Using smart phone all the time can cause external recognition of our people. In general, the human brain couldn't divide the work greatly at the same time. So the brain's performance is reduced while playing a smartphone. Which could cause an accident with both ourselves and others. It is reported that people use the Internet and communication system online per week at the 50.4 hours per week
its means people spend time with computer or smartphone with an average 7.2 hours per day. May result in harmful to health because the light on the screen consists of a light blue, which affects retinal directly.