How much distance has to be maintained from computers?

New Zealand
December 17, 2008 11:38am CST
I have been recently seeing a lot of my friends wearing specks since they are working with computers for a long time. How much distance is advisable to stay away from computers? Did working on computers for a long time ever shown an effect on your eyes? Do you know any one that started wearing specks because of spending a lot of time in front of computers? How much distance do you usually keep away from computer screen?
No responses