Comparison of the measurement of central corneal thickness measured by a new device of tomography with Scheimpflug camera and Placido rings (Sirius®) and ultrasonic pachymetry in healthy subjects,Comparación de la medición del grosor corneal central medido con un nuevo equipo de tomografía con cámara de Scheimpflug y anillos de Plácido (Sirius®) y paquimetría ultrasónica en sujetos sanos

Manuel Garza-León, Paola de la Parra-Colín, Tonatiuh Barrientos-Gutierrez

Research output: Contribution to journalArticle

Abstract

© 2015 Sociedad Mexicana de Oftalmología. Objective: To assess the repeatability and comparability of the central corneal thickness measurements obtained from a novel Scheimpflug camera with a Placido-disc topographer (Sirius®) and ultrasound pachymetry. Material and methods: In a sample of thirty unoperated eyes of healthy subjects, the central corneal thickness was analyzed by a single examiner using the Sirius® and the ultrasound pachymeter. Repeatability of three sets of measurements from each device were evaluated using the coefficient of variation, standard deviation, and intraclass correlation coefficient. T-test with Bonferroni adjustment and Bland and Altman plots were used to assess agreement between devices. Results: For the Sirius® the coefficient of variation was 0.291%, and for the ultrasound pachymeter was 0.238%. The standard deviation was 0.123μm and 0.101μm for Sirius® and US respectively and the intraclass correlation coefficient was higher than 0.95 in all measurements. Ultrasound pachymetry systematically yielded higher values and statistically significant (mean 543.867 vs 558.267μm Sirius® and ultrasound pachymeter respectively), but the difference was not clinically significant. Conclusion: In the assessment of normal corneas, central corneal thickness measured with both devices showed high repeatability and good agreement. Even though central corneal thickness measurements obtained by Sirius® were systematically lower than those obtained by ultrasound pachymeter, they do not have clinical significance. © 2014 Sociedad Mexicana de Oftalmologi
Original languageSpanish
Pages (from-to)225-229
Number of pages5
JournalRevista Mexicana de Oftalmologia
DOIs
Publication statusPublished - 2015

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Corneal Pachymetry
Ultrasonics
Healthy Volunteers
Tomography
Equipment and Supplies
Cornea

All Science Journal Classification (ASJC) codes

  • Ophthalmology

Cite this

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title = "Comparison of the measurement of central corneal thickness measured by a new device of tomography with Scheimpflug camera and Placido rings (Sirius{\circledR}) and ultrasonic pachymetry in healthy subjects,Comparaci{\'o}n de la medici{\'o}n del grosor corneal central medido con un nuevo equipo de tomograf{\'i}a con c{\'a}mara de Scheimpflug y anillos de Pl{\'a}cido (Sirius{\circledR}) y paquimetr{\'i}a ultras{\'o}nica en sujetos sanos",
abstract = "{\circledC} 2015 Sociedad Mexicana de Oftalmolog{\'i}a. Objective: To assess the repeatability and comparability of the central corneal thickness measurements obtained from a novel Scheimpflug camera with a Placido-disc topographer (Sirius{\circledR}) and ultrasound pachymetry. Material and methods: In a sample of thirty unoperated eyes of healthy subjects, the central corneal thickness was analyzed by a single examiner using the Sirius{\circledR} and the ultrasound pachymeter. Repeatability of three sets of measurements from each device were evaluated using the coefficient of variation, standard deviation, and intraclass correlation coefficient. T-test with Bonferroni adjustment and Bland and Altman plots were used to assess agreement between devices. Results: For the Sirius{\circledR} the coefficient of variation was 0.291{\%}, and for the ultrasound pachymeter was 0.238{\%}. The standard deviation was 0.123μm and 0.101μm for Sirius{\circledR} and US respectively and the intraclass correlation coefficient was higher than 0.95 in all measurements. Ultrasound pachymetry systematically yielded higher values and statistically significant (mean 543.867 vs 558.267μm Sirius{\circledR} and ultrasound pachymeter respectively), but the difference was not clinically significant. Conclusion: In the assessment of normal corneas, central corneal thickness measured with both devices showed high repeatability and good agreement. Even though central corneal thickness measurements obtained by Sirius{\circledR} were systematically lower than those obtained by ultrasound pachymeter, they do not have clinical significance. {\circledC} 2014 Sociedad Mexicana de Oftalmologi",
author = "Manuel Garza-Le{\'o}n and {de la Parra-Col{\'i}n}, Paola and Tonatiuh Barrientos-Gutierrez",
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journal = "Revista Mexicana de Oftalmologia",
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T1 - Comparison of the measurement of central corneal thickness measured by a new device of tomography with Scheimpflug camera and Placido rings (Sirius®) and ultrasonic pachymetry in healthy subjects,Comparación de la medición del grosor corneal central medido con un nuevo equipo de tomografía con cámara de Scheimpflug y anillos de Plácido (Sirius®) y paquimetría ultrasónica en sujetos sanos

