Confounding sizing in posterior chamber phakic lens selection due to white-to-white measurement bias

Please use this identifier to cite or link to this item:
Información del item - Informació de l'item - Item information
Title: Confounding sizing in posterior chamber phakic lens selection due to white-to-white measurement bias
Authors: Fernández, Joaquín | Rodríguez-Vallejo, Manuel | Martínez, Javier | Tauste Francés, Ana | Hueso, Elisa | Piñero, David P.
Research Group/s: Grupo de Óptica y Percepción Visual (GOPV)
Center, Department or Service: Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía
Keywords: Agreement | Posterior chamber phakic intraocular lens | Reproducibility | Sizing | White-to-white
Knowledge Area: Óptica
Issue Date: 18-Feb-2019
Publisher: Wolters Kluwer - Medknow
Citation: Indian Journal of Ophthalmology. 2019, 67(3): 344-349. doi:10.4103/ijo.IJO_613_18
Abstract: Purpose: To assess the agreement in the white-to-white (WTW) measurement with two different devices, the reproducibility and the probability of confusing sizing (PCS) in selecting a different implantable collamer lens (ICL). Study Design: Retrospective observational case series. Methods: Images of 192 eyes were captured with both devices. The WTW was measured automatically (OA) and manually (OM) with the Orbscan and Keratograph (KA and KM) by one examiner who repeated a total of four measures. A second examiner conducted a single manual measure for each device over the same image. The ICL sizing was computed for each measure of WTW and the PCS was calculated as the percentage of cases for which the confronted or repeated measure resulted in a different size of the ICL. The critical WTWs with highest PCS were identified. Results: KM overestimated the WTW versus OM in 0.13 ± 0.18 mm (P < 0.001) but not in the automated method comparison, 0.01 ± 0.19 mm (P = 0.58). Inter-examiner reproducibility (R) was higher with OM than with KM, and the intra-examiner R decreased with the average of two measures in both cases. The PCS was higher with the increase of mean differences, the limits of agreement (LoAs), and R. WTWs from 11.1 to 11.2 mm, 11.6 to 11.7 mm, and 12.3 to 12.4 mm resulted in higher PCS. Conclusion: The mean difference is not enough to apply conversions between devices and the LoAs and R should be considered. Special attention should be taken for WTWs with higher PCS.
ISSN: 0301-4738 (Print) | 1998-3689 (Online)
DOI: 10.4103/ijo.IJO_613_18
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2019 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 4.0 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.
Peer Review: si
Publisher version:
Appears in Collections:INV - GOPV - Artículos de Revistas

Files in This Item:
Files in This Item:
File Description SizeFormat 
Thumbnail2019_Fernandez_etal_IndianJOphthalmol.pdf1,06 MBAdobe PDFOpen Preview

This item is licensed under a Creative Commons License Creative Commons