Measure your pupillary distance

How to measure your pupillary distance at home.

We recommend our customers to ask their optician to include the pupillary distance (PD) in the prescription when they receive it, but sometimes this is forgotten. Follow the visual guide below to learn how to measure your PD at home, either by yourself or with the help of a friend.

What is PD (pupillary distance) and why is it important?

The measured distance between the centres of your pupils is called pupillary distance (or PD). This measurement is used to determine where the optical centre of the lenses should be positioned.

Every pair of prescription glasses has an optical centre, which means where on the lenses you look through them. We use this to ensure you get the best possible experience with YouZee Clip-Ins.

The average PD for an adult is between 54-74 mm, while the average PD for a child is 43-58 mm.

You have 2 options.

Measure yourself with a millimetre ruler. Follow the instructions on this page.
Send us a photo. Don't want to measure yourself? Follow this guide.

GUIDE

HOW TO MEASURE YOUR PUPILLARY DISTANCE YOURSELF

Stand 20 centimetres (8 inches) from the mirror
Hold the millimetre ruler against your eyebrow
Align the ruler's 0 mm mark with the centre of your left pupil, while keeping your right eye closed.
Look straight ahead, close your left eye and open your right eye.
The millimetre line that aligns with the centre of your right eye is your pupillary distance.

You can always have a friend or family member help you measure your pupillary distance and if you do, keep these tips in mind:

Make sure they are outside your field of vision, you can have them sit down or crouch
Don't move your eyes and try to be as still as possible.
Choose a spot approximately 3-6 metres away above their head and stare at it.
Don't look at the person who is measuring.

VISUAL GUIDE

HOW TO MEASURE YOUR PUPILLARY DISTANCE YOURSELF

STAND 20 CM FROM THE MIRROR

Position yourself 20 cm from the mirror and face it directly. If you have a friend helping you they should also stand at this distance.

Position the ruler

Hold the millimetre ruler against your eyebrow. If a friend is helping you measure, you can ask them to place the ruler against your eyebrow.

Align the ruler

Align the ruler's 0 mm mark with the centre of your left pupil while keeping your right eye closed. If you have a friend helping you, make sure they are outside your field of vision and have them crouch or sit down while you choose a spot to look at in the distance.