: When we look at an object in a corner, light from the object is refracted by the eye lens and forms a reflection in the retina. From the retina to the nerves in the brain, they are rods and angles. Which of the following is sensitive? There are three types. Blue color sensitive angle , red color sensitive angle and green color sensitive angle. No matter how mixed or complex a letter is, the eye contains all the letters in these three letters only. The retina sends this stored information to the brain. The brain again separates all the characters through a special process. In this way we get the supernatural perception of colored objects.