你是否曾经思考过为什么新生儿的眼睛是蓝色的？


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选材／校对／翻译：hqj5715
The variations in eye colors come not from the color of the pigment in the iris, but rather from the amount of the pigment our iris produces. As more melanin is produced, the eye's color changes from light blue to dark blue to green to hazel to brown. You might be wondering why newborn babies' eyes are blue, rather than some other colors, such as pink or white. Actually, at birth, our irises don't have much color at all. In nature, things that don't actually have color, such as water or the sky, often look blue. That's because blue is the most easily scattered, or reflected, color of light in the spectrum. It's like nature's default color. Before our irises produce melanin, they don't reflect any color, so, like the sky, they look blue, too.
眼睛颜色的不同并不是来自巩膜色素中的颜色，而是由巩膜所产生的色素的量来决定的。随着黑色素产生的不断增多，眼睛的颜色便由浅蓝变成深蓝、绿色、褐色、棕色。 你也许想知道为什么新生儿的眼睛是蓝色的，而不是其他的颜色，比如粉红或者白色。实际上，刚出生时，巩膜并不含有颜色。自然界中，不含有颜色的物体，像水和天空，看起来都是蓝色。那是因为蓝色在所有的色谱中是最容易分散的或者说反射的颜色，就像是自然的保护色。在我们的巩膜产生黑色素之前，他们不反射任何的颜色，因此变相天空一样，呈现为蓝色。