Association between Ocular Sensory Dominance and Refractive Error Asymmetry

Authors

Feng Jiang, Medical School of Chinese PLA
Zheyi Chen, Eye Hospital of Wenzhou Medical University
Hua Bi, Nova Southeastern UniversityFollow
Edgar Ekure, Nova Southeastern University
Binbin Su, Eye Hospital of Wenzhou Medical University
Haoran Wu, Eye Hospital of Wenzhou Medical University
Yifei Huang, Medical School of Chinese PLA
Bin Zhang, University of HoustonFollow
Jun Jiang, Eye Hospital of Wenzhou Medical UniversityFollow

ISSN

1932-6203

Publication Date

8-21-2015

Abstract

Purpose

To investigate the association between ocular sensory dominance and interocular refractive error difference (IRED).

Methods

A total of 219 subjects were recruited. The refractive errors were determined by objective refraction with a fixation target located 6 meters away. 176 subjects were myopic, with 83 being anisometropic (IRED ≥ 0.75 D). 43 subjects were hyperopic, with 22 being anisometropic. Sensory dominance was measured with a continuous flashing technique with the tested eye viewing a Gabor increasing in contrast and the fellow eye viewing a Mondrian noise decreasing in contrast. The log ratio of Mondrian to Gabor’s contrasts was recorded when a subject just detected the tilting direction of the Gabor during each trial. T-test was used to compare the 50 values collected from each eye, and the t-value was used as a subject’s ocular dominance index (ODI) to quantify the degree of ocular dominance. A subject with ODI ≥ 2 (p < 0.05) had clear dominance and the eye with larger mean ratio was the dominant one. Otherwise, a subject had an unclear dominance.

Results

The anisometropic subjects had stronger ocular dominance in comparison to non-anisometropic subjects (rank-sum test, p < 0.01 for both myopic and hyperopic subjects). In anisometropic subjects with clear dominance, the amplitude of the anisometropia was correlated with ODI values (R = 0.42, p < 0.01 in myopic anisometropic subjects; R = 0.62, p < 0.01 in hyperopic anisometropic subjects). Moreover, the dominant eyes were more myopic in myopic anisometropic subjects (sign-test, p < 0.05) and less hyperopic in hyperopic anisometropic subjects (sign-test, p < 0.05).

Conclusion

The degree of ocular sensory dominance is associated with intraocular refractive error difference.

DOI

10.1371/journal.pone.0136222

Volume

10

Issue

8

First Page

1

Last Page

12

Disciplines

Optometry

NSUWorks Citation

Jiang, Feng; Chen, Zheyi; Bi, Hua; Ekure, Edgar; Su, Binbin; Wu, Haoran; Huang, Yifei; Zhang, Bin; and Jiang, Jun, "Association between Ocular Sensory Dominance and Refractive Error Asymmetry" (2015). Faculty Articles. 30.
https://nsuworks.nova.edu/hpd_opt_facarticles/30