Flashing color and the electroencephalogram in color‐deficient subjects

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Abstract
Eleven USAF [United States Air Force] males were selected on the basis of abnormal color vision and their color vision defects were identified. Photic flashes controlled by colored filters were used to evoke responses at the occiput. Group and subgroup averaging techniques were used to minimize individual subject variability and to find the average waveform after each color in both the eyes open and eyes closed mode. The waveform previously seen in normals after red flash was not seen after red stimulus in these color-vision deficient groups. A double-peaked waveform was instead seen after blue flash in the protanomalous subgroup and after green flash in the single protanope. The 4 deutans failed to generate a double-peaked positive wave after any color or white.

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