Effect of Interocular Contrast Difference on Stereopsis in Observers With Sensory Eye Dominance.

ABSTRACT:

Purpose

We investigated how sensory eye dominance (SED) affects stereopsis when the half-images of random-dot-stereo stimuli had different interocular contrast.

Methods

We measured crossed and uncrossed stereo disparity thresholds and reaction time to seeing random-dot-stereograms with variable interocular contrast differences (ICD), where ICD = (log10 [CLE] - log10 [CRE]) = -0.4, -0.2, 0, 0.2, or 0.4 log unit. The mean contrast of the stimuli, (log10 [CLE] + log10 [CRE])/2, remained constant at 1.2 log unit to ensure that the measured effect was solely due to ICD. We also measured SED using, respectively, dichoptic horizontal sine wave gratings with different phases (revealing SEDcombo) and dichoptic vertical and horizontal gratings (revealing SEDinhibition).

Results

SUBMITTER: Han C 

PROVIDER: S-EPMC6656411 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature