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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.
Bernard Maitenaz, patented Varilux in 1953, and the product was introduced in 1959 by Société des Lunetiers (now Essilor). The first Varilux lenses' surface structure was however still close to a bifocal lens, with an upper, aberration-free half of the surface for far vision and a rather large "segment" for clear near vision.
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 ...
Louisa Maria was born in 1692, at Saint-Germain-en-Laye in France, four years after her father had fled England never to return. [3] Owing to the huge controversy which had surrounded the birth of her brother, James Francis Edward, with accusations of the substitution of another baby in a warming pan following a still-birth, James II had sent letters inviting not only his daughter, Queen Mary ...
A group of ancient three-eyed reptiles, from a species that dates back before the dinosaurs, have been welcomed at a zoo. The reptiles, called tuataras, have moved into a new habitat at Chester ...
Sadly, the Alpine Mastiff's numbers dwindled due to crossbreeding with other large breeds, such as the Saint Bernard and the English Mastiff. By the late 19th century, the purebred Alpine Mastiff ...
Former Lancaster County Councilman Allen Blackmon, state Rep. Matt Leber and Carlisle Kennedy, the three men who defeated the GOP “sister senators,” all describe themselves as anti-abortion ...
Bernard of Saxe-Weimar Alexander Leslie John George I George William. William V of Hesse-Kassel: Albrecht von Wallenstein † Count Tilly † Ferdinand II Ferdinand III Gottfried Pappenheim † Cardinal-Infante Ferdinand Count Leganés. Maximilian I of Bavaria: Strength; 1630: 70,600 13,000 men landing in Germany [1] [2] 10,000 infantry [1 ...