Assertion: eyelid's function | /r/HasProperty | to remove debris
Facets:
value: to prevent water
type: PURPOSE
Source sentences:
text: As the nictitating membrane can cover the entire surface of the eyes, its main function is to remove debris that gets into the eyes and to distribute tears to keep the cornea moist.
text: The main function is to prevent sweat, water, and other debris falling into the eye, but they are also important to human communication and facial expressions.