The Safe Distance
So, for computer users, what is the safest viewing distance to use with your VDU?
A typist, with a VDU about 30 inches from his eyes, feels comfortable. However, ergonomics suggests the most comfortable distance for eyes is between 21 and 27 inches. The experts say that closer objects cause greater strains on the eyes’ muscles.
It is obvious that if we can’t read something on screen clearly, we need to make some adjustment. We can have either of two situations:
1) The font or screen size can not be further increased/decreased. In this case, only thing we can do is increase or decrease the distance of the VDU from our eyes until we can see more clearly.
2) The font/screen can be increased or decreased. Now the first step that should be taken is to check distance between our eyes and the VDU. If there is already a good gap, we may then consider changing the font or the screen resolution until the view becomes clear.
VDUs can easily cause short-sightedness or eyestrain due to the unnecessary closeness with which they are commonly viewed. The further out the VDU is, the more relaxed the eyes will be.
Some might think that they cannot place the VDU at the correct distance because the cables of the keyboard or mouse are not long enough. In this case, wireless computer devices such as Wi-Fi or Bluetooth keyboards and mice can be used that would allow the user to have more room and place at the right distance.