Asking a Friend to help you using a ruler
This is the easiest method for measuring you PD. Please follow the guide below:
With your friend sitting opposite you at the same height, ask them to place a ruler across your forehead just above your eyes with the millimetre side facing upwards.
Ask your friend to close their right eye and you then look directly into their left eye. Ask your friend to slide the ruler so that the zero value is in the centre of your right pupil and to keep the ruler very steady across your forehead.
Ask your friend to close their left eye and for you to look directly into their right eye. Your friend will then read off the measurement to the centre of your left pupil.
That is all there is to it. Please see the diagram above to help you further.
Asking a Friend to help you using your current glasses
Put your glasses on so that they are comfortable and steady. Ask your friend to stand opposite you and mark on your lenses the position of your pupils with a non-permanent marker.
You will now have two lines directly in front of you whilst wearing your spectacles. Take off your glasses and measure the distance between the two markings. If you have a reading of 6cm then type in our prescription page a PD distance of 60. If the measurement is 6.4cm then your PD will be 64.
More ways to measure
Simply Use a Mirror
You can do it yourself simply by looking in the mirror. If you need your glasses on to do this, you can draw dots on the lenses where your pupils are (using a magic marker or highlighter); then take the glasses off and measure the distance between them.
Ask Your Optometrist or local opticians
You can also get this information from your Optometrist or from a licensed optician.
If you have two PD numbers on your prescription, you have either been given both the Distance/Reading or Right Eye/Left Eye.
Here’s what you do:
Two same number: (Ex. 30/30) Add them together (Ex. 60 is your PD).
Two low numbers*: (ex. 30/31) The first number is for the right eye (O.D.) and the second number is for the left eye (O.S.). *Place it in the "Customer notes" section of the order form.
Two high numbers: (Ex. 62/59) First number is your Distance PD and the second is your Near PD (for reading-only glasses).
As a Guideline: Most adults' PD's are between 55-65. Most kids' PD's are between 42-54.
How to Measure your Pupillary Distance(PD)?
Pupillary Distance (PD)
Your Pupillary Distance, sometimes referred to as ‘PD’ is the horizontal distance between the centres of your pupils in millimetres(mm). It is needed to ensure the centre of each lens is aligned with the centre of your pupils.
Note: This is generally not included on your prescription. Either
Ask your optician for your PD measurement. It is usually written as one measurement such as 60 (60mm) but can also be shown as R 29 L 31. When written like this it is the individual distance from you right and left pupils to the centre of your nose.
Measure the distance yourself using a mirror and a ruler as explained below.
Use an average PD measurement which is about 62mm for women and 64mm for men. This will not be a problem for most people who either are the average or have weak prescriptions (-2 to +2 spheres). For people with stronger prescriptions it would be better to measure your PD. Though the spectacles will not harm the eyes, they could cause discomfort and eye strain. Alternatively,
Send us an old pair of your glasses and we will match the centres to these. We will return the glasses with your new pair. Please include a note with your name, telephone number and your reference number that will be provided on the completion of your purchase.