How do humans process sight?

The Brain can process things in a fraction of a second. For example. Lets say you touch a hot stove. The Receptors in the skin pick it up. Then it goes to the Sensory Neurons, to the inter neurons, the motor neurons. The motor neurons determine if its a threat or not. If it is then it goes to the spinal cord and then to the brain. The brain then controls the muscles in the arm and hand to pull away before the hand gets burnt and you pulled away without even thinking about it. It was controlledby the brain not you. Oh! and did i meanten that that all happened in a fraction of a second? its the same with the eyes. it didnt pick up the color change until the brain could process it. There are sensory neurons all over your body including the back of your eye, finger tips, nose, mouth, and ears. Ever wonder why a paper cut hurts so much? its because there are so many receptors in the finger tips. from the neurons it goes to the. . . . . *repeated*. . . . and into the brain. If the light turns yellow you get the signal to step on the break.

A message from the back of the eye is sent to the brain.

I don't know how it works exactly, but that's just what I learned so far.