Computer Health

There are 5 steps to use computer safely.
1. Place the keyboard in a position that allows the forearms to be close to the horizontal and the wrists to be straight.
2. Adjust the seat tilt so that you are comfortable when you are working on the keyboard.
3. Set the eye-to-screen distance at he ditance that permits you to most easily focus on the screen. Usually this will be within an arm's length.
4. Place the document holder close to the monitor screen in the position that causes the least twistiong or inclination of the head.
5. Adjust the height of the work surface and/or the height of the chair so that the work suiface allows your elbows to be bent at 90 degrees, forearms parallel with the floor, wrist straight, shoulder relax.