WHY NEED A PD MEASURING RULER?

Pupillary Distance or PD is the distance between the center of our pupils in millimeters (mm). It is an important data when purchasing prescription glasses online, because it determines comfort and how well our glasses can fit. We can get the PD measurement on our prescription by our doctors, but if we cannot find it, or if we are going to by glasses online, we will need this PD ruler to measure the Pupillary Distance

WHY Ultrassist PD ruler?

Our PD ruler is made of high-quality transparent PVC, lightweight, flexible and easy to use. It has three different printed scales feature, so we can use it to measure either Single PD (or binocular PD) or Dual PD (or monocular PD) if needed. The PD ruler uses classic straight edge & nose bridge design, which can helps hold the PD ruler perfectly centered and stantionary stable, no worries of any accuracy problems. If you are looking for a low-cost suture practice kit with superior quality, you've got to try this one, you will be loving it.