Vergence-Accommodation Conflicts in Stereoscopic Displays

Martin Banks

(UC Berkeley)

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Date: February 25, 2015


Stereoscopic displays present different images to the two eyes and thereby create a compelling three-dimensional (3D) sensation. They are being developed for numerous applications. However, stereoscopic displays cause perceptual distortions, performance decrements, and visual discomfort. These problems occur because some of the presented depth cues (i.e., perspective and binocular disparity) specify the intended 3D scene while focus cues (blur and accommodation) specify the fixed distance of the display itself. We have developed a stereoscopic display that circumvents these problems. It consists of a fast switchable lens (>1 kHz) synchronized to the display such that focus cues are nearly correct. Using this display, we have investigated how the conflict between vergence and accommodation affects 3D shape perception, visual performance, and, most importantly, visual comfort. We offer guidelines to minimize these adverse effects.

Further Information:

Martin S. Banks is a Professor of Optometry and Vision Science at the University of California at Berkeley. He has received numerous awards for his work on basic and applied research on human visual development, on visual space perception, and on the development and evaluation of stereoscopic displays. He was appointed Fellow of the Center for Advanced Study of the Behavioral Sciences (1988), Honorary Research Fellow of Cardiff University (2007), Fellow of the American Association for the Advancement of Science (2008), Fellow of the American Psychological Society (2009), Holgate Fellow of Durham University (2011), and WICN Fellow of University of Wales (2011).

Professor Banks received his Bachelor’s degree at Occidental College in 1970 where he majored in Psychology and minored in Physics. He received a Master’s degree in Experimental Psychology from UC San Diego in 1973 and a doctorate in Developmental Psychology from University of Minnesota in 1976. He was Assistant and Associate Professor of Psychology at the University of Texas at Austin from 1976-1985. He moved to UC Berkeley School of Optometry in 1985, and was Chairman of the Vision Science Program from 1995-2002, and again in 2012.

Created: Friday, February 27th, 2015