Loss of color vision

According to the three primary colors theory, the loss of color discrimination of one color is called dichroism, and the loss of red color discrimination is called red blindness. The red end of this person's spectrum is shortened, and the sensitivity to the red color of the spectrum is reduced. As a dark color, he drives a red light, often because the red light is not bright enough for him. The loss of green color discrimination is called green blindness. Less yellow and blue blindness. The loss of color discrimination between two colors is called one-color vision, also known as full-color blindness, which is only divided between light and dark. Full color blindness can be divided into typical and atypical. Typical full color blindness is also known as rod cell monochromatism. Although this person has poor color discrimination, he is extremely sensitive to the saturation and brightness of the color. He is afraid of light and has low vision. Young people may have long-lasting Vertical nystagmus, the field of vision may have a small central dark spot, wearing sunglasses can help tolerate normal sunlight, dark adaptation is faster than normal people, normal people need 5 to 10 minutes, and full color blindness adaptation within 1 to 2 minutes Degree. Atypical panchromatic blindness is also known in the early literature as cone monochromatism. Such people have "normal" cone cells, which show good vision, no nystagmus or photophobia, dark adaptation and normal ERG, but Color vision is completely lost.