Can dogs see things at night? We may all know that dogs do not have a high resolution for color. The color of the world they see is different from that of human beings. The light at night is not enough. We will worry about whether dogs can see things at night. Dogs can see things at night, but they are not as clear as in the day. Pet net is small Compiled to find some foreign veterinary experts on the dog's vision related information, you can learn about it.
Can dogs see things at night? How about their eyesight
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The difference of vision between human and dog lies in the reaction to light, the dog eye is different from the human eye. The human eye responds to the three primary colors (blue, yellow, and red) that cause various colors. Dr. Dennis Brooks, an associate professor of Ophthalmology at the University of Florida veterinary college, said: dog vision is different from human vision; dogs can't distinguish different colors like humans, but dogs can see some colors. Dogs can distinguish blue, indigo and purple in different depths, but they have no special sensitivity to high color colors such as red and green in the spectrum. Dr. Brooks's research shows that red is dark for dogs, while green is white for dogs, so a green lawn is white to dogs.
The retina of a dog the light receptor in a dog's eye, the retina, contains a large number of rod-shaped cells that help to see in the dark and detect moving objects. Another type of cell in the retina is the optic vertebrate cell. The function of the vertebrate cell is to distinguish the color and the tiny place. There is an extra layer of tapetum lucidum on the retina, which is strongly reflective and can also increase the dog's night vision. Because the light enters the eye, it will hit the photoreceptor on the retina, but it may also miss and pass through the retina; however, for dogs, due to the choroid layer, even if the light does not hit the light receptor, it will still reflect back to the retina, resulting in the so-called second vision. The choroid layer of the dog is also the reason why the dog's eyes appear yellow, green, red and so on in strong light. There are a few dogs whose eyes lack this structure, but the reason is still unknown.
The relationship between visual acuity and varieties
Short nosed breeds (such as Bulldogs) can see longer depth of field, while long nosed breeds (such as shepherd dogs) 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 hyperopia, but the degree of myopia and hyperopia are both basal.
. In addition, if you find that you often scratch your eyes, shed tears, blink, red eyes, blurred eyes, colored secretions, or protruding third eyelids, you should seek medical advice as soon as possible. When carrying your dog on the bus, you should forbid the dog to put its head out of the car, so as to avoid serious injury to the eyes caused by the impact of insects. When using any product containing alcohol (such as ear cleaner), avoid touching the eyes. When taking a bath for dogs, avoid lotion bubbles entering the eyes. When you wash your eyes, you can use Erythromycin Eye Ointment to cover your eyes and put your head back slightly to prevent the lotion from entering your eyes. In case the lotion enters the eye, use a large amount of sterile physiological salt water to rinse, and see a doctor if necessary.
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