What does O.D. In this case, "qd" could easily be misinterpreted as "qid" (which means 4 times a day) or "od" (which means right eye). OD is an abbreviation for “oculus dexter” which is Latin for “right eye.” OS is an abbreviation for “oculus sinister” which is Latin for “left eye.” Your prescription might also have a … stand for in Prescription? Latin for "right eye." abbreviation related to Prescription: right eye Prescription O.D. 6. When you look at your prescription for eyeglasses, you will see numbers listed under the headings of OS and OD. OD (lens prescription): Abbreviation of "oculus dexter." And as mentioned above, there is e-prescribing (electronic prescribing) which adds another level of improvement to the clarity of prescribing medications. abbreviation meaning defined here. Top O.D. OS stands for "oculus sinister" which is Latin for left eye. (The words "dexterity" and "dextrous" derive from "dexter" since the right hand is usually more skillful than the left.) List of medical abbreviations: Latin abbreviations ... abbreviations in the context of drug …