ABSTRACT
The use of new visual informational displays such as head-mounted displays for virtual reality, head-up displays for automobiles and stereoscopic displays for industrial design, medical training and entertainment has been steadily growing. Along with this increased use, there are scattered reports (Peli 1996) that visual fatigue might be induced by prolonged use of those displays. Although accommodation and vergence have a close relationship with such phenomena, few objective studies exist.
