| Specsfinder
Ordering Guide |
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| "How
to find a frame for your" |
There are number of ways in which Specsfinder.co.uk can help you find
your exact size. Most of the new customers shopping for glasses are
often concerned about the size, as the size shown on screen can vary
with the actual dimensions of the frame.
Note,
we have provided all our users with a downloaded prescription
form (pdf file), that can be taken to your optician to
be filled in. You then can use the prescription form to
enter your prescription details.
(click DOWNLOAD
FORM, in the top right menu to download the pdf version
or to have a WORD version, to fill in electronically and
email us CLICK HERE).
All the main parts of our frames, are measured
as the below image shows. Measure your old frame using a normal
CM ruler (or DOWNLOAD
PRINTABLE RULER) as shown below and then
use SEARCH BY SIZE to find a frame
of your size. The most important measurement is Front Length
of the frame.
Note, all frames have "Dimension
Details", which state the different measurement shown
below.
1 inch = 25 mm
CLICK
HERE TO PRINT MEASURING RULER
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Frame Width
This measurement is the width of the frame, looking from the front
side. If you already use glasses you can compare the size of
your old frame with the frame you are interested in. You can
easily have a clear picture of the size. |
Lens
H (Height)
This is the actual Height of the lens fitted in the frame. This can be adjusted
in rimless frames but in half rims and full rims the lens size is always same.
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Lens W (Width)
This is the actual Length of the lens fitted in the frame. This can be adjusted
in rimless frames but in half rims and full rims the lens size is always
same.
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Bridge
/ Nose Width
This is the bridge size, connecting the two lenses. |
Arm Length
Frame arm length, measuring from the point
the arm joins the frame to the end of the arm sitting behind your
ear. |
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| "How
to read your prescription and enter it online" |
Simply transfer all the required details of your prescription, into our
online form.
Note,
we have provided all our users with a downloaded prescription
form, that can be taken to your optician to be filled
in. You then can use the prescription form to enter your
prescription details.
(click DOWNLOAD FORM, in the top right
menu to download it).
Your Prescription Should look like this:
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Copy this information (see above image) into our online prescription form
and it will look like this (below):
Note, you can leave the PD - PUPIL DISTANCE empty and
we will use the average PD value (63mm). But highly we recommend you use
the (DOWNLOAD
PRINTABLE RULER) or any normal ruler to measure the
PD (see more details below for explanation). |
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Different
types of prescription lenses available:
- Single
Vision Lenses have only one viewing area throughout
the lens. This corrected area can be for far distance,
near distance or reading.
Bifocal Lenses have two distinct
viewing areas within the same lens; the distance
area and the near area. The distance area in
bifocals is designed like a single vision lens,
while the near area contains the distance prescription
and the additional amount of ADD power needed
to see at a reading distance.
Varifocal Lenses correct
vision for two or three different
distances without the visible segment
lines seen in bifocal lenses. Instead
they have a graduated section in
which the power of the lens progresses
smoothly from one prescription to
the other, allowing the wearer to
see clearly at all distances.
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Optical
Glossary
-
Prism: The
correction required to balance the eyes
Base: The orientation of the
prism
Sphere
(SPH): Long
sighted
people
will
have
their
prescription
proceeded
by a
+plus
sign.
Short
sighted
by a –minus
sign.
The stronger
the prescription
the higher
the number.
Cylinder
(CYL): Cylinder
is only required if
you have an astigmatism
(visual distortion)
caused by an irregular
shaped cornea. This
condition is fairly
common.
Axis: Add.
This is for the bottom of
your bifocals or the amount
of extra power that you need
to be added for distance
This only applies if you
have an astigmatism (indicated
by the cylinder requirement).
The measurement indicates
the number of degrees on
the axis of the lens that
are required.
A + or – sign indicates the measurement.
PD - Pupil Distance:
This measurement is used to accurately center the lenses in the frame
that you have selected. PD is the distance from the center of the
pupil (black circle) in one eye to the center of the pupil in the
other eye. If you are unable have your Pupil Distance measured
by optician, you can try our (PRINTABLE
MILLIMETER RULER).
(please note
that you will still need to contact your optician to
get accurate Near and Dist PD measurements, required
only for bifocal and verifocal lenses)
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| Measuring
Pupil Distance (PD) |
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This measurement is used to accurately center the lenses in the frame
that you have selected. PD is the distance from the center of the
pupil (black circle) in one eye to the center of
the pupil in the other eye.
If you are unable have your Pupil Distance measured by optician, you
can try our (CLICK
HERE TO PRINT MEASURING RULER).
(please note that you will still need
to contact your optician to get accurate Near and Dist PD measurements
required only for bifocal and verifocal lenses)
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1.
Place the (PRINTABLE
MILLIMETER RULER) on the bridge of your nose.
2. Have a friend face you about arms length away.
3. Have your friend measure the distance between the center of your pupils
(or do it yourself by looking in the mirror).
4. Repeat the process two or three times for accuracy.
5. Record your results. |
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