What does 'O.U.' refer to when given instructions for an eye medication?

The abbreviation "O.U." is derived from the Latin term "oculus uterque," which translates to "both eyes." In the context of administering eye medication, it indicates that the medication should be applied to both eyes. This is particularly relevant when treating a condition that affects both eyes or when the practitioner wants to ensure that both eyes receive the treatment, even if only one eye is exhibiting symptoms.

Understanding medical abbreviations is crucial in the administration of medications to avoid errors and ensure proper treatment. Others terms such as "O.D." and "O.S." refer specifically to the right eye and left eye, respectively, which highlights the importance of knowing the differences in these abbreviations.