PD (Pupillary Distance)
Below are 4 methods for taking your own PD measurement
This is the distance between the centre of one
pupil to the centre of the other pupil measured
in millimeters. Usually written as one value (e.g.
67mm) but sometimes written as 32/35 if one eye
is slightly further away from the center of the
nose than the other.
Method 1:Using an old pair of specs with Lenses
removed.
(Only
use this method if you have an old pair of
specs you no longer use).
Method:
- Using a ruler, measure the overall width at
the widest point, usually the temple, of an old
pair of glasses, if available, in millimetres.
- For accuracy, lay your glasses on a table with
the arms open (shown in picture 2) and lay a
ruler across the arms with the millimetres nearest
the front of your glasses to measure.
- Remove the lenses from your old glasses by
unscrewing the screws that hold the frame together.
Once loose, the lenses should easily pop out.
DO NOT try to force them out with your thumbs
or fingers in case of injury.
- Take a photo of yourself wearing your glasses
with the lenses removed and email customerservices@glasses2you.co.uk the
resulting picture to us along with the frame's
width measurement. We will then work out your
PD for you and email you back.
NOTE: Please
make sure the photograph is taken in well lit conditions
and is a close up of your head and shoulders, as
shown in our example.
We would also appreciate
it if you could send us the photo at it's original
size i.e. NOT scaled down or cropped.
We can still make your glasses up using an average
Pupillary distance measurement based on your gender,
the size of the frames you have ordered and the
experience of our dispensing optician. In the
majority of cases this method works extremely
well but there will be certain customers who through
having very strong prescriptions or who significantly
differ from the average may encounter some problems.
In these cases the specs won't damage your eyes
but may well cause some discomfort. If you know
that you have a particularly strong prescription
or you suspect that you may not fall close enough
to what is seen as average sizes we would recommend
that you do try one of the methods
outlined on this page to obtain your PD measurement.
Method 2: Ask your partner or friend to help
you.
Make sure your friend is sat at roughly the same
height as you are and ask them to place a ruler
across the bridge of your nose upside down so
that the millimeter measurements are on the edge
of the ruler closest to your eyes. The measurer
holds the ruler in their left hand across the
bridge of your nose and closes their LEFT eye
to avoid any parallax error. With their RIGHT
eye open, they then first line up the ruler with
the center of your left pupil. Then without moving
the ruler they close their RIGHT eye and with
their LEFT eye open, read off the measurement
to the center of the RIGHT pupil. (See diagram
below). Best results are achieved if you fix your
gaze on the bridge of the nose of the person taking
the measurement. This point should ideally be
around 16 inches or 40 cm's away.
Method 3: Taking a measurement yourself
This is easily measured looking in a mirror and using a ruler!
Please follow these steps
- Stand in front of a mirror at a distance of
about 20cm (8 inches)
- Close your right eye
- Place your ruler flat against the mirror and
align it horizontally with the millimeter scale
pointing upwards
- Looking over the top of the ruler with your
left eye, align the zero mark of the ruler in
the center of your left pupil
- Now open your right eye and close your left
but keep your head still and the ruler in the
same position
- Read the millimeter measurement corresponding
to the center of your right pupil
- To be sure, you can repeat this process a few
times for consistency
Method 3: (With a helper)
Please follow these steps:
- Put your glasses on
- Ask your helper to stand in front of you and
mark a dot on your glasses directly above your
pupils left and right (Please
be sure to use a NON PERMANENT MARKER PEN)
- With a ruler, measure the distance between the
2 dots
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to generic face instructions 
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to own photo upload instructions
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to Varifocal instructions
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