Eye strain can be a huge issue for anyone who spends a lot of time looking at screens—whether that’s a desktop monitor, a television, or even a smartphone. Improper screen brightness settings can cause your eyes to strain and fatigue, while staring into bright screens at night can make it difficult to fall asleep. Research has shown that exposure to blue light (the kind emitted by electronic screens) at night can disrupt your circadian rhythm, a biological process involved with sleep cycles.