Information for your safety and comfort61Tips and information for comfortable useComputer users may complain of eyestrain and headaches after prolonged use. Usersare also at risk of physical injury after long hours of working in front of a computer.Long work periods, bad posture, poor work habits, stress, inadequate workingconditions, personal health and other factors greatly increase the risk of physicalinjury.Incorrect computer usage may lead to carpal tunnel syndrome, tendonitis,tenosynovitis or other musculoskeletal disorders. The following symptoms may appearin the hands, wrists, arms, shoulders, neck or back:• Numbness, or a burning or tingling sensation.• Aching, soreness or tenderness.• Pain, swelling or throbbing.• Stiffness or tightness.• Coldness or weakness.If you have these symptoms, or any other recurring or persistent discomfort and / orpain related to computer use, consult a physician immediately and inform yourcompany’s health and safety department. The following section provides tips for morecomfortable computer use.Finding your comfort zoneFind your comfort zone by adjusting the viewing angle using a footrest, or raisingyour sitting height to achieve maximum comfort. Observe the following tips:• Refrain from staying too long in one fixed posture.• Avoid slouching forward and/or leaning backward.• Stand up and walk around regularly to remove the strain on your leg muscles.• Take short rests to relax your neck and shoulders.• Avoid tensing your muscles or shrugging your shoulders.• Install the external display, keyboard and mouse properly and withincomfortable reach.• If you view your monitor more than your documents, place the display at thecenter of your desk to minimize neck strain.Taking care of your visionLong viewing hours, wearing incorrect glasses or contact lenses, glare, excessive roomlighting, poorly focused screens, very small typefaces and low-contrast displays couldstress your eyes. The following sections provide suggestions on how to reduceeyestrain.Eyes• Rest your eyes frequently.• Give your eyes regular breaks by looking away from the monitor andfocusing on a distant point.• Blink frequently to keep your eyes from drying out.