Most species of geckos throughout the world do not have eyelids. There are more than 1500 species of these. However, there are at least 18 species of geckos that do have eyelids, and these are also found around the earth.
The vast majority of geckos do not have eyelids and therefore are unable to blink. However, they do have a clear film over their eye, that acts as a kind of permanent unmovable barrier. This transparent film is called a spectacle.
Geckos have spectacular long tongues, that are really moist and sticky. The regularly lick their own eyes, and this keeps their eyes moist. In this way their tongue acts in the same ways as a human’s eyelid.
Most geckos are native to hot countries also, and this licking of their eyes also helps in keeping the eyes cool.
Having no eyelids causes quite a serious problem, in that geckos are not able to close their eyes. This problem is added to by the fact that the majority of geckos are nocturnal: they hunt at night, and sleep during the day.
Credit : Mercury Pets
Picture Credit : Google
