Document Detail

Perceived length in the central visual field: evidence for visual field asymmetries.
MedLine Citation:
PMID:  11403795     Owner:  NLM     Status:  MEDLINE    
Visual performance for judging the length of a simultaneously presented pair of radial lines, reciprocally opposed by 180 degrees at a central fixation point, was assessed for 24 radial positions of test lines, for three viewing conditions (binocular, left and right monocular) and five different standard line sizes (1.43-7.13 degrees ). Generally, the results showed underestimation of the test line. Furthermore, clear visual field asymmetries were observed between the upper versus lower visual fields and the left versus right visual fields with greater underestimation for test lines presented in the lower and right visual fields. Also, asymmetries tended to be strongest along the 30 and 150 degrees radial orientations. Fourier analysis indicated that these asymmetries are mainly described by summing up the f0, f1, f2 and f5 components.
S S Fukusima; J Faubert
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Vision research     Volume:  41     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  2001 Jul 
Date Detail:
Created Date:  2001-06-13     Completed Date:  2001-08-09     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  2119-26     Citation Subset:  IM    
Department of Psychology and Education/FFCLRP, University of São Paulo, 014040-901, Ribeirão Preto, São Paulo, Brazil.
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MeSH Terms
Analysis of Variance
Fourier Analysis
Orientation / physiology
Size Perception / physiology*
Vision, Binocular / physiology
Vision, Monocular / physiology
Visual Fields / physiology*

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