Find your Pupillary Distance (PD)
Your Pupillary Distance (PD) is the distance between the centres of your pupils, measured in millimetres. Knowing this number means we can make sure you’re always looking through the correct part of the lens — we can’t make your glasses until we’ve got your unique PD.
How to get yours?
If visiting a store, our retail assistants will measure your PD in just a few seconds. But if you’re buying glasses online and don’t already know your PD, see the steps below.
Step 1
Order your new glasses on our website and leave the pupillary distance (PD) section blank. After you've completed your order, we'll email you a link to our online measurement tool.
Step 2
Once you receive the email, open the link and get your laptop or phone camera ready, along with a card that has a magnetic strip.
Step 3
Complete the simple instructions, and our tool will automatically measure and add your PD to your order. We'll then immediately begin crafting your new glasses.
Why is it important to find your PD?
If your PD isn’t right, it can cause eye strain, fatigue, or simply not being able to see properly. The higher your prescription, the bigger the effect an incorrect PD can have.
Don’t forget: if something doesn’t feel right, you can always contact us for corrections.
Why is it important to find your PD?
If your PD isn’t right, it can cause eye strain, fatigue, or simply not being able to see properly. The higher your prescription, the bigger the effect an incorrect PD can have.
Don’t forget: if something doesn’t feel right, you can always contact us for corrections.
FAQs
If you need the help of our online PD tool, just leave the Pupillary Distance fields blank when entering your prescription during the checkout process. Then sit tight for our follow-up email.
Ordering your new glasses is easy and getting your pupillary distance (PD) is just as simple.
Step 1: Order your new glasses on our website. You can leave the PD section blank. Once we receive your order, we’ll email you a link to our online measurement tool.
Step 2: Follow the link and prepare your laptop or phone camera.
Step 3: Our tool will automatically measure and add your PD to your order so we can begin crafting your new glasses.
Here's a preview of the simple steps you'll follow to measure your PD:
1. Place your phone or computer on a steady surface in a well-lit room.
2. Open the link to our online measurement tool from our follow-up email.
3. Turn up the volume so you can hear the instructions.
4. Look directly into the camera, not at yourself—despite the temptation.
5. Heads-up: If you wear glasses, please take them off for the scan.
6. Grab your bank card (or anything with a magnetic strip). Light-colored cards work best.
7. Start the scan—and make sure you’ve allowed access to your camera.
8. Hold the bank card by its top corner and press it flat on your forehead. We might ask you to make small adjustments—just go with it.
9. Consider it done! The scan will get your PD, and we'll immediately add it to your order.
Whilst the distance between your pupils is one length, you’ll have to halve it to work out the PD for each eye, e.g. if your PD is 60mm, your left and right eyes will be 30mm each. If you can’t halve your PD to a round number, no problem - split them to the closest 0.5mm, e.g. if your PD is 60.5mm, fill in: right = 30mm, left = 30.5mm. We see this quite a bit so, don’t worry, we know how to deal with it.
The average PD is somewhere between 58-68mm. If yours falls outside this, or you have a prescription over +/-6 SPH, get in touch with us, and we’ll give you a helping hand. Visiting one of our stores? Easy, our retail assistants will measure your PD for you.
