First of all, it is not recommended to use cell phones, computers and other video terminals for a long time, in the light, the human eye staring at the screen for a long time is prone to visual fatigue, eye dryness and so on. Especially for children and young people in the process of growth and development, it is easier to make the ciliary muscle in a state of tension and spasm, in the long run will cause myopia. It is recommended that when using electronic devices to pay attention to the combination of work and rest, avoid looking at the screen in the dark or turn off the lights after the strong light. When you feel fatigued, you can take a rest with your eyes closed or look into the distance, or do some eye exercises. If you are already nearsighted, you need to wear glasses with the appropriate prescription, and improve your eye habits. Don't use cell phones or computers in the dark, as the strong light can easily damage the macula at the bottom of the eye.
In the case of children, parents need to help establish good eye habits and cell phone use. If you want your child to stay away from cell phones, you need to set a good example and be firm and let your child understand that you will never stop playing with your cell phone, so that your child will stop playing with it over time.