Little things with a big effect
Take the strain off your eyes when working with a computer monitor by optimising the monitor settings. Look at the graphics at the top. Can you see 10 different, clearly delineated areas in different shades of grey? The left hand field should be completely black, the right hand one completely white. If this is not the case, adjust the brightness and contrast until you obtain the desired result.
Are straight lines actually shown as straight as possible on your monitor? The lines at the sides of the monitor are particularly important. Most CRT monitors allow you to correct keystone and pincushion distortion. However, you should remember that these self-tests cannot replace a professional eye examination by your optician, optometrist or ophthalmologist.