Lens Design Solution - Homepage | · PDF fileFreeform Lens Design Characteristics Satisloh & Crossbows’ Custom progressive designs are characterised by their large clear distance,

CustomLens Design Solution

powered by Crossbows

Contents

The Cooperation

Satisloh & Crossbows ................................................................................................. 2

Freeform Lens Design

Technology ................................................................................................................ 4

Characteristics ................................................................................................................ 6

Software ................................................................................................................ 8

Solution .............................................................................................................. 10

The Designs

Custom Progressive Designs ................................................................................ 14

Custom Lifestyle Designs ................................................................................ 20

Custom Blended Bifocal ................................................................................ 24

Custom Single Vision Designs ................................................................................ 26

Technical Information .............................................................................................................. 28

At a Glance .............................................................................................................. 29

Freeform lens technology is the greatest step forward for lens manufacturing in a generation.

Advances in precision freeform equipment and lens design software have made this development a reality. The technology provides lens manufacturers with new and exciting opportunities, enabling them to offer a wide range of high performance, state-of-the-art lenses.

Together Satisloh and Crossbows provide the knowledge and support to simplify the entire process. Being part of the same group and committed to this joint cooperation guarantees a fast, effi cient and successful introduction of this technology. This partnership will take full responsibil-ity for process implementation and support, providing the ideal solution and ensuring customers are always kept at the forefront of this exciting technology.

The Cooperation Satisloh & Crossbows

02 | 03

SatislohAfter many years supplying quality turn-key manufacturing solutions for Rx labs, Satisloh, the specialist in surfacing, coating and fi nishing of ophthalmic lenses takes the next step.

Now Satisloh provides freeform design solutions in coopera-tion with Crossbows Optical Ltd., the ideal experienced part-ner in optical designs.

CrossbowsCrossbows Optical Ltd. was formed in 1987 although oph-thalmic products have been manufactured in their factory since 1946. With this long history, Crossbows has gained a wealth of experience in the design and manufacturing of a wide range of ophthalmic products.

Since 2004 Crossbows has utilised their extensive progres-sive lens design expertise to develop advanced freeform software for back surface progressive lenses.

The Ideal PartnershipCombining a leading freeform machine manufacturer with an expert freeform software developer provides the perfect so-lution. This guarantees total compatibility of machines and software for effortless implementation of the freeform pro-cess.

• A machine specialist and a lens design software specialist with many years’ experience

• Perfect integration of machine and software• Evaluation and quality reporting• Service and support from a single source

What is a freeform lens?

A freeform lens normally has a spherical front surface and a complex, three-dimensional back surface which incor-porates the patient’s prescription. In the case of a freeform progressive lens, the back surface geometry includes the progressive design.

The freeform process utilises semi-fi nished spherical lenses which are readily available in a wide range of base curves and indices. These lenses are accurately machined on the back side using state-of-the-art generating and polishing equipment to create the exact prescription surface.

• the front surface is a simple spherical surface• the back surface is a complex three-dimensional surface

Freeform Lens DesignTechnology

04 | 05

Technology for freeform lenses

General benefi ts• Provides the fl exibility to offer a wider range of high level

products, even for the smaller optical laboratory• Only requires a stock of semi-fi nished spheres in each

material from any quality source• Lab management is simplifi ed with signifi cantly fewer SKUs • Progressive surface is closer to the eye - providing broader

fi elds of view in the corridor and reading area• Accurately reproduces the intended progressive design• Prescription accuracy is not limited by the tooling steps

available in the laboratory• Accurate prescription alignment is guaranteed

Custom: The Satisloh & Crossbows freeform solution

Special benefi ts• Provides technically advanced, low distortion soft aspheric

designs• A range of designs which easily fi t a wide selection of frame

shapes and sizes• Designs provide superior comfort with fast and successful

adaptation• New indices or designs can be added with a software

upgrade • Available in an extensive range of materials and indices • Variable design decentration option allows the use of

smaller blanks, resulting in thinner and lighter lenses • Can also operate with circular or elliptical crib shapes pro-

viding the thinnest and lightest lenses • Special curve control in the reading area for fl atter, more

cosmetically appealing lenses • Provides exact lens thickness control at any point - ideal

for rimless frames • Incorporates both prism thinning and prescription prism • Allows capability to create your own brand name

