Hi, Juliejayne. Welcome.
I believe these articles will shine some light on the situation.
Monocular DV is NOT caused by MG. There is usually another cause, even if it's "too difficult" for a doctor to figure it out!
A person can have both binocular and monocular DV.
I have astigmatism. It doesn't matter which eye I close, the DV always goes away. A "fuzzy" area around an object is not DV. gr8ful, that is not true, what you said about astigmatism or your eyes being "tired."
I get a little crazy when science is ignored (by doctors). It's lazy doctoring!
I think you need to go see a neuro-ophthalmologist, if you can. They might better determine what is going on for you.
I hope you can get it figured out!
Annie
http://emedicine.medscape.com/article/1189759-overview
http://www.dartmouth.edu/~dons/part_1/chapter_4.html
http://www.aao.org/publications/eyen...11/feature.cfm
http://jnnp.bmj.com/content/75/suppl_4/iv24.full