An<unk>  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<unk>  to "open" the eye. This can be either voluntarily or involuntarily.  The human<unk>  features a row of eyelashes which serve to heighten the protection of the eye from dust and foreign debris. "Palpebral" (and "blepharo") means relating to the<unk> s.
Eyelid
Olea
Orbit 
Lacrimal bone
Audios
Optic tract
Iris 
Canthus 