Advanced features

• EyeView technology: Multipoint ray-tracing giving improved overall performance which is consistent over the full range of prescription powers

• Optics First: Patented premium progressive lens design for superior comfort

• Compensated prescription: adjusts lens prescription for back vertex distance, pantoscopic tilt and face bow

• Blended edges: fl attens the concave curvature to provide a reduction in edge thickness

• Variable inset: adjusts inset for different near viewing distance, back vertex distance, lens power and monocular pupillary distance

Freeform Lens DesignCharacteristics

Satisloh & Crossbows’ Custom progressive designs are characterised by their large clear distance, intermediate and reading areas and low rates of change of astigmatism. This provides the patient with excellent clear vision under all viewing conditions.The soft designs provide the patient with excellent comfort and easy adaptation for all corridor lengths and material types. This ensures high levels of customer satisfaction and exceptionally low non-tolerance levels.

The corridor lengths are all measured from the fi t point to 100% of addition power, ensuring that even at the mini-mum fi tting height, the patient has a useable reading area. The range of fi tting heights and designs allow the patient the choice of a wide variety of frame shapes and sizes.

The following individual measurements are part of the design calculation:

IPD, monocular pupillary distanceFH, fi tting heightHBOX, horizontal lens size (box system)DBL, distance between lensesVBOX, vertical lens sizeZTILT, face bowPANTO, pantoscopic tiltBVD, back vertex distance

DBL

IPD

HBOX

FH

VBOX

Custom design characteristics

• Superior designs with excellent optical properties • Wide clear distance, intermediate and reading areas • Corridor lengths are measured from fi t point to 100% of

addition power• Wide range of corridor lengths and designs available• Multi-purpose and specifi c niche designs offered• Simple to dispense• Fast adaptation• High adaptation success rate• Superior patient comfort

Distance

Addition Zone

DistancePower

AdditionPower

Corridor Start

Corridor End

IPD

HBOX

FH

VBOX

06 | 07

ZTILT

PANTO

BVD

The Custom freeform software was created to enable pro-duction of fi nished progressive lenses from semi-fi nished spheres where the progressive design is machined on the concave side and incorporates the patient’s prescription.

The software can be used in conjunction with Satisloh’s freeform CNC machinery and lab management system to provide the fi nished lenses for the laboratory’s customers. Software integration is a simple process with the assis-tance of the experienced team of Satisloh and Crossbows.The software has been designed from its inception to be both fl exible and easy to use.

Software application and integration

The Custom freeform software can be integrated as a stand-alone solution in virtually any lab software environ-ment, however both companies have carried out extensive work to ensure that the Crossbows freeform software and the Satisloh lab management system are fully compatible.

• File outputs are compliant with the latest Vision Council (VC) standards. The software has the ability to be inte-grated with VC compliant lab management systems.

• The lab management system (LMS) supplies the job information to the Custom freeform software with a lens design system (LDS) fi le.

Freeform Lens DesignSoftware

08 | 09

CustomFreeformSoftware

Storage Area

Laboratory ManagementSystem

Generators/Polishers

LMS

LDS

Rx

SDF

Order Entry

• From these details the Custom freeform software calculates the surface data for the progressive design incorporating the patient’s prescription and the center and edge thick-nesses.

• The surface data fi le (SDF) is sent to a storage area which can be accessed by the generating and polishing ma-chines.

• The location of this storage area and the prescription details are sent to the lab management system in an LMS fi le.

• When requested, the lab management system sends the data location and any other information required to the rel-evant machinery, which may include the blocker, generator, polisher, laser engraver etc.

