With the performance of cell phones more and more powerful, children see adults use will also remain extremely curious; sometimes naughty, earn to play with the phone, a long time, the phone has become a child must play with toys every day. I have many such friends around me, often take the phone treats or coax children to play. Children’s visual function development is in a sensitive period, the most suitable light for growth and development is the natural diffuse light during the day, any artificial light and artificial display screen is not conducive to the health of children’s vision. Primary and secondary school children’s bodies and eyes are in a relatively fast development period, look at the time to stare at the cell phone screen prompted eye overdevelopment and cause myopia. Remind young parents not to give their children cell phones as toys. Children do not have self-control over the use of cell phones, it is also recommended not to use cell phones as equipment for students.