We used to think about myopia as an optical defect.

我们过近视是一种视力缺陷。

These people cannot see distant objects clearly.

患近视的人看不清远处的物体。

Although, I think Kenzi's a little near sighted.

虽然 我觉得肯吉有点近视眼。

But Li is also keenly aware of the risk of a relapse.

但李女士仍对近视复发表示担忧。

The major problems are refractive errors like myopia and astigmatism.

主要问题是近视和散光等屈光不正。

The amount of myopia and the risks to your vision… later in life.

近视的程度和对你未来视力的风险。

I mean, ruining your eyesight staring into a microscope.

你总盯着显微镜 眼睛近视了。

Thin description leaves the reader feeling bewildered and nearsighted.

描绘不足会让读者感到迷惑，仿佛近视眼看不清事物。

Do not read in dim light, or you're likely to become nearsighted.

别在暗淡的光线下看书，否则你可能会得近视。

The data shows an increase in cases of myopia since 1990.

数据显示，自1990年以来，近视病例有所增加。

So much so that it can't all be blamed on geeky genes.

近视眼的增长如此多以致于不用怪罪于基。

The myopia prevalence among local children and minors is 60 percent.

当地儿童和未成年人近视患病率 60%。

This summer, hospitals are registering a spike in the number of such operations.

今年夏天，不少医院的近视手术预约大幅增长。

In the 1970s, 25 percent of Americans had myopia; but just three decades later prevalence rose to 42 percent.

20世纪70年代，美国有25%的人口近视；而只过了30年，近视率就升到了42%。

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

近视在中国是一种普遍的眼部疾病。

For those who start to develop myopia there's treatment.

对于那些开始发展近视的人，是有治疗方法的。

Anatomy Before we describe myopia, let's compare the eyeball to a camera for better understanding.

解剖学在解释近视之前，了更好的理解，让我们把眼球比作相机。

A new study estimates that one third of children and teenagers worldwide is short-sighted.

一项新的研究估计，全球三分之一的儿童和青少年患有近视。

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

一项研究发现近视眼和在学校上学的时间有关。

Nearsighted is when you can see up close but it's really difficult to see far away.

近视是指你能看近处的东西，但很难看到远处。