According to Wikipedia, an eyelash grows in one layer on the edge of the eyelids and protects the eye from debris, dust and small particles. The eyelashes perform some of the same functions as whiskers do on a cat or a mouse in the sense that they are sensitive to being touched, thus providing a warning that an object (such as a bug) is near the eye.
But lashes are not found only in humans.
There are some mammals with remarkably long and thick eyelashes - camels, horses, cows and some species of birds are just a few on the list.
Check out these gorgeous animals with beautiful eyelashes.