I had orbital radiation, I think I had 2 extra days in addition to the 2 5-days courses. I had severe ophthalmopathy and had completed IV steroids. The treatment itself is no problem and I was on oral prednisone during and for a couple of months after treatment. It stopped the progression of the diplopia and helped a lot with irritation. In my case, it did not return eyes to normal and I had orbital decompression and strabismus surgery the following year. I had optic neuropathy, which is why I had IV steroids and the radiation. It does need to be done like within 6 months of beginning of eye symptoms and I was at 8 months so the sooner the better. The fitting of the mask is a bit scary but being tied down via the mask to the table turned out to be not so bad. I had it done at Emory.