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Proceedings Paper

Visual suppression of monocularly presented symbology against a fused background in a simulation and training environment
Author(s): Marc D. Winterbottom; Robert Patterson; Byron J. Pierce; Amanda Taylor
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Paper Abstract

When wearing a monocular head-mounted display (HMD), one eye views the HMD symbology while both eyes view an out-the-window scene. This may create interocular differences in image characteristics that could disrupt binocular vision by provoking visual suppression, thus reducing visibility of the background scene, monocular symbology, or both. However, binocular fusion of the background scene may mitigate against the occurrence of visual suppression, a hypothesis that was investigated in the present study. Observers simultaneously viewed a static background scene and HMD symbology while performing a target recognition task under several viewing conditions. In a simulated HMD condition observers binocularly viewed a background scene with monocular symbology superimposed. In another condition, viewing was dichoptic (i.e. completely different images were presented to the left and right eyes). Additionally, one control condition was implemented for comparison. The results indicate that for continuously presented targets binocular rivalry did not have significant effects on target visibility. However, for briefly presented targets, binocular rivalry was shown to increase thresholds for target recognition time in HMD and dichoptic viewing conditions relative to the control. Impairment was less in the HMD condition. Thus, binocular fusion of a background scene can partially mitigate against the occurrence of visual suppression. However, some suppression still exists which occurs between monocular pathways. Implications for the integration of monocular HMDs into Air Force training environments will be discussed.

Paper Details

Date Published: 18 May 2006
PDF: 10 pages
Proc. SPIE 6224, Helmet- and Head-Mounted Displays XI: Technologies and Applications, 622402 (18 May 2006); doi: 10.1117/12.666267
Show Author Affiliations
Marc D. Winterbottom, Air Force Research Lab. (United States)
Robert Patterson, Washington State Univ. (United States)
Byron J. Pierce, Air Force Research Lab. (United States)
Amanda Taylor, Link Simulation and Training (United States)


Published in SPIE Proceedings Vol. 6224:
Helmet- and Head-Mounted Displays XI: Technologies and Applications
Randall W. Brown; Peter L. Marasco; Clarence E. Rash; Colin E. Reese, Editor(s)

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