Postreceptoral chromatic-adaptation mechanisms in the red-green and blue-yellow systems using simple reaction times

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
J M Medina, José A Díaz

Abstract

Simple visual-reaction times (VRT) were measured for a variety of stimuli selected along red-green (L-M axis) and blue-yellow [S-(L + M) axis] directions in the isoluminant plane under different adaptation stimuli. Data were plotted in terms of the RMS cone contrast in contrast-threshold units. For each opponent system, a modified Piéron function was fitted in each experimental configuration and on all adaptation stimuli. A single function did not account for all the data, confirming the existence of separate postreceptoral adaptation mechanisms in each opponent system under suprathreshold conditions. The analysis of the VRT-hazard functions suggested that both color-opponent mechanisms present a well-defined, transient-sustained structure at marked suprathreshold conditions. The influence of signal polarity and chromatic adaptation on each color axis proves the existence of asymmetries in the integrated hazard functions, suggesting separate detection mechanisms for each pole (red, green, blue, and yellow detectors).

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Citations

Oct 5, 2010·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·José M Medina, José A Díaz
Apr 12, 2016·Frontiers in Psychology·Marcelo F CostaDora F Ventura
Jul 3, 2010·Visual Neuroscience·Beatriz M O'DonellElisa M Colombo
Feb 15, 2012·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·José M Medina, José A Díaz
Apr 4, 2014·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Andrew J ZeleDingcai Cao
Apr 30, 2016·Perception·Beatriz M O'Donell, Elisa M Colombo

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