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After many years as rivals, Essel and Silor merged on 1 January 1972 to form Essilor, then the world's third-largest ophthalmic optical firm. [1] Its first year of existence was marked by the creation of Valoptec, a non-trading company composed of stockholder managers who held half the company's capital stock, and the purchase of Benoist-Bethiot, a French lens manufacturer specializing in ...
Varilux. Varilux is a brand name belonging to Essilor International, a producer of corrective lenses. The first version of the lens was invented by Bernard Maitenaz and released in 1959, and was the first modern progressive lens to correct presbyopia. The progressive lens is characterized by correcting near, intermediate and far vision.
EssilorLuxottica's former logo used from 2018 to 2022. EssilorLuxottica SA is an Italian-French vertically integrated multinational corporation based in Paris and founded on 1 October 2018 from the merger of the Italian Luxottica with the French Essilor. The eyewear -focused group designs, produces and markets ophthalmic lenses, optical ...
Leica Camera AG ( / ˈlaɪkə /) is a German company that manufactures cameras, optical lenses, photographic lenses, binoculars, and rifle scopes. The company was founded by Ernst Leitz in 1869 ( Ernst Leitz Wetzlar ), in Wetzlar, Germany. The name Leica is derived from the first three letters of the founder's surname (Leitz) and the first two ...
Hoya Corporation. Hoya Corporation (Hoya株式会社, Hōya Kabushiki-gaisha) is a Japanese company manufacturing optical products such as photomasks, photomask blanks and hard disk drive platters, contact lenses and eyeglass lenses for the health-care market, [4] medical photonics, [5] lasers, photographic filters, medical flexible endoscopy ...
Poly (allyl diglycol carbonate) (PADC) is a plastic commonly used in the manufacture of eyeglass lenses alongside the material PMMA ( polymethyl methacrylate ). The monomer is allyl diglycol carbonate (ADC). The term CR-39 technically refers to the ADC monomer, but is more commonly used to refer to the finished plastic.
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