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Transitions Optical is a U.S.-based company known for manufacturing photochromic lenses, which darken on exposure to specific types of light. The company was founded in 1990. [1] In 1991, Transitions Optical became the first company to commercialize and manufacture plastic photochromic lenses. [2]
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 ...
With the photochromic material dispersed in the glass substrate, the degree of darkening depends on the thickness of glass, which poses problems with variable-thickness lenses in prescription glasses. With plastic lenses, the material is typically embedded into the surface layer of the plastic in a uniform thickness of up to 150 μm.
Consumers can purchase frames, prescription eyeglasses, prescription or plain sunglasses, and contact lens refills. [9] After choosing the desired frames, the consumer goes through a three-step process to order lenses including choosing the lens type, lens thickness, and optional enhancement features. [11]
Solar shields Usually refers to models of sunglasses with large lenses. Stunna shades: Used as a slang term in the hyphy movement, usually referring to sunglasses with oversized lenses. Glecks is Scottish slang for glasses or sunglasses. Cooling glasses is a term used in Southern India (predominantly Kerala) and the Middle East for sunglasses.
An eyeglass prescription. Similar to medical prescriptions, eyeglass prescriptions are written on paper pads or included in a patient's electronic health record, and contain a number of different abbreviations and terms: DV is an abbreviation for distance vision. This specifies the part of the prescription designed primarily to improve far vision.
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