Why with my eyes closed we can see any patterns
Try to see the darkness, narrowing his eyes. Most likely you will fail. Most people in this position see strange patches of light colored spots, changing patterns. It's time to wonder what is happening and why.
Color vision as a result of the interaction of eyes and brain
People have the ability to distinguish colors due to the special device of the fundus, which is covered by the retina. It consists of small cones of different types. Each type of cone is focused on a specific color. Some are responsible for the perception of a red spectrum, others blue, others green.
How to detect the result of brain activity
Evolution has endowed man with the ability to distinguish colors under different conditions. Additional "settings" on the part of the brain facilitate the task. Separate areas of the retina are involved in the regulatory process. With open eyes we do not even notice the change. However, the result of brain activity is easy to detect, closing his eyes.
Is there any reason for concern
Colorful reflections with closed eyes in one way or another is characteristic of all people. Sensitive nature trying to find hidden meaning in a chaotic pattern. It is important to understand the relationship between the negative of the real picture. This concern can serve as colored spots, which have nothing to do with the previously considered object. Often this is a spasm of blood vessels of the organs of vision or of the brain.