• Credit is managed on a pay per use basis. Each time the freeform software is run the appropriate amount is deduct-ed from the customers’ credit.

• The remaining credit is displayed on the program status bar.A warning will appear on the screen when the design fee credit reaches a pre-determined level to remind the user to order.

The unique partnership of Satisloh and Crossbows pro-vides the customer with a complete freeform solution from one source, where a world class specialist can be directly accessed for each step of the process.Working in total harmony Satisloh and Crossbows guaran-tee that no production or software issues are left unre-solved.

As a further benefi t, a regular quality monitoring and reporting system is provided to ensure that the freeform lenses produced meet exacting standards of design, power and cosmetics. This helps maintain a stable and accurate manufacturing process, providing the confi dence that the freeform lenses supplied to your customers are of a consistently high quality.

Freeform Lens Design Solution

10 | 11

Custom - the perfect freeform solution:

• Hassle-free software installation• Simple software/machine integration• User friendly software• Stand-alone solution with calculation on-site• Support direct from the machinery/software experts• Use of any range of semi-fi nished spherical blanks• Excellent range of designs in all popular indices• Progressive designs in a wide range of corridor lengths

giving superior optical performance and excellent cosmetic appearance

• A wide selection of lifestyle progressive designs for many applications

• Freeform aspheric/atoric single vision with outstanding optical performance at all gaze angles

Design evaluation and quality reporting

• Test lenses for evaluation can be sent to Satisloh• The test will be carried out on one pair of lenses in each

material per month• Satisloh will report on:

- prescription accuracy of the test lenses- design reproduction- lens cosmetic quality

• Satisloh will offer recommendations on process changes or alterations as necessary

Silver Package Gold Package(includes Silver products)

Platinum Package(includes Gold products)

Custom 14, 16, 18Custom Offi ceCustom Blended Bifocal Custom Single Vision

Custom U (13, 14, 15, 16, 17, 18)Custom JuniorCustom RelaxCustom Driver

Custom V (13, 14, 15, 16, 17, 18)

Custom Freeform Packages

There are three levels of software packages available:

• The Silver Package provides a full progressive design range, an offi ce design, a round segment bifocal and a single vision design.

• The Gold Package adds an enhanced progressive de-sign range plus a wider selection of lifestyle products.

• The Platinum Package adds our premium designs with the greatest range of software functions.

EyeView Technology Improves lenses for real life viewing

Ophthalmic lenses have oblique power errors which are pres-ent when viewing away from the optical center of the lens.EyeView technology uses specially developed software which incorporates the results of raytracing over the entire lens to correct for these errors. Back vertex distance and pantoscopic tilt are used in these complex calculations.

• More consistent optical performance over the range of prescription powers

• Wider viewing areas for hyperopes (plus prescriptions)• Improved distance area for myopes (minus prescriptions)• Improved image quality in principal viewing areas

Incorporated in

Custom U Custom V Custom Single Vision

Surface Analysis Raytrace of non-EyeView design

Raytrace of EyeView design

EyeView

Optics FirstDistributes the mean power smoothly

Optics First introduces a new generation of sophisticated lens designs providing exacting standards of vision for the discerning progressive lens wearer. It is a radical approach which reverses the normal design process and has allowed the lens design to be created from the outset with a very smooth mean power profi le.

• Provides premium progressive lens design with superior comfort

• Allows for natural eye movement• Provides sharp viewing in any direction• Minimizes blurring or “swim effect” expe-

rienced with traditional progressive designs• Results in faster patient adaptation times

and greater patient satisfaction

Incorporated in

Custom V

Optics First

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Cylinder Maps

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Power Maps

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ght

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OriginalLevel 1Level 2FrontAperture

Front Curve Base 4, Sphere Power -4, Index 1.498Edge Thickness (mm)

Original - 4.35Level 1 - 3.46Level 2 - 2.78

Considers the “as worn” condition

Prescription Compensation is an extension of the EyeView principals, were an individual’s back vertex distance, panto-scopic tilt and face bow are used to adjust the sphere, cylinder and axis of the prescription to give the best as worn condition possible. This involves using a complex model of how the eye looks through the lens.

