How to Prevent Short Sight
It is said that(据说) now more than 30% of the students in primary schools in our country are shortsighted （近视的）. Why do so many children have something wrong with their eyes? Because they can’t read or write in right ways.
If we want to keep our eyes far away from（使我们的眼睛远离） the short sight, we should not read or write in weak light. Of course reading in the sun is also bad for our eyes. Some students don’t turn on the light in the room when they do their homework at home in the evening. At first, they feel they can see the words in the books. But after a long time, their eyesight will go down （下降） and they will become shortsighted.
Some students like to lie on the bed or sofa to read, and some students’ eyes are so near to their books when they read or write. This surely causes （引起） the short sight. So we should keep a right way when we study. The right distance(距离) between our eyes and the book is about 33 cm.
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责任编辑:yingyubao
