Dynamic measurement of accommodative responses while viewing stereoscopic images


Using video refraction accommodative and convergence dynamic responses were measured to stepped changes in convergence stimuli with unchanged accommodative stimuli (conflicting stereoscopic image) and compared with responses to non-conflicting target stimuli. Three targets were used that varied in their spatial frequency components. An accommodative transient overshoot was evident in four out of seven subjects for only conflicting stimuli. One showed accommodative and convergence oscillation probably due to difficulty in fusing the stereoscopic target when it had a higher spatial component, however, this oscillation diminished when the target was spatial low-pass filtered. We hypothesise that transient responses to step stimuli is initiated by convergence-driven accommodation and subsequently followed by slower fine-control of accommodation modulated by the amount of blur. Inter-subject differences in convergence-driven accommodation may also be a factor to consider. For stereoscopic stimuli, it is proposed that the increase in blur immediately after the onset of the accommodative response inhibits cessation of the response.

Publication DOI: https://doi.org/10.1080/09500340701467652
Divisions: College of Health & Life Sciences > School of Optometry > Optometry
College of Health & Life Sciences > School of Optometry > Optometry & Vision Science Research Group (OVSRG)
College of Health & Life Sciences
College of Health & Life Sciences > School of Optometry > Vision, Hearing and Language
Additional Information: This is an electronic version of an article published in Torii, M, Okada, Y, Ukai, K, Wolffsohn, JS & Gilmartin, B 2008, 'Dynamic measurement of accommodative responses while viewing stereoscopic images', Journal of modern optics, vol 55, no. 4-5, pp. 557-567. Journal of modern optics is available online at http://dx.doi.org/10.1080/09500340701467652
Uncontrolled Keywords: accommodation,convergence,blur,spatial frequency,stereoscopic display,visual fatigue,Atomic and Molecular Physics, and Optics
Publication ISSN: 1362-3044
Last Modified: 28 Feb 2024 08:09
Date Deposited: 20 Jun 2012 11:56
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2008-02
Authors: Torii, Masahito
Okada, Yuuki
Ukai, Kazuhiko
Wolffsohn, James S. (ORCID Profile 0000-0003-4673-8927)
Gilmartin, Bernard



Version: Accepted Version

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