According to recent reports from the British media, a new study from Spain shows that LED energy-saving lamps may cause damage to people's vision. Research experts believe that lamps such as desk lamps should not use LED bulbs as close as possible.
When the news came out, there were different opinions. Some netizens immediately said that they will no longer use LED desk lamps, but many people have expressed objection, saying that this statement has the suspicion of "indiscriminately killing LED sticks." The report can only target "three inferior LEDs." LED lights that are generally optimistic in the industry, is there a hidden danger of damage to the retina? Come listen to the analysis of ophthalmologists and lighting source experts.
Foreign expert opinion
Long-term use of LEDs may damage the retina
According to British media reports, research by Celia Sánchez-Ramos of Complutense Uni-versityinMadrid in Spain shows that the light emitted by LED lights is a short-wave high-energy light source. It is blue and violet in the visible light spectrum. Exposure to this kind of light for a long time may cause damage to people's retina.
Dr. Kasans Ramons also pointed out that the light radiation emitted by energy-saving lamps can cause serious damage to human retinal pigment epithelial cells. To this end, he suggested that LED lamps should be used as close as possible to lamps such as desk lamps. Try not to look directly at the light source with your eyes, and pay attention to the time of use. Close your eyes every 20-30 minutes and rest for a while.
Ophthalmologist opinion
Blu-ray, high brightness, may hurt the eyes
Lu Jinhua, a senior optometrist and optic optometry expert at the Zhongshan Ophthalmic Center of Sun Yat-Sen University, said that different wavelengths of light have different penetrating power. Lights that are harmful to the eyes are mainly high-energy short-wave light, such as ultraviolet light, blue light, and violet light. The most comfortable thing for the human eye is the medium-wave green light. The blue-violet light penetration is stronger than the short-wave ultraviolet light. The energy in the visible spectrum is relatively high. It can penetrate the cornea and the lens and reach the retina. Once the retina is damaged, it will cause irreversible damage. Therefore, the most important damage to the human eye in nature is the short-wave, relatively high-energy ultraviolet and blue-violet light.
Generally, the LED light has a single light color, high brightness, high color temperature, and may contain more blue light components. "For a cell, if it accepts a high-energy photon, it may cause some damage to its nucleic acids and proteins, causing the entire cell to be fatally threatened."
"I think that the research of the expert in Spain mentioned that the damage of LED to the eyes is mainly directed to the blue component in it. After a long time, it may cause irreparable damage to the retina. This may be reasonable. ."
Lu Jinhua believes that LED lighting may be harmful in two aspects. The first is that the blue light content is more, which damages the retina. The second is that some products are too bright, which will stimulate the eye to constantly adjust and cause eye fatigue.
In addition, LEDs may also form glare. Glare means that the local brightness is too high and is not proportional to the surrounding environment, causing the retina to produce bright and dark areas, resulting in dramatic changes in the pupil. Glare can cause eye irritation and other problems. If the glare phenomenon and the stimulating stimulus are relatively large, it will have a negative impact on the human eyesight. If it is in the blue light hazard and glare phenomenon for a long time, it will add importance to fatigue and damage the optic nerve, especially the visual acuity of young people whose vision has not stabilized for a while.
Lu Jinhua also stressed that on the other hand, LED lamps are the most promising source of energy conservation and environmental protection. "We cannot deny it because of the current state of the art and some inferior products. We must also acknowledge that there are Some of the better quality LEDs, and will continue to improve the process in the future, such as making the color temperature more gentle, reducing the blue light content, the brightness design is more reasonable."
Illumination source expert clarification
Blue light blue light hazard
Xu Qinghui, design director and senior lighting designer of Guangzhou Kebo Lighting Engineering Design Co., Ltd. told reporters that “blue light hazard†is just a noun, not “blue light=hazardâ€. Reasonable use, quantitative evaluation, qualified LED can be used with confidence.
