Glare is the reflection on your screen that makes it hard to see the screen clearly. Glare can be caused by sunlight on your screen, or by inside light, such as overhead and task lamps. Simple lighting adjustments can help you minimize glare and reduce eyestrain and headaches.
Position the screen so that it is at a right angle to the window producing the glare.
Close shades, curtains, or blinds if necessary, as light changes during the day.
Tilt the VDT screen down slightly to avoid overhead light from producing glare.
sit with ceiling lights at sides, rather than directly overhead, if possible.
If you use a task lamp, position it to aim the light at your document instead of your screen.
To help improve your viewing comfort, you may also need to adjust your display's contrast and brightness.
Periodically clean your screen to maximize clarity. Characters on the screen should be clear, stable and free from perceptible flicker.
Consider attaching a screen to the VDT if you are unable to eliminate glare by other means.