The basic rule of computer screen brightness is: the screen brightness is best adjusted to be similar to the brightness of the surrounding environment, not too bright or too dim. If the screen brightness is not suitable, it will cause eye fatigue and vision problems. However, the surrounding lighting conditions are constantly changing, and we need to adjust the screen brightness frequently.
On the Internet, there are many tutorials on the brightness adjustment of windows 7.
But they can’t help you solve the problem, because the brightness adjustment feature of windows 7 is not always displayed in the control panel, and sometimes even if we update the display driver, the brightness cannot be adjusted.
This is really annoying, but by using the third-party application CareUEyes, you can easily adjust the brightness on windows 7.
Adjust Screen Brightness On Windows 7 in a simple way
CareUEyes is an eye protection software that can easily help you adjust the brightness on windows 7. You can use the slider to adjust the brightness in the CareUEyes interface, and CareUEyes also supports setting custom settings hotkeys to adjust the brightness.
If the brightness of Windows 7 cannot be adjusted, not only will it hurt your eyes, but it will also affect your sleep.
Light is one of the most important external factors that can affect sleep. It does so both directly, by making it difficult for people to fall asleep, and indirectly, by influencing the timing of our internal clock and thereby affecting our preferred time to sleep..(External Factors that Influence Sleep)
On most laptop keyboards, you will find shortcut keys that can quickly increase and decrease brightness. Usually, these keys are function keys (from F1 to F12) and are usually located at the top of the keyboard. If you want to adjust the screen brightness, look for the brightness symbol (usually a logo).
Since the F keys are function keys, you must hold down the Fn key on the keyboard (usually located near the lower-left corner of the keyboard) when you press them to work.
Adjusting the screen brightness to suitable is very important for the eyes. The screen dimmer helps control the brightness of your computer screen, reduce eye strain, prevent eye diseases, and improve sleep.
Three ways to dim screen light
Use the brightness adjustment button of the monitor, display, or screen
Use the built-in brightness adjustment of windows (System->Display)
Use the laptop keyboard shortcut Fn+F11 or Fn+ F12
😒But the above three methods of dimming the screen light are cumbersome and usually useless. People have to find other solutions.
Third-party screen brightness dimmer software
First, CareUEyes may be the best screen brightness dimmer software (Supports Windows 10, Windows 7, and Windows XP ). It supports multiple screens and can dim all your screens, E.g. laptop, a desktop PC with an external display, or even connecting an external display to a laptop.
CareUEyes is neat software, which has a simple user interface and practical features.
At night or when we are in a dark environment, even if the brightness of the monitor has been adjusted to the lowest level, it is still too bright and too dazzling.
Use CareUEyes to dim the screen easily (screen darkener), just select the built-in working mode or drag the brightness progress bar.
You can easily reduce the brightness of the display below the factory setting, this feature is very useful and can greatly reduce eye fatigue.
It supports multiple displays, you can control the brightness of each display individually, or you can dim them at the same time.
If you like the screen to be brighter during the day and darker at night, you can turn on the sunset/sunrise mode, it will automatically adjust the brightness of the display according to the sunrise/sunset time.
Support hotkey to adjust screen brightness
CareUEyes supports hotkeys to quickly adjust the screen brightness, you only need to customize the hotkeys in the settings, you can use the hotkeys to brighten or dim the screen.
More eye protection solutions for CareUEyes
In addition to dimming the screen, there are more ways to protect our eyes, such as blue light filtering and regular breaks:
Blue light filter
The display is too bright will affect the eyesight, the blue light emitted by the display can also cause damage to the eyes
Blue light has the characteristics of high energy and short wavelength.
Turning on the blue light filter feature can reduce the damage of blue light to the eyes
Take regular breaks
Working in front of a computer for a long time can easily cause eye fatigue, dry eyes, and other symptoms.
It’s more beneficial for us to take a few minutes to break every once in a while, exercise our body, and see the distant scenery.
Since 2017, millions of users have benefited from CareUEyes, because it is not only a screen dimmer but also an eye protection assistant. It can always protect your health.
I am also a beneficiary of it😊. Because sometimes my work has to be done at night.
A monitor that is too bright can make my eyes sting and make it difficult to fall asleep at night. I can have a good sleep after using it.
Every feature update of CareUEyes will bring users a better experience and more interesting features. You can check its changes log here.
Because many users rely on it, we are more motivated to improve it. You can check their reviews here.
