We then briefly describe the claims made for trichromacy at normal lighting levels in the reviewed article, and subsequently describe why we have concluded that the statistical analysis in support of these claims is incorrect.
Although the demonstration of trichromacy failure appeared robust, the attribution of the failure to rod contributions was generally not acceptable, as rods were believed to not contribute to visual processing at photopic light levels.
Moore, "Oligocone trichromacy
: a rare and unusual cone dysfunction syndrome," British Journal of Ophthalmology, vol.
Berman and Clear have misunderstood Thornton's description of trichromacy, and have incorrectly characterized our use of the term and concept.
Our article was designed to be consistent with Thornton's conceptualization of trichromacy and his prime color theory.
New World primates' vision changed, too, but not to full trichromacy. In most of these animals, some of the females discern reds and yellows from greens, but males don't.
Smith of the University of Stirling in Scotland and several other investigators for an even more realistic test of trichromacy's use.
2 'Normal' in this limited context is a measure of people according to 'trichromacy
' in respect to 'visual pigments'.
(17) A considerable percentage of people with anomalous trichromacy
will report seeing both digits.
Trichromacy of human vision permits the mixing of three spectral primaries to create white light.
Entirely separate from trichromacy, and without reference to it, Berman has argued that the perception of spatial brightness is related to the ratio of the Scotopic (S) to Photopic (P) lumens [Berman and others, 1990].
Human colour vision is characterised by trichromacy
. This refers to our ability to match all lights by a mixture of three other lights (the primaries), provided we are allowed (when needed) to add one of the primaries to the matching light.