Document Type
Article
Abstract
Eye dominance is often defined as a preference for the visual input of one eye to the other. Implicit in this definition is the dominant eye has better visual function. Several studies have investigated the effect of visual direction or defocus on ocular dominance, but there is less evidence connecting ocular dominance and monocular visual thresholds. We used the classic “hole in card” method to determine the dominant eye for 28 adult observers (11 males and 17 females). We then compared contrast thresholds between the dominant and non-dominant eyes using grating stimuli biased to be processed more strongly either by the magnocellular (MC) or parvocellular (PC) pathway. Using non-parametric mean rank tests, the dominant eye was more sensitive overall than the non-dominant eye to both stimuli (z = −2.54, p = 0.01). The dominant eye was also more sensitive to the PC-biased stimulus (z = −2.22, p = 0.03) but not the MC-biased stimulus (z = −1.16, p = 0.25). We discuss the clinical relevance of these results as well as the implications for parallel visual pathways.
Publication Date
3-12-2020
Publication Title
Vision
Volume
4
Issue
19
DOI
10.3390/vision4010019
Recommended Citation
Foutch, Brian K. and Bassi, Carl J., "The Dominant Eye: Dominant for Parvo- But Not for Magno-Biased Stimuli?" (2020). Educator Preparation & Leadership Faculty Works. 77.
DOI: https://doi.org/10.3390/vision4010019
Available at:
https://irl.umsl.edu/epir/77
