Pet care site TrustedHousesitters has developed a new interactive tool. It shows in what colors different animals perceive the world around them. Some of them do not see all the colors that we see, and some even see colors that we are not able to see. 
The application allows you to take or upload photos and apply filters based on the vision of a particular animal 
You can see how dogs, cats, rabbits and birds see our world.
Their eyes are different, therefore, the field of view and color spectrums are different. 
Left: as a person sees. Right: How a dog sees 
At the back of the human eye are photoreceptors—cells that respond to light entering the eye. They come in two types: rods or cones, and while rods are sensitive to movement and night vision, cones are capable of detecting color.
Humans have three types of cones, and each is most sensitive to a specific color: red, green or blue. Dogs only have two types of cones, which are sensitive to blue and yellow, meaning they can only see these colors, as well as shades of gray. However, dogs can see better in the dark and detect movement much better than humans.
Color spectra of humans and dogs 
Also, dogs' eyes are positioned at a 20° angle and are much further apart than ours, which increases their peripheral vision. This arrangement gives them a 240-degree field of vision—more than a human's 180-degree field of vision—but it means they can't see things in 3D and have reduced depth perception.
Well, what dogs lack in vision, they more than make up for with their other senses, such as smell. It is 10,000–100,000 times sharper than ours.
Left: as a person sees. Right: as a cat sees 
According to scientists, cats are also not able to see the entire spectrum of colors available to the human eye. It is believed that they mainly see only blue and gray.
But they are much better at detecting motion than humans thanks to their 200° field of view and greater peripheral vision. And have excellent night vision because they have eight times more rod-shaped photoreceptor cells that are sensitive to low light levels.
But cats don't see as well in bright light because they have ten times fewer cones than we do, so everything looks blurry to them. 
When it comes to rabbits, they have an almost 360-degree field of vision due to the fact that their eyes are located on the sides of their heads, but they have a blind spot right in front of them. Therefore, they rely more on their keen sense of smell, and also use their whiskers and teeth to “see” what is directly ahead.
Rabbits also have bicolor vision, limited to green and blue, and can only see in two dimensions at close range. Their world appears grainy, but they see better in the dark than humans because they have more rods.
Left: as a person sees. Right: How a rabbit sees 
What about the birds? Oh, they were luckier! They can see the full spectrum of colors that humans see, plus a few additional colors that we can't! This is explained by the fact that birds have four types of cones, and their extra cone allows them to see wavelengths of light in the ultraviolet range.
Left: as a person sees. Right: as a bird sees 
Bird species with eyes on the side of their heads have a visual field of about 300°, while birds with eyes at the front, like owls, have a field of vision of about 150°.
Some birds can also use "monocular" vision, which allows them to focus on different objects at the same time, rather than "binocular" vision, where both focus on the same object at the same time.
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