P.D & Heights
Pupillary distance and heights are essential measurements needed for bifocal glazing .
Each bifocal lens will have a very specific ‘optical centre’, this point should be placed directly in front of the centre of each of your pupils. That way, your eyes are looking through the correct point of the lens for your distance vision the near area follow naturally from there.
We prefer to take this measurement from an existing pair of your bifocals. Our Optician has developed a tried and tested method to store and translate this to any other frame.
We don't ask for your p.d measurement when you order because we take all the measurements we need from your existing frames or digital photo.
For New Wearers please use our free App with the 'P.D Capture' button to take a head-shot selfie and email direct to us. We can scale this to original size and get the measurements we need very accurately. You can of course email us a head-shot digital photo of you wearing the frame you want us to reglaze. We can scale this and obtain the p.d and heights very accurately too.
If you have ordered bifocals with us before we will already have all the measurements we need on file!