says that the eyes are the windows of the soul. This may be true for humans, but things get more complicated when you think about animals.
It's a difficult world and you need to keep looking for danger. While our two frontal eyes serve humans well, they are seriously inadequate for many animals.
As a result, some creatures grew some very weird eyes. They might do well to achieve what they expected, but that doesn't make these voyeurs less strange.
Here are six animals with one or more of the weirdest eyes in nature.
Trilobites
Eyes are soft tissues, so they are not usually stored in fossil records. Researchers have difficulty determining what certain ancient animals can see.
Trilobites are not the case. We know very well how these primitive marine creatures perceive the world because their eyes have bones.
OK, not bones, but their lenses are made of calcite . This hard mineral can easily turn into fossils, so scientists have been able to study trilobites' eyes in great detail.
We now know that they are some early animals that develop complex compound eyes , just like you can see in modern insects. Oh, and their eyes may be brown if you want to know.
Lizard — Three eyes help you see
Big Lizard is really not what it looks like. You might think of it as a kind of lizard, but these reptiles are actually the last survivor of an older reptile lineage.
You may also think it has two eyes, but this is also wrong. It actually has three.
There is a third top eye on the head of the big lizard. It is clearly visible in the young big lizard, but is covered with scales as the animal ages – although it remains functional.
The top eye has the retina and lens, just like the ordinary eye of a lizard, but its nerves have degenerated. A long time ago, the third eye might have been fully functional, but now it mainly senses changes in light.
Scientists believe that third eye can help lizards stay in the shade in hot weather. It can also warn them of potential predators lurking above them.
Chameleon - Zoom in, enhance
Chameleon's eyes are not like eyes, but more like an advanced camera system. This binocular high-tech set comes with two freely moving cameras and built-in zoom.
The chameleon's eyeball is wrapped in the fused eyelid, leaving only a small pinhole for the pupil to use. The lizard can rotate each eye freely and can see two objects at a 360-degree field of view.
But once they find a delicious insect, both eyes lock on the same target, and the chameleon switches from monocular vision to binocular vision. It can even enlarge anything it sees for a better picture.
So, if you happen to be an insect, you notice a chameleon looking at you with your eyes…Don’t run away, you’re over.
Mantis Shrimp – look at all these colors
If you ask a mantis shrimp what it sees, it may say, "everything". It won't even be exaggerated.
First, humans can see three color channels - red, green and blue. A mantis shrimp can see 12 colors. Essentially, it can see colors that we can't understand at all.
Not only that, although we need two eyes to perceive depth, the mantis shrimp only needs one eye. There were all kinds of other strange things in their eyes.
Apt example - they can see it before the cancer develops obvious symptoms.
Researchers are not sure what kind of complex eyes the mantis shrimp actually needs. Part of the reason is because we can't understand what they see at all. Our brains are not connected to this.
Reindeer - From blue to brown
If you happen to meet another reindeer from Rudolph, Blitzen or Santa during Christmas, you will notice that their eyes are blue. But in the summer, suddenly Rudolph had golden brown eyes.
The seasonal eye color change of reindeer is derived from an evolutionary quirk of its Arctic habitat. In summer, the sun in the north hardly sets, and in winter, the land is almost always shrouded in darkness.
Turning their peeps blue in winter gives reindeer a better view in the cold Arctic twilight. Meanwhile, in summer, the brown color protects their eyes from glare.
Dragonfly - Sky Eye
If you encounter a dragonfly, don't doubt whether it can see you. It can, with more eyes than you think.
The eyes of dragonflies are the most numerous of all animals on the earth. Although it appears that the insect has two large spherical eyes, each eye is composed of thousands of small lenses—each lens is essentially an eye.
In general, some dragonfly species have nearly 30,000 lenses per compound eye. They can't turn their eyes, but they really don't have to.
Since their eyes cover almost the entire head, they have almost a full 360-degree field of view. Most importantly, like mantis shrimp, they can sense color wavelengths that we can't even understand.
The visual data captured by dragonfly eyes is so large that researchers are not sure how their tiny insect brains process all of this data.
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