Base Information
Volume
V50 - N1 / 2017 Ordinario
Reference
63-73
DOI
http://doi.org/10.7149/OPA.50.1.49508
Language
Spanish
Keywords
Intraocular lenses, optical quality, cataract, vision
Abstract
The optical characterization of an intraocular lens (IOL) provides objective and quantitative information that is essential to fully understand its performance as an implant that replaces the crystalline lens in the human visual system. Additionally, it can be used to predict the performance of the new IOL designs. This characterization has to be carried out using in vivo tests in implanted patients and in vitro, by means of an optical bench or theoretical simulations. This thesis begins with an analysis of the main sources of uncertainty in the calculation of the IOL power and explores the compensation of the residual refractive errors by using some unconventional degrees of freedom. The thesis focuses on the in vitro characterization of a variety of commercially available IOLs (monofocal, multifocal, spherical, aspherical, apodized, full-aperture, and of different materials, powers and additions) in optical bench. To this end, we have designed and implemented the necessary methods of measurement and an experimental setup that, according to the international standard regulation, reproduces the conditions of such implants in the human eye. We have developed a method to measure the energy efficiency of IOLs. This method has allowed us to explain the clinical results obtained in the evaluation of the stereoscopic acuity when using two tests based on different principles. The optical imaging quality of IOLs has been basically quantified through the experimental measurement of the modulation transfer function. We have developed and implemented a method to characterize some artefact, named halo, which can be perceived by those patients implanted with multifocal IOLs. Finally, all the experimental results have been used as a basis for the inter-class comparison of the IOL performances.
References
F. Alba-Bueno, M.S. Millán, Defocus correction in the optical system of the eye: unconventional degrees of freedom. Jounal of Biomedical Optics 16,1,016010 (2011). DOI
F. Alba-Bueno, F. Vega, M.S. Millán, Desing of a Test Bench for Intraocular Lens Optical Characterization. Journal of Physics: Conference Series: 274,012105 (2011). DOI
F. Vega, M.S. Millán, B. Wells, Spherical lens versus aspheric artificial cornea for intraocular lens testing. Optics letters 35,1539-1541 (2010) DOI
M.S. Millán, F. Alba-Bueno, F. Vega, New trends in intraocular lens imaging. Proc SPIE 80119I (2011) DOI
F. Alba-Bueno, F. Vega, M.S. Millán, Halos en LIOs multifocales: Origen e interpretación. Archivos de la Sociedad Española de Oftalmología 89, 397-404 (2014) DOI
F. Vega, F. Alba-Bueno, M.S. Millán, Energy Distribution between Distance and Near Images in Apodized Diffractive Multifocal Intraocular Lenses. Investigative Ophthalmology & Visual Science 52, 5695-5701(2011). DOI
F. Vega, F. Alba-Bueno, M.S. Millán, Energy efficiency of a new trifocal intraocular lens. Journal of the European Optical Society-Rapid publications 9, p14002 (2014). DOI
F. Alba-Bueno, F. Vega, M.S. Millán, Energy balance in apodized diffractive multifocal intraocular lensees. Proc SPIE, 80119G-10 (2011). DOI
F. Vega, M.S. Millán, N. Vila-Terricabras, F. Alba-Bueno, Visible versus Near-Infrared Optical Performance of Diffractive Multifocal Intraocular Lenses. Investigative Opthahlmology & Visual Science 56 7345-7351. DOI
C. Varón, M.A. Gil, F. Alba-Bueno, G. Cardona, F. Vega, M.S. Millán, J.A. Buil, Stereo-acuity in patients implanted with multifocal intraocular lenses: is the choice of stereotest relevant? Current eye research 39, 711-719. DOI