Oculomotor changes within virtual environments

This paper discusses the oculomotor changes which might be expected to occur during immersion in a virtual environment whilst wearing a Head mounted display (HMD). To do so, it first examines the stimulus presented to the eyes, and then considers how this stimulus could affect the visual system. Theoretical analysis and empirical results from the use of three different HMDs point towards the same conclusion, that in this context a mismatch between 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 Ltd. All rights reserved.