Essilor International SA designs, manufactures, and sells ophthalmic lenses and ophthalmic optical instruments around the globe. It offers products for correcting myopia, hyperopia, astigmatism, and presbyopia. The company operates through three segments: Lenses and Optical Instruments, Equipment, and Sunglasses & Readers. It has a network of 490 prescription laboratories, and edging and local distribution centers. Essilor was founded in 1849 and is based in Charenton-le-Pont, France.