Visual Fatigue cased by Three Dimensional Display Using Binocular Disparity

利用个人计算机构建了显示任意双目视差的立体视觉系统。受试者佩戴红蓝滤光眼镜或液晶快门眼镜。测量了线框图和随机点图诱发的主观反应（融合时间）和客观反应（眼动、调节反应和视觉诱发电位）。线框立体图在2度的视差内很容易融合。随机点立体图的视差使融合时间变长。融合或眼动的时间滞后可能与视疲劳有关。在立体VDT作用后，我们的调节反应明显下降。采用红蓝滤光片的三维VDT效果使调节速度变慢。另一方面，液晶快门对调节延迟也有影响。对虚拟环境引起的生理反应和视觉疲劳进行评估具有重要意义。

We constructed the stereoscopic vision system displaying arbitrary binocular disparities by using a personal computer. The subjects wear red-blue filter glasses or liquid crystal shutter glasses. The subjective response(fusional time) and objective responses(eye movement, accommodative response and visual evoked potentials) induced by some wireframe and randomdot stereograms have been measured.The wireframe stereogram was fused easily within 2 degrees in disparity. Disparity in randomdot stereogram made the fusional time longer. The time lags on the fusion or on the eye-movement would be related to the visual fatigue after seeing stereograms. Our accommodative response was decreased remarkably after stereographic VDT works. Three dimensional VDT works with red-blue filters influenced the accommodative velocity to be slower. On the other hand, that works with liquid crystal shutters affected the accommodative latency additionally.It would be important to estimate the physiological responses and the visual fatigue induced by the virtual environment.