I have had MS since 2002, one of my major symptoms was that I lost my eye sight in my left eye, I had no vision what so ever. Along with that I had a few other problems as well as numbness and such but the most serious was my eye sight. This happen in Feb of 02 and went on till Aug of 02. At the time I had no clue that I even had MS, I put it off to working to much and laying in the tanning bed. When I finally got in and got dx with MS and ON I was put on steroid treatments right away for a week. Not only did it clear up my symptoms but I got my eye sight back. I have not lost my eye sight completely like before but I do know that when I start going into a flare up the way to tell is by my ON. MY eye's start getting blurry or double visioned and after getting the steroids it clears up. Hope this helps and that I didn't shoot over the point. Take care.