NATURAL PROBLEMS FOR STEREOSCOPIC DEPTH-PERCEPTION IN VIRTUAL ENVIRONMENTS

The use of virtual reality (VR) display systems has escalated over the last 5 yr and may have consequences for those working within vision r esearch. This paper provides a brief review of the literature pertaini ng to the representation of depth in stereoscopic VR displays. Specifi c attention is paid to the response of the accommodation system with i ts cross-links to vergence eye movements, and to the spatial errors th at arise when portraying three-dimensional space on a two-dimensional window. It is suggested that these factors prevent large depth interva ls of three-dimensional visual space being rendered with integrity thr ough dual two-dimensional arrays.