Do I have ptosis on my left eye? (photos)

I used to wear contact lenses. I have also had minor trauma to my left eyelid (right eye in the pic). Sometimes my left eyelid feels tired and different from the right one. I have attached a pic which on a bad day what my eye looks like. Does my left eye have Ptosis? would the muller's muscle resection technique be appropriate? Is one way to be 100% sure if this is ptosis and if the muller method would work is to use phenylephrine eye drops? Would the feeling also go away after surgery?