Eye Prescription OS and OD, Left and Right eye

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What does OS and OD mean on an Eye Prescription?.

For an eyeglass prescription you might get numbers listed under the headings of OS and OD.


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Sometimes you might see the same numbers marked as Left eye and Right eye.

Latin translation:

  • OS (oculus sinister) translates to left eye
  • OD (oculus dextrus) translates to right eye.

Now you know: OS = Left eye, and OD = Right eye.


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