There are two 'main' surgeries that may possibly be performed on the upper eyelid.
This section addresses Ptosis  which is the medical term for drooping of the
upper eyelid; it may possibly affect one or both eyes.

The other surgery of the upper eyelid addresses excess skin  is repaired by blepharoplasty.

Ptosis occurs when the muscles that raise the eyelid (levator and Müller's muscles) are not strong enough to do so well. It can affect one eye or both eyes and occurs more often in the elderly, as muscles in the eyelids may possibly begin to deteriorate.