Dogs can see color

Recently, researchers have discovered that dogs can distinguish different shades of gray, as well as certain colors, especially blue and purple. Dr. Dennis Brooks, associate professor of ophthalmology at the University of Florida College of Veterinary Medicine, said: 'Dog vision is different from human vision; dogs cannot distinguish various colors like humans, but dogs can indeed see certain colors.
Dogs can distinguish different shades of blue, indigo and violet, but they have no special sensitivity to high-chroma colors such as red and green in the spectrum. Dr. Brooks's research shows that red appears to be dark to dogs, while green appears to be white to dogs, so a green lawn appears to a dog to be a piece of white grass.
For example:
The left side is the grass in the eyes of dogs, and the right side is the grass in the eyes of people.

The dog is myopic

Is it surprising? In fact, compared with us, dogs’ vision is relatively poor. To use data as an analogy, if a person's normal vision is 20/20, most dogs' vision is only 20/75. The following 20 and 75 represent distance, which means that a person with normal vision can see 75 feet away. Dogs have to be 20 feet away to see or see things clearly.
So the world in the eyes of dogs may look like this (of course, the colors are naturally different)

The special functions of dog eyes

Although they are different from those of humans Vision In comparison, dogs’ vision is indeed not very good.
But at the same time 1. Dogs have special detection capabilities for moving objects
(For example: dogs can detect a picture moving 70 lines per second, while the movement of lines on a general TV picture About 60 per second.)
2. When the light is dim, because the dog’s cornea is larger and allows more light to enter the eye, the dog’s vision is better than that of humans
3. Dogs’ eyes can see short-wavelength colors, so dogs can see more clearly than humans at sunrise or sunset.
These are the special features of dog eyes