Short-sightedness or myopia is a refractive condition of the eye, where the eye is too long in shape or the lens over refracts causing the light rays to focus in front of the retina, instead of on it. This causes blurry vision when looking at objects far away, however, objects nearby ...
原文“Myopia is the most common visual impairment in children,and China has an unprecedented rate of nearsightedness”前半句总述近视是儿童中最常见的视力问题, 后半句引出中国,并且这句话后面所述都是有关中国的情况。选项B、C、D相关 内容在原文中都是论述中国的,而该题所问为全球范围内的情况,只有...
It is b a d for your eyes. You shoul d look at things far away for 10minutes after using them for 30-40 minutes. If you use the computers or phones to play, you should rest your eyes every 15 minutes.请仔细阅读短文,然后完成下面的表格。 每空词数不限。How to prevent nearsighted...
Nowadays, more and more people are with shortsightedness, no matter teenagers, adult or the aged. How to prevent shortsightedness in our daily life is quite an important issue to all of us.We could follow the steps below to prevent shortsightedness and rest our eyes. Not to ...
In people with myopia, or short-sightedness, a steep cornea focuses light just short of the retina. Those with hyperopia, or far-sightedness, have the opposite problem: light is focused too far beyond the retina. And in...
For the purpose of understanding how a concave lens can diverge light to correct nearsightedness, we can think of myopia as the eye having too much convergence of light. We know that myopia is usually due to an eyeball that is too long (axial myopia), but it is easier to think of it...
3. 根据“If you r___43___ have shortsightedness, you need to wear right glasses.”可知,此处表示如果你真的近视,你需要戴合适的眼镜,结合首字母r,应填really,意为“真的”。 4. 根据“Wearing glasses is b___44___ to make your eyes relaxed.”可知,此处表示戴眼镜有助于放松眼睛,结合首字母...
可知它会引起你的头痛,并可能使你的眼睛变干.可知上句应该在说:无论它是一本书还是电视,离的太近将会干扰你的眼(Whether it's a book or the television,being too close is going to bother your eyes).故选F.40.D.小标题选择.根据后文Early detection of nearsightedness can lead to quick treatment...
It's completely normal, and also easily corrected. But presbyopia requires a different type of lens than those used to correct farsightedness. Why Am I Farsighted? Farsightedness has many different causes. The most common cause of farsightedness is genetics. ...
Chaos and conflict in human society, shortsightedness and indifferences, delay the cooperative action needed to move toward a sustainable future. We do not know how much time we have to avoid catastrophic collision with the hard ... LK Caldwell - 《Politics & the Life Sciences》 被引量: 8...