What is a PD
Your PD or pupillary distance is the distance in millimeters between the centre of one pupil to the centre of the other. This measurement allows us to accurately manufacture your glasses, ensuring the optical centres align with where you are looking through your new lenses. It is often included in your prescription.
If you do not have a PD measurement as part of your prescription, you can measure it yourself. All you need is a ruler and mirror.
If you have two PD numbers
If your prescription has 2 PD measurements (one for the right eye and one for the left), add the numbers together to enter them in your prescription order. For example, if your prescription looks like this, add the right and left PD values together (30.5 + 29.5) and enter 60 in the PD dropdown.
How to Measure your PD
Stand approximately an arm's-length away from a mirror with a ruler. The ruler must be able to measure the distance between your pupils in millimeters (mm). Looking straight ahead, measure the distance between the centre of one pupil and the centre of the other, in mm. The average PD is 63 mm, but varies by individual.