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2. To assess the fit between a person and their work, ergonomists recommended that the optimal
screen position should be slightly below eye level. Viewing angle should be approximately 10°-20°
downward onto the screen’s center. The lumbar (bottom five vertebrate in the spine) needs to be
supported to decrease disc pressure. Sitting in a chair with a backrest that inclines backwards and
has adequate lumbar support is critical to prevent excessive lower back pressures. The
recommended ergonomic seating position to minimize pressures is to sit with the wrists straight at a
90° angle from the floor and seat and knee angle must also be at a 90° angle. Angular adjustment to
reduce reflection on your monitor should range from 5° forward tilt to 15° backward tilt (
See
Figure6-2
).
Figure 6-2