Nonencumbering visual performance measurements. Paper presented at the International Automotive Engineering Congress, Detroit Michigan, January, 10-14 1972.

Instrumentation has been developed to track and record dynamically an automobile driver's voluntary eye motions with no encumbrance to the driver's head or eye. This portable eye-tracking system makes possible field studies of the driver's: 1. angle of gaze referenced to the scene. 2. involuntary eye motions as possible indications of physiological state (fatigue, intoxication, etc.) 3. pupil response.