Published 2016-12-30
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8 amazing photos that show us the difference between the visions of animals and humans

It is said that one should not judge the other before seeing the world from their perspective. However, that is always not an easy task and that is why we present this article to help you. Have you ever stopped to think how the world sees other beings around us? It is clear that the sense of sight is not identical in the case of different species because the circumstances and the environment that surround each being are different and require other things. To give a fairly obvious example: human sight is useless for example under water and at great depths. In such an environment other species have qualities of sight that are required that we do not possess. The different studies show that some animals can see many more things that humans can not.

1. Snakes

Snakes do not see colors, but they have an incredible perception of light (it has highly developed eye cells called cones, which are responsible for differentiating the different degrees of black and white). In addition, they have receptors that sense the temperature. The sight is not the main sense of the snake since it uses the senses of its nose and ears when hunting. It is very difficult for a snake to see objects that do not move.

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2. Birds

Unlike snakes, sight is the most important meaning in the case of birds. A good view is essential to be able to make safe flights, form flocks in the air or escape from the enemy. Therefore, this group of animals has developed improvements that allow seeing much better than the group of vertebrates. To give an example of what a bird's sight is: the dove is often referred to as "two winged eyes" (the dove has a range of view of 340 degrees, where the remaining 20 are simply the width of its head by front and back). Birds can change the shape of the lens quickly thanks to the ciliary muscles, allowing them to adapt their eyesight to different lengths instantly.

As if that were not enough, birds can see ultraviolet light, something that humans can not do. They need this type of vision in order to locate the predators or their potential mate. Below you have an example of the vision of birds compared to that of a human.

3. Dogs

There is a myth that is related to the sight of dogs which is completely false. It is often said that dogs can only see black and white. Although it is true that the sight of dogs is not as well developed as that of humans in terms of color differentiation, but it must be said that they are able to see and recognize some colors. The difference between our eyes and those of dogs is that in our eyes we have three types of receptors that recognize red, green and blue light. A proper mix of these three allows us to see everything that each of us sees each day. In the case of a dog, his sight looks much more like that of a human with red-green color blindness, although differences remain.

Briefly, dogs are able to detect the colors blue, brown and yellow, which makes them look similar to what you can see below. However, compared to us, dogs have a wider peripheral vision. In addition, dogs are much less sensitive to shades of gray and changes in brightness.

4. Fish

As we mentioned in the beginning of the article, the environment in which fish operate is very different from ours and therefore the view has to have developed other functions and receptors in comparison to the human eye. It is obvious that the seas and oceans are extensive and depending on the habitat of one species or another, there will be differences. However, the eyes of many fish resemble human eyes and have both cones and sticks that allow them to differentiate colors and shades of gray. Some fish can see ultraviolet light and others, those who live in great depths and where light does not reach, are very sensitive to brightness.

Fish can detect red, green and blue colors. However, unlike humans, fish adjust the view by moving the lens closer or closer to the retina. Also, the fish have no eyelids. As you can see in the picture, the famous fisheye effect comes from how fish really sees.

5. Rats

The world of rats is very blurry. We are not just talking about the fact that they usually lead very unhappy lives and are almost always exterminated because no one wants them at home. It is also that their sight is simply very blurred. In return, they have a great depth of focus. The depth of focus is the range of distances in which objects remain in an identical focus in the case of a unaccommodated eye. A fun fact is that some scientists tried to find out if it was possible to improve the view of the rats with the help of glasses. The answer is NO.

Another detail that characterizes the view of rats as compared to humans is that each eye can work independently. Rats do not detect red. In short, you could say that the rats see things very slowly, that is why they themselves move very fast.

6. Flies

The sight of flies and some other similar insects is a work of art by Mother Nature. Their eyes are composed of tiny elements called chromatids. Chromatids are small sensory units full of sensors. In addition, they have small lenses that help them to see things "in slow motion" and also see ultraviolet light. However, as we all know from experience, flies do not see translucent elements (windows). Here below you can see the possible vision of a fly.

7. Cats

As for the feline closest to the human being, its vision is very similar to that of the dog. They are able to distinguish the blues, browns, and yellows. His eyes are protected by a third inner eyelid. As you can see in the image below, what a cat sees is very close to what a human being sees. The amount of detail you see is amazing!

8. Sharks

Finally, one of the most feared predators on the high seas and on the shores, the shark. The shark's eyes are on the opposite sides of his head and have a vision range of almost 360 degrees. The shark has two important blind spots: right in front of his snout and behind the head. They can see only about 15 meters ahead and that is why it is useful only when it is already close to its prey. The peculiar feature of the eye of the shark is tapetum lucidum, the layer of tissue that allows them to see in low light conditions. When light enters the retina, it bounces back from the tapetum lucidum and once more it hits the retina. Cats also have this crystalline tissue and that is why the eyes of cats and sharks allow them to see in the dark.

At short distances, sharks see perfectly well underwater, but do not recognize the colors. During the hunt, they are guided by the sense of smell. It is said that sharks are able to sense a drop of blood several kilometers away. That makes them feared and dangerous predators.
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Source: / Starstock

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