This is why we see the shiny dog and cat eyes in photographs and at night when headlights or other types of light enter the eyes. Cats can detect light that is 6 times dimmer than that which normal humans detect. Dogs and cats are also very sensitive to motion, especially when compared to an object that is not moving. Some dogs were shown to recognize a moving object at 800-900 meters. If the same object was stationary they only recognized it at 500 meters.
People are also more sensitive to motion than to objects that are standing still.
The horse can see about 350 around because their eyes are positioned to the side of the head as compared to dogs and cats. Humans have a smaller field because our eyes are directed straight ahead. In the binocular field depth perception is improved and vision is better. Dogs and cats have some binocular vision but not as much as people. Animal's senses of hearing and smell are so much better than ours that when an animal is in a familiar environment it is often hard to tell that it is blind.