Geckos have exceptionally well developed sight which they depend heavily upon for their very survival. Did you know that some nocturnal geckos even have the ability to see color in dim light?
Geckos from the family Gekkonidae (typical geckos) have no functional eyelids! Instead of eyelids, they actually have fused eyelids and a transparent membrane (also referred to as a spectacle, brille or scale) that permanently covers and protects the eye. Any dust specks that stick to this membrane can simply be licked off by using their tongue!
Geckos from the family Eublepharidae have fully functional eyelids, much like you and I. Some people will refer to these geckos as eyelid or eublepharine geckos and includes the common leopard gecko, fat-tail gecko, banded geckos and more.
Click on an image to see each different gecko eye in even more amazing detail!
By Candace, SaveTheReptiles.com