Acquired ptosis is drooping of the upper lid that can lead to visual loss. This is due to the normal functioning muscle responsible for opening the lids being stretched or detached from it's normal attachment site. Some describe it as if they have a low set baseball cap blocking their peripheral vision
Congenital ptosis is also fairly common. This happens in patients where the muscle responsible for opening the eyelid does not fully develop. This is usually present since birth but can affect vision early or later in life.
Repair of ptosis requires reattaching the normal functioning muscle in acquired ptosis or strengthening the action of the muscle in congenital ptosis. Each patient requires a customized approach to provide an optimal surgical outcome.