CRT monitors bombards you with the radiation of three electron beams that are continually refreshing the entire screen 60 to 85 times each second. Although your brain doesnâ€@trade;t register the constant refreshing, your eyes do, and they have to work harder to absorb the information. This may cause discomfort, tiredness and headaches if you are sitting long hours on your computer. LCD monitors donâ€@trade;t refresh in this way. Pixels are constantly on or off, which greatly reduces eye fatigue and strain. LCD monitors are highly recommended to anyone who works long hours in text-based applications like word processors or spreadsheets.