# **Used iPhone for a long time, do you know how to turn on eye protection mode?** **If you are using iPhone but do not know how to turn on eye protection mode, please immediately see the instructions on 2 ways to turn on Night Shift below.** Looking at your phone for too long makes your eyes tired, this article will help you fix that on iPhone by turning on eye protection mode (Night Shift) very simply. ## **What is Night Shift on iPhone?** Eye protection mode also known as Night Shift mode is a feature available on the phone. This feature helps protect users’ eyes from harmful blue light on the display screens of electronic devices. Blue light also affects the user’s sleep, halts the production of melatonin, so exposure to blue light for a long time will affect eye health. So this mode is a necessary feature and is built-in on iOS 9.3 and above operating system. This feature helps protect users’ eyes for long-term smartphone use, but is still safe for eyes, avoiding eye strain, especially when used at night. If you are using an iPhone but do not know how to turn on iPhone eye protection mode, please see the instructions on 2 ways to turn on Night Shift below. ## **How ​​to turn on eye protection mode on iPhone** The guide applies to all iPhone models including new iPhone models like iPhone 14. With this mode on iPhone, you can easily turn it on with the following 2 ways : ***Control Center:*** **Step 1: **Open Control Center by dragging down from the top right corner of iPhone, then press and hold for a few seconds on the dimmer bar . **Step 2: **Click **Night Shift** to turn on this mode, you can click again to turn it off. ***Settings:*** **Step 1: **Go to **Settings > Display & Brightness**. **Step 2: **Click on **Night Shift**, turn on **Scheduled** mode. **Step 3: **Night Shift on iPhone by default will be between 22 hours and 7 hours. If you want to change, then you click **this time** and **set at On and Off. **Or you can click on Sunset to Sunrise so that the device turns on automatically when the sun goes down and turns off at sunrise. Above is a guide to using Night Shift mode on iPhone, wish you success.
