Can my droopy eyelid from injury many years ago be repaired? (photo)

You have a straightforward partial separation of the muscle that raises the eyelid from the cartilage plate that stiffens the edge of the upper eyelid. That could be easily addressed through a ptosis repair that could be done by an oculoplastic surgeon or plastic surgeon experienced in eyelid surgery. 

There is one muscle that opens the eye. Some people are born with a weak muscle, most of us acquire it as we age. Yours developed after an injury. An oculoplastic surgeon would be the surgeon to evaluate you for ptosis repair.

Hello, yes, you have ptosis of your eyelid. You should see an oculoplastic surgeon who can assess your eyelid muscle function to determine what surgical approach would be best.