How to Measure Your Pupillary Distance (PD)

Why PD Matters

Pupillary Distance (PD) is the distance between your pupils, measured in millimeters. It ensures your lenses align with your eyes' optical centers for optimal clarity and comfort.

3 Easy Ways to Measure PD at Home

Method 1: Mirror & Ruler

1. Stand ~20cm from a mirror with a millimeter ruler held against your brow.
2. Close your right eye and align 0mm with the center of your left pupil.
3. Open your right eye, close your left, and read the measurement at your right pupil’s center.

Method 2: With a Friend

1. Look straight ahead at a distant object.
2. Ask a friend to measure between your pupils using a millimeter ruler.

Method 3: Use Our Printable Ruler

Download the Printable PD Ruler (PDF) and follow the included guide.