In the eighteenth century, the famous British scientist Dalton first discovered color blindness, and he himself became the first person to be confirmed to suffer from color blindness. Nowadays people are not surprised by this kind of visual impairment, but some people find that their dogs also seem to have this kind of visual impairment. Are dogs also colorblind?

If it is categorically said that dogs are colorblind, such a statement will inevitably be somewhat inaccurate, but if a dog's vision is measured by human standards, then the dog is colorblind.

There are only two types of cone cells in the retina of dogs, and the color of the world in their eyes is very monotonous compared to humans, because we humans have three types of cone cells in the retina, and can see all colors of light in the spectrum . In contrast, the colors that dogs can distinguish are very limited, so what does the world look like in the eyes of dogs?

In order to explore this question, scientists have gone through a series of experiments , finally solved the puzzle. In the eyes of dogs, in addition to black, white and dark gray, this world is mixed with red and yellow light with medium and long wavelengths and blue light with short wavelengths. Although it is not as colorful as the human world, it can also feel a certain color. Variety.

When God closes a door, he must also open a window. Although dogs have no way to appreciate the rich and beautiful colors in the eyes of humans, their vision in dim environments is far better than humans. This ability is also a powerful ability that they have evolved on the road to survival.

In fact, color blindness is not that important to dogs at all. All the abilities that animals have, the ultimate purpose is to survive. In dogs, the ability to distinguish so many fine colors may not be needed at all, and the dynamic vision and dark discrimination that are conducive to hunting may be more suitable for them.