User`s guide

Safety and Health Information
106
PowerCenter Pro User’s Guide For Technical Support, Call 1-800-708-6227
Preventing eye strain
Whenever you focus your eyes on a nearby object for a long time — whether
you are reading, sewing, or working on a computer — your eyes can get tired.
Follow these suggestions to prevent eye strain:
■ Take frequent breaks. Periodically look away from the screen and focus
your eyes on something farther than 20 feet away.
■ To prevent glare on the screen, avoid working with a window or light
source behind you. Turn off lights or close drapes if necessary.
■ Place your monitor, chair, and work table so that the top of the monitor is
slightly below the top of your head and the screen is 18-28 inches away
from you. This may require placing something under the monitor.
Preventing discomfort and fatigue
Like any activity that involves sitting for long periods of time, using a
computer can make you tired and stiff. In addition, using a keyboard and
mouse improperly can sometimes be associated with RSIs (repetitive stress
injuries), particularly in the wrists. Follow these suggestions to prevent
discomfort:
■ Take frequent breaks. Stand up, stretch, and walk around. These breaks are
not wasted time. They help you work more effectively in the long run.
■ Adjust your chair so that your lower back and thighs are supported and
your feet are flat on the ground (or on a footrest).
■ Adjust your chair and work table so that you can type and use the mouse
with your elbows at a 90
° angle, your forearms level, and your hands in a
straight line with your forearms. A work table equipped with an adjustable
keyboard tray may make this easier.
■ Do not place your wrists on the hard edge of your table. Use a wrist pad.
■ Sit up straight in your chair. Slouching puts unnecessary strain on your
back.
■ Do not strike the keys any harder than necessary.
A Health/Safe Page 106 Friday, June 6, 1997 10:12 AM