Effect of different hybrid intraocular lenses (IOLs) on the optical property of polychromatic vision

Abstract

The popular treatment of cloudy eyes (cataracts) replaces the cloudy natural lens with an artificial intraocular lens (IOL). The spherical and chromatic aberration are the main factors that affect the IOL image quality. This paper uses hybrid (refractive-diffractive) intraocular lenses with an aspherical surface to minimize chromatic and spherical aberrations. Three types of hybrid IOLs are selected to replace the eye crystal lens, and their performances are evaluated and compared with the healthy eye, based on the results estimated from Liou and Brennan eye model (LBEM). The vision is assessed by calculating the polychromatic modulation transfer function (MTF), the point spread function (PSF), the longitudinal chromatic aberration (LchC), and the encircled energy (EE) using the ray-tracing Zemax program. The results indicate that the polychromatic vision with PMMA hybrid IOL gives the best optical performance compared with other hybrid IOLs and provides a magnitude of (LchC) comparable with a healthy eye.