Emerging Clinical Data On A Novel Metric To Measure Eye Dominance And Dominance Strength
Published 2023 - 41st Congress of the ESCRS
Reference: FP12.01 | Type: Free paper | DOI: 10.82333/09t5-rk12
Authors: Vance Thompson* 1 , Phillip Hoopes 2 , George Waring IV 3 , Jay Pepose 4 , Luke Rebenitsch 5 , Scott MacRae 6 , Kendall Donaldson 7 , Irene Siso-Fuertes 8 , Susana Marcos 9 , Daniel Durrie 10
1Vance Thompson Vision,Sioux Falls,United States, 2Hoopes Vision,Salt Lake City,United States, 3Waring Vision Institute,Charleston,United States, 4Midwest Vision Research Foundation,Saint Louis,United States, 5Clearsight Center,Oklahoma City,United States, 6Flaum Eye Institute, University of Rochester,Rochester,United States, 7Bascom Palmer Eye Institute, University of Miami,Miami,United States, 82EyesVision,Madrid,Spain, 9University of Rochester,Rochester,United States;VioBio Lab, Instituto de Óptica, CSIC,Madrid,Spain, 10iOR Partners,Kansas City,United States
Purpose
To demonstrate a novel approach to measuring the laterality and strength of eye dominance using a binocular visual simulator (SimVisGekko, 2EyesVision) in a clinical setting. The technique is particularly suited to optimize monovision-like corrections for presbyopia, as it relies on the eye preference for monovision.
Setting
Vance Thompson Vision, SD, USA
Hoopes Vision, UT, USA
Waring Vision Institute, SC, USA
Midwest Vision Research Foundation, MO, USA
Clearsight Center, OK, USA
Methods
A novel eye dominance test was performed by 263 subjects (35±11yo; SE-0.54±1.23D) from 5 clinical sites. A commercial binocular, see-through, programmable visual simulator (SimVisGekko) was used to rapidly induce the near add (+1.50D) in one eye, over both eyes best distance-corrected. Subjects performed a forced-choice preference task judging the perceived image quality of a face image through alternative monovision corrections. This was repeated 10 times and the Eye Dominance Strength (EDS) was determined as a percentage. EDS was classified into strong (90-100%), weak (70-80%), and equidominance (50-60%). The test was performed at distance (D) and near (N) with vergence compensation. Hole-in-the-card (HC) test was used for comparison.
Results
A higher percentage of subjects showed strong EDS (53% in D and 58% in N settings), and a lower percentage showed weak dominance (D: 23%, N: 22%) or equidominance (D: 24%, N: 20%). Presbyopic patients (n=42, ≥45 yo) also showed strong EDS (D: 48%, N: 64%), with lower percentage of weak EDS (D: 31%, N: 14%) and equidominance (D: 21%, N: 21%). Although EDS tends to be slightly higher at N than D conditions, EDS at N and D statistically correlate, both for the entire cohort (p<0.001; r=0.513; slope= 0.53) and presbyopes (p<0.001; r=0.691; slope= 0.797). However, differences in the selection of the dominant eye from the new and standard test (HC) were statistically significant, as they differed in 41% of the patients.
Conclusions
The SimVisGekko Eye Dominance Strength test evaluates not only the dominant eye, but also the strength of this dominance, unlike the binary standard clinical tests (such as HC). The majority of the patients (>50% on average) exhibit strong eye dominance, with a slight preference for the right eye. The test has proved robust across conditions (distance or near -compensating for vergence-), and age. The test is rapid to administer (<2 min) and, given that it tests directly preference to monovision (with near add in right or left eye) it appears highly suitable to select the most suitable monovision-like correction in a presbyopia managing clinic.