Eficacia del Orbscan II y Pentacam en la evaluación de los mapas de elevación en candidatos a cirugía refractiva mediante un análisis de repetibilidad

Núñez, María Ximena; Blanco, Claudia

doi:10.7705/biomedica.v29i3.8

biomedica

2009

DOI: 10.7705/biomedica.v29i3.8

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Eficacia del Orbscan II y Pentacam en la evaluación de los mapas de elevación en candidatos a cirugía refractiva mediante un análisis de repetibilidad

María Ximena Núñez

Claudia Blanco²

Abstract: Conclusions:Measurement of the point of maximum posterior elevation is better with the Orbscan II and less precise with the Pentacam. The random error can be reduced by using the mean of three assessments and can serve as a guide in the search of diagnostic devices with minimum absolute relative error in all measurements.

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Cited by 7 publications

References 28 publications

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Transepithelial Corneal Cross-Linking With Vitamin E-Enhanced Riboflavin Solution and Abbreviated, Low-Dose UV-A

Caruso

Ostacolo

Epstein

et al. 2016

Cornea

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Purpose:To report the clinical outcomes with 24-month follow-up of transepithelial cross-linking using a combination of a d-alpha-tocopheryl polyethylene-glycol 1000 succinate (vitamin E-TPGS)-enhanced riboflavin solution and abbreviated low fluence UV-A treatment.Methods:In a nonrandomized clinical trial, 25 corneas of 19 patients with topographically proven, progressive, mild to moderate keratoconus over the previous 6 months were cross-linked, and all patients were examined at 1, 3, 6, 12, and 24 months. The treatments were performed using a patented solution of riboflavin and vitamin E-TPGS, topically applied for 15 minutes, followed by two 5-minute UV-A treatments with separate doses both at fluence below 3 mW/cm2 that were based on preoperative central pachymetry.Results:During the 6-month pretreatment observation, the average Kmax increased by +1.99 ± 0.29 D (diopter). Postoperatively, the average Kmax decreased, changing by −0.55 ± 0.94 D, by −0.88 ± 1.02 D and by −1.01 ± 1.22 D at 6, 12, and 24 months. Postoperatively, Kmax decreased in 19, 20, and 20 of the 25 eyes at 6 months, 12 months, and 24 months, respectively. Refractive cylinder was decreased by 3 months postoperatively and afterward, changing by −1.35 ± 0.69 D at 24 months. Best spectacle-corrected visual acuity (BSCVA) improved at 6, 12, and 24 months, including an improvement of −0.19 ± 0.13 logarithm of the minimum angle of resolution units at 24 months. There was no reduction in endothelial cell count. No corneal abrasions occurred, and no bandage contact lenses or prescription analgesics were used during postoperative recovery.Conclusions:Transepithelial cross-linking using the riboflavin-vitamin E solution and brief, low-dose, pachymetry-dependent UV-A treatment safely stopped keratoconus progression.

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Transepithelial Corneal Cross-Linking With Vitamin E-Enhanced Riboflavin Solution and Abbreviated, Low-Dose UV-A

Caruso

Ostacolo

Epstein

et al. 2016

Cornea

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Repetibilidad y reproducibilidad de las medidas del espesor y curvatura corneal obtenidas mediante el Oculus Pentacam

Elizalde¹,

Roa²,

Rodríguez³

2014

Cienc. Tecnol. Salud Vis. Ocul.

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Objetivo: evaluar la repetibilidad y reproducibilidad de las medidas del espesor y curvatura corneal obtenidas con el Oculus Pentacam, de la Universidad de La Salle. Materiales y métodos: para la repetibilidad de las medidas de la curvatura y espesor corneal con el Pentacam, un solo observador realizó diez repeticiones de diez ojos, y para la reproducibilidad dos examinadores, en sesiones separadas, ejecutaron tres tomas consecutivas en ambos ojos de veinte sujetos sanos. Resultados: en repetibilidad, el coeficiente de variación de las medidas de la curvatura corneal se encontró entre 0,2 % y 0,4 % y en el caso del espesor corneal varió entre 0,7 % y 1,4 %. El coeficiente de variación interobservador, para la curvatura corneal estuvo entre 3,6 % y 4,0 %, y para el espesor corneal entre 4,9 % y 7,9 %. No se hallaron diferencias estadísticas (p > 0,05) ni clínicamente significativas entre las observaciones inter e intraobservador. El coeficiente de correlación interobservador fue mayor al 0,90 (p < 0,01). Conclusión: las medidas de la curvatura y espesor corneal obtenidas con el Oculus Pentacam son confiables, reproducibles y repetibles.

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Precision Analysis of Posterior Corneal Topography Measured by Visante Omni: Repeatability, Reproducibility, and Agreement With Orbscan II

Srivannaboon¹,

Chotikavanich²,

Chirapapaisan³

et al. 2012

J Refract Surg

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Eficacia del Orbscan II y Pentacam en la evaluación de los mapas de elevación en candidatos a cirugía refractiva mediante un análisis de repetibilidad

Cited by 7 publications

References 28 publications

Transepithelial Corneal Cross-Linking With Vitamin E-Enhanced Riboflavin Solution and Abbreviated, Low-Dose UV-A

Transepithelial Corneal Cross-Linking With Vitamin E-Enhanced Riboflavin Solution and Abbreviated, Low-Dose UV-A

Repetibilidad y reproducibilidad de las medidas del espesor y curvatura corneal obtenidas mediante el Oculus Pentacam

Precision Analysis of Posterior Corneal Topography Measured by Visante Omni: Repeatability, Reproducibility, and Agreement With Orbscan II

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