A head-mounted video-camera-based eye sensor system and method for measuring palpebral movement is disclosed. The system and method comprise a display that includes at least one display element responsive to palpebral movement information from the eye sensor. The system and method also comprise an electronic interface to a vehicle or powered equipment to transmit the palpebral movement information to the vehicle or powered equipment. The system and method can be used to alert the user, the vehicle, and/or the powered equipment to the fact that a person might be experiencing vertigo, motion sickness, motion intolerance, and/or spatial disorientation.