The rapid development of the information age has made people more and more dependent on electronic equipment. We need to use computers to work, study, process emails, watch videos, and we cannot do without computers. Have you ever calculated how long you are staring at the screen every day? Investigations show that some people face electronic screens for more than 9 hours a day.
As we rely more and more on electronic screens, our eyes are unknowingly hurt. Do you feel your eyes are dry and astringent, and you can’t help but want to rub them with your hands? Or, occasionally feel a little blurred vision? Sometimes you even feel a headache.
In fact, this is a symptom of “Computer Vision Syndrome”. Other consequences include neurological symptoms such as chronic headaches and musculoskeletal problems such as neck and back pain. If you have not taken effective measures to protect your eyes, your work efficiency may be affected when the eye symptoms become severe.
Eye health is important to everyone. We should take measures to protect our eyes from computer screens, instead of waiting for eye diseases to be treated.
Here are 6 ways to protect eyes from computer screen.
1. Reduce blue light
We can see the picture displayed on the computer screen because the computer screen emits light. But the light emitted by the computer screen is more dazzling than natural light, and it also contains a lot of blue light that is harmful to the retina.
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, causing the atrophy or even death of retinal pigment epithelial cells. The death of light-sensitive cells will result in decreased vision or even complete loss of vision. This damage is irreversible.
Blue light can also cause macular degeneration. The lens of the human eye will absorb part of the blue light and gradually become cloudy to form cataracts, and most of the blue light will penetrate the lens, especially children’s lenses are clearer and cannot effectively resist the blue light, which is more likely to cause macular degeneration and cataracts.
Due to the short wavelength of blue light, the focus point does not fall on the center of the retina, but a little bit forward from the retina. To see clearly, the eyeballs will be in a state of tension for a long time, causing visual fatigue.
You may experience symptoms such as eye fatigue, headache, blurred vision, dry eyes, neck and shoulder pain.
It is a good way to use blue light filter software to reduce blue light and protect eyes from computer screen.
CareUEyes is one of the best blue light filter software. It filters blue light by adjusting the color temperature and supports free adjustment of the blue light filter intensity.
According to the most commonly used scenes in people’s daily life, eight preset modes are designed and the most suitable color temperature and brightness are configured for each mode. They are health, games, movies, office, editing, reading, customization, and pause modes.
2. Keep a proper distance from the computer screen
We should keep a proper distance from the computer screen when using the computer. If the distance is too far, you will not be able to read the screen correctly. If it is too close, your eyes will tire easily.
What is the ideal distance from the screen? A simple rule is to keep the screen at least one arm away from your arm and pay attention to adjusting the height of the desk and chair so that the line of sight is about 6-8 inches above the center of the screen. In addition, when looking straight ahead, your eyes should be flush with the top of the display.
This keeps our eye muscles in the most comfortable and relaxed state.
3. Don’t forget to blink
Under normal circumstances, the average person blinks 10 to 20 times per minute. Don’t look at it as a small gesture, the effect of blinking one’s eyes cannot be underestimated.
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.
Don’t forget to blink your eyes after you concentrate on your work for a while. This will help keep your eyes moist and protect your eyes from computer screeen.
4. take regular breaks
It is recommended to follow the famous “20-20-20” principle. This principle is to raise your eyes and look 20 feet away for at least 20 seconds every time you look at the screen for 20 minutes.
Stay away from the computer and focus on distant things, such as trees outside windows or office corridors. Close your eyes gently, then squeeze and hold for a while, then open and relax them.
You can also do eye exercises during rest time, which can help relieve eye fatigue and make your eyes feel better.
However, many people often forget to take regular breaks due to their busy schedules. CareUEyes can remind you to take breaks regularly. It is not a simple timer, it is far more intelligent than you think.
CareUEyes can intelligently analyze the time you use the computer, and when you actually work on the computer for the predetermined time, it will remind you to take a break.
For example, if you set a 20-minute break, but you temporarily leave the computer 5 minutes after you start to work due to other things, CareUEyes will pause the timer after you stop using the computer, and then resume the timer when you return to the computer to start working. If you have been away for a long time and have not returned to work, CareUEyes will restart the timer after you return to work.
Adjust the brightness and contrast on the computer screen. Don’t make your screen too bright, because the brighter the screen, the more blue light will be emitted, and too bright screen light is also a direct stimulus to the eyes, which can easily lead to eye fatigue.
For many computer screens, especially desktop screens, it is not easy to adjust the screen brightness. It may be difficult for you to find the entrance to adjust the brightness, but using CareUEyes can easily adjust the brightness of the screen. You can either use the progress bar on the program interface to make adjustments or use the hotkeys to make adjustments.
