Document Detail


Color matching at high illuminances: photopigment optical density and pupil entry.
MedLine Citation:
PMID:  8478748     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Changes in the effective optical density of the cones are sufficient to explain changes in color matches with retinal illuminance and pupil entry. We performed three experiments. In the first experiment, six observers made color matches under both bleached and unbleached conditions to a series of six standard wavelengths. The effects of bleaching could be modeled by a decrease in optical density of the L and M cone photopigments. Slight spectral shifts in the peak wavelengths of the photopigments were required for different observers. In the second experiment we varied retinal illuminance of the color-matching field from 2.4 to 5.4 log Td for a series of long-wavelength primaries. The shape of the color match versus the intensity function was unchanged by the wavelength composition of the matching field. In the third experiment we measured the change in color match with retinal illuminance for different pupil entry positions. At low luminances there was a marked dependence of the color match on pupil entry positions. At high illuminance there was only a small dependence. The half-bleach illuminance values varied as expected from the Stiles-Crawford I effect. We conclude that for wavelengths > 540 nm, changes in color matches with bleaching and pupil entry can be explained by changes in the effective optical density of the cones.
Authors:
S A Burns; A E Elsner
Related Documents :
2002308 - Discrimination by pigeons of mixture and uniformity in arrays of stimulus elements.
2723558 - A pc-based system for visual evoked potential studies.
16054838 - Flicker-induced color and form: interdependencies and relation to stimulation frequency...
20094568 - Direct-reading color-difference meter based on cube-root color coordinates.
1370398 - Human vep contrast modulation sensitivity: separation of magno- and parvocellular compo...
9753098 - Deficits and recovery of first- and second-order motion perception in patients with uni...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics and image science     Volume:  10     ISSN:  0740-3232     ISO Abbreviation:  J Opt Soc Am A     Publication Date:  1993 Feb 
Date Detail:
Created Date:  1993-05-24     Completed Date:  1993-05-24     Revised Date:  2014-09-15    
Medline Journal Info:
Nlm Unique ID:  8402086     Medline TA:  J Opt Soc Am A     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  221-30     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Color Perception / physiology*
Female
Humans
Light*
Male
Pupil / physiology*
Retina / physiology
Retinal Pigments / physiology*
Grant Support
ID/Acronym/Agency:
R01 EY004395/EY/NEI NIH HHS; R01 EY004395-19/EY/NEI NIH HHS; R01-EY04395/EY/NEI NIH HHS
Chemical
Reg. No./Substance:
0/Retinal Pigments
Comments/Corrections

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


Previous Document:  Experimental determination of the chromatic difference of magnification of the human eye and the loc...
Next Document:  Theory of wavelength discrimination in tritanopia.