Which abbreviation indicates the left ear?

The abbreviation that indicates the left ear is "AS," which stands for "auris sinistra" in Latin. This term is commonly used in medical and audiological contexts to refer specifically to the left ear. Understanding these abbreviations is essential in healthcare settings, particularly for those involved in audiology, pharmacy, or any field where precise communication regarding anatomical locations is vital.

In contrast, "AD," which stands for "auris dextra," designates the right ear, while "OD," meaning "oculus dexter," refers to the right eye. Additionally, "OS," or "oculus sinister," is used for the left eye. Knowing these distinctions is crucial in ensuring accurate patient care and avoiding potential errors in administering treatments or medications meant for specific eyes or ears.