When talking about the visual problems of dogs, many people think of the fact that dogs are red and green blind, and think that they cannot see the color and can only have high-end gray in their eyes. In fact, it is an incorrect idea, and the world...
When talking about the visual problems of dogs, many people think of the fact that dogs are red and green blind, and think that they cannot see the color and can only have high-end gray in their eyes. In fact, it is an incorrect idea, and the world of dogs is also colorful.
There is a clear scientific basis for this matter: dogs can indeed see colors, but they are not as rich and colorful as humans. Both human and dogs have unique light-catching somatic cells, called cones that reflect color. Dogs have fewer cones than humans, which means their color vision is not as colorful or obvious as people.
1. Dogs are considered pseudo-myopia, and the color identification is very vague for them. Most dogs rely on the sniffing and hearing systems to distinguish others or objects.
2. There are two colorful photoreceptors on the macula of the dog's eyes, or cone-shaped somatic cells, that can identify light sources with short wavelengths and medium-long wavelengths, that is, the colors of dark blue (short wavelengths) and red yellow (long wavelengths). Humans have three cone-shaped somatic cells that allow people to see all the colors in the visible spectrum. Since dogs can only have two types of cone-shaped somatic cells, there are no two colors that can be distinguished from red and green blind humans.
3. However, in order to obtain actual conditions, people must verify them based on experiments. Many people have tested dogs’ color vision in the past. After repeated trials, the dog was continuously displayed with three lamp panels, two of which were of the same color, while the third one was different. The daily task of a dog is to find a different piece, press the button, and choose the right one to get a snack reward.
After experimental biologists have made it clear that the world in dogs’ eyes includes black, white and gray, as well as long wavelength (green and yellow) and short wavelength (blue).
Try to confirm that dogs can indeed see colors, although they are less than humans, and they still have the problem of color casting with the colors seen by humans. The global foundation of dog color is yellow, dark blue and dark gray. They feel emerald green, yellow and orange are yellow, and blue-purple and dark blue are dark blue. The dark blue is considered dark gray.
So what are the practical significances of people understanding the color difference between dogs and people?
In fact, if the owner pays some attention, most common colors such as toys, necklaces, etc. that people buy for dogs, such as bright red and yellow. In the eyes of humans, this color is bright and eye-catching, and can be seen at a glance. But in the eyes of dogs, they may be dark brown-gray, or even gray-black, representing the bright color in your eyes, and they cannot be seen from the perspective of dogs.
The owner can choose small toys that can be more recognized by the dog based on the color of his wooden floor.
Feeding tips:
Although dogs have weak eyesight, they have strong English listening and taste, so they are never harmful to food, clothing, housing and transportation. To keep the dog healthy and physically healthy, the owner should pay attention to the dog's healthy diet. He does not have to give the dog too salty, nor does he have to give the dog a human meat. Because it is very easy to aggravate the dog's hair loss, tear marks and other problems, he can choose natural foods that match nutritionally.
