By respectively. If we use the eyes with continuous screen more than 3 hours / day will cause blurred eyes, dry eyes, burning eyes, fight light, which is a danger signal that you don't know it. And if we look more and more.Syndrome, which also had symptoms of eyes. There are symptoms of muscle, such as headaches, sore shoulder, neck, if a lot of pain may cause insomnia and relax is not enough, and cause other diseases that followed.
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