How to measure your PD

Pupillary Distance or (PD) is simply the distance between your pupils. It's an important measurement because it helps make sure that you are looking through the ideal spot in your lenses. The good news is, it's really easy to measure:

1. Stand 20cm / 8 inches away from a mirror.
2. Hold a ruler against your brow.
3. Close your right eye then align the ruler's 0 mm with the center of your left pupil.
4. Look straight then close your left eye and open your right eye.
5. The mm line that lines up to the center of your right pupil is your PD.