A person notes a haziness or a cloud in one eye. He, or most of the time she, has trouble seeing colors vividly and small print and may have a central area of blackness with some pain increased as the subject moves the eye due to inflammation of the optic nerve. This is optic neuritis sometimes called retrobulbar neuritis because the inflamed area is usually behind the eyeball. The inflammation happens, reaches a peak during which time the vision gets particularly bad, then recedes. Most of the time vision returns to normal over a matter of weeks.
Symptoms vary greatly depending on the site of inflammation.
In general they affect sensory or motor function. Most of what the nervous system does is processing sensations that go to it carried by nerves and tracts, and sending signals out to control muscles to cause movement. The spinal cord is only about as wide as your thumb. It carries sensation to the brain from the arms, legs, and trunk and transmits signals for movement below the head. When an attack occurs here a person may have problems controlling the movement in the legs or have weakness that is worst in the legs.