Prescription Service FAQ: What is my PD?
What is my PD and why do I need it?
PD stands for pupillary distance, which is the distance between the centers of each eye. While this measurement is not strictly necessary, the docs highly recommend you provide it to make sure that your glasses come out right. Your local optician/optometrist can quickly get that number for you (they may even have it on file for you if you visited them in the past), or you can take that measurement yourself at home. If your prescription does not include your Pupillary Distance, just call the last place that performed your eye exam to have them measure, or you can do it easily at home by following the directions in the image below! please write this number on your prescription, add it to your order notes, or email it to us after purchase to get a more precise fit!