Document Detail

Color contrast perimetry. The spatial distribution of color defects in optic nerve and retinal diseases.
MedLine Citation:
PMID:  4034172     Owner:  NLM     Status:  MEDLINE    
Color contrast perimetry was used to evaluate central visual field defects in a group of 28 patients with visual loss resulting from optic nerve or retinal diseases. Kinetic perimetry was performed using colored test objects of constant luminance, equated to a white surround of 10 ft lamberts. Colored test objects were varied in size and in extent of color saturation. Test object color saturation was varied from a white that matched the color and luminance of the adapting background toward either the blue or the red color maxima of a video tangent screen. All central visual field defects that were demonstrable by luminance contrast perimetry were also detected by color contrast testing, and no defects were found for color contrast detection that could not also be demonstrated by conventional luminance increment perimetry. Retinal diseases usually produced scotomas for both color and luminance contrast detection, while optic nerve disorders tended to produce global depressions of both color and luminance contrast sensitivity across the entire visual field in addition to scotomas. There was no systematic difference in visual field defects for either class of disease when comparing color contrast in the blue (tritan) versus the red (protan) axes of color space. The apparent tritan or protan/deutan axes of color confusion found by hue discrimination testing in acquired dyschromatopsias may be determined by the relative spatial distribution of defects in the central visual field rather than by selective impairment of neural mechanisms for color or luminance information processing.
W M Hart; R M Burde
Publication Detail:
Type:  Case Reports; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Ophthalmology     Volume:  92     ISSN:  0161-6420     ISO Abbreviation:  Ophthalmology     Publication Date:  1985 Jun 
Date Detail:
Created Date:  1985-10-03     Completed Date:  1985-10-03     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7802443     Medline TA:  Ophthalmology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  768-76     Citation Subset:  IM    
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MeSH Terms
Color Perception*
Middle Aged
Optic Nerve Diseases / complications,  physiopathology*
Perimetry / methods*
Retinal Diseases / complications,  physiopathology*
Scotoma / diagnosis,  etiology
Grant Support

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

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