If you often read pure text on the screen, you can try to set the screen to a black and white electronic ink style. At night, you can also reverse the color of the screen and turn a large area of white background into black. The eyes are more comfortable.
CareUEyes’ reading mode and editing mode can help you achieve these two features.
6. Reduce glare
Change the bulbs to soft/warm varieties to create a comfortable lighting environment. Try to avoid placing the monitor under the lamps, because bright lights are most likely to cause glare. If you are really sitting directly under the light fixture, please dim the light. Turn off any lights behind the display, such as desk lamps.
Do not let your monitor face the window, because the bright light outside the window can easily cause glare. The ideal display position is 90 degrees to the window. But if you cannot adjust your position, please close the blinds or draw the curtains during the day to reduce glare.
Pay more attention to the prevention of eye diseases rather than treatment
Overall, you need to protect your eyes from many aspects. The eyes are very important organs for us to obtain information from the outside world. Everyone should take good care of their eyes and focus on preventing eye diseases rather than treating eye diseases. Download CareUEyes and protecting your eyes from now on. There is nothing easier than downloading and installing software.
Computers have penetrated into every aspect of our lives. Whether in the workplace, at home, or at school, the use of computers is now almost mandatory, and to a certain extent, for many of us, watching the screen is almost inevitable.
Now apparent that prolonged use can lead to a series of computer vision-related problems, collectively known as computer vision syndrome (CVS) or digital eye fatigue, in fact, just a day spent on the computer for more than two hours, you will have 90% the chance of developing computer vision syndrome (CVS), most of us have experienced at least some of the symptoms of CVS. These symptoms include eyestrain, headaches, dry eyes, blurred vision, neck pain, computer vision syndrome is due to prolonged staring at the screen (computer, iPad, mobile phone, etc.) occur, these are some of the more common symptoms.
In addition to causing CVS, the computer is a notorious blue light emitter, Blu-ray also involves many other health problems. The excessive blue light on the screen can cause eye damage and may play a role in the development of age-related macular degeneration (AMD). It also suppresses sleep and can cause insomnia and disturb your circadian rhythm. If we use a mobile phone or computer before going to bed, it is more likely to cause insomnia.
Therefore, protecting your eyes is vital whenever you use a computer, and you can take some steps to prevent the symptoms from getting too bad. There are 6 ways to protect your eyes from the screen, even if you have to stare at them all day long.
Anti glare computer screen protector for eyes
The glare of reflection on the computer screen is the main cause of eye strain, and the reflection on the computer screen will constantly distract your attention, forcing you to make extra efforts to concentrate. This ultimately leads to eye strain, and you can use a high-end anti-glare computer screen to reduce the glare of your computer monitor. The anti-glare filter is available in two frame designs – flat or wrap. The frame you choose depends on your display style and personal preference, and with either of them, you can virtually eliminate all UV rays that are reflected from the screen to your eyes. There is another option – install eye protection software CareUEyes , which filters the glare of the display, is very convenient to use, and is cheaper than the anti-glare screen protector.
Blue light filter computer screen protector for eyes
The screen protector can also be used to filter out the blue light emitted by the computer, which has a shorter wavelength than the other components of the visible spectrum and contains more energy. Excessive blue light can cause eye damage and can cause insomnia and disturb your circadian rhythm. You can filter blue light by installing a Blu-ray filter screen protector for your computer, but the Blu-ray filter screen can cause the display to be distorted, you may need time Adapting to this change, too much color distortion can exacerbate eye fatigue, and the eye care software CareUEyes can also filter blue light, CareUEyes is more powerful than the blue light filter screen and is more convenient to use.
Follow the “20-20-20” rule
20-20-20 rule: Every 20 minutes, look at something 20 feet away for 20 seconds. The 20/20/20 rule was popularized by Dr. Jeff Anshell, a specialist in “vision ergonomics.”, sometimes we forget With this rule, we can install the eye care software CareUEyes , which will remind us to rest every 20 minutes.
Adjust screen settings
Downgrade the screen brightness, you want the brightness of the display to match the brightness of the surrounding work area, and if it looks like the light source in the room, it’s too bright. If it looks dull, it may be too dark, and the eye care software CareUEyes can easily adjust the brightness to the appropriate value.
