Have you ever thought about how your dog perceives the world through his eyes? Is he also able to see the beautiful flowers on the field or the colorful toys that you have bought him?
The theory that dogs are colorblind has been alive for a very long time. Men thought that dogs only react to movement and can differentiate shadows from light. While dogs can see color, they are not able to recognize certain wavelengt
The Myth About Dog Color Blindness
Colors blindness is a condition first discovered in the late 18th century. Studies were mainly conducted on people and the most common defect was in the perception of red and green.
The myth that dogs can only see the world in black and white has been attributed to Will Judy. He assumed that dogs only experience their environment in various shades of black and white.
Researches thought that only mammals are capable of seeing color. Dogs are definitely not color blind but their capability of seeing color is different compared to humans or other animals.
Why Can Dogs Only See a Small Color Spectrum?
Before we can get to this question, we first have to understand the anatomy of a dog’s eye.
The most important aspect to color vision is the retina which is a tissue that lines the back of the inside eye. It consists of millions of cells that receive light and send it to the brain as a neutral signal. The cells are known as cones, rods and ganglion cells.
Cones perceive daylight and control the color and visual perception of the eye. Rods are able to catch movements and work best in low light. The ganglion cells receive and regulate visual information from photoreceptors.
The cones decide which colors animals and humans are able to see. Humans are trichromatic which means that we are able to see red, green and blue because of our three cones.
Dogs have more rods and only two cones (dichromatic) which makes them capable of only recognizing yellow and blue. We might have a better experience in daylight but their rod composition makes them excellent hunters in low light.
Dogs are nocturnal hunters, so their eyes are evolved to track and catch prey in low light environments. Their larger lenses, corneal surface and tapetum (reflective membrane) make it possible for them to hunt at night.
They register different lightwaves and decide which color spectrum we perceive. So dogs can only see yellow and blue which makes them colorblind to red and green, which appear grey or brown to them.
Do Dogs Only Rely on Movement?
Yes, dogs mostly
If a dog is enthusiastically chasing a yellow ball through the grass, he is mostly reacting to the movement of the toy rather then the yellow color against the green grass which both look grey to him. Quick movements really catch the attention of a dog better than anything else.
At night, your dog will be the first to detect a rabbit coming from the forest. As a hunter, smell, sound, and sight are most important to him, he doesn’t really care if the animal is pink, black or green.
They are capable of seeing motion so clear that they are able to watch TV with us. Yeah, that’s right, dogs do not only stare at the weird moving screen. They can even identify humans or other animals on the screen by vision and sound.
What Colors Can Dogs See?
This is how a dog experiences its environment compared to humans:
As I said, they are not capable of seeing green and red, so the red kong looks more like a grayish brown. That means that a dogs vision is similar to a person with severe red-green color blindness.
If you ever wondered why your dog loves the yellow tennis ball and is not very interested in the bright green toy that is the reason for it.
The next time you choose a toy, think about what would be more aesthetically pleasing for your dog so he will be much more engaged in it. Weird enough that most toys and dog gear comes in red, orange or green colors. If you toss a bright red toy into the field that you can easily see, your dog might not find it.
But humans are not on top of the chain when it comes to color perception, peacocks, for example, are able to see UV-light while a mantis has 12 kinds of cones.
Do Dogs See in the Dark?
Dogs can see in the dark way better than humans. Their night vision can be compared to that of a cat. While dogs can see very well in low light, complete darkness will leave them blind because of the way their eye’s anatomy.
So if you are leaving your dog alone during the late evening or night, consider turning a light on so he won’t be stuck in the darkness without seeing anything.
Can Dogs See in 3D?
Dogs do see their environment in 3 dimensions
There are many variations in the extent of the blind area due to different head shapes throughout the breeds. But the dog’s focus is not as well developed as in us humans because they simply don’t have to rely on it.
Conclusion: Can Dogs See Color?
Dogs can definitely see color which has been discovered not a long time ago. While humans can enjoy the full-color spectrum, a dog’s color vision is limited to blue, yellow and grey.
When you ask yourself if dogs are able to see color, think about a person with severe red-green color blindness. Dogs mainly rely on movement for hunting so their color perception is not as developed.