At present, some office buildings and schools mainly use artificial lighting during the day and at night. Although these artificial lighting can meet people's lighting needs, due to the lack of some radiation rays in full-spectrum natural light in indoor light, people have little chance of long-term exposure to natural light, and related health problems will gradually emerge, which is difficult to meet people's physiological needs.
What are the psychological effects of light on people?
Light directly affects people's psychological activities and emotions by acting on the cerebral cortex. Such as ultraviolet rays, light color, color temperature, light flashing, etc. will have an effect on people's psychology, thus affecting people's physical and mental health. Insufficient light for a long time will cause visual tension, make the body easily tired, distracted, memory decline, and reduce abstract thinking and logical thinking ability. Overexposure of eyes not only makes people feel uncomfortable, but also makes people sick. For example, if you are exposed to strong sunlight for a long time, the cornea will be damaged, causing cataracts, and there will be symptoms such as upset and depression. At the same time, people's skin will turn black or red, which will make people numb. The intense colored light in artificial lighting will interfere with the normal activities of the brain center, disturb the balance of the human body, and make people fidget, lack of knives and dizziness. Light pollution in urban lighting affects people's rest and sleep. Therefore, modern society should pay special attention to healthy lighting.
What three areas can ultraviolet light be divided into according to bands? What are the effects of differences?
In order to facilitate research and application, we divide ultraviolet radiation into three regions according to the length of wavelength, namely long-wave ultraviolet (UV-A, 3 15 ~ 400 nm), medium-wave ultraviolet (UV-B, 280 ~ 3 15 nm) and short-wave ultraviolet (UV-C,15 nm).
When sunlight passes through the earth's atmosphere, short-wave ultraviolet rays will be blocked, and only medium-wave and long-wave ultraviolet rays can reach the earth's surface. In recent years, with the periodic eruption of sunspots and the destruction and pollution of the atmospheric ozone layer by human activities such as the development of modern industry and aerospace technology, more and more ultraviolet rays reach the earth's surface in sunlight, which has become one of the main factors affecting human health.
Ultraviolet radiation penetrates deep into the skin, where melanin-like substances are oxidized to form melanin, making the skin black. If ultraviolet rays continue to irradiate, the melanin produced continuously will form pigmentation, which is the pigmentation effect, also called the black spot effect. According to the research, the effective band causing pigmentation is in the UV-A band, and its peak value is around 365 nm. Ultraviolet radiation UV-A can be used for phototherapy of beriberi, herpes and other diseases.
After receiving intense ultraviolet radiation, the epidermis will produce various chemical mediators, which will be released and spread to the dermis, causing local vasodilation, which is manifested as erythema on the skin. Medical research has found that, unlike erythema formed by burns, erythema caused by ultraviolet radiation disappears slowly. Although scientists have not fully explained the mechanism of the erythema effect, they have a unified understanding of the main ultraviolet wavelength that produces the erythema effect, that is, about 3 10nm, that is to say, the redshift effect is the ultraviolet radiation effect in UV-B band.
Calcineol in human body will synthesize vitamin D after absorbing ultraviolet rays, which is very effective in preventing rickets and osteoporosis. This is what people often say about the health effect. The radiation wavelength absorbed by calcitol is 220 ~ 320 nm, and the highest efficiency is around 280nm. For example, doctors often advise parents to take newborns to quantitative outdoor activities and bask in the sun in winter, which is very beneficial to promote the skeletal development of infants and young children. In addition, special ultraviolet lamps are used to irradiate the human body in clinic to achieve the health care effect. All of the above are typical examples of using the health effects of ultraviolet rays.
A certain amount of UVC has a great destructive effect on microorganisms, killing Escherichia coli, Shigella dysenteriae, typhoid bacteria, staphylococcus, tuberculosis, Bacillus subtilis, cereal mold and so on. The sterilization ability of ultraviolet rays varies with different wavelengths, and the peak value of sterilization is around 254nm, which means that ultraviolet rays with a wavelength of 254nm have the best sterilization effect. The bactericidal effect of ultraviolet rays has been widely used in medical care and food industry. The most common thing is to sterilize the air and medical articles in the ward, which is the sterilization effect of ultraviolet rays.
How does the human eye feel when the light and dark environment changes?
