First of all, the quality of eyesight has a great relationship with physical fitness. Just as myopia and hyperopia can be inherited. Some people are born with poor eyesight, and some people are born with good eyesight, just like some people are not fat when they eat black silk.
Second, the quality of eyesight has a great relationship with the living environment. If the environment for playing games every day is spacious and bright, and the game screen is moderately bright and dark, the impact on vision will be less. If you play with your mobile phone in the dark every day, your vision will deteriorate faster and faster.
Third, rest your eyes. Some people always forget the time when playing games and don't know the rest of the eye protection, so their eyesight is getting worse and worse. And those real game masters, game players, pay great attention to eye rest and maintenance. This is why you see them playing games for a long time, but their eyesight has not deteriorated significantly.