Static and Dynamic Characteristics of Accommodation and Vergence Responses while Viewing Stereoscopic Displays and Real Objects

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  • Mizushina Haruki
    ATR Intelligent Robotics and Communication Laboratories
  • Negishi Ippei
    ATR Intelligent Robotics and Communication Laboratories
  • Ando Hiroshi
    Universal Communication Research Institute, National Institute of Information and Communications Technology
  • Masaki Shinobu
    ATR Intelligent Robotics and Communication Laboratories

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Other Title
  • 立体映像および実物体観視時の調節・輻輳応答の静特性と動特性
  • リッタイ エイゾウ オヨビ ジツブツタイカンシジ ノ チョウセツ ・ フクソウオウトウ ノ セイ トクセイ ト ドウトクセイ

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Abstract

The conflict between accommodation and vergence stimuli has been identified as a possible cause of visual fatigue from viewing stereoscopic images. We examined static and dynamic characteristics of accommodation and vergence responses while viewing stereoscopic displays and real objects to clarify the effect of stereoscopic images on the visual function. We used an instrument based on the Shack-Hartmann wavefront sensor to measure accommodation and vergence responses simultaneously. Accommodation responses to the static stereoscopic target with large binocular disparity were deviated from those to the real target, i.e., static characteristics. The step responses of the accommodation response showed considerable individual differences, i.e., dynamic characteristics. In addition, the asymmetries of step responses of accommodation were observed between the near-to-far and the far-to-near step directions. These results suggest that we need to examine both static and dynamic characteristics of accommodation and vergence responses to clarify the biological effect of stereoscopic images.

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