?- Alcon Inc.
- Alltion (Wuzhou) Co. Ltd.
- ARI Medical Technology Co. Ltd.
- Metall Zug Group (Haag-Streit)
- Danaher Corporation (Leica Microsystems)
- Olympus Corporation
- Seiler Instrument Inc.
- Takagi Seiko Co. Ltd
- Topcon Corporation
- Carl Zeiss AG