How To Measure Your Pupil Distance

Your pupil distance is exactly what it sounds like…it’s the distance between your pupils in mm.

It’s important to know this because it allows us to make your glasses with the lenses in the correct position.

How to get it:

Firstly…the easiest and most accurate way to get your pupil distance is to ask your optician for it when having an eye test.

Secondly, you can simply measure the distance yourself using a mirror and a ruler, or ask a friend to help and measure it for you.

It can be done using a ruler in two different ways.


Pupil Distance Image


  1. Measure (in mm) from the centre of one pupil to the centre of the other.
  2. Measure (in mm) from the outside of one pupil to the outside of the other pupil.

If you cannot measure your P.D then use a standard measurement of 60mm for women, and 64mm for men for your distance glasses.

These standard measurements are often used by ophthalmic opticians when your P.D cannot be obtained, and will always be suitable to allow us to make your glasses.

When focusing close up such as when reading, your pupils come inwards, therefore reduce your P.D number by 4 mm, (2 mm each eye), when ordering reading or near glasses

Visit the next chapter by clicking the link below: 

Knowing Your Frame Measurements >>