LED lights can induce blindness! These people should be especially careful about blue light hazards
The bright moon is in the sky, the stars gather in the romantic flower sea, and the dazzling night scene is a visual feast that lights bring to people.
Street lamps light up the night and illuminate our way home.
However, a recent Weibo hot search broke this calm, showing that the French Health Bureau reported that LED lights can cause permanent damage to the retina, and severe cases can lead to blindness! This has attracted great attention from netizens.
LED lights can induce blindness! These people should be especially careful about blue light hazards
Check out reports from the French authorities, which mainly emphasize the damage to the retina caused by the blue light emitted by LED lights, leading to decreased vision, increased age-related macular degeneration, and even induced blindness.
LED lights can induce blindness! These people should be especially careful about blue light hazards
Image source: Screenshot of the official website of the French National Agency for Food, Environment and Labor Hygiene
So what is Blu-ray? What are the consequences of blue light hazard? Do LED lights still work? How can we avoid blue light hazards? Let's have a good chat today.
What is blue light hazard? What are the consequences?
Blue light is high-energy short-wave light with a wavelength between 400nm and 500nm, which has the strongest penetrating power and the highest retinal sensitivity in visible light.
The principle of white light emitted by energy-saving LED lamps is different from that of incandescent lamps. It emits blue light first, then excites the phosphor, emits yellow light, and mixes it into white light, which has more blue light components in its spectrum.
LED lights can induce blindness! These people should be especially careful about blue light hazards
Image source: "Blue Light and Eye Health" | China Optical Science and Technology Magazine
Excessive blue light radiation can cause oxidative stress in retinal cells, causing irreversible photochemical damage and aggravating macular cell damage. This is what we usually call "blue light hazard".
Blue light hazards can cause the following consequences:
01. Cause blurred vision and cause visual fatigue
02. Aggravate retinal macular disease
Excessive blue light can cause retinal epithelial pigment cells to die, causing cell death in the light-sensitive area, macular degeneration, fundus lesions, vision loss, and even blindness.
LED lights can induce blindness! These people should be especially careful about blue light hazards
Image source: "Blue Light and Eye Health" | China Optical Science and Technology Magazine
03. Disrupting the human circadian rhythm
Blue light stimulates the brain, inhibits the secretion of melatonin and increases the production of adrenal cortex hormones, thereby regulating heart rate, alertness, sleep, body temperature, gene expression, etc., disrupting the human circadian rhythm and increasing the risk of disease, especially breast cancer and colorectal cancer. increase.
The blue light hazard affects a large number of people. The World Health Organization (WHO) Eye Care Association announced that more than 30,000 people worldwide are blinded by blue light and radiation every year.
According to data from the Ophthalmology Branch of the Chinese Medical Association, among the 420 million netizens in China, 63.5% of them suffer from different degrees of eye diseases such as vision loss, cataracts, and blindness due to blue light and radiation.
Worryingly, children are more vulnerable to this disturbance.
From this point of view, the blue light emitted by LED lights can cause damage or even permanent damage to the eyes, which is not alarmist.
Do LED lights still work?
Blue light can cause all kinds of serious consequences, but it is equally unreliable to "put aside the dose and talk about toxicity". The study also pointed out that the strong lights used in flashlights, car headlights and some devices may damage our eyes, but the LED mobile phone, tablet and laptop screens used in ordinary times are basically harmless to the eyes.
According to the current international and domestic standards, blue light retinal hazards can be classified into four types: non-hazardous (category zero), low risk (category one), medium risk (category two), and high risk (category three).
Currently used as LED lighting, there are basically zero and one hazards, and if it is a second type of hazard, there is a mandatory label (eyes can't stare).
The blue light hazard risk of LED lights that have passed the national quality inspection is similar to that of other light sources, and they are all within the safety threshold. Therefore, these light sources and lamps used in daily life are used in normal ways and are harmless to human eyes, and we do not need to worry too much.
Who needs to be alert to blue light hazards?
01. Diabetics. Most diabetic patients have retinopathy, the threshold of the retina to withstand light damage is greatly reduced, and blue light has a greater impact on their vision.
02. Infants and adolescents. The eyes of infants and young children are not fully developed, and blue light is more likely to act on the retina. In addition, infants and young children can often look directly at LED lights when they lie on their backs in bed, and cannot filter blue light, so they are greatly affected.
03. Those who drive more at night, those who have a history of eye surgery, and those who are heavy users of electronic products (the time spent looking directly at the LED light source is more than 10 hours a day).
How to avoid blue light hazards?
01. Blue light protection
For the daily life of ordinary people, using LED lights that have passed the national quality inspection and listing, there is no need to worry about the risk of excessive blue light damage to the retina. Blue light protection should be mainly used in environments with high-brightness light sources and avoid looking directly at high-brightness light sources.
In addition, for people who often face electronic products, blue light will aggravate visual fatigue, and some anti-blue light products can also be considered.
However, it should be noted that blue light is not the only wavelength that can reach the fundus and cause the retina. Unreasonable filtering of blue light may affect human dark vision, circadian rhythm and color vision balance.
02. Correct use of lighting
Consider using "warm white" LED lights for home lighting, and pay attention to how to use it:
One is to lower the lampshade to ensure suitable lighting for books or desktops, and at the same time block the light source to avoid glare;
Second, when turning on the desk lamp, it is best to turn on other lights, so that the indoor light is relatively coordinated, avoid glare, and protect the eyes. Infants and diabetics should use zero-hazard LED lighting products.
03. Develop good eye habits
Avoid using electronic products for a long time, rest for 20~30 seconds every 20~30 minutes, and look at the distance regularly;
If you have dry eye symptoms while reading electronic screens, remember to blink 10 to 12 times per minute;
Minimize the use of LED screens before bedtime;
It is best to wear sunglasses when outdoors;
Do not look directly into bright light.
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