The Precizon Presbyopic uses two patented technologies in its optic. The first one is transitional conic toric (TCT) technology which makes the lens more forgiving to decentration during surgery with less loss of quality of vision. The second is continuous transitional focus (CTF) technology which offers your patient a full range of vision from near to infinity with a smooth continuous transition.
Precizon Presbyopic Toric
Model 575Precizon Presbyopic is a hydrophilic acrylic IOL designed to correct presbyopia and astigmatism.
- Tolerance for misalignment
- Natural vision at all distances
- Reducing glare and halos
CTF
This lens is designed with CTF, where a multiple segments optic on the anterior surface achieves a smooth transition from far to near focus. This transition offers a constant defocus between the two sharp focal points, delivering excellent intermediate vision.
TCT
A TCT optic is the foundation of astigmatism correction. A TCT optic is tolerant of misalignment because different conic constants are calculated, not only on the horizontal and vertical axis, but also between 0° and 90° degrees.
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.
Tolerance of misalignment
In a significant percentage of cases, IOLs tend to rotate a few degrees before they stabilize. This leads to a loss of quality of vision in regular toric IOLs. The TCT optic however is designed to be more forgiving to misalignment with less loss of quality of vision. The CTF segments allow an equal and steady light distribution in case of rotation or tilt, where the patient can still benefit from the same near and far vision.
Reducing glare and 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.
Specifications
|
Model: |
575 Precizon Presbyopic Toric |
|
Optic type: |
Aberration Negative (- 0.11 μm) Continuous Transitional Focus (CTF) optic |
|
Central far zone size Y/X: |
1.4 / 2.6 mm |
|
Rotated segment width: |
0.60 mm |
|
Number of segment rings: |
3 n |
|
Refractive Index: |
1.46 |
|
Abbe number: |
47 |
|
Optic powers: |
Sphere: +5.0 D to + 34.0 D (0.5 D increments) * / ** |
|
Haptic configuration: |
Open modified C-loops with offset shaped haptics |
|
Lens material: |
Hybrid hydrophobic & hydrophilic monomers. Ultraviolet filtering HEMA/EOEMA copolymer |
|
Lens color: |
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: |
118.3 |
|
A-constant optical: |
118.8 (SRK T) |
|
Light distribution: |
40/60 near/far |
* The minimum Sphere power is 1.5 + C e.g. 575A107TY10 = S5.0 & C3.5 (1.5+3.5=5.0)
** The maximum Sphere power is 35 - C e.g. 575A111TY59 = S29.5 & C5.5 (35-5.5=29.5)
Features and benefits Downloads
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Precizon Family Brochure
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Precizon Presbyopic Toric Factsheet
-
Precizon Patient Brochure
Publications
-
2021
crstodayeurope.com/articles/2021-oct/precizon-presbyopic-and-presbyopic-toric/
Javier Mendicute MD, PHD. Insert to cataract & refractive surgery Today Europe.
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2021
https://theophthalmologist.com/subspecialties/premium-precision-for-presbyopia
Prof. Youngsub Eom. Article on TheOphthalmologist.com.
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