Night Shift is a feature on iPhone that reduces blue light, adjusts screen color temperature to reduce eye irritation and helps fall asleep. Its core function is to warm and turn yellow on the screen, but it is not a complete eye protection solution. There are two ways to turn on: one is to manually turn on or set the activation time through "Settings" → "Show and Brightness" → "Night Shift"; the other is to add shortcut buttons to quickly switch in "Control Center". In addition, Night Shift supports automatic turn on and off based on sunrise and sunset times. Recommended usage includes: using it to reduce the screen brightness, avoid long-term use, and use it in "dark mode" or "screen usage time". In terms of personalization, the color temperature can be adjusted to "warm" or "cooler" in "Night Shift" and can be customized to enable the opening time, such as automatically running from 9:00 to 7:00 a.m. every night or only enabled on specific working days. Overall, Night Shift is a simple but practical little feature that is suitable for assisting eye protection when using your phone at night.

Night Shift is a feature on iPhone, and its main function is to reduce the blue light emitted by the screen, especially when using your phone at night. This function makes the screen warmer and yellower by adjusting the screen color temperature, thereby reducing the irritation to your eyes and helping you fall asleep more easily.

It is not the whole of eye protection mode, but it is indeed a small feature that Apple has made more practical in eye protection.

How to enable Night Shift function

Turning on Night Shift is very simple, you can operate it through "Settings" or "Control Center":

• Open Settings → Select Display and Brightness → Click "Night Shift"
• Here you can turn on manually or set the daily activation time
• If you like to switch quickly with Control Center, you can go to the Control Center settings to add the "Night Shift" shortcut button

In addition, Night Shift also supports automatic turn on and off according to sunrise and sunset time. You only need to turn on the "Press Sunrise and Sunset" option in the settings.

The relationship between Night Shift and eye protection

Many people think that opening Night Shift is equivalent to eye protection, but in fact it is only part of eye protection.

Blue light does affect melatonin secretion, which in turn affects sleep quality. Night Shift can reduce some of the blue light, but it cannot completely block it. Moreover, if you turn the screen brightness very high, your eyes will still feel tired even if Night Shift is turned on.

So suggestion:

• Use with reduced screen brightness
• Try to avoid staring at your phone for a long time at night
• It can be combined with other applications or system functions, such as "dark mode" and "screen usage time"

Night Shift’s personalized setting tips

Night Shift actually has some small details that are easy to ignore, such as color temperature adjustment.

In Settings → Display & Brightness → Night Shift, you can adjust the color temperature to "Warmer" or "Cooler". Generally speaking, "warmer" is more suitable for use before bedtime, which can further reduce the impact of blue light; if you feel that it is too yellow to affect reading, you can choose a "cooler" tone.

In addition, you can also customize when to turn on every day:

• For example, it is set to run automatically from 9 pm to 7 AM
• Or only on a specific few days (such as on weekday nights)

Basically that's it. Night Shift is not complicated, but it does provide a little protection when you browse your phone at night. Don’t underestimate this yellow filter. After using it for a long time, you will find that it is quite considerate.

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