Where is the dog market in Qingyuan?

At present, Qingyuan has a special dog market, but there is no market for pet dogs and meat dogs. Meat dogs are estimated to have only three birds market and Dragon Boat Pond to see; The pet dog has several shops in Zhongshan Park.

The lens of a dog is twice as thick as that of a human, and the adjustment ability of eyes is only 1/5~ 1/3 of that of a human. You can see clearly within 50m, but you can't see clearly beyond this distance, but the moving target can see 825m, with a wide field of vision. The left and right field of vision of one eye ranges from 100 to 65438. The lower field of vision is 30 ~ 60, and the object in front can be seen clearly. But because the dog's head is very flexible, it can basically "look at all directions with its eyes."

The dog can only see 25 degrees with one eye, so it can't see the nearest distance ahead. The lens of a dog's eyeball is relatively large and deformed like a horse's eyeball, so it is impossible to adjust the sense of distance. Twenty or thirty meters is probably its limit. Dogs have a special ability to detect moving objects; They can detect images that move 70 lines per second, while ordinary TV images move about 60 lines per second.

Dogs have better eyesight than people in dim light. Dogs are natural carnivores and live by hunting, so they also have considerable vision in the dark. Dogs' eyes can see short-wavelength colors. In addition, the dog's cornea is bigger, which allows more light to enter the eyes, so it is easier to see things in dim light.