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Use Apple’s “Night Shift” to Reduce Blue Light on Computer Display and iPhone, iPad

Blue light from sunlight can cause macular degeneration, but the jury is out as for blue light from computer screens, iPads, iPhone etc—unlikely but not ruled out by science quite yet given the short-term studies and intensive usage by young people today. See Macular Degeneration Linked to Blue Light (sunlight and most forms of LED lights).

Setting aside macular degeneration, the blue tint to the iMac 5K and iPhone and similar devices can irritate the eyes of some people and disrupt sleep patterns, hence the inclusion of Night Shift in macOS.

My elderly father recently was having eye discomfort using his iMac 5K, so I suggested he try warming up the screen color to reduce the amount of blue light (“warm” means more yellow, “cool” means more blue).

On iOS, use System Preferences=> Display => Night Shift.

 
Apple macOS: Enabling blue light reduction via Night Shift

On iOS, use Settings => Display & Brightness => Night Shift.

 
Apple iOS: Enabling blue light reduction via Night Shift
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