I once thought, if a person has a pair of compound eyes, why do you like this sentence?

If humans have a pair of compound eyes, it will be safer to cross the road. Compound eyes are characterized by tens of thousands of single eyes, which mainly appear in arthropods such as insects and crustaceans, such as dragonflies and flies. Its advantage is that it can effectively calculate the orientation and distance between itself and the observed object, thus facilitating the compound-eye insects to make faster judgments and reactions.

Compound eyes consist of most small eyes. The facet of a compound eye is usually hexagonal. The number, size and shape of small eye surfaces of various insects vary greatly, and the compound eye of male scale insects consists of only a few round eyes. The compound eye of housefly consists of 4000 small eyes, and that of butterfly and moth has 28000 small eyes. The surface size of the eyelet is different not only in different kinds of insects, but also in different parts of the same compound eye. For example, the surface of the eyelet on the back of the male gadfly's compound eye is larger. Some mosquitoes can be divided into two areas because of the different sizes of their small eyes. These changes are related to their living habits.