The light-sensitive tissue of birds’ eyes is not supplied with oxygen by blood vessels – instead, it powers itself with a ...

To begin understanding glaucoma, you must first know a few basic facts about the eye and how it works. With this knowledge, you will be better prepared to discuss your condition and treatment with ...

Professor Lars Schmitz joins WIRED to guide us through a giant tree of life mapping the evolution of eyes in the animal kingdom: how they work, why they've taken the form they have, and the ...