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

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.

Visual Performance, Subjective Satisfaction and Quality of Life Effect of a New Refractive Intraocular Lens with Central Extended Depth of Focus

“…Amongst the most researched properties are the capacities to achieve spectacle independence and optimal visual acuity regardless of focal lengths and light conditions, as well as the reduction of visual aberrations [2]. A wide range of designs and optical properties were developed in an attempt to achieve this, including refractive, diffractive, refractivediffractive, and apodized diffractive multifocal IOLs [3,4].…”

Freeform Surface Lens Design Using Genetic Algorithm with Acrylic Material for Reducing Aberrations in Multifocal Artificial Intraocular Lens to Enhance Image Sensing Quality

“…Over generations, organisms thus can adapt to the environment given stable growth conditions. (19)(20)(21) The GA technique is applied to the optical design of the artificial IOL. The advantages of integrating the GA optimization process with the optical design are the obtention of the overall physical artificial crystal with better focusing function and higher flexibility.…”

Genetic algorithms for lens design: a review

“…• Systematic method used to optimize an optical design for a LED lens module Chen et al [50] Continued on next page 2014 • GAs used to optimize optical systems Neda HesamMah-moudiNezhad [17] 2015 • Investigation of the influence of aberrations on contact lenses and a hybrid neural-GA was used to optimize the aspherical lens design of myopic and astigmatic eyes Yen and Ye [10] • GA used to design a multifocal IOL design for the human eye Yen and Jin [11] • Hybrid genetic algorithm used to improve field curvature aberration in optical lenses Tsai and Fang [12]…”

“…Yen and Jin applied efficiently a GA on aspherical lens design to reduce aberrations in multifocal artificial intraocular lenses (IOL) [10,11]. They inserted a GA by mimicking the variation of thickness and curvature of the human eye into the optical software CODE V to create an IOL design.…”

“…Its random nature is utilised to improve the search for a global solution [9]. Since 2015, several researchers have applied the hybrid-GA to lens design [10,11,12]. These kinds of GAs can be effectively applied to real-world problems, and contain other techniques within their frameworks.…”