The present application is directed to piezoelectric actuator devices. Through an opening in the carrier substrate, the assembly has intermediate conductive elements extending between bond pads of the semiconductor die and contact pads of the carrier substrate. The covering plate is connected via a plurality of inlet openings to at least one blast air source. The back portion has a lower section for supporting the thorax and lower back, and two overlying sections which are positionable for supporting and restraining rearward movement of the helmeted or unhelmeted head and the neck. Subsequently, the coordinates of the corresponding visual point in the field of view video are extrapolated from the pupil coordinates for each frame in the eye video.