Synthoid is unrelated to TED. As Bobbi said.
As I have said in many posts, strabismus surgery has been the very best, most wonderful procedure in my 3 years of TED hell. Sorry, but that is what it is and has been for me. The double vision was terrible. As I “progressed” in the active phase, I was seen by a neuro ophthalmologist, who checked my vision to be sure that I was not losing it. As it turns out I was losing my vision, so I HAD to have an OD in the active phase.
But, your question was about strabismus surgery and when to have it. First of all, deciding when the active phase is over, and we can have corrective surgical procedures, is kind of a crap shoot, a little bit. It is determined by objective and subjective measurements, and throw in the passage of time. In other words, I am assuming that you have not have diplopia (double vision) measurement over the period of time you have had TED. So it might be a bit harder to tell by the objective measurements over time, cause you don't have them.
My experience is this. when you begin to notice that your eyes are not changing every day or so, getting better, getting worse, etc. etc, there is a good chance you have begun the inactive phase, or cold phase.
Regarding what the eye surgeon said, I guess I would like to know what criteria he used to say that you are still unstable. Is the first time he has seen you? Does he have prior measurements specific for diplopia (doubt it, they don't do that generally speaking.) But if it is a pediatric eye surgeon, who does strabismus surgery (not an oculofacial surgeon) and you have seem him before, it is probable that your eyes are still changing.
To further answer your questions-I thought strabismus surgery was a cake walk. No pain, IMMEDIATELY RELIEVED OF THE DOUBLE VISION. A miracle for me. Elevate head of bed for 2-3 days, use the ointment as directed. It is marvelous. Write with more questions. I did not have bruising, but I am vigilant about cold packs and elevating your head at night. I actually did that more than 3 days, probably 5 days.
TED 2008-present. OD for pressure on optic nerve 02/02/10
Eye muscle surgery 09/23/10 Upper eyelid surgery 02/01/11
Lower eyelids with grafts from palate, 10/5, 10/25/11
Graves dx/thyroidectomy 1959-Synthroid from 1980