Innovative technologies

Shperical aberration

The lens geometry has been developed to induce a specific negative spherical aberration value: -0.26μm which exactly compensates for corneal spherical aberration(1, 2) by bringing the patient’s eye to the condition of a young, emmetropic eye. (3, 5, 5, 6)

 

Glare Stop Barrier

Md Tech IOLs have a Glare Stop Barrier Filter. This particular treatment of the edge of the IOL allows to avoid the formation of glares (7, 8, 9) that deteriorate the quality of vision.

Natural Yellow®

I-STREAM has an innovative filter called NATURAL YELLOW. The IOL is light yellow pigmented, less brilliant compared with traditional ones. This new filter guarantees an efficient filtration of the harmful blue light that doesn't reach the retina (15, 16, 17), without altering: color(18) perception and contrast(19)® sensivity.

Note

1. Atchison D.A., Markwell E.L. Aberration of emmetropic subjects at different ages. Vision Researche , 48,2224 -2231, 2008.
2. Atchison D.A., Markwell E.L., Kasturirangan S., Pope J.M., Smith G. & Swann P.G. Age related changes in optical and biometric characteristics
of emmetropic eyes. Journal of Vision, 8 (4):29, 1-20, 2008.
3. Berrio E., Tabernero J., Artal P. Optical aberrations and alignment of the eye with age. Journal of vision, 10(14):34, 1-17, 2008.
4. Athalde H.V., Campos M. Costa C. Study of ocular aberrations with age. Arg Bras Oftalmol. 2009Sep-Oct;72 (5);617-21.
5. Amano S., Amano Y., Yamagami S., Miyai T., Miyata K., Sameljima T., Oshika T., Age-related changes in corneal and ocular higher order
wavefront aberrations. Am J Ophtalmol. 2004 Jun;137 (6): 988-92.
6. Wang L., Dai E., Koch DD., Nathoo A. Optical aberrations of the human anterior cornea. J Cataract Refract Surg. 2003 Aug; 29(8): 1514-21.
7. Welch NR., Gregori N., Zabriskie N. et al. Satisfaction and dysphotopsia in the pseudophakic patient. Can J Ophtalmology. 2010 Apr; 45 (2): 140-3.
8. Jin Y., Zabriskie N., Olson RJ. Dysphotopsia outcomes analysis of two truncated acrylic 6.0mm intraocular optic lenses. Ophtalmologica, 2009;
223(1):47-51. Epub 2008 Nov 6.
9. Davison JA., Positive and negative dysphotopsia in patients with acrylic intraocular lense. J Cataract Refract Surg. 2000 Sep; 26(9): 1346-55.
15. Kernt M, Hirneiss C, Neubauer AS, Lackerbauer CA, Eibl KH, Wolf A, Ulbig M, Kampik A. [Protective effect of blue light-absorbing IOLs on the human retinal pigment epithelium]. Ophthalmologe. 2010 Feb;107(2):150-7.
16. Wohlfart C, Tschuschnig K, Fellner P, Weiss K, Vidic B, El-Shabrawi Y, Ardjomand N. [Visual function with blue light filter IOLs]. Klin Monbl Augenheilkd. 2007 Jan;224(1):23-7.
17. Chew EY, Sperduto RD, Milton RC, Clemons TE, Gensler GR, Bressler SB, Klein R, Klein BE, Ferris FL 3rd.Risk of advanced age-related macular degeneration after cataract surgery in the Age-Related Eye Disease Study: AREDS report 25.
Ophthalmology. 2009 Feb;116(2):297-303. Epub 2008 Dec 16.
18. Hammond BR, Renzi LM, Sachak S, Brint SF. Contralateral comparison of blue-filtering and non-blue-filtering intraocular lenses: glare disability, heterochromatic contrast, and photostress recovery. Clin Ophthalmol. 2010 Dec 8;4:1465-73.
19. Gray R, Perkins SA, Suryakumar R, Neuman B, Maxwell WA. Reduced effect of glare disability on driving performance in patients with blue light-filtering intraocular lenses. J Cataract Refract Surg. 2011 Jan;37(1):38-44.
20. Artigas JM, Felipe A, Navea A, Artigas C, García-Domene MC. Spectral transmittance of intraocular lenses under natural and artificial illumination: criteria analysis for choosing a suitable filter. Ophthalmology. 2011 Jan;118(1):3-8.