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Dear Li Hua, You’re very kind to Care about your classmates. Dear Li Hua, You’re very kind to care about your classmates. Now I will give you some advice on how to protect your eyesight. If you want to protect your eyesight, I advise you to Jet your eyes rest after a certain, amount of time of work.You should do eye exercises every day, at least twice a day.You should, go to the hospital to have an eyesight examination regularly, at least once a year.You mustn't read while lying in bed , in too bright or dark light or in a moving vehicle.You'd better not rub your eyes with your hands; and it is bad for your eyesight if you wear coloured glasses. I hope my advice can help you and your classmates. Yours, Dr Helper