Turn off the lights at night dogs can see, dogs have much better eyesight than humans, the dog’s night vision is five times that of humans, there is light in the dark, the dog can see more clearly than humans. However, if there is no light in the dark space, the dog is also invisible. Dogs have larger pupils than humans, which can collect more light, and there are many light-sensitive cells in the center of the dog’s retina, which can make adjustments in low-light conditions. Dog vision and human vision is different, dogs can not distinguish various colors like people, but dogs can distinguish shades of blue, indigo and purple, for the spectrum of red and green and other high color colors but no special perception.
