When we look around, we see several shades of colors and hundreds of thousands of images. Human beings, and several animals, are able to see images when light enters the eye and releases an electrical signal through our the nerves to the brain. These signals are then transformed into the images, or pictures, that we see. Dogs, because of their hunting needs, see twice as much as do human beings. In addition, dogs have an outstanding ability to follow movement and to perceive direction, speed, and trajectory.
Trajectory is what gives dogs the innate ability to plot an angle and predict an angle of movement.
For example, dogs have an astonishing ability to know the exact spot where a moving object will land and know from which angle it will be coming. Cats, on the other hand, have a different reason for being such good jumpers. Cats faces are flat between the eyes, a rare feature in the animal world, which makes it easier for them to work together. As a result, a cat can focus sharply and three-dimensionally, an ability that allows it to visually judge distances with great accuracy before jumping. Their eyes are located on the sides of their head, which enables them to see in all directions.