There are more problems which can occur from "staring" on screen.
- Eye discomfort
- Itchy eyes
- Dry or watering eyes
- Burning sensations
- Changes in color perception
- Blurred vision
- Difficulty focussing (1, 2, 3)
Ways to minimise damage to your eyes caused by computer screens There
are several ways you can minimise the potential damage to your eyes
caused by looking at computer screens.
Firstly, it is important to set up your computer screen so that it is
in the correct position in relation to your eyes.
As previously mentioned, the top of the screen should be in line with
your eye level. In addition, the screen should be placed approximately
18-30 inches from you.
The screen should also be tilted slightly back – between 10 to 15
degrees depending on the person’s particular preference. This is so
that you do not receive glare from lights in the ceiling. (3, 7)
Glare can also be avoided by placing blinds over nearby windows, or
using a glare screen. (2, 5)
In addition to adjusting the position of your screen, you can also
minimise eye problems by simply blinking more frequently.
Many people don’t realise that they actually blink less when they look
at a screen. (2)
Blinking is important, however, as it washes your eyes in their
naturally therapeutic fluids. (5)
It is also important to take breaks from looking at your screen. One
easy way to remember this is to think of 20-20-20. This reminds you
that every 20 minutes you should try to look at something 20 feet away
for a minimum of 20 seconds. (5)
It is also recommended to take breaks from your screen altogether, in
particular every 2 hours. (2)
Does looking at a computer damage your eyes?
there are many links to find mentioning a "20-20-20 rule."
Computer Eye Strain: 10 Steps for Relief
How to Keep Computer Screens From Destroying Your Eyes