Toshiba V1100 - Manual (Page 9)

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Vision Care
All new users of desktop PCs must have vision tests performed before
undertaking computer use, and all users must have vision tests performed
periodically thereafter, to ensure that they have adequately corrected
their vision (if necessary) to satisfactorily handle such work.
An association between bifocal use and vulnerability to neck disorders is
also known to exist. Bifocal use while operating a Toshiba desktop PC
may result in more head movements from keyboard to screen, a
backward declination of the head and increased static loading of the
neck muscles, which could cause neck discomfort. The use of bifocals
reportedly may also result in awkward postural adjustments, which could
cause further discomfort to the body.
Consequently, all individuals who wear bifocals must have vision tests
performed before beginning computer work and must then be evaluated
periodically by a vision-care specialist, to determine whether their
current lenses are appropriate for the computer work that they will be
performing.
Warnings:
a. Always have your eyes examined periodically by a vision-care
specialist, to maintain good vision.
b. Always wear corrective glasses or contact lenses, where required, to
minimise eye-strain when using the CRT monitor.
c. If you wear bifocals, always have vision tests performed before your
first use of this computer, and then periodically thereafter, to protect
against eye-strain and possibly physical discomfort, as well.
d. Always keep your glasses, contact lenses, and the CRT monitor screen
as clean as possible.
e. Always take frequent rest breaks, and relax the focusing system of the
eyes by looking at distant objects, (i.e., objects located at a distance
greater than 4.5 m or 15 feet).
f. If you experience vision-related problems including (but not limited
to) eye-strain, irritation or pain, blurred or double vision, excessive
tears or dry eyes or excessive blinking or squinting, always consult a
vision-care specialist to protect your eyesight.
User's Manual