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2. Sunglasses - Wikipedia

   en.wikipedia.org/wiki/Sunglasses

   Inuit snow goggles function by reducing exposure to sunlight, not by reducing its intensity. Since the 13th century and until the spread of contemporary UV-shielding spectacles against snowblindness, Inuit made and wore snow goggles of flattened walrus or caribou ivory with narrow slits to look through to block almost all of the harmful reflected rays of the sun.

3. Photokeratitis - Wikipedia

   en.wikipedia.org/wiki/Photokeratitis

   Photokeratitis can be prevented by using sunglasses or eye protection that transmits 5–10% of visible light and absorbs almost all UV rays. Additionally, these glasses should have large lenses and side shields to avoid incidental light exposure. Sunglasses should always be worn, even when the sky is overcast, as UV rays can pass through ...

4. Transparency and translucency - Wikipedia

   en.wikipedia.org/wiki/Transparency_and_translucency

   The states in different materials vary in the range of energy that they can absorb. Most glasses, for example, block ultraviolet (UV) light. What happens is the electrons in the glass absorb the energy of the photons in the UV range while ignoring the weaker energy of photons in the visible light spectrum.

5. Solar viewer - Wikipedia

   en.wikipedia.org/wiki/Solar_viewer

   Solar viewers manufactured prior to 2015 may have a three-year limit before they can no longer effectively filter out UV radiation and should no longer be used. Starting in 2015, products manufactured to meet the standards of ISO 12312-2 can be used indefinitely as long as they have not been damaged by scratches or tears. [3]

6. Where to buy solar eclipse glasses and how to know if they're ...

   www.aol.com/lifestyle/solar-eclipse-glasses-2024...

   Regular sunglasses will not protect your eyes during an eclipse. ... view of the moon completely blocking out the sun's rays for a short time. The path for the best viewing runs through Oklahoma ...

7. Ultraviolet - Wikipedia

   en.wikipedia.org/wiki/Ultraviolet

   Ultraviolet radiation, also known as simply UV, is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight , and constitutes about 10% of the total electromagnetic radiation output from the Sun.