Your eyes may feel tired, sore, burning, itchy, or gritty. They may be red and you may have difficulty focusing clearly on images on the screen or focusing back and forth between the screen and a document you re working on. Eyestrain can also cause headaches, neck or backaches. If you have noticed any of these symptoms you may have worried about the long-term effects on your eyesight. Many people put their monitors on top of the computer which will cause it to be too high.
Most people are too close to their monitor.
Same premise here- try to move your monitor back to at least 2 feet or even 2 ft. away. A clean screen reduces glare. And while you re at it, how about your keyboard and the rest of your work center- less dust causes less eye irritation. Your keyboard should be directly below the monitor. If you have to look toward the left or right it will cause even more eyestrain by overusing certain eye muscles.