not sure on this one but i had a quick look at nutritional ideas for devic's. seen this yet?:
Gluten sensitivity and neuromyelitis optica: two case reportshttp://www.ncbi.nlm.nih.gov/pmc/article ... p01028.pdf
my instinctive go-to as a common denominator for gluten sensitivity and neuromyelitis optica would be zinc status.
the poor iron status and lower hemoglobin was noted in that one case study so you could watch for that - i think if iron is down it's reasonable to expect zinc to be down too - i'll see if i can link you up to some info i had on that subject too if you like.
anyway if you're able to get some blood tests done there are some potential things to investigate. if you find anything's off the mark, you could figure out an action plan to correct an then see how you do
couldn't quickly find a study on zinc status in devic's patients but will keep looking another time. hope you are feeling better today.