How To Measure Your Pupil Distance

Your pupil distance is exactly what it sounds like; it’s the measurement (in millimetres) between your pupils.

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

How do I measure my pupil distance?

The easiest and most accurate way to measure your pupil distance is by asking your optician during an eye test.

Alternatively, you can measure the distance yourself using a mirror and a ruler. If you're struggling, ask a friend to help measure it for you.

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


Pupil Distance Image


  • Measure (in mm) from the centre of one pupil to the centre of the other.
  • 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 for each eye), when ordering reading or near glasses.

Visit the next chapter by clicking the link below: 

Knowing Your Frame Measurements >>