Tools · Optics
Measure your pupillary distance
Your PD is the distance between the centres of your pupils, in millimetres. Lens labs need it to place the optical centre of each lens correctly. Most adults sit between 58 and 68 mm.
Grab any bank or ID card (the standard 85.60 mm width is our ruler), hold your phone at arm's length, and follow the on-screen coach. Everything runs on your device — the photo never leaves your phone.
What you'll need
- · A bank or ID card (standard size)
- · Good, even lighting
- · Two minutes
Notes on accuracy
The tool averages up to three captures and corrects for the convergence that happens when you look close-up. For prescriptions above ±4.00 D, or for progressive/varifocal lenses, we still recommend an in-person measurement — small PD differences matter more at high powers.
The same tool is built into the lens-ordering step, so you don't need to save the value anywhere. It's here as a standalone in case you just need the number.