Intraocular lens doublet for wide angle correction of monochromatic and chromatic aberrations

Session Details

Session Title: Pseudophakic IOLs: Monofocal. Cataract Surgery Instrumentation

Session Date/Time: Saturday 05/09/2015 | 16:00-18:30

Paper Time: 17:00

Venue: Room 10

First Author: : E.Fernandez SPAIN

Co Author(s): :    J. Marin   P. Artal                 

Abstract Details

Purpose:

Most current intraocular lenses (IOLs) are based in a single lens design. However, with a single lens, perfect simultaneous correction for chromatic and monochromatic aberrations in a wide field cannot be theoretically achieved. In this work, we explored the potential benefits of an intraocular lens doublet, compounded by two materials, for a full correction of the aberrations in pseudophakic eyes.

Setting:

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

Methods:

A realistic eye model incorporating chromatic dispersion data from the ocular media was used to design the IOL doublets. Computational ray-tracing techniques were applied to optimize the optical performance of different IOLs configurations. Two standard materials, acrylic and silicone, were used in the designs. The analysis was performed in white light to consider chromatic aberration correction. Iterative optimization algorithms were applied to design the different doublet configurations to correct for longitudinal chromatic aberration, spherical aberration and off-axis aberrations within 10 degrees of retinal field.

Results:

IOL doublets with aspheric surfaces permitted to obtain near diffraction-limited retinal image quality over an extended range around the optical axis of 10 degrees. Chromatic aberration was typically reduced as much as 95 % compared to the value present in phakic eyes. Lateral color and sphero-chromatic aberration were also largely reduced as compared with the phakic normal eye, and also compared with the pseudophakic eye implanted with a standard IOL. The benefits in optical quality of the doublet IOL were maintained within a reasonable range of values of decentering and tilt. A tolerance analysis of the impact of biometrical parameters after surgery was also performed.

Conclusions:

The potential of a doublet IOL to provide full aberration correction after cataract surgery has been analyzed. By using two materials within an IOL and combining with proper aspheric surfaces, chromatic, spherical and off-axis aberrations can be simultaneously corrected. While an improvement in image quality should provide patients with a better quality of vision, the practical application of doublets IOL should be further explored in terms of manufacturing and surgical limitations.

Financial Interest:

NONE