Incorporated in

Custom V Custom Single Vision

Prescription Compensation

PrescriptionCompensation

Gaze anglePantoscopic tilt

Back vertex distance

Edge BlendingReduces the edge thickness

Edge Blending allows an improvement in the cosmetic appearance of lenses by fl attening their outer edges and making them lighter and thinner.

• Central circular aperture unchanged• Edge thickness benefi t on minus lenses• Center thickness benefi t on plus lenses• Limited by generator cutter radius on plus lenses• Variable aperture diameter• Two levels of blending: Level 1 - Moderate, Level 2 - High

Applicable to

all Custom Lens Designs

without Edge Blending

with Edge Blending

Face bow angle

The DesignsCustom Progressive

The extensive range of the Custom Progressive designs will accommodate most frame shapes and sizes with fi t-ting heights from 14mm and upwards. They offer the pati-ent outstanding optical performance, comfort and choice. All Custom Progressive designs have low levels of astigmatism with wide usable distance, intermediate and reading areas.

All are available in a wide selection of material types and indices.

Custom 14/16/18: Good standard progressive range

Custom U: Gives greater comfort, faster adaptation and sharper all over vision

Custom V: A premium product with unparalleled levels of smoothness for the most discerning patient

14 | 15

Custom 14/16/18

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• 14/16/18mm corridor lengths to full addition power• Minimum fi tting heights of 15/18/20mm

• Low distortion soft aspheric design• Individual designs for left and right eyes• Variable design decentration

Power Range

+6.00 dpt to -10.00 dpt, up to -4.00 dpt cylinder (depending on range of semi-fi nished spheres)

Addition

0.75 to 3.50 in steps of 0.25 dpt

Index

1.498, 1.53, 1.56, 1.586, 1.60, 1.67 and 1.74

Cylinder MapsDimensions

The Custom 14 progressive is designed specifi cally for frames with small lens height (B size). This is achieved in a soft design without compromising the distance, corridor and reading areas.

Custom 16 successfully combines a soft design with widedistance, intermediate and reading areas. This design also benefi ts from having low rates of change of mean power and maintains good dynamic vision throughout.

The Custom 18 design with its low rates of change and lev-els of astigmatism provides good dynamic vision combined with generous intermediate and reading areas. Maximum astigmatism is located on the nasal side where most of it will be edged away.

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Custom 16

Custom 14

Custom 18

Custom U

• Corridor length varies from 13mm to 18mm• Minimum fi tting height of 14mm

• Incorporates EyeView technology• Automatic corridor length selection based on frame

shape and patients fi tting details • Low distortion soft aspheric design• Individual designs for left and right eyes• Variable design decentration

13mm

EyeView

4mm

9-14mm

Addition Inset 2.5mm

15mm14mm

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Dimensions

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Custom U is designed to make use of EyeView technology, which gives the lenses more consistent optical performance regardless of the prescription power. This design is also equipped with automatic corridor selection which ensures the best lens is chosen for a particular patient’s fi tting de-tails and frame choice.

Power Range


Addition


Index

1.498, 1.53, 1.56, 1.586, 1.60, 1.67 and 1.74

16mm 18mm17mm

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Custom V

• Corridor length varies from 13mm to 18mm• Minimum fi tting height of 14mm

• Incorporates Optics First• Prescription compensation for as worn condition• Variable inset• Incorporates EyeView technology• Automatic corridor length selection based on frame

shape and patients fi tting details• Low distortion soft aspheric design• Individual designs for left and right eyes• Variable design decentration

EyeView Optics First PrescriptionCompensation

13mm 15mm14mm

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Dimensions

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Custom V has been designed using Crossbows latest Optics First design system. This radical approach reverses the normal design process and has allowed Custom V to be designed from the outset with a very smooth mean power profi le, thus minimizing swim effects and providing excel-lent patient comfort and rapid adaptation.