When people suddenly enter the dark environment from the bright environment, they begin to be dark and can't see the objects around them clearly. It takes a few minutes to get used to it. On the one hand, the pupil is enlarged to increase the light radiation entering the eye, on the other hand, the rod-shaped cells of the eye recover their activity and play a photosensitive role. It takes about 30 to 40 minutes to fully adapt to the dark environment. If you enter a bright environment from a dark environment, you will feel dazzling and uncomfortable at first, but you will soon get used to it and return to normal visual function. If there is a transition zone between light and dark environment, the eyes will be much more comfortable. For example, in the museum, when visitors quickly enter the exhibition hall with low illumination from the bright outdoor or hall, their eyes will be very uncomfortable. A well-designed museum has a light environment transition zone at the entrance and exit of the exhibition hall, so that the audience's eyes can better adapt to the changes of light and dark scenes.
What color of light are people most sensitive to at night?
There are obvious differences in color sensitivity between human cone cells and rod cells.
Cone cells are most sensitive to the yellow-green region of the spectrum. When all colors are tested in the sun, yellow-green light will be the brightest. But which color is the most sensitive to rod cells? In fact, rod cells do not produce color vision. If you use very dark but colored light, your eyes will not see any color. However, there are still differences in color sensitivity of rod cells. Some research results show that rod cells are most sensitive to blue-green light (500nm). Therefore, at night or in dark light, when the vision of rod-shaped cells is dominant, the brightest color will be blue light or blue-green light. Therefore, the visibility can be improved by using the abundant light in the blue band at night.
What effect does color have on people? How to use colored light for treatment?
Color can be divided into the color of environmental objects and the color of lighting. The color and illumination of environmental objects have great influence on people's emotions. These colors act on human senses, stimulate people's nerves, and then have emotional and psychological effects. Scientific research has found that red makes people excited, blue makes people quiet, orange stimulates appetite, and black makes people depressed, fearful and nervous.
Practice has proved that setting up wards with different colors in hospitals, supplemented by drugs, will receive good results. The ward should use soft colors with high brightness and low color purity to make patients feel light and clean. Purple environment can comfort pregnant women. Foreign experiments also show that light blue environment can reduce fever in patients with high fever; Brown environment can help hypertensive patients lower their blood pressure; Turquoise of plants has a calming effect on people's psychology, a sense of cleanliness, and a physiological effect of lowering blood pressure and smoothing pulse. Medical researchers in Paris have confirmed that if 90% of heart patients live in red environment, their heartbeat frequency will increase, while in light blue and pink environment, they will have the effect of reducing their heartbeat. In Canada, in some dental clinics, painting the walls blue can relieve patients' nervousness. Scientists also found that when a manic is angry, put him in a room painted pink and the patient will soon calm down.
In medicine, various colored lights can be used for irradiation treatment, and each colored light has its specific frequency and curative effect. Such as long-term red light and short-term green light, suitable for all kinds of cold diseases, such as rosacea and muscle sprain; Short-term irradiation with orange and blue light is effective for some thermal diseases such as burns and arthritis. The combination of green light and transient red light is suitable for wet lesions, such as night sweats and edema. In addition, in some hospitals, the use of colored lights to increase the pleasant atmosphere in the hospital will make patients feel comfortable.
What should be paid attention to in the lighting environment of classrooms and families for the eyesight health of primary and secondary school students?
Now primary and secondary school students spend a long time in the classroom every day. The light environment in the classroom is very important for the eyesight health of primary and secondary school students. Classroom lighting should meet the requirements of lighting design standards promulgated by the state. The illumination of the classroom table should reach 300lx, the illumination of the blackboard surface should reach 500lx, and the illumination distribution should be uniform. The selection and installation of lamps and lanterns should also avoid glare. Classrooms with good lighting conditions can mainly rely on natural lighting during the day, and turn on the lights manually when necessary. Curtains need to be installed in the classroom to avoid glare when the sun shines.
The light environment for students to study at home is also an important link to ensure their eyesight health. When studying at night, in addition to general indoor lighting, reading desk lamps should be used for local lighting on the writing desk, and lamps with reasonable power, no strobe and reasonable light distribution control should be selected. It should be noted that the desktop illumination is higher than the ambient illumination, which makes the vision comfortable and healthy and helps to improve the learning efficiency; But you can't just turn on the desk lamp on the desktop to save electricity, so as not to cause visual fatigue.
How to pay attention to the eyesight health of the elderly and create a living light environment suitable for the elderly?
