Why does the pupil of the eye look black?

The pupil (zenitsa) is a gap in the iris of the eyes through which light rays enter them. Man and other higher vertebrates change the size of the pupil reflexively (called the pupillary reaction), depending on the amount of light entering the retina. The black color of the pupils will indicate that all the light flux falling on it will be absorbed by the inner membrane of the eyes (namely, the pigment epithelium of the retinas of the eye). When they look out the window of a neighboring house during the day, they appear black. The light flux enters the room through the window and hardly comes back, the same thing happens with the eye.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.