All backlit screens emit blue light. While this makes them easy to see in a dark room, over-exposure can lead to eye strain. Looking at a screen right before bed can also harm your sleep patterns because the brain treats blue light as sunlight, telling your body it’s time to wake up instead of sleep.
To avoid eye strain, consider taking frequent breaks and following the 20-20-20 rule: Every 20 minutes, focus on something about 20 feet away for 20 seconds. This simple exercise can refresh the focus of your eyes and help them feel better.
To fall asleep more easily, try to avoid looking at a screen too close to bedtime. The actual amount of time you need away will vary per person, but a good starting point is 30 minutes.