Women who only work nights have a 50% increased risk of moderate to severe asthma compared to those on the day shift, ...

Tap the Night Shift icon to turn the setting on. How to Turn Night Shift on in Settings. To adjust blue light on your iPhone based a schedule, open Night Shift options from Settings.

Quick tip: To turn Night Shift on, press and hold the sun icon, and tap the Night Shift icon in the bottom center. From Settings: 1. Open the Settings app. 2. Tap Display & Brightness.

If you're not using Night Shift — an iPhone display feature introduced by Apple way back in March 2016 with the release of iOS 9.3 — it's time to start. Studies have shown that by allowing ...