The Pickford-Nicolson anomaloscope for testing and measuring colour sensitivity and colour blindness, and other tests and experiments.
D003116:Color; D003119:Color Perception Tests / Q000600:supply & distribution*; D003117:Color Vision Defects; D004864:Equipment and Supplies; D005079:Excipients; D006801:Humans
D005079:Excipients
COLOR PERCEPTION TESTS/equipment and supplies