When a medication is indicated as "OU," which part of the body is being referenced?

The abbreviation "OU" stands for "oculus uterque," which is a Latin term meaning "both eyes." Therefore, when a medication is indicated as "OU," it is referring to both eyes. This is particularly relevant in contexts such as ophthalmic medications, where instructions for administering drops or treatments to both eyes are necessary. Knowing this terminology is essential for correctly administering and understanding medication directions related to ocular health.

In contrast, the other options specifically refer to individual eyes or parts of the body that are not applicable in this context. For instance, "OS" refers to the left eye, while "OD" refers to the right eye. The term for ears is distinct and does not relate to this abbreviation at all. Thus, recognizing "OU" as indicating both eyes is crucial for proper medication administration and patient care.