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

Bernt Aune's corneas are 123 years old, which possibly makes them the oldest living human tissue on record. [more inside]
posted by andeles on Oct 30, 2008 - 27 comments

Eyescapes by Rankin [nsfw]. [more inside]
posted by nickyskye on Feb 3, 2008 - 33 comments

Scientists in the USA have discovered [NYTimes] a new cell in the eye responsible for resetting the biological clock. Its being called "heretical".. Not every day, Dr. Provencio said, do scientists find a new body function.
posted by stbalbach on Feb 8, 2002 - 3 comments