For more information on PD, See our “What is Pupillary Distance (PD)?” page.

When you are ready to measure your PD (pupillary distance), download our special ruler here:

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How to Measure Your PD with a Friend

Measuring with a friend is the preferred method of measuring your pupillary distance at home. For this tutorial, you will need our special ruler. If a friend is not available, scroll further for our tutorial on how to measure on your own.

1  Print our tip sheet, which includes a special ruler to measure your PD. Ensure it’s scaled properly by comparing your Driver’s License against the key.

2  Have your friend stand 8 inches away or more. Hold the center of the special ruler straight over the bridge of your nose.

3  To measure your right eye, stare straight ahead (as if you’re looking into the distance) and close your left eye. Your friend should close their right eye and note the mm mark on the ruler directly above the center of your right pupil.

4  To measure your left eye, stare straight ahead (as if you’re looking into the distance) and close your right eye. Your friend should then close their left eye and note the mm mark on the ruler directly above the center of your left pupil.

5  Repeat this process at least three times to ensure you have an accurate measurement.

How to Measure Your PD on Your Own

To measure on your own, you will need a mirror and our special ruler. Measuring with a friend is the preferred method. If you have a friend available, scroll up for our how to measure with a friend tutorial.

1  Print our tip sheet, which includes a special ruler to measure your PD. Ensure it’s scaled properly by comparing your Driver’s License against the key.

2  Stand in front of a mirror (8 inches away or more). Hold the center of the special ruler straight over the bridge of your nose.

3  To measure your right eye, stare straight ahead and close your left eye and note the mm mark on the ruler directly above the center of your right pupil.

4  To measure your left eye, stare straight ahead and close your right eye and note the mm mark on the ruler directly above the center of your left pupil.

5  Repeat this process at least three times to ensure you have an accurate measurement.

Congratulations! Now that you have accurately measured your pupillary distance, you’re ready to order prescription glasses online.