Two Ways to Measure PD
Use Our Ruler to Size It Up
Pupillary distance (PD) is the distance between the center of the pupils in both eyes, measured in millimeters. The PD should line up with the center of the lenses to provide the best visual acuity. Download our PD ruler and print it full size to measure your kiddo.
OMG! This is Too Hard!
Okay, Mama bear. Here's a tip. Many optical professionals will measure your kiddo's PD either free or for a nominal charge. Or try an app like Eye Measure or GlassifyMe with older kids.