Essilor International S.A.
Topcon Corporation
NIDEK CO. LTD.
INNOVA Medical Ophthalmics Inc.
Coburn Technologies Inc.
Huvitz Corp.
Mei Srl
Santinelli International
Shanghai Supore Instruments Co. Ltd.
Luneau Technology Group
Briot USA Inc.
Dia Optical Co. Ltd.
Visslo
Schneider GmbH & Co. KG
Nanjing Laite Optical Co. Ltd.