The idea is widely held that dogs see black and white. However, scientists are formal: even if they are not as well equipped as us, our four-legged friends distinguish certain colors.
The time has come to definitely take your mind off the idea that dogs see the world in black and white. Certainly, their visual abilities are more limited than ours. But they are still able to distinguish colors. Or at least, some of them.
Let us first remember that the perception that we have of images is constructed from photoreceptors that focus on our retina. Those in the shape of sticks allow us to perceive the light, those shaped like cones, to distinguish colors. So our perception of colors is a function of these photoreceptors and the interpretation that our brain.
The vision of the dog
The way we see the world is not limited to the way we manage to distinguish colors. So, note that dogs are short-sighted by nature. And some breeds, like the German shepherd, more than others. They also find it difficult to judge distances accurately. On the other hand, dogs perceive better movements only men. They record 50 images per second while we only perceive 20. An aptitude useful to predators that they are. Their field of view is also wider than ours. It spans 240 ° against 180 ° for us.
In terms of colors, note that the dog, like most mammals – and even some humans -, is duotone. This means that he does not have on his retina than two types of cones. Thus the dogs clearly distinguish yellow and blue. But they have more trouble with red. And the colors they see are generally duller than the ones we see.
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