I was diagnosed by positive Tensilon test and positive response to Mestinon and prednisone. Antibody negative and EMG negative. Unfortunate that it took 7 years to get there. Even after being seen by a "leading" neuro ophthalmologist and neuromuscular specialist at a large teaching institution. Weakness was "not physiologic" according to the experts. Hmm.... If I sound bitter, it's because I am.

Doing better now and being followed by a wonderful neurologist. Trying to put the past behind me, but often think that I would have had a better response to therapies had I been treated a bit sooner. Double vision has never cleared, except on high doses of prednisone. Retired early due to all this. Learning to pace myself and enjoy the little things in life.