Optical metrology for immersed diffractive multifocal ophthalmic intracorneal lenses

P. Tankam; T. Lépine; F. Castignoles; P. Chavel

doi:10.2971/jeos.2012.12037

Journal of the European Optical Society - Rapid publications, Vol 7 (2012)

Optical metrology for immersed diffractive multifocal ophthalmic intracorneal lenses

P. Tankam, T. Lépine, F. Castignoles, P. Chavel

Abstract

This paper deals with the optical characterization of diffractive multifocal Intra-Corneal Lenses (ICLs) that we have developed in order to correct presbyopia. These diffractive multifocal lenses are made of a very soft material (permeable to oxygen and nutrients), with a thickness smaller than 100 µm and require liquid immersion. As a consequence, most of the conventional metrology methods are unsuited for their characterization. We developed specific setups to measure diffractive efficiencies and Modulation Transfer Function (MTF) adapted to such components. Experimental results are in good agreement with Zemax® simulations. For the best of our knowledge, it is the first time that optical characterization is devoted to the ICLs. Furthermore, most of the IOL’s optical characterizations are focused on far vision MTF and don’t assess the near vision MTF, which we study in this paper.

Full Text: PDF

Citation Details

Cite this article

References

J. A. Davison, and M. J. Simpson, "History and development of the apodized diffractive intraocular lens," J. Cataract Refr. Surg. 32(5), 849-858 (2006).

M. J. Simpson, "Diffractive multifocal intraocular lens image quality," Appl. Optics 32(19), 3621-3626 (1992).

A. L. Cohen, "Diffractive bifocal lens designs," Optom. Vis. Sci. 6, 461-468 (1993).

F. Castignoles, M. Flury, T. Lépine, "Comparison of the efficiency, MTF and chromatic properties of four diffractive bifocal intraocular lens designs," Opt. Express, 18(5), 5245-5256 (2010).

C. Vergès, "Understanding multifocal halos," in Mastering refractive IOLs: the art and science, D. F. Chang, ed., 267-272 (SLACK incorporated, New Jersey, 2008).

K. L. Waltz, "Understanding multifocal halos," in Mastering refractive IOLs: the art and science, David F. Chang, ed., 273-277 (SLACK incorporated, New Jersey, 2008).

M. Bass, Handbook of Optics Volume II - Devices, Measurements and Properties (Second Edition, McGraw-Hill, New York, 1995).

J. Primot, "Theoretical description of Shack-Hartmann wave-front sensor," Opt. Commun. 222, 81-92 (2003).

S. Velghe, J. Primot, N. Guérineau, M. Cohen, and B. Wattellier, "Wave-front reconstruction from multidirectional phase derivatives generated by multilateral shearing interferometers," Opt. Lett. 30, 245-247 (2005).

F. Castignoles, T. Lépine, P. Chavel, and G. Cohen, "Shack- Hartmann multiple spots with diffractive lenses," Opt. Lett. 36(8), 1422-1424 (2011).

W. Zhang, K. Aljasem, H. Zappe and A. Seifert, "Completely integrated, thermo-pneumatically tunable microlens," Opt. Express 19(3), 2347-2362 (2011).

V. P. Koronkevich, G. A. Lenkova, V. P. Korol'kov, and I. A. Iskakov, "Bifocal diffraction-refraction intraocular lenses," J. Opt. Technol. 74(12), (2007).

ISO 11979-2:1999 Ophthalmic implants - Intraocular lenses - Part 2: Optical properties and test methods (DIN Deutsches Institut für Normung e. V., Berlin, 2000).

W. A. Maxwell, S. S. Lane, and F. Zhou, "Performance of presbyopia-correcting intraocular lenses in distance optical bench tests," J. Cataract Refr. Surg. 35(1), 166-171 (2009).

ppt2txt.com/r/5f5cb268/