The best blue light blocker of 2021

More and more people are already aware of the dangers of blue light.
The question is how do we block blue light?

In this article, I will introduce the best blue light blocker of 2021.

What is blue light

Blue light is light with a relatively high energy wavelength between 400nm and 480nm. It is part of the visible spectrum and can penetrate the lens directly to our retina. If this happens, it will cause irreversible visual damage and even cause eye diseases.

What are the sources of Blu-ray?

Blue light can be seen everywhere in daily life, including computer screens, tablet computers, smartphones, energy-saving LED lighting, fluorescent lamps, and televisions.
Now our lives can no longer leave these devices, especially many people need to use computers for 8 hours a day, which will expose us to blue light excessively.

The harm of blue light

  • Digital eye fatigue:

Blue light is easier to scatter than other visible light and is not easy to focus on. This visual “noise” when looking at digital devices reduces the contrast and causes digital eye fatigue. You may experience eye fatigue, headache, blurred vision, dry glasses, neck and shoulder pain.

digital eye strain

  • Age-related macular degeneration:

Blue light can damage the light-sensitive cells in the retina, and may also cause age-related macular degeneration, which can lead to permanent vision loss.

  • Circadian rhythm disorder:

Since birth, humans have been accustomed to sunset = darkness = sleep. But since the invention of artificial light, people’s sleep time began to decrease.

Among all kinds of artificial light, blue light has the greatest impact on human sleep. Blue light inhibits the production of melatonin in the body.

Melatonin is a hormone produced by the pineal gland, which helps your body know when to sleep and wake up.

Usually, at night, your body produces more melatonin. Once the sun starts to go down, the level of melatonin secretion will start to rise. This indicates that the body is ready to fall asleep. When the sun rises, the level of melatonin secretion will begin to decrease and the body gradually began to wake up. Excessive exposure to blue light at night and insufficient melatonin secretion in the human body will keep people awake and unable to fall asleep, which causes the problem of insomnia.

Researchers at Harvard University and colleagues conducted an experiment comparing the effects of 6.5 hours of blue light exposure with green light exposure of comparable brightness. Blue light inhibits melatonin for about twice as long as a green light, and the circadian rhythm changes twice (3 hours vs. 1.5 hours).

In another study on blue light, researchers at the University of Toronto compared the melatonin levels of people exposed to bright indoor light and wearing anti-blue light goggles with those who were exposed to regular dark light without wearing goggles. Human melatonin levels.

The fact that the hormone levels in the two groups are roughly the same strengthens the hypothesis that blue light is an effective inhibitor of melatonin

How to block blue light?

The best way to block blue light is not to use mobile phones, computers, and other devices, but in this modern society, people’s work and life are inseparable from mobile phones and computers.

A good way to block blue light is to use blue light blocking software.

CareUEyes is one of the best blue light blocking software.   It blocks blue light by adjusting the color temperature. The lower the color temperature, the less blue light. If you adjust the color temperature to the lowest, it can almost block all harmful blue light for you.

Blue-Light-blocker

 

CareUEyes has designed eight preset modes according to the most commonly used scenes in people’s daily life, namely health, games, movies, office, editing, reading, custom and pause modes, and can freely adjust the blue light blocking rate arbitrarily according to the sensitivity of individual eyes.

During the day, you need proper blue light to stay awake so that you have the energy to complete your work or study. Therefore, if you are not a person with extremely sensitive eyes, you only need to block a small part of the blue light during the day and restore the light of the computer screen to light similar to daylight.

But at night, blue light becomes very harmful, you need to block more blue light to prevent sleep from being disturbed by blue light.

According to people’s different needs for blue light day and night, CareUEyes provides sunrise and sunset functions. Compared with the sunrise and sunset, the color temperature and brightness after sunset are lower.

You only need to turn on the sunrise and sunset function, CareUEyes will automatically help you adjust the color temperature and brightness at sunrise and sunset.

More eye protection features

  • Adjust the screen brightness:

the brighter the screen, the more blue light will be emitted. Therefore, properly adjusting the brightness of the screen can also help reduce blue light. And too bright screen light is also a direct stimulus to the eyes, which can cause eye fatigue.

bright screen

 

You need to adjust the brightness of the screen appropriately according to the light of the surrounding environment. But adjusting the brightness of many computer screens does not seem to be an easy task, especially pc computer screens. Because many PC screens do not have shortcut keys to adjust the brightness, people can’t find a switch or entrance to adjust the brightness.

