What is PD value?

PD (Pupillary Distance) is the distance between your two pupils in millimeters. PD is very important for accurately fitting your lenses to achieve visual clarity. Average PD is about 62mm and most people fall within the 54mm to 74mm range.

How to measure your PD value?

We high recommend checking your PD value with your eyedoctor, especially for bifocal or progressive lenses. Also, you can measure the PD value by yourself according to the following steps:


❶ The average PD value is 62mm for women and 64mm for men. It can, however, range between 54mm and 74mm.

❷ For those requiring progresive lenses, we highly recommend you get this infomation from your eyedoctor to ensure the accuracy of your glasses.

❸ Your PD value may be written in three ways:

  • PD (OU), written as "61", means the Binocular PD which is for both eyes.
  • Sometimes your prescrition will provide two PD values and both are quite below the PD rane provided on the website, your prescription is likely for a sinale eve. For example, 30/31, which means OD/OS(Right Eye/Left Eye).
  • Sometimes PD is writen as "63/60" or they are labeled "Far" and "Near" For distance glasses, the PD value is "63" in this example. Foreading glasses, the PD value is "60" in the example. Always enter your "Far PD" for distance vision eyeglasses and enter your "Near PD" for your reading glasses only. For most people, the diference between Far PD and Near PD is about 2-3mm.

❹ Please do not try to measure the PD value from your current glasses since the PD value can't be measured from them. Please do not guess or assume you PD.