Pair of Orma Thin Kromos Glass Spectacle Lenses in Envelopes
 Catalogue Number: 3934 Pair of Orma Thin Kromos Glass Spectacle Lenses in Envelopes Category: Spectacles and lenses Sub-Category: Spectacle lenses Corporation: Essilor Year Of Publication/Manufacture: 2000s Time Period: 21st C Publisher/Manufacturer: Essilor Description Of Item: Two envelopes 82 m x 82 mm x10 mm with a blue face with a starry sky, part of a lens and planet imprinted in black and aqua over a white background with an Essilor logo. A white label is affixed bearing ORMA THIN KROMOS, a bar code, 70 and lens parameters S -2.50 C +0.75 S -1.75 C -0.75. The back of the envelope is imprinted in black and aqua with an Essilor logo. Historical Significance: Lenses were part of old stock kept at the ACO dispensing laboratory. Essilor was formed in 1972 as a merger between Essel and Silor, both French companies. Essel began in Paris in 1849 as a group of spectacle assembly workshops. It added frame manufacture to its lens making activities inventing the Nylor method of lens retention. It invented the first progressive lens Varilux in 1959. Silor another optical group invented a lightweight lens in 1959, Orma 1000. Essilor merged with LuxOttica in 2018. How Acquired: Donated by ACO Optical Dispensing Laboratory via David Leeming Date Acquired: 08/2019 Condition: Good Location: Archive office. East wall shelves unit 3. Drawer 8 |