It's widely believed that the emitted blue light from phones disrupts melatonin secretion and sleep cycles. To reduce this blue light emission and the strain on eyes, Apple introduced an iOS feature called Night Shift in 2016; a feature that adjusts the screen's colors to warmer hues after sunset.

Is night shift better for your eyes?

It reduces the blue light emitted by your phone/tablet's display, which should, ideally, reduce the strain on your eyes while you're using the device late at night. And basically every Android phone maker soon followed suit with a similar feature.

How bad is working night shift?

A person working night shift, which causes disruption to the circadian rhythm, is at greater risk of various disorders, accidents and misfortunes, including: Increased likelihood of obesity. Increased risk of cardiovascular disease. Higher risk of mood changes.