抄録
It is no doubt that there exists close relations between light and color vision, and that the mechanism of defective color vision as well as normal color vision should be explored keeping this in mind. Previous studies, however, have based too much upon the concept of trichromatic vision. The present authors maintain that normal and anomalous color vision should be reconsidered from the observations on natural color sensations. The author's proposal is that the color vision is induced not by three primary colors but by five primaries, i. e. red, yellow, green, blue and purple, and for the further detailed analysis ten primaries should be considered, i. e. red, yellowish red, yellow, greenish yellow, green, bluish green, blue, bluish purple, purple and purplish red.
The above arguments are based upon many experiments having been done by the author, on the subject's ability of discrimination of ten colored lights of different spectral composition, in combinations of low or high saturation and dim or bright luminance, and also on the recovery of hue shift after adaptation to intense white light
