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Pit Viper is an American company based in South Salt Lake, Utah. The company designs, develops and manufactures sports performance equipment and lifestyle pieces including sunglasses , safety glasses, eyeglasses , sports visors, ski/snowboard goggles utilizing a 1980s, 1990s and early 2000s aesthetic combined with an irreverent, absurdist ...
The APEL was created in 2006 because statistics showed that about 10% of battlefield injuries at that time included eye injuries. [1] The APEL is updated periodically; it usually contains more than a dozen types of non-prescription and prescription spectacles and goggles for different duty situations and soldier preferences.
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.
Goggles, or safety glasses, are forms of protective eyewear that usually enclose or protect the area surrounding the eye in order to prevent particulates, water or chemicals from striking the eyes. They are used in chemistry laboratories and in woodworking. They are often used in snow sports as well, and in the sport of swimming.
[49] [48] Sunglasses make up 42% of the global eyewear market as of 2020. They protect the eyes from sun damage and conjunctivitis, but are also sold as fashion accessories, with many consumers opting to have a number of sunglasses for different occasions. [48] EssilorLuxottica controls a dominant portion of the eyewear retail market.
The AWP is normally chambered for 7.62×51mm NATO/.308 Winchester or .243 Winchester ammunition, though it can be chambered for other cartridges. The AWP is distinct from the Accuracy International AW AE, which also has a black finish but is a cheaper non-military version of the AW series. [21]
Pinhole glasses, also known as stenopeic glasses, are eyeglasses with a series of pinhole-sized perforations filling an opaque sheet of plastic in place of each lens. Similar to the workings of a pinhole camera , each perforation allows only a very narrow beam of light to enter the eye which reduces the size of the circle of confusion on the ...
Using a phoropter to determine a prescription for eyeglasses. An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist, that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispense corrective lenses appropriate for a patient.
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First great made-on-the-internet brand. - Fast Company