Light enters the eye through the cornea . There is also the eyelid and eyelashes . The eyelid acts as a window shade, protecting the eye. It can close, open, and close partially as in a squint to limit the amount of light reaching the eye. The eyelashes are a row of hairs along the front edge of the eyelid.
Eyelashes keep dust and dirt from getting into the eyes.
Look at your own eyes in the mirror. Look closely at a friend's eyes as the two of you talk about the parts of the eye, and how the eye works. Never put anything in or near your eyes, or into the eyes of a friend or family member . We use our eyes more than any other sense to find out things about the world. Put your finger in her eye.