The abbreviations OD and OS that may be included with corrective eyewear prescriptions stand for “oculus dexter” and “oculus sinister.” In other words, this is Latin for “right eye ...

Ocular exam revealed best-corrected visual acuity of 20/200 OD and 20/40 OS. There was no improvement on pinhole testing in either eye. Pupils were equal with no relative afferent pupillary defect.

For this and any eye concerns, you should visit your eye doctor for an exam, but if you have a basic ... for O.D. or O.S. O.D. stands for oculus dexter, which is your right eye.