Diane
The diagnostic test for MG is an injectin of a drug intravenously and the test is called a Tensilon test. It only takes literally seconds to tell if MG is the problem especially if your Aunt is displaying ocular symptons at the time. I have heard of the elderly developing the disease,however, it is more than likely that she has had it for years and just not known it. Contact the locat MG Society or the one is Los Angeles, CA for more information.