Apple Workgroup Server 8550 - Manual (Page 91)

RSIs did not suddenly arise when computers were invented; tennis elbow and
writer’s cramp, for example, are two RSIs that have been with us for a long
time. Although less common than other RSIs, one serious RSI discussed more
often today is a wrist problem called carpal tunnel syndrome, which may be
aggravated by improper use of computer keyboards. This nerve disorder
results from excessive pressure on the median nerve as it passes through the
wrist to the hand.
This section offers advice on setting up your work area to enhance your
comfort while you use your computer. Since the effects of repetitive
movements associated with using a computer can be compounded by those of
other work and leisure activities to produce or aggravate physical problems,
proper use of your computer system must be considered as just one element
of a healthy lifestyle.
No one, of course, can guarantee that you won’t have problems even when
you follow the most expert advice on using computer equipment. You should
always check with a qualified health specialist if muscle, joint, or eye
problems occur.
Eye fatigue
Eye fatigue can occur whenever the eyes are focused on a nearby object for a
long time. This problem occurs because the eye muscles must work harder to
view an object that’s closer than about 20 feet (6 meters). Improper lighting
can hasten the development of eye fatigue. Although eye fatigue is annoying,
there’s no evidence that it leads to permanent damage.
Whenever you’re engaged in an activity that involves close-up work—such
as reading a magazine, doing craft work, or using a computer—be sure to
have sufficient glare-free lighting and give your eyes frequent rest breaks by
looking up and focusing on distant objects. Remember to have your eyes
examined regularly.
To prevent discomfort and eye fatigue:
m Arrange your workspace so that the furniture is properly adjusted for you
and doesn’t contribute to an awkward working posture.
m Take frequent short breaks to give your muscles and eyes a chance to rest.
82 Appendix A / Safety, Maintenance, and Health Information