How we can overcome the difficulties in 1-1 laptop classroom

When we were just starting to use laptops instant of books and notebooks I was really excited and I was expecting better education, better lessons with laptops, but unfortunately there are some difficulties of studying in a 1-1 laptop classroom and sometimes it's even hard to study with laptops. First of all it hurts my eyes. I've noticed that some students play games or visit some other web pages at the lessons and they forget about the lesson and play games or do other thing. I totally understand them, it's hard to concentrate on lesson when there are thousands of your favorite games in front of you. And the student who plays games at lessons makes other good students to play games with them, so at the end the whole classroom is playing games.
So what should we do? What should teachers do with that? How can we overcome the difficulties in 1-1 laptop classroom? These are hard questions.
It's hard to make the whole classroom to stop playing games or visit other social web-pages.
I think it'd be good if the web pages that students visit were limited and restricted. After that children will pay more attention to what teacher says than what the game says on their computer screens.