Do I have eyelid ptosis? My left eye droops and has not been opening in the mornings without using a finger to lift it. (photo)

You are certainly right that this looks like ptosis.  The onset of ptosis in a young person like yourself should be worked up by a physician.  See an Oculoplastic surgeon for a work-up and treatment options.

ptosis can be known as droopy eyelids, sleepy eyes , and many other common terms

 

basically , the muscles that hold up the eyelid get "rarefied " attachments.  it is repaired by forming a strong bond to reunite the muscle with the eyelid

 

most of my patients choose repair under local anesthesia.  it is safe, comfortable , and allows me to precisely position the muscle on the eyelid