Everyone may have this feeling, that is, the dog can find the owner from a long distance and run to him, and the guide dog can also help the blind avoid many road dangers smoothly, so we all think that the eyesight of a dog is better than that of a dog. We humans are much better, is that true?
A dog’s vision is only 1/5 or 1/3 that of a human, because the dog’s intraocular lens is twice as thick as a human’s.
Dogs are myopic!
Daytime vision
In a static state, the dog can only see objects within 50 meters, even if it is an object in front of the dog, the dog is smelling and approaching, adjusting the eyes The ability of a dog is only 1/5 of that of a human, but if it is a dynamic target, the dog’s eye vision can reach 1000 meters, and the dog’s farsightedness far exceeds that of the human. Although the dog has poor eyesight, the dog’s visual field width can reach 200 meters. °-250°, human beings only have 180°, which is not a good idea for dogs!
Night vision
In the dark, dogs can see much better than during the day.
The light receptor in a dog’s eye — the omentum — contains a large number of columnar cells that help with 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 choroid layer (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 retina, but it may also miss and penetrate the retina; but for dogs, because of the choroid layer, even if the light Missing unimpeded light receptors are 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.
The world of dogs is black, white and gray
Dogs have poor discrimination of brightness, and can only distinguish the intensity of brightness through the depth of color.
Dogs can distinguish different shades of gray, as well as certain colors, such as blue and purple.
Dogs are not only myopic but also colorblind!
Dogs are colorblind and cannot distinguish between red and green. To dogs, red is a dark color, while the green grass is a vast white area in the eyes of dogs, so when dogs run and chase on green grass, In its eyes, it is a vast white prairie.
Since I already know that the dog’s eyesight is so poor, the owner must protect the dog’s eyes in daily care, because it really can’t hurt~~
1. Choose a dog shower gel It is non-irritating to the eyes. If the lotion accidentally gets into the dog’s eyes, it should be washed with warm water immediately. You can use a cotton swab to wipe the foreign body and secretion in the eyes. If the dog’s eyes are red, don’t let the dog’s paws scratch. The eye drops
can be cleaned, and if you find it serious, you should go to the veterinarian for treatment immediately.
2. Do not use strong light to stimulate the dog’s eyes. Strong light will damage the retina and easily cause eye diseases, such as glaucoma, so pay more attention to supplementing the body’s nutrition every day.
3. Pay attention to rest when exercising and avoid contact with dangerous sharp-edged things. Accidental injury to the eyes may easily lead to retinal detachment or other problems.
The dog’s world is only black, white and gray, very monotonous. The only color is you. Please cherish and care for your dog, because their life is only you!
