Since the development of soft imaging techniques (MRI, ultra sound, etc.) doctors are finding more and more of us with "some" eye muscle changes (due to the processes involved with TED). In one article I read, it was thought that all of us could have "some" eye muscle changes. But the vast majority of us do not develop the horrible eye disease. We may get some symptoms, but not the debilitating, disfiguring ones.
Dry eyes go hand in hand with thyroid diseases, for some reaons. Be sure that you are putting artificial tears in your eyes to counteract the dryness. These are not the "get the red out" types of drops, nor are they the drops for allergic conditions. There are a variety of products, some thicker than others. But keeping your eyes well-lubricated can help prevent damage to the corneas.
Wishing you well,