HOW TO MEASURE
PUPILLARY DISTANCE
(Or Where to Find it on Your Prescription)

What is PD? Why Do I Need It to Buy Glasses?

Your binocular pupillary distance, or PD, is the distance in millimeters between the center of each pupil. This measurement helps ensure the optical center of each lens matches up with your line of sight. Basically, it ensures your prescription is in the correct position for you to see as clearly as possible.

Where Can I Find My PD on My Prescription?

Your measurement should be located in the PD or Pupillary Distance section. It may also be featured in a separate section from the main prescription details. If you have two numbers, your doctor may have measured your dual PD.

Found your PD? Let's start shopping!

How Do I Provide It to Eyeconic?

If you use our online PD tool, we’ll prefill the value after you’ve completed your measurement.

If you got your PD from your doctor, you’ll input your PD during the checkout process.

This graphic shows where you’ll add your PD. Depending on which type you have, you can input your single or dual PD. If you have a dual PD, you’ll input your right eye PD first and then your left.