Visual discrimination: Seeing the third quality of light

Curr Biol. 1999 Jul 15;9(14):R535-7. doi: 10.1016/s0960-9822(99)80330-3.


Objects can differ in brightness and colour. At least that is what our own visual system tells us. It now seems that stomatopod shrimps, and possibly also cephalopod molluscs, can see the direction of the electric vector of light, in much the same way we see colour.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • Behavior, Animal / physiology
  • Color Perception / physiology
  • Contrast Sensitivity / physiology*
  • Decapoda / physiology
  • Electricity
  • Light*
  • Photoreceptor Cells, Invertebrate / physiology
  • Vision, Ocular / physiology*
  • Visual Perception / physiology*