Don’t know your PD? Click here
PD (Pupillary Distance) is the distance between the centers of your pupils, measured in millimeters (mm). It helps position your lenses correctly so you get clear, comfortable vision.
Single PD: One total number (example: 62 mm)
Dual PD: Separate measurements for each eye (example: 31 / 31)
You may also find your PD on a previous prescription or ask your optician.

Upgrade your look with the Oakley OX8156 Holbrook RX glasses in a classic square shape, a unisex design that suits work, travel and weekends. Shown in Matte Blue Steel, lens width 54 mm.
Oakley prescription frames are built for comfort through long, active days without giving up sporty good looks. It is prescription-ready, so it can be fitted with single-vision, progressive, blue-light or anti-glare lenses.
Tip: check the measurements printed on the inside arm of your current glasses to pick the closest size.
Shop the Oakley OX8156 online in the UK at SpecSmart and pair it with lenses made to your prescription.
Free delivery on all orders over £50.
Budget frames:
-Next day delivery
-Same day delivery option available for orders placed before 2pm (£35)
Designer frames:
Despatched in 5 to 10 working days depending on Prescription lenses order or availability.
Pick up from store option available. Processing times may vary depending on frames.
Please visit: Delivery Information page