Blink as much as possible to refresh your eyes and protect them from eyestrain caused by computer screens. When you blink, tears are produced, which moistens your eyes. Another way is to practice the 20-20-20 rule where you look at something that is 20 feet away every 20 minutes for at least 20 seconds. Additionally, avoid bright light and excess glare since they can strain your eyes. You may also consider adjusting your monitor so that it's an arm's length away, with the screen's top positioned just below your eye level. Have an adjustable chair to help with positioning. It is best to adjust your screen settings, such as enlarging the type to make reading easier and adjusting the brightness and contrast to a comfortable level. You can also get a document holder to reduce the number of times your eyes have to readjust. Take hourly breaks where you stand, stretch, or move around. Finally, you may consider customized computer glasses, especially if you wear contact lenses.