Ptosis or retraction?

Generally thyroid related orbitopathy can result in upper eyelid retraction, this upper eyelid could be pulled down to meet the other one via a levator recession surgery, or you probably got used to the wider eye and like it better than the ptotic eye(your normal eye), and you might want the ptotic side lift.  Both can likely be done, and your should have both options discussed with you at your consultation.  This particular problem is a tricky, I'd advise you to see an oculoplastic surgeon in your area for this one.