What does "OS" stand for in medical terminology?

In medical terminology, "OS" stands for "oculus sinister," which is Latin for "left eye." This term is commonly used in prescriptions and medical documentation to specify that a treatment or examination pertains to the left eye. Understanding these abbreviations is crucial in ensuring accurate communication in healthcare settings, especially concerning eye exams and treatments.

The other options refer to different abbreviations: "Right Eye" is denoted as "OD" (oculus dexter), and "Both Eyes" is abbreviated as "OU" (oculi unitas). Familiarity with these terms helps prevent any potential mix-ups, emphasizing the importance of precise terminology in patient care.