OD vs. OS Demystified Now that we’ve clarified which eye is OD and which is OS, and introduced you to other commonly used eye abbreviations and terms, we hope you can decode your prescription with ease. All that’s left now is to find your perfect pair of eyeglasses or contacts and ...
How to Read Your Eyeglass Prescription When you look at your prescription for eyeglasses, you will see numbers listed under the headings of OS and OD. They are Latin abbreviations: OS (oculus sinister) means the left eye and OD (oculus dexter) means the right eye. Occasionally, you will s...