Introduction and clinical evaluation of servo-controlled applanation resonance tonometry
2012 (English)In: Acta Ophthalmologica Scandinavica, ISSN 1395-3907, E-ISSN 1600-0420, Vol. 90, no 7, 677-682 p.Article in journal (Refereed) Published
Purpose: In recent years, Applanation Resonance Tonometry (ART) has been suggested for intraocular pressure (IOP) measurements. The manual version of ART (ARTmanual) has been further developed, and to improve usability, an automatic servo-controlled prototype (ARTservo) has been proposed. The aim of this study was to assess the limits of agreement (LoA) of ARTmanual and ARTservo as compared with the reference method, Goldmann Applanation Tonometry (GAT).
Methods: This was a prospective single-centre study on 152 eyes from 77 subjects. It was designed according to International Standard Organization’s (ISO) requirements for tonometers (ISO 2001). Intraocular pressure was measured six times/method in a standardized order. The ART technique has two available analysis procedures: a dynamic one that measures IOP during the indentation phase and a static one that causes a Goldmann-like measurement during two seconds of full applanation. The 95% LoA was defined as ±1.96 × standard deviation of difference against GAT.
Results: Mean IOP for GAT was 19.1 mmHg (range: 10–37 mmHg). The 95% LoA of ARTmanual was ±4.5 mmHg for both dynamic and static analyses. The 95% LoA of ARTservo was ±5.7 mmHg for dynamic and ±4.9 mmHg for static analyses.
Conclusions: This study confirms that the ART methodology is feasible. The further developed ARTmanual fulfilled the ISO standard with both the dynamic and the static analysis techniques. ARTservo with static analysis was close to fulfilling the standard but failed to do so in the highest IOP range. ARTservo has the potential to greatly improve usability if further development is completed.
Place, publisher, year, edition, pages
2012. Vol. 90, no 7, 677-682 p.
applanation resonance tonometry, ART, glaucoma, intraocular pressure, ISO standard, tonometry
Research subject Ophtalmology
IdentifiersURN: urn:nbn:se:umu:diva-40382DOI: 10.1111/j.1755-3768.2011.02111.xISI: 000310548500026OAI: oai:DiVA.org:umu-40382DiVA: diva2:399496
Kompletteras 2012-092011-02-222011-02-222015-03-30Bibliographically approved