Why do many people can't tell blue from green and often make mistakes?

1, there are many kinds of color blindness, some are color blindness, some are red and green, some are blue and green, and some are completely blind. Among them, blue-green blindness is not a big problem in life, but as you said, blue-green is unclear. Sometimes he doesn't even notice.

2, since childhood, maybe he grew up, for example, grandparents are blue-green blind, just tell him that green is blue, blue is green, and this is a lot of cases.

Congenital color vision disorder is usually called color blindness, which can not distinguish various colors or a certain color in the natural spectrum; Those with poor ability to distinguish colors are called weak colors and weak colors. Although they can see the colors seen by normal people, their ability to distinguish colors is slow or poor.

When the light is dim, some of them are almost the same as color blindness, or they are tired, and the boundary between them is generally not easy to distinguish strictly. Congenital factors are common in color blindness and color weakness. There are far more male patients than female patients.

Etiology:

It is generally believed that red-green color blindness is determined by two pairs of genes on the X chromosome, namely the red-blind gene and the green-blind gene. Because these two pairs of genes are closely connected on the X chromosome, they are often represented by a gene symbol. The genetic mode of red-green color blindness is X-linked recessive inheritance. Men only have one X chromosome, so they only need one color blindness gene to show color blindness.

Women have two X chromosomes, so they need a pair of pathogenic alleles to behave abnormally. If a normal woman marries a color-blind man, the father's color-blind gene can be passed on to their daughter through the X chromosome, but not to their son. Daughters pass color blindness genes from father to son, which is called cross inheritance.