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How do dogs see? - All about the sense of sight of the dog

How do dogs see? - All about the sense of sight of the dog

The canine vision is a question that generates a lot of curiosity and expectation among dog tutors.Formerly it was believed that dogs saw only black and white, however, recent studies [1] point out that dogs have color vision , although it should be noted that it is more limited than what we humans possess.

Apart from banishing false myths, in this article we will solve many doubts related to the sense of sight of the dog , explaining how dogs see at night, how dogs see colors or what factors influence the sense of sight of the dog, from puppy to adult stage.To answer all these questions, In Animals and Pets Online we have created this post, based on scientific studies, which addresses this issue in detail, par to help you better understand how dogs see , the colors, their abilities and other curiosities, such as the evolution of their vision.Continue reading!

When do dogs begin to see?

Have you ever wondered how puppies see ? The dog is a altricial species [2], a zoology term that is used to designate those offspring that are born totally blind and without hair, who also depend completely on their progenitor to achieve their survival.

The dog, as an altricial breeding, is born blind and is totally dependent on his mother, who will ensure all the necessary care to develop until he can feed and survive on his own.It is around three weeks old when he begins to open his eyes and see.Later, about five weeks old, the puppy has fully developed peripheral vision.It is considered that between five and seven weeks of age already We can start training the puppy, since it is already more independent of the mother and most of its senses are developed.

Do not forget to educate him in an environment with few stimuli, since in this way the dog does not will get distracted and learn faster.reach three months of life , the puppy already looks just like an adult dog .

How do dogs see? - All about the sense of sight of the dog

Do dogs see black and white or color?

Surely you've ever been assured that dogs see in black and white .What is true about it? The truth is that dogs do not see colors just like us, humans, but the claim that they see in black and white is a myth .

How do the dogs the colors?

The cones, the cells of the eye's retina, allow the dog to perceive different colors [1] thanks to the light.While humans have high sensitivity to three different colors: red, blue and green (trichromatic vision), dogs are only sensitive to two colors: blue and yellow ( dichromatic vision ).[4] [5]

Do you want to know how dogs see colors? Also discover in Animals and Pets Online the colors that dogs see according to several scientific studies, you will be surprised to see that they are not able to differentiate red from green, as well as many other curiosities of canine vision and colors.

Below, we show you an image with a example of canine vision :

How do dogs see? - All about the sense of sight of the dog

How do dogs see at night? Do they see in the dark?

Of course! Dogs can see in the dark and it is one of the most important characteristics they possess, so they are great night hunters .In fact, the perception of movement together at the differentiation of luminosity they seem to be the basis of canine vision.[6]

The pupil of the dog has a great capacity for expansion and that allows him, the lighter the light, the more stimulation receive the retina.In the retina we find the reflecting cells that form a layer of tissue called tapetum lucidum , characteristic of nocturnal mammals.Perhaps you have ever wondered why the dog's eyes glow in the dark, it is precisely because to this reflective fabric.We humans do not possess it.Of course, in total darkness the dog will not be able to see anything, since requires some light , however, if it is dim will be enough to stimulate these cells.

Does the dog look good from afar?

The dog manages to distinguish objects about 6 meters away , unlike a person, who reaches up to 25 meters.This capacity depends essentially on the cornea and lens, and is that the lens of the dog itself, as with humans, may be better or worse.

Some dogs suffer from myopia and others farsightedness The Labrador Retriever, for example, is one of the races known for having a better view, while the German shepherd or the Rottweiler tend to suffer from myopia.

How do dogs see? - All about the sense of sight of the dog

How do dogs see people?

It is not easy to know how dogs see their owners.They spend most of the day observing the world around them and seeing their beloved family.Their vision is very different from ours, so , the dog does not see the same way we see him.

The vision of the dog and the way he sees the world depends on several factors:

  • Ability to measure distances (visual field and depth perception): the position of the eyes on the animal's head determines the peripheral vision and the amount of visual field that can be observed with both eyes.It is known as vision binocular.This allows you to see in depth and correctly measure distances.The field of vision of dogs is 240º, while ours is 200º.Conversely, the binocular vision of humans is superior to that of the dog.
  • Ability to focus on objects (visual acuity): this ability allows you to focus on different objects and diff erenciar one from another.The cornea and the lens are primarily responsible for this ability.
  • Perception of movement : dogs have a vision very sensitive to movement.There are even studies that reveal that they can detect moving objects or animals up to 800 meters.
  • The differentiation of colors : the cones are the cells that are in the retina, which determine the perception of colors, provided they are stimulated by the light of the different wavelengths.

How do dogs watch TV?

Unlike humans, dogs do not interact with the environment using only manipulation and vision, they prefer to use the sense of smell to obtain information from the environment.[3] As a result, many owners wonder how dogs watch television, well, the truth is that dogs do not enjoy watching a movie or mobile phone notifications, since the frequency of hertz (Hz) is adapted to the human vision, not canine vision.

Currently, and as an extra tool for some behavioral problems, such as separation anxiety, television channels have been developed only for dogs, such as DogTv.

How do dogs see? - All about the sense of sight of the dog

Other curiosities about canine sight

Next, we will review some curiosities related to the vision of the dog :

  • The dog is not able to see more than half ground meter, and some smaller races barely see a few centimeters.For example, a Beijing has a much smaller visual range than a newfoundland.
  • Another interesting fact is that visual memory of the dog is not as good as ours, he prefers to remember through the senses of hearing and smell.
  • Why don't dogs look at each other? in the mirrors? Did you wonder? The truth is that the dog manages to see its image reflected in the mirror, but the first few times they are not able to recognize each other, so they tend to attack, run away or bark.
  • It is also common to wonder if dogs see spirits.It is very common to think about it if we look at the dog looking at the dog.empty or bark at "nothing." So much so that many people wonder if their dogs have paranormal abilities and if it is true that dogs see spirits.We can never really know.

incredible abilities of dogs are mainly due to their developed sense of smell, which allows even to detect survivors in catastrophic scenarios.The vision of the dog is very different from ours, but it is perfectly adequate for the needs of the species.

Have you been wanting more? Maybe you are interested in discovering how horses see or how cats see, find all the information in Animals and Pets Online!

How do dogs see? - All about the sense of sight of the dog

If you want to read more articles similar to How do dogs see? , we recommend that you enter our section Curiosities of the animal world.

References

Kelber A., ​​Vorobyev M., Osorio D., Animal color vision-behavioral tests and physiological concepts Biological Reviews 1 March 2003 Dr.Jay S.Rosenblatt., Olfaction mediates developmental transition in the altricial newborn of selected species of mammals Wiley Online Library September 1983Alexandra Horowitz- Inside of a Dog: What Dogs See, Smell, and Know Neitz J., Geist T., Jacobs GH, Color vision in the dog Visual Neuroscience 1 June 2009Jacobs GH, Deegan JF, Crognal e M.A., Fenwick J.A., Photopigments of dogs and foxes and their implications for canid vision Visual Neuroscience 1 June 2009R.L.Worfold Canine Optics Wiley Online Library June 1965
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