Color-vision and color blindness, a practical manual for railroad surgeons (1920)
Jennings, John Ellis · Philadelphia F.A. Davis · leaf 51
same way,or, in other words, are to them, in fact, exactly thesame color. In cases where they succeed in distinguish-ing them, it is by the aid of the intensity of the light;but the opposite of what occurs in the case of the red-blind. A green tint, which to the green-blind mustappear exactly like… … The two primitive colors of the violet-blind are then redand green. The red is a purer red color (not yellowish)than normal red, but still less saturated; the more it in-clines toward orange the more strongly luminous it is,but is at the same time less saturated, more whitish.The yellow is, as it…
Color-blindness · Eye
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