They've evolved to be round

他們已經進化成了圓形

so that they can swivel to spot delicious prey

這樣它們就能旋轉著發現美味的獵物了

and easily roll when your cousin

並在你表哥的時候輕鬆翻身

talks about his new car for the third time.

第三次談論他的新車。

But to get to that point, our peepers have come a long way.

但能走到這一步，我們的偷窺者已經走了很遠。

They most likely developed from a tiny light-sensitive patch

它們很可能是由一個微小的光敏片發展而來。

on single-celled organisms that would help them move towards light

在單細胞生物體上，將幫助它們向光的方向發展。

in the hope of finding food.

以期找到食物。

As the creatures evolved, this patch started to curve inward

隨著生物的進化，這個補丁開始向內彎曲

to better focus light. And now, a whole bunch of evolution later,

以更好地聚焦光線。而現在，一大堆進化之後。

what we've arrived at are two twinkling spheres

我們已經到了兩個閃閃發光的球體上了

that are capable of seeing about a million colours.

能夠看到大約一百萬種顏色。

Not bad, eh?

還不錯，嗯？

We might actually be on to something with that

我們可能真的是對的東西與

'window to the soul' stuff too,

'靈魂之窗'的東西了。

as our eyes can portray more about our emotions than you might think.

因為我們的眼睛可以描繪出比你想象中更多的情緒。

Your pupils dilate when you're scared, nervous or excited.

當你害怕、緊張或興奮時，你的瞳孔會放大。

That could be why they enlarge when we make eye contact

這可能就是為什麼當我們的目光接觸時，它們會放大的原因。

with someone we, like, like-like.

與我們，喜歡，喜歡的人。

Research has also shown that even making eye contact with

研究還表明，即使是與之進行眼神接觸

a portrait painting sets off a whole raft of brain activity.

一幅肖像畫引發了整個大腦的活動。

Our eyes are also responsible for another universal emotional reaction

我們的眼睛還負責另一個普遍的情緒反應

- a good old weep.

- 一個好的老哭。

But we actually have three types of tears,

但其實我們有三種眼淚。

each with their own chemical makeup.

每個人都有自己的化學成分。

Basal, which lubricate the eye.

基礎，可以潤滑眼睛。

Reflex tears, caused by irritants like dust or chopped onions.

反射性流淚，由灰塵或洋蔥碎屑等刺激物引起。

And psychic, or emotional tears,

而通靈，或者說情感的眼淚。

the kind that appear when you find out about Bambi's mum

當你發現小鹿斑比的媽媽時出現的那種。

for the first time.

第一次。

When it comes to our pupils, it's not just the size of them that varies -

說到我們的瞳孔，不僅是大小不同而已

the shape of an animal's pupils can tell us if it's predator or prey.

動物瞳孔的形狀可以告訴我們它是捕食者還是獵物。

Some have horizonal pupils, making them more adept at scanning

有些人的瞳孔是角形的，使他們更善於掃描。

for predators while munching on grass...

掠食者，同時吃草... ...

found on your local goats, sheep, and moose.

在當地的山羊、綿羊和麋鹿身上發現的。

Vertical pupils like those found on foxes, cats and crocodiles

垂直瞳孔，像狐狸、貓和鱷魚的瞳孔一樣

are better for ambushing and hunting at night, and have become synonymous

更適合在夜間伏擊和狩獵，已經成了

with animals that you just do not want to mess with.

與動物，你只是不想惹。

Our round pupils are kind of a best of both worlds

我們圓圓的瞳孔可說是兩全其美

and help us in active foraging and chasing down prey.

幫助我們主動覓食和追捕獵物。

Which, you know, we totally do, all the time.

你知道，我們一直都是這樣的。

There are quite a few animals who do a better job of seeing than we do.

有不少動物的視力比我們好。

The elephant hawk-moth,

象鷹蛾。

which sounds like that band your dad might have been in,

這聽起來像那個樂隊 你爸爸可能已經在。

was the first animal proven to be able to see colour

是第一個被證明能看到顏色的動物。

in the dead of night.

在夜深人靜的時候。

Their large, sensitive eyes allow the maximum

它們大而敏感的眼睛可以最大限度地

available light to pass through.

可供通過的光線。

However, this does impact their ability to detect fast-moving objects

然而，這確實影響了它們探測快速移動物體的能力。

like a rolled-up newspaper.

像一張捲起來的報紙。

Human eyes might not be perfect. Parts of them are even useless,

人類的眼睛可能並不完美。部分眼睛甚至是無用的。

like that little pink bit in the inner corners. \N

喜歡那個粉紅色的小點 在內角。\N

That's the remains of a third eyelid

那是第三層眼皮的殘餘物

like the ones cats, dogs and camels have.

就像那些貓，狗和駱駝一樣。

Our eyes aren't just physically interesting, but culturally too.

我們的眼睛不僅僅是生理上的有趣，還有文化上的有趣。

Much loved by conspiracy theorists the world over, The Eye of Horus

深受全世界陰謀論者的喜愛，《荷魯斯之眼》。

may symbolise the Illuminati to some, but its origins lie in Egypt

光明會 "在某些人眼裡可能是個象徵，但它的源頭在埃及。

where the eye is a symbol representing sacrifice,

其中眼睛是代表犧牲的符號。

healing and protection.

治療和保護。

In Turkey, some believe that a sideways glance can cause

在土耳其，有些人認為，側目會導致。

genuine pain. And thinking back to high school,

真正的痛苦。而回想起高中的時候。

they're not wrong.

他們沒有錯。

Glass pendants, also eye-shaped, are worn to protect

玻璃吊墜，也是眼睛形狀的，戴上它可以保護。

against this evil eye.

對付這邪惡的眼睛。

So whether round, monolid, hooded, downturned, upturned or almond,

所以不管是圓形、單層、罩式、下翻、上翻還是杏形。

words you're probably familiar with if you spend as much time watching

如果你花了那麼多時間去看，你可能會對這些詞很熟悉

makeup tutorials as me, your eyes are unique to you.

化妝教程和我一樣，你的眼睛是獨一無二的。

The two are even unique to each other.

兩者之間甚至是獨一無二的。

But one thing does unite us all...

但有一件事讓我們團結在一起... ...

we can't for the life of us keep them open when we sneeze.

打噴嚏的時候，我們不能讓它們保持開放的生活。