I don't know if someone has the same problem, but I really have pain in my thingers and arm, because of the work with computer whole day long... And my desk is really small, so I've started notes problems with eyes(((
I experienced those problem before too. But the pain in your thigh and arm is not actually caused by technology itself. Technically, it is caused by your position when working on a computer. The doctor advised me to find a relaxing position and to not remain on the same position for a long time. At least every 30 minutes, change position of your arm and leg.when it comes to your eyes, there is an anti radiation screen that you can buy online and also an anti radiation glasses.