In the main interface of CareUEyes, you can directly drag the progress bar to adjust the screen brightness, or you can adjust the brightness in the tray right-click menu. It also supports custom hotkeys to quickly adjust the brightness.
  • Regular rest:

Under normal circumstances, ordinary people blink 10 to 20 times per minute. Blinking can make tears evenly distributed on the surface of the cornea so that the cornea will not become dehydrated and dry. The main function of blinking is to protect the eyeball and moisturize the cornea. But when we concentrate on looking at the computer screen, the blink rate will be greatly reduced, only blinking 3 to 8 times per minute. Therefore, many people experience dry and sore eyes after using the computer for a long time.

Rest-Notify

You need to take some time to rest your eyes every 20 minutes or so. Stay away from the computer and focus on distant things, such as trees outside windows or office corridors. Gently close your eyes, then squeeze and hold for a while, then open and relax them.

But many people often forget to stop work to rest their eyes because of their busy work. CareUEyes has the function of reminding you to rest regularly, so you will never miss a rest again.

How to activate CareUEyes Pro – Sendowl

    1. First, you need to purchase a license at https://care-eyes.com/buy.html.

    2. After successful purchase, you will see the license code on the payment completion page, at the same time, the system will automatically send the license code to your mailbox, if you forget the license code, you can also retrieve it in the mail.

      sendowl payment

    3. Open CareUEyes, switch to the Activate tab, then paste the license code into the edit box and click Activate to complete the activation.

      activate
    4. After successful registration, the Activate tab will automatically disappear.

      license activated
    5. Congratulations, you have become CareUEyes Pro edition of the user.

This is the activation demo

activate demo

break reminder

People who have to work with computers in their daily lives and that covers most of us have started to become aware of the injuries caused to the carpal tunnel by strenuous work on the keyboard. There is a simple way to avoid it – take regular breaks and stretching your arms every few hours. Just like your shoulders, back, neck and the arms, you should also take care of the eyes.  If you forget to do so, CareUEyes break reminder feature can ensure that you don’t forget to rest every now and again, by displaying desktop notifications for a specified amount of time.

Download

The work and rest periods are fully customizable, and you also have the option of enabling a desktop timer that lets you keep track of how much time you have left until a break is due, and you can also choose to disable this feature.

break reminder

If you want to ensure that you don’t keep skipping breaks when you have a lot of work to do, you can enable the “Force rest” feature, which prevents you from using your PC until the break is over.

CareUEyes break reminder feature forces you to take 3 minutes rest every 45 minutes by locking your PC for 3 minutes. You can customize this timer, and change the duration of rest and the frequency at which it appears. It gives you a form of snooze function so that you can delay the rest for a few minutes.When the rest time is 30 seconds away, it will show you a notification. On the notification popup, you will also see the option to delay the rest time by 3 and 5 minutes, as shown below

rest notify

lock screen wallpaper

When the timer runs out, the software will lock your PC automatically for the time interval which you have selected as the rest time. The lock screen will simply show your desktop wallpaper along with the rest time remaining. If you want to continue your work, then simply hover the mouse cursor at the center of the screen and click on “Continue Work” button.

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blue light filter for laptop

Are you looking for a suitable blue light filter for your laptop?

You have come to the right place.

Next, I will show you the best blue light filters for laptops.

What is a blue light filter for the laptop?

A blue light filter for the laptop can be a physical barrier that can block blue light (work by preventing the passage of blue light between 380nm~495nm), such as screen protectors, anti-blue glasses, or software (by controlling the color temperature of the display). It works by adjusting the amount of blue light emitted.

Blue light filter screen protector for laptopsblue light filter for laptop

The screen protector is a transparent plastic material covering the display, which reflects harmful blue light through a surface coating.

Many screen protectors have reflective problems. If you have a light or window behind you, it will turn your computer screen into a mirror.

Also need to pay attention to the transmittance of the protective laminate, if the transmittance is insufficient, it will affect the clarity of the screen.

In addition, the adhesion of some screen protectors to the display is not good, which causes the display to be blurred and the text and images cannot be seen clearly.

Because the screen protector panel must fit the size of the laptop, if you replace the laptop in the future, you may need to repurchase the screen protector panel.

SUMMARY

There is a reflection problem, it needs to adapt to the size of the laptop’s monitor, and it needs to be purchased again when updating the laptop

Blue light filter glassesblue light filter for laptop

Blue light filter glasses reflect harmful blue light by coating on the surface of the lens, or use the principle of color bleeding, through the principle of optical complementary color, to infiltrate the blue complementary color yellow into the lens material and absorb the blue light by the pigment, thereby realizing the blocking of harmful blue light.

A good physical blue light filter should be based on reverting to natural light.

The blue light blocking rate cannot be too high or too low. Too low has no practical effect. Filtering blue light too much will lead to confusion in our circadian rhythm.

