Pupillary Distance (PD)

 
  What is Pupillary Distance or PD?
  You might have guessed, it's the distance between the center of the left and right pupil, in millimeter (mm).
 

  Measure your Pupillary Distance, D.I.Y.
  Get help from a friend. Have your friend face you at arm's length. Have a millimeter ruler ready.
  Have your friend place the ruler between your pupils and measure. IMPORTANT: leave no space between the ruler and your face when taking measurement.
  IMPORTANT: Look straight and level at your friend's face while measurement is being taken.
  If all your friends are on vacation, you have to truly D.I.Y. by putting the ruler on your own face and looking into a mirror at arm's length.
  If you have your Pupillary Distance in different formats
  e.g. "64/61" - PD for "distance/near". 64mm when looking far, 61mm when reading a book. How to enter into our order form - If your eye doctor or optometrist have your PD in this format, choose 64 in the PD pull down menu of the order form, then specify "PD=64/61" in the special instruction box when you check out.  
  e.g. "31-33" - 31mm form center right pupil to middle of face, 33mm from center left pupil to middle of face.  How to enter into our order form - If your eye doctor or optometrist have your PD in this format, choose 64 (31+33) in the PD pull down menu of the order form, then specify "PD=31-33" in the special instruction box when you check out. 
 
Disclaimer
  This page is made in a simplified manner to help customers filling out our online order form. If you need information for serious purpose, please refer to authoritative sources.