The visual quality of the computer display can be very important
for your visual performance and comfort. Following are some tips
and suggestions about displays and how to use them in order to be
as comfortable as possible.
- Flat panel (LCD) displays have visual advantages compared to
cathode ray tube (CRT) displays. They do not flicker and the
contrast is typically higher.
- Optimal contrast and visibility are attained with black
characters on a white background. However, other
combinations can be comfortable so long as the brightness
contrast between the characters and the background is high.
It is best to avoid dark backgrounds.
- The size of the text should be three times the size of the
smallest text you can read. You can test this by viewing the
screen from 3 times your usual working distance-you should
be able to read the text from this distance. If you cannot read
the text from this distance, then you should increase the size
of the text and/or obtain an eye examination.
- The refresh rate (flicker) of most CRT displays can be
adjusted (start/settings/control panel/display/settings). It is
best to set the refresh rate as high as possible, 60 hertz is often
too slow, 85 hertz or higher is recommended.
- For color monitors, smaller dot pitches (less than 0.28 mm)
are desirable.
- Adjust the screen contrast so that the characters on the
display are at their clearest.
- The screen brightness should be adjusted to match the general
background brightness of the room.
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