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					                                  Younger Optics
                    TRILOGY® Semi-Finished Lens Processing Guide
                              and Technical Lens Data
         ________________________________________________________________

                                                                                                            October 2007

Introduction
This processing and technical lens data guide applies to the Trilogy® Aspheric Single Vision and IMAGE®, FT28, and
Spherical Single Vision lenses.

Trilogy® Lens Designs
1. A superior Aspheric semi-finished Single Vision lens, available in 9 base curves
        - Flatter base curves yield a more appealing lens
        - Designed for widest viewing area with greatest lens thickness reduction

2. Fourth generation IMAGE progressive lens in 4 base curves and +1.00 to +3.00 add range
3. FT28 for wide reading area.
4. 8.25 base spherical SV lens for wrap frame designs.

Index of Refraction     1.53
Density         1.11 g/cm3
Abbe Value              45

Impact resistance Trilogy lenses have been formulated to meet or exceed applicable impact resistance
requirements when laboratory finished as set forth in FDA CFR 801.410, ANSI Z80.1 and ANSI Z87.1. Any
modification of Trilogy lenses other than normal surfacing or edging may adversely affect impact performance
characteristics. Additional coating of Trilogy lenses may adversely affect the impact resistance performance. “Impact
Resistance” lenses are neither shatter proof nor unbreakable.

Chemical Resistance Excellent. Unaffected by common chemicals and solvents. Note: when tinting it is important
to clean lens surface with soapy water after using alcohol or acetone to remove marking.

UV Protection Blocks 100% UVA and UVB.

Fitting Recommendations
Aspheric Single Vision: For best results, provide laboratory with distance PD and fit at center of pupil.
IMAGE® Progressive: Distance PD and fitting height of center of pupil measured from deepest point of frame. Like
all IMAGE products, 18mm is the recommended seg height.

Incorporate standard 4o to 10oof pantascopic tilt, and equal vertex distance. Use care to balance prism thinning, if
used, for best optical performance.

Frame Selection For maximum performance, select a frame that allows the patient’s eye to be centered within the
lens area. Trilogy lenses can be used with small frames, rimless, and the perfect lens for three-piece frames.

Lens treatments
- Front side coating: Durable front side hard coat provided.
- Back side coating: Trilogy lenses are regularly dispensed without a back coating. However, for maximum scratch
  resistance, a back side coating may be applied.
- Anti-reflective coatings: Most coatings work well with Trilogy® lenses; please check with coating supplier for more
  details.
- Tinting: Please refer to “TINTING TIPS” on page 3 of this guide.
- Rolled and Polished edges: The unique molecular structure of Trilogy® lenses gives a superior jewel-like
  appearance to edges that are rolled and polished. For superior results, a small amount of surface polish may be
  used to give a higher gloss. Use light pressure when polishing.




Page 1                                           YOUNGER OPTICS
                                                   2925 California Street
TRLPTD9-03.3-06                                 Torrance, CA 90503
                                        Orders (800) 366-5367  Fax (800) 828-8771
                                            Technical Support (888) 807-4950
                                         Younger Optics
                           TRILOGY® Semi-Finished Lens Processing Guide
                                     and Technical Lens Data
                ________________________________________________________________
     ALTERNATE format for lens data
     Lens Designs:
                                                                     Spherical semi-
 PROPERTIES           Aspheric semi-finished SV lenses                                                   FT28                           IMAGE Progressive
                                                                     finished SV lens

                                                                                               Strong, light,
                     A superior aspheric design,
                                                                                               good optics
                     available in 9 base curves                  8 base lens “wrap”
                                                                                                                            Proven, fourth generation IMAGE
                     - Flatter base curves yield a more          frame compatible
                                                                                               Impact resistance            progressive lens with wide distance
                     appealing lens                              Designed for
    Benefits                                                                                   comparable to                zone and clear add region
                     - Designed for widest viewing area          decentration by prism
                                                                                               polycarbonate*
                     with greatest lens thickness                to allow cut out in
                                                                                                                            Also available in Transitions® Gray
                     reduction                                   “wrap” frames
                                                                                               Also available in
                     Also available in Transitions® Gray
                                                                                               Transitions® Gray

