Eagles – Best Eyes in the Animal Kingdom To put that into perspective, an eagle has the visual acuity of 20/5 – meaning that it can see at 20 feet what a human with 20/20 vision would need to be 5 feet away from to see. By this standard, an eagle's visual acuity is 4 times stronger than ours.
The critter with the world's best color vision (as far as we know) is the bluebottle butterfly. Where we have three different types of cones to detect color, they have a whopping fifteen, some of which see in the UV spectrum.
The team found that chimps and other primates have about the same level of detail as us. Not a huge surprise. Interestingly, not many animals did better than us, except for a few birds of prey that can see nearly twice the limit of human's clarity of vision.
Tigers have six times better eyesight than humans.
Although chitons look very simple, these mollusks have a very sophisticated shell. Its outer layer contains up to 1000 tiny eyes, each a bit smaller than the period at the end of this sentence.
One animal who's vision we have even more to learn about than the butterfly is the mantis shrimp – taking the crown for the animal with the most complex vision. The mantis shrimp has between 12 and 16 photoreceptors and can see both UV and polarized light (two things that humans cannot see).
If you encounter an aggressive lion, stare him down. But not a leopard; avoid his gaze at all costs. In both cases, back away slowly; don't run.
Chameleons
One of the only animals with a wider range of vision than sheep and goats is the chameleon. Chameleons' eyes can swivel far enough to give them the full 360 degrees of vision. Beyond that, each of the chameleon's eyes can operates independently of the other.
Shark eyes come in all shapes and sizes, yet despite this, sharks and humans share many qualities when it comes to the eyes. Their structure is remarkably similar to ours. So much so, that their corneas are sometimes used in cornea replacement surgery in humans. You can in fact have shark vision!
The new research shows that dolphins have the longest memory yet known in any species other than people. Elephants and chimpanzees are thought to have similar abilities, but they haven't yet been tested, said study author Jason Bruck, an animal behaviorist at the University of Chicago.
The mantis shrimp's visual system is unique in the animal kingdom. Mantis shrimps, scientifically known as stomatopods, have compound eyes, a bit like a bee or a fly, made up of 10,000 small photoreceptive units.
Eagles. All species of birds of prey have incredibly sharp vision, but eagles are widely regarded as having the best eyesight in the world. Eagles can see, on average, eight times further than humans can and they can focus on prey from distances of up to two miles.
Chameleons can move their eyes in different directions, and most scientists thought that meant that each eye worked independently from the other. Scientists in Israel say they have discovered, however, that chameleons' eyes are, in fact, highly coordinated.
Cats are a bit better at near vision. But both dogs and cats rely more on motion rather than focus, and are rather farsighted, an evolutionary side effect of scanning the distance for prey. A dog can detect strong hand signals from as far away as a mile.
Over the past 30 years, many studies have found evidence that animals recognise themselves in mirrors. Self-awareness by this criterion has been reported for: Land mammals: apes (chimpanzees, bonobos, orangutans and gorillas) and elephants. Cetaceans: bottlenose dolphins, killer whales and possibly false killer whales.
Thus, Chameleon can see both sides at the same time.
Animals with the worst vision
The humble and industrious Mole. Living predominantly beneath the surface, these creatures have incredibly poor eyesight, with their tiny eyes being mostly covered by fur and skin. Their world is dark and blurry, but this is where their other senses come to life.
The Nile crocodile is the most aggressive animal in the world mostly because it considers humans a “regular part of its diet” according to a-z-animals.com. The animal can weigh up to 1,650 pounds and can be found in 26 countries in sub-Saharan Africa.
- If you look a Tiger in the eyes it is less likely to kill you. Tigers prefer to hunt by ambush, so by looking a Tiger in the eyes you are showing him you know he is there. Now he has lost the element of surprise, and will most likely go find something else to feast on.
With all of that size, the blue whale needs a big heart. In fact, they have the biggest hearts on the planet. The heart of a blue whale weighs more than 1,000 pounds, the weight of an average dairy cow. A blue whale heart pumps about 60 gallons of blood with each beat.
Huskies are known for their captivating eyes, but this pup is especially striking. As you might have already guessed, this doggo has heterochromia, a condition in which the two irises of the eyes can be totally different colors.
The sperm whale has the biggest brain of any animal species, weighing up to 20 pounds (7 to 9 kilograms).
The Rarest Eye Shape
Almond, monolid, downturned, hooded—the list goes on. But the rarest one is up for debate. Beauty is subjective, and opinions can vary drastically. Some people in North America might consider the monolid shape rare, but this is a common sight in East Asia.