Document Detail

Variations in photoreceptor directionally across the central retina.
MedLine Citation:
PMID:  9291599     Owner:  NLM     Status:  MEDLINE    
Cones show a differential sensitivity to light coming from different portions of the pupil, typically being most sensitive to light from the center of the pupil. We measured the directional properties of the cones across the central 6 deg of the retina, using an optical imaging technique. We find that the cones in the center of the fovea have the broadest tuning. The width of the angular tuning changes rapidly from 0 deg to 1 deg retinal eccentricity, with cones at 1 deg being much more narrowly tuned that the cones in the center of the fovea. Directional tuning of the cones remains relatively constant from 1 deg to 3 deg retinal eccentricity. Receptoral disarray contributes minimally to the measured directional properties of the foveal cones, and there is no evidence of asymmetry between horizontal and vertical retinal locations. There are only small differences among the five subjects in the change in angular tuning of the cones with retinal location. We find that at the foveal center the directional tuning of the cones is limited by the diameter of the cone apertures.
S A Burns; S Wu; J C He; A E Elsner
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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, image science, and vision     Volume:  14     ISSN:  1084-7529     ISO Abbreviation:  J Opt Soc Am A Opt Image Sci Vis     Publication Date:  1997 Sep 
Date Detail:
Created Date:  1997-10-09     Completed Date:  1997-10-09     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:  2033-40     Citation Subset:  IM    
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MeSH Terms
Fovea Centralis / physiology
Middle Aged
Optics and Photonics
Pupil / physiology,  radiation effects
Retina / physiology*,  radiation effects
Retinal Cone Photoreceptor Cells / physiology*
Grant Support
EY-04395/EY/NEI NIH HHS; EY-06629/EY/NEI NIH HHS; EY-07624/EY/NEI NIH HHS; R01 EY004395/EY/NEI NIH HHS; R01 EY004395-19/EY/NEI NIH HHS

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