What does the abbreviation OS refer to?

The abbreviation OS stands for "oculus sinister," which is Latin for "left eye." In veterinary medicine, as well as in human medicine, ocular abbreviations are commonly used to specify the eye being referenced in a treatment plan or prescription. In this context, when a medication or treatment is prescribed for the left eye, it is denoted by OS to avoid any confusion regarding which eye is being treated.

Understanding such abbreviations is crucial for veterinary medication clerks, as precise communication is essential for the safe administration of medications and ensuring appropriate care for patients. This knowledge also helps in interpreting written directives from veterinarians accurately, ensuring that no mistakes are made in treatment protocols.