Which abbreviation is used for the left ear?

The abbreviation used for the left ear is "AS," which stands for "auris sinistra." This is derived from Latin, where "auris" means ear and "sinistra" refers to the left side. In medical contexts, precise communication is essential, especially regarding medication administration or treatments related to the ears. Using the correct abbreviation ensures that healthcare providers convey accurate information about which ear is being referenced, thus minimizing the risk of errors in treatment.

In contrast, "OU" refers to both eyes (oculus uterque), "AD" signifies the right ear (auris dextra), and "AU" indicates both ears (auris utera). Understanding these abbreviations is crucial for effective communication in healthcare settings, particularly when dealing with medications or assessments that engage the auditory system.