The facial nerve is the nerve that moves facial expressions.
Facial Paralysis can be caused by a variety of factors, but it causes facial asymmetry, resulting in a drastic change in facial appearance.
The eyelids normally protect the eyes, but in Facial Paralysis the muscles that move the eyelids are paralyzed, causing the lower eyelid to droop and the upper eyelid to lift, resulting in a dry eye.
The appearance and dryness of Facial Paralysis can be significantly improved with surgery.