Document Detail

Binocular combination of contrast signals from orthogonal orientation channels.
MedLine Citation:
PMID:  7483300     Owner:  NLM     Status:  MEDLINE    
In a series of psychophysical experiments, observers compared the apparent contrast of a dichoptic stimulus (contrast edges of orthogonal orientations in the two eyes) and a monocular stimulus ( a pie pattern in one eye and a blank field in the other eye). When the contrast of the dichoptic stimulus was low (2-3%) the two orthogonal edges were perceived as a stable pie pattern and its apparent contrast matched with that of a monocular pie pattern whose contrast was twice the contrast of the dichoptic stimulus. The dichoptic contrast gain (monocular/dichoptic contrast ratio) decreased with increasing dichoptic contrast. Although the observers showed an inability to discriminate the apparent contrasts of the dichoptic and the monocular pie patterns, they were able to tell which stimulus was the dichoptic one in a forced choice paradigm. A binocular contrast preservation model was proposed for binocular combination of contrast signals from orthogonal orientation channels.
L Liu; C M Schor
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  35     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1995 Sep 
Date Detail:
Created Date:  1995-12-12     Completed Date:  1995-12-12     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  2559-67     Citation Subset:  IM; S    
School of Optometry, University of California at Berkeley 94720, USA.
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MeSH Terms
Contrast Sensitivity / physiology*
Depth Perception / physiology*
Discrimination (Psychology) / physiology
Fixation, Ocular
Models, Biological
Pattern Recognition, Visual / physiology*
Vision, Binocular / physiology
Vision, Monocular / physiology
Grant Support

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