Labrador Retriever

There is no need to say more about dogs’ senses. Compared to people, their sensory systems must be developed. There are too many, and the hearing is also quite good. Because these two excellent abilities allow dogs to complete many tasks well, however, dogs’ vision is not as good as the first two, and dogs are color blind as if they were geniuses. So why are dogs color blind? This is because dogs have fewer cones in their retinas, so the world in their eyes is not as colorful as what we can see.

Due to the special structure of the dog's eyes, the colors it can distinguish are the same as those that can be distinguished by patients with red-green color blindness. Scientists have illuminated the dog's eyes with a beam of colored light, which will produce an image reflected directly from the dog's eyes. The scientists studied this reflected image and then compared it with the image reflected directly from the human eye by the same kind of light. About than.

Some people may ask why the guide dog’s inference about traffic lights is very correct. It turns out that guide dogs can distinguish between traffic lights not because of the judgment of the color, but by the brightness of the two lights. Research has found that dogs have very little ability to distinguish between shades of gray. With this ability, they can distinguish changes in light and shade on objects and create a three-dimensional visual image. Although a dog cannot see red or green, it can infer the different shades of gray in its eyes.

This is why dogs are color blind. However, dogs’ poor vision does not affect them. Their hearing and feeling can make up for this deficiency, but the world in their eyes It's not that colorful, it seems a little sad.

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