Hi, and welcome. The first test usually run is the Acetylcholine Receptor Binding Antibody. It is the one that is most positive in people with MG. You can have MG and not have the other two - modulating and blocking - be positive. Those were probably the other two that were run. And these antibody tests can fluctuate. A couple months from now, or if you get worse, blocking antibodies might show positive.

The fact that you had a positive MG antibody test means that you need to go see a neurologist for further testing. An ophthalmologist, while it's good that he ran the test, is not the doctor who can diagnose MG!

There are other tests that can be done like a repetitive nerve stimulation test and a Single Fiber EMG. And they can rerun the antibody tests and send them off to somewhere like Mayo to be done.

Did this eye doctor say if you have fatigable ptosis? Otherwise known as droopy eyelids. Your eyebrows or face in general can droop too.

MG is all about muscle weakness that gets worse upon exertion and better with rest (relatively). If you have droopy eyelids, try putting a cold washcloth on one of them for a minute and see if it gets better. If it does, that's a pretty good sign you have MG. But you have to see a neuro to be diagnosed!!! And get treatment.

www.myasthenia.org is a good website.

Does that answer your questions, at least for now? If you say where you live, someone here might be able to recommend a good neuro in your area.

I hope you get help soon.

Annie