I believe we all bought laser pens to play with when we were children. I once took a laser pointer and only shone it in my eyes for about two or three seconds. Then my eyes were very uncomfortable and a little painful in those days. Finally, I had no choice but to go to the hospital to buy eye drops, and then ordered eye drops. It took many days to get better.
It is conceivable that if you aim the laser pointer at people's eyes at a concert, it will bring serious harm to others. Moreover, if you point a laser pointer at people's eyes at a concert, it will take at least 5 or 6 seconds, and even worse, sometimes it will take more than ten seconds.
Moreover, this kind of behavior will not only hurt people's eyes, but also show great disrespect to others. After all, people are singing hard on the stage. Although you pay for it, you should also respect the fruits of other people's labor to a certain extent. If you don't want to watch it, you can choose to sleep or play with your mobile phone directly, but don't do such unqualified behavior. If you cause serious harm to others, you may face legal sanctions in the future.