How limited is a dog's vision?
Are their eyes really so bad?
Dog Vision
Many people think that dogs see in just a plain black, white, and gray world. Some say dogs see things really blurry. But all of those are false.
Humans vs. Dogs
Humans have 3 color-detecting cells called cones. With them, humans can distinguish blue from yellow, and red from green. However, dogs only have 2 cones. So dogs can distinguish
blue from yellow, but not red from green.
Color Spectrums
The top line shows the colors that dogs cans see. The bottom shows the colors visible to humans.
Dog Vision
The left shows a humans vision and the right shows a dogs vision.
Eyes view
The left shows the area view that a human can see. The right shows the area view that a dog can see.
Dog Sight
It can be inferred that dogs have very unremarkable vision due to only a 60* angle in eye area and colorblindness to some colors, but there eye sight is way more significant than humans in certain places. A dog can quickly spot a moving target at a distance about 10-20 times better than a human can.
Conclusion
Despite many disadvantages a dog has in eye sight, the advantages are still way better. A dogs eye has a really strong muscle system, although a dog's nose and ears are more superior than a human's, the dog's eyes are still the most important organ in it's body.