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| Research article summary (published 30 Dec 2002): |
Short-wavelength acuity: blue-yellow and achromatic resolution loss with age.
Full Abstract
Previous studies have indicated that peripheral resolution for achromatic gratings is sampling limited and directly related to the density of the underlying midget ganglion cell population. Previous studies by the authors have shown that peripheral resolution for blue-cone isolating gratings is also sampling limited, is robust to optical defocus and short-wavelength attenuation, and yields estimates of sampling density which correspond closely with the density of small bistratified ganglion cells. We measured peripheral resolution in a group of normal subjects ranging in age from 12 to 72 years, using both achromatic and blue-cone isolating gratings, to determine how performance (and hence ganglion cell density) changed with age for both systems. Resolution was higher for achromatic than blue-yellow gratings and performance was flat for both until the fifth decade. After this, performance declined for both at a rate of approximately 14%/decade with no significant difference between the two rates of decline. Individual measurements of lens density were not correlated with short-wavelength sensitive resolution performance in the older subjects, further indicating that the decline in resolution was not attributable to pre-retinal absorption.Copyright 2002 Elsevier Science Ltd.
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Author information
Author/s: Zlatkova, Margarita B (MB); Coulter, Esther (E); Anderson, Roger S (RS);
Affiliation: Vision Science Research Group, School of Biomedical Sciences, University of Ulster at Coleraine, Co Londonderry BT52 1SA, UK.
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Vision research (Vision Res), published in England. (Language: eng)
Reference: 2003-Jan; vol 43 (issue 1) : pp 109-15
Dates: Created 2002/12/30; Completed 2003/04/07; Revised 2006/11/15;
PMID: 12505610, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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