Document Detail

Chromatic contrast sensitivity: the role of absolute threshold and gain constant in differences between the fovea and the periphery.
MedLine Citation:
PMID:  10680625     Owner:  NLM     Status:  MEDLINE    
A model of foveal achromatic and chromatic sensitivity [Vision Res. 36, 1597 (1996)] was extended to the peripheral visual field. Threshold-versus-illuminance functions were analyzed to determine effects of eccentricity on absolute thresholds and gain constants of chromatic and luminance mechanisms. The resulting peripheral model successfully predicted peripheral contrast sensitivity as a function of wavelength, for both white and 500-nm backgrounds. We conclude that the short-wavelength-sensitive cone opponent mechanism may mediate thresholds in Sloan's notch in the normal periphery and that interpretation of reduced chromatic sensitivity in the periphery requires an explicit model of how eccentricity affects both the gain constant and the absolute threshold.
P M Pearson; W H Swanson
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics, image science, and vision     Volume:  17     ISSN:  1084-7529     ISO Abbreviation:  J Opt Soc Am A Opt Image Sci Vis     Publication Date:  2000 Feb 
Date Detail:
Created Date:  2000-03-02     Completed Date:  2000-03-02     Revised Date:  2014-09-15    
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:  232-43     Citation Subset:  IM    
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MeSH Terms
Color Perception / physiology*
Contrast Sensitivity / physiology*
Fovea Centralis / physiology
Models, Biological*
Sensory Thresholds / physiology
Grant Support

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