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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]
Customers must have a valid prescription prior to purchasing prescription eyeglasses from Eyebuydirect. [9] The company sells multiple types of lenses, including bifocal, progressive, and Transitions lenses. [5] As of January 2020, Eyebuydirect has launched their 2-day delivery within the United States. [21]
Orma – Essilor's branding of the CR-39 lens material. Transitions – #1 selling brand of photochromic lenses. Formerly a joint venture between Essilor and PPG. Foster Grant – American brand selling non-prescription reading glasses; acquired from FGX in 2010. Bolon – Chinese ophthalmic frame brand. Molsion
A photochromic eyeglass lens, part of the lens darkened after exposure to sunlight while the other part remained covered. A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state.
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.
A photochromic eyeglass lens, after exposure to sunlight while part of the lens remained covered by paper. Photochromism is the reversible change of color upon exposure to light. It is a transformation of a chemical species ( photoswitch ) between two forms by the absorption of electromagnetic radiation ( photoisomerization ), where the two ...
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