Estudio comparativo de la medición del poder corneal central usando el queratómetro manual, el IOLMaster® y el tomógrafo Sirius®

Translated title of the contribution: Comparative study of the measurement of central corneal power using the manual keratometer, the IOLMaster® and Sirius® tomography

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Objective: To assess the repeatability and comparability of the central keratometric power measurements obtained from a novel Scheimpflug camera with a Placido-disc topographer (Sirius®), manual keratometer and IOLMaster®. Material and methods: In a sample of 30 unoperated eyes of healthy subjects, the central corneal power was analyzed by a single examiner using the Sirius®, the manual keratometer and the IOLMaster®. Repeatability of 3 sets of measurements from each device were evaluated using the coefficient of variation, standard deviation, and intraclass correlation coefficient. T-test with Bonferrioni adjustment and Bland and Altman plots were used to assess agreement between devices. Results: All instruments showed high reproducibility with coefficient of variation less than 0.30% for all measurements (0.291% and 0.237%, 0.238% and 0.361%, 0.238% and 0.208% for the flattest (FK) and steepest keratometry of Sirius®, manual keratometer and IOLMaster® respectively) and a higher intraclass correlation coefficient of 0.95 in all measurements. The manual keratometer has the lowest keratometric power (FK 41,988 and SK 43,277 D), followed by Sirius® (FK 42.285 D and SK 43.510 D) and finally the IOLMaster® (FK 42.483 D and SK 43.763 D), with a statistically significant differences. Conclusion: In the assessment of normal corneas, central corneal power measured with this 3 devices showed high repeatability however there was no agreement between the equipments and the differences were statistically significant.
Translated title of the contributionComparative study of the measurement of central corneal power using the manual keratometer, the IOLMaster® and Sirius® tomography
Original languageSpanish
Pages (from-to)111-117
Number of pages7
JournalRevista Mexicana de Oftalmologia
Volume90
Issue number3
DOIs
Publication statusPublished - 1 May 2016

All Science Journal Classification (ASJC) codes

  • Ophthalmology

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