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Nowadays, you can see many people busy on their smartphones(智能手机) if you look a . Smartphones make our lives easier. But have you ever t about what they mean to your eyes?
Staring(盯) at smartphones for long time gives you dry eyes and even causes a disease c glaucoma(青光眼).
While you’re probably not going to stop using your smartphone, there are a few things you can do to protect your eyes. Hold your phone at least 30 cm away from your eyes when using it. Take a break every h and try the following: look at something at least five meters away from you and then focus on the tip of your nose. Repeat this s times. It should reduce(减少) the discomfort in your eyes.