RIGHT Some multifocal wearers find that placing their monitor low helps them to keep their head balanced comfortably over their shoulders.
WRONG Your monitor is too high if it causes you to bend your neck backward to any degree.
TIP: If you are not able to adjust the monitor high enough, consider using an adjustable arm or 
monitor riser. If you cannot adjust the monitor low enough, consider using an adjustable monitor arm.
IMPORTANT: Don’t forget to blink, especially if you experience eye discomfort. On the average, people blink 22 times per minute. Without realizing it, when viewing a monitor, some people slow their blink rate to as little as seven blinks per minute.
●Adjust the tilt of the monitor so that it is perpendicular to your face. To check for correct monitor tilt, hold a small mirror in the center of the viewing area. You should be able to see your eyes in the mirror.
Repeat the above processes in each of your seated and standing positions and each time you move.
TIP: Whenever you use a document holder, place it at the same height as the monitor, and place 
whatever you are viewing the most (the holder or the monitor) directly in front of you. Let the comfort of your head, neck, and torso be your guide.
Scan your head, neck and torso for comfort 13