Posters

Laboratory through-focus image comparison of three presbyopia-correcting IOL models

Poster Details

First Author: J.He USA

Co Author(s):    D. Carson   Z. Xu   E. Alexander   M. Choi           

Abstract Details

Purpose:

To compare through-focus image performance of three presbyopia correcting IOL models.

Setting:

Vision Science/Optics Laboratory at Alcon Laboratories, Fort Worth, Texas, USA.

Methods:

Laboratory bench simulation of retinal images for pseudophakic eyes was performed with a novel presbyopia correcting IOL, the Zeiss AT Lisa tri 839 MP, and the PhysIOL FineVision Micro F12 IOLs. Badal images simulating the viewing distance from infinity to 40 cm were generated with IOLs in a model eye having a 3.0 mm pupil at the IOL plane. Headlight images were collected using a pinhole image with 5.0 mm pupil on the bench at the distance focus for each IOL. The areas under cross-sections of the images were compared.

Results:

The novel presbyopia correcting IOL has a good distance focus, with an intermediate focus at 60 cm and the near focus at 40 cm. The 20/40 equivalent text line is resolvable with this IOL from 80 cm to 40 cm. The Zeiss AT Lisa tri and PhysIOL FineVision IOLs show good distance and near images, with intermediate images at 80 cm, however both have strong shadows around letters at the intermediate image. Headlight images of all three models were comparable, with similar amounts of halo surrounding the central images.

Conclusions:

All IOLs tested provide distance, near, and intermediate vision in the laboratory simulation. The novel presbyopia correcting IOL provides an intermediate image at 60 cm, which is believed to be a better choice for viewing devices such as smartphones and tablets than the 80 cm distance of AT Lisa and FineVision. AT Lisa and FineVision also exhibit strong shadows around letters at the intermediate focus that some patients may find objectionable. The headlight simulation predicts similar halos for all three IOLs at the distance focus with larger pupils.

Financial Disclosure:

One or more of the authors is employed by a for-profit company with an interest in the subject of the presentation