| Surface edges mitigate the disparity gradient constraint on binocular fusion and visual direction. | |
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MedLine Citation:
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PMID: 22067604 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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One function of the visual system is to combine the different views of the two eyes so that each object appears in a single direction. Using pairs of isolated dots, previous studies have found that binocular fusion gives way to diplopia if the disparity gradient between the dots is steep. This paper evaluates whether fusion is possible in the presence of steep disparity gradients if those gradients occur between the edges of two surfaces, not isolated dots. Two target squares with a steep disparity gradient were presented alone, or were incorporated into separate surfaces - one foreground, the other background. The addition of surfaces, or support texture, restored fusion, overcoming the disparity gradient constraint on fusion. Visual direction was the average of the monocular views in the presence of support texture, indicating that single vision arose from fusion rather than a local suppression of one eye's view. The results suggest a close relationship between the disparity gradient constraint on fusion and the mitigating influence of support texture, because both effects decline dramatically over the same small range of element separations and both effects are reduced by differences in contrast polarity. |
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Authors:
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Phillip Marlow |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-10-31 |
Journal Detail:
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Title: Vision research Volume: - ISSN: 1878-5646 ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-11-9 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0417402 Medline TA: Vision Res Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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School of Psychology, University of New South Wales, Sydney, 2052 NSW, Australia. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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