Fitting individual progressive lens
Gradal
Individual
FrameFit
NEW from Carl Zeiss Vision: Revolutionary ZEISS progressive lens
that fits any frame
February 2007, Carl Zeiss Vision will commence local Australian
production of ZEISS Individual Framefit™, a revolutionary new progressive lens
design.
First launched in late 2006, ZEISS Individual
FrameFit is a freeform progressive lens design that offers the
optical benefits of individual optimisation for every power.
The key new and unique feature that ZEISS Individual FrameFit
offers is a variable progression zone. For the first time, eyecare
professionals can vary the progression zone and order fitting heights between
14 and 20mm. The lens design can be adapted to each patient’s frame – with the
key benefit to the patient being freedom of frame choice.
Measuring the correct corridor length for ZEISS Individual
FrameFit is simple and fast with an innovative centration chart. A sliding
mechanism within the centration chart allows eye care professionals to adjust
the corridor length until an acceptable near power is achieved, providing a
FrameFit value for ordering.
Until now, ZEISS Individual FrameFit needed to be ordered from
Germany. Carl Zeiss Vision Australia is one of the first laboratories outside
of Germany to be accredited by Carl Zeiss to process the unique ZEISS
Individual FrameFit design.
According to Mr Tony Gray, Carl Zeiss Vision General Manager
Australia/New Zealand, “ZEISS Individual FrameFit offers some very real, unique
benefits. For dispensers, it means a much easier dispensing process – they
simply won’t have to advise patients that the frame they’ve chosen is not
suitable. For wearers, it means they can choose any frame they please, and be
guaranteed of outstanding optical performance.”
1 FRAME SELECTION
For best vision and appearance, encourage the patient to choose
a frame in which the eyes are well centered and with a “B” dimension of 21mm or
larger. Nose pads are preferred to allow fine-tuning of the adjustment. Frames
should be lightweight to reduce slippage.
2 PRE-ADJUST FRAME
The frame must be adjusted correctly before taking any
measurements.
Ensure the following:
-
7° to 12° pantoscopic angle is usual, however pantoscopic
angles up to 30° can be specified
-
Proper face form wrap, up to 15°
-
Close frame fit (i.e., short vertex distance), without
touching skin or eyelashes.
3 MARK PUPIL CENTER AND MEASURE MONOCULAR
PUPILLARY DISTANCES
With the patient looking straight ahead into the distance, dot
each lens at the center of the pupil. Measure monocular distance PDs using a
digital pupillometer or a PD ruler.
4 DETERMINE FITTING HEIGHT
Using the Zeiss Individual™ Fit Height Tool (part
#000-0139-14700), place the frame over the lens illustration with the dot over
the fitting cross. Measure each monocular fitting height by choosing the
Fitting
the zero ‘0’ at the lens plane, and measure the distance in
millimeters from the back of the lens to the front of the
eye.
Zeiss
Individual™ is suitable for vertex distances up to 20mm.
If no vertex measurement is specified when ordering, then an average value of
14 .5 mm will be used.
5 MEASURE FRAME WRAP ANGLE
Using the Zeiss Individual™ Frame Wrap Tool (part
#000-0139-14700), place the frame top down on the tool aligning bridge center
and left lens as shown. Measure the frame wrap angle from the base of the tool
to the right lens angle.
Zeiss Individual™ is suitable for frame wrap up to 15°.
If no frame wrap angle is specified in the lens order, an average value of 5°
will be used.
6 PANTOSCOPIC TILT
With a pre-adjusted frame and the patient standing in profile
looking straight ahead, use the Zeiss Individual™ Panto
and Vertex Tool (part #000-0139-15450) to measure
the pantoscopic tilt of the frame on their face. Place the
vertical edge of the panto tool against the plane of the frame. The pendulum of
the tool will automatically line up vertically and show the pantoscopic angle
of the frame.
Zeiss Individual™ is suitable for pantoscopic tilt up to 30°.
If no pantoscopic tilt is specified in the lens order an average value of 9°
will be used.
7 BACK VERTEX DISTANCE
With the patient standing in profile, place the ruler edge of
the Zeiss
Individual™ Panto and Vertex Tool along
the frame temple with the zero ‘0’ at the lens plane,
and measure the distance in millimeters from the back of the lens to the front
of the eye.
Zeiss Individual™
is suitable for vertex distances up to 20mm.
If no vertex measurement is specified when ordering, then an average value of
14 .5 mm will be used.
8 VERIFY CUT OUT
Use the Zeiss Individual™ Centration Tool
(part #000-0139-14700) to ensure proper lens cut out. Place the right lens over
the Lens Cut Out circle, aligning the pupil center dot over the fitting cross;
repeat with left lens. If frame falls outside the lens diameter available,
lenses may not cut out.
9 SPECIFY PERSONAL ENGRAVINGS
A three letter personalized patient engraving may be specified
for Zeiss Individual™ lenses. Use this code for the patient‘s name or initials
as a proof of lens personalization.
Note: Due to the variable corridor length design of Zeiss
Individual™, fitting height must be specified on all orders – including uncuts.
Height Indicator
at the lowest point of the inside rim of the frame.
Zeiss Individual™ is suitable for fitting eights 13 to 35 mm.
Gradal
Individual® FrameFit, an Individualised progressive lens, is a further
advancement of Gradal Individual®. With this lens the length of the progression
zone can be all-time first adapted steplessly and variably to any frame chosen
by the wearer. With Gradal Individual® FrameFit it is possible to meet customer
requirements even more exactly and precisely than Gradal Individual, as it is
the optimum progressive lens for every wearer and for all frames, regardless of
the frame size. Once the wearer has chosen the frame, his or her personal
parameters are determined and the progressive lens is then precisely matched to
the needs of the individual customer. In addition to the known optimization
parameters, FrameFit makes it possible to take each individual fitting height
into account. FrameFit defines the individual length of the progression zone.
In addition, the wrap or bow angle of the frame can also be specified for
further optimization of the lens design.
To make the individuality of the lens "visible" for the wearer, a personalised
engraving (upto 5 digits) can be also applied on request, as an additional
permanent engraving on the lens.
Gradal Individual® FrameFit now also comes with LotuTec™ coating. LotuTec™
coating is the world's best protective coating which makes lenses resistant to
dirt, enhances wearing comfort, improves clarity and facilitates easier
cleaning. The use of LotuTec™ coating improves the overall performance of this
state-of-the-art lens.
Benefits for the
wearer
-
Physiologically adapted design for maximum tolerance
-
Wide progressive zone and a wide, stable near zone
-
Smooth transitions for optimum visual comfort
-
Unprecedented clarity
-
Light weight lenses: up to 4O% lighter than a glass lens
of the same index
- Freedom
to choose any frame
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