Acer C720 Chromebook User Manual page 31

Pain, swelling or throbbing.
•
• Stiffness or tightness.
• Coldness or weakness.
If you have these symptoms, or any other recurring or persistent discomfort
and/or pain related to computer use, consult a physician immediately and
inform your company's health and safety department.
The following section provides tips for more comfortable computer use.
Finding your comfort zone
Find your comfort zone by adjusting the viewing angle of the monitor, using
a footrest, or raising your 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 within
comfortable reach.
• If you view your monitor more than your documents, place the display
at the center of your desk to minimize neck strain.
Taking care of your vision
Long viewing hours, wearing incorrect glasses or contact lenses, glare,
excessive room lighting, poorly focused screens, very small typefaces and
low-contrast displays could stress your eyes. The following sections
provide suggestions on how to reduce eyestrain.
Eyes
• Rest your eyes frequently.
• Give your eyes regular breaks by looking away from the monitor and
focusing on a distant point.
• Blink frequently to keep your eyes from drying out.
Display
• Keep your display clean.
• Keep your head at a higher level than the top edge of the display so
your eyes point downward when looking at the middle of the display.
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