Relief for your Eyes and Neck
The Range Monitor Arm enables one or two monitors to be ergonomically positioned for increased comfort and productivity while working. Adjust the height, tilt, distance, and alignment (pdf) of screens to reduce stress on the neck, shoulders, and torso—and to keep eyes from straining to see a monitor that is too far away.
Distance: Place your monitor screen roughly an arm's length (fingertip reach) away. Positioning the screen too far away will cause you to have trouble seeing the monitor and your eyes will pull your head forward causing you to extend your neck; this often leads to neck, back, and shoulder discomfort.
Height (for 1, 2, or 3 Monitor Configurations): Make sure that the top line of your monitor is at or just below eye level. Tilting your head backward to read your screen leads to discomfort.
Height (for 4 or 6 Monitor Configurations): It's ideal to use the bottom row of monitors as your intensive use monitors and the top row of monitors primarily for referencing. Make sure that the top line of the bottom row of monitors is at or just below eye level. Orient the top row of monitors as low as possible without interfering with the bottom row.
Vertical Angle: Adjust the vertical screen angle to minimize glare from windows and other light sources.
Horizontal Angle: Regarding configurations with more than one monitor, for the monitors that are positioned not directly in front of you, adjust the horizontal angle so that they're more perpendicular to your perspective and less parallel to your desk.