Basic studies of VRT and pocket flicker as a new apparatus for fatigue measurement

分析了VRT设备CRT的照度和亮度、照度和人眼与袖珍闪烁发光二极管(LED)的距离的影响，以及P.F.的临界融合频率(CFF)和VRT值随年龄的变化。在CRT的亮度中观察到了VRT值的显著差异，但在照明方面没有观察到明显的差异。因此，只要亮度设置恒定，VRT值就不会随照明而改变。对于眼睛到LED的距离，P.F.的CFF值有显著差异，但没有观察到照明的差异。因此，当距离恒定时，CFF值不会随照明而改变。提示中年组肺功能的CFF值明显高于青年组。这一结果表明，当受试者属于不同年龄段时，应考虑CFF值。研究表明，只要受试者经过充分的训练，VRT值不会随年龄变化。

The effects of the intensity of illumination and luminance of the CRT of a VRT apparatus, the effects of intensity of illumination and distance between the eyes and the light emitting diode (LED) of a pocket flicker (P.F.), and the changes in the critical fusion frequency (CFF) of the P.F. and in the VRT values with age were analyzed in this study.The results obtained in this study are as follows.1. A significant difference in VRT values was observed in the luminance of the CRT, but not for the illumination. Therefore, the VRT value does not change with the illumination as long as the luminance setting is constant.2. A significant difference in the CFF values of the P.F. was observed for the distance between the eyes and the LED, but not for the illumination was not observed. Accordingly, the CFF value does not change with illumination, when the distance is constant.3. It was suggested that the CFF value of the P.F. in the middle-aged group was lover than that of the younger group. This result shows that the CFF value should be taken into consideration when subjects belong to different age groups.4. It was clarified that the VRT value does not change with age as long as subjects are trained sufficiently.