Blue light is a type of high-energy visible (HEV) light with a short wavelength in the visible light spectrum. It is part of the light emitted by the sun and various artificial light sources. Blue light is known for its stimulating and alertness-inducing properties, which can be both beneficial and potentially harmful.

The primary source of blue light on Android devices is the screen display. Android smartphones and tablets emit this light from their screens to produce vibrant and colorful visuals.

Most Android devices use LED (Light Emitting Diode) backlights for their screens. These backlights emit the light to create the white light that illuminates the screen. The intensity of blue light emitted by LEDs can vary depending on the device’s settings and brightness.

The content displayed on Android devices, such as apps, websites, and videos, can contain varying degrees of blue light. For example, websites with bright backgrounds and certain apps may have a higher concentration of this light.

Android operating systems often include features like adaptive brightness and night mode settings. These features can adjust the amount of blue light emitted by the screen based on the time of day and user preferences.

The importance of addressing blue light exposure for eye health

In our increasingly digital and screen-centric world, the exposure to blue light, especially from smartphones, tablets, and computers, has become a major concern for eye health. Here’s why it’s crucial to address this light exposure:

  1. Digital Eye Strain: Prolonged exposure to digital screens, which emit blue light, can lead to digital eye strain or computer vision syndrome. This condition includes symptoms like eye fatigue, dryness, redness, and blurry vision. It can cause discomfort and reduce productivity.
  2. Sleep Disruption: Blue light, particularly in the evening, can interfere with our natural sleep-wake cycle. It suppresses the production of melatonin, a hormone that regulates sleep. Exposure to blue light before bedtime can make it harder to fall asleep and negatively impact the quality of sleep.
  3. Potential for Long-Term Damage: Some studies suggest that prolonged exposure to blue light, especially from screens held close to the eyes, might contribute to long-term eye health issues. This includes concerns about the development of age-related macular degeneration (AMD), a leading cause of vision loss.

Children and adolescents are increasingly using digital devices, and their eyes are more susceptible to damage from the light due to their clearer lenses. Addressing blue light exposure is particularly important for this age group to protect their developing eyes.

Reducing the light exposure can enhance overall eye comfort, especially for individuals who spend extended periods in front of screens. This is crucial for professionals, students, and anyone who relies on digital devices for work or entertainment.

To safeguard eye health, it’s essential to take measures to reduce the light exposure, especially during the evening and night time hours. This can be achieved through software settings, apps, screen protectors, and adopting healthy screen usage habits. Prioritizing eye health in the digital age is a proactive step toward maintaining comfortable vision and preventing potential long-term eye problems.

With an Android device, there are essentially two ways to turn on Night mode or the blue light filter. You can either utilize some third-party apps or the OEM’s standard built-in blue light filter. If there isn’t a built-in filter, the latter is your only practical choice. Let’s examine both of these choices closely and discover how to use them.

If your device doesn`t support any of the option above there is another way to block the blue light with blue light glasses.

Let’s dive into our options:

Enable native blue light filter in Android Devices

The majority of Android smartphone manufacturers have developed unique user interfaces. The user interface has been altered and customized even though they are based on stock Android. The filter may therefore be available in Night mode, Read mode, etc.

A step-by-step tutorial for turning on the blue light filter on your device is provided below.

You should typically be able to schedule the feature and change the color temperature to your preference. You can modify the color temperature with the Intensity or Opacity options, while the Schedule option lets you schedule when it turns on and off.

  1. Go into your phone settings and open your Display settings.
  2. From here, you should be able to see a section labeled Blue light filterNight shift, or Eye comfort shield, among others. The name changes depending on what phone you’ve got.
  3. Here, you can adjust the color temperature of your screen, turn the blue light filter permanently on, or set a schedule.
  4. When setting a blue light schedule, you can choose between an automatic sunset-to-sunrise schedule or a custom schedule.
  5. If using the sunset-to-sunrise schedule, then your location service will need to be on for your phone to know at which time the sun rises and sets in your local area.
  6. If setting a custom schedule, then you will be able to manually select at what time you would like the blue light filter to turn on and turn off each day.

Use third-party apps

If a built-in blue light filter is not available, you can easily get an app for it from the Play Store. There are thousands of free third-party apps available that will turn on your phone’s blue light filter. A shortcut can be added to the home screen or quick access settings, the filter’s color can be selected, the strength can be changed, and other functions are available in some of these programs. We will go over some of the top third-party apps in this section that are offered on the Google Play Store.

Bluelight Filter

blue light filter

An outstanding program that provides far more than your default blue light filter is called Bluelight Filter. To use as a filter, you can pick from a variety of hues and hue combinations. Many people find the default green filter to be more calming than the normal yellow filter. The filter’s strength is another option. Also, it enables you to add a one-tap button to the Quick access settings and a toggle switch widget to the home screen. We advise everyone to check out this simple and lightweight program once.


twilight blue light filter

Another widely regarded free blue light filter software is Twilight. Both PCs and smartphones can use it. Instead of the conventional yellow light filter, it has a red one. Sliders can be used to change the screen dim, color temperature, and intensity. The app makes the claim that it would enhance melatonin secretion and the sleep cycle.


sfilter blue light filter

Using this app, you may manually activate a blue light filter or schedule it to activate and deactivate at predetermined periods during the day or night. The filter’s hue, opacity, and brightness are all adjustable. To enable the filter without opening the program, you may even build a shortcut icon or widget.

Blue light glasses

Using blue light glasses on all devices offers a multitude of benefits for both short-term comfort and long-term eye health. These specialized glasses effectively reduce eye strain caused by prolonged screen exposure, making it more comfortable to work, study, or enjoy entertainment on digital devices.

By filtering out a portion of the potentially harmful light emitted by screens, they contribute to improved visual comfort, reducing symptoms like eye fatigue and headaches. Additionally, wearing blue light glasses in the evening can promote better sleep quality by minimizing disruptions to the body’s natural sleep-wake cycle.

These glasses are particularly advantageous for children and adolescents, whose developing eyes are more susceptible to the effects of this light. Overall, blue light glasses are a practical and proactive solution to address the challenges posed by our modern screen-centric lifestyles, enhancing both immediate well-being and the long-term health of our eyes.


The advantages of preventing blue light from electronics are apparent, and they include both short-term comfort and long-term wellbeing. Digital eye strain can be considerably reduced by taking proactive steps to decrease its exposure, such as utilizing filters, blue light-blocking eyewear, or changing device settings. In turn, this improves our comfort and productivity while using screens for extended periods of time.

Also, limiting exposure to nighttime helps to maintain a balanced sleep cycle, encouraging improved slumber and general wellness. Safeguarding our eyes against the potential long-term consequences of blue light is a critical investment in our future vision and eye health, especially for children and teenagers. In a time when digital gadgets play a significant role in our lives, reducing the negative effects is a sensible and proactive move that will make using digital devices more comfortable and healthy.

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