PD or Pupillary Distance is the distance in between the center of one pupil to the center of the other pupil. The PD is measured in millimeters (mm) and can also be written in this form: 35/34 ( Normally done if one eye is a little further away than the other from the center of the nose ).

How to Obtain Your Pupillary Distance.

Ask a friend to help you.




You need to have a friend hold a ruler across the bridge of your nose upside down ( so you can read the millimeter measurement ) It is much easier if you have someone about the same height as you. The measurer will hold the ruler in their left hand, close their left eye. They would then open their right eye and line the beginning of the ruler with the center of the left pupil. Then close your right eye and open the left eye and read the center of the right eye without moving the ruler.

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