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Optical Engineering

Optometric measurements predict performance but not comfort on a virtual object placement task with a stereoscopic three-dimensional display
Author(s): John P. McIntire; Steve T. Wright; Lawrence K. Harrington; Paul R. Havig; Scott N. Watamaniuk; Eric L. Heft
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Paper Abstract

Twelve participants were tested on a simple virtual object precision placement task while viewing a stereoscopic three-dimensional (S3-D) display. Inclusion criteria included uncorrected or best corrected vision of 20/20 or better in each eye and stereopsis of at least 40 arc sec using the Titmus stereotest. Additionally, binocular function was assessed, including measurements of distant and near phoria (horizontal and vertical) and distant and near horizontal fusion ranges using standard optometric clinical techniques. Before each of six 30 min experimental sessions, measurements of phoria and fusion ranges were repeated using a Keystone View Telebinocular and an S3-D display, respectively. All participants completed experimental sessions in which the task required the precision placement of a virtual object in depth at the same location as a target object. Subjective discomfort was assessed using the simulator sickness questionnaire. Individual placement accuracy in S3-D trials was significantly correlated with several of the binocular screening outcomes: viewers with larger convergent fusion ranges (measured at near distance), larger total fusion ranges (convergent plus divergent ranges, measured at near distance), and/or lower (better) stereoscopic acuity thresholds were more accurate on the placement task. No screening measures were predictive of subjective discomfort, perhaps due to the low levels of discomfort induced.

Paper Details

Date Published: 10 March 2014
PDF: 9 pages
Opt. Eng. 53(6) 061711 doi: 10.1117/1.OE.53.6.061711
Published in: Optical Engineering Volume 53, Issue 6
Show Author Affiliations
John P. McIntire, Air Force Research Lab. (United States)
Steve T. Wright, U.S. Air Force (United States)
Lawrence K. Harrington, Ball Aerospace & Technologies Corp. (United States)
Paul R. Havig, Air Force Research Lab. (United States)
Scott N. Watamaniuk, Wright State Univ. (United States)
Eric L. Heft, Air Force Research Lab. (United States)

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