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color vision

  1. A

    Historical / Evolutionary Changes In Human Visual Perception?

    Hi! Im reading the book "The Occult" by Collin Wilson and, even if im just begining to read it, theres a question that comes to mind. There is a passage where he says the 2000 years ago, man was nearly color blind. He cites some examples. If you want them I can write down the text. My...
    • Anonymous
    • Thread
    • color blindness color vision colour blindness colour vision visual perception
    • Replies: 24
    • Forum: The Human Condition
  2. M

    Colour Vision & Colour Blindness

    i know that people have red, yellow. blue?, (yes and octorine) receptors why is it?. when ive watched friends tv, they have and watch progs (higher/stronger than i can cope with?). cos i have always ask, (the friends,) to tone the red down. so, are people born with with the same...
    • Melf
    • Thread
    • color blindness color vision colour blindness colour vision
    • Replies: 16
    • Forum: Medical Forteana
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