lIt is true that long time focus on cell phone is harmful to eyes, which may cause many eye problems, such as symptoms of dry, sore and blur of eyes. Since cell phones merely have a small screen and strong radiations, too much use of cell phone may also lead to near sight, eye dry sore eyes and so on. Therefore in order to protect your eyes, you can shorten the time of focus your eyes on small phone screen, or just wearing a pair of computer glasses to protect your eyes from radiations when you have to spend a long time on using cell phones.