While the nature of eye and head displacements to target acquisitions in the horizontal plane have been frequently studied, such investigations in the vertical plane are somewhat scarce. In the experiment reported herein the final displacements of the head, eye, and gaze were examined for target acquisitions in the vertical and horizontal planes. The subjects' task was to fixate on a central target until receiving a verbal command to fixate on one of four peripheral targets. The analysis of the mean head, eye, and gaze displacement data to the target locations suggests similar trends across the vertical and horizontal planes.
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