~ RHODOPE    myth> A WINTRY REGION OF THE MOUNTAINS
                   WHERE ORPHEUS RETIRED
~ RHODOPSIN  id+ |  RED or PURPLE |
              from gr RHODON
                      OPSIS = VISION
  it denotes CAPACITY FOR RED VISION
  med> A PHOTOSENSITIVE PROTEIN OF ROD
       RETINAL CELLS AND
  THE BASIS FOR DAY LIGHT COLOR VISION
  WHEN THE PIGMENT IS BLEACHED BY LIGHT
  IT STIMULATES RETINAL NERVES
         

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