About one in fifty people have some level of color vision deficiency.

五十人中有一个人拥有某种程度的 色觉不足，大多是男性，因为。

There’s a good deal of ongoing research around exactly how our color vision works.

有很多关于我们色觉的研究正在进行。

But we now know that color vision developed around 30 million years ago so that's not it.

但是我们现在知道色觉是在 3000 万年前发展起来的，所以情况不是这样的。

The reality is actually closer to how humans experience color-blindness, which is more accurately called " color vision deficiency" .

然而，现实更接近于人类的色盲体验，更准确地说法是“色觉辨认障碍”。

Humans may have the advantage in color vision, but dogs definitely have us beat in the realm of night vision.

人类在色觉方面可能有优势，但狗的夜视能力肯定比人类强。

Why do we have color vision?

为什么我们有色觉？

Cones are used in color vision, but they only really work if there’s a good amount of light.

视锥细胞用于色觉，但只有在光线充足的情况下它们才真正起作用。

Some researchers even think that we evolved our awesome color vision, in part, to help us successfully spot snakes.

一些研究人员甚至认为，我们进化出令人敬畏的色觉，部分原因是为了帮助我们成功发现蛇。

Interestingly enough, these color categories also match up with the six colors central to what's known as the opponent-process theory of color vision.

有趣的是，这些颜色类别也与六种颜色相匹配，这六种颜色是所谓的颜色视觉的补偿反应理论的核心。

Of mammals only humans and some primates enjoy color vision. The red flag is black to the bull. Horses live in a monochrome world .

在哺乳类动物中，只有人和一些灵长目动物能够分辨颜色。红旗在公牛看来是黑色的，马则生活在一个单色的世界里。