Check the Lighting
Glare is the reflection off your screen that makes it hard to see the screen clearly. Glare can be caused by sunlight on your screen. Or it may be caused by inside light, such as overhead and task lamps. Simple changes can help you lessen glare and reduce strain on your eyes. Adjusting your screen's contrast and brightness can also improve viewing comfort.
Controlling light from windows will help you reduce glare on your screen. So will adjusting the angle of your monitor.
Controlling light from ceiling lights and task lamps can also help reduce glare on your screen.
► Light from Your Computer