Apps that filter blue light There's a rise of software and apps that claim to filter blue light by changing the color of the screen to a reddish-orange hue (like Apple's Night Shift). "These apps adjust the whole temperature of your screen, which has its benefits in eye comfort, but they affect your color perception," says Grossman. "Digital screens also naturally emit high-energy light, which still enters your eye regardless of blue light-curbing software. These apps do not change the actual LEDs that are producing blue light."
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