Droopy eyelid. There are no exercises. Your best bet would be to have your eyes evaluated by a board certified facial plastic surgeon.
Congenital/acquired. None that i know of. If your droopy eyelid is congenital, it will not get better, and ocassionally surgery is needed. If its is acquired, it may get better with time, but still may require surgery if symptomatically bothering you. More importantly is what is the cause, because the treatment depends on the underlying cause. If this is new, an exam is essential for proper diagnosis.