What does the abbreviation "OS" refer to in ophthalmic terms?

In ophthalmic terms, "OS" is derived from the Latin "oculus sinister," which translates to "left eye." This abbreviation is widely used in prescriptions and clinical documentation to specify the left eye when indicating the location for medication application, examination, or other visual assessments. Understanding such abbreviations is essential in ensuring accurate treatment and communication within the healthcare team.

The other terms in the options have their specific abbreviations: for instance, "OD" stands for "oculus dexter," meaning the right eye, and "OU" stands for "oculus uterque," which means both eyes. Knowing these distinctions aids healthcare professionals, especially pharmacy technicians, in correctly interpreting and conveying prescriptions for eye care.