基于颜色VEP的色觉缺陷检测系统的研究

本研究介绍了一种基于颜色视觉诱发电位（VEP）的色觉缺陷检测系统。现代电生理检测理论认为当视觉神经系统接收到颜色刺激时，将产生相应的脑皮层电位分布。通过适当的颜色刺激诱发，能够定量地测量色觉缺陷人群的缺陷种类及缺陷程度。该系统由颜色刺激发生器、测试电极、放大滤波电路、A／D转换电路、工作主机等部分组成。系统用等亮度反转点来表征色觉缺陷的种类及程度，实现了客观定量的色觉缺陷检测要求。

Research of Color Vision Deficiencies Testing System Based on Chromatic VEP

A testing system for color vision deficiencies based on chromatic visual evoked potential (VEP) was described in this paper. The theory of electrophysiology considers that the VEP may be elicited by the color stimulus. It is possible to test the type and degree of color vision deficiencies by some proper color stimulus. The proposed system consisted of color stimulus producer, electrodes, amplifier and filter, A/D converter, main station, etc. The shift point of equiluminance was taken as the parameter of color vision deficiencies. Experimental results demonstrated that the system fulfilled the impersonal and quantitative measurement in color vision test was available.