Don’t forget to blink
Blinking helps to lubricate the eyes, otherwise, it can cause dry eyes. When you stare at the screen for a long time, you will forget the blink of an eye, so we must consciously force ourselves to blink, which is helpful for the health of the eyes. Combined with the 20-20-20 rule.
When we are busy, we will forget to go to the bathroom, forget to drink water, forget to blink, forget to rest, but for the health of our eyes, we must rest regularly. If you can’t do this, then you have to use software to force yourself to rest. CareUEyes has a forced rest feature that reminds you to rest every 20 minutes.
CareUEyes is an eye protection software that runs on windows. It has anti glare, blue light filtering, and timed reminder features. It is very convenient to use and is used by many companies and governments.
Conclusion to computer screen protectors for eyes
We can reduce eye fatigue through physical devices, or relieve eye fatigue through habitual changes, but the most convenient way is to use eye care software CareUEyes , because it is more convenient, cheaper, and more effective, hope our article is helpful for you.
1. CareUEyes has more preset “effects” than Night light
Compared to Win10’s nightlight, CareUEyes offers a richer set of options. For example, CareUEYes offers many pre-set options, such as Office, Game, Movie, which will definitely help you find your favorite effect in the shortest amount of time.
Editing mode will invert the color, black to white, white to black, use the editing mode to read the text at night, which can greatly reduce blue light and reduce eyesight Stimulus. Win10’s night light does not have this feature.
Reading mode makes your screen look like E Ink screens, which is very suitable for reading text for a long time.
2. Independently adjust brightness and color temperature
CareUEyes allows you to adjust brightness and color temperature independently and even has shortcuts specifically designed for it. That is also not available in Win10 nightlight.
3. Customize rules
If you sometimes need to process photos, but turning on the night light feature will make the color of the photo distorted. Imagine that you need to turn the night light on and off frequently. It will be a very troublesome period. But using CareUEyes will not have such troubles. You can customize the rules and automatically pause the color temperature adjustment when using photo processing software. You can also customize other rules, such as
automatically entering a default mode when using certain software.
4. Focus mode
Focus mode helps you to read with greater concentration.
5. Break timer
Staring at a computer screen for a long time can cause computer vision syndrome, including eye fatigue and discomfort, dry eyes, red eyes, blurred vision, headache, neck and shoulder pain, and so on.
Because humans usually blink about 15 times per minute. But when we stare at the computer or mobile phone screen, the number of blinks will be greatly reduced, which may lead to dry eyes and fatigue.
Sitting in the same position for a long time can cause tension and pain. Our back, neck, shoulders, and arms will feel the tension.
Taking a break every once in a while to look at distant objects can greatly reduce the symptoms of eye fatigue. The most well-known is the 20-20-20 rule, which means looking at a place 20 feet (6 m) away from you every 20 minutes for 20 seconds.
But if there are no extra reminders, most people will be immersed in work and forget to take regular breaks. CareUEyes will remind you to take breaks regularly. During these rest periods, you can stand up, walk around and stretch your body to reduce fatigue in your eyes, shoulders, neck, and arms.
Overall, Night light can just only adjust the color temperature, but CareUEyes can not only adjust the color temperature, but also has more eye protection features than Night light, and the user experience is more user-friendly than Night light.
You can use a premium anti glare computer screen to reduce the glare of your computer monitor. The anti-glare filter is available in two frame designs – flat or wrap, and which frame you choose depends on your display style and personal preference, and with either, you can virtually eliminate all UV rays that are reflected from the screen into your eyes. Anti glare computer screen helps reduce eye strain.
Look for an anti glare computer screen with the following features:
High quality optical glass is superior to plastic.
A good glass filter has a multi-layer anti-reflective coating on one or both sides of the glass looking for a filter that provides up to 95% or 99% glare reduction.
There are a variety of light transmissions in the anti glare computer screen, from about 30% transmission to 65% or higher.
The intensity of ambient light in the work area helps determine the level of transmission that works best for you – the greater the glare, the lower the transmission you may need to reduce glare on the display.
Removing excess static electricity from the computer screen is important to help minimize dust accumulation on your computer screen, which can reduce the legibility of characters and look for anti glare computer screen with anti-static features.
Easy to clean the coating.
Anti-reflective coatings show fingerprints and can be difficult to remove. Look for an anti glare computer screen with easy-to-clean feature, just clean the filter with water and a soft cloth.
ISO 9241-7 compliance.
This will ensure that the filter you purchased has passed the highest standard glare reduction test.
