| Latin = palpebra inferior, palpebra superior | GraySubject = 227 | GrayPage = 1025 | Image = Eyelashes.jpg | Caption = Upper eyelid | Image2 = | Caption2 = | Precursor = | System = | Artery = lacrimal, superior palpebral, inferior palpebral | Vein = | Nerve = ''upper:'' infratrochlear, supratrochlear, supraorbital, lacrimal ''lower:'' infratrochlear, branches of infraorbital | Lymph = | MeshName = Eyelids | MeshNumber = A01.456.505.420.504 | DorlandsPre = | DorlandsSuf = | }}An eyelid is a thin fold of skin that covers and protects an eye. With the exception of the prepuce and the labia minora, it has the thinnest skin of the whole body. The levator palpebrae superioris muscle retracts the eyelid to "open" the eye. This can be either voluntarily or involuntarily. The human eyelid features a row of eyelashes which serve to heighten the protection of the eye fro