Posters

Intraocular lens refractive index and its impact on external surface reflections.

Poster Details

First Author: G.Kymionis SWITZERLAND

Co Author(s):    M. Petrelli   L. Schmutz   M. Grentzelos   K. Hashemi   G. Wagnières        

Abstract Details

Purpose:

To study the external surface reflections (clinically related to “cat’s eye” phenomenon) produced by commonly used intraocular lenses (IOLs).

Setting:

Jules Gonin Eye Hospital, University of Lausanne, Lausanne Switzerland

Methods:

Anterior surface reflected glare was studied in 8 IOLs (IOL power 22.0D) with different refractive indices. The experimental set up included a laser beam light source (with power of 3.5 mW) operating at a wavelength of 532nm and a water-filled eye model containing the IOL to be examined. External surface reflections were measured using a laser power meter and compared in terms of IOL surface reflectivity (%).

Results:

A positive correlation was observed and external reflections from the anterior surface of the studied implants increased as the refractive index of each IOL material increased. The AcrySof IQ series IOLs (models SN60WF and SA60AT) composed of high-index material (n=1.55) were found to increase external surface reflections almost 2-fold compared to lower refractive index IOLs.

Conclusions:

High refractive index IOLs such as AcrySof IQ SN60WF and SA60AT are associated with higher external surface reflections related to the “cat’s eye” phenomenon seen in pseudophakic eyes by an outside observer.

Financial Disclosure:

None