The visual characteristics of the elderly are different from those of the young. The cornea and lens of the eyes of the elderly gradually turn yellow, and the ability to distinguish colors decreases, and the ability to distinguish color differences decreases. For colors with similar tones, such as red and orange, blue and green, their ability to control the amount of light entering their eyes is weakened, their adaptability to bright environment or from dark environment to bright environment is weakened, and they are more sensitive to glare.
Therefore, the living environment of the elderly should appropriately improve indoor illumination, improve the uniformity of room brightness, and avoid sudden changes in light brightness. Do a good job of shading lights to avoid glare. The electric light source with good color rendering should be selected, which is beneficial for the elderly to correctly distinguish indoor colors. It is better to have dimming function, so as to adjust according to different seasons, different moods and different visual needs.
What can cause people's visual fatigue?
Visual fatigue refers to the syndrome caused by eye symptoms such as blurred vision, puffiness, dryness, tears, eye socket pain, headache, dizziness, nausea, irritability and fatigue after long-term close observation.
There are many factors that cause eye fatigue. The brightness of the display, the radiation of electromagnetic waves, the flicker and reflection of the fluorescent screen will all cause visual fatigue. Long-term close use of eyes and glasses with inappropriate diopter, too deep diopter or high astigmatism can also cause visual fatigue. Please pay attention to the following questions:
1) working posture and distance. Incorrect working posture, too close to the computer screen, makes the eyes more vulnerable to radiation injury. Especially when using a notebook computer, because the screen is too small, the user must work at close range, with his head leaning forward and neck muscles exerting force, which is easy to aggravate eye fatigue.
2) Screen quality and clarity. Some computers are used for too long, which leads to poor screen definition and image quality, thus causing reading difficulties and eye fatigue.
3) Working environment. The ambient light is too strong or too weak, resulting in a strong reaction between the screen and the outside world, which is easy to cause irritation to the eyes.
The degree of eye fatigue is related to the length of working hours. Therefore, the best way to avoid eye fatigue is to pay attention to eye rest instead of continuous operation. After using the computer continuously every 1 hour, you should move the eye nitrile away from the computer 10 ~ 15 min and look far away to relax your eyes. Posture and distance at work are also important. Keep your eyes and screen above 30cm as far as possible, and adjust the most appropriate posture to keep the line of sight down about 30. This angle can relax the neck muscles and reduce eye fatigue.
Why is stroboscopic harmful to our visual system?
The waveform of AC power grid in China fluctuates up and down 50 times per second, which is called 50Hz frequency. Fluorescent tubes use 50Hz commercial power, and electrodes at both ends alternately serve as cathode and anode, which changes by 100 times per second, that is to say, there will be 100 flashes of light and shade every second, which is also commonly known as "stroboscopic" because of the frequency of alternating current. The human eye needs to adjust and adapt to the light and shade of the environment. The process of vision adjustment and adaptation is completed by enlarging or narrowing the pupil of the eye and the conversion between cone cells and rod cells, which takes some time. We can't feel its flicker for a short time, but reading a book under the stroboscopic light source for a long time will definitely make the sphincter and retina tired, sore and even hurt the optic nerve due to excessive use. Strobe can cause eye fatigue and eye pain, then dizziness and headache, then upset and nervous, and even tachycardia.
What are the advantages of using tricolor electronic ballast fluorescent lamp to protect eyes?
The color rendering index of tricolor fluorescent lamp is above 80, which is better than ordinary fluorescent lamp (the color rendering index of ordinary fluorescent lamp is only 60). The light environment of tricolor fluorescent lamp is more comfortable for eyes. In addition, the stroboscopic flash generated by general fluorescent lamps is not conducive to visual comfort. The electronic ballast in the tricolor electronic ballast fluorescent lamp changes the AC power supply into DC, and then changes the DC into high-frequency AC output lighting after electronic inversion. High-frequency alternating current, the current is almost continuous, which fundamentally eliminates the harm of "stroboscopic" to vision. Such oblique lighting on computer or TV screen can also eliminate more than 90% stroboscopic display, reduce visual fatigue and obviously improve lighting quality.
What should I pay attention to when buying "eye protection lamps" in the market?
