Normal lighting is absolutely harmless to the skin! If even the lamp is worried about damaging your skin, do you dare to go out during the day? The most harmful to the skin is ultraviolet light, which is almost absent in the light. And even the ultraviolet rays of the sun, you can't say not to let the skin contact, otherwise, the damage is even greater!
The main harm of ultraviolet rays
When ultraviolet rays are irradiated, the degree of eye injury is directly proportional to the time, inversely proportional to the square of the distance from the irradiation source, and related to the projection angle of light.
When ultraviolet rays strongly act on the skin, photodermatitis may occur, including erythema, itching, blisters, edema, eye pain, tears and so on. Appear on the skin; In severe cases, it can also cause skin cancer.
Ultraviolet rays act on the central nervous system, which may lead to headache, dizziness and elevated body temperature. When it acts on the eyes, it can cause conjunctivitis and keratitis, called actinic ophthalmia, and it may also induce cataracts. The ultraviolet rays generated in the welding process will make the welder suffer from electro-optic ophthalmia (curable).
Although ultraviolet rays exist all year round, and the sunshine is mild and foggy in winter in the north, ultraviolet rays are only a little weaker than in summer.
20% will still cause great harm to human skin and eyes, so ultraviolet radiation should be avoided in winter. Long-term ultraviolet radiation is most likely to cause various stains on the skin. Therefore, even in the cold winter, you should wear sunscreen or sunscreen outdoors. Of course, SPF index 15 is enough. If you go skiing or stay in the snow for a long time, you'd better wear goggles to prevent ultraviolet rays and strong white light from irritating your eyes.
A large number of chemicals have destroyed the ozone layer in the atmosphere and this natural barrier to protect human health. According to the report provided by the National Meteorological Center, the total ozone layer in China has been decreasing year by year since 1979.
The ozone layer has decreased by 14% in 20 years. When the ozone layer decreases 1%, the incidence of skin cancer will increase by 3%. The Beijing Meteorological Bureau released the ultraviolet index of Beijing to help people prevent ultraviolet radiation correctly.