Dogs have highly developed senses. However, this is not the case with sight. Although canines have a larger field of vision than ours, precision is not there. How do dogs see? What are the most common eye conditions? Here’s everything you need to know about dog vision.
The sight of dogs: different capacities of men
A wide visual field
Unlike men who have their eyes on the facial part of their face, dogs have their eyes placed sideways. Finally, more laterally than us! This particularity comes from the fact that their head does not have the same morphology as ours. The dog’s visual field is therefore wider. That of men is 180 °, that of dogs can reach 280 °. Canines therefore have a greater ability to spot movements in their environment, whether natural or not. The field of vision of dogs makes them excellent hunting or playing partners. It should be noted that unlike the visual field, depth perception is reduced in dogs. It is between 80 ° and 100 ° against 140 ° in humans.
The dog is naturally short-sighted
It may surprise you, but dogs are naturally short-sighted. In other words, he does not see correctly what is far from him. His visual acuity is 5 to 6 times lower than ours. Some dog breeds have very poor eyesight. Why such a difference ? Quite simply because the eyes of the dog are not made like the eyes of the man. In dogs, there is an absence of fovea on the dog’s retina. At the same time, there are fewer nerve fibers in the optic nerve of canines. Of course, there is no way to correct dogs’ eyesight. It is hardly except in cartoons that they wear glasses!
Colors seen differently
We have just seen that dogs had a larger field of vision than ours, but weaker visual acuity. What about the colors? You should know that contrary to popular belief, the dog does not see in black and white. However, it is dichromate whereas we are normally trichromates. Dogs see in color, but not all of them! They see yellow, blue and purple but cannot distinguish red and orange. In addition, the dog does not distinguish green from white. It should also be noted that dogs perceive colors more clearly.
Vision loss in dogs
Signs of vision loss in dogs
Vision disturbances and vision loss in dogs can occur with age or due to illness. Some signs should alert you, here they are.
- Your dog bumps and above all, he bumps where he did not before. It is possible that it stumbles on a piece of furniture or a person.
- Your dog is less active. While he loved walks, he prefers to stay at home in his basket.
- Your dog is hesitant when he was previously fiery and full of energy.
- Your dog is no longer playing.
- Your dog jumps when you approach him.
If you notice one or more of these signs, it is highly recommended that you make an appointment with the vet so that your dog’s eyesight is checked.
Causes of vision loss in dogs
Vision loss in dogs can be caused by an incident. It is possible that your companion was injured or fought. Although this incident is regrettable, be aware that it most often affects only one eye. the animal is therefore not blind. If the injury is not serious, there may be sequelae but it is also possible that the dog will recover and recover his visual abilities. If you notice that your dog is injured in the eye, you should go to the vet. The latter can rinse the wound and prescribe an appropriate treatment.
Vision loss can also be linked to a disease like cataracts. It can also affect men. In dogs, it occurs from the age of 7 years. It is recognizable by the blue reflections that appear. The dog’s sight is cloudy. The more the disease progresses, the more the dog loses its visual capacities. It is possible to operate on a dog for cataracts as long as they are not too old.Glaucoma is another disease that can affect older dogs. It also causes loss of vision.
Some dog breeds are particularly affected by retinal detachment, such as the Collie, and if the condition is diagnosed and treated early, your dog will be able to maintain good eyesight for as long as possible. Progressive retinal atrophy is a disease that develops especially in Cockers, Terriers and Poodles. It causes blindness. Finally, vision loss in dogs can be caused by an eye tumor. If it is small, surgery may be considered.
A dog’s sight is very different from ours. However, the canine compensates with its other senses. If you notice that your dog sees less well, do not hesitate to make an appointment with your veterinarian.