It then uses that information to set the color temperature of your display colder during the daytime and warmer in the evening. Many are familiar with the “rods and cones” that provide our visual capabilities, but the retinal ganglion cells containing melanopsin are sensitive to a wide range of “blue-green” frequencies around 480nm.Ī wide range of lights appear to be able to stimulate the circadian system in humans, and so while we refer to “blue light” in order to distinguish it from the light our visual system sees, it includes lights that appear green, blue, cyan, and even orange.ĭid you miss a post? Check the Eye On Apple home page to get caught up with the latest news, discussions and rumors about Apple. Night Shift doesn’t need a separate app, it is a feature of macOS that uses your Mac’s clock and your geographic location to determine whether it’s day or night where you are. ![]() ![]() The science that explains these new systems has accelerated over the last 20 years, with the discovery of a new photopigment in the eye, called Melanopsin, in 1998. We know that night-time exposure to blue light makes people more alert and also affects their circadian timing. ![]() Now if you haven’t used Flux or Night Shift and don’t understand why warmer colors are better for your sleep, see this article from the Flux site:
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