Power Range


Addition


Index

1.498, 1.53, 1.56, 1.586, 1.60, 1.67 and 1.74

16mm 18mm17mm

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The DesignsCustom Lifestyle

The Custom Lifestyle range covers progressive lenses which have been designed with specifi c needs in mind. They do not have the all-round capabilities of a normal progressive lens, but do excel in carefully selected areas. Whether you require a lens for playing music, computer use, driving, cooking or reading, there is a Custom Life-style product for you.

In addition to normal progressive lens wearers, there are also designs that are suitable for:

• alleviating eye strain associated with near and interme-diate work for the non-presbyope

• controlling the advance of myopia in young people

Power Map

Reading Inset 2.4mm

14mm

Fit Point

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Custom Offi ce

• A superior design of offi ce progressive lens• Low distortion soft aspheric design• Individual designs for left and right eyes• Variable design decentration• Eight dynamic powers available

The wide range of dynamic powers allows the ideal choice to be made for all reading additions up to 3.00 dpt and also allows the user to benefi t from fully corrected reading and intermediate vision. The distance vision will be restricted but will be more than adequate for use in an offi ce environ-ment. The design may help to reduce eye and neck strain associated with long term use of computers.

Notes:• Dynamic power is the total reduction in power from

reading to distance area• Lens is verifi ed in reading reference circle only• Dynamic power is selected from patient’s addition• Lens is fi tted using patient’s distance PD (pupillary

distance)

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The Custom Offi ce freeform lens is designed primarily for use in an offi ce-type environment, however it also functions well for any task where intermediate and reading vision is of paramount importance. It is not a traditional progressive design, but rather is an alternative to a reading lens, provid-ing clear vision for reading and intermediate viewing. The main differences between a reading progressive and offi ce design are as follows: a reading lens allows a presbyope to have clear near vision, but renders anything beyond this distance out of focus. A progressive lens allows clear dis-tance and near vision connected by a corridor of intermedi-ate vision. An offi ce lens has a reduced width of distance area and normally has a smaller change in power than a conventional progressive which results in a much wider central fi eld and a reading area with very low distortion.

Power Range


Dynamic Power

-0.75 to -2.5 in steps of 0.25 dpt

Index

1.498, 1.53, 1.56, 1.586, 1.60, 1.67 and 1.74

Astigmatism in a progressive lens Astigmatism in an offi ce lens

Custom Driver

• Corridor length 20mm • Minimum fi tting height of 21mm

• Low distortion soft aspheric design• Individual designs for left and right eyes• Variable design decentration • Wide clear distance area• Wide clear corridor• Low unwanted astigmatism

The Custom Driver has been designed with the specifi c vision requirements of driving in mind. Clear distance vision is the absolute priority with improved middle distance vision compared to other progressive de-signs for reading the dashboard, using satellite navigation and seeing in mirrors.

Custom Junior

• 13mm corridor lenght to full addition power• Minimum fi tting height of 14mm

• Low distortion soft aspheric design• Individual designs for left and right eyes• Variable design decentration

The Custom Junior progressive is designed specifi cally to help reduce the onset of myopia in young people between the ages of 8 and 16 years. The design offers a large stable reading area combined with excellent peripheral clarity in the distance zone.

