Graves' Disease Support Group
Graves-Basedow disease is a medical disorder that may manifest several different conditions including hyperthyroidism (over activity of thyroid hormone production), infiltrative exophthalmos (protruberance of one or both eyes and associated problems) and infiltrative dermopathy (a skin condition usually of the lower extremities). This disorder is the most common cause of...
http://www.arupconsult.com/Topics/Thyroiditis.html
I've been through all those eye tests and my understanding is they are quite safe. If you suspect a flare up of TED its very important you have these measurements done so that down the road they have a point of reference...Big Hugs...Kathy