In the 18th century, the famous British scientist Dalton first discovered color blindness, and he himself became the first person confirmed to have 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 color blind?

If we categorically say that dogs are color blind, this statement is inevitably somewhat inaccurate, but if we measure the dog's vision by human standards, then the dog is color blind.

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

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

When God closes a door, he must open a window. Although dogs cannot appreciate the many rich and beautiful colors in human eyes, their vision in dim environments is far better than that of humans. This ability is also a powerful ability they have evolved on the road to survival.

In fact, color blindness or not is not that important to dogs at all. The ultimate goal of all abilities possessed by animals is to survive. In dogs, the ability to distinguish so many fine colors may not be needed at all. Dynamic vision and the ability to distinguish objects in the dark, which are beneficial to hunting, may be more suitable for them.