i have double vision in left eye due to a migrane a week ago and have had double vision for 6 days now the eye?

surgeon said it was the 4th optic nerve why seeing double vision... any ideas as to when it will repair itself or is this a permenant thing now as I cant drive work or even walk to corner store.... I have a mri scheduled in a couple of weeks... can migranes cause this problem ? Please email back to ireland5199@hotmail.com