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How dogs see colors and shapes, what they can perceive in the dark, how they perceive movements. There are many false legends that also give rise to misunderstandings between us and our faithful four legs, better to deepen putting himself in their eyes, also to imagine the life they have and how ours is from their point of view.
How dogs see at night
To understand How dogs see at night it should be taken a step back, remembering that in general, not only a beautiful dog, the retina is formed by rods, for twilight vision, and by the cones, for daytime vision. In the case of the dog, then, since the former are much more numerous than the latter, then the sight during the twilight hours is much more effective than when the sun shines high in the sky, in the middle of the day.
Similarly it happens in other mammals, we are we men who have more cones than rods, which is why we prefer to work in sunlight rather than in low light areas.
How dogs see colors
Thanks to the studies of Gordon Walls, sight and eye expert, today we can know that all the animals with rods in a semi-diurnal environment can see all those colors present in nature. This also applies to the dog but, because of the imbalance between cones and rods, it should be taken into account that when the light is very strong, the colors are more blurred. A bit like when we put an artificial filter on the photographs to obtain a pastel effect.
This is a far cry from what many have tried to argue for years, namely that dogs saw the world in black and white. This is not the case at all. They suffer a pastel effect during the day in full light and they do not always see the colors in "high definition", but they have many visual abilities that are to be envied.
Thanks to the presence of a back film, the "Tapetum lucidum" , dogs are able to focus on shapes even in the dark, making the most of the light that can reach them. Less than cats, but looking closely, you can see it, dogs have a certain luminescence in their eyes.
How purebred dogs see
How do dogs see, it also depends on the breed. There are no dogs predisposed to blindness, that is not, but the parameter of sight that can change passing from one breed to another is what concerns the width of the visual field, always in general much greater than that of humans.
Let's see How hunting dogs see: very well, I would say, or rather they have broad views since Italian hounds or greyhounds cover about 270 °, other breeds with less refined snouts, more suitable for being pets, stop at 250 °, and then move on to 180 ° if you measure the visual field width of dogs like i Pugs, with the muzzle extremely flattened.
The "rule" on How dogs see in degrees of amplitude, is that the more the muzzle is elongated and flattened, the more degrees they see, always taking into account that the binocular vision it is less developed.
How puppy dogs see
The dog sees quite well from an early age and, if we are dealing with a puppy, we will immediately notice his special sensitivity in detecting movements. In fact, even if they are close to a person or an immobile thing, it can happen that dogs do not pay attention to them until they feel a movement. On the contrary, even if very distant places, if objects move, dogs perceive them much earlier than we do.
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