In addition, blocking too much blue light can also cause serious distortion and visual fatigue problems. The blue light blocking rate should be 60%~70%.

The downside of physical blue light filters is that they are expensive and are rarely made of durable materials, and you may end up having to replace them often.

After using the physical blue light filter, the color of the screen will be affected, especially the pictures.

However, the blue light filtering effect of the physical blue light filter cannot be adjusted. If you sometimes need to deal with some tasks that require high color fidelity, then you will find it very troublesome.

The use of software applications will not have such a problem, because it can adjust the blue light blocking rate.

SUMMARY
Expensive and easily damaged, Cannot adjust the blue light filter value


If you want to compare the blue filter application with a physical blue light filter (such as glasses), then you will find that a physical blue light filter will significantly reduce the image quality and color quality, and the effect of filtering blue light is not Regulated, far from being like a class of applications.


Blue light filter software for laptop

blue light filter

CareUEyes is one of the most popular blue light filter applications for laptops.

You can change the amount of blue light emitted from the screen by clicking or dragging the color temperature slider. Adjust the slider to the left to decrease the blue light, making the screen appear redder and darker. Adjust the slider to the right to increase the blue light, making the screen look bluer and brighter.

Like most blue light filter applications, CareUEyes can reduce blue light from the screen, relieve eye fatigue, prevent eye diseases, and use it at night to prevent blue light from disturbing sleep.

Users can now work comfortably for long periods of time without putting a lot of stress on the eyes and body.

Download

Unlike hardware screen filters, CareUEyes can work on multiple monitors, regardless of their size and configuration, and there is no need to purchase any hardware devices such as screen filters.

CareUEyes automatically adjusts the blue light blocking rate according to the time of sunrise and sunset. Compared to daytime, you need to reduce blue light exposure at night to promote sleep.blue light filter for laptop

Physical blue light filters cannot adjust the amount of blue light filtering at will.

CareUEyes provides eight preset modes, you can switch between pause, health, game, movie, office, editing, movie, reading, and customization at will.

Each of these options provides a slightly different experience for the user and changes the brightness of the display to suit a specific task or activity. If you are not satisfied with the preset mode, you can also modify the preset mode.

    • Health model

Health mode is suitable for people who are sensitive to light. This mode has the lowest color temperature among the eight preset modes, that is, the model with the strongest blue light filtering effect.

    • Game mode

Generally, people have higher requirements for the realism of the color of the game screen when playing games. Under the premise of not affecting the game experience, this mode makes subtle adjustments to the color temperature and screen brightness.

    • Movie mode

The display of videos and movies is usually most affected by the blue light filter. Fortunately, the movie mode setting on this blue light filter is very good. When watching movies on a laptop late at night, the color of the screen will not be seriously distorted, and there will be an unsightly orange glare.

    • Office mode

This mode is suitable for daily office use. Working in this mode, your eyes will not get tired easily.

    • Edit mode

This mode is very useful for programmers who need to work at night, because it inverts the color of the screen, which can remove a large area of white background, thereby greatly reducing blue light.

    • Reading mode

The reading mode makes all colors black and white like electronic ink devices, suitable for reading.

    • Custom mode

Users can customize a mode and freely change the color temperature and brightness.

SUMMARY
The price is cheap, the blue light filter value can be adjusted automatically, and it can be used on multiple laptops

 

Conclusion

There are many options for blue light filters for laptops, blue light filter screen protectors and blue light glasses have their own advantages and disadvantages, but blue light filter software (CareUEyes) is simpler and more practical. It can provide you with the greatest value at the lowest cost.

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CareUEyes Lite

CareUEyes Lite

  On April 15, 2019, we released the freeware CareUEyes Lite.

  CareUEyes Lite has the features of brightness adjustment, which has four brightness levels to choose from 20%-40%-60%-80%, all the operation interface is in the tray area.

  Unlike other brightness adjustment software, CareUEyes Lite does not use translucent windows to reduce brightness. It directly controls the gamma value of the display and is therefore not affected by the start menu and taskbar. It also does not affect the color of the mouse cursor and screenshots.

  In addition, click on the tray icon, you can easily restore or turn off the brightness adjustment features of CareUEyes Lite, very practical. 

        CareUEyes Lite’s performance is the best, it can work very well even on a poor performance machine, it only uses 600kb of disk space and 1m of memory and uses as little CPU time as possible.

  CareUEyes Lite is very useful for those who only need to adjust the brightness of the display.

Download Lite

CareUEyes Pro

        CareUEyes Pro is more powerful than CareUEyes Lite.

change brightness

Download Pro

 

     After installing the CareUEyes Pro, it will automatically increase or decrease the brightness of the computer screen to protect your eyes. The default setting reduces the brightness by 10%, and you can manually adjust it.

        Drag the progress bar to the left to decrease the brightness and the screen will darken, drag the progress bar to the right to increase the brightness and the screen will light up.

       The ambient light is different during the day or night. After the sunrise/sunset switch is turned on in CareUEyes, the brightness of the display will change with sunrise and sunset

        CareUEyes Pro has the features of the automatic blue light filter, automatic brightness adjustment, rest reminder, and keeping focus.

        CareUEyes has more customization options, these features protect your eyesight and increase productivity from all aspects.

        If you need to automatically adjust the color temperature and filter blue light, rest reminder, and other more advanced features, then CareUEyes Pro will be your best choice.

Timer

        You can buy  CareUEyes Pro from the Buy page. If you have any problems, please  contact us.

Download Pro

30 minute timer

30 minute timer

30-minute timer. Use this timer to easily time 30 minutes.

30-minute timer set the alarm 30 minutes from now. The countdown timer will remind you within 30 minutes.

By clicking the timer control, you can pause and resume the timer at any time. After the timer starts, the timer will start to blink.

Download

 

Set a ringtone to remind you when the timer expires

You can also set it to mandatory mode, when the timer ends, you have to take a few minutes of rest,

Set beautiful wallpapers to bring you a pleasant mood

Download

How to activate CareUEyes Pro – Fastspring

    1. First, you need to purchase a license at https://care-eyes.com/buy.html.
    2. After successful purchase, you will see the license code on the payment completion page, at the same time, the system will automatically send the license code to your mailbox, if you forget the license code, you can also retrieve it in the mail. payment-fastspring
    3. Open CareUEyes, switch to the Activate tab, then paste the license code into the edit box and click Activate to complete the activation.
    4. After successful registration, the Activate tab will automatically disappear.payment-fastspring-active
    5. Congratulations, you have become CareUEyes Pro edition of the user.

This is the activation demo

How to activate CareUEyes Pro

    1. First, you need to purchase a license at https://care-eyes.com/buy.html.

    2. After successful purchase, you will see the license code on the payment completion page, at the same time, the system will automatically send the license code to your PayPal account mailbox, if you forget the license code, you can also retrieve it in the mail.

    3. Open CareUEyes, switch to the Activate tab, then paste the license code into the edit box and click Activate to complete the activation.

    4. After successful registration, the Activate tab will automatically disappear.

    5. Congratulations, you have become CareUEyes Pro edition of the
      user.

This is the activation demo

how to use day night feature

 

The day and night feature allows you to set different color temperature and brightness for day and night, and automatically switches the setting for you at sunrise and sunset time.

How to enable day night feature?

  1. Turn on the switch of day night mode

2. Click the Config button to open the sunrise/sunset settings page

3. Set the sunrise/sunset time

There are two ways to set the sunrise/sunset time. Please choose the way you like. The first one is based on geographic location. The program needs to first obtain the address location of the current user, and then automatically calculate the sunrise/sunset time according to the geographic location.

The second is to customize the sunrise/sunset time, you can edit the sunrise/sunset time in the edit box, and then click the Confirm button to save the setting.

Day and night smotth transition allows you to specify how early or late the transitions start, relative to sunrise and sunset. It’s best to understand how it works by looking at some examples:

  • 0 Hours
    • Day-time transition starts at sunrise and ends precisely at sunrise
    • Night-time transition starts precisely at sunset and ends at sunset
  • 1 Hours
    • Day-time transition starts at sunrise and ends 1 hours after sunrise
    • Night-time transition starts 1 hours before sunset and ends at sunset
  • 2 Hours
    • Day-time transition starts at sunrise and ends 2 hours after sunrise
    • Night-time transition starts 2 hours before sunset and ends at sunset
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stay focus

    Now is the Internet age. Every day, there are instant messages, emails, and short messages that interfere with our work. When reading articles, we can’t be interfered with by other information. In order to improve reading efficiency, we need to force ourselves to stay focused and avoid other content dispersion. Our attention, but in addition to forcing ourselves to stay focused, is there a simpler way?
    CareUEyes’ Focus function can help you. It is a unique feature of CareUEyes Pro that prevents you from interfering with other window content to keep you focused.

focus setting

    You can pre-set the height of the focus area, the transparency of the focus area, and the color of the focus area. When you are reading, you can activate it by hotkey.

focus activated

    When the mouse moves, the focus window will also follow the mouse movement, so that the center point of your mouse is always Focus, and the focus function can be superimposed with the Editing Mode or Reading Mode of CareUEyes Pro, which allows you to enter a more focused state.