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What limits detection and resolution of short-wavelength sinusoidal gratings across the retina?

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Anderson, Roger, Zlatkova, MB and Demirel, S (2002) What limits detection and resolution of short-wavelength sinusoidal gratings across the retina? VISION RESEARCH, 42 (8). pp. 981-990. [Journal article]

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Abstract

Peripheral resolution acuity for achromatic gratings is known to be limited by the density Of the underlying ganglion cell sampling array. After confirming isolation of the short-wavelength Sensitive (SWS) System using chromatic adaptation methods. we wished to determine if resolution is limited by blue/yellow ganglion cell sampling (evidenced by a superiority of detection over resolution acuity and the perception of aliasing) and thus directly related to SWS-driven ganglion cell density. We measured detection and resolution acuity between 0degrees and 35degrees, using blue sinusoidal gratings superimposed on a yellow adapting background which ranged in intensity from 2.5 to 4.7 log Trolands. At all locations, a break could be observed in the acuity, vs. illumination curves followed by a plateau. Detection and resolution acuity were the same for low background intensities, but resolution acuity was lower than detection at higher intensities, accompanied by observations of chromatic aliasing. SWS resolution is sampling-limited across the retina and agrees well with predicted performance based on anatomical estimates of small bistratified ganglion cell density. (C) 2002 Elsevier Science Ltd. All rights reserved.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Vision
ID Code:3956
Deposited By:Dr Margarita Vidinova
Deposited On:09 Feb 2010 09:36
Last Modified:04 Aug 2011 09:51

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