Search Results

2/11/2019

What is Pupillary Distance (PD) and How to Measure It At Home?

Health

Ever wonder what you’re supposed to put in the “PD” box when you’re entering your prescription online? Pupillary distance (PD) is the distance between the centers of the pupils of your eyes, and it’s used to determine the proper lens shape and alignment of your prescription to your line of vision.