AU - Garza-León, Manuel

AU - de la Parra-Colín, Paola

AU - Barrientos-Gutierrez, Tonatiuh

PY - 2015

Y1 - 2015

N2 - © 2015 Sociedad Mexicana de Oftalmología. Objective: To assess the repeatability and comparability of the central corneal thickness measurements obtained from a novel Scheimpflug camera with a Placido-disc topographer (Sirius®) and ultrasound pachymetry. Material and methods: In a sample of thirty unoperated eyes of healthy subjects, the central corneal thickness was analyzed by a single examiner using the Sirius® and the ultrasound pachymeter. Repeatability of three sets of measurements from each device were evaluated using the coefficient of variation, standard deviation, and intraclass correlation coefficient. T-test with Bonferroni adjustment and Bland and Altman plots were used to assess agreement between devices. Results: For the Sirius® the coefficient of variation was 0.291%, and for the ultrasound pachymeter was 0.238%. The standard deviation was 0.123μm and 0.101μm for Sirius® and US respectively and the intraclass correlation coefficient was higher than 0.95 in all measurements. Ultrasound pachymetry systematically yielded higher values and statistically significant (mean 543.867 vs 558.267μm Sirius® and ultrasound pachymeter respectively), but the difference was not clinically significant. Conclusion: In the assessment of normal corneas, central corneal thickness measured with both devices showed high repeatability and good agreement. Even though central corneal thickness measurements obtained by Sirius® were systematically lower than those obtained by ultrasound pachymeter, they do not have clinical significance. © 2014 Sociedad Mexicana de Oftalmologi

AB - © 2015 Sociedad Mexicana de Oftalmología. Objective: To assess the repeatability and comparability of the central corneal thickness measurements obtained from a novel Scheimpflug camera with a Placido-disc topographer (Sirius®) and ultrasound pachymetry. Material and methods: In a sample of thirty unoperated eyes of healthy subjects, the central corneal thickness was analyzed by a single examiner using the Sirius® and the ultrasound pachymeter. Repeatability of three sets of measurements from each device were evaluated using the coefficient of variation, standard deviation, and intraclass correlation coefficient. T-test with Bonferroni adjustment and Bland and Altman plots were used to assess agreement between devices. Results: For the Sirius® the coefficient of variation was 0.291%, and for the ultrasound pachymeter was 0.238%. The standard deviation was 0.123μm and 0.101μm for Sirius® and US respectively and the intraclass correlation coefficient was higher than 0.95 in all measurements. Ultrasound pachymetry systematically yielded higher values and statistically significant (mean 543.867 vs 558.267μm Sirius® and ultrasound pachymeter respectively), but the difference was not clinically significant. Conclusion: In the assessment of normal corneas, central corneal thickness measured with both devices showed high repeatability and good agreement. Even though central corneal thickness measurements obtained by Sirius® were systematically lower than those obtained by ultrasound pachymeter, they do not have clinical significance. © 2014 Sociedad Mexicana de Oftalmologi

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