Here's a breakdown:
Dogs have better:
* Night vision: Dogs have a higher concentration of rod cells in their retinas, making them more sensitive to low light. They can see in conditions humans would consider pitch black.
* Motion detection: Dogs have a larger field of vision and their eyes can track movement more quickly. This is helpful for hunting and other activities.
* Peripheral vision: Dogs see a broader range of side vision than humans. This helps them be aware of their surroundings.
Humans have better:
* Color vision: Humans can see a wider range of colors than dogs. Dogs see mainly blues and yellows, while humans can perceive the entire visible spectrum.
* Detail vision: Humans have a higher density of cone cells in their retinas, which allows us to see fine details more clearly. This is important for tasks like reading or driving.
* Depth perception: Humans have better depth perception than dogs, due to the positioning of our eyes. This is critical for tasks like navigating stairs or playing catch.
So, it depends on what you mean by "better." Dogs are better at seeing in the dark and detecting movement, while humans have better color vision and detail perception. Both species have evolved different visual capabilities that suit their specific needs.