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. Sit with your back straight so that your knees, hips, and elbows form approximately 90-degree angles when you work. Do not slump forward or lean back too far. Lighting Proper lighting can improve the visibility of the display and reduce eyestrain. . Position the display panel or external monitor so that sunlight or bright indoor lighting does not reflect off the screen. Use tinted windows or shades to reduce glare. . Avoid placing your computer in front of a bright light that could shine directly in your eyes. . If possible, use soft, indirect lighting in your computer work area. 44 44 44d Selecting a place to work Your LCD display has a brightness approaching that of a TV device. We recommend that you adjust the brightness of your LCD to a comfortable level to prevent possible strain on your eyes. Arms and wrists . Avoid bending, arching, or twisting your wrists. Keep them in a relaxed, neutral position while typing. . Exercise your hands, wrists, and arms to improve circulation. Using the computer keyboard incorrectly may result in discomfort and possible injury. If your hands, wrists, and/or arms bother you while typing, stop using the computer and rest. If the discomfort persists, consult a physician. Work habits The key to avoiding discomfort or injury from strain is to vary your activities. If possible, schedule a variety of tasks into your working day. Finding ways to break up the routine can reduce stress and improve your efficiency. . Take frequent breaks to change position, stretch your muscles, and relieve your eyes. A break of two or three minutes every half hour is more effective than a long break after several hours. . Avoid performing repetitive activities for long periods. Intersperse such activities with other tasks. . Focusing your eyes on your computer screen for long periods can cause eyestrain. Look away from the Getting Started Getting Started Selecting a place to work computer frequently and focus your eyes on a distant object for at least 30 seconds. Your LCD display has a brightness approaching that of a TV device. We recommend that you adjust the brightness of your LCD to a comfortable level to prevent possible strain on your eyes. Other precautions Your computer is designed to optimize safety, minimize strain, and withstand the rigors of portability. However, you should observe certain precautions to further reduce the risk of personal injury or damage to the computer. . Avoid prolonged physical contact with the underside of the computer. If the computer is used for long periods, its case can become very warm. While the temperature may not feel too hot to the touch, if you maintain physical contact with the computer for a long time (if you rest the computer on your lap, for example), your skin might suffer low-heat injury. Never apply heavy pressure to the computer or subject it to sharp impacts. Excessive pressure or impact can damage computer components or ...

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