What is the function of the eyelids?
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THE MAIN ROLE OF THE EYELIDS IS TO PROTECT THE EYE.
WHEN WE SLEEP, THE EYELIDS DON'T SIMPLY BLOCK OUT LIGHT, THEY KEEP THE CORNEA FROM DRYING OUT.
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An eyelid is a thin fold of skin that covers and protects an eye. The levator palpebrae superioris muscle retracts the eyelid, exposing the cornea to the outside, giving vision. ... They keep the eyes from drying out when asleep. Moreover, the blink reflex protects the eye from foreign bodies.
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