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ORIGINAL RESEARCH article

Front. Ophthalmol.
Sec. Glaucoma
Volume 4 - 2024 | doi: 10.3389/fopht.2024.1441343

Evaluation of agreement of IOP measurements by Tono-Vera Tonometer to Goldmann Applanation Tonometry

Provisionally accepted
David A. Taylor David A. Taylor 1*Charles Niles Charles Niles 2Russell Bonaventura Russell Bonaventura 1Alexander R. Crinzi Alexander R. Crinzi 3
  • 1 Ametek (United States), Berwyn, United States
  • 2 Other, Willaimsville, United States
  • 3 University at Buffalo, Buffalo, New York, United States

The final, formatted version of the article will be published soon.

    Purpose: To evaluate the accuracy of the new Tono-Vera rebound tonometer (Reichert Inc, Buffalo, NY) compared to Goldmann Applanation Tonometry.Methods: This prospective, observational, cross-sectional study was designed in accordance with ANSI Z80. 10-2014 and ISO 8612-2009 guidelines for tonometer comparison. Intraocular Pressure (IOP) was measured by Goldmann Applanation and Tono-Vera on 160 eyes of 160 subjects. Corneal Astigmatism and Central Corneal Thickness were also measured. A single investigator (CN) conducted all measurements. The average of two measurements from each tonometer was used in the analysis. Bland-Altman plots, total least squares regression analysis, and simple linear regression were used to evaluate agreement between the tonometers.Results: Average IOP values from Goldmann Applanation and Tono-Vera were not significantly different (19.17 and 19.03 respectively, p=0.40, paired t-test). The total least squares regression analysis indicated strong agreement between the two tonometers (slope +0.97, offset +0.49 mmHg, standard deviation 2.11 mmHg). There were 2 IOP measurement pairs that exceeded the + 5 mmHg limits of agreement required in ANSI Z80.10-2014 and ISO 8612-2009, which is within the range of acceptability specified in the standards.We evaluated IOP measurements by Tono-Vera Rebound Tonometer vs Goldmann Applanation Tonometry for eyes with a wide range of IOP values and found no statistically significant differences in the results. Tono-Vera meets the requirements of ANSI Z80.10-2014 and ISO 8612-2009, demonstrating accuracy comparable to Goldmann tonometry.

    Keywords: Tonometer, Tonometry, IOP, Goldmann, Tono-Vera

    Received: 30 May 2024; Accepted: 17 Jul 2024.

    Copyright: © 2024 Taylor, Niles, Bonaventura and Crinzi. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: David A. Taylor, Ametek (United States), Berwyn, United States

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.