Preliminary validation of an optimized algorithm for intraocular lens power calculation in keratoconus
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Título: | Preliminary validation of an optimized algorithm for intraocular lens power calculation in keratoconus |
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Autor/es: | Camps, Vicente J. | Piñero, David P. | Caravaca Arens, Esteban | Fez Saiz, Dolores de |
Grupo/s de investigación o GITE: | Grupo de Óptica y Percepción Visual (GOPV) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía |
Palabras clave: | Cataract surgery | Intraocular lens power | Keratoconus | Keratometric index | Keratometry |
Área/s de conocimiento: | Óptica |
Fecha de publicación: | ago-2017 |
Editor: | Wolters Kluwer - Medknow |
Cita bibliográfica: | Indian Journal of Ophthalmology. 2017, 65(8): 690-699. doi:10.4103/ijo.IJO_274_16 |
Resumen: | This study aimed to evaluate the theoretical influence on intraocular lens power (PIOL) calculation of the use of keratometric approach for corneal power (Pc) calculation in keratoconus and to develop and validate an algorithm preliminarily to minimize this influence. Methods: Pcwas calculated theoretically with the classical keratometric approach, the Gaussian equation, and the keratometric approach using a variable keratometric index (nkadj) dependent on r1c(Pkadj). Differences in PIOL calculations (ΔPIOL) using keratometric and Gaussian Pcvalues were evaluated. Preliminary clinical validation of a PIOLalgorithm using Pkadj was performed in 13 keratoconus eyes. Results: PIOL underestimation was present if Pc was overestimated, and vice versa. Theoretical PIOLoverestimation up to −5.6 D and −6.2 D using Le Grand and Gullstrand eye models was found for a keratometric index of 1.3375. If nkadjwas used, maximal Δ PIOL was ±1.1 D, with most of the values ≤±0.6 D. Clinically, PIOLunder- and over-estimations ranged from −1.1 to − 0.4 D. No statistically significant differences were found between PIOL obtained with Pkadjand Gaussian equation (P > 0.05). Conclusion: The use of the keratometric Pcfor PIOL calculations in keratoconus can lead to significant errors that may be minimized using a Pkadj approach. |
Patrocinador/es: | The research leading to these results has received funding from the Generalitat Valenciana (Valencian Community, Spain) under the grant for emergent research groups with reference GV2014/086. |
URI: | http://hdl.handle.net/10045/73738 |
ISSN: | 0301-4738 (Print) | 1998-3689 (Online) |
DOI: | 10.4103/ijo.IJO_274_16 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2017 Indian Journal of Ophthalmology | Published by Wolters Kluwer - Medknow. This is an open access article distributed under the terms of the Creative Commons Attribution‑NonCommercial‑ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non‑commercially, as long as the author is credited and the new creations are licensed under the identical terms. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.4103/ijo.IJO_274_16 |
Aparece en las colecciones: | INV - GOPV - Artículos de Revistas |
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