Eye movement analysis is a complicated area in Neurology and multiple sclerosis (MS). We take eye movements for granted, placing them somewhere on the awareness scale between waving one's hand to say hello and automatically activating chest muscles that assist with respiration.

There is willful action when we cooperate with commands to: "Look over here". One consciously trains one's gaze to the requested site. On the other hand, when one "has a look around" Sherlock Holmes style at a...