EyeQue PDCheck is the fastest, easiest, and most accurate way to measure your Pupillary Distance (PD) to order glasses or enjoy your favorite VR headset. PDCheck Frames are REQUIRED for app access. Purchase the $12.99 PDCheck frames on EyeQue.com! Measure your pupillary distance in three easy steps: Put on your PDCheck Frames Take a selfie (or ask a friend to take a picture of you) using the PDCheck App Adjust the markers to the center or your pupils AND frames Check out our award-winning at-home vision testing products at EyeQue.com.