PD Measuring Guide


What is Pupillary Distance & How do I measure it?

PUPILLARY DISTANCE (PD) measures the distance between the centers of your pupils. This measurement is used to determine where you look through the lens of your glasses and should be as accurate as possible.

Most opticians will happily provide you with your pupillary distance when asked. However, If you haven't been given your PD, you can measure it by yourself or with the help of a friend as demonstrated in this quick step-by-step guide below.

   

My Pupillary Distance is written different!

Dual PD, or Monocular PD, consists of two numbers and are the distance between the centers of each pupil to the bridge of the nose. Dual or Mono PD is usually written in the following notation: 32/30. The first number is always the right eye (OD) measurement, and the second number is the left eye (OS). If you have this on your prescription just upload them as usual.


We always recommend supplying your accurate PD measurement when ordering prescription glasses, particularly for strong prescriptions and varifocals. We can however use an average PD if you have not had one provided with your prescription. If you are in any doubt please use our chat service and speak to a member of staff.*