Name: 眼睛顏色 - 為什麼我們的眼睛顏色不同？ (EYE COLOR - Why do we have different color eyes?)
Uploaded: 2025-06-17T14:26:14.000Z
Duration: 1 min 59 s

If you found yourself as a time-traveling cat.

如果你發現自己是一隻穿越時空的貓。

You would find all humans had brown eyes.

你會發現所有人類的眼睛都是棕色的。

At some point in the last 6,000 to 10,000 years.

在過去 6000 到 10000 年間的某個時刻。

One person was born with a horrifying genetic mutation.

有一個人天生就有可怕的基因突變。

But a genetic mutation that resulted in them having blue eyes.

但基因突變導致他們的眼睛是藍色的。

Every person alive today with blue eyes is a direct descendant of this one person.

今天活著的每個藍眼睛人都是這個人的直系後裔。

If this mutation did not occur, we would all still probably have brown eyes today.

如果沒有發生這種變異，我們今天可能都還是棕色眼睛。

This gene mutation affects the OCA2 gene.

這種基因突變會影響 OCA2 基因。

And reduces the melanin production in the colored part of the eye, called the iris.

並減少眼睛有色部分（即虹膜）的黑色素生成。

Melanin is a pigment, and the amount of it in our eyes is what gives them their color.

黑色素是一種色素，眼睛中黑色素的含量決定了眼睛的顏色。

The more melanin in your eyes, the darker your eyes will be.

眼睛中的黑色素越多，眼睛就越黑。

Green eyes have a small amount of melanin.

Brown eyes have a higher percentage of melanin.

Eyes are thought to have been solely brown 10,000 years and beyond to help protect against the sun's damaging rays.

人們認為，在一萬年甚至更久的歷史中，眼睛一直都是棕色的，以幫助抵禦太陽光的傷害。

Living closer to the equator where the sun's rays are stronger.

生活在離赤道更近的地方，那裡的陽光更強烈。

Blue is not actually the real color of eyes without melanin present.

實際上，沒有黑色素存在的眼睛的真正顏色並不是藍色。

It all has to do with the scattering of light which gives them color.

這一切都與光的散射有關，光的散射賦予了它們顏色。

Watch our video on the subject to find out why this is.

請觀看我們的相關視頻，瞭解其中的原因。

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眼睛顏色 - 為什麼我們的眼睛顏色不同？ (EYE COLOR - Why do we have different color eyes?)