Hi, lots of history. Had some type of problem about 15 where when I turned my head it felt like someone hit me on the back of the lower head with a baseball bat. Screamed and never heard it. Dr. said maybe pinched nerve. This was the beginning of a long and horrible roller coaster ride. I just turned 59 and got disabled in 2006 after many things but then a sight robbing bout of Optic Neuritis. I had had it before but didn't know what it was and it got better. This time it took my acuity vision in (L) eye to read and some loss of color.