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- Title
The role of binocular vision in walking.
- Authors
Hayhoe, Mary; Gillam, Barbara; Chajka, Kelly; Vecellio, Elia
- Abstract
Despite the extensive investigation of binocular and stereoscopic vision, relatively little is known about its importance in natural visually guided behavior. In this paper, we explored the role of binocular vision when walking over and around obstacles. We monitored eye position during the task as an indicator of the difference between monocular and binocular performances. We found that binocular vision clearly facilitates walking performance. Walkers were slowed by about 10% in monocular vision and raised their foot higher when stepping over obstacles. Although the location and sequence of the fixations did not change in monocular vision, the timing of the fixations relative to the actions was different. Subjects spent proportionately more time fixating the obstacles and fixated longer while guiding foot placement near an obstacle. The data are consistent with greater uncertainty in monocular vision, leading to a greater reliance on feedback in the control of the movements.
- Subjects
BINOCULAR vision; STEREOSCOPIC views; MONOCULAR vision; VISION disorders; VISUAL perception; NEUROBIOLOGY
- Publication
Visual Neuroscience, 2009, Vol 26, Issue 1, p73
- ISSN
0952-5238
- Publication type
Article
- DOI
10.1017/S0952523808080838