Using a computer in the workplace can be a very simple task, but it can cause a strain on your eyes. Avoiding simple things like computer stare and sitting too close to the screen can help prevent this. Computer stare is when an individual forgets to blink for an extended amount of time while looking at the screen. When sitting at the computer you want to follow the 20×4 rule. You want to keep your eyes at least 20 inches away from any screen, take a 20 second break every 20 minutes to look at something at least 20 feet away.
The overhead lighting at your computer can also cause a strain on the eyes if the overhead light is brighter than the light coming from the computer screen. You need to make sure that you keep your monitor up to date, old computer monitors that have low-resolution screens are hard on the eyes.
A persons posture can affect the strain, how one sits, the chair that you use, and having the mouse too far away. One needs to make sure that they sit with straight posture and be sure to not turtle over with their back rounded leaning towards the screen. Make sure that you use a chair that has good support and when using the mouse, keep it close to you and not by the computer screen.