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The drawing up of the display
When positioning a monitor shall take into account the viewing distance and the viewing angle. The following factors play an important role in a good positioning of the display: 1. the task that is carried out at that time (reading, typing or mice) 2. ' Blind ' types: when someone can type should not blind the display to be positioned lower, to change between look at keyboard to facilitate and monitor 3. the size of the characters on the screen; at smaller characters can be placed closer to the display 4. the eyes of the user and/or the glasses used
An ergonomic flatscreenarm allows to display at the correct height, depth and angle of view. The viewing distance should be at least 60 cm, but prefer more than 60 cm,. The viewing distance is determined by the font height in which no less than 150 times the viewing distance (and up to 200 times) the character height is, a character height of 4 mm thus corresponds with a viewing distance of 60 cm. A relatively large viewing distance is for the eyes less burdensome, because the eyes have to accommodate, not as strong condition is that the characters on the screen in proportion. The characters on the screen can sometimes be increased, so has become a zoom feature that allows the display of the active document increases or can be reduced.
![]() The entire display must be located in an area 10-20 ° below eye level. At this viewing angle can better accommodate and converge the eyes, and the overall tax take for the eyes. In addition, this monitor position to less discomfort and complaints to the neck, while it does not lead to a static load of the neck muscles. Sommerich et al., (1998) has examined productivity in relation to the viewing angle. He found a 10% higher productivity when the middle of the monitor 35 ° below eye level was posted (the test subject had to a column with references on the right side of the screen compared to a column on the left side and the differences, the number of references that was changed was the measure of productivity).
So there is not one fixed optimal screen position, but the viewing distance depends on the size of the letters on the screen and is so not all day right. And the optimal height depends among other things on the sitting position, and it is not wise to sit in the same position all day. A flatscreenarm with gas spring can improve, because the screen is gewichtlos, as it were, and so can be positioned in a fast and easy way.
Author: Hugo Forest – Manager Ergonomics at BakkerElkhuizen |
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