How do you know if you have myopia?

Squinting means that your eyesight has decreased and you can't see clearly. This is a sign of myopia.

I suggest you find an optical shop nearby for an eye test, which is usually free. If you can't see clearly above 5.0, it is myopia.

In the early stage of juvenile myopia, most of them are pseudomyopia. The main reason is that reading and writing for too long, the posture is wrong, the sight distance is too close, and good eye habits have not been developed. My Baidu space has knowledge and content about preventing myopia, so I might as well have a good look. Keep at it, and your eyesight will recover.