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Proceedings Paper

Visual Issues In The Use Of A Head-Mounted Monocular Display
Author(s): Eli Peli
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Paper Abstract

A miniature display device, recently available commercially, is aimed at providing a portable, inexpensive means of visual information communication. The display is head-mounted in front of one eye with the other eye's view of the environment unobstructed. Various visual phenomena are associated with this design. The consequences of these phenomena for visual safety, comfort, and efficiency of the user were evaluated: (1) The monocular, partially occluded mode of operation interrupts binocular vision. Presenting disparate images to each eye results in binocular rivalry. The two images may appear superimposed, with one image perceived with greater clarity or com letely dominant. Most observers can, use the display comfortably in this rivalrous mode. In many cases, it is easier to use the display in a peripheral position, slightly above or below the line of sight, thus permitting normal binocular vision of the environment. (2) As a head-mounted device, the displayed image is perceived to move during head movements due to the response of the vestibulo-ocular reflex. These movements affect the visibility of small letters during active head rotations and sharp accelerations. Adaptation is likely to reduce this perceived image motion. No evidence for postural instability or motion sickness was noted as a result of these conflicts between vis-ual and vestibular inputs. (3) Small displacements of the image are noted even without head motion, resulting from eye movements and the virtual lack of display persiste ce. These movements are noticed sponta e ously by few observers and are unlikely to interfere with the display use in most tasks.

Paper Details

Date Published: 1 November 1989
PDF: 13 pages
Proc. SPIE 1199, Visual Communications and Image Processing IV, (1 November 1989); doi: 10.1117/12.970126
Show Author Affiliations
Eli Peli, Eye Research Institute of Retina Foundation (United States)
Harvard Medical School (United States)

Published in SPIE Proceedings Vol. 1199:
Visual Communications and Image Processing IV
William A. Pearlman, Editor(s)

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