Topic summary
Eyelids
Extracted from the Wikipedia article Eyelid.
Eyelids can be found in other animals, some of which may have a third eyelid, or nictitating membrane. A vestige of this in humans survives as the plica semilunaris.
Topic summary
Extracted from the Wikipedia article Eyelid.
Eyelids can be found in other animals, some of which may have a third eyelid, or nictitating membrane. A vestige of this in humans survives as the plica semilunaris.