What is Blu-ray? Blue light is the highest energy light in the visible light spectrum, defined as light with a wavelength of 400 to 500 nanometers.

Blue light most often appears on the screen light of 3C products. Because blue light can reach the macula of the eye, long-term exposure to blue light can cause eye disease. The anti-blue light glasses we hear most often are not necessarily useful, and the effectiveness of protection varies from person to person. In this article, MindDuo will show you the damage caused by blue light, whether the blue light glasses on the market can really help us prevent blue light, and sort out the 10 most commonly used methods to prevent blue light damage and recommend to everyone.

Blu-ray
What is Blu-ray?
“Blue light” is visible light with a wavelength ranging from 400 to 500 nanometers. It is the highest energy light in the visible spectrum. It fills all corners of the world. Before 3C products came out, the sun was the only source of blue light. Nowadays, TVs, mobile phones, computers, game equipment and other products that can emit artificial blue light also make blue light indoors day and night.

Blue light is more likely to flicker than other colors of light, and the strong light projected by the flicker will reduce the visual contrast and affect the clarity and sharpness of the picture. If you use 3C products all day, blue light will cause your eyes to fatigue, mental and physical fatigue and headaches.

In addition, “Harvard Health Publishing”  pointed out that exposure to blue light can inhibit the secretion of melatonin, making people prone to insomnia, even dim light will have an impact. Stephen Lockley, a sleep researcher at Harvard University, pointed out that at least 8 lux (lux) of light can affect the circadian rhythm of the human body, and 8 lux is about twice as bright as a night light.

But blue light is not only bad. Blue light during the day can help the human body to control the circadian rhythm, and it can also enhance human alertness, mood, and overall well-being.

The position of blue light in the spectrum is about 400-500 nanometers
What methods can prevent blue light? 10 tips to prevent blue light damage

The built-in blue light filter in 3C products: In addition to anti-blue light glasses, people who do not have high myopia, macular degeneration, or have budget considerations recommend using the built-in blue light filter in computers and mobile phones, or purchase a blue light filter application. Program . Studies have pointed out that using the computer’s blue light filter or night view function can reduce blue light projection by up to about 87%, and users can also adjust the detailed settings by themselves to choose between color integrity and blue light filter.
Anti-blue light protective film: If you want to increase the protection of some entities, some people will buy anti-blue light protective film for mobile phones and computers. The anti-blue light protective film uses a special coating, which can usually filter light with a wavelength of 380 to 500 nanometers.

The American blue-light screen protection tool company “Ocushield” pointed out that no matter what kind of blue-light filter tool, it is most effective to block about 30 to 60% of blue light. Blue light also has some benefits and should not be completely filtered.

Blue light-filtering intraocular lens: Intraocular lens  implanted in the human eye has gradually emerged in recent years. As long as the blue-light filtering function is implanted in the human eye, it can be effective It protects human eyes from blue light damage, but blue-light filtering intraocular lenses are currently only used on cataract patients after surgery.

20-20-20 rule: People can also develop good daily habits to fight against blue light damage, such as observing every 20 minutes of electronic products, rest for 20 minutes, and look 20 feet (about 6.1 meters) away from themselves The 20-20-20 code.

Regularly watching objects at different distances: helps the human eye to take a break from the close-up picture.
3C product screen adjustment: When watching the 3C product screen, you can increase the frequency of blinking, change the product tablecloth from bright to soft warm tones, and keep the screen clean. A clean screen can reduce the glare of the screen.

Avoid using 3C products in the dark: the pupils of human eyes will enlarge in the dark, which will cause more blue light to enter the eyes and cause damage to the eyes.

Adequate sleep: Adequate sleep will also affect the ability of the eyes to eliminate fatigue. In the sleep state, because the muscles are fully relaxed, the eyes can get the most appropriate rest.

Avoid light during sleep: For the effect of blue light on sleep, you can avoid watching the screen two hours before going to bed, and change the night light in the room to red light that is unlikely to affect melatonin secretion.
Get more sun and enjoy nature: You can also expose yourself to the sun as much as possible during the day. This will help you sleep at night and your mood and alertness during the day.

Choose a suitable desk lamp: Whether for work or reading, because you need to use your eyes for a long time to stare at the computer or tablet, in order to protect your eyesight, it is recommended to choose a desk lamp that conforms to your daily habits, read with appropriate light or use 3C products, It will not make the eyes sick, but how to choose a suitable lamp? You can refer to the method of choosing a lamp.

What harm does blue light cause? Does it affect children?
“Harvard Health Press” pointed out that blue-wavelength light is beneficial to the human body during the day, and can boost people’s concentration, reaction time and mood. However, long-term exposure to blue light may cause macular degeneration, severe or even blindness. Studies have also shown that exposure to artificial blue light at night is associated with diabetes, heart disease, and obesity.

And because blue light affects the secretion of melatonin and interferes with our sleep, it is the main cause of insomnia in many modern people. Researchers also believe that too short sleep may increase the risk of depression, diabetes, and cardiovascular disease.

Patients with high myopia and macular degeneration must pay special attention to the damage caused by blue light. In addition, research by the National Institute of Ophthalmology of the United States shows that children’s eyes absorb more blue light from the screen than adults. There is already a lot of evidence that increasing the use of electronic products may damage children’s vision and cause children’s vision. Sleep problems such as blur, eye pain, tired eyes, and insomnia.

Short-wave blue light can affect the macula of the eye and cause lesions