Author: Zoulinakis Georgios, University of Valencia

In a new study simulations of intraocular lenses (IOLs) and contact lenses (CLs) were designed in eye models with customized corneal topographies. Topographic data were collected with Medmont E300 Corneal Topographer from 10 normal corneas and 12 astigmatic. The data were fitted with a series of Zernike polynomials and input in an optical design software in order to design the customized corneas for the eye models.

A series of optimized and non-optimized IOLs and CLs were designed in order to test which would be a better way to correct presbyopic visual problems. For this we collected data such as wavefront root mean square (RMS) error on retinal field and visual Strehl ratio based on the optical transfer function (VSOTF).

Our results show that a combination of two lenses (IOL and CL), even if they are non-optimized, offers a better visual quality, instead of using one optimized lens. A combination of two non-optimized lenses offers decreased visual quality from a combination of fully optimized lenses but that decrease amounts on average to less than 0.1 logMAR.

This study has been submitted in ARVO 2016, Seattle, USA.

Figure: VSOTF and wavefront RMS results. IOL stands for intraocular lens, IOL&CL stands for intraocular and contact lens, opt stands for optimized and non opt stands for non-optimized lenses.