Factors limiting sensitivity to binocular disparity in human vision: Evidence from a noise-masking approach.

ABSTRACT: Our visual system uses the disparity between the images received by the two eyes to judge three-dimensional distance to surfaces. We can measure this ability by having subjects discriminate the disparity of rendered surfaces. We wanted to know the basis of the individual differences in this ability. We tested 53 adults with normal vision using a relative disparity detection task. Targets were wedge-shaped surfaces formed from random dots. These were presented in either crossed or uncrossed disparity relative to a random dot background. The threshold disparity ranged from 24 arc seconds in the most-able subject to 275 arc seconds in the least-able subject. There was a small advantage for detecting crossed-disparity targets. We used the noise-masking paradigm to partition subject performance

SUBMITTER: Alarcon Carrillo S 

PROVIDER: S-EPMC7405759 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature