Why do animal eyes glow at night?

First of all, animal eyes can shine because the structure of animal eyes is different from that of human beings.

For example, we are familiar with a small animal, the cat.

Cats' eyes glow at night because they have special structures and substances.

Scientists believe that cat's eyes have some special substances that can reflect light, and it is because of this substance that cat's eyes can shine at night.

It is not the animal's own eyes that shine, but the light of other objects reflected by the animal.

Scientific explanation of animal eyes brightening at night;

Animals' eyes glow at night, and most of them are Nocturnal Animals, which is related to their retinal imaging.

1. As we all know, cats' eyes glow green at night, as do dogs, cows and horses. Many animals are like them, but some animals' eyes don't shine at night, which is related to animal retinal imaging.

2. Talk about the principle of animal eyes emitting light at night: when light passes through the retina, reaches the iris behind the eyeball, and then reflects to the retina for imaging again, the light reflected by the iris will still pass through the retina. Finally, there are different amounts of pigments in the retina, which will affect the color.