| OAP | Office of Adolescent Pregnancy; old age pension, old age pensioner; ophthalmic artery pressure; oste... |
|---|---|
| ODSG | ophthalmic Doppler sonogram |
| OND | Ophthalmic Nursing Diploma; orbitonasal dislocation; other neurological disorders |
| OPN | ophthalmic nurse; osteopontin |
| Phaco | lens phacoemulsification [ophthalmic cataract surgery] |