What does "ou" indicate when prescribing medication?

The abbreviation "ou" stands for "oculus uterque," which is Latin for "both eyes." In the context of prescribing medication, particularly eye drops or ointments, it indicates that the medication should be applied to both eyes. This is important to ensure that both eyes receive the necessary treatment, especially in cases of conditions that affect both eyes or when a preventive measure is required. Understanding common medical abbreviations is crucial for accurate medication administration and to prevent any confusion regarding which eye a medication is intended for.