Are dogs color blind?

Compared to humans, dogs are color blind, but it does not mean that dogs cannot see colors, let alone dogs rumored on the Internet Only black and white can be seen. At present, it has been verified through experiments by scientists that dogs can see blue, yellow and gray.
In 1995, the American Veterinary Medical Association confirmed through experiments that the dog’s retina has many types of cone cells (an important feature of the function of this cell is its ability to distinguish colors). Therefore, what everyone once mistakenly believed was the world of dogs. The black and white statement is wrong.

Compared to humans, dogs can indeed only see part of the light. They cannot distinguish various colors. From this perspective, it is not wrong to say that they are color blind. of. The structure of the dog's retina is different from that of humans. There are only two types of cone cells in their retina, so they can feel very few light waves. In the eyes of dogs, the colors they can perceive are very monotonous. of.

Comparison chart of the colors seen by dogs and the colors seen by humans

What about guide dogs? Distinguish colors

So some people may have another question, how do guide dogs distinguish traffic lights and lead blind people to cross the road? In fact, this is because the brightness caused by the red light and green light beams is different. Regarding the shade of gray, after a certain amount of training, guide dogs can very sensitively observe changes in brightness.

Colors that dogs can see

Through the comparison chart, we can see that dogs can clearly see blue, but purple is the most recognized color in their eyes. It is also blue. In their eyes, red colors are recognized as dark gray and black, and blue-green colors are recognized as gray. Orange, yellow, and green are the blind spots of dogs’ vision. It is difficult for dogs to distinguish because It all looks the same to them.
In addition, dogs also have a large number of rod-shaped cells in their omentum. These cells can distinguish grays as long as there is weak light. Therefore, researchers believe that dogs can distinguish grays that humans cannot distinguish. This is why dogs Dogs have better night vision than humans.
Summary:
The colors dogs can see are mainly yellow, blue, and gray.