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 nearsightedness?Take part Play sports outdoors for at least in outdoor31.each day.activities. Look far away after reading for 40minutes...
1 How to prevent nearsightedness Myopia( 近视 ) or nearsightedness can be a severe inconvenience and may even cause big troubles when we operate cars or heavy machinery. Here are some tips that may help you to prevent myopia. 56 Whether it’s for the love of books or because you are ...
How to Prevent Near-sightedness Myopia, or near-sightedness, can be a severe inconvenience and may even cause big troubles when we operate cars or heavy machinery. Here are some tips that may help you to prevent myopia. 1.1. Whether it’s for the love of books or because you are studyi...
How does a concave lens correct nearsightedness? Nearsighted people wear glasses with concave lenses to correct their vision. A concave lens correctsmyopiaby being thinner at the center and thicker at the edge. It diverges light rays entering the eye so they focus a little further back, landin...
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...
How to Prevent NearsightednessMyopia(近视), or nearsightedness, can be a severe inconvenience and may even cause big troubleswhen we operate cars or heavy machinery. Here are some tips that may help you to prevent myopia.1Whether it's for the love of books or because you are studying ...
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...
Bifocal lenses, which have a small plus segment, can help a farsighted person read or do close work, such as sewing. Astigmatism is caused by a distortion that results in a second focal point. It can be corrected with a cylinder curve. In addition, lenses can be made to correct for ...
When nearsightedness (myopia) is present, a person is able to see near objects well and has difficulty seeing objects that are far away. Light rays become focused in front of the retina. This is caused by an eyeball that is too long, or a lens system that has too much power to focus...
http://healthmad.com/health/how-to-cure-myopia-nearsightedness/ The main step to curing myopia is to relax your eye muscles so they do not stay locked up.(like a elastic if you let go of it the elastic will return to its original shape)But that takes time. You have to be patient ...