Measure your pupillary distance (PD)
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 photo.
Step 1
Take a frontal face photo holding a credit card-sized plastic card under your nose.
Step 2
Upload the photo, zoom in and align the sight markers directly with your pupils.
Step 3
Zoom out and drag to adjust the card placement overlay, then read your calculated PD value.