Document Detail


Perceived shifts in saturation and hue of chromatic stimuli in the near peripheral retina.
MedLine Citation:
PMID:  17912307     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Using an asymmetric color matching technique, we measured the perceived changes that occur in the saturation and hue of colored stimuli at different eccentricities within the central 25 degrees of the human retina in nine color-normal subjects. A cone-opponent-based vector model was used to compute the activity of the L-M and S-(L+M) channels. The results show that a large proportion of the shifts in saturation and hue that occur with increasing retinal eccentricity are mirrored by decreased activity of the L-M channel. In comparison, the contribution of the S cone-opponent system undergoes relatively little change within the central 20 degrees . In addition, we also found that changes in saturation and hue are different from each other in terms of their variation across color space and their variation with stimulus size. Our findings suggest that perceived shifts in saturation and hue are mediated largely via the reduction in activation of the L-M cone-opponent channel but that saturation and hue might be subject to different retinal and/or cortical influences that contribute to their differing size dependencies in the peripheral retina.
Authors:
Declan J McKeefry; Ian J Murray; Neil R A Parry
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics, image science, and vision     Volume:  24     ISSN:  1084-7529     ISO Abbreviation:  J Opt Soc Am A Opt Image Sci Vis     Publication Date:  2007 Oct 
Date Detail:
Created Date:  2007-10-03     Completed Date:  2008-01-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9800943     Medline TA:  J Opt Soc Am A Opt Image Sci Vis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3168-79     Citation Subset:  IM    
Affiliation:
Vision Science Research Group, School of Life Sciences, University of Bradford, UK. d.mckeefry@bradford.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Adult
Color*
Color Perception / physiology*
Differential Threshold / physiology*
Female
Humans
Male
Retina / physiology*

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


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