How to Measure Pupillary Distance

How to Measure Pupillary Distance

Pupillary Distance, or PD, is the distance between the centers of your eyes. The pupillary distance is an important piece of information when buying glasses; it ensures the optical center of the prescription is aligned directly in front of your pupils, helping your prescription be as effective as possible. So grab a ruler and check out this video on how to measure your pupillary distance at home!