Impact of light intensity and temperature on reading performance following bilateral pseudophakic multifocal presbyopic correction

Session Details

Session Title: Advanced Optic IOLs

Session Date/Time: Tuesday 17/09/2019 | 08:30-10:30

Paper Time: 09:16

Venue: Free Paper Forum: Podium 1

First Author: : G.Labiris GREECE

Co Author(s): :    E. Panagiotopoulou   M. Gkika   A. Konstantinidis   I. Perente   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, Alexandroupolis, Greece

Methods:

This is a prospective clinic-based trial conducted at the Department of Ophthalmology in the University Hospital of Alexandroupolis, Greece. Three groups of patients were formed (G1: patients with bilateral bifocal implantation, G2: patients with bilateral trifocal implantation, and 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, and 75 Foot-Candles [FC]) and temperatures (3,000, 4,000, and 6,000 K). Preferred light conditions for reading were assessed, as well.

Results:

Control group demonstrated significantly lower reading ability at all light combinations with maximal ability at 75 FC and 6,000 K (0.58 ± 0.18 logMAR). Bifocal group presented a light-dependent reading ability that ranged from 0.45 ± 0.08 logMAR (25 FC and 3,000 K) to 0.40 ± 0.11 logMAR (75 FC and 4,000 or 6,000 K). Trifocal participants presented the best reading ability that was light intensity-independent; however, their performance was reduced at 6,000 K. G1 and G2 preferred primarily intermediate light temperature, while control participants preferred cold light temperature.

Conclusions:

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

Financial Disclosure:

None