Precizon Presbyopic
Model 570 A0 / A1
What makes this lens unique?
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CTF (Continuous Transitional Focus) optic
A CTF optic is an optic with an anterior surface with multiple segments for far and near. A smooth transition from far to near is achieved between the segments. This transition offers a constant defocus between the two sharp focal points, delivering excellent intermediate vision.
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CTF is designed for:
- Natural Vision at all distances
The transitional zones of the CTF optic offer a full range of vision from near to infinity with a smooth continuous transition. The CTF aspheric surface forms a broad beam of light, a zone with an enhanced depth of focus with uninterrupted high-quality images for the brain to translate into clear vision at all distances.
- Reducing Glare & Halos
The misalignment tolerance and the use of segments instead of concentric rings reduce photic phenomena thereby helping patients to adapt more naturally to their new vision.
- Pupil independence
The distribution of the zones is such that in different pupil apertures, under different lighting conditions, the patient can always benefit from the same light distribution for near and far vision. Surgeons can opt for a 50/50 or a 60/40 far/near light distribution ratio.
- Decentration tolerance
In cases of tilt or misalignment, the patient can still benefit from the same near and far vision as the segmented zones allow an equal and steady light distribution.
Specifications:
The Precizon IOL Family offers you the opportunity to choose the best model for your patients. When you treat cataract patients with presbyopia, you can choose between the:
- Precizon Presbyopic model (570 A0) and the
- Precizon Presbyopic NVA model (570 A1).
Both models make use of the CTF technology. The main differences remain in the segment sizes, light distribution for far and near, and in the IOL aberrations.
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Precizon Presbyopic (570 A0)
| Model: | 570 A0 Precizon Presbyopic | One piece IOL |
|---|---|
| Optic type: | Aberration neutral, Continuous Transition Focus (CTF) optic |
| Central far zone size Y/X: | 0.5 / 2.0 mm |
| First near segment direction (in / out): | inwards |
| Rotated segments width: | 0.75 mm |
| Number of segments rings: | 3 n |
| UV cut off: | <10% @360 nm |
| Refractive Index: | 1.46 |
| Abbe number: | 47 |
| Optic Powers: | +1.0 D to + 35.0 D (0.5 D increments) Power add +2.75 D. |
| Haptic configuration: | Open modified C-loops with offset shaped haptics |
| Lens Material: | Hybrid hydrophobic & hydrophilic monomers. Ultraviolet filtering HEMA/EOEMA Copolymer |
| Lens colour: | Clear |
| Body Ø: | 6.0 mm |
| Overall Ø: | 12.5 mm |
| Haptic Angle: | 0° |
| Centre thickness range: | 0.8 to 1,3 mm |
| Body edge thickness: | 0.4 mm |
| A-constant ultrasound: | 118.0 |
| A-constant optical: |
118.6 (SRK T) |
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Precizon Presbyopic NVA (570 A1)
| Model: | 570 A1 Precizon Presbyopic NVA | One piece IOL |
|---|---|
| Optic type: | Aberration Negative (- 0.11 μm), Continuous Transition Focus (CTF) optic |
| Central far zone size Y/X: | 1.4 / 2.6 mm |
| First near segment direction (in / out): | outwards |
| Rotated segments width: | 0.60 mm |
| Number of segments rings: | 3 n |
| UV cut off: | <10% @360 nm |
| Refractive Index: | 1.46 |
| Abbe number: | 47 |
| Optic Powers: | +1.0 D to + 35.0 D (0.5 D increments) Power add +2.75 D. |
| Haptic configuration: | Open modified C-loops with offset shaped haptics |
| Lens Material: | Hybrid hydrophobic & hydrophilic monomers. Ultraviolet filtering HEMA/EOEMA Copolymer |
| Lens colour: | Clear |
| Body Ø: | 6.0 mm |
| Overall Ø: | 12.5 mm |
| Haptic Angle: | 0° |
| Centre thickness range: | 0.8 to 1,3 mm |
| Body edge thickness: | 0.4 mm |
| A-constant ultrasound: | 118.0 |
| A-constant optical: |
118.6 (SRK T) |
Publications:
| 2018 Ramón Ruiz Mesa MD, Tiago Monteiro MD Continuous Transitional Focus (CTF): A New Concept in Ophthalmic Surgery Ophthalmology and Therapy, April 20, 2018 |
Contact us for more information:
Email: info@es.ophtec.com
Presentations
