Abstract
Purpose: To demonstrate the advantage of multifocal IOLs, designed to compensate for the average spherical aberration of the cornea as the new Tecnis ZMA00 acrylic diffractive lens. Methods: The performance of different multifocal IOLs is studied in a model eye with a physiological cornea. The influence of pupil size is demonstrated by visualizing the light path and the retinal image in the different focal points of the projection of a US Air Force target in monochromatic green and in white light. Lenses to be tested are aspheric and spherical, diffractive and refractive multifocal lenses like the full diffractive Tecnis ZM900 and ZMA00 lenses, the apodized diffractive Acrysof Restor SA60D3 and SN6AD3 lenses and the refractive ReZoom NXG1 multifocal lens. Results: Multifocal IOLs that are corrected for the average corneal spherical aberration and especially the hydrophobic acrylate Tecnis ZMA00 lens show an optical behaviour that is practically independent of pupil size. This is demonstrated for pupil sizes of 3 and 5mm. Conclusions: The Tecnis ZM multifocal lenses are well equipped for patients in different light conditions.
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