Algorithm for Correcting the Keratometric Error in the Estimation of the Corneal Power in Keratoconus Eyes after Accelerated Corneal Collagen Crosslinking
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Título: | Algorithm for Correcting the Keratometric Error in the Estimation of the Corneal Power in Keratoconus Eyes after Accelerated Corneal Collagen Crosslinking |
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Autor/es: | Piñero, David P. | Camps, Vicente J. | Caravaca Arens, Esteban | Fez Saiz, Dolores de | Blanes Mompó, Francisco J. |
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: | Keratometric error | Corneal power calculation | Keratoconus eyes | Accelerated corneal collagen crosslinking |
Área/s de conocimiento: | Óptica |
Fecha de publicación: | 22-oct-2017 |
Editor: | Hindawi Publishing Corporation |
Cita bibliográfica: | Journal of Ophthalmology. Volume 2017 (2017), Article ID 8529489, 8 pages. doi:10.1155/2017/8529489 |
Resumen: | Purpose. To analyze the errors associated to corneal power calculation using the keratometric approach in keratoconus eyes after accelerated corneal collagen crosslinking (CXL) surgery and to obtain a model for the estimation of an adjusted corneal refractive index (nkadj) minimizing such errors. Methods. Potential differences (ΔPc) among keratometric (Pk) and Gaussian corneal power (PGauss c ) were simulated. Three algorithms based on the use of nkadj for the estimation of an adjusted keratometric corneal power (Pkadj) were developed. The agreement between Pk(1.3375) (keratometric power using the keratometric index of 1.3375), PGauss c , and Pkadj was evaluated. The validity of the algorithm developed was investigated in 21 keratoconus eyes undergoing accelerated CXL. Results. Pk(1.3375) overestimated corneal power between 0.3 and 3.2D in theoretical simulations and between 0.8 and 2.9D in the clinical study (ΔPc). Three linear equations were defined for nkadj to be used for different ranges of r1c. In the clinical study, differences between Pkadj and PGauss c did not exceed ±0.8D nk = 1.3375. No statistically significant differences were found between Pkadj and PGauss c (p > 0 05) and Pk(1.3375) and Pkadj (p < 0 001). Conclusions. The use of the keratometric approach in keratoconus eyes after accelerated CXL can lead to significant clinical errors. These errors can be minimized with an adjusted keratometric approach. |
URI: | http://hdl.handle.net/10045/70330 |
ISSN: | 2090-004X (Print) | 2090-0058 (Online) |
DOI: | 10.1155/2017/8529489 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2017 David P. Piñero et al. 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. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1155/2017/8529489 |
Aparece en las colecciones: | INV - GOPV - Artículos de Revistas |
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