Is staring at the computer screen bad for your eyes?

WHY is staring at a computer screen for a long time bad for your eyes?

• Is it the brightness? The fact that its close to your face? If I stared at a book close to my face for hours would that also be bad? What happens biologically?

• Answer:

  Its not bad for your eyes long term but it does strain them . The other thing is that for some reason research shows you tend to blink less and then your eyes get dry which makes them sore. With holding things close the muscles which control the lens of the eye have to contract so they eventually get tired if they dont' get to relax by using your far vision. You should always take breaks and readjust to your far vision every so often. It helps to keep the brightness down. Sit with the screen at 90 deg. to a light source. Laptops aren't good for long term use as you can't get teh screen and keyboard adjustmetn correct. Screens shouuld be at arms lenght and the top of the screen level with your eyes. Make sure you drink enough as it keeps you hydrated. Any small imperfections on your vision will also show up more when working on screens so getting an eye test helps.