Fourier Optic IOL
ALSAFIT FOURIER is a total presbyopia correcting IOL for cataract and RLE surgery procedures. By carrying a disruptive innovation in optical design, Fourier Optic is fitted out with reverse apodization in all optical zone (6mm) . This unique pattern is developed by transforming classical edged overlapping Fresnel diffraction into Fourier Optic with reverse apodization. Throughout reverse apodized Fourier Optic , it contists of 14 soft transition steps which support possessing high quality of vision at all distances regardless of lighting condition.
What is Reverse Apodization?
Reverse Apodization determines the increase in hight of the Fourier Optic diffraction lays trough central to peripheral. Height of the steps determine the quantity of energy transferred between near, intermediate and far vision. The higher the steps, the more energy delivery to near vision.
Why Reverse Apodization?
Reverse Apodization maintains continuity of balanced light distribution and continuous focus regardless of lighting conditions. Patent pending Fourier Optic with Reverse apodization features 24H Balanced Light Distribution that enables high energy distribution to near and intermediate in mesopic conditions as well as photopic. That unique design promises patients more efficent light distribution and have clear vision at all distances during daytime and nighttime.
Maximized Light Transmission
ALSAFIT FOURIER provides %91,4 Light Transmission thanks to patent pending Reverse Apodized Fourier Optic . Fourier Optic diffraction on optical area transmit large part of the light to retina by reducing reflected and scattered light. Classical sharp edged and overlapping diffractive IOLs exhibit important light loss(12 to 15 %) which has direct impact on visual performance.
24Hours Balanced Light Distribution
Increasing height of the Fourier Optic diffraction from central to peripheral on optical area provides high energy delivery to near and intermediate with the enlarging of the pupil. With 24H Balanced Light Distribution Fourier Optic IOL offers high contrast sensitivity at near, intermediate and far vision and all distances in between during daytime and nighttime
Preserving near light distributionin in conjunction with increased far light distribution facilitates a spectacle free vision and contrast sensitivity also in mesopic conditions.
Continuous Focus with Fourier Optic IOL
Profile of diffractivity has an important role in modulation result of IOLs. In comperison Fourier Optic IOL continuous to perform high MTF values at all distances . Preciously designed undulatory pattern with reverse apodization differs from other trifocal IOLs. Alsafit Fourier is the only IOL that continues to perfom high MTF values at all distances.