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Learning the following terms will help you to understand your eyeglasses prescription and fill out the order form when purchasing your new glasses from Optical Lens Lab.
Your prescription will likely use abbreviations for Latin words to indicate left and right eyes. OD is short for oculus dexter, meaning right eye, and OS is short for oculus sinister, meaning left eye. Some eye doctors prefer to modernize their prescriptions, using the abbreviations RE and LE for right eye and left eye.
Pupillary distance, also called PD, is the distance between the centers of your pupils, measured in millimeters, and is used to align the optical center of your lenses to each pupil.
Your eye doctor might show your PD on your prescription as a single number, as two numbers (dual), or not indicate it at all. If your prescription doesn’t have the PD listed, learn how to measure your PD.