Opticians
can write prescriptions in many different ways but
essentially there are 3 main.
These are the sphere, the cylinder and the axis.
If you have an astigmatism then your prescription should
include all three numbers.
If you do not have astigmatism then your prescription
may only consist of one number, the sphere. This may
be followed by DS which means Dioptre sphere and does
not need to feature when you enter your details on
the site.
A typical prescription would look something like :
-1.00/+0.75 x165
the first number is the sphere , the second the cyl
and the third the axis.
Sometimes the spherical value of the
prescription is zero. Opticians may write this in the
following ways:
Plano
Pl
(infinite)
all of these mean the same and you should select either
the plano , infinty or 0.00 option on the prescription
page.
The reading addition is usually marked separately
as a single number and is usually the same for both
eyes. +2.50 would be a typical reading addition. We
need you to enter this if you would like reading spectacles
or bifocals.
Some opticians may write 2 complete prescriptions.
One for distance and another for reading. If this is
the case please enter you distance prescription using
the drop down boxes. Please then enter your reading
prescription in the area for extra information and
we will calculate it for you.
There is a possibility your prescription contains
a component called Prism. This may be denoted by a
number followed by a P and a small triangle and either
up,down,in or out.
If this features in your prescription please email
us the details and we will advise you of
cost etc.
Please do not just omit
this part of your prescription.
The pd measurement denotes where the optical centres
of the lenses will be placed. If this is marked on
your prescription please include it. If it is not marked
please leave the option set at the default.
If at any point you are unsure of your order please
contact us for advice. Unfortunately we cannot take
any responsibility for information that has been entered
incorrectly.