Evaluation of a novel measurement method using an eye-tracking device to assess quality of reading with different presbyopia-correcting approaches

Session Details

Session Title: Quality of Vision Evaluation

Session Date/Time: Tuesday 17/09/2019 | 16:30-18:00

Paper Time: 17:12

Venue: Free Paper Forum: Podium 4

First Author: : S.Amir-Asgari AUSTRIA

Co Author(s): :    I. Baumhauer   N. Hirnschall   M. Ruiß   M. Agiorgiotakis   S. Plainis   O. Findl              

Abstract Details

Purpose:

This study aimed to assess the influence of different approaches to correct presbyopia after cataract surgery (extended range of vision IOL with micro-monovision, mini-monovision with standard IOL, and single focus distance vision with standard IOL as control) on reading quality using an eye tracking device to evaluate ocular fixation times and saccades.

Setting:

Vienna Institute for Ocular Surgery (VIROS), Hanusch Hospital, Vienna, Austria

Methods:

In this ongoing prospective study, a total of 45 pseudophakic patients are enrolled in 3 different groups of 15 patients each: extended range of vision IOL (Symfony Tecnis, J&J), minimonovision standard IOL with a difference od 1.25 D, and single focus distance vision with standard IOL as control group. Each patient's reading performance and eye movements were evaluated with the eyetracking device Eyelink 1000 (SR Research Ltd, Canada) at photopic and mesopic lighting conditions. The number of fixations, the fixation duration, the forward saccadic length and the percentage of backward saccades (regressions) and reading speed were analysed.

Results:

Reading speed decreased in all groups between a high luminance/ high contrast test set-up to high luminance/ low contrast set-up significantly (Symfony 242.4 wpm high/high vs. 184.0 wpm high/low; MMV 256,1 wpm high/high vs 188,6 wpm high /low; SFDV 210,9 wpm high/high vs 142,6 wpm high/low). Consequently, the number of forward fixations increased in all groups. The difference in reading speed and forward fixations was not found to be significant between all groups. Single focus distance vision was found to be the only group not able to read the low luminance/ low contrast set-up.

Conclusions:

Fixation, duration of fixation and saccades of pseudophakic patients with different IOLs lead to a better understanding of reading behaviour and consequently IOL choice. Further data will be presented at ESCRS.

Financial Disclosure:

None