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Ballistic sunglasses or prescription eyeglasses must meet the same requirements. In brief, the U.S. military standard requires that ballistic eyewear must be able to withstand up to a 3.8 mm (.15 caliber) projectile at 195 m/s (640 ft/s)) for spectacles and 5.6 mm (.22 caliber) projectile at 168–171 m/s (550–560 ft/s) for goggles.
Zenni Optical mail order. Zenni Optical was founded in 2003 by Tibor Laczay and Julia Zhen. [1] [2] Before being renamed to Zenni Optical when it began offering $7 and $8 glasses, the company was named 19dollareyeglasses.com. [3] [4] [5] Around 2014, co-founder Zhen acquired the building occupied by the Marin Independent Journal to house Zenni. [6]
GI glasses are eyeglasses issued by the American military to its service members. Dysphemisms for them include the most common " birth control glasses " ( BCGs ) and other variants. At one time, they were officially designated as regulation prescription glasses ( RPGs ).
Sunglasses worn by an ocean kayaker A Sherpa mountain guide on an expedition to K2 (8.611 m), wearing anatomically shaped mountaineering sunglasses. Like corrective glasses, sunglasses have to meet special requirements when worn for sports. They need shatterproof and impact-resistant lenses; a strap or other fixing is typically used to keep ...
Safilo Group S.p.A. (acronym of Società Azionaria Fabbrica Italiana Lavorazione Occhiali) is an Italian company that designs, produces, and distributes prescription frames, sunglasses, sports eyewear, ski goggles and helmets, and cycling helmets under its own five house brands and 32 licensed brands, including Smith Optics since 1996.
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