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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.
Oakley, Inc. is an American company headquartered in Foothill Ranch, California, which is an autonomous subsidiary of Luxottica.The company designs, develops and manufactures sports performance equipment and lifestyle pieces including sunglasses, safety glasses, eyeglasses, sports visors, ski/snowboard goggles, watches, apparel, backpacks, shoes, optical frames, and other accessories.
Eyebuydirect is an online-only retailer and designs and custom-makes most of its glasses in-house. [13] [19] They carry primarily affordable eyeglasses, but also offer three premium brands. [13] [20] Ray-Ban, Oakley, ARNETTE and Vogue Eyewear are their outside premium brand offerings, while RFLKT is their in house premium brand. According to ...
Impact-resistant lenses were added in 1938. [8] The sunglasses were redesigned with a metal frame the following year and patented as the Ray-Ban Aviator. [6] According to the BBC, the glasses used "Kalichrome lenses designed to sharpen details and minimise haze by filtering out blue light, making them ideal for misty conditions." [6]
A prescription of −1.00 +0.25 × 180 describes a lens that has a horizontal power of −1.00 D and a vertical power of −0.75 D. Only ophthalmologists write prescriptions in + cylinder. An optometrist would write a prescription in - (minus) cylinder. All spectacle and contact lenses would be made in minus cylinder.
Price on eBay: $400 MacBeth-Evans Petalware had a graceful, flower-like design that came in a variety of colors. Produced between 1930 and 1940, this Depression glass pattern features delicate ...
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