Stereoscopic Displays and Accommodative Focus

Kazuhiro Fujikake¹, Masako Omori², Satoshi Hasegawa³, Hiroki Takada⁴, Hiroshi Tahara⁵ and Masaru Miyao⁶*

¹The Institute for Science of Labour, 2-8-14 Sugao, Miyamae-ku, Kawasaki 216-8501, Japan
²Factory of Home Economics, Kobe Women’s University, 2-1 Aoyama, Higashi-suma, Suma-ku, Kobe 654-8585, Japan
³Department of Information Culture, Nagoya Bunri University, Inazawa, Aichi 492-8520, Japan
⁴Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui, Fukui 910-8507, Japan
⁵Remedia Co., Ltd., 1998 Horiuchi, Hayama-cho, Kanagawa 240-0112, Japan
⁶Graduate School of Information Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
*E-mail address: miyao@nagoya-u.jp

(Received November 1, 2010; Accepted May 10, 2011)

Abstract. In the present study, we examined the visual accommodation of subjects who were gazing fixedly at stereoscopic images on two different displays: a cathode ray tube (CRT) with the subjects wearing liquid crystal shutter glasses and a liquid crystal display (LCD) with the subjects not wearing liquid crystal shutter glasses. In Experiment 1, we measured accommodation in subjects viewing a moving stereoscopic image. In Experiment 2, we measured accommodation in subjects viewing moving stereoscopic images on an LCD and a CRT. In Experiment 3, we measured accommodation in subjects viewing a stereoscopic image moving from far to near on an LCD. In Experiment 4, we measured of accommodation in subjects viewing moving stereoscopic images (stereoscopic display mode) and non-stereoscopic images (2-D mode) on an LCD.
The results suggested, the ciliary muscle is repeatedly strained and relaxed while the subject views the moving target. In the present study, the subjects’ accommodative amplitude was changed when the target moved from the near to far point, and vice versa.

Keywords: Accommodation, Binocular Vision, Stereoscopic Image and Visual Display