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” an ...

On examination, her best-corrected visual acuity (BCVA) was 20/60 OD and 20/20 left eye (OS). A slit lamp examination revealed significant Meibomian gland dysfunction OU with frothing OD > OS ...