FreeForm® Progressives Welcome

• Digital FreeForm lenses vs. conventional lenses • What is free-form? • Digital FreeForm lenses vs. conventional lenses

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• General information about the technology • Not hard tools needed anymore • How precise the technology can be • What can be done by advanced ophthalmic design and FF technology? • Free-form can produce any ophthalmic lens type 4

General information about the technology • Free form is a manufacturing technology that allows cutting and polishing arbitrary surfaces • A lens is free-form if At least one of its surfaces is made with free form technology and That surface is not spherical neither torical* *Free form machines may cut standard surfaces, but as they can also be cut with standard methods, the corresponding lenses should not be named free-form lenses.

Not hard tools needed anymore FreeForm surfacing • Blocking • Generating • Polishing • De-blocking Diamond cutter/sintered diamond milling tool Flexible tool

How precise the technology can be • What is claimed: 0.01 D • Very difficult to achieve in plastic • Well tuned process with tools, soft pads and slurries not worn out, guarantees better precision than standard milling and polishing methods.

What can be done by advanced ophthalmic design and FF technology? • Optimize the lens for the power that the user perceives, not the power measured in the focimeter (which is ok for quality control, but is not the power perceived by the user) • Optimize the lens for any position of use (tilts, distance to the eye, etc…) • Optimize the lens for any base curve (the spherical base curves used with FF lenses) • Optimize the lens for each prescription • Optimize the lens for particular applications • Better control of lens thickness • Off-centering without losing optical quality ….. …Important improvement to the optical quality of standard lenses

Free-form can produce any ophthalmic lens type

Formation of distortion in progressive lenses <Conventional PAL>

Formation of distortion in progressive lenses <Backside PAL>

Distortion in Progressive Lenses

Wider visual field in Backside PAL Free Form progressive offers %30 wider visual field compared to conventional progressive thanks to the progressive surface on the backside of the lenses.

Comparision between FreeForm and Conventional PAL Based on the geometry of the lens to calculate the power resulted Enhanced view mainly in the central gaze direction Small degree of lateral unwanted astigmatism reduction No personalization option FreeForm Based on advanced binocular eye-lens system model Enhanced view whatever the gaze direction High degree of lateral unwanted astigmatism reduction Personalized lenses

Conventional vs. FreeForm Smaller Optical visual zones More lateral astigmatism Higher astigmatism maxims Bigger optimal visual zones Less astigmatism Lower astigmatism maxims

Advanced Ophthalmic digital power structure Each lens is individually calculated using advanced algorithms to guaranty an optimized power structure Symmetrical structure of the far power distribution Symmetrical structure of the near power distribution Inset adjusted to each wearer Binocular adaptation guaranty The symmetrical structure is very important for binocular vision, notice that each lens is horizontally opposite to the other, so when the right eye is using the nasal part of the lens, the left eye is using the temporal. If the far distance is not symmetrical the eye could find points where the quality of binocular vision is good only for one eye, so the comfort would be not good.

Automatic variable inset Inset (d) calculation method: Paramteters to be considered for inset calculation: s Near working distance l’2 Distance from lens to eye center NPD Naso-pupilar distance P Prescription

Conventional vs. FreeForm Inset Calculation Inset not taken into account in conventional lenses Correct inset calculation in FreeForm 19

Optimized reduction of lateral unwanted astigmatism • Due to the advanced eye lens system optimization the lens minimizes the lateral unwanted astigmatim.

Optimized reduction of lateral unwanted astigmatism in FreeForm Lateral unwanted astigmatism have been reduced also for the human eye The lateral unwanted astigmatism has been minimized

Enhanced vision whatever the gaze direction Conventional lens SV FreeForm individual SV

High vision performance in FreeForm With FreeForm Wider and clearer far also for oblique gaze directions Wider and clearer near Conventional

High vision performance in FreeForm Conventional PAL FreeForm PAL 1. Wider and clearer far 2. Wider and clearer near 3. Optimized intermediate 4. Minimized lateral astigmatism

Personalization Personalization according to morphological parameters: • Panto • Wrap (ZTILT) • Back Vertex Distance (BVD) • Near Working Distance • Pupillary Distances • Frame Trace 25

Personalization Average personalization: Real data personalization: • FreeForm uses average values for optimizing the final lens to make easily the lens ordering Real data personalization: • Additionally to average data, FreeForm optimizes the lens using the real values of each wearer for: IPD – Inter-pupil distance SEGHT HBOX VBOX Parameter Label Average value P.D. IPD 32 mm Vertex BVD 14 mm Pantoscopic PANTO 12º Wrap ZTILT 5 º

FreeForm Individual Power Optimized for the wearer Brand Traditional progressive FreeForm İndividual progressive User power SPH: 3.25 CYL:1.50 AX:75 ADD:2.00 Lens meter power Distance SPH: 3.19 CYL:1.43 AX:62 Near: SPH:5.10 CYL: 1.67 AX: 58 SPH: 3.25 CYL:1.50 AX:75 ADD:2.00 Base: 6.25 Index: 1.67 Base: 6.25 Index: 1.67 Prescribed power = Measured power. The final user will perceive differences due to the use position. Expected power in the lens meter. The final user will perceive the prescribed power.

Many thanks for your attention !