Myopia is the most common visual problem in the world,especially in younger patients,which may associate with various adverse effects even cause legal blindness.
近视是世界上最常见的危害视力健康的疾病,尤其年青患者更易受影响,它可严重影响视力,甚至形成法定盲。
参考来源 - 近视病因研究进展·2,447,543篇论文数据，部分数据来源于NoteExpress
Along with a slow developing brain, and legal blindness, it was also determined that she was legally deaf in her right ear.
她大脑发育缓慢，左眼失明，右耳失聪也已确诊。
Someone with 20/40 sight can see objects at 20 feet that those with normal sight can see from 40 feet. In many countries, 20/200 is the legal definition of blindness.
一些20/40视力的人需要在20英尺处才能看到普通视力40英尺处就能看到的东西，20/200就被认为是失明了。
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