Computer service of benefit to us but also comes with some unwanted impacts that we can not know
+ Impact on sleep: light emitting pigment rich from the computer to prevent muscle can secrete melatonin, makes operation metalonin biological clock of the body, so the body do not have a reasonable bed time
+ effects on ability to remember: we used to memorize and retain large amounts of information but believe in the brains of modern computer technology gradually eliminate this possibility
+ may not find their way without GPS: GPS depends on us forget how to remember and orientation
+ Influence body muscles by sitting too long causing aches
+ affect eyesight by using eye for a long time causes eye fatigue and decreased vision
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