protanopic

/ˌproʊtəˈnɑpɪk/
adjective
  1. Having a form of color blindness in which the eye cannot perceive red light.
    • A protanopic person may confuse red and green traffic lights.
    • The test revealed that he was protanopic, unable to see the red numbers in the pattern.
    • Protanopic individuals often rely on brightness rather than color to distinguish objects.
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