Both Dr. Bashir and functional optometrist Megan Lott, OD, FCOVD, recommend the 20/20/20 rule. After viewing a screen for 20 minutes, look 20 feet away for 20 seconds. "Your eyes and your visual system were not designed to look at a near target for hours a day, so you must rest your eyes by allowing them to look away," Dr. Lott told POPSUGAR.