What does OS indicate in term of eye prescriptions?

In the context of eye prescriptions, "OS" stands for "oculus sinister," which is Latin for "left eye." This terminology is used by eye care professionals to denote which eye is being referred to in a prescription for corrective lenses or other visual aids.

Understanding the acronyms used in eye prescriptions is essential for both healthcare providers and patients, as it helps prevent confusion regarding which eye needs specific treatment or correction. In contrast, "OD" refers to the right eye ("oculus dexter"), and "OU" refers to both eyes ("oculus uterque"). This precise language ensures clarity in communication about patients' visual needs.