If the double vision is exactly the same every day, and has been for several months, yes, it would help. However, that's rarely the case since MG is so variable. I've read of some people getting "stick on" prisms in various strengths that they changed out depending on symptoms, which might also work. Or, if you are bad like I was, there might now be any prism strong enough to help that they could incorporate into eyeglasses.