Here's a breakdown of how dog vision compares to human vision:
* Humans: See a wide range of colors, including red, green, blue, and all the shades in between.
* Dogs: See primarily shades of blue and yellow, with some limited sensitivity to green. They struggle to distinguish reds and greens.
What does this mean for dogs?
* They can see some colors, but not all. While they can't appreciate the vibrant reds and oranges of a sunset, they can still see the blue of the sky and the yellow of a dandelion.
* Their world is likely less colorful than ours. Their vision is more akin to seeing the world in shades of blue, yellow, and gray.
* Their vision is more sensitive to movement and light changes. This is because their rods (light-sensitive cells in the retina) are more numerous than cones.
Why did dogs evolve this way?
Their dichromatic vision likely evolved for hunting and survival. They need to be able to see movement in low light conditions, and their sensitivity to blue and yellow could be advantageous for spotting prey against a blue sky or yellow grass.
In summary:
Dogs can see some colors, but their vision is different from ours. They see a more limited spectrum of colors, primarily shades of blue and yellow, but they are still able to distinguish objects and navigate their world effectively.