The survey shows that many students have become shortsighted at a
very young age.At present,about 70% of the students are shortsighted.
Here are some main causes.
Some students may not have enough sleep.Some students spend too
much time reading or doing their homework without a rest.Some students
even like to watch TV or use computers for a long time.
In order to have good eyesight,we should do eye exercises every
day.We can also try to do more sports in our spare time.We should have
the good habit of using our eyes.