Xu Qinghui explained, "LEDs need to emit blue light first, then emit phosphors, then excite phosphors, emit yellow light, and cross into white light. The color temperature is formed by the difference between the two waves. If it is cool, it is very white. The light, the blue light component is a little more, the yellow light is less, this is the high color temperature, otherwise it is the low color temperature. When people find that the high color temperature LED light has a very high peak in the blue light, just coincides with the blue light hazard. The position of the peak, so it is considered that the high color temperature LED is risky in terms of blue light hazard. This statement is correct. But it does not mean that the high color temperature LED must be harmful to the human eye, but it is more likely to compare it. Big.
Proper use of qualified LEDs does not hurt the eyes
According to the European Union's test standard IEC/EN62471 for laser products (including LED), and the photobiosafety of China's national standard GB/T20145-2006 lamp and lamp system, Blu-ray retinal hazards can be divided into four types: no danger, low Danger (category 1), medium risk (type 2), high risk (category 3).
In accordance with relevant international regulations, if the manufacturer provides a indication that the radiance of the luminaire is non-hazardous or of low risk (Class 1), the certification body can accept such LED luminaires and believe that it will not produce photobiological hazards under normal conditions. If the radiance of the luminaire is of Class 2 or Class 3, no warning mark can be used directly.
Recently, at the lighting forum held in Shanghai, experts from the academic, industry, and medical circles reached a basic consensus. The main conclusion is that the correct use of qualified general-purpose white LED products is completely safe for the human eye.
The experts at the meeting also reached a consensus that blue light is the basic component of white light. Like daylight and traditional light sources, white LEDs also contain blue light. Appropriate amount of blue light is not only necessary to ensure the color rendering performance of the light source, but also has a regulating effect on the human circadian rhythm.
The damage of blue light to the retina is mainly caused by excessive radiation with a wavelength of 400-500 nm. The data calculated by various light sources and daylight spectra and the measurement results of authoritative laboratories at home and abroad indicate that the blue light content of white LED light source is not higher than the traditional light source and daylight such as fluorescent lamp and metal halide lamp under the same color temperature; white LED light source is in human The amount of blue light irradiation on the retina of the eye is similar to that of traditional light sources such as fluorescent lamps and metal halide lamps, and belongs to category 0 and class 1 safety lighting products.
( This article is reproduced on the Internet. The texts and opinions expressed in this article have not been confirmed by this site, nor do they represent the position of Gaogong LED . Readers need to verify the relevant content by themselves. )
When the news came out, there were different opinions. Some netizens immediately said that they will no longer use LED desk lamps, but many people have expressed objection, saying that this statement has the suspicion of "indiscriminately killing LED sticks." The report can only target "three inferior LEDs." LED lights that are generally optimistic in the industry, is there a hidden danger of damage to the retina? Come listen to the analysis of ophthalmologists and lighting source experts.
Foreign expert opinion
Long-term use of LEDs may damage the retina
According to British media reports, research by Celia Sánchez-Ramos of Complutense Uni-versityinMadrid in Spain shows that the light emitted by LED lights is a short-wave high-energy light source. It is blue and violet in the visible light spectrum. Exposure to this kind of light for a long time may cause damage to people's retina.
Dr. Kasans Ramons also pointed out that the light radiation emitted by energy-saving lamps can cause serious damage to human retinal pigment epithelial cells. To this end, he suggested that LED lamps should be used as close as possible to lamps such as desk lamps. Try not to look directly at the light source with your eyes, and pay attention to the time of use. Close your eyes every 20-30 minutes and rest for a while.
Ophthalmologist opinion
Blu-ray, high brightness, may hurt the eyes
Lu Jinhua, a senior optometrist and optic optometry expert at the Zhongshan Ophthalmic Center of Sun Yat-Sen University, said that different wavelengths of light have different penetrating power. Lights that are harmful to the eyes are mainly high-energy short-wave light, such as ultraviolet light, blue light, and violet light. The most comfortable thing for the human eye is the medium-wave green light. The blue-violet light penetration is stronger than the short-wave ultraviolet light. The energy in the visible spectrum is relatively high. It can penetrate the cornea and the lens and reach the retina. Once the retina is damaged, it will cause irreversible damage. Therefore, the most important damage to the human eye in nature is the short-wave, relatively high-energy ultraviolet and blue-violet light.
Generally, the LED light has a single light color, high brightness, high color temperature, and may contain more blue light components. "For a cell, if it accepts a high-energy photon, it may cause some damage to its nucleic acids and proteins, causing the entire cell to be fatally threatened."
