现代医学把对颜色视觉不正常称为色觉障碍。色觉障碍包括色弱和色盲两大类。色弱是指对颜色的辨别能力不足。这类患者识别颜色需要较强的照明、较深的色度、较大的视角和较长的时间,在光线不足、色泽较淡、色差不大、目标较小和时间短促的情况下,便不能同正常人一样识别颜色。这类患者虽然辩色能力差,但视力不受影响。色盲是指不能 Modern medicine refers to color vision disorders as color vision disorders. Color vision disorders, including color weakness and color blindness two categories. Color weakness refers to the lack of ability to distinguish color. Such patients need to identify the strong color lighting, darker color, larger viewing angle and longer time, lack of light, color lighter, color is not, the target is small and time is short, then Can not identify the same color as normal people. Although these patients poor ability to debate color, but the visual acuity is not affected. Color blindness means no