Power Range

+6.00 dpt to -10.00 dpt, up to -4.00 dpt cylinder(depending on range of semi-fi nished spheres)

Addition


Index

1.498, 1.53, 1.56, 1.586, 1.60, 1.67 and 1.74

Power Range


Addition


Index

1.498, 1.53, 1.56, 1.586, 1.60, 1.67 and 1.74

Custom Relax

• 14mm corridor length to full addition power• Minimum fi tting height of 15mm

• Very soft design with very low distortion• Distortion free distance area and corridor• Individual designs for left and right eyes• Variable design decentration

The Custom Relax design is a progressive design for peo-ple who are not presbyopic. It helps to avoid the patients’ eyes becoming tired and strained if they spend a large portion of the day focusing at the same distance, e.g. using a computer or reading. It is available in two forms; Custom Relax I has an addition of 0.66 dpt, Custom Relax II has an addition of 1.00 dpt.

Power Range


Addition

Custom Relax I: 0.66 dptCustom Relax II: 1.00 dpt

Index

1.498, 1.53, 1.56, 1.586, 1.60, 1.67 and 1.74

22 | 23

Power Map Cylinder MapDimensions

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30

-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30-30

-25

-20

-15

-10

-5

0

5

10

15

20

25

30

2mm

18mm


The Custom Blended Bifocal design is a bifocal but without the obvious line around the reading segment. The power changes from the distance prescription to the reading prescription over a small region which makes the bifocal segment almost invisible. This results in exception-ally wide and large distance and reading areas compared to progressive lenses.

The Design Custom Blended Bifocal

Standard Bifocal Lens

Custom Blended Bifocal Lens

24 | 25

Custom Blended Bifocal

• Exceptionally wide clear distance area• Exceptionally wide clear reading area• Choice of segment diameter• Choice of segment position• Choice of blended region width• Prescription is incorporated into bifocal surface

Available in all Custom Freeform Software packages:Silver, Gold and Platinum

Power Map

-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30-30

-25

-20

-15

-10

-5

0

5

10

15

20

25

30

Cylinder MapDimensions

• Exceptionally wide clear distance area• Exceptionally wide clear reading area• Choice of segment diameter• Choice of segment position• Choice of blended region width• Prescription is incorporated into bifocal surface

-30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30-30

-25

-20

-15

-10

-5

0

5

10

15

20

25

30

Power Range


Addition


Index

1.498, 1.53, 1.56, 1.586, 1.60, 1.67 and 1.74

Available in all Custom Freeform Software packages:Silver, Gold and Platinum

Segmentverticalposition

Blendedregionwidth

Segmentdiameter

Inset

The DesignsCustom Single Vision

For the non-presbyope there is an excellent freeform single vision range with sharp vision at all viewing angles. This range is available in a wide selection of material types and indices.

Custom Single Vision lenses minimise unwanted astigma-tism associated with conventional single vision lenses. Using EyeView technology combined with Prescription Compensation results in a lens with superior optical per-formance, not only on the horizontal and vertical axes, but over the entire lens surface.

There are also benefi ts to be gained both in terms of thick-ness and cosmetic appearance as fl atter base curves can be used without sacrifi cing optical performance.

EyeView

PrescriptionCompensation

26 | 27

Standard Single Vision

This analysis shows the unwanted astigmatism of two different single vision lenses, one spherical and one toric over a range of gaze angles.

Once the eye moves away from the central viewing position and looks obliquely through the lens, unwanted astigmatism is present.

+4.00 lens

-30 -20 -10 0 10 20 30-30

-20

-10

0

10

20

30

-30 -20 -10 0 10 20 30-30

-20

-10

0

10

20

30Key

0.0 - 0.1 dpt

0.1 - 0.2 dpt

0.2 - 0.3 dpt

0.3 - 0.4 dpt

0.4 - 0.5 dpt

0.5 - 0.6 dpt

0.6 - 0.7 dpt

0.7 - 0.8 dpt

Custom Single Vision

When the same analysis is done on Custom Single Vision lenses, nearly all of the unwanted astigmatism that was in the standard single vision lenses is no longer present. This reduction in aberration is achieved not only on the horizon-tal and vertical axes but over the entire lens surface. The differences are particularly marked towards the periphery of the lens compared with the conventional single vision lenses.

