I'm a hypo-Hashi person, and I've had that happen to me in the past before...when my levels were pretty hypo. One night in particular, I looked in the mirror, and one eye was very noticeably larger than the other...it scared me, to tell ya the truth. Of course, my hubby said, "no, it looks the same to me"...I knew better. (He always denies things with me, to try to keep me calm)
Anyway, the following morning, it was much better. (That was probably over a year ago) I just saw some recent pictures taken of me tho, and I noticed I still have a larger eye
...not huge larger, but it is bigger than the other. How weird, huh? I wonder if it will stay that way? I don't mention it to my Dr. tho....they already think we imagine these things...most of the time.
I can live with one eye a bit bigger, so long as I'm not hurting in pain all over...which seems to be the case lately...(not feeling too bad) I do have a girlfriend who happens to have both Hashi's-hypo and Grave's, and she gets the same thing. Her's comes and goes. She too pretty much ignores it...but if I had any pain along with it, I would definitely see my Dr. about it.
Best of luck,