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How do cats and dogs see? This question may have popped into your head on occasion. It is a question surrounded by great unknowns, but also the occasional myth, and that is that the popular belief that dogs see in black and white is totally false.
In this sense, what is true is that cats and dogs see humans differently . Without going any further, we perceive the world in great detail, while they do not have as much ability to focus on objects. In addition, it should be noted that both animals have a great advantage over us in terms of night vision. Did you know that they navigate better in the dark than we do? In fact, as nocturnal hunting animals, they have developed the sense of sight to a level up to five times greater than that of us. Amazing! In the case of cats, this advantage is given by a membrane that it has in the eye called tapetum lucidum, responsible for that brightness that you will have observed these animals have at night.
They also beat us when it comes to peripheral vision. This advantage is determined simply by the position of the eyes on your head. And it is that while humans have a field of vision that is around 200 degrees, that of our pets is considerably greater reaching 240.
Binocular vision refers to the ability to stitch two images into one. The brain receives signals from the outside through light impulses and it is in charge of interpreting them. In this sense, humans have a greater capacity to carry it out, since the binocular vision of dogs and cats is no less than half that of ours.
To better understand the function of sight in cats and dogs, we must first explain how this sense works in humans. While we are trichromats (that is, we perceive the three basic colors: blue, green and red and our brain combines them to give rise to the rest of the shades of the color palette), our pets are bichromats. This means that they are only able to distinguish two colors: blue and yellow.
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