Repeatability of aberrometric measurements in normal and keratoconus eyes using a new Scheimpflug–Placido topographer

Bayhan, Hasan Alı; Bayhan, Seray Aslan; Muhafız, Ersin; Can, İzzet

doi:10.1016/j.jcrs.2013.07.046

Cited by 41 publications

(36 citation statements)

References 19 publications

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“…Bayhan et al [19] reported somewhat lower level of consistency of anterior corneal aberrometric measurements using the Sirius system in normal healthy eyes (ICC from 0.568 for quadrafoil RMS to 0.856 for primary coma RMS). Similarly, Cerviño et al [2] reported a moderate to good consistency of corneal aberrometric measurements obtained in normal healthy eyes using the Galilei system.…”

Section: Discussionmentioning

confidence: 99%

Corneal Topographic and Aberrometric Measurements Obtained with a Multidiagnostic Device in Healthy Eyes: Intrasession Repeatability

Piñero

López-Navarro

Cabezos

et al. 2017

Journal of Ophthalmology

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Purpose. To evaluate the intrasession repeatability of corneal curvature, eccentricity, and aberrometric measurements obtained with a multidiagnostic device in healthy eyes. Methods. This study enrolled 107 eyes of 107 patients ranging in age from 23 to 65 years. All of them underwent a complete anterior segment examination with the VX120 system (Visionix-Luneau Technologies, Chartres, France). Three consecutive measurements were obtained. The within-subject standard deviation (Sw), intrasubject precision (1.96 × Sw), and intraclass correlation coefficient (ICC) were calculated. Results. All Sw for corneal power measurements were below 0.26 D, with ICC above 0.982. The Sw for corneal astigmatism at different areas (3, 5, and 7 mm) was below 0.21 D, with ICC above 0.913. Concerning the axis of astigmatism, its Sw was below 11.27°, with ICC above 0.975. The Sw and ICC for corneal eccentricity were 0.067 and 0.957, respectively. The Sw and ICC for high-order aberration root mean square (RMS) were 0.048 µm and 0.901, respectively. For 3rd- and 4th-order aberrometric parameters, all Sw were below 0.037 µm and all ICC were higher than 0.84, except for quadrafoil RMS (ICC: 0.689). Conclusions. The multidiagnostic device evaluated is able to provide consistent measurements of corneal power, eccentricity, and third- and fourth-order aberrations in healthy eyes.

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Section: Discussionmentioning

confidence: 99%

Corneal Topographic and Aberrometric Measurements Obtained with a Multidiagnostic Device in Healthy Eyes: Intrasession Repeatability

Piñero

López-Navarro

Cabezos

et al. 2017

Journal of Ophthalmology

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“…La desalineación se propone como otro factor que influye, aunque la obtención de las imágenes por el equipo lleva solo 2 s, se considera suficiente para afectar la variabilidad 26,33 .…”

Section: Discussionunclassified

“…Bayhan et al 33 en su publicación informan de la repetibilidad intraexaminador de alta a moderada de las mediciones de las aberraciones de superficie anterior corneal en ojos normales y con queratocono, y una moderada repetibilidad para las aberraciones de superficie posterior corneal, pero también con el topógrafo Sirius Scheimpflug---Plácido.…”

Section: Discussionunclassified

Aberraciones corneales anteriores y posteriores medidas mediante imágenes de Scheimpflug en el queratocono en niños

Reyes¹,

Díaz

Rangel

2015

Revista Mexicana de Oftalmología

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Cómo citar este artículo: Bernal Reyes N, et al. Aberraciones corneales anteriores y posteriores medidas mediante imáge-nes de Scheimpflug en el queratocono en niños. Rev Mex Oftalmol. 2015. http://dx.Recibido el 13 de octubre de 2014; aceptado el 23 de abril de 2015 PALABRAS CLAVEQueratocono; Niño; Aberrometría; Córnea ResumenObjetivo: Establecer la utilidad de las aberraciones anteriores y posteriores en niños para detección del queratocono, mediante imágenes de Scheimpflug con el Pentacam® de Oculus Método: Se realizó un estudio retrospectivo comparativo observacional a niños entre 5 y 15 años. Un grupo con córneas sanas y otro con queratocono en estadio 1 y 2. Se estudió: defecto refractivo esférico, defecto cilíndrico, AVMC, queratometría máxima, mínima y media, astigmatismo topográfico y aberraciones anteriores y posteriores. Se aplicó la prueba t de Student no pareada y la prueba de Mann-Whitney cuando no fue posible usar la anterior. Resultados: En casi todas las aberraciones de la superficie anterior excepto el coma primario y secundario horizontal, existían diferencias significativas entre los grupos. En superficie corneal posterior se hallaron diferencias significativas entre los grupos en: el coma vertical primario, aberración esférica primaria, coma y coma-like RMS. En niños con córneas sanas en superficie posterior se hallaron cifras significativas de coma vertical, aberración esférica, coma y coma-like RMS. Entre la superficie corneal anterior y posterior con queratocono se encontraron diferencias en el coma vertical, coma-RMS y coma-like RMS. * Autor para correspondencia. Correo electrónico: neisyb@horpf.sld.cu (N. Bernal Reyes).

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“…The one of highest quality was chosen for analysis. The repeatability and reliability of SIRIUS for measuring segment parameters have been demonstrated [3–5]. …”

Section: Participants and Methodsmentioning

confidence: 99%

Comparison of the Optical Quality between Small Incision Lenticule Extraction and Femtosecond Laser LASIK

Jin

Wang

et al. 2016

Journal of Ophthalmology

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Purpose. To investigate the visual quality after SMILE and Femto-LASIK. Methods. About 123 eyes from 63 patients were enrolled in this study. The parameters were measured preoperatively and 1 week, 1 month, and 3 months postoperatively using Sirius System. Results. The MTF curve increase slightly from low to high frequency at 3 mm and 6 mm pupil diameter after SMILE surgery (P < 0.05) during the follow-up time comparing with the preoperative values. And the SR has a significant increase at various pupil diameters as well (P < 0.05). However, there was little increase for MTF at intermediate to high frequency at 3 mm pupil diameter after Femto-LASIK procedure (P < 0.05). And the SR had only significant increase at 3 mm pupil diameter. Between SMILE and Femto-LASIK, there was no statistic difference both in MTF and SR (P > 0.05) at 3 mm pupil diameter at vertical and horizontal meridian. However, significant difference was found in MTF at low to mediate frequency at 6 mm pupil diameter at vertical meridian at 1 week postoperatively (P < 0.05). Conclusions. Both SMILE and Femto-LASIK show a great improvement in optical quality at small diameter. It was found that SMILE shows better optical quality than Femto-LASIK at larger pupil diameter, which might be good for the night vision.

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Repeatability of aberrometric measurements in normal and keratoconus eyes using a new Scheimpflug–Placido topographer

Abstract: No author has a financial or proprietary interest in any material or method mentioned.

Cited by 41 publications

References 19 publications

Corneal Topographic and Aberrometric Measurements Obtained with a Multidiagnostic Device in Healthy Eyes: Intrasession Repeatability

Corneal Topographic and Aberrometric Measurements Obtained with a Multidiagnostic Device in Healthy Eyes: Intrasession Repeatability

Aberraciones corneales anteriores y posteriores medidas mediante imágenes de Scheimpflug en el queratocono en niños

Comparison of the Optical Quality between Small Incision Lenticule Extraction and Femtosecond Laser LASIK

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