Document Detail

The spatial resolution capacity of human foveal retina.
MedLine Citation:
PMID:  2617858     Owner:  NLM     Status:  MEDLINE    
An image on the retina of a human eye enters the visual system through an array of photoreceptors that sets the boundaries on the spatial detail available for neural representation. In order to investigate the extent to which the input spatial detail is preserved by the human neural system, we compare the anatomical spatial limits as determined by the Nyquist frequency, the highest spatial frequency reconstructable from the cone array, and measures of human acuity, the minimum angle resolvable. We find that the anatomical Nyquist limits determined along the temporal horizontal meridian of a well-studied human retina (Curcio, Sloan, Packer, Hendrickson & Kalina, 1987b) offer a reasonable prediction of human acuity within the retinal region extending from slightly off the exact foveal center to about 2.0 deg of retinal eccentricity. However, we find a narrow peak of anatomical resolution at the foveal center where the acuity appears to be overestimated by cone spacing.
J Hirsch; C A Curcio
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Vision research     Volume:  29     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1989  
Date Detail:
Created Date:  1990-03-02     Completed Date:  1990-03-02     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1095-101     Citation Subset:  IM    
Yale University School of Medicine, Department of Ophthalmology and Visual Science, New Haven, CT 06510.
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MeSH Terms
Cell Count
Fovea Centralis
Photoreceptor Cells / cytology
Retina / cytology*,  physiology
Visual Acuity*

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

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