[The working adaptation in visual display terminal (VDT) workers]

The working adaptation in VDT workers was conducted by investigating from two different standpoints: one was to indicate an improvement of working conditions and environments around the VDT workers, evaluating the fundamental data of their visual physiological functions, and the other was to investigate the relation between their performances and production. The results were as followed: 1. Eye strain induced by VDT work was able to take an objective view as accommodative and convergent depression including the tear productive function, followed by making good working conditions. 2. The measurement of eye movement was able to analyze the response time and the response process for the informations indicating on the display, and the concept of recovery time for deteriorated accommodative function was useful to improve the display design. 3. It was suggested that the measurement of visual evoked potential was more simple method to evaluate the workers' attention. 4. The relation between performance and psychological stress and the time course analysis of performance were studied, so that it was given suggestions as to assign suitably the work management and the working design to each VDT worker.