Why do cats' eyes glow at night?

Eyes are the most obvious feature of cats.

The eye structure of cats is very similar to that of human eyes, and the fundus is sclera, choroid, photo film and retina from outside to inside. Cats' eyes glow, mainly because of the tapestry.

It is said that cats are night owls, so in order to adapt to the late night living environment, cats' night vision ability should of course be maximized. At night, when there is more blue light in the background, the cat will change the incident wavelength by using photo film to turn the dark environment into a bright state. This can distinguish the prey from the environment and is conducive to hunting.

This part of the blue-green light reflected by photographic film is easy for human eyes to see, forming the so-called "cat's eyes will glow" situation.

Duan Liyang Kato, a cat behavior expert, also said, "This is because there is a layer of cells behind the retina of cats, which can reflect the light that penetrates the retina back. When these reflected lights return to the retina again, the visual nerve is stimulated again. " In this way, the cat's eye can see more clearly. In our eyes, it is the cat's eye that flashes strange green light and golden light.

This gift is not unique to cats. Most Nocturnal Animals have this function, such as dogs, horses, lizards and lemurs.

By the way, under popular science, cats can see things clearly in a relatively dark environment only by 1/6 light needed by human eyes. Coupled with keen hearing and touch, cats' ability to hunt at night is really excellent er~~~