Please use this identifier to cite or link to this item: doi:10.22028/D291-41535
Title: Monte-Carlo simulation of a thick lens IOL power calculation
Author(s): Langenbucher, Achim
Szentmáry, Nóra
Cayless, Alan
Gatinel, Damien
Debellemanière, Guillaume
Wendelstein, Jascha
Hoffmann, Peter
Language: English
Title: Acta Ophthalmologica
Volume: 102 (2024)
Issue: 1
Pages: e42-e52
Publisher/Platform: Wiley
Year of Publication: 2023
Free key words: 5 surface pseudophakic model eye
linear Gaussian optics
Monte-Carlo simulation
ocular magnification
spherical equivalent refraction
thick lens cornea
thick lens IOL model
vergence calculation
DDC notations: 610 Medicine and health
Publikation type: Journal Article
Abstract: Background: The purpose of this Monte-Carlo study is to investigate the effect of using a thick lens model instead of a thin lens model for the intraocular lens (IOL) on the resulting refraction at the spectacle plane and on the ocular magnification based on a large clinical data set. Methods: A pseudophakic model eye with a thin spectacle correction, a thick cornea (curvatures for both surfaces and central thickness) and a thick IOL (equivalent power PL derived from a thin lens IOL, Coddington factor CL (uniformly distributed from −1.0 to 1.0), either preset central thickness LT=0.9mm (A) or optic edge thickness ET=0.2mm, (B)) was set up. Calculations were performed on a clinical data set containing 21 108 biometric measurements of a cataractous population based on linear Gaussian optics to derive spectacle refraction and ocular magnification using the thin and thick lens IOL models. Results: A prediction model (restricted to linear terms without interactions) was derived based on the relevant parameters identified with a stepwise linear regression approach to provide a simple method for estimating the change in spectacle refraction and ocular magnification where a thick lens IOL is used instead of a thin lens IOL. The change in spectacle refraction using a thick lens IOL with (A) or (B) instead of a thin lens IOL with identical power was within limits of around ±1.5 dpt when the thick lens IOL was placed with its haptic plane at the plane of the thin lens IOL. In contrast, the change in ocular magnification from considering the IOL as a thick lens instead of a thin lens was small and not clinically significant. Conclusion: This Monte-Carlo simulation shows the impact of using a thick lens model IOL with preset LT or ET on the resulting spherical equivalent refraction and ocular magnification. If IOL manufacturers would provide all relevant data on IOL design data and refractive index for all power steps, this would make it possible to perform direct calculations of refraction and ocular magnification.
DOI of the first publication: 10.1111/aos.15666
URL of the first publication:
Link to this record: urn:nbn:de:bsz:291--ds-415358
ISSN: 1755-3768
Date of registration: 31-Jan-2024
Faculty: M - Medizinische Fakultät
Department: M - Augenheilkunde
Professorship: M - Univ.-Prof. Dr. Dipl.-Ing. Achim Langenbucher
M - Prof. Dr. med. Nóra Szentmáry
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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