The lens color is not a guarantee either. The model saw more limited use throughout the 1980s and 1990s, aided by a 1982 product placement deal, featured most notably in Top Gun and Cobra, with both films causing a 40% rise in 1986. Mirrored lenses have a metallic, partially reflective coating on the outer surface combined with a tinted glass lens.

Polarized glasses can help reduce glare and improve your sharpness of vision, especially in bright conditions; however, they have been specially treated to achieve this effect, and require special care to maintain their effectiveness and appearance. Sunglasses made from flat panes of smoky quartz, which offered no corrective powers but did protect the eyes from glare, were used in China in the 12th century or possibly earlier. General-purpose sunglasses may be too dark, or otherwise unsuitable for driving. 16", "Sunglasses History – The Invention of Sunglasses", "Crookes lens definition and meaning | Collins English Dictionary", http://www.ppgoptical.com/getmedia/47e39594-6472-48e7-8e2c-8f48015284c8/CR39_50years_booklet.pdf, "Cancer Council Australia; Centre for Eye Research Australia: Position Statement: Eye Protection. The lenses feature three rare earth elements, which maximize the transmission of the colours your eyes see naturally. Although sales rose to $1 million in 1941, the company's 1940 losses had reached $100,000, and it was only World War II military contracts that saved Land and his 240 employees. Polarized sunglasses have a filter that reduces glare from reflecting surfaces, (for example, water, snow, road pavement). Wrap-arounds are a style of sunglasses characterized by being strongly curved, to wrap around the face.
", "Information from Your Eye M.D. Sunglass lenses are made of either glass, plastic, or SR-91.

It promotes a number of programs in the community on the health theme. Many of the criteria for sunglasses worn when piloting an aircraft are similar to those for land vehicles.

For other uses, see, Eyewear for protecting against bright light, Inuit hero 'Nanook' from the silent documentary film. Dark lenses do not automatically filter out more harmful UV radiation and blue light than light lenses. The design was introduced in 1936 by Bausch & Lomb for issue to U.S. military aviators. These block harmful UVA, UVB, and UVC light rays. The lenses of polarized sunglasses reduce glare reflected at some angles off shiny non-metallic surfaces, such as water.
[10] The Clubmaster has a browline frame and went on to become the third best selling sunglasses style of the 1980s, behind the Wayfarer and Aviator. They can sometimes also function as a visual aid, as variously termed spectacles or glasses exist, featuring lenses that are colored, polarized or darkened. The original frames were black; frames in many different colors were later introduced. In 1969 they were used aboard the Eagle, the Lunar Module of Apollo 11, the first manned mission to land on the Moon. We use cookies to make wikiHow great.

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