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    • Ishihara test image seen by those with differing colour vision.
    Rights: Eddau Published 1 February 2011 Size: 380 KB Referencing Hub media

    Colour blindness is the decreased ability to perceive differences between some colours. It usually has a genetic basis and affects men more than women.

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      ARTICLE

      Sight

      The human eye is a sense organ adapted to allow vision by reacting to light. The eye contains structures that allow it to perceive light, movement and colour differences. Eye structure ...

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