Disadvantages of anti glare computer screen:
Can’t filter blue light
Can’t adjust display brightness
Can’t change your viewing habits
Different production standards may cause eye fatigue
Will distract users
Screen protectors can be used as anti-glare devices, but they can’t change your viewing habits. In addition to using a computer screen, there are more ways to eliminate eye strain. We can use computer software to help us reduce eye strain.
Anti glare computer screen software
For example, CareUEyes is an eye protection software that filters 90% of the blue light and glare by adjusting the color temperature and brightness of the display, it also has a timed reminder rest function, try to use the timer to ensure that every 45 minutes away from the screen, get up and walk around Try to focus your eyes further, and its price is much lower than the anti-glare filter device, which may be the best choice.
Are you looking for a blue light filter Windows 7?
Then you have come to the right place. Next, I will show you how to reduce blue light on windows 7 in a simpler way.
Blue light filter for windows 7
CareUEyes is a Windows 7 blue light filter, which helps prevent eye fatigue, relieve eye pain and vision problems. It filters blue light by adjusting the color temperature, so you can freely control the filter intensity of blue light. The lower the color temperature, the less blue light.
CareUEyes is similar to the Night light on windows 10. You can use it as windows 7 Night light, but it is definitely better than the Night light.
CareUEyes can easily help you achieve intelligent blue light filter adjustment. Some software uses overlay translucent windows to filter blue light, but CareUEyes directly controls the display’s RGB value, which ensures compatibility with other software. You can also set the CareUEyes blue light filter adjustment feature to be disabled when a special program is running (for example, while running photoshop, to restore real color).
Unlike other blue light filter software on windows 7, CareUEyes has higher performance. It only needs 5M of memory at runtime, and it does not consume too much CPU time. And the package of CareUEyes is only 2M. I believe this is your best choice.
Although blue light is harmful to the eyes, proper blue light irradiation is beneficial to people during the day. Blue light can keep people awake and have the energy to finish work or study. Therefore, if you are not a person with extremely sensitive eyes, you only need to filter a small part of the blue light during the day and restore the light of the computer screen to light similar to sunlight.
But at night, blue light becomes very harmful, you need to filter more blue light to prevent sleep from being disturbed by blue light. Excessive exposure to blue light at night will cause sleep problems. Because blue light inhibits the production of melatonin in the body. Melatonin is a hormone produced by the pineal gland. It helps your body know when to sleep and wake up. (External Factors that Influence Sleep)
According to people’s different needs for blue light day and night, CareUEyes provides sunrise and sunset feature. 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 functions, CareUEyes will automatically help you adjust the color temperature and brightness at sunrise and sunset.
In addition to filtering blue light, more ways to protect your eyes
1. Follow the “20-20-20” principle
Every time you watch the screen for 20 minutes, raise your eyes and look at a place 20 feet away for at least 20 seconds.
However, many people often forget to take a break due to their busy schedules. CareUEyes can remind you to take a break regularly. It is not a simple timer, it is far more intelligent than you think.
CareUEyes can intelligently analyze the time you actually use the computer, and when you actually work on the computer for the predetermined time, it will remind you to take a break.
2. Adjust the brightness of the screen
Don’t make your screen too bright, because the brighter the screen, the more blue light will be emitted, and too bright screen light is also a direct stimulus to the eyes and easily leads to eye fatigue.
Use CareUEyes to easily adjust the screen brightness. You can adjust the brightness in the program interface or use the hotkeys to adjust.
Do you need to use the computer for a long time every day? Do you feel eye strain and eye pain?
In fact, the damage to the eyes of the computer screen mainly comes from the blue light emitted by the screen.
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.
The effects of blue light on health
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.
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
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 starts to rise. This indicates that the body is ready to fall asleep. When the sun rises, the level of melatonin secretion starts to decrease. , 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 filter blue light?
All computers emit blue light. For those who work long hours in front of the computer, the blue light filter for pc is an essential software to better protect the eyes, health, and productivity.
CareUEyes is a blue light filter for pc that controls the color temperature of the display to adjust the amount of blue light emitted, which can reduce our eye strain. You can freely adjust the blue emission of your monitor according to your usage habits, such as game mode, reading mode, editing mode, etc.
The blue light filter for pc sets different color temperatures in the evening and during the day. In the twilight and early morning, the color temperature will smoothly transition from night to daytime, so that your eyes can adapt slowly. At night, the color temperature should be set to match the light in your room, and during the day, the color temperature should match the external light.
