Placing the screen too low can lead to tension in the upper neck. Placing it too high (the top should not be above eye level) can also lead to problems.
Possibly even more important is the adjustability of the depth, ensuring an optimal viewing distance. This allows you to better take in information and puts the least amount of strain on the eyes. This optimal screen position works better, more comfortably and increases productivity with 10% when compared to an incorrect positioning (Sommerich et al,1998).