Animals with Big Eyes are found very rarely. According to scientists, eyes evolved as basic light sensing organs around 540 million years ago. Now, for many animals, including humans, vision is the most essential concept and they have become immensely varied and complex. Check at some of the animal kingdom’s strangest and most incredible eyes
10 Animals With Big Eyes: Tarsier
The tarsier is a small nocturnal primate, found in South East Asia’s rainforests. It is the world’s only fully predatory primate which feeds on lizards and insects and is even known to capture mid-flight birds. It is the most impressive feature but its huge eyes, the largest of any animal, are relative to the size of the head. It would be the size of grapefruits if your eyes were proportionally as large as those of the tarsier. Such massive eyes are fixed in the skull, and their sockets can not shift.
That tarsier’s eyeball measures approximately 08 mm in diameter resting on a 10 cm array head. The tarsier has a very flexible neck to compensate for this, and can turn his head 180 degrees to search for potential prey or predators, just like an owl.
9 Animals with Big Eyes: Chameleon
Chameleons are known for their ability to switch color, an ability to communicate and express their intensions, or mood, to other chameleons. Such lizards also have very peculiar eyes; their eyelids are fused and cover almost the entire eyeball, with the exception of a small hole that allows the pupil to see through; each eye can be shifted independently of the other so that the chameleon can continuously search for predators or potential threats. This also means the chameleon has a complete field of vision of 360 degrees.
8 Animals With Big Eyes: Dragonfly
The dragonfly is another creature to make it into the big-eyed animals list. The most peculiar and giant eyes are generally regarded as the most feared species of Ariel. Even under low light conditions, their giant eyes give them an almost perfect vision.
Each eye of the dragonfly contains a multitude of light-sensitive cells and units of vision. Such Ariel insects in such low light can capture their prey when humans can’t even see it. Their helmed presence adds them to our list of animals with large eyes.
7 Animals With Big Eyes: Leaf Tailed Gecko
Such strange-looking lizards are native to Madagascar’s islands. Geckos have unusually big eyes. Their eyes ‘ vertical pupils give them an unearthly look. Their eyes have’ pinholes’ that expand at night, allowing leaf-tailed geckos even at night to see clearly.
These large-eyed animals have a 350-fold sharper vision than human eyes. There are no eyelids for these lizards to protect their large eyes. Instead they are covered by a translucent membrane.
6 Animals With Big Eyes: Colossal Squid
Colossal Squid also has the largest eyes of the squid species. Among all other animals, it is thought to have the largest ears. It is said that that eye of the colossal squid is larger than a dinner plate and its lens is as wide as an orange.
Those large eyes make it possible for the squid to see and search under the water surface. The colossal squids are the largest invertebrates known to date with the largest eyes, so far as specimens are considered.
5 Animals With Big Eyes: Four Eyed Fish
Located in Mexico and Central America, as well as in Northern South America, these are small fish that measure up to 32 cm and are usually found in fresh or brackish water. Most of them feed on bugs, and they spend most of their time on the water swimming.
Four eyed fish have only two ears, despite their name. However, a band of tissue divides these eyes, and each half of the eye has its own pupil. This unusual adaptation helps the four eyes to see both above and below the waterline accurately (and at the same time), looking for prey as well as predators.
4 Spook Fish
A fish with a somewhat ghostly appearance is the next big eyed creature on our list. This underwater fish is a rare sight, but it can scare you. Spookfish has a mirror-like appearance with large eyes.
The mirrored structure provides the eyes with more light and improves their vision. This means that simultaneously, which is slightly unusual, a spooked fish can look up and down. The giant mirror eyes make one of the biggest eyed creatures to spook fish
3 Slow Loris
Next on the list is the Slow Loris, a nice, beautiful, bunny-like animal. This adorable stuffed animal has big eyes, but it has to die for its innocent look. Their forward-looking eyes provide them with a 3D vision.
Their round wide eyes are hidden by a reflective surface that further improve low light vision. Nevertheless, monochromatic vision is only perceptible. They’re not able to see colors. Slow Iorisis communicates by producing a “scent.” From their muscles they secrete a poison that can be lethal to humans.
2 Ogre faced spider
Spiders are known to have many eyes (although this varies greatly between different species, some with two, four, six or eight eyes). The Ogre-faced spider has six eyes, but it looks like it has only two eyes because the middle pair is bigger. This is an adaptation for a nocturnal lifestyle; ogre-faced spiders have excellent night vision not only because of their huge eyes, but also because they are protected by an extremely light-sensitive cell surface.
In reality, this membrane is so sensitive that it is destroyed in the morning and every night a new one is made. Ogre-faced spiders are unusual because they can see perfectly at night, even if they lack tapetum lucidum, a reflective membrane that helps other spiders (and other predators like cats) to see in low light. Scientists believe, as a matter of fact, that ogre-faced spiders have better night vision than cats, sharks or even owls (which can see up to 100 times better at night than people!).
1 Mantis shrimp
And finally, with the strangest and most amazing eyes in the world, we get to the animal. In fact, the mantis shrimp is not a shrimp, but a different kind of Stomatopoda crustacean. Mantis shrimp are voracious predators found mostly in tropical waters, known for their aggressiveness and formidable arms (they have an extremely sharp and strong claw and can split a human finger into two or even smash a glass tank with a single strike).
Their eyes are compound, like those of the dragonfly, although they have a much smaller number of ommatidia (about 10,000 per eye), but each ommatidia column has a specific function in the mantis shrimps.