Essilor International is a French-based international ophthalmic optics company that designs, manufactures and markets lenses to correct or protect eyesight.[1] Its headquarters is in Charenton-le-Pont (near Paris), France.

It is the world's largest manufacturer of ophthalmic lenses.[2] The firm is responsible for creating Varilux, the world's first progressive lens, which corrects presbyopia and allows clear vision in the wearer's near, intermediate and far vision.[1][3] The company formed from the merger of ophthalmic firms Essel and Silor in 1972.[4]

In January 2017 Essilor announced a merger with Italian eyewear giant Luxottica.[1] On 1 October 2018, the new holding company EssilorLuxottica was born, resulting in combined market capitalization of approximately €57 billion.[5]