Free app adjusts color on monitors to prevent disruption of sleep cycle


Humans evolved to respond to darkness by producing melatonin, the hormone that regulates the sleep cycle. But our light-sensitive pineal gland near the center of the brain responds to blue light by suppressing melatonin, causing us to wake up, the Washington Post reports. When we see too much blue light in the late evening, it delays or disrupts the melatonin rush. In other words, my iPad can keep me up even after I turn it off. But just as technology can cause this problem, it offers a solution as well. Enter F.lux, a desktop application that adjusts a computer screen’s color throughout the day. During daylight hours, the screen’s undertone is the familiar blue. As sundown approaches, it begins transitioning to a warm shade of red-orange. In the morning, it’s cool blue again…

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