The document provides guidelines for proper monitor positioning to avoid eye strain and fatigue, recommending that the monitor be 20-40 inches from the user, with the top of the screen at or slightly below eye level, and positioned directly in front of the user within 35 degrees left or right to avoid neck strain. It also notes the importance of periodically looking away from the screen to rest the eyes.

1. Monitor Considerations

2.  Monitor should be 20 to 40 inches away

3.  Distances that are too long cause you to
lean forward and strain to read small text.
This fatigues the eyes and puts stress on
the torso
 Distances that are too close can make
your eyes work harder to focus

4.  Topof monitor should be slightly below eye
level

5.  Working with the monitor either too high or
too low can put strain on the neck muscles

6.  Bifocal
users tend to view the screen
through the lower part of their glasses and
may need to lower the monitor

7.  Place the monitor directly in front of you

8.  Ifthe monitor is more than 35 degrees to
the left or right you will place strain on the
neck muscles which can cause fatigue.

9.  Extended periods of viewing the screen
can cause eye fatigue and dryness
 You should rest your eyes periodically by
focusing on other objects
 You should also look away and blink to
moisten the eyes

10.  Keep the monitor perpendicular to your
line of sight
 Monitor should be tilted no more than 10 to
20 degrees

11.  Tilting the monitor too far can distort the
image
 Overhead lights can cause glare if the
monitor is tipped too far
 Monitor should also be perpendicular to
windows to reduce glare

12.  Put monitor directly in front of you at least
20 inches away
 Place monitor so the top of the screen is at
or slightly below eye level
 Place monitor perpendicular to windows
Source United States Department of Labor OSHA
OSHA Ergonomic Solutions: Computer Workstations eTool -
Components - Monitors