First of all, it should be pointed out that the so-called "eye protection lamp" is a common name for promoting reading desk lamps in the market. Because of the electronic ballast that can reduce the stroboscopic effect, people's eyes can't feel the stroboscopic effect of light when using it. Secondly, three-color lamps with good color rendering are used. Compared with ordinary lighting lamps, eye protection lamps are soft in color and close to natural light. Finally, the lampshade is generally lined with a reflector, which can enhance the light effect, and at the same time, its lamp groove is deep, which can protect the eyes from direct light and avoid glare. Obviously, reading under this lamp will make people feel much more comfortable and protect their eyes.
However, there are many brands of "eye protection lamps" in the market, with mixed quality and great price difference. At present, there is no testing standard for reading desk lamps ("eye protection lamps") in China. Therefore, be careful when choosing "eye protection lamp". When selecting lamps and lanterns on site, it depends on whether the instruction manual, product introduction, product certificate and quality supervision and inspection number are complete. In terms of optical performance, from the perspective of using a desk lamp, whether the human eye can't directly see the lamp and whether the light distribution of the lamp is uniform. Whether the lamp tube is a tricolor lamp tube, we should carefully observe whether its appearance is fine and so on.
Do I need to turn on the light to watch TV and computer at night?
When watching TV, turning on and turning off the lights will directly affect the background brightness when watching TV. If all the lights are turned off, the background will be very dark, and the small bright screen will form a strong contrast with the background. Over time, our eyes will feel tired, just as we stare at the lights for a long time, watching TV in complete darkness will also increase the consumption of vitamin A in the body. If all the lights in the room are on when watching TV, the fluorescent screen will appear very dark under a bright background, which will reduce the contrast and gray level of the image, and the image will become pale and unclear, greatly affecting the viewing effect. If you look at this unclear picture for a long time, it will also affect your eyesight.
When watching TV like this, it's not good to turn it off or on. It is best to turn on a light with lower power and softer light indoors, and it is best to have a lampshade to adjust the indoor background brightness, so that the eyes don't feel tired and the reception effect is good.
Two problems should be paid attention to in the placement of low-power lamps. First, this lamp should not appear in people's vision of watching TV, so as not to distract attention and produce unnecessary stimulation; Second, the light should not be directed to the fluorescent screen, so as not to affect the image quality. Some families have designed a background wall behind the TV. Clever handling of background light and light is also a good plan.
Do you know the beneficial effects of infrared rays on human body?
Infrared ray has stronger ability to penetrate clouds than visible light, and is widely used in communication and detection. It has a strong thermal effect and is easily absorbed by objects. It is usually used as a heat radiation source for medical treatment. Infrared rays have strong penetrating power to human skin and subcutaneous tissue. Infrared radiation can raise the temperature of skin and subcutaneous tissue, promote blood circulation and metabolism, and is beneficial to people's health. The thermal effect, anti-inflammatory effect and promoting regeneration of infrared physiotherapy on tissues have been clinically confirmed. Usually, direct irradiation is used to treat diseased parts. Near-infrared micro-irradiation therapy has a significant effect on improving microcirculation, especially the state of micro-blood flow, which shows that the capillary blood flow speed is accelerated, the phenomenon of red blood cell aggregation is reduced, and the congestion phenomenon is alleviated or disappeared after irradiation, which has a positive effect on improving the nutrition, metabolism, repair and function of body tissues and important organs.
What kind of office lighting environment helps to improve work efficiency?
The quality of office lighting mainly depends on the illumination level and lighting quality. The lighting environment should meet the functional and technical requirements, and the room lighting should be uniform as a whole, giving full consideration to visual work and personal needs, and trying to create a pleasant working environment. The illuminance level of office space is generally between 300 and 500 LX, and the surrounding environment should have a certain illuminance level, and the illuminance of the whole lighting area should have a certain uniformity. In general, the uniformity of illumination in the office work area is greater than 0. 7. Office lighting should be concise and efficient, with reasonable light distribution, without light curtain reflection, direct glare, reflected glare, stroboscopic and shadow. Users of space can reduce visual fatigue, have a sense of relaxation, and help improve work efficiency.
What harm does the light emitted during welding do to the welder's eyes?
When welding, the welder's eyes will be stimulated by strong ultraviolet rays in arc light, which will cause electro-optic ophthalmia. The main symptoms of electro-optic ophthalmia are eye pain, tears and fear of light. It takes about 2 ~ 10 hour from the time the eyes are irradiated by arc light to the time when symptoms appear. If the secondary infection of electro-optic ophthalmia leads to corneal ulcer, corneal nebula will also appear, which will affect vision. Therefore, welders should wear special protective covers when welding.
Do you know anything about phototherapy?
Phototherapy is a method that uses sunlight or artificial light (infrared, ultraviolet, visible light and laser) to prevent and treat diseases and promote the recovery of the body. Different light will cause photochemical effect, photoelectric effect, fluorescence effect and thermal effect due to the different quantum energy of light, and these effects will become the basis of photobiology. The therapeutic effect of infrared ray is based on the warming effect, which has the functions of improving blood circulation, promoting absorption, relieving spasm, dissipating chronic inflammation and relieving pain. Anti-inflammatory mechanism of ultraviolet rays: 1. Sterilization; 2. Improve the blood circulation of the lesion; 3. Affect the body's defense immune function. Laser therapy is a method to treat diseases by using the light emitted by laser.
What kind of lighting helps to stimulate appetite?
In residential restaurants, if you choose one or more suitable and beautiful chandeliers and let the soft light gather in the center of the table, it can not only stimulate appetite, but also have the function of condensing vision and regulating dining mood. At the same time, in order to increase appetite, you can choose lamps with warm light source and good color rendering, which can better render the effect of dishes. However, it should be noted that the light should be concentrated on the desktop to avoid direct exposure to the eyes or head of the diners. The materials and forms of ceiling lamps, lampshades and bulbs need to be carefully selected to avoid dazzling light that makes people insomnia. Of course, you can also choose a chandelier with a random lifting device to adjust and choose the height.
What lighting do patients with eye diseases need?
In general families or classrooms, the lighting design is based on the illumination standard of healthy people, which is not necessarily suitable for the tongue with eye diseases. For children with low vision, it is particularly important to create suitable indoor lighting. Patients with low vision can increase or decrease the illumination according to their own conditions.
Low vision caused by the following eye diseases requires enhanced lighting.
1) The pupil of the eye is obviously narrowed.
2) Optic atrophy.
3) Pathological myopia.
4) Macular lesions.
5) aphakic eyes after operation.
6) Retinitis pigmentosa.
7) Congenital defects of retina, choroid and optic nerve.
Generally speaking, patients with low vision need high illumination, but there are also some situations that are the opposite, such as:
1) Albinism: Albinism patients can't stand strong light because of the lack of melanin in pigment film, which is suitable for low illumination.
2) Cataract: Especially for patients with nuclear or posterior capsule opacity, low illumination is required, and yellow filter can be added if necessary. After the illumination brightness is weakened, the pupil of the patient will naturally expand, so that the effective imaging beam can enter the eye through the transparent area around the lens, and the vision can be improved.
3) Congenital aniridia: This kind of patients with low vision cannot adjust the intensity of incident light due to the pupil, and their illumination can be slightly lower than that of normal people. Some children can use normal lighting.
4) Central corneal opacity: If the illumination of this kind of patients with low vision is increased by 9, the pupil will be narrowed and they can't see clearly. Using low illumination can enlarge the pupil, which is beneficial for light to enter the eyes and see things clearly.
5) Color blindness: Such patients with low vision need low light to avoid discomfort such as strong light.
What are the applications of ultraviolet rays in life?
Ultraviolet rays directly irradiate the skin, which not only has bactericidal effect, but also has the functions of regulating and improving nerves, endocrine, digestion, circulation, respiration, blood, immune system and promoting the production of vitamin D, and can also make fluorescent substances glow. For example, the ultraviolet money detector used to distinguish the authenticity of paper money adopts the above principle. Ultraviolet rays with certain intensity and wavelength will emit fluorescence after irradiating substances. According to the color of fluorescence, it can be judged whether it contains this element, such as heavy metals such as lead and mercury and pesticide residues, which can be detected by this method. Using the special sensitivity of insect compound eyes to 365nm ultraviolet light, an ultraviolet light trap was made to kill mosquitoes. A health-care ultraviolet lamp made of 280-320 nm ultraviolet rays can prevent rickets and occupational diseases after irradiating the skin. Using ultraviolet light to react with oxygen in the air to generate ozone, oil molecules can be burned cold to generate carbon dioxide and water, organic matter in oil fume is photooxidized and odor is eliminated.
What are the applications of infrared rays in life?
