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A congenital color vision disorder. There are several types of color vision disorders, the most common being red-green color blindness. According to the theory of the three primary colors, any color in the visible spectrum can be composed of red, green, and blue.
If you can recognize all three primary colors, you are a normal person, and if you can't recognize all three primary colors, you are called total color blindness. Those who have a reduced ability to recognize any color are said to have weak colors, mainly red and green. If there is a primary color that cannot be recognized, it is called dichromism, mainly red color blindness and green color blindness.
Red-green color blindness is extremely common. Because patients do not have normal color discrimination from an early age, they are not easy to detect. Red-green color blindness is thought to be determined by two pairs of genes on the X chromosome, the red color blind gene and the green color change gene.
Because these two pairs of genes are tightly linked on the X chromosome, they are often represented by a genetic symbol. Red-green color blindness is inherited in an X-linked recessive manner. Males have only one X chromosome, so only one color blindness gene is needed to exhibit color blindness.
Females have two X chromosomes, so a pair of pathogenic alleles are needed to behave abnormally. If a normal woman is married to a colorblind male, the father's colorblind gene can be passed on to their daughter on the X chromosome, but not to their son. The daughter then passes on the color blindness gene from her father to her son, a phenomenon called cross-inheritance.
As a result, there are far more male than female patients. Because patients with red-green color blindness cannot distinguish between red and green, they are not suitable for work that requires color vision sensitivity such as art, textiles, printing and dyeing, and chemical engineering. For example, in transportation, if workers are colorblind and they cannot distinguish color signals, it can lead to serious traffic accidents.
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Color blindness cannot distinguish between colors or a certain color in the natural spectrum
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There are many types of color blindness.
But the most powerful thing is that you can only look at black and white.
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It is divided into the following categories:
Normal people with color blindness can see it, only color blindness can see it, only normal people can see it, and normal people with color blindness can't see it.
Therefore, you have to clarify these first, and then look at the test chart for identifying color blindness, whether you can see it to distinguish whether you are color blind and color weak, the common ones are chicken and sheep diagrams, cattle and deer diagrams to quickly distinguish.
Attached is a picture of chickens and sheep, normal people see sheep, and color blindness and color weakness see chickens.
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Color Blindness Check: What Numbers Do You See? Color blindness can't see anything.
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Color blindness, also known as a congenital color vision disorder, is the inability to distinguish between colors or a certain color in the natural spectrum. Color blindness is divided into total color blindness and partial color blindness (red color blindness, green color blindness, blue-yellow color blindness, etc.).
1. Clinical manifestations of various patients with color blindness:
1. Total color blindness.
Panchromatopsis is a complete cone dysfunction with no color difference, and the red color seen is dark, and the blue is bright, which is the most serious type of color vision disorder, and patients are less common.
2. Red color blindness.
Red color blindness, also known as the first color blindness, patients are mainly unable to distinguish red, red and dark green, blue and purple and purple, often regard green as yellow, purple as blue, and mix green and blue as white.
3. Green blindness.
Green color blindness, also known as secondary color blindness, is in which the patient cannot distinguish between pale green and dark red, purple and blue, purple and gray, and perceives green as gray or dull black.
4.Blue-yellow color blindness.
Also known as the third color blindness, the patient is confused with blue and yellow, and the red and green can be distinguished, which is rare.
2. The identification of patients with color blindness is generally determined by the color blindness examination chart
The color blindness chart is an examination method designed according to the principle of false homochromy, which has been used to screen for color vision abnormalities for hundreds of years. Through various types of inspection patterns, such as geometric figures, number figures, line graphics, object graphics, etc., color vision abnormalities such as red-green perception and blue-yellow perception are detected. In the case of color blindness, the person is only able to see one color, so it is impossible to distinguish the number composed of color difference.
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If you can't see a single color, you're color blind, and if you can't see a traffic light, you're color blind. If you can see a single color, but you can't see a part of the color blindness detection map, the color is weak. Color blindness and color deficiency can wear corrective glasses. Inquiries can be screened.
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To identify whether it is color blindness, you can use a color palette to ask the test person to say the color, and then compare, if it is correct, it means that it is not color blind, and if it is wrong, it will match the color blindness of the corresponding color (red-green color blindness).
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Like what; Give the person a sky blue something similar to sea blue and ask him what color it is, if correct it may not be, if wrong it is.
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Cards for color blindness tests are available in bookstores and can be bought for testing.
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Color blindness has a great impact on life, do you know how to test yourself if you are color blind.
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