Posters

Impact of light on reading ability following multifocal pseudophakic corrections

Poster Details

First Author: G.Labiris GREECE

Co Author(s): E. Panagiotopoulou   M. Gkika   A. Konstantinidis   D. Dardabounis   K. Ioannakis        

Abstract Details

Purpose:

To examine the impact of light intensity and temperature on reading performance following bilateral pseudophakic multifocal presbyopic correction.

Setting:

Department of Ophthalmology, University Hospital of Alexandroupolis

Methods:

This is a prospective clinic-based trial. Three groups of patients were formed [G1: patients with bilateral bifocal implantation, G2: patients with bilateral trifocal implantation, and CG (control group): patients with bilateral pseudophakic monofocal implantation]. Reading ability was quantified with the Greek version of MNREAD chart with minimal reading speed at 80 words/min for the following light intensities (25, 50, 75 Foot-Candles) and temperatures 3000, 4000 & 6000 Kelvins). Preferred light conditions for reading were assessed, as well.

Results:

CG demonstrated significantly lower reading ability at all light combinations with maximal ability at 75FC and 6000 Kelvins (0.58 ± 0.18 logMAR, p=0.03). Bifocal group presented a light dependent reading ability that ranged from 0.45 ± 0.08 logMAR (25FC & 3000 Kelvins) to 0.40 ± 0.11 logMAR (75FC & 4000 or 6000 Kelvins). Trifocal participants presented the best reading ability that was light-independent, however their performance was reduced at 6000 Kelvins. G1 and G2 preferred primarily intermediate light temperature, while control participants cold light temperature.

Conclusions:

Multifocal pseudophakic corrections improve reading ability, however, they present variable efficacy according to the light conditions.

Financial Disclosure:

None