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

是A, 色盲, B, 营养不平, C, , 还是D, 面临压力?

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

因为一项研究发现眼和在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.

的人聚焦远方物体有困难，通常因为眼太长，有点美式足。

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

它有助于眼睛产生多巴胺， 从而降低患（也称为）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，可以通过发散镜片来矫正 ，分散光线，从而 在适当的距离形成聚焦。

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在一起时，这种对的最终解释——环境和行为的改变会影响我们使用眼睛的方式——有助于我们更好地理解因。

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，用他那双敏锐的眼睛观察和测试各种各样的人，尽管他们，但他的眼睛却看到了很多。