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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.
Ray-Ban, Oakley, ARNETTE and Vogue Eyewear are their outside premium brand offerings, while RFLKT is their in house premium brand. According to the company, 50 percent of its revenue came from repeat customers in 2013. [citation needed] Customers must have a valid prescription prior to purchasing prescription eyeglasses from Eyebuydirect.
Eyeglass prescription. 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.
The Ray-Ban Wayfarer is a (mostly) plastic-framed design for sunglasses produced by the Ray-Ban company. Introduced in 1952, the trapezoidal lenses are wider at the top than the bottom (inspired by the Browline eyeglasses popular at the time), and were famously worn by James Dean , Roy Orbison , Elvis Presley , Bob Marley , The Beatles and ...
Consequently, for external lens surfaces as diagrammed above, R 1 > 0 and R 2 < 0 indicate convex surfaces (used to converge light in a positive lens), while R 1 < 0 and R 2 > 0 indicate concave surfaces. The reciprocal of the radius of curvature is called the curvature. A flat surface has zero curvature, and its radius of curvature is infinite.
Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.
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