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FEWER STEPS - MORE VISION
Type:
Single-piece trifocal IOL for implantation into the capsular bag
Powers:
+8.0 D → +35.0 D (0.5 D steps)
Addition (at the IOL plane):
+3.5 D near
+1.75 D intermediate
+1.75 D intermediate
Material:
Copolymer of hydrophobic and hydrophilic monomers with 25% water content, UV absorber and Natural Yellow filter
RI:
1.46
Abbe No:
58
Optic Diameter:
6 mm
Overall Diameter:
13 mm
Optic Design:
Aspheric - Aberration Neutral
Biconvex (+8.0 D → +35.0 D)
Biconvex (+8.0 D → +35.0 D)
Nominal A-constant:
118.9
Diffractive Zone:
3 mm diameter diffractive array on the anterior surface utilizing EPS technology
Haptic Design:
Posterior vaulting fenestrated C-loop design with 0° angulation
PCO Prevention:
360° Special Square Edge (patented)
Estimated Incision Size:
1.8 - 2.2 mm
Shelf Life:
5 years after sterilization
Recommended Injector:
+8.0D → +29.5D: MEDJET MB1.8
+8.0D → +35D: MEDJET MA2.2
+8.0D → +35D: MEDJET MA2.2
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Light Scattering
Light is scattered within an IOL by every diffractive step.
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Considerable additional light scattering is caused by the manufactured imperfections of these steps on multiple points.
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Therefore not only the quality but also the quantity of the manufactured steps has a great impact on light scattering and loss of light energy.
Figure 1a and 1b demonstrate the difference in light scattering and energy loss on two separate diffractive IOL profiles:
Figure 1a: Light scattering caused by 16 diffractive steps.
EPS* technology uses only 7 rings within a 3 mm diameter, leaving 75% of the IOL optic refractive.
Figure 1b: LIBERTY optic with 7 diffractive steps. Moderate light scattering.
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7 Steps to Trifocal Perfection
LIBERTY provides the highest light distribution:
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AT NEAR in photopic conditions
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AT FAR in scotopic conditions
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Leaving an optimal amount of light energy for INTERMEDIATE VISION:
* Based on Zemax simulation results, PMTF calculation method and on Strehl ratio calculated from Zemax simulated MTF values.