Extraocular vision

  • IASbaba
  • January 4, 2020
  • 0
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Extraocular vision

Part of: GS Prelims

In News

  • The ability to see without eyes is known as extraocular vision
  • Latest research shows that species of brittle stars, which are relatives of starfish, can see even though it does not have eyes. It becomes only the second creature, after a sea urchin species, known to have this ability
  • The brittle star sees with the help of light-sensing cells that cover its entire body. These light-sensing cells give the brittle star visual stimuli, allowing it to recognise coarse structures such as rocks

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