Radiation: Ultraviolet (UV) radiation - World Health Organization …
Mar 9, 2016 · The UV region covers the wavelength range 100-400 nm and is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm). Short-wavelength UVC is the most damaging type of UV radiation. However, it is completely filtered by the atmosphere and does not reach the earth's surface.
Ultraviolet radiation - World Health Organization (WHO)
Jun 21, 2022 · Skin cancers are caused primarily by exposure to ultraviolet radiation (UVR), either from the sun or from artificial sources such as sunbeds. Globally in 2020, over 1.5 million cases of skin cancers were diagnosed and over 120 000 skin cancer-associated deaths were reported. Worldwide, it is estimated that 15 million people are blind due to ...
Radiation: The known health effects of ultraviolet radiation
Jul 16, 2024 · UV-A and UV-B rays also differ from each other by how strong their energy is, with UV-A rays having a lower amount of energy. UV-A and UV-B can therefore trigger different biological and health effects. The skin. UV-A penetrates deep into the skin and can reach the dermis and subcutis, where connective tissue and blood vessels are affected ...
Ultraviolet radiation - World Health Organization (WHO)
Jul 29, 2024 · Ultraviolet radiation. 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 ultraviolet (UV) index - World Health Organization …
Jun 20, 2022 · The UVI is 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. The UVI is an important vehicle to alert people about the need to use sun protection. A marked increase in the incidence ...
Radiation: Effects of ultraviolet (UV) radiation on the skin, eyes and ...
Sep 17, 2003 · Acute effects of UV radiation exposure include photokeratitis and photoconjunctivitis. These inflammatory reactions are comparable to a sunburn of the very sensitive skin-like tissues of the eyeball and eyelids, and usually appear within a few hours of exposure. Both can be very painful, but are reversible and do not result in any long-term ...
Radiation: Ultraviolet (UV) radiation and skin cancer
Non-melanoma skin cancers are most frequent on parts of the body that are commonly exposed to the sun such as ears, face, neck and forearms. This implies that long-term, repeated UV radiation exposure is a major causal factor. Within some countries there is a clear relationship between increasing incidence of non-melanoma skin cancers with ...
Radiation: Sun protection - World Health Organization (WHO)
Sep 13, 2003 · Shade, clothing and hats provide the best protection – applying sunscreen becomes necessary on those parts of the body that remain exposed like the face and hands. Sunscreen should never be used to prolong the duration of sun exposure. Limit time in the midday sun. The sun’s UV rays are the strongest between 10 a.m. and 4 p.m.
Health consequences of excessive solar UV radiation
Jul 25, 2006 · In addition, UVR causes sunburn, skin photoageing, cortical cataracts (eye lens opacities), pterygium (a fleshy growth on the surface of the eye), reactivation of herpes of the lip (cold sores) and the rare squamous cell carcinomas of the eye. "This global assessment of the health risks of UV radiation provides a good basis for public health ...
Ultraviolet (UV) radiation - World Health Organization (WHO)
<p>One in every three cancers diagnosed is a skin cancer. 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).</p><p>Small ...