PD or Pupillary Distance is the distance between the center of your pupils in millimeters (mm). It is an important measurement when purchasing prescription glasses online. PD is sometimes written on your prescription by your doctor. However, if you cannot find it, there is no need to worry. Simply follow one of the two easy ways below to measure your PD quickly.
GlassifyMe's PD Meter App is available for both iOS and Android. All you need is a standard card with a magnetic strip (gift card, rewards cart, or points card) and you can measure your PD using the app in a few quick steps - without the need of a ruler. Our app uses advanced algorithms to ensure that your PD is calculated with precision.
You can also measure your PD by using our PD ruler available here. To measure your PD: