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what is blue light

But too much of it may keep you awake when your body needs to wind down. Studies certainly suggest that blue light can suppress the release of melatonin at night, making it harder to get to sleep or reach deep sleep states needed to fully rest. TechRadar is part of Future US Inc, an international media group and leading digital publisher. This guide will run you through the science around blue light, why some concerns are more valid than others, and the aids currently available to help you out. by You will receive a verification email shortly. Reviewed Blue light has the most power among the spectrum of visible lights to affect your internal sleep-wake body clock called circadian rhythm. Whitney Seltman © 2005 - 2019 WebMD LLC. 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. Blue light is a color in the visible light spectrum that can be seen by human eyes. On the other end of the spectrum, there’s blue light. NY 10036. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. The reason you’re hearing so much about it these days, though, is that LCD screens emit a substantial amount – and our proximity to so many of them, for both our work and leisure, means we’re getting an awful lot of it. The higher brightness of many smartphones these days, though – even those with OLED panels, like the iPhone X – means you might be getting even more blue light than with an older LCD device (via f.lux). How does blue light impact you? Studies show that exposure to blue light … 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. ", However, the UK's College of Optometrists states that "There is no strong evidence that blue-blocking spectacle lenses will improve visual performance, alleviate symptoms of eye strain or improve sleep quality. What is blue light? Both natural and artificial blue light can boost your alertness and mental sharpness. 10/3/2020, University of California, Davis Health: “Is Blue Light from Your Cell Phone, TV Bad for Your Health?”, American Academy of Ophthalmology: “Should You Be Worried About Blue Light?” and “Should You Use Night Mode to Reduce Blue Light?”, American Optometric Association: “In the Dark on Blue Light?”, Proceedings of the National Academy of Sciences: “Evening Use of Light-Emitting eReaders Negatively Affects Sleep, Circadian Timing, and Next-Morning Alertness.”, Harvard Health: “Blue Light Has a Dark Side.”, Chronobiology International: “Amber Lenses to Block Blue Light and Improve Sleep.”, Molecular Vision: “Effects of blue Light on the Circadian System and Eye Physiology.”, International Society for Chronobiology: “Amber lenses to block blue light and improve sleep: a randomized trial.”, PLoS One: “Blue-Light Filtering Spectacle Lenses: Optical and Clinical Performances.”, Journal of Psychiatric Research: “Blocking nocturnal blue light for insomnia: A randomized controlled trial.”, From: 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. Ocushield screen protectors are registered to the Medicines and Healthcare Regulatory Agency (MHRA) in the UK.”, Patel advises us to turn down the brightness on our devices, too: “The brightness on digital device screens also correlates to the intensity of blue light being emitted, if you decrease the brightness of your screen you will again reduce the impact at hand.”. Black Friday deals: see all the best offers right now! That’s led to the creation of a host of blue light filter technologies, which aim to stop blue light reaching your eyes (through specialized spectacles) or possibly even leaving the screen at all (through protective screen filters). additional information. It is also unclear whether blue-light filtering lenses preserve macular health or alter the risks associated with the development or progression of AMD [age-related macular degeneration].". It is intended for general informational purposes only and does not address individual circumstances. Please deactivate your ad blocker in order to see our subscription offer, Today's best blue light blocking glasses deals. Blue light is the same, whether it's coming from the sun or a smartphone, the difference is the intensity and amount of exposure. The filters clearly block out blue wavelengths without overtly affecting the color palette on your screen, meaning you’re not left with off-tone images. Blue light is a short wavelength, which means it produces higher amounts of energy. © Sign Up to Receive Our Free Coroanvirus Newsletter, Medically Ocushield is one company making blue light filters for computer screens or smartphones. “Cumulative exposure to blue light during the day also causes visual stress in the form of eye strain and headaches which a lot of people are unaware of.”, “Ocushield has been specially developed to reduce the spikes in blue light while maintaining a clear image,” said Patel. Blue light is everywhere – but should you be worried? Blue light is a color in the visible light spectrum that can be seen by human eyes. There was a problem. During the day, those natural blue wavelengths help boost attention levels, making us more alert and productive. The important thing to remember is that blue light is a natural part of sunlight, and helps to keep us alert. on It's worth noting that OLED screens – like those used in LG's OLED TVs like the LG CX, or even the Samsung Galaxy S10 smartphone – generally use less blue light than traditional LED lighting technologies too (via FlatPanelsHD). Future US, Inc. 11 West 42nd Street, 15th Floor,

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