OD means "right eye." It is an abbreviation for the Latin term "oculus dexter," used in eye prescriptions to refer specifically to the right eye.

Here is a more detailed explanation:

• OD stands for "oculus dexter," Latin for "right eye."
• This abbreviation appears in eyeglass or contact lens prescriptions to indicate values related to the right eye.
• OS (oculus sinister) refers to the left eye, and OU (oculus uterque) refers to both eyes.
• Prescription details under OD correspond to the corrective lens needed for the right eye, such as for nearsightedness, farsightedness, or astigmatism.

This is the standard abbreviation used worldwide in optometry and ophthalmology to denote the right eye in medical records and prescriptions.