Computer in classroom

I think computer in classroom is has advantages and disadvantages. The advantages things its easy to get any information, eg: search for meaning. Also its good to keep document like we can save any document and classroom and working. there are disadvantages things that when we use the computer for a long time its not good for eyes, and maybe some of the students will use computer games and that west of time, and I think the students going to loss concentration while computer in the class.