Oculomotor changes within virtual environments

This paper discusses the oculomotor changes which might be expected to occu r during immersion in a virtual environment whilst wearing a Head mounted d isplay (HMD). To do so, it first examines the stimulus presented to the eye s, and then considers how this stimulus could affect the visual system. The oretical analysis and empirical results from the use of three different HMD s point towards the same conclusion, that in this context a mismatch betwee n the instrument inter-ocular distance (IOD) and the user's inter-pupillary distance is of little concern, unlike the mismatch between the instrument IOD and the inter-screen distance. (C) 1998 Published by Elsevier Science L td. All rights reserved.