When working on a computer there are several basic steps that will help your eyes ...
First, get the lighting right.
Avoid reflections on the screen and low ambient light.
Next, make sure the monitor is at the right level.
Lowering the screen will allow your eyelid to close slightly ...
Keeping the eye moist.
Take a few moments every few minutes to look away from the screen and blink ...
and take regular breaks away from the screen.