                                                                                               2.25, 4.25, 6.25, 8.25       2.00, 4.50, 6.50, 8.50
  Base curves        0.50, 1.25, 2.25, 3.00, 3.50, 4.25,         0.50, 2.25, 4.25, 6.25,
                                                                                               +1.00 to +3.50D adds         +1.00 to +3.00D adds in 0.25D
                     5.00, 6.00, 7.00                            8.25
                                                                                               in 0.25D increments          increments
                     Combined total sphere / cylinder
                                                                                                                            Combined total sphere / cylinder power:
                     power:
                                                                                                                            +6.00D to -8.00D
   Rx range          +6.00D to –9.00D                            +6.25D to -8.75D              +7.00D to -9.00D
                                                                                                                            Combined power may contain up to 3D
                     Combined power may contain up
                                                                                                                            cylinder
                     to 5D cylinder
                                                                                                                            Distance PD and fitting height of center
                                                                                                                            of pupil are measured from deepest
                                                                                                                            point of frame.
                     For best results, provide
     Fitting                                                                                                                Incorporate standard 4 to 10 of
                     laboratory with distance PD and fit
recommendations                                                                                                             pantascopic tilt, and equal vertex
                     at center of pupil.
                                                                                                                            distance. Use care to balance prism
                                                                                                                            thinning, if used, for best optical
                                                                                                                            performance.
     * Additional coatings may alter the impact resistance of any lens and will require impact testing to assure compliance with safety standards.

     Trilogy® Material Specific Processing Tips
     The following should be used as a guideline as different equipment may require slightly different settings and times.
     These suggestions reflect most modern generators.

     Minimum Thickness
     Trilogy lenses can be processed to a minimum thickness of 1.0mm; however discretion should be used at point of
     manufacture. Trilogy lenses can meet industry standards’ requirements at this thickness, but not all lenses should be
     processed to 1.0mm as some would be too thin for frame retention. For Rx’s between +/- 200D, we recommend a
     1.5mm thickness.

     Impact Resistance
     Trilogy lenses have comparable impact resistant to polycarbonate. Trilogy lenses have been formulated to meet or
     exceed applicable impact resistance requirements when laboratory finished as set forth in FDA regulation 21 CFR
     801.410, ANSI Z80.1 and ANSI Z87.1. Any modification of Trilogy lenses other than normal surfacing or edging may
     adversely affect impact performance characteristics. Additional coating of Trilogy lenses may adversely affect the
     impact resistance performance. “Impact Resistance” lenses are neither shatter proof nor unbreakable.

     Surface Layout
     Optical center should be placed at the geometric center of the lens.

     Blank Selection – This is most important
     It is critical to select the recommended base curve from the chart on page 3 (for Single Vision Aspheric only).
     Selecting a base different from Younger’s recommendation to achieve a desired finished lens may result in incorrect
     finished powers and limited field of view due to the lens’ aspheric design.


     Page 2                                                        YOUNGER OPTICS
                                                                     2925 California Street
     TRLPTD9-03.3-06                                              Torrance, CA 90503
                                                          Orders (800) 366-5367  Fax (800) 828-8771
                                                              Technical Support (888) 807-4950
                                  Younger Optics
                    TRILOGY® Semi-Finished Lens Processing Guide
                              and Technical Lens Data
         ________________________________________________________________
                              Recommended Base Curve Selection Chart




                          ®
Now available in Transitions Gray


Page 3                                       YOUNGER OPTICS
                                               2925 California Street
TRLPTD9-03.3-06                             Torrance, CA 90503
                                    Orders (800) 366-5367  Fax (800) 828-8771
                                        Technical Support (888) 807-4950
                                  Younger Optics
                    TRILOGY® Semi-Finished Lens Processing Guide
                              and Technical Lens Data
         ________________________________________________________________

Blocking - Alloy
Use large 50 mm blocks to provide adequate lens support during the generating process. Maintain alloy temperature
of 1200 – 1220F. Allow lenses to cool for at least 30 minutes prior to generating.
If chilling plate is available, let blocked lenses sit for 2 minutes to accelerate cooling process.

Blocking – One Step (wax)
Follow manufacturer’s recommendations. Cool blocked lenses from 12 to 18 minutes prior to generating.