-30 -20 -10 0 10 20 30-30

-20

-10

0

10

20

30

-30 -20 -10 0 10 20 30-30

-20

-10

0

10

20

30

+4.00 lens+4.00 -2.00 lens +4.00 -2.00 lens

Single Vision Aspheric Custom Single Vision

spherical toric spherical toric

Power Range

Typical power range: +8.00 dpt to -10.00 dpt, up to -4.00 dpt cylinder (depending on range of semi-fi nished spheres)

Index

1.498, 1.53, 1.56, 1.586, 1.60, 1.67 and 1.74

• Software installed on freeform customer’s computer• Software runs on local standard PC with Windows XP

Service Pack 2 or newer• Software provided complete with USB license key• Order entry using a number of lab management systems

including Satisloh’s AF-Client or manually• Maintenance and updates provided via electronic transfer• Pre paid design fees are transferred electronically• Low limit credit warning

Freeform Lens Design Technical Information

28 | 29

Range at a glance

Silver Package

Gold Package

Platinum Package

Custom 14, 16, 18

Good standard progressive range where the optician chooses the corridor length. � � �

Custom Offi ce

For offi ce use, computer use, or any application or occupation that involves a signifi cant amount of close up and intermediate work, for example, musicians or mechanics.

� � �


Bifocal with almost invisible bifocal segment with wide and large distance and reading areas.� � �


Provides very clear and sharp all over vision customized for the patient. � � �

Custom U (13, 14, 15, 16, 17, 18)

For the more discerning patient. EyeView technology provides greater comfort, faster adaptation and sharper all over vision. Automatically chooses the most suitable corridor length.

� �

Custom Junior

Helps reduce the onset of myopia in children. � �

Custom Relax

Reduces visual fatigue for non presbyopes who make signifi cant use of their near vision.

� �

Custom Driver

With the emphasis on distance and intermediate viewing this is the ideal design for driving. � �

Custom V (13, 14, 15, 16, 17, 18)

For the most discerning patient:• premium product • provides the ultimate in comfort • shortest adaptation times • minimizes swim effects • has the sharpest all over vision • automatically chooses the most suitable corridor length

�

Parameters at a glance

Custom 14, 16, 18

Custom U Custom VCustomLifestyle



Prescription data � � � � � �

Frame box data � � � � � �

Frame trace � � � � � �

Distance between lens � � � � � �

Monocular PD � � � � � �

Fitting Height � � � � � �

Pantoscopic tilt – standard � � � � � �

Pantoscopic tilt – individual � �

Face bow angle – individual � �

Back vertex distance – standard � � � � � �

Back vertex distance – individual � �

Features at a glance

Custom 14, 16, 18

Custom U Custom VCustomLifestyle



Variable design decentration � � � � � �

Prescription prism by blocking � � � � � �

Prescription prism by machining � � � � � �

Prescription prism by combination of blocking/machining

� � � � � �

Thickness control for rimless frames � � � � � �

Circular or elliptical crib shapes � � � � � �

Edge blending � � � � �

Plate height reduction � � � � �

“EyeView” technology � � �

Prescription compensation � �

Manual variable inset � �

Automatic variable inset �

“Optics First” technology �

Notes

30 | 31

ContactSatisloh AGNeuhofstrasse 12CH - 6340 BaarSwitzerlandPhone: +41 (0) 41766 16 16Fax: +41 (0) 41766 16 10Mail: [email protected]

www.satisloh.com

© S

atisloh / KH

/ February 2013

Sub

ject to technical changes

Crossbows Optical Ltd.Unit 1, Halfpenny Valley Ind EstPortadown RoadLurganCo ArmaghBT66 8TPN IrelandPhone: +44 (0) 28 3832 2301Mail: [email protected]

Documents

Lens Design Solution - Homepage | · PDF fileFreeform Lens Design Characteristics Satisloh & Crossbows’ Custom progressive designs are characterised by their large clear distance,