Essilor International SA designs, manufactures and sale of ophthalmic lenses and ophthalmic optical instruments. It operates through three business segments: Lenses & Optical Instruments, Equipment, and Sunglasses and Readers. The Lenses & Optical Instruments business segment engages in the production, finishing, distribution and trading of lens and instruments. The Equipment business segment includes production, distribution and sale of high capacity equipment, such as digital surfacing machines and lens polishing machines, which are used in manufacturing plants and prescription laboratories for finishing operations on semi-finished lenses. The Sunglasses and Readers business segment engages in the production, distribution and sale of both non-prescription sunglasses and non-prescription reading glasses. The company was founded on October 6, 1971 and is headquartered in Charenton-le-Pont, France.