Posters

Wide-angle and achromatic refractive intraocular lens

Poster Details

First Author: E. Fernandez SPAIN

Co Author(s):    P. Artal                    

Abstract Details

Purpose:

The incorporation of chromatic aberration correction in intraocular lenses (IOLs) should provide an enhanced vision. In this work, a new paradigm for advanced IOL design is proposed to correct all aberrations in the pseudophakic eye for larger extended field of view.

Setting:

Laboratorio de Optica, Instituto Universitario de Investigacion en Optica y Nanofisica, Universidad de Murcia

Methods:

A chromatic eye model was used to develop new IOLs designs. Iterative ray-tracing techniques were applied to optimize the optical performance of distinct IOLs configurations. Realistic values of chromatic dispersion found in acrylics and silicones were employed in the designs. Different combinations of simple and heterogeneous materials were used to obtain a family of IOLs capable to correct chromatic aberration, spherical aberration and off-axis aberrations within an extended retinal patch of up to 10 degrees. Data from real eyes were later implemented in the model to test the benefits of the new IOLs under natural high order aberrations.

Results:

The incorporation of aspheric profiles on the IOL’s surfaces allowed near diffraction-limited retinal images in addition of chromatic aberration correction. The design was optimized over a field of 10 degrees around the optical axis, also correcting transverse chromatic aberration. Chromatic aberration was typically reduced as much as 95 % compared to the value found in phakic eyes. Lateral color and sphero-chromatic aberration were also largely reduced. The benefits of the proposed IOL were maintained within typical physiological values of decentering and tilt, also when tested under natural aberrations from real eyes.

Conclusions:

The benefits of a pure refractive IOL to provide full aberration correction after cataract surgery has been explored. The simplest configuration is the combination of two materials with different chromatic dispersion, forming a doublet IOL. Other solutions based on heterogeneous materials were equally effective from an optical perspective. The practical implementation of such solutions should be further evaluated to elucidate the most effective design in terms of manufacturing, and surgical limitations.

Financial Disclosure:

One or more of the authors has significant investment interest in a company producing, developing or supplying product or procedure presented