The world is the same world, but from different visual angles, what you see will be different, and your understanding will be different. When people teach their pets to recognize a certain thing, it may think that it is a thousand miles away from the owner.

Human and dog visual differences

In response to light, the dog's eye different from the human eye. The human eye responds to the three primary colors (blue, green, and red) that give rise to various colors. Dr. Dennis Brooks, associate professor of ophthalmology at the University of Florida College of Veterinary Medicine, said that dogs vision is different from that of humans; dogs can't distinguish colors like humans, but dogs can see certain colors . Dogs can distinguish different shades of blue, indigo, and violet, but have no special sensitivity to high-chroma colors such as red and green in the spectrum. Dr. Brooks' research shows that red is dark to dogs and green is white to dogs, so green lawns appear to dogs as white grass.

Canine retina

The light receptor in a dog's eye -- the omentum -- contains a large number of columnar cells that help Dark vision and detection of moving objects. Another type of cell in the omentum is the cone cells, whose function is mainly to distinguish colors and distinguish subtleties. Dogs have an extra layer of choroid (tapetum lucidum) on their retinas that is highly reflective and can also increase a dog's night vision. Because light enters the eye, it will hit the photoreceptor on the omentum, but it may also miss and penetrate the omentum; but for pet dogs, because of the choroid layer, even if The missed light does not hit the light receptor and is still reflected back onto the retina, causing what is known as second vision. The choroid layer of the dog is also the reason why the dog's eyes appear yellow, green and red when the light is strong. A small number of dogs lack this layer of structure in their eyes, and the reason is still unknown.

Relationship between dog vision and breed

Short-nosed dog breeds such as Bull dogs ) can see a longer depth of field, while proboscis breeds (such as sheepdog) have a wider field of view. In addition, the shape of the dog's skull and the length of its nose can also affect its vision. It is generally believed that most dogs are slightly myopic. A few have farsightedness.

Eye Care Tips

If a foreign body is found in the dog's eyes, it should be sent to a veterinarian for treatment as soon as possible. Do not wipe it out with cotton swabs or fingers. , so as not to damage the eyes. In addition, you should seek medical attention as soon as possible when you find that your dog often scratches the eyes with claws, tears, blinks, red eyes, nebula, colored discharge, or protruding third eyelid. When traveling with a pet dog, pet dog should be prohibited from sticking its head out of the car to avoid serious damage to the eyes caused by the impact of insects. When using any product that contains alcohol (such as ear cleansers), you should absolutely avoid contact with your eyes. When bathing your dog, avoid the lotion foam getting into the eyes; when washing around the eyes, cover the eyes and keep the head slightly back to prevent the lotion from entering the eyes.   不同品种的狗狗，视力也有所差别。 The eyes of dogs are also prone to problems. Dog owners should pay more attention to the cleaning of the eyes of dogs to avoid infection!