It is easy to get so absorbed with work and forget to rest your eyes every 20 minutes. However, we dug around a bit and found some apps that are designed specifically for this exercise. You can also set a timer on your smartphone to go off every 20 minutes.
If you wear contact lenses, your eyes are bound to get dry and irritated quicker and more often than that of those who do not wear contact lenses. So give your eyes a break from time to time by wearing glasses. Also, to prevent eye strain, avoid sleeping with your contact lenses still on.