If you have been sitting in front of your computer screen for a long period of time then you may have a bit of headache, tiredness or burning eyes, this is computer vision syndrome (CVS) and it can be very serious if left unchecked. However, before you start worrying about it, the solution is simple enough, just glance away from the screen occasionally to allow your eyes to rest. There are other things to do too, such as changing the monitor height or angle as well as adjusting the brightness down a bit! There is this handy info graphic that show just how the computer screen can take its toll on the users eyes, it also gives some handy tips on how to overcome some of the issues experienced by long term computer users.
Source [Daily Infographic]