How is the dog's vision? Dogs have lower vision than humans, but they also have certain vision. Their vision is about 20/75 to 20/100, while human vision is about 20/20 to 20/15.
Dogs can distinguish blue, indigo and purple in different shades, but they do not have special sensibility for high-color colors such as red and green in the spectrum. Red is dark for dogs, while green is white for dogs, so the green lawn looks like a white grass to the dogs.
Compared with humans, dogs have about three-quarters of their vision. Among all animal species, dogs’ vision is approximately average. However, dogs have special sensation capabilities for moving objects; dogs can detect pictures that move 70 lines per second, while general TV screen lines move about 60 lines per second. When the light is dim, dogs have better vision than humans. Dogs are natural carnivorous animals that survive by hunting, so they also have considerable vision in the dark. The dog's eyes can see short wavelength colors, so at sunrise or sunset, dogs can see clearly than humans. But in the darkness without light, the dog cannot see it. In addition, the dog's cornea is also larger, allowing more light to enter the eyes, so it is easier to see objects in dim light.
Dog vision is related to breeds
Baggy breeds (such as bulldogs) can see a longer depth of field, while
Baggy breeds (such as shepherds) have a wider field of view. In addition, the skull shape and length of the nose of the dog will also affect its vision. It is generally believed that most dogs have a slight myopia. A few have hyperopia; however, myopia and hyperopia are not of high degree.