In the current technology age, most people from old to young use social networks for entertainment, for work or updating information, ... Does that affect their health? I don't? The answer is of course yes. Because it will be so much harmful to our eyes. Especially among the young because you watch a lot. On social networks, although there are many good things to do, but also many bad things behind. For example, when young people watch fighting videos or clips, you may go out and fight with everyone. In addition, it is also possible that young people will be obese due to watching too many TVs, phones, computers, ... and may also have autism. From there, it can also be seen that showing children to many social networks is not very good. So need to extend the viewing time and choose the best videos for children. It is not good to let children watch TV regularly both at school and at home because it will make children eyes near early and greatly affect learning.