Evaluation of the Icare-ONE rebound tonometer as a self-measuring intraocular pressure device in normal subjects

• Published in: Graefe's archive for clinical and experimental ophthalmology 2012-08, Vol.250 (8), p.1207-1211
• Main Authors: Halkiadakis, Ioannis, Stratos, Aimilianos, Stergiopoulos, George, Patsea, Eleni, Skouriotis, Sotiris, Mitropoulos, Panagiotis, Papaconstantinou, Dimitrios, Georgopoulos, Gerasimos
• Format: Article
• Language: English
• Subjects: Adolescent; Adult; Aged; Aged, 80 and over; Cornea - anatomy & histology; Female; Glaucoma; Humans; Intraocular Pressure - physiology; Male; Medicine; Medicine & Public Health; Middle Aged; Ophthalmology; Patient Education as Topic; Reference Values; Reproducibility of Results; Self Care - instrumentation; Tonometry, Ocular - instrumentation; Young Adult
• ISSN: 0721-832X; 1435-702X
• DOI: 10.1007/s00417-011-1875-6

Purpose To compare Icare ONE rebound self-tonometer (ICRBT) measurements with Goldman applanation tonometry (GAT). Methods A trained examiner instructed each of 60 normal subjects on use of the ICRBT. