Radiation: Ultraviolet (UV) radiation - World Health Organization …
2016年3月9日 · The sun is by far the strongest source of ultraviolet radiation in our environment. Solar emissions include visible light, heat and ultraviolet (UV) radiation. Just as visible light consists of different colours that become apparent in a rainbow, the UV radiation spectrum is divided into three regions called UVA, UVB and UVC.
Ultraviolet radiation - World Health Organization (WHO)
2022年6月21日 · Ultraviolet radiation (UVR) can neither be seen nor felt. While some people are exposed to artificial UVR sources (e.g. in medicine, industry and for disinfection and cosmetic purposes), everyone is exposed to solar UVR. Solar UVR levels are influenced by several factors: Sun elevation: the higher the sun in the sky, the higher the UVR level.
Ultraviolet radiation - World Health Organization (WHO)
2024年7月29日 · Ultraviolet (UV) radiation covers the wavelength range of 100–400 nm, which is a higher frequency and lower wavelength than visible light. UV radiation comes naturally from the sun, but it can also be created by artificial sources used in industry, commerce and recreation.
Radiation: The known health effects of ultraviolet radiation
2024年7月16日 · Current scientific evidence suggests that different forms of eye cancer may be associated with UV exposure. Uveal melanoma, the most frequent cancer of the eyeball, sometimes requires surgical removal and is associated with high mortality. Evidence of an association with ultraviolet exposure is mixed.
Radiation: The ultraviolet (UV) index - World Health Organization …
2022年6月20日 · What is the UV index? a measure of the level of UV radiation; the values of the index range from zero upward - the higher the UVI, the greater the potential for damage to the skin and eye, and the less time it takes for harm to occur; an important vehicle to alert people about the need to use sun protection.
Raising awareness on ultraviolet radiation - World Health …
2020年4月24日 · Small amounts of ultraviolet (UV) radiation are essential to produce vitamin D in people, yet overexposure to sunlight may result in acute and chronic health effects on the skin, eye and immune system.The rise in the incidence of skin cancers over the past decades is strongly related to increasingly popular outdoor activities and recreational exposure. Experts …
Solar ultraviolet (UV) radiation exposure - World Health …
As part of a broader project to assess major risk factors to health, the burden of disease resulting from exposure to ultraviolet (UV) radiation was assessed. Definition: The estimates presented are population-weighted average daily ambient UVR level (in J/m2) for the years 1997–2003 for selected countries.
Ultraviolet (UV) radiation - World Health Organization (WHO)
The main factor that predisposes to the development of skin cancer is exposure to ultraviolet (UV) radiation, traditionally from the sun and more recently from artificial tanning sunbeds. Both solar radiation and sunbeds are classified as carcinogenic to humans by the WHO International Agency for Research on Cancer (IARC).
Radiation: Ultraviolet (UV) radiation and skin cancer
2017年10月16日 · Effects of ultraviolet (UV) radiation on the skin, eye and the immune system. Radiation: The known health effects of ultraviolet radiation. Ultraviolet (UV) radiation. The ultraviolet (UV) index. Read more. Global solar UV index : a practical guide. Radiation and health. Ultraviolet radiation
Global solar UV index : a practical guide - World Health …
2002年6月13日 · The Global Solar UV Index (UVI) described in this document is a simple measure of the UV radiation level at the Earth’s surface and an indicator of the potential for skin damage. It serves as an important vehicle to raise public awareness and to alert people about the need to adopt protective measures when exposed to UV radiation.