Quandry,

DV caused by MG can be "corrected" by covering one eye, since the DV is caused by imbalance of strength between the two eyes. Many will switch the side of the covered eye, to prevent undo strain on the "seeing" eye. However, that never worked for me, as my right eye was so very weak, it wasn't able to track well enough when the left was covered for me to be functional. I always covered the right eye.

Hope this helps.