Taptagaporn S, Sotoyama M, Saito S, Suzuki T, Saito S
Department of Health, Ministry of Public Health, Nonthaburi.
J Hum Ergol (Tokyo). 1995 Jun;24(1):84-8.
This study aims to give recommendations for a comfortable visual display terminal (VDT) workstation design by investigating physiological resting states of the eye in 3 experiments. Dark vergence, in experiment 1, was evaluated to be at a distance of about 50 cm from the eye as an average of 14 subjects. Dark vergence was found to shift farther with an upward gaze while a nearer shift occurred with a downward gaze. In experiment 2, the average dark focus for 11 subjects was found to be 1.4 diopters (D) or a distance of about 74 cm from the eye. Experiment 3 ascertained the superiority of a positive display polarity (dark characters on a bright background) under 500 1x illuminated level, by using pupil size analysis in 10 subjects. The ergonomic recommendations for a VDT workstation obtained in this study are a positive display polarity under regular lighting condition, a downward gaze, and a viewing distance between 50 and 70 cm.
本研究旨在通过3个实验研究眼睛的生理静止状态，为舒适的视觉显示终端（VDT）工作站设计提供建议。在实验1中，对14名受试者进行评估，发现暗聚散平均在距眼睛约50厘米处。发现向上注视时暗聚散会更远，而向下注视时会更近。在实验2中，发现11名受试者的平均暗焦点为1.4屈光度（D），即距眼睛约74厘米处。实验3通过对10名受试者进行瞳孔大小分析，确定了在500勒克斯照明水平下正显示极性（亮背景上的暗字符）的优越性。本研究中获得的VDT工作站的人体工程学建议是在正常照明条件下采用正显示极性、向下注视以及50至70厘米的观看距离。
