- OASIS Medical, Inc. Booth Number: B429
-
- Ocular Instruments, Inc. Booth Number: B419
-
- Ocular Therapeutix, Inc. Booth Number: B326
-
- Oculentis GmbH Booth Number: B112
-
- OCULUS Optikgeräte GmbH Booth Number: B614
-
- OCuSOFT, Inc. Booth Number: B446
-
- Oertli Instrumente AG Booth Number: B412
-
- OIS Europe Booth Number: B737
-
- Omni Lens PVT. Ltd. Booth Number: B731
-
- Ophmed Co., Ltd. Booth Number: B626
-
- Ophtec BV Booth Number: B313
-
- OPKO Instrumentation Booth Number: B717
-
- Optico Ltd. Booth Number: B426
-
- Optikon 2000 S.P.A. Booth Number: B217
-
- OPTIMAL Saglik Urunleri San. ve Dis. Tic. Ltd. Sti. Booth Number: B430
-
- Optimed Booth Number: B741
-
- OptiMedica Booth Number: B515
-
- Optitech Europe BVBA Booth Number: B730A
-
- Optos GmbH Booth Number: B220
-
- Optotek d.o.o. Booth Number: B720
-
- Optovue, Inc. Booth Number: B511
-
- Orbis and Oxfam Booth Number: F100
-