Is it: A, color blindness, B, nutritional imbalance, C, nearsightedness, or D, stress?

是A, 色盲, B, 营养不平衡, C, 近, 还是D, 面临压力?

Because a new study finds that nearsightedness is linked to the number of years spent in school.

因为一项研究发现近学校上学的时间有关。

People with myopia, or nearsightedness, have trouble focusing on objects far away, often because the eye is too long—kind of football-shaped.

近的人聚焦远方物体有困难，通常因为太长，有点像美式足。

It helps the eyes produce dopamine, which lowers the risk of developing nearsightedness (also known as short-sightedness).

它有助于睛产生多巴胺， 从而降低患近（也称为近）的风险。

So nearsightedness can be corrected by diverging lenses, spreading out the light rays so a focused image is formed at the proper distance.

因此，近通过发散镜片来矫正 ，分散光线，从而 适当的距离形成聚焦图像。

When we put all these pieces together, this ultimate explanation for nearsightedness -- that environmental and behavioral change impact the way we use our eyes -- helps us better understand the proximate cause.

当我们将所有这些部分放一起时，这种对近的最终解释——环境行为的改变会影响我们使用睛的方式——有助于我们更好地理解近因。

For her sake he came out of his shell and went about seeing and testing all sorts of people with those observing eyes of his, which saw so much in spite of their nearsightedness.

为了她，他破壳而出，用他那双敏锐的睛观察测试各种各样的人，尽管他们近，但他的睛却看到了很多。