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双语阅读:近视的人 老了以后视力会变好吗?

2020-03-08 19:49

如果说年轻时近视的我们,老了之后会远视,那么,是不是会有那么一段时间,我们的视力能好到看清视力表最下面那一排“鬼画符”呢?

双语阅读:近视的人 老了以后视力会变好吗?

答案是:不一定。

事实是这样的:

Babies are actually farsighted, and as they grow older their eyes grow too until they reach a point of "perfect" eyesight, called emmetropia.

刚出生的婴儿都是远视眼,但随着年龄增长,眼睛也会发育,直到“视力正常”,学术上叫做“屈光正常”(emmetropia)。

出生的时候,婴儿都一样,都是远视眼。等慢慢长大,儿童的视力就正常了。但很多人青春期长着长着就过了那个点,变成了近视。

It isn't entirely worked out what cues the eye that it is time to stop growing, but we know that in many kids the eye continues to grow past emmetropia and they become nearsighted.

其实直到现在(科学家)也还没有完全弄清楚是什么因素“告诉”眼睛该停止发育了。但我们知道,很多孩子的眼睛在视力正常后继续发育,结果变成了近视。

双语阅读:近视的人 老了以后视力会变好吗?

Basically, when the eye grows too long the light inside the eye comes to a focus in front of the retina rather than at the retina, causing blurry vision, so we must wear glasses to change the optics and focus the light onto the retina again.

是这样的,如果眼睛的前后距离太长,眼睛里的光线就会聚焦在视网膜前面而不是视网膜上,从而造成了模糊的视觉,因此,我们必须戴上眼镜来改变光线的路径,使它再次聚焦到视网膜上。

双语阅读:近视的人 老了以后视力会变好吗?

When we age, we suffer a different process. Our tissues become stiffer and the lens doesn't adjust as easily so we start to lose near vision as well.

随着年龄增长,我们会经历一个不同的过程。我们的眼部组织会变得僵硬,晶状体的活动性也变差,渐渐地,我们就连近的东西也看不清了。

双语阅读:近视的人 老了以后视力会变好吗?

等到老了,以为远视可以把它拉回来,却发现晶状体已经失去了弹性,近视远视并存,需要两幅眼镜了。

Many older folks must wear bifocals which have two different lenses- one to correct for the problems with near vision and one to correct for problems with far vision.

许多老年人必须佩戴有两种不同镜片的双焦眼镜,一种用于矫正近视问题,另一种用于矫正远视问题。

环顾四周,想想看,你身边戴眼镜的人占多大比重?

事实上,中国青年的近视问题早就见诸国际媒体的报端。

今年四月份,China Daily就曾报道过学生的近视问题:

More than half the young children and teenagers in China are nearsighted, according to a survey by top government agencies, which called for intensified efforts to prevent and control the condition.

相关部门的一项研究显示,中国有一半以上的儿童和青少年是近视眼,该研究呼吁加大预防和控制近视的力度。

The survey, which was conducted last year, found that eight of 10 senior middle school students were nearsighted, compared with 71.6 percent in junior middle school, 36 percent in primary school and 14 percent of 6-year-olds in kindergarten. Overall, 53.6 percent were nearsighted.

去年进行的这项研究发现,10名高中生中有8人近视,而初中生近视率为71.6%,小学生近视率为36%,幼儿园6岁儿童近视率为14%。总的来看,也有53.6%的人患有近视。

The prevalence of a high degree of myopia also became alarming as the percentage of senior students in high school, who wear glasses stronger than six diopters, has mounted to 21.9 percent.新华社的同期报道也显示,高中生近视人群中高度近视的人数也有显著增加。

高度近视的患病率也令人担忧——高中生中戴着600度以上近视眼镜的比例已经上升到了21.9%

Up to 80 percent of the country’s young adults suffer from nearsightedness, according to a report in the medical journal Lancet. In contrast, the overall rate of myopia in the UK is about 20-30 percent.权威医学杂志《柳叶刀》在2018年的一项针对中国青年群体的研究中发现:

医学杂志《柳叶刀》的一项报告显示,(中国)80%的年轻人患有近视。相比之下,英国的近视率大约为20%-30%。

If you walk the streets of China today, you'll quickly notice that most young people wear glasses. In Shanghai, for instance, 86 percent of high school students suffer from myopia, or nearsightedness, according to Xinhua News Agency.早在2015年,美国国家公共电台引述新华社报道的数字称当时就有86%的高中生患有近视了:

走在如今的中国街头,你会很快注意到大多数年轻人都戴着眼镜。

类似的数字还被《每日电讯报》、半岛电视台和石英网等媒体报道过。

之后,2017年《南华早报》的报道引述了《柳叶刀》的一项研究显示:青少年大范围近视不仅仅是中国一个国家的问题,是整个东亚地区的问题。