液晶显示的红、绿色光对视觉暗适应影响的比较研究

A Comparative Experiment on Dark Adaptation after Exposure to a Red Light and a Green Light on a LCD

实验以受试者持续注视液晶显示屏上较亮的色标后辨认低亮度兰道环所需要的时间作为测量暗适应水平的指标 ,考察了液晶显示的绿色光强度变化对视觉暗适应的影响 ,并对红、绿色光在同等强度上的暗适应时间了比较。实验结果表明 :(1)不同的强度的绿色光对暗适应的影响有显著差异 ,光刺激强度越大 ,暗适应时间越长 ;(2 )光刺激作用主要集中在视网膜中央窝的条件下 ,等亮度较弱的红光与绿光之间暗适应时间无显著差异。

An experiment was conducted on a LCD to investigate the changes in dark adaptation after prolonged exposure to a green light presented on the LCD screen and a comparison was made between a green light and a red light with same intensity in the aspect of their impacts on dark adaptation.The results suggested that with an increase in the intensity of a green light,the level of dark adaptation decreased. When light stimulus was weaker and concentrated on central vision,there was no significant difference between a red light and a green light in the aspect of dark adaptation.