Hi, I have had the same issues for over two years now. I have had my thyroid meds switched around multiple times. I am now on T3 and T4 separately vs Armour which has them both. I also have the under eye puffiness that came on overnight and has never gone away. I usually get the flashes at night. One thing that I have found is that my neck can cause a ton of eye issues. I used to sit in a recliner and had to stop because there is a pillow that pushes my neck forward and then I get all kind of crazy eye issues. Very very scary stuff. Was so afraid to close my eyes at night as I thought I might go blind. I also have dry eyes and this can contribute to the flashes as well. Thyroid issues can certainly cause a lot of problems. I believe my dry eyes are caused by the hormone fluctuations. Hope you can figure this out!