Abstract

A large-field substitution procedure for making Rayleigh màtches was used to study the color matches of eight red-green dichromats and two extreme anomalous trichromats. Matches were made under three experimental conditions: (1) During the cone plateau period after a bleach; (2) after the rods had recovered from the bleach; and (3) on a blue background. Under conditions (1) and (3) rods were desensitized and appear to be unable to contribute to the color match. Seven of eight dichromats were still able to make unique matches with the rods desensitized. The matches of six of these seven dichromats were consistent with predicted matches for simple protanomalous and simple deuteranomalous trichromats. Matches made under condition (2) were typically more nearly consistent with matches predicted for the rods and the remaining normal cone mechanism, but there were also some individual differences in these matches. The matches of the two extreme anomalous trichromats were similar to the matches of the dichroats.

© 1980 Optical Society of America

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