Contrary to popular belief, dogs don’t see the world in black and white! Humans see the world in color because we usually have three types of color receptor cells or cones in our eyes which are sensitive individually to red, green, and blue light. Dogs’ eyes, however, contain just two kinds of cones. These cones enable their brains to distinguish blue from yellow, but not red from green. In other words, dogs see the colors of the world as basically yellow, blue and gray.
One odd fact though is that most popular colors for dog toys today are red and orange. These colors are very difficult for dogs to see and they may appear as a very dark brownish gray or perhaps even a black. So if your dog runs right past the red toy that you tossed, he may not be stubborn or stupid. He just finds it hard to discriminate the red ball from the green grass of your lawn. If you are planning to buy toys for your pup, make sure they are yellow or blue.
Aside from being colorblind, dogs also tend to be nearsighted to varying degrees but that doesn’t mean that their vision is inferior to humans. Dogs are much more sensitive to motion at a distance — anywhere from 10 to 20 times more sensitive than humans and they can see better in the dark. They also have a wider degree of peripheral vision making them perfectly suited for hunting down a fast-moving prey.