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A visor (also spelled vizor) is a surface that protects the eyes, such as shading them from the sun or other bright light or protecting them from objects. Nowadays many visors are transparent, but before strong transparent substances such as polycarbonate were invented, visors were opaque like a mask .
Welding glass protects against glare and flying sparks. It is a more extreme implementation of the same idea as sunglasses, suited to the more intense light generated during welding. Arc welding goggles must be much darker than blowtorch goggles. Shades 12, 13, and 14 welding glass must be used to stare directly at the sun or a solar eclipse.
The NCAA banned the use of tinted and reflective visors in 2006. [1] An eyeshield, also referred to as a visor, is a piece of gridiron football equipment that was invented in the 1980s. [2] In the mid 1990s, as an effort to prevent brain and head injuries, headgear became mandatory in the game of football. [3]
That feels exorbitant; they're just flimsy pieces of plastic, after all, easily lost or broken. They should be $10 apiece, maybe three for $20. Still, there's no denying the appeal of glasses that ...
Safety glasses provide protection from external debris, and should provide side protection via a wrap-around design or side shields. [ 14 ] Goggles provide better protection than safety glasses, and are effective in preventing eye injury from chemical splashes, impact, dusty environments and welding. [ 14 ]
In the 1940s, manufacturers figured out how to sand and make safety glasses and goggles for welders, construction workers, and the like. In the early 1960s the U.S. government sponsored experiments testing the ballistic performance of various plastics and glass for potential use in eyewear, using tests similar to those required by today's U.S ...
A visor was an armored covering for the face often used in conjunction with Late Medieval war helmets such as the bascinet or sallet. [1] The visor usually consisted of a hinged piece of steel that contained openings for breathing and vision. Appropriately, breaths refers to the holes in the metal of the visor. [2]
In 1991, NII Stali produced the titanium shells, aramid liners and titanium visors, while the armored glass was bought from abroad, and all of this was assembled together by KGB. This early variant was called Altyn-R1 (Алтын-Р1). [2] Helmet was rated at class 2 protection for the shell and class 1 protection for the visor.