I have had a lot of vision problems with TED including what you describe, tho maybe not so dramatic. You do not mention any double vision, but the blurriness could be a lesser version of that or a precursor. I have, in addition to the ophthalmologists with whom I have worked, a wonderful optometrist who understands the illness. He prescribed prism glasses (not freinels which did not work at all and really made my vision blurry.) I used the same glasses for 1 1/2 years but last spring, a year after orbital decrompression, which was quite successful, my vision started to deteriorate. The optometrist did a very extensive work up and found 1) my refraction had actually changed and 2) I needed addional prisms. I got new glasses and voila, I could see and read etc.
But the glare problem persisted, of course because the eyes are open too wide with TED. I knew I would be scheduling a lid surgery to lower the lid and reduce the light entering the eye which also dries cornea.
I had that surgery a week ago which seems successful but it will be a while before I know for sure. So several things: Where are you on the inflammation, stability curve with your TED and are you a candidate for any of the surgeries? Has your refraction changed? Are you using enough artifical tears and things like refresh PM at night to keep your eyes lubricated? Has your optometrist explored the idea of putting prism in your eyeglasses?
I hope this is helpful.