How harmful is it to play mobile phone before going to bed?

Damage to vision, mobile phones and other electronic products, the impact on people's vision is also considerable. Especially playing mobile phones for a long time before going to bed will cause visual fatigue. If the discomfort of the eyes is not relieved in time, it will cause pseudomyopia. In the long run, it will become true myopia. In addition, people are always used to playing mobile phones in bed, lying left and right, which puts the greatest pressure on their eyes. After a long time, it will cause vision deviation in their left and right eyes.