Predicting the performance of accommodating intraocular lenses using ray tracing

Journal of Cataract and Refractive Surgery
Arthur HoJean-Marie Parel

Abstract

To predict and compare the amount of accommodation achievable by pseudophakic accommodating intraocular lenses (IOLs) using optical ray-tracing analysis. Computational laboratory. Two-element IOLs (2E-IOL, with mobile front or back optical elements) were compared with single-element IOLs (1E-IOL). Modeling using computer-assisted ray tracing of both IOL types assumed lens elements were equiconvex/equiconcave. The 4 possible combinations of configurations representing a wide range of varying positive and negative power (up to +40 diopters [D]) of front and back optical elements were evaluated. The 1E-IOLs offered limited amplitude of accommodation with axial shift (approximately 1.2 D/mm). For 2E-IOLs, configurations with high positive-power front elements returned the best amplitude of accommodation (up to approximately 3.0 D/mm when the front element power was +40 D). Considering the maximum potential amounts of axial shifts available, 1E-IOLs were predicted to provide 1.0 D of accommodation or less and 2E-IOLs were predicted to provide up to 3.0 D to 4.0 D depending on design configuration and amount of axial shift achievable. Potential issues relating to accommodative aniseikonia and spherical aberration have been identified.

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Citations

Apr 26, 2011·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Jit B AleArthur Ho
May 7, 2010·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Jit AleArthur Ho
Jul 16, 2010·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Leon N DaviesJames S Wolffsohn
Nov 9, 2010·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Jit B AleArthur Ho
Feb 16, 2013·F1000 Medicine Reports·Daniel KookThomas Kohnen
Feb 2, 2011·Journal of Biomedical Optics·Jui-Teng LinQiushi Ren
Dec 2, 2006·Journal of Cataract and Refractive Surgery·J T Lin
May 11, 2012·Biomedical Optics Express·Huanqing GuoChris Dainty
Jun 15, 2007·Current Opinion in Ophthalmology

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