Sea urchins do not have eyes, yet appear to be able to see where they are going. One posible answer: they may use the entire surface of their bodies as a compound eye.
posted by Artw on Feb 7, 2010 - 31 comments

A fish with forward facing eyes has been discovered in Indonesia. [more inside]
posted by chuckdarwin on Apr 3, 2008 - 47 comments

Dr Hugo's Museum of the Mind - Synaesthesia
posted by Gyan on Jan 20, 2005 - 22 comments

Mutants with 4-colour vision! And you thought the magnetic kid was just the beginning...
posted by hobbes on Nov 28, 2000 - 22 comments