1. A method of objective diagnostic of Internuclear ophthalmoplegia in a subject comprising the steps of: A) Collecting eye data of the subject with an eye tracking system wherein at least one fixation target is presented to the subject in a defined position configured to yield a voluntary saccadic eye response from the eyes of the patient, wherein the initial saccadic eye response to the target is a primary saccadic response and subsequent saccadic eye responses to the target are corrective saccadic eye responses to the target; B) Calculating primary saccadic response measurements and corrective saccade measurements from the eye data; C) Comparing at least one of the primary saccades response measurements of each eye to the same primary saccades response measurement of other eye; D) Comparing at least one of the corrective saccadic eye response measurements of each eye to the same corrective saccadic eye response measurement of other eye; and E) Utilizing the comparison of steps C and D as an indication of the presence of Internuclear ophthalmoplegia in a subject.