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Updated: Oct 16, 2025

Visualizing Visual Adaptation
Published on: April 24, 2017
Brain-computer interface-based assessment of color vision
James J S Norton1,2, Grace F DiRisio3, Jonathan S Carp1,4
1National Center for Adaptive Neurotechnologies, Stratton VA Medical Center, US Department of Veterans Affairs, 113 Holland Ave, Albany, NY 12208, United States of America.
Abstract:
Objective.Present methods for assessing color vision require the person's active participation. Here we describe a brain-computer interface-based method for assessing color vision that does not require the person's participation.Approach.This method uses steady-state visual evoked potentials to identify metamers-two light sources that have different spectral distributions but appear to the person to be the same color.Main results.We demonstrate that: minimization of the visual evoked potential elicited by two flickering light sources identifies the metamer; this approach can distinguish people with color-vision deficits from those with normal color vision; and this metamer-identification process can be automated.Significance.This new method has numerous potential clinical, scientific, and industrial applications.
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