19.It is reported that 300 million people in China have eyesight (視力) trouble.More and more parents hope to save their kids poor eyesight with medicine,or by correcting the ways that kids read and sit. (A) In fact,you should start with the exercise on your feet. First,don't tie your shoes too closely.Try wearing comfortable and soft socks.You can take care (B) your eyesight by walking without socks and shoes at home.While you are travelling,try wearing cloth shoes in order to improve blood circulation(循環(huán)). (C) ,walking on tiptoes (腳趾) is good for your eyesight.It can fight against eyesight trouble.Numbers show that most of ballet (芭蕾) dancers,eyesight is better. Third,rope skipping can also be good for your eyesight.While skipping rope,you have to move rapidly. (D) Skipping rope makes not only the brain but also the eyes excited. (E) Maybe it also helps you grow taller.So start skipping rope now. Besides foot exercises,many eye problems can be avoided if you try some simple steps. For example,it is good to pull your ears.Pulling the ears 20 times rapidly is also a great way.It can keep your eyes healthy.(F)當你空閑的時候,you can have a try. Above all,you should often have doctor check your eyesight.