This is a cartoon story.
There is a boy in the story. He doesn’t know how to protect his eyes. When he is walking, he read books. When he is eating, he reads books too. And when he is sleeping, he reads books in bed! He keeps this bad habit every day. After a long time, he can’t see clearly. He goes to the doctor. The doctor tells him that he is short-sighted. He has to wear glasses. He is very sad.
The story tells us: To protect our eyes we should read books in proper places and in proper time. If we are not careful, we will become short-sighted.