Document Detail


Lateral interactions in amblyopia.
MedLine Citation:
PMID:  12367746     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We studied lateral neural interactions in strabismic (n=6) and anisometropic amblyopes (n=3) by measuring reductions in the perceived contrast of a foveally viewed Gabor centred in a horizontal array of closely neighboring Gabors. Strabismic amblyopes, but not anisometropic amblyopes, failed to show the reduction in perceived contrast typical of normal vision [J. Opt. Soc. Amer. A 15 (1998) 1733] when lateral contrast information is available at the same orientation and spatial frequency. The strabismic amblyopes also severely misperceive the regularity of the array of Gabors flanking the test stimulus. A normal eye could model the anomalous contrast perception of the amblyopic eye, by adding an equivalent amount of spatial distortion to the stimulus. The relationship between the observed anomalies for local contrast gain control and positional sensitivity is discussed.
Authors:
Dave Ellemberg; Robert F Hess; A Serge Arsenault
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Vision research     Volume:  42     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  2002 Sep 
Date Detail:
Created Date:  2002-10-07     Completed Date:  2002-12-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  2471-8     Citation Subset:  IM    
Affiliation:
Department of Ophthalmology, McGill Vision Research Unit, McGill University, 687 Pine Avenue W (H4, 14), Montreal, H3A 1A1, Que., Canada.
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MeSH Terms
Descriptor/Qualifier:
Adult
Amblyopia / psychology*
Anisometropia / psychology
Contrast Sensitivity*
Humans
Middle Aged
Strabismus / psychology
Vision Tests
Visual Acuity

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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