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Trilogy Lens Designs:
- 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
- Fourth generation Image progressive lens in 4 basecurves and 1.00-3.00 add range
*** Release date : Late 2001
Prescription Range:
+6.00D to -9.00D. Up to 4 diopters of cylinder. Can accommodate prescribed prism.
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 FDR 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.
UV Protection: Blocks 100% Uva and Uvb.
Fitting Recommendations:
- Aspheric Single Vision: For best optics, provide laboratory with distance PD and fitting height 2.0mm below center of pupil, measuring from the deepest point of the frame.
- Image Progressive: Distance PD and fitting height of center of pupil measured from deepest point of frame. Incorporate standard 4 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 three-piece frames.
Lens Treatments:
- Front side coating: Durable front side hard coat provided.
- Back side coating: Trilogy lenses are more scratch-resistant than many plastic lens materials regularly dispensed without a back coating. However, for maximum scratch resistance, a back side coating may be applied.
- Anti-reflectance coatings: These coatings work well with Trilogy lenses.
- Tinting: Trilogy lenses can be tinted to fashion and sunwear colors.
- Rolled and Polished edges: The unique molecular structure of Trilogy lenses gives a superior jewel-like appearance to edges that are rolled and polished.
Thickness Recommendations: May be surfaced down to 1 mm center or edge thickness for dress lenses.
ALTERNATE format for lens data:
Lens Designs:
| PROPERTIES |
Aspheric Semi-Finished
SV Lenses |
Image Progressive
–Release Date Late 2001 |
| Benefits |
A superior aspheric design, available in 9 base curves
- Flatter base curves yield a more appealing lens
- Designed for widest viewing area with greatest lens thickness reduction
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Proven, fourth generation Image progressive lens with wide distance zone and clear add region |
| Base curves |
0.50, 1.25, 2.25, 3.00, 3.50, 4.25, 5.00, 6.00, 7.00 |
2.25, 4.25, 6.25, 8.25
+1.00 to +3.00D adds in 0.25D increments |
| Rx range |
Sphere: +6.00D to –9.00D
Cylinder: Up to 4D of cylinder
Can accommodate prescribed prism |
Sphere: +6.00D to –8.00D
Cylinder: Up to 3D of cylinder |
| Fitting recommendations |
For best optics, provide laboratory with distance PD and fitting height 2.0mm below center of pupil, measuring from the deepest point of the frame. |
Distance PD and fitting height of center of pupil are measured from deepest point of frame.
Incorporate standard 4 to 10o of pantascopic tilt, and equal vertex distance. Use care to balance prism thinning, if used, for best optical performance. |
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