How To Measure Your Pupil Distance:
How To Measure Your Pupil Distance:
What is your pupillary distance - P.D?
Your pupillary distance, known as P.D, is the distance between the centre of one pupil to the centre of the other (see below).
This is used so that the laboratory can place the optical centre of your lenses in the correct position for your glasses helping you to achieve optimal clarity in your lenses and to assist in ordering your new prescription glasses online with confidence.
Your P.D is unlikely to be written on your prescription so when getting your eyes tested, we recommend that you ask your optician to measure and write it on your prescription.
If it is not included on your prescription, then you can measure it yourself quite easily, a number of different ways.
How Do I Measure My PD at Home?
There 2 ways you can measure your PD at home:
- The traditional way - with a ruler
- The digital way - online using 1 of the many simple & convenient pupil distance measuring apps that are available
Measure your pd online with an app:
The modern apps are excellent and we recommend using 1 of them and getting a very accurate number, very quickly, here are some of them:
iPhone Apps:
Opthy:
Allows you to to confidently discover your PD and to be able to order prescription glasses online, knowing that you obtained personalised measurements.
https://apps.apple.com/us/app/opthy/id1624663408
EyeMeasure:
Enables you to measure your pupillary distance & segment height instantly at near and far distances.
https://apps.apple.com/us/app/eyemeasure/id1417435049
Android Apps:
GlassesOn:
Get an accurate PD in seconds with this simple to use app
https://play.google.com/store/apps/details?id=com.sixoversix.copyglass&hl=en_GB&gl=US&pli=1
Measure your PD using a ruler:
This can be done in 2 different ways:
- Measure (in mm) from the centre of one pupil to the centre of the other (see image below)
- Measure (in mm) from the outside of one pupil to the outside of the other pupil (see image below)
We recommend asking a friend to do this for you, although it is possible to do it in a mirror.
Once that’s all done and you have your perfect pupil distance, you’ll be able to pick out your next pair of frames, choose your lenses, add your pd and all your prescription details and receive the perfect pair of glasses – all from the comfort of your own home.
