Effect of Accommodation Training in Foreign Labor

By relaxing the contracted focus-adjustment muscles around the eyeball, such as the ciliary and extraocular muscles, improvement of the pseudo-myopia is expected. This understanding has led to the accommodation training in which the visual target is given by stereoscopic video clips. However, it is pointed out that the motion sickness can be induced by viewing stereoscopic video clips. In the measurement 1 of this study, we verify whether the new 3-dimensional (3D) technology reduce the severity of motion sickness in accordance with the stabilometry. We then evaluate short-term effects of the accommodation training utilizing new stereoscopic video clips on foreign labors (11 females) suffering from eye fatigue in the measurement 2. The foreign workers were trained in 3 days. We could show that the new 3D technology reduce the severity of motion sickness in accordance with the stabilometry. The effect of the accommodation training utilizing the new 3D video clip was investigated in foreign labors suffering from eye fatigue, and the eye strain was reduced by the continuous accommodation training for a short-term period.

[1]  Hideki Kakeya,et al.  Combining volumetric edge display and multiview display for expression of natural 3D images , 2006, Electronic Imaging.

[2]  Hiroki Takada,et al.  Effect of strategic accommodation training by wide stereoscopic movie presentation on myopic young people of visual acuity and asthenopia , 2011, Displays.

[3]  行雄 渡辺,et al.  重心動揺のQ&A,手引き(1995) , 1996 .

[4]  Robert S. Kennedy,et al.  Simulator Sickness Questionnaire: An enhanced method for quantifying simulator sickness. , 1993 .

[5]  Michael J. Griffin,et al.  Correlation Between Heart Rate and the Severity of Motion Sickness Caused by Optokinetic Stimulation , 2001 .

[6]  S Saito,et al.  Visual accommodation and subject performance during a stereographic object task using liquid crystal shutters. , 1996, Ergonomics.

[7]  K M Newell,et al.  Quantification of postural sway patterns in tardive dyskinesia , 1993, Movement disorders : official journal of the Movement Disorder Society.

[8]  Yoichi Yokota,et al.  Motion sickness susceptibility associated with visually induced postural instability and cardiac autonomic responses in healthy subjects , 2005, Acta oto-laryngologica.

[9]  Katsuhiko Tsujioka,et al.  Differences in autonomic responses between subjects with and without nausea while watching an irregularly oscillating video , 2004, Autonomic Neuroscience.

[10]  M. Miyao,et al.  Metamorphism in potential function while maintaining upright posture during exposure to a three-dimensional movie on an head-mounted display , 2009, 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society.

[11]  K. M. Newell,et al.  Stochastic processes in postural center-of-pressure profiles , 2006, Experimental Brain Research.

[12]  J. Collins,et al.  Open-loop and closed-loop control of posture: A random-walk analysis of center-of-pressure trajectories , 2004, Experimental Brain Research.

[13]  Yasushi Okubo,et al.  Association between duration of daily VDT use and subjective symptoms. , 2002, American journal of industrial medicine.

[14]  Lm Scibora,et al.  Wider stance reduces body sway and motion sickness , 2007 .

[15]  H. Takada,et al.  Mathematical Index and Model in Stabirometry , 2001 .

[16]  Hiroki Takada,et al.  Effect of Accommodation Training on Visual Function of Visual Inspection Workers and Middle-Aged People , 2012 .

[17]  Peter A. Howarth,et al.  Visual fatigue caused by viewing stereoscopic motion images: Background, theories, and observations , 2008, Displays.

[18]  Hiroki Takada,et al.  An Attempt at Preventing Asthenopia Among VDT Workers , 2003, International journal of occupational safety and ergonomics : JOSE.