The Holy Grail in MS is to find something to promote the regeneration of the protective fatty sheath that wraps around nerves. So the focus is now directed towards the eye and the speed of electrical impulses travelling from the retina to the brain along the optic nerve.
Multiple sclerosis was always thought of as a disease where the immune system attacks normal brain tissue. But research indicates the immune system may not be to blame. Instead, the thinking is the fatty wrapping around the nerves commit suicide destroying the nerve fibres.