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.

We can use an average PD if you have not had one provided with your prescription. Where we do recommend you supplying a PD measurement is when ordering varifocal lenses or have a strong prescription. If you are in any doubt please use our chat service and speak to a member of staff.*

The average adult’s PD is between 54-74 mm

If you haven't been given you PD from your opticians, you can measure it by yourself or with the help of a friend, as demonstrated in this quick step-by-step guide below.

DUAL PD, or monocular PD, consists of two numbers and is the distance between the centers of each pupil to the bridge of the nose.

Example: A dual PD is usually written in the following notation: 30/32.