An lcd monitor brightness and contrast levels has to be set correctly to prevent eye strain. Lately, I’m been getting headaches and nerve strain around my eyes staring at my screen. It’s a 24 inch LCD monitor we bought recently and I might have adjusted it too bright and glaring. In less than a week, my eyes are telling me I need to tone down the brightness and contrast levels too. Perhaps, it’s also telling me to cut down on time spent computing. But after some tinkering, I’m now feeling a lot better. My eyes are more comfortable and less likely to get tired or strained after a short while.