My first suggestion would be to try an eye patch. Sometimes the vision is off just enough to cause that issue, and the strain trying to "WORK" both eyes at the same time is what causes it. But definitely - make sure you seen an eye doctor and have your exam.

And please do not forget to mention that you have MG...mine had just come back from a conference/meeting/seminar and was quite intrigued by my symptoms at the time!

Lydia