As ever, it’s good advice to take regular breaks from your screen, look out the window (if you have one), and walk about when you can to vary the distance your eyes are focusing on. Lots of uninterrupted screen time can absolutely irritate your eyes, though the issue may simply be because you’re focusing your attention at a fixed distance for hours on end, and therefore straining your vision. The issue is fuzzier around eye health, though (more on this further down). Harvard Health cites numerous medical studies making a strong case for melatonin suppression by blue light – and specifically recommends people “avoid looking at bright screens beginning two to three hours before bed.” This is great for keeping you active in the late hours for a big project deadline, or if you’re trying to stay awake, but it’s not as great when you’re trying to sleep. The issue is when that blue light comes at times – say, late in the day – that mess with your circadian rhythm, telling your brain that it isn’t yet time to shut down for bed. The important thing to remember is that blue light is a natural part of sunlight, and helps to keep us alert. We wouldn’t be doing our job if we didn’t come armed with some good, hard facts. OLED smartphones emit a lot less blue light than LED displays (Image credit: Shutterstock) Blue light: the science
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