i know neurologically that Vit D is very important. i would push to take a supplement of Vit D. have the dr tell you the dose. i take 1000 IU's/day. a lot of us take Vit D.

another thought i had was: have you seen an opthamologist? many times with vision/eye symptoms the eye dr can see MS changes. i'm not saying that's what it sounds like. but don't overlook an eye exam by an eye DR, not optomatrist.

you might also want to consider the suggestion of getting a 2nd opinion from a neurologist or an MS specialist. get copies of your test results and cd's of your mri's. you'll need them and it's a good idea anyway when you're having as much done as you are. start amassing a medical file on yourself you can take to different drs.

keep us posted.