Generating
Most new generators have a Trivex™ macro. If not, use polycarbonate setting. Follow manufacturer’s
recommendations for all Trilogy settings and wheel or cutter type.

Fining
Using two-step, each fine should be from 1.5 minutes to 2.0 minutes each. Recommended pads are 400 grit for first
fine, followed by a 1200 grit for the second fine. For One Step, fine for 1.5 to 3.0 minutes using 600 grit pads.

Polishing
Use equivalent polishing times and conditions for Polycarbonate, 6.0 to 7.0 minutes depending on pressures and
polish being used.


De-blocking and Cleaning

Step-OneTM
1. Use the Step-One deblocking station to remove the Freebond block
2. Use the Lens Washing Station to remove the remaining Freebond from the lens surface

Alloy Type
1. A knock-off technique is recommended.
2. Peel off the tape and wash the lens in warm water with a mild liquid detergent. Rinse with fresh running warm
    water.

Edging
Most new edging machines now have a Trivex® setting. The best edging cycle seems to be wet on the Axiom™ wheel
and then dry bevel or flat with a final few rotations wet to polish the edges. The Axiom wheel, developed by Inland
Diamond, was specifically designed for edging Trilogy lenses but is also suitable for polycarbonate and CR39 lenses.
Additional information available on CD’s provided by PPG.


Drilling
Ensure that drill bits used are sharp and drill a moderately high speed. Enter slowly, using an up-and-down motion.
Clean swarf buildup as needed to avoid heat, stress and melting.


Tinting Tips

A. For tinting base substrate (lens without backside coating)
    1. Trilogy blocks 100% of UVA and UVB so no additional UV treatment is needed
    2. Tinting should be done at approx. 170F to 175F.
    3. Tint Trilogy in 4 minute intervals, removing the lens each time and rinsing it in warm running water/ detergent
          bath. Allow lens to cool between insertions.
    4. Repeat this process until desired color density is achieved.
    5. Do not use acetone or alcohol to clean the lens prior to or after tinting. Clean with warm, soapy water.



Page 4                                          YOUNGER OPTICS
                                                  2925 California Street
TRLPTD9-03.3-06                                Torrance, CA 90503
                                       Orders (800) 366-5367  Fax (800) 828-8771
                                           Technical Support (888) 807-4950
                                    Younger Optics
                      TRILOGY® Semi-Finished Lens Processing Guide
                                and Technical Lens Data
           ________________________________________________________________

B. For tinting with tintable backside coatings
    1. A back surface tintable hard coat can also be applied.
    2. Wash lens with soapy water and rinse clean.
    3. Clean lens with Iso Propyl alcohol to remove oil and finger prints.
    4. Apply back surface coating and allow lens to cool after cure.
    5. Once again, wash lens with soapy water and rinse clean.
    6. Repeat steps 2 - 5 from A instructions above.


Fining and Polishing – Tech Specs

First Fine-               Pad:             400 grit Black (Poly type – 7 leaf)
                          Pressure:        16-18psi
                          Time:            1.5 to 2 minutes – check with pad manufacturer for recommendations
                          Coolant:         60F or less

Second Fine -             Pad:             1200 grit Brown (Poly type – 7 leaf)
                          Pressure:        16-18psi
                          Time:            1.5 to 2 minutes – check with pad manufacturer for recommendations
                          Coolant:         60F or less

Polish -                  Pad:             Standard Premium 3” Polish Pad
                          Pressure:        16-18psi
                          Time:            6 to 7 minutes approx – check with pad manufacturer for recommendations
                          Polish:          Standard optical lens polish


One Step Processes

One Step Pads –           Pad:             600 grit Black (Poly type – 7 leaf)
                          Pressure:        16-18psi
                          Time:            1.5 to 3 minutes – check with pad manufacturer for recommendations
                          Coolant:         60F or less


Checking Finished Lenses
Check as with any other aspheric lens. Digital vertometers will give an incorrect power reading away from the
geometric centre due to the asphericity of the front curve.




Page 5                                          YOUNGER OPTICS
                                                  2925 California Street
TRLPTD9-03.3-06                                Torrance, CA 90503
                                       Orders (800) 366-5367  Fax (800) 828-8771
                                           Technical Support (888) 807-4950

				
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