Recently, the topic "LED lights have permanent damage to the eyes" appeared on the hot search, triggering discussion among netizens.
According to media reports, French health authorities stated that LED lights will cause permanent damage to the retina and disrupt our natural sleep rhythm.
The French Agency for Food, Environment and Occupational Health and Safety (ANSES) warned that LED lights may cause irreversible damage to retinal cells and ultimately lead to blindness. ANSES urges officials to modify the maximum exposure limit of LED lights to reduce the amount of "blue light" in LED lights.
The "blue light" mentioned here does not seem to be friendly to our eye health. This is reminiscent of the dazzling array of anti-blue light products on the market, of which the most heard is the "artifact" that you and I have used when I was young-the eye protection lamp.
Open the webpages of major e-commerce companies and search for "eye-protection lamp" or even a simple word "lamp", and a large number of eye-protection lamp products will come into view. Do these so-called "eye protection lamps" really protect our eyes? Can a small desk lamp really keep us away from the "hazards" of blue light and protect our eyes?
Popular science: LED lights have permanent damage to the eyes?
Is "eye protection light" just a gimmick?
According to the latest national regulations on desk lamps, the so-called "eye-protection lamp" is actually just a "read-write operation lamp". The country does not have such a term as "eye-protection lamp", and the country only specifies a standard for "read-write operation lamp". However, there is no specific standard for eye protection. Therefore, whether the so-called "eye-protection desk lamps" sold on the market are really eye-protection cannot be guaranteed. According to the weekly quality report, less than 2% of the 170-odd desk lamps sampled are in full compliance with the standard! Not all products created due to the demand for "eye protection" can meet our needs for "eye protection" and quality.
Does the "no blue light" declared by the "eye protection lamp" really make sense?
First of all, we have to say that blue light generally refers to short-wave blue light, that is, light with a relatively high energy wavelength between 400nm-450nm.
Popular science: LED lights have permanent damage to the eyes?
Research by scientists has shown that blue light does affect the human body, but whether it will damage our retina and vision, there is no scientific conclusion yet. Although it is the only light that can penetrate the cornea, pupil, and lens into the macular area of the retina, only when the intensity of blue light is too high, it will produce too many free radicals in the macular area, which can lead to macular disease, myopia, and cataracts. And other hazards.
Popular science: LED lights have permanent damage to the eyes?
The main effect of blue light currently we are exposed to is that it affects the body's biological clock, which affects the secretion of melatonin at night, and then affects sleep. The most and strongest light source of short-wave blue light is the sun we touch every day, which is why we are energetic during the day and groggy at night.
At present, there is no reliable scientific basis to prove the impact on the eyes, because products such as desk lamps and mobile phones do have blue light radiation, so if you are looking at the screen more comfortable, it is necessary to prevent blue light.
Because when we are in a low light environment, our eyes will switch to different visual modes. For example, the pupils will be enlarged, and the amount of light will increase to 4-6 times the original amount; at the same time, the human eye will change from being sensitive to green to being sensitive to blue light, which means that our eyes are receiving a large amount of high-energy blue light, so we read the metropolis in the dark I feel the light is dazzling. Most people feel that looking at a warm and soft screen will make their eyes more comfortable.
"Eye protection" needn't stick to the standard of "blue light"
There is also "stroboscopic" that can cause visual fatigue to our eyes. Stroboscopic can be seen everywhere in our lives. Our daily electricity use is in the form of AC, with a frequency of 50 or 60Hz, which means that the "stroboscopic" of lamps and lanterns is inseparable from AC.
Popular science: LED lights have permanent damage to the eyes?
(The sensitivity of human eyes to strobe)
In addition, our mobile phones that use OLED screens also have strobes at low brightness. These strobes should be avoided for some visually sensitive people. When choosing a desk lamp or mobile phone, you should also pay attention to the data of stroboscopic, and pay attention to the effect of "anti-blue light" as well as the impact of stroboscopic.
Finally, don’t think that you can protect your eyes once and for all if you use an eye protection lamp or the screen does not have blue light and stroboscopic light. Ignoring the importance of reasonable eye use is the cause of myopia. It’s best to take a break every 30 minutes and look away or close your eyes to rest your mind. This is the key to eye protection.
