Color-vision and color blindness, a practical manual for railroad surgeons (1920)
Jennings, John Ellis · Philadelphia F.A. Davis · leaf 32
the light, and,having covered one eye, he rests liis chin on the supportand fixes the uncovered eye on the white dot in thecentre of the semicircle. The test-object, a one-half-inchsquare of white or colored paper fastened in the sliding PHYSIOLOGICAL ANATOMY OF THE KETIXA. 15 earlier, is then… … Blue Yellow ir^^ Red Green Fig. 5.—Diagram of the Normal Fielb of Vision for White,Blue, Yellow, Red, and Green. The outer, continuous line indicates the limit of the field for white, and the broken linesindicate the limits of the color-fields. proceed as before. In tliis manner the field of vision…
Color-blindness · Eye
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