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Color-vision mechanisms in the peripheral retinas of normal and dichromatic observers.
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MedLine Citation:
PMID:  4540057     Owner:  NLM     Status:  MEDLINE    
It is possible that so-called normal trichromatic vision occurs only between the central blue-blind fixation area and about 30 degrees peripherally. Beyond about 30 degrees vision has been alleged to become dichromatic (red-green blind), and beyond about 60 degrees , monochromatic. Hence every form of color blindness may characterize various zones of the normal retina. We have studied mechanisms of peripheral color vision, mainly by measuring the spectral sensitivities of the blue-, green-, and red-sensitive systems, isolated by differential color adaptation. In normal observers the sensitivity of the blue-mechanism falls off about 2 log units by 80 degrees out. The green- and red-sensitive systems decline only about 0.7 log unit over the same range. Protanopes, deuteranopes, and tritanopes exhibit comparable changes. We have not found any color mechanism present centrally to be wholly lost peripherally. Nor, for dichromats, have we found any mechanism missing centrally to be present peripherally. Whatever evidences of peripheral color blindness have been observed appear to involve other mechanisms than failure of receptors, probably including some fusion of neural pathways from receptors to centers.
B R Wooten; G Wald
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of general physiology     Volume:  61     ISSN:  0022-1295     ISO Abbreviation:  J. Gen. Physiol.     Publication Date:  1973 Feb 
Date Detail:
Created Date:  1973-04-23     Completed Date:  1973-04-23     Revised Date:  2010-09-13    
Medline Journal Info:
Nlm Unique ID:  2985110R     Medline TA:  J Gen Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  125-45     Citation Subset:  IM    
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MeSH Terms
Color Perception*
Color Perception Tests
Color Vision Defects / physiopathology*
Retina / physiopathology*

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

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Journal Information
Journal ID (nlm-ta): J Gen Physiol
ISSN: 0022-1295
ISSN: 1540-7748
Publisher: The Rockefeller University Press
Article Information
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Copyright © 1973 by The Rockefeller University Press
Received Day: 13 Month: 7 Year: 1972
Print publication date: Day: 1 Month: 2 Year: 1973
Volume: 61 Issue: 2
First Page: 125 Last Page: 145
ID: 2203465
PubMed Id: 4540057

Color-Vision Mechanisms in the Peripheral Retinas of Normal and Dichromatic Observers
B. R. Wooten
George Wald
From the Biological Laboratories, Harvard University, Cambridge, Massachusetts 02138.
Dr. Wooten's present address is Department of Psychology, Brandeis University, Waltham, Massachusetts 02154.

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