Find a neuro-opthamologist. Even if he/she can't fix anything they can at least validate you. My first symptom of MS was optic neuritis. I saw 3 opthamologists within 2 weeks who said everything was fine -- I was persistent because I only had a mild case but everything felt off. I still had 20/20 vision but it was like someone had smeared Vaseline over my cornea (mildly blurry). In conjunction with the GP, the 4th opthamologist figured it out. Keep looking for the best doctor until you get what you need.