Nowadays, more and more people, especially teenagers have poor eyesight and they have to wear glasses. There are many reasons for this. Some people watch too much TV or play computer games for too long. Some people read books or play mobile phones in dark light. All these behaviors do great harm to eyesight. And some do not know how to protect their eyesight. Here are some ways to protect our eyes. First, we shouldn’t keep our eyes working for a long time. We’d better look at something far away for some time after we study for a long time. Second, we shouldn’t read in a poor light or in the strong the sunlight. Third, doing eye exercises will help us keep good eyesight.