提出了一种基于瞳孔直径的视频显示终端(VDT)视觉舒适度评价方法。在3种光环境和5种VDT屏幕亮度下进行眼动实验,采集被试者瞳孔直径数据,并对每种条件下视觉舒适度进行主观评分。采用统计学分析方法,从性别、用眼习惯以及是否佩戴眼镜等方面系统研究被试者瞳孔直径变化与视觉舒适度间的对应关系。实验结果表明,与视觉舒适下的瞳孔直径相比,当因光环境较暗引起视觉不舒适时,被试者的瞳孔直径相对变化量为17.61%~24.55%,当因光环境较亮引起视觉不舒适时,被试者的瞳孔直径相对变化量为-6.12%~-12.45%,而当被试者处于视觉舒适状态下,瞳孔直径相对变化量为-2.14%~2.14%。这项工作对于VDT视觉健康评价标准的建立、健康光环境设计等具有重要意义。

A visual comfort evaluation method of video display terminal (VDT) based on pupil diameter was proposed. An eye movement experiment was conducted in three kinds of lighting and five kinds of video display terminal luminance, in which the pupil diameter data of the subjects were collected, and the subjective ratings were also given for visual comfort under each condition. Statistical analysis was used to systematically study the corresponding relationship between pupil diameter change and visual comfort from three aspects, including gender, eyes habit, and whether glasses-worn or not. Experimental results showed that, compared with the pupil diameter under the condition of visual comfort, the relative variation of pupil diameter is from 17.61% to 24.55% when the visual discomfort is caused by the dark light environment, the relative variation of pupil diameter is from -6.12% to -12.45% when the visual discomfort was caused by the bright light environment. But the relative variation of pupil diameter is from -2.14% to 2.14% when the subjects were in a state of visual comfort. This work is of great significance for the establishment of VDT visual health assessment standards and the design of healthy light environment.