Myopia, also known as nearsightedness, is a prevalent condition in China.

近视在中国一种普遍疾病。

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视和在学校上学时间有关。

If we say something runs in the family, it can be due to genes or DNA. So, like Rex was saying, if nearsightedness runs in your family, that means that many of your family members may need glasses.

如果说某事在家族中流传，可能由于基因或DNA所致。 因此， 正如雷克斯所说，如果近视在你们家族中常见，意味着许多家庭成员可能需要佩戴镜。

" The condition of myopia or nearsightedness is caused by the fact that the eye is too long, " says Carolyn Lederman, an ophthalmologist based in Purchase, New York.

“近视成因球过长。”纽约帕切斯科专家卡罗琳·莱德曼说。

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

近视人聚焦远方物体有困难，通常因为球太长，有点像美式足球。

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

A, 色盲, B, 营养不平衡, C, 近视, 还D, 面临压力?

Maybe curly hair or nearsightedness runs in your family.

或许你家有卷发或近视遗传倾向。

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.

当我们将所有分放在一起时，种对近视最终解释——环境和行为改变会影响我们使用睛方式——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，用他那双敏锐睛观察和测试各种各样人，尽管他们近视，但他睛却看到了很多。

But it just seems like it's causing some long-term damage just for some nearsightedness to please Donald Trump and stay out of his glare right now.

但似乎只为了前取悦唐纳德·特朗普并避开他锋芒，而导致了某长期损害，显得有目光短浅。

Optometrists are experts in diagnosing conditions such as nearsightedness, farsightedness and astigmatism, and prescribe corrective lenses on the basis of vision tests.

验光师擅长诊断近视、远视和散光等状况，并根据视力测试结果开具矫正镜片。

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， 从而降低患近视（也称为近视）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，近视可以通过发散镜片来矫正 ，分散光线，从而 在适当距离形成聚焦图像。