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First Author: D.Madrid-Costa SPAIN
Co Author(s): J. Ruiz-Alcocer T. Ferrer-Blasco S. García-Lázaro R. Montés-Micó
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To compare the in-vitro optical quality at different focal points of two new bifocal intraocular lenses (IOLs) and one new trifocal IOL.
University of Valencia
In this experimental study, the AcrySof® ReSTOR® SV25T0 (+2.5D add) IOL and the AcrySof® ReSTOR® SN6AD1 (+3.0D add) IOL with two main foci and the AT LISA® tri 839 IOL with three main foci were evaluated. The optical quality of the IOLs was quantified by the modulation transfer function (MTF), measured with the PMTF optical bench at five different focal points (0.0, -1.5, -2.0, -2.5, -3.0D) and for 3.0 and 4.5mm apertures. The through-focus MTF of the IOLs was also recorded.
For the 0.00D the AcrySof® ReSTOR® (+2.5D add) IOL obtained the highest MTF values for all apertures. For the -2.5D focal point, the AcrySof® ReSTOR® (+3.0D add) IOL showed the highest MTF values for 3.0mm. For the -3.0D focal point at 3.0 and 4.5mm of aperture, the best values were obtained with the AcrySof® ReSTOR® (+3.0D add) IOL and the AT LISA® IOL, respectively. For the -1.5D the trifocal IOL provided better values. For the -2.0D focal point all the IOLs provided comparable results. The through-focus MTF curves showed 3 and 2 peaks for the trifocal and the bifocal IOLs, respectively.
The trifocal IOL provides a better optical quality at -1.5D focal point. However, the optical quality of the trifocal IOL significantly decreases compared to the bifocal IOLs at far and -2.5D focal points.