PMID: 3750866Jan 1, 1986Paper

Rod influence on cone flicker detection: variation with retinal eccentricity

Vision Research
K R Alexander, G A Fishman

Abstract

Previous studies have shown that cone flicker thresholds are influenced by the adaptation state of the rod system. We have examined how the properties of this rod-cone flicker interaction differ with retinal eccentricity. The threshold for detecting 25 Hz flicker was measured in the dark-adapted eye, against a rod-saturating Ganzfeld background and following a Ganzfeld bleach. The magnitude of the interaction, defined as the difference between light- and dark-adapted flicker thresholds, covaries with changes in rod absolute threshold across the visual field. At a given eccentricity, the magnitude of the interaction is constant for test diameters ranging from 7' to 1.7 degrees, indicating that variations in magnitude with eccentricity do not result from changes in spatial summation properties. The measurement of cone flicker thresholds during bleaching recovery provides evidence that variations in the magnitude of the rod-cone flicker interaction with retinal eccentricity may result from differences in the channel capacity of the pathway carrying the threshold-elevating signal from rods.

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Citations

Aug 1, 1990·Documenta Ophthalmologica. Advances in Ophthalmology·E Günther, E Zrenner
Jan 1, 1990·Vision Research·N S PeacheyD J Derlacki
Jan 1, 1993·Vision Research·B Stabell, U Stabell
Oct 1, 1987·The British Journal of Ophthalmology·T Schneider, E Zrenner
Aug 3, 2001·Vision Research·A J Anderson, A J Vingrys
Aug 1, 1997·Vision Research·B Sadowski, E Zrenner
May 9, 2002·Vision Research·Andrew John Anderson, Algis Jonas Vingrys
Jun 15, 1988·American Journal of Ophthalmology·G B ArdenA C Bird
Aug 6, 1998·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·A EisnerJ A Middleton

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