The main feature of infrared ray is its strong thermal effect. The temperature of various objects increases after absorbing infrared rays. Therefore, people use infrared rays to heat objects. In industry, infrared rays are used to dry paint on the surface of automobiles, in families, infrared ovens are used to bake food, in bathrooms, infrared rays are used for heating, in medical treatment, infrared rays are used for physical therapy, and in military affairs, infrared rays are used to detect human body heat and imaging effects to make night vision devices. Also, the rangefinder is a precision instrument with infrared as the carrier.
What harm does ultraviolet light do to skin and eyes in daily life?
In recent years, people have gradually realized that excessive ultraviolet rays can cause photochemical reactions and a series of changes in human functions, especially harm to human skin, eyes and immune system. Ultraviolet rays in daily life mainly come from sunlight. Of course, in addition to sunlight, artificial light sources such as fluorescent lamps, ballroom blue lamps, mosquito killer and ultraviolet germicidal lamps radiate UVA and UVB ultraviolet rays to varying degrees.
The damage to skin caused by tight lines in sunlight is mainly manifested as acute sunburn or sunburn, skin tanning or pigmentation, skin photoaging, inducing or aggravating photosensitive skin diseases and causing other biological damage, including skin cancer.
Intense sunlight will cause erythema, edema and even blisters on the skin within tens or even ten minutes. After acute injury, the skin may be rough, dehydrated and secondary to pigmentation. These phenomena are sunburn. The ultraviolet band that causes sunburn is mainly ultraviolet B (UVB).
The basic change of skin aging is the appearance of thick and deep wrinkles. UVA is the main ultraviolet band that causes skin photoaging. UVA has a strong penetrating ability, and 35% ~ 50% of UVA can reach the dermis of the skin, reducing the mature collagen in the dermis and denaturing the elastic fibers. The damage of UVA to skin is a cumulative process, and long-term UVA irradiation gradually leads to the above lesions. In recent years, the earth's ozone layer is decreasing at the rate of 1% every year. Every time the ozone layer is thinned 1%, the ultraviolet intensity on the ground will remain at 1% ~ 2%. Studies have concluded that the lame rate of human skin cancer will increase by 3%.
Intense ultraviolet rays can damage eye tissues, lead to conjunctivitis, and damage cornea and lens. Ultraviolet rays are the main cause of cataract. At noon in mid-latitude summer, observe a blank piece of paper in the sun for a few minutes. It can reach the level of hurting eyes. Preventing eyes from being overexposed by ultraviolet rays is an effective means to prevent intraocular lenses.
At present, the United States, Canada, Australia and other countries and some cities in China have begun to issue solar ultraviolet index forecasts to remind the public to guess the corresponding protective measures. At present, experts from the World Health Organization call on people engaged in outdoor activities to avoid being exposed to the sun for a long time, and Yuki, who is on vacation in coastal and mountainous areas, should pay attention to protecting her skin.
Why ultraviolet germicidal lamp is a high-risk product?
Low-voltage ultraviolet germicidal lamp mainly relies on short-wave ultraviolet radiation of 253.7nm for sterilization and disinfection. Some lamps also emit 185nm ultraviolet rays, which produce ozone in the air and also have bactericidal effect.
According to the standard "Photobiological Safety of Lamps and Lamps System" of the International Commission on Lighting, the hazard level of lamps is divided into four levels: harmless level, low hazard level, medium hazard level and high hazard level. The high risk level is defined as: the physical irradiance of 254nm ultraviolet is greater than or equal to 6 μ W/cm2; Or the effective damage irradiance is dry or equal to 3μW/cm2. It is stipulated that the threshold of human radiation is 6mJ/cm2. (physical exposure radiation) or 3mJ/cm2 (effective damage exposure radiation). The radiation amount of ultraviolet germicidal lamp in general application and other parts is easy to exceed the above value, which belongs to high-risk products. For example, for a 30W germicidal lamp, the ultraviolet irradiance at 1 m is 107μW/cm2, and the physical exposure radiation reaches 6mJ/cm2 in less than 1 min (about 56s).
Nowadays, in addition to factories and hospitals, more and more products are sterilized by ultraviolet rays at home. Therefore, strict protection measures must be taken in use, and corresponding regulations must be met to ensure reasonable and safe application.
What harm does infrared ray do to the skin in daily life?
Infrared rays do different harm to the skin than ultraviolet rays. Infrared rays have direct adverse effects on the skin through its thermal radiation effect, such as the increase of skin temperature, the expansion and congestion of capillaries, and the increase of epidermal water evaporation. Its main manifestations are red papules, premature aging of skin and pigment disorder.