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Alsafit trifocal toric vf product - návod k použití

Alsafit trifocal toric VF

A New Premium Option For Presbyopia Correction
Today the market offers laser procedures and different lens options for presbyopia correction, and multiple new technologies are being explored.
With the evolving IOL technology, patients can expect spectacle independence at a wider range of distances than ever before with IOLs that provide additional focal points and those that reduce unwanted visual effects. When it comes to offering a full range of vision, Trifocal IOLs are the unique available solution. A global vision become a fundamental need for active patients.
ALSAFIT Trifocal is a new generation of multifocal lenses providing an optimal UV and violet protection without compromising the circadian rhythm of the patient. In addition to having 3 points of focus, the lens is pupil-independent and reduced glare and halos.


3 POINTS OF FOCUS GLOBAL VISION

Total Light Transmission 87.6%

(Light splitting structure of transmitted light in 6 mm aperture)

Treat Cataract with Precise Astigmatism Correction in a Single Procedure

Many patients with cataracts have clinically significant corneal astigmatism. Studies report that 15–29% of patients with cataracts have >1.5 dioptres (D) of refractive astigmatism. 1-2 For cataract patients with regular astigmatism, toric IOLs are the potential solution for better uncorrected visual acuity than they have ever had. For every degree of error in a toric IOL’s rotational alignment, there is a 3.3 percent decrease in the correction of astigmatism, as reported. Thus, a misalignment by 10 degrees, means a 33 percent loss of the toric correction. Toric IOLs were introduced in the 1990s, and newer designs offer today a rotational stability and a better management of corneal astigmatism, leading to spectacle independence for increasing numbers of cataract surgery patients.


CERTAIN CRITERIAS FOR SUCCESSFUL SURGERY CORRECTING ASTIGMASTISM

ALSANZA BIO-POLYMERS, A COMPLETE OFFER
ALSANZA Hydrophilic Biomaterial: A Copolymer with an Hydrophobic Behavior

ALSANZA material is a co-polymer made on a methacrylate basis. One of the co-monomer is an hydrophilic monomer (2-Hydroxyethylmethacrylate). The second monomer used is a pure hydrophobic monomer (2-ethoxyethylmethacrylate) with large hydrophobic ester chain. The benefit of adding this hydrophobic monomer in the formulation is that we confer the polymer an hydrophobic behavior, by reducing the water content.

Advantages of This Unique Material:

This hydrophobic behavior is clearly demonstrated by the Contact Angle Measurements which shows comparable values versus other hydrophobic polymers. The contact angle1 measurement for our material is 70% +/-1%. If you compare contact angle for a pure hydrophilic material it’s generally around 50/54°.

Available as “Natural Yellow” our “VF” line

ALSANZA range of VF IOLs (Violet Light Filtering IOLs) are of a yellow tint comparable to a young human crystalline lens. The chemically inbound chromophore allows to block dangerous UVA and reduces the transmitted Violet light in the wavelength of 400-440 nm to protect retina without blocking the safely blue light, without modifying the natural circadian rhythms, without affecting color perception neither contrasts.

Premium Aspheric Optic Concept

ALSANZA IOLs are built on the Liou & Brennan1 (LBE) eye model, considered to be as the most anatomically accurate eye model in ophthalmology today. In Liou & Brennan eye model, spherical aberrations are of + 0,27 μm for a pupillary diameter of 6 mm. The optical model of Liou & Brennan places the young phakic eye in a realistic physiol ogical environment, taking into account for example the natural decentration of the pupil in nasal and the tilt of the visual axis vs the optical axis.
This aberration correcting asphericity concept provides reproducibility and high refractive outcomes. It provides contrast sensitivity even under low light conditions.
ALSANZA aspheric IOLs respect the natural quantity of spherical aberrations to offer pseudophakic eye visual performance close to the natural phakic eye. They improve image quality compared to spherical IOLs, they provide high contrast sensitivity for a very large range of spatial frequencies and this, particularly in difficult visual conditions as low light with a large pupil or in case of slight decentration or tilt of the IOL.




Improved Visual Performance with High MTF Values

Enhanced optic design of ALSANZA IOLs provides superior MTF values and perfect surface topography. ALSANZA Optics are built on the Modulation Transfer Function (MTF), the optical reference in measuring visual performance and contrast sensitivity. MTF gives a precise measurement of image degradation, and quantify the way an optic aberration affects the contrast perception for each spatial frequency.
Corrected aberrations on the lens -0.165µm Average residual aberration on the eye +0.165µm

Benefits of Premium Aspheric Optic Concept
360° Square Edge and Reliable Design

ALSANZA IOLs are designed to providerefractive predictability, long term stability and centration. The 360° Square Edge concept of ALSANZA IOLs creates barrier against PCO or cell migration. Continuous 360° square edges: a demonstrated efficiency for several decades. Prevention of posterior capsular opacification is an important component of the global patient satisfaction, even more, when patients are implanted with a premium IOL as a toric or as a multifocal. All ALSANZA models of IOLs have continuous 360° square edges to delay LEC proliferation and maintain a good quality of vision as long as possible. Several publications among with Dr Nishi’s1 one, have demonstrated the efficacy of 360° square edges in delaying PCO occurence.
MICS capable, ALSANZA IOLs can be implanted through 1.8 mm incision with our ALSAJET Injection system. ALSANZA IOLs are designed to be used in micro-incision cataract surgery (MICS).

Benefit of MICS: