A preliminary investigation of human adaptations for various virtual eyes in video see-through HMDS

Abstract

A video see-through head mounted display (HMD) has a different viewing point than does the real eye, resulting in visual displacement (VD). VD deteriorates visuomotor performance due to sensory conflict. Previous work has investigated this deterioration and human adaptation by comparing fixed VD and real eye conditions. In this study we go a step further to investigate whether any differences in visuomotor and adaptation trends exist across 16 distinct VD conditions. The performance tasks studied were of two types: foot placement and finger touch. In contrast to our initial prediction, the results showed equal task performance levels and adaptation within about 5 minutes regardless of VD conditions. We found that human adaptation covered a variety of VDs -up to 55 mm in the X, Y direction; up to 125mm in the Z direction; and up to 140mm of interocular distance (IOD). In addition, we found that partial adaptation gave participants the interesting experience of a sense of body structure distortion for a few minutes.

The effects of visual displacement on simulator sickness in video see-through head-mounted displays

“…Furthermore, Park et al [9] investigated the effect of 15 kinds of VD on a task of accuracy and reported that performance with 35 mm of VD was significantly better than that of other VDs; as a result, they insisted that the camera position should not be placed beyond 35 mm from the eye. However, Lee et al [6] found that visuomotor task performance during a finger touch and stepping task with 16 VDs (up to 55 mm sideways, 55 mm forward, 125 mm above, and 140 mm interocular distance [IOD]) were not significantly different from performance in a bare-eye condition.…”

“…In summary, several studies have examined the effects of VD on human task performance [6]; however, few have examined links between VD and SS. Therefore, the effect of VD on SS from 50 mm to 300 mm on X-axis (leftward) and the improvement of SS over 3 days for 200 and 300 mm of VD were examined in this study.…”