![]() All light disrupts the circadian rhythm, but blue light has been proven to be the most disruptive. Studies have shown that looking at a bright blue screen during the evening hours can confuse the body's biological clock and disrupt our natural circadian rhythm (the ~24-hour light and dark schedule everyone runs on) by suppressing melatonin production, making it harder to fall asleep. Blue wavelengths wake us up, boost our attention, and let us know it's time to start the day.Īt night, blue light is less desirable because that's the time when our bodies should be getting ready to wind down for sleep. With Night Shift, an iPhone or iPad screen will look bright white with a blue-based lighting scheme during the day, but as the sun sets, that bright white will fade into a warm yellow that's easier on your eyes and your circadian rhythm.īlue light, which is the light on the spectrum that makes our computer, tablet, and phone screens look so crisp and bright, is great during the day because it mimics a bright morning. Similar to f.lux on the Mac, Night Shift will automatically change the color temperature of an iOS device's display to reflect the time of day. Night Shift, a major new feature iOS 9.3, is a display-based setting that lets you "warm up" an iPhone or iPad's screen at night to cut down on blue light exposure. ![]()
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December 2022
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