Drooping of one or both the eyelids is known as ptosis. In ptosis (sleepy eyes) the upper eyelid covers more than 1 to 2 mm of cornea. When it is severe it can affect the field of vision. Ptosis (senile ptosis) can be as a result of ageing.
Ptosis correction can be done under local or general anesthesia. It is corrected by tightening a muscle (levator palpebri superioris) the upper eyelid. In cases where the levator muscles are rudimentary one may have to resort to simple sling procedure where the upper lid is suspended from the brow.