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A UV index reading of 8 to 10 means very high risk of harm from unprotected sun exposure. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Minimize sun exposure between 10 a.m. and 4 p.m. If outdoors, seek shade and wear sun-protective clothing, a wide-brimmed hat, and UV-blocking sunglasses.
Blood levels of folate, a nutrient vital for fetal development, can be degraded by UV radiation, [55] raising concerns about sun exposure for pregnant women. [56] Lifespan and fertility can be adversely affected for individuals born during peaks of the 11-year solar cycle, possibly because of UV-related folate deficiency during gestation. [57]
Spend time in the shade when the sun is strongest (in the UK that is between 11:00 and 15:00 from March to October) never burn cover up with suitable clothing and do not forget sunglasses
When the index is low, the EPA says you don’t need much protection from the sun. But when it’s three or higher, you should seek shade and generously apply a broad-spectrum SPF of 30 or higher ...
Sun damage can show up in different ways, and it can be acute — meaning, you see the damage right away — or chronic, meaning it develops after prolonged exposure to UV rays. An obvious acute ...
At ground level with the sun at zenith, sunlight is 44% visible light, 3% ultraviolet, and the remainder infrared. [ 22 ] [ 23 ] Of the ultraviolet radiation that reaches the Earth's surface, more than 95% is the longer wavelengths of UVA, with the small remainder UVB.
UV-B lamps are lamps that emit a spectrum of ultraviolet light with wavelengths ranging from 290–320 nanometers. This spectrum is also commonly called the biological spectrum due to the human body's sensitivity to light of such a wavelength. [ 1] UV-B light does not tan the skin very much, compared to the UV-A lamps that are used in tanning ...
Ultraviolet light therapy or ultraviolet phototherapy is a treatment for psoriasis, atopic skin disorder, vitiligo and other skin diseases. There are two main treatments: UVB that is the most common, and PUVA. There are four UVB types of lamps: Fluorescnt Broad-Band UVB that emit 280-330 nanometer, Fluorescent Narrow-Band that emit 312 ...