In prescription terminology, what does 'as' stand for?

In prescription terminology, 'as' is an abbreviation that stands for "auris sinistra," which translates to "left ear" in Latin. This term is commonly used by healthcare providers when specifying medications or treatments that are to be administered in the left ear. Understanding these abbreviations is crucial for accurately interpreting prescriptions and ensuring patient safety, particularly in situations where precise administration site is critical.

The other options represent different abbreviations used in prescription language: "both eyes" is often abbreviated as "OU" (oculus uterque), "right eye" is abbreviated as "OD" (oculus dexter), and "left eye" is abbreviated as "OS" (oculus sinister). Each of these terms has its specific significance, and knowing the correct abbreviation for each anatomical location helps prevent potential errors in treatment.