Contextual Binocular Imbalance Impairs Local Stereopsis.

ABSTRACT:

Purpose

Binocular imbalance is known to inhibit stereopsis. This study investigates whether an imbalanced context around stereo stimuli also affects local stereopsis and explores the underlying mechanisms.

Methods

Three experiments were conducted with normally sighted participants. Experiment 1 measured local stereo detection thresholds under three context conditions: binocular balance (0.5 vs. 0.5 contrast), left-eye dominance (0.8 vs. 0.2 contrast), and right-eye dominance (0.2 vs. 0.8 contrast). Experiment 2 assessed the modulation of the imbalance effect by context-target collinearity. Experiment 3 examined the imbalance effect with binocular fusion and rivalry context stimuli.

Results

In experiment 1, the average stereo threshold was 62.4 arcsec in the binocular

SUBMITTER: Jiang R 

PROVIDER: S-EPMC11892528 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature