Hiroki Takada1,2* and Masaru Miyao3
1Graduate School of Engineering, University of Fukui, Fukui 910-8507, Japan
2Graduate School of Medicine, Aichi University of Medicine, Nagakute 480-1195, Japan
3Graduate School of Information Science, Nagoya University, Nagoya 464-8603, Japan
*E-mail address: takada@u-fukui.ac.jp
(Received January 5, 2012; Accepted June 19, 2012)
Abstract. It is generally understood that "accommodation" and "convergence" are mismatched during stereoscopic vision and that this is the main reason for the visual fatigue and the visually induced motion sickness (VIMS). The aim of this paper is to explain results of recent studies by the present authors on this problem. Fixation distances between accommodation and convergence in young and middle-aged subjects are compared while they viewed 2D and 3D video clips, and the severity of motion sickness induced by viewing 3D video clips on a liquid crystal display (LCD) was analyzed by comparing to that induced by viewing these films on a head-mounted display (HMD), and then the body sway models are discussed. It is concluded that the accommodative power depends on the distance of convergence while the accommodation of middle-aged subjects is weak in viewing 3D images. Moreover, statistical comparisons revealed that viewing the 3D film on the HMD significantly affected the body sway, despite of a large visual distance.
Keywords: Accommodation, Convergence, Visual Fatigue, Visually Induced Motion Sickness (VIMS), Stabilometry