How Pets see the world
Speaking of great vision, people mean the ability to see a clear colorful image near, far and peripheral vision. Many of the familiar options are for cats insignificant. The vertical pupil in the eye of a predator to protect it from direct sun rays, so in bright light narrowed to thin slits.
Near the Photoreceptors of the eye cat has special education – tapetum that “intercepted” and sent the light back to the retina, which allows your cat to see at dusk as during the day and night – as one sees at dusk. Thanks to tamamo and glowing cat eyes in the dark.
All cats perceive the world in shades of grey, green and blue. Surprisingly, cats do not differ with visual acuity in the usual sense, the small details they see vague, while hunting mostly focus on the sounds and movements. In addition, vision night hunter covers 270 degrees, and each eye distinguishes up to 45% of the picture, so the cat is able to calculate the distance of a long jump with an accuracy of up to 3-4 cm.
For a long time it was believed that dogs see the world in black and white. Actually, they distinguish colors, but slightly different. In the human retina contains 3 types of cones responsible for color perception: the first is sensitive to longwave radiation (red and orange), the second – to medium-wave (yellow and green), third– to short-wavelength (blue and violet).
In dogs there is no first type of cones, with the result that they are not sensitive to orange-red color and may perceive it similarly to yellow-green. The color that the owner identifies as blue-green, for the dog will be white, but the dog more other creatures distinguish shades of gray. Field of vision dogs “stretched out”, whereby it gets the image 270 degrees (for comparison, a similar option for human perception is at 60-70 degrees less).
Dogs, like cats, are guided by the movement, and still the subject is able to perceive at a distance of 600 meters (while moving catch from 800-900 meters). Interesting fact: for breeds of dogs with hanging ears, the main thing is the vision, and individuals with standing ears trust in the first place, hearing.
These rodents have long moved into the category of domesticated, but even if your house is rat – intruder, you can be sure that she is not even aware of your presence on the other side of the room, if you do not move and do not call for help piercing cry.
The fact that the maximum distance for sight of the rat, only about 1 meter, all the fault of panoramic vision and laterally placed eyes, allowing the rat to distinguish the surrounding objects. Binocular vision rats, unlike human, multiple captures of individual images at different angles.
Rats discern the distance to the object, but because of the low coverage this is true only in a limited area. Rats also lack color vision. Like dogs, they are well distinguished gray color, perceive the blue and green part of the spectrum, but red for them is tantamount to absolute darkness. But rats can see ultraviolet light, and even distinguish shades of ultraviolet.
Feathered Pets at home very good eyesight. The angle of the location of the eye equal to 360 degrees, so Keshi can not hide any component in the environment. Of course, the budgies see the world in color, indicated by the bright plumage, created to recognize individuals of each other.
Unfortunately, parrots can’t see close objects, therefore, noticing food from a distance, up close they are guided through the tip of the beak. Thanks to a highly developed eye muscles, parrots can be considered two separate subjects at the same time, but in the evening they “go blind” and in the dark is no longer able to navigate, so a cage with birds suggest that you cover at night.
And here, for example, sparrows see the world in pink. The end of the light-sensitive nerves in their tissue have oily reddish-yellow drops, making Sparrow in a literal sense looks at life through rose-colored glasses.
The angle of the horse is equal to 350 degrees, and therefore, not the horse sees only what is under his face, above the forehead and straight nose. That is why a horse will not pick up lying in front of her a piece of Apple she just doesn’t see. But horses see perfectly in the dark and is able to accurately estimate the distance to objects.
The main feature of their view – monocularity than often due to fearfulness of horses: they see two different pictures with two eyes, and not a single image, as in the case of human vision, and the horse often frightened of the thing that went from one field of view to another.
Because of the presence of “blind spots”, the horse does not see the object, located in the middle area. In addition, the range of vision of a horse less than 500 metres away, and it slowly adapts to color changes, because of what horses are often scared of sunlight and sudden shadows on the ground. Color HP view range is quite varied, although horses and have a weakness for blue and green shades.
Few dare to host such a charming house pet, but if you are the proud owner of a snake, you must know how it sees its master. Snake eyes are covered with a thin leathery film, the result of fused eyelids. By the beginning of the molting snake eyes become cloudy, and this makes it difficult vision. In the future, the film takes a change of “apparel”.
Goes, vision a snake several times in the course of life deteriorates and returns to reptiles. Snakes, the world’s leading daily way of life, inherent in a round pupil, and night – narrow vertical. Binocular vision allows the snake to form a picture of the retina of both eyes, but vision is focused primarily on thermal information. So, the snake sees the contours, dimensions, distance to the other animal, and this way allows to determine the warm-blooded mouse on the cool soil and cold-blooded frog in the warm vapours of the earth. The picture shown is an example of how a snake sees a man.