Dogs and cats differ from people in terms of what they can see. Dogs are often described as being color blind, but they don’t live in a black and white world. They just can’t distinguish between shades of green, just like many “color blind” people. Cats, on the other hand, see all of the colors that most people see, but their color vision doesn’t seem to be as rich as people’s color vision. Cats and dogs are able to see better in low light than people, but this is at the expense of their visual acuity. While a person with normal vision has 20/20 vision acuity (they can differentiate objects at 20 feet away that others can see at 20 feet away as well), dogs have 20/75 vision (they see at 20 feet away what a person could see at 75 feet away) and cats have 20/100 to 20/200 vision.