How To Measure Your Pupillary Distance
How To Measure Your PD
What is Pupillary Distance (PD)?
Pupillary Distance (PD) is the distance in millimeters between the centers of your pupils. It's a critical measurement used to align the optical center of each lens with your line of sight—ensuring clear, comfortable vision when wearing your glasses.
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Printable PD Ruler Print this page on A4 paper at 100% scale (do not resize). Use the PD ruler located at the bottom of the page. For the most accurate results, we recommend using a physical PD ruler or consulting your eye care professional. |
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Download Zeelool's PD ruler Note: Please Printed on A4. |
How to Measure Your PD at Home
The average adult PD ranges from 54mm to 78mm. Your actual measurement may vary slightly. For best accuracy, measure 2–3 times and use the average.
Step 1
Stand approximately 8 inches (20 cm) away from a mirror, or ask a friend to help you at arm's length. Repeat the measurement 2–3 times for accuracy.
