1. Carl Zeiss Inc.
2. Corning Inc.
3. Eastman Kodak Company
4. Essilor International S.A.
5. Fielmann AG
6. HOYA Corporation
7. JiangSu HongChen Optical Company
8. Leica Camera AG
9. Luxottica Group S.p.A.
10. Nikon Corporation
11. Opticolite India
12. Rodenstock GmBH
13. Seiko Group Corporation
14. Shanghai Conant Optics Company