In addition to the blue light filter, CareUEyes also has the screen dimming feature. If the display is too bright or too dim, it will cause eye fatigue and visual damage. CareUEyes eliminates the visible flicker of the display backlight, which is the cause of eye fatigue and headache.
Using software to filter blue light is probably the cheapest and most efficient way. You no longer need to buy blue light glasses and blue light filter film to filter blue light. They are not only consumables but also lack flexibility.
I believe the blue light filter for pc is your best choice.
The yellow screen can effectively reduce the blue light emitted by the screen, relieve eye fatigue, and even help you fall asleep better at night.
If you haven’t heard the dangers of blue light, you may not like a yellow screen.
What is Blue light?
Blue light is light with relatively high energy with a wavelength between 400nm and 480nm. It has a shorter wavelength and is part of the visible spectrum.
Why is blue light bad?
Blue light can penetrate the lens directly to our retina, causing the atrophy or even death of retinal pigment epithelial cells. The death of light-sensitive cells will result in decreased vision or even complete loss of vision. This damage is irreversible.
Blue light can also cause age-related macular degeneration, which can lead to permanent vision loss.
The lens of the human eye will absorb part of the blue light and gradually become cloudy to form cataracts, and most of the blue light will penetrate the lens, especially children’s lenses are clearer and cannot effectively resist the blue light, which is more likely to cause macular degeneration and cataracts.
Due to the short wavelength of blue light, the focus point does not fall on the center of the retina, but a little bit forward from the retina. To see clearly, the eyeballs will be in a state of tension for a long time, causing visual fatigue. You may experience symptoms such as eye fatigue, headache, blurred vision, dry eyes, neck and shoulder pain.
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 starts to rise. This indicates that the body is ready to fall asleep. When the sun rises, the level of melatonin secretion starts 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.
Why can the yellow screen reduce the blue light emitted by the screen?
You need to know the concept of color temperature first. The concept of color temperature is based on an imaginary absolute black body, which emits different colors of light when heated to different temperatures, and its objects appear in different colors. Just like when an iron block is heated, the iron block first turns red, then yellow, and finally white. When heated to a certain temperature, the spectral component of the light emitted by the black body is called the color temperature at this temperature, and the unit of measurement is “K” (Kelvin).
If the light emitted by a light source has the same spectral components as the light emitted by a black body at a certain temperature, it is called a certain K color temperature.
For example, some common light sources and related parameters of color temperature: tungsten lamp 2700K; summer noon sun 5500K; cloudy 6500-7500K; candlelight 2000K and so on.
The color temperature calibrated by this method is exactly the opposite of what the general public thinks of “warm” and “cold”. For example, people usually feel red. Orange and yellow are warmer, white and blue are colder, but in fact, red has the lowest color temperature, and then gradually increases are orange, yellow, white, and blue, and blue is the highest color temperature.
The color temperature of the screen only indicates the spectral components of the light source, not the luminous intensity (the brightness of the screen indicates the luminous intensity of the screen). A high color temperature indicates more short-wave components and a bluish-green color; a low color temperature indicates more long-wave components and a reddish-yellow color.
Therefore, if we want to reduce the total amount of blue light emitted by the screen, one way is to reduce the blue light component in the spectrum, that is, lower the color temperature and adjust the screen to a yellowish tint. Another method is to reduce the luminous intensity of the screen, that is, to dim the brightness of the screen.
Are the color temperature and brightness as low as possible?
Although reducing the color temperature and brightness of the screen can help us reduce the harmful blue light, the color temperature and brightness of the screen are not as low as possible. Because the color temperature is too low, the screen will turn red, which will make the screen difficult to see. Too low screen brightness will also make the screen difficult to see, increasing eye fatigue. We need to keep the color temperature and brightness of the screen within an appropriate range.
What are the appropriate color temperature and brightness?
CareUEyes also has the function of adjusting the color temperature and adjusting the screen brightness. It has designed eight preset modes according to the most commonly used scenes in people’s daily life and configured the most appropriate color temperature and brightness for each mode, which are health, games, movies, office, editing, reading, customization, and pause modes. This allows you to quickly find the color temperature and brightness that suit you.
The healthy mode has the lowest color temperature among all modes, and the screen looks slightly yellow. Your eyes may not adapt well at first, but soon you will find that such a screen looks softer, your eyes will no longer be tingling, dry, and tired.
Although blue light is harmful to the eyes, proper blue light irradiation is beneficial to people during the day. Blue light can keep people awake and have the energy to finish work or study. Therefore, if you are not a person with extremely sensitive eyes, you only need to filter 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 filter 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.