I'm diabetic and i see double.?

Almost 4 months ago, i was in a diabetic coma for 2 weeks after developing pancreatitis. I had what the doctors call pre-diabetis but it was never a effect on my life until the pancreatitis. After getting out of the hospital, the doctors said my vision will be blurry for a while cause my blood sugar, while in the hospital was so high. But now, about a month ago...i went to the eye doctor to get a new prescription and they checked my eye's for retinopathy. They said i showed no sign of diabetes and everything looked good. I got a new prescription for contacts and gles. But now, as when i first got the contacts and cles. I see double. The doctors re-checked my eye's and she said she couldn't find anythign wrong with my eyes. But the double vision is there. The prescription is fine i can tell..but seeing double makes everything..."blurry". I did some reading and found it might be focal neuropathy. Can this be fixed with vitamins? if so which ones..or what else can i do?