I have had one lid done twice and the other three times. Lids are extremely delicate and the muscles are thin. Both my lids were retracted and I had prior orbital decompressions through the lid and strabismus surgery, so my surgeries were more complicated. My oculoplastic surgeon commented that lids are much harder than removing bone from the orbits, so the important thing is to choose an oculoplastic surgeon experienced with Graves patients. I had one of the best surgeons in the country, an expert in Graves, and still had some complications as well as reactivation of the burned out eye disease itself. That being said, the relief from the dry eye caused by the retraction is tremendous and the return to normal appearance is also huge. One lid is slightly lower than the other but they are in normal position and the puffy lid thing is gone. The last surgery was done under local, no sedation, in the office. The others were local with IV sedation in OR. The surgery leaves a lot of bruising for a few weeks, but is not painful. I took the supplement arnica montana per docs suggestion before and after last surgery and it helped with bruising.
So consider it carefully if you are not troubled by dry eye or if friends tell you they dont really notice it. A millimeter difference in lid height is considered normal, which is where I am. I do not at all regret doing it, but it is not exactly the simple procedure it may seem to be. Most important is choosing a surgeon with Graves eye experience, even if you have to travel. You cannot go into lids too many times so be absolutely sure the eye disease itself is burned out and not changing in any way. Hope this helps.