| Scale-dependent loss of global form perception in strabismic amblyopia. | |
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MedLine Citation:
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PMID: 21047757 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Amblyopic humans are known to have a range of spatial vision abnormalities. Prior studies have documented amblyopic deficits in global form perception but have typically used only one set of stimulus parameters. Our aim in this study was to examine the extent and nature of global form perception deficits in strabismic amblyopia using a range of spatial scales and pattern types. Glass patterns are random dot stimuli in which the local orientations of paired dots must be integrated over space to yield a global form percept. We measured coherence thresholds for discrimination of pattern structure in translational (linear) and concentric Glass patterns at three spatial scales in two control and six amblyopic observers. We found that sensitivity to Glass patterns depended on both spatial scale and pattern type in all observers. Participants with a history of abnormal early visual experience showed greater interocular threshold difference when the discrimination was based on translational patterns than when it was based on concentric patterns, and the degree of amblyopic loss was greatest at fine spatial scale. Our results show that the nature and extent of global form vision deficits vary substantially with stimulus parameters and are greatest at fine spatial scales. |
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Authors:
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Elizabeth M Rislove; Elaine C Hall; Kara A Stavros; Lynne Kiorpes |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2010-10-22 |
Journal Detail:
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Title: Journal of vision Volume: 10 ISSN: 1534-7362 ISO Abbreviation: J Vis Publication Date: 2010 |
Date Detail:
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Created Date: 2010-11-04 Completed Date: 2011-02-24 Revised Date: 2011-12-01 |
Medline Journal Info:
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Nlm Unique ID: 101147197 Medline TA: J Vis Country: United States |
Other Details:
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Languages: eng Pagination: 25 Citation Subset: IM |
Affiliation:
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School of Optometry, University of California, Berkeley, Berkeley, CA, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Amblyopia / physiopathology* Contrast Sensitivity / physiology Discrimination (Psychology) / physiology Form Perception / physiology* Humans Middle Aged Photic Stimulation / methods Sensory Thresholds / physiology Strabismus / physiopathology* Visual Pathways / physiology* Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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EY05864/EY/NEI NIH HHS; R01 EY005864-17S1/EY/NEI NIH HHS; R01 EY005864-24/EY/NEI NIH HHS; R01 EY005864-25/EY/NEI NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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