Ptosis or excess skin? (photos)

Thank you for sharing your concerns. First, your ptosis (droopy eyelid) is not caused by your weight. It is easily corrected by an experienced oculoplastic surgeon. Downtime is about 2 week and results are usually excellent. I hope you find this helpful.

While some asymmetry of the face and eyes is normal if you
have ptosis of one eyelid surgery can be effective in improving this. Ptosis
repair involves tightening of the levator muscle to eliminate eyelid drooping.
If excess upper eyelid skin is hooding the eye and needs to be eliminated, an
incision is made in the crease at the top of the lid. The incisions are closed
and sutured on the underside of the skin. The sutures are removed in four to
six days. I suggest making an appointment with a board certified plastic
surgeon who is experienced in ptosis repair.

You have a ptosis of the right upper lid.  Has nothing to do with weight gain or loss.  You should see an oculoplastic surgeon who can evaluate the lid muscles to determine what surgery would be best for you.