Today's society increasingly developed, information technology also was very popular worldwide. But not this is totally useful. Because information technology development, products such as computer, smartphone, Ipad, ... also many phrases. The teenagers were dependent on the computer too much. They spent all free time to play games on the computer and it can cause many harmful effects such as myopia. The majority of children today are suffering from myopia because sitting too long in front of your computer. The brightness of the computer and the radiation exit can cause blurred vision and dry skin. Too much computer use can also pose the risk of obesity and affect bones because children don't go out campaigning, the food will accumulate to cause overweight and the bone is affected causing the diseases of the spine. In addition to play too many computer can be restricted development thinking, playing games will control the child focus thoughts on the game, not to Italy around innovative ability decreases. If any are free time playing the computer will do little to take contacts with people, do limit the ability of communication, will have great harm for the child's future. Đó là đối với giới trẻ ngày nay, còn tác hại của máy tính đối với những người làm việc và tiếp xúc với máy tính cả ngày còn nghiêm trọng hơn nữa
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