There is no doubt that smart phone has been important part of our life. Now when we go out of the house, a smart phone can solve everything. We enjoy the convenience that technology brings, while the overuse of cell phone will be a health hazard.
Recently, my uncle was shocked to find that her daughter's eyes were badly injured after playing smart phone for a long time. My uncle told us that he was busy these days and without his supervisor, her daughter played online game very late. When my cousin felt uncomfortable, the doctor diagnosed her eyesight got very serious problem.
My cousin's situation teaches me a lesson that if we don't use smart phone in the proper way, we will get hurt. There are always some news report people who used smart phone for a long time and their bodies got hurt because they lack of exercise. We need to do some sports and take regular exercise. The sound body is the foundation to realize our dreams, so don't let the smart phone control your life.