MINI WELL is the first progressive IOL (intra-ocular lens) with the extended aspherical depth of focus for the correction of presbyopia that is to be implanted in the posterior chamber of the eye, in the capsular sac.
The 4-lug design ensures easy calibration and excellent stability in the capsular bag (120° contact angle).
The development of the lens of the MINI WELL IOL is based on a patented engineering innovation that exploits wavefront aberrations to increase the depth of focus in order to generate a progressive multifocality (continuous focus), thus correct presbyopia.
The MINI WELL Lens is made with a copolymer that includes the components: 2-HEMA (2-hydroxyethyl-methacrylate) and EOEMA (2-ethoxyethyl-methacrylate) with a chromophore that filters ultraviolet radiation. The polymer is ultra-pure, that is free of residual acids and non ionic that excludes any possibility of opacification of the lens due to calcium deposits.
Criteria For Patient Choice
- Preferably, bilateral implant
- Patients of any sex and age
- Patients with cataracts or candidates for the intervention of RLE
- Astigmatism ≤ 0,75 D
- Mesopic pupillary diameter between 4 and 6 mm
Benefits Of IOL
- Continuous vision from near to far
- Extended depth of focus
- Excellent quality of vision
- Absence of halos and glare
- Rapid neurosensory adaptation
- Independence from the angle K
- Safety guaranteed by the preloaded mini engraving system
The optics of these new lenses have been designed on the basis of the principles of physical optics (Wavefront Optics) rather than on the basis of the principles of geometric optics, as what happens with the rest of the lenses of this type already existing on the market. In practice, instead of drawing a lens to obtain a certain effect, several sharp powers, the desired effect was studied, deformation of the wave front, and it was traced back to the shape that generates it.
In the progressive intra-ocular lens we take into account, MINI WELL by SIFI Medtech, the spherical aberrations, negligible at the center of the pupil of a real eye under normal conditions, are applied in appropriate quantities in the central areas of the appropriately defined optics.
MINI WELL is a progressive lens as it offers continuous multifocality. A limited number of focuses and working distances is a characteristic of all the other multifocal lenses on the market (refractive / diffractive). MINI WELL does not have a discrete number of powers but a continuum of them, that is a single fire with great depth, which depends on the innovative optics (use of spherical aberrations in the center).
The presence of a continuum of focuses positively influences the performance of this lens, which guarantees a good vision from afar, intermediate, and close.
Based on the “Progressive” IOL: A New Reality by Giovanni Alessio, Alessandra Sborgia, Carmela Palmisano – The Italian Oculist
Bibliography
1. Mita N, Hatsusaka N, Shibuya E, et al. Change In Retinal Image Contrast With Age In eyes With Transparent Lenses.J Cataract Refract Surg. 2012 Oct;38(10):1783-7.
2. Chen L, Artal P, Gutierrez D, et al. Neural Compensation For The Best Aberration Correction.J Vis. 2007 Jul 23;7(10):9.1-9.
3. Artal P, Chen L, Fernández EJ, et al. Neural Compensation For The Eye’s Optical Aberrations. J Vis. 2004 Apr 16;4(4):281-7.
4. Can MG, Oner BB, Kurt H. Optical Analysis Of human Eye Using Electromagnetic Wave Theory.J Biomed Opt. 2013;18(10).
5. Thibos LN, Bradley A, Liu T, et al. Spherical Aberration And The Sign Of Defocus. Optom Vis Sci. 2013 Nov;90(11):1284-91.
6. Yuan Y, Shao Y, Tao A, et al. Ocular Anterior Segment Biometry And High-Order Wavefront Aberrations During Accommodation. Invest Ophthalmol Vis Sci. 2013 Oct 25;54(10):7028-37.
7. Thibos LN, Bradley A, López-Gil N. Modelling The Impact Of Spherical Aberration On Accommodation. Ophthalmic Physiol Opt. 2013 Jul;33(4):482-96.
8. López-Gil N, Martin J, Liu T, et al. Retinal Image Quality During Accommodation. Ophthalmic Physiol Opt. 2013 Jul;33(4):497-507.
9. Sawides L, de Gracia P, Dorronsoro C, et al. Vision Is Adapted To The Natural Level Of Blur Present In The Retinal Image. PLoS One. 2011;6(11):e27031.
