Measure Your Pupillary Distance.
Pupillary Distance (PD) is the space between your pupils. Everyone’s eyes are spaced differently, so this measurement helps us make sure your prescription lenses work for you. Without it, your vision could turn out blurry.
We have two ways to calculate your PD. The first is our handy PD calculator, which uses your computer's webcam or smartphone camera and a card with a magnetic strip to calculate your PD. The second is a printable PD ruler you can use to measure your own PD.
Should you struggle with either, please don't hesitate to reach out to our customer service team via the chat box on our website or at 866-393-2627.