It might be fun to use your smartphone. But be careful that too much screen time may be harmful to your health.
First, it is bad for your eyes. A researcher called Sarah Hinkley says the problem comes from the blue light that the screen gives out. Looking at a smartphone for a long time can cause eye strain, headaches and dry eyes. So it is a good idea to take a break every 15 minutes when you are working at a computer or using a smartphone.
Second, screen use can do harm to children’s brains. A new study shows that using screens too much can influence how children’s brains grow. If children use screens for more than one hour a day, they might have lower levels of white matter in their brains, which is a key to the development of language and reading skills. So it is wise to cut down the time of children using all kinds of screens.
Third, using screens too much will influence your sleep. According to a study, about 95% of the people between the ages of 13 and 64 use electronics before bed, especially the young people under 20. Doctors say that the light from those electronics at night may make you excited before you go to bed. Then it’s hard for you to get enough sleep. So you’d better turn off smartphones, TVs and all other screens an hour before your bedtime.
To keep healthy, doctors and researchers strongly advise that you shouldn’t use screens for long hours.
【小题1】What can the blue light from your screen cause?【小题2】How often should you take a break when working at a computer or using a smartphone?
【小题3】How can parents prevent levels of white matter getting lower in their children’s brains?
【小题4】Do you think smartphones are important? Why do you think so? Write 30 words or more.