"I think that the research of the expert in Spain mentioned that the damage of LED to the eyes is mainly directed to the blue component in it. After a long time, it may cause irreparable damage to the retina. This may be reasonable. ."
Lu Jinhua believes that LED lighting may be harmful in two aspects. The first is that the blue light content is more, which damages the retina. The second is that some products are too bright, which will stimulate the eye to constantly adjust and cause eye fatigue.
In addition, LEDs may also form glare. Glare means that the local brightness is too high and is not proportional to the surrounding environment, causing the retina to produce bright and dark areas, resulting in dramatic changes in the pupil. Glare can cause eye irritation and other problems. If the glare phenomenon and the stimulating stimulus are relatively large, it will have a negative impact on the human eyesight. If it is in the blue light hazard and glare phenomenon for a long time, it will add importance to fatigue and damage the optic nerve, especially the visual acuity of young people whose vision has not stabilized for a while.
Lu Jinhua also stressed that on the other hand, LED lamps are the most promising source of energy conservation and environmental protection. "We cannot deny it because of the current state of the art and some inferior products. We must also acknowledge that there are Some of the better quality LEDs, and will continue to improve the process in the future, such as making the color temperature more gentle, reducing the blue light content, the brightness design is more reasonable."
Illumination source expert clarification
Blue light blue light hazard
Xu Qinghui, design director and senior lighting designer of Guangzhou Kebo Lighting Engineering Design Co., Ltd. told reporters that “blue light hazard†is just a noun, not “blue light=hazardâ€. Reasonable use, quantitative evaluation, qualified LED can be used with confidence.
Xu Qinghui explained, "LEDs need to emit blue light first, then emit phosphors, then excite phosphors, emit yellow light, and cross into white light. The color temperature is formed by the difference between the two waves. If it is cool, it is very white. The light, the blue light component is a little more, the yellow light is less, this is the high color temperature, otherwise it is the low color temperature. When people find that the high color temperature LED light has a very high peak in the blue light, just coincides with the blue light hazard. The position of the peak, so it is considered that the high color temperature LED is risky in terms of blue light hazard. This statement is correct. But it does not mean that the high color temperature LED must be harmful to the human eye, but it is more likely to compare it. Big.
Proper use of qualified LEDs does not hurt the eyes
According to the European Union's test standard IEC/EN62471 for laser products (including LED), and the photobiosafety of China's national standard GB/T20145-2006 lamp and lamp system, Blu-ray retinal hazards can be divided into four types: no danger, low Danger (category 1), medium risk (type 2), high risk (category 3).
In accordance with relevant international regulations, if the manufacturer provides a indication that the radiance of the luminaire is non-hazardous or of low risk (Class 1), the certification body can accept such LED luminaires and believe that it will not produce photobiological hazards under normal conditions. If the radiance of the luminaire is of Class 2 or Class 3, no warning mark can be used directly.
Recently, at the lighting forum held in Shanghai, experts from the academic, industry, and medical circles reached a basic consensus. The main conclusion is that the correct use of qualified general-purpose white LED products is completely safe for the human eye.
The experts at the meeting also reached a consensus that blue light is the basic component of white light. Like daylight and traditional light sources, white LEDs also contain blue light. Appropriate amount of blue light is not only necessary to ensure the color rendering performance of the light source, but also has a regulating effect on the human circadian rhythm.
The damage of blue light to the retina is mainly caused by excessive radiation with a wavelength of 400-500 nm. The data calculated by various light sources and daylight spectra and the measurement results of authoritative laboratories at home and abroad indicate that the blue light content of white LED light source is not higher than the traditional light source and daylight such as fluorescent lamp and metal halide lamp under the same color temperature; white LED light source is in human The amount of blue light irradiation on the retina of the eye is similar to that of traditional light sources such as fluorescent lamps and metal halide lamps, and belongs to category 0 and class 1 safety lighting products.
( This article is reproduced on the Internet. The texts and opinions expressed in this article have not been confirmed by this site, nor do they represent the position of Gaogong LED . Readers need to verify the relevant content by themselves. )
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