There are al ot of people that have myopia.It seems that most prople who has myopia doesn't care about there eyes.Myopia is harmful to you eyes if your eyeglasses is in high degree.
If you have myopia,then you can't see things from a far away distance.would you feel comfortable if you can't see things?Besides,your eyes will get worster and worster if you keep looking at things closely.
For some prevention of myopia,you should go to the doctor and ask for advices.Besides,you must correct your study or work habits.Such as stop looking at things closely,take a eye break after a while of studying or working.
As you can see,myopia is harmful,you must prevent for myopia immediately and keep up your normal eyes.