Pupillary distance (or PD) refers to the distance between your two pupils. It’s necessary to center a prescription in your frames for clear, accurate vision. You can use our online tool here to measure your PD using just a webcam or smartphone camera. Review the steps below before beginning.

1. Take off glasses. Make sure the image is well-lit.
It also helps if the background is clean.

2. Adjust your screen, look at the camera.
The angle of the photo is straight-on.

3. Place any card with a magnetic strip under your nose, then take the photo.
The magnetic strip forms a straight “card moustache”