1. A screening method for monitoring physiological variables of a test subject which is suitable for diagnosing dyslexia including the steps of: (a) positioning the head of the test subject utilizing a head movement restraint; (b) presenting an array of visual stimuli within the test subject's field of view; (c) tracking eye movement of the test subject as targeted upon the stimuli using reflected light rays from the eye of the test subject with said reflected light rays providing a pattern of eye movements; (d) superimposing the locus of said eye movements upon the visual stimuli; (e) analyzing said eye movement patterns as simultaneously registered on the visual stimuli; and (f) evaluating deviations of said eye movement patterns as responsive to discrete stimuli in said array for diagnosing dyslexia.