract Details



Purpose:

To compare the in vitro optical quality of multifocal apodized intraocular lenses (IOLs) at different focal points.

Setting:

University of Valencia, Valencia, Spain.

Methods:

The Acrysof Restor +3.0 diopter (D) multifocal IOL with 2 main foci (bifocal IOL) and the Finevision multifocal IOL with 3 main foci (trifocal IOL) were evaluated. The optical quality was quantified using the modulation transfer function (MTF) at 7 focal points and for 3.5 mm and 5 mm apertures. The through-focus MTF at 10 focal points of the IOLs was also recorded.

Results:

For the 0.0 D and -2.5 D focal points, the bifocal IOL showed the highest MTF values for pupil sizes as well as for the -3.0 D focal point for a 3.5 mm aperture. For the -1.5 D and -3.5 D focal points, the trifocal IOL provided better MTF values, whereas for -2.0 D and -4.0 D both IOLs provided comparable results for both apertures. The through-focus MTF curves showed 3 and 2 peaks for the trifocal IOL and the bifocal IOL, respectively. With the bifocal IOL, better peak values were obtained at the 0.0 D, -2.0 D, -2.5 D, and -3.0 D focal points, while the trifocal IOL yielded better peak values at the -1.5 D and -3.5 D focal points.

Conclusions:

The bifocal IOL is likely to provide a greater range of vision from distance to near than the trifocal IOL; however, at the intermediate focal point (-1.5 D), the trifocal IOL will probably yield better optical quality. FINANCIAL INTEREST: NONE

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