SPATIAL-ENERGY CHARACTERISTICS OF THE FOCAL REGIONS OF BIFOCAL DIFFRACTIVE-REFRACTIVE INTRAOCULAR LENSES
G. A. Lenkova
Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Koptyuga 1, Novosibirsk 630090
Keywords: дифракционно-рефракционный хрусталик глаза, интраокулярная линза, дифракционная эффективность, компьютерное моделирование, diffractive-refractive lens, intraocular lens, diffraction efficiency, computer simulation
Abstract
This paper presents the results of a computer simulation of the process of measuring the parameters of MIOL-Akkord type bifocal refractive-diffractive lenses in which the central area of the diffraction element is reduced and compensation of spherical aberrations of the eye is provided. The spatial-energy characteristics of an ideal diffractive lens is preliminarily calculated using existing formulas. The simulation of the process of controlling intraocular lens parameters showed that the intensity distribution along the optical axis does not characterize the diffraction efficiency, which is the total (integrated) intensity in the beam cross section at the focus.пIt is found that due to the coupling of diffraction orders, it is difficult to measure the absolute diffraction efficiency and it is better to evaluate only the relative efficiency.
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