1. FreeForm® Progressives
Welcome

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

3. 3

4. • 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

5. 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.

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

7. 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.

8. 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

9. Free-form can produce any ophthalmic lens type

11. Formation of distortion in progressive lenses <Conventional PAL>

12. Formation of distortion in progressive lenses
<Backside PAL>

13. Distortion in Progressive Lenses

14. 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.

15. 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

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

17. 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.

18. 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

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

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

21. 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

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

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

24. 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

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

26. 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

27. 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: Index: 1.67
Base: 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.

28. Many thanks for your attention !