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Materials 2015, 8(9), 6309-6325; doi:10.3390/ma8095305

Aspherical Lens Design Using Genetic Algorithm for Reducing Aberrations in Multifocal Artificial Intraocular Lens

Department of Electrical Engineering, National Formosa University, Yunlin 632, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Teen-Hang Meen
Received: 5 June 2015 / Revised: 27 August 2015 / Accepted: 8 September 2015 / Published: 17 September 2015
(This article belongs to the Special Issue Selected Papers from ICASI 2015)
View Full-Text   |   Download PDF [2041 KB, uploaded 17 September 2015]   |  

Abstract

A complex intraocular lens (IOL) design involving numerous uncertain variables is proposed. We integrated a genetic algorithm (GA) with the commercial optical design software of (CODE V) to design a multifocal IOL for the human eye. We mainly used an aspherical lens in the initial state to the crystalline type; therefore, we used the internal human eye model in the software. The proposed optimized algorithm employs a GA method for optimally simulating the focusing function of the human eye; in this method, the thickness and curvature of the anterior lens and the posterior part of the IOL were varied. A comparison of the proposed GA-designed IOLs and those designed using a CODE V built-in optimal algorithm for 550 degrees myopia and 175 degrees astigmatism conditions of the human eye for pupil size 6 mm showed that the proposed IOL design improved the spot size of root mean square (RMS), tangential coma (TCO) and modulation transfer function (MTF) at a spatial frequency of 30 with a pupil size of 6 mm by approximately 17%, 43% and 35%, respectively. However, the worst performance of spherical aberration (SA) was lower than 46%, because the optical design involves a tradeoff between all aberrations. Compared with the traditional CODE V built-in optimal scheme, the proposed IOL design can efficiently improve the critical parameters, namely TCO, RMS, and MTF. View Full-Text
Keywords: intraocular lens; third-order aberrations; anterior lens; posterior lens; genetic algorithm; optimization intraocular lens; third-order aberrations; anterior lens; posterior lens; genetic algorithm; optimization
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yen, C.-T.; Jin, S.-C. Aspherical Lens Design Using Genetic Algorithm for Reducing Aberrations in Multifocal Artificial Intraocular Lens. Materials 2015, 8, 6309-6325.

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