eMachines H3120 - Manuel (Page 23)

CHAPTER 3: Using Your Computer www.emachines.com
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Working safely
Before using your computer, read the following recommendations for setting
up a safe and comfortable work area and avoiding discomfort and strain.
Reducing eye strain
Sunlight or bright indoor lighting should not reflect on the monitor screen or
shine directly into your eyes.
■ Position the computer desk and monitor so you can avoid glare on your
screen and light shining directly into your eyes. Reduce glare by installing
shades or curtains on windows, and by installing a glare screen filter on
your monitor.
■ Use soft, indirect lighting in your work area. Do not use your computer in
a dark room.
■ Avoid focusing your eyes on your computer screen for long periods of
time. Look away from your computer occasionally, and try to focus on
distant objects.
Setting up your computer desk and chair
When you are setting up your computer desk and chair, make sure that the desk
is the appropriate height and the chair helps you maintain good posture.
■ Select a flat surface for your computer desk.
■ Adjust the height of the computer desk so your hands and arms are
positioned parallel to the floor when you use the keyboard and mouse. If
the desk is not adjustable or is too tall, consider using a keyboard drawer.
■ Use an adjustable chair that is comfortable, distributes your weight evenly,
and keeps your body relaxed.
Top of screen is not
higher than eye level
Feet are flat on the floor
Hands and
arms are
parallel to the
floor
Screen is perpendicular
to your line of sight