Dangers of Prolong Use of Computers: Health Risks of Computer Screens on the Human Eyes.

 

Causes

Overuse is the most common cause of repetitive strain from computer screens. It has been shown that people blink less when using a computer, which leads to dry eyes, discomfort and fatigue. Additionally, continually focusing on a visual object a constant distance away, such as a computer screen, can lead to eyesight degradation or impaired eye coordination. Neck and back strain can result from the monitor being at the incorrect viewing angle.

Identification

Chronic dry eyes are a sure sign of computer overuse. If you must resort to using eye drops every day, or several times per day, it is extremely likely you need to consider reducing your time spent at a computer. A recurring dull headache should also be considered a warning sign. A possible neck injury can be identified by an inability to hold the head still for extended periods without discomfort.

Prevention

Operating a computer in an ergonomically sound manner, with regular breaks, can help you avoid repetitive strain injuries. A computer monitor should be positioned so that the top of the screen is slightly below eye level, around an arm's length away and directly in front of you. If the screen is the proper distance away, it should not be necessary to bend the neck to view the entire area. Avoid using a CRT monitor that cannot handle a refresh rate of at least 85 hertz to prevent headaches, or use an LCD monitor. Work in an area that is neither overly bright nor overly dark, with the light source offset from the eyes at a 45-degree angle to avoid glare. Lastly, take regular breaks. Once every hour, a moment should be taken to stand up, move the muscles and refocus the eyes on different objects.

Credits:  http://www.ehow.com/about_5565299_health-risks-computer-screens.html

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