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Do you need an accurate Pupil Distance (PD) Measurement?

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Should I supply my actual Pupil Distance instead of using a UK average PD?

In simple terms YES, here’s why

A UK average PD is around 63mm, this is the distance from the centre of one pupil to the centre of the other.

But PD’s typically range from 50mm to 75mm, that’s a large area for error. If the PD is incorrect the wearer will be looking through unwanted prism and aberrations which results in blurred vision and dizziness.

So is a PD difficult to take?

In simple terms NO, if you have the right ruler which has a pre fitting position over your nose you can’t go far wrong.

It’s for this reason have taken the decision to make a ruler FREE forever prescription job we receive. The ruler will include instructions and be posted 1st class the same day you place your order.

If I have already measured my own PD or have had it measured elsewhere should I measure myself with the ruler?

In simple terms YES, why not it’s free and reduces room for errors, our ruler also measures each eye independently. This is more accurate and again it’s easy.

How do I get a ruler?

When you place an order select ‘send ruler’ from the PD selection box.

Can I order a ruler before placing an order?

Yes you can, a small fee of £5.00 will be charged but with every ruler we send a £5.00 extreme-eyewear voucher so if you order your prescription glasses / sunglasses from us you will get the cost of the ruler back.


Other companies do print out rulers, why doesn't extreme-eyewear?

Paper, or even thin card which some printers can print on bent extremely easy. When measuring your pupil distance if the paper bends even slightly your PD will be wrong. its as simply as that, so we decided our customers deserve better.

Our ruler also measures the right and left pupil distances independently, the most accurate way. Your eyesight is one of your most important sensory features so we want the best vision for every wearer.



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