A tracking system has been developed that employs a first-line camera to track horizontal eye motion and a second-line camera to track vertical eye motion. The output signals from both camera processors identify and track eye motion using a correlation or edge detection algorithm on boundaries between the sclera, iris and pupil. Eye-motion data is compared with that of a model to obtain a measure of fitness for the individual.Applications: Public safety; employee monitoring; gaming and computer interfaces for the disabled.Assignee: Sarnoff Corp. (Princeton, N.J.)Inventors: T. Chmielewski Jr. and J. MateyFiling/Publication Date: 03-25-04/06-03-08