Optical bench performance of 3 trifocal intraocular lenses.

PURPOSE

To compare the optical performance of 3 trifocal intraocular lenses (IOLs): the Acrysof IQ Panoptix (+2.17 diopter [D]/+3.25 D IOL), AT LISA Tri 839MP (+1.66 D/+3.33 D IOL), and Finevision Micro F (+1.75 D/+3.50 D IOL).

SETTING

Alcon Research Ltd., Fort Worth, Texas, USA.

DESIGN

Experimental study.

METHODS

The 3 trifocal IOLs were compared using optical performance tests. To measure image quality, through-focus modulation transfer function (MTF) curves were generated for a model eye. To assess resolution, through-focus Badal images of an Early Treatment Diabetic Retinopathy Study chart simulating viewing distances of infinity to 40 cm were recorded. To measure photic phenomena, simulated headlight images with a 50 μm pinhole target and a 5.0 mm pupil were obtained.

RESULTS

The MTF measurements showed similar near and distance peaks for the IOLs, but the optimum intermediate peak for the +2.17 D/+3.25 D IOL was 60 cm versus 80 cm for the other 2 trifocal IOLs. Similarly, in bench Badal image testing, the optimum intermediate image was at 60 cm for the +2.17 D/+3.25 D IOL and 80 cm for the other 2 IOLs. Overall, halos surrounding simulated headlight images were equivalent for the 3 IOLs.

CONCLUSIONS

In bench studies, the new +2.17 D/+3.25 D trifocal IOL showed equivalent or better performance in image quality, resolution, and photic phenomena compared with the +1.66 D/+3.33 D and +1.75 D/+3.50 D trifocal IOLs. The new IOL is expected to provide better intermediate vision at 60 cm, which is preferred for real-life tasks such as computer work, over the 80 cm intermediate distance offered by the other 2 trifocal IOLs.

FINANCIAL DISCLOSURE

All authors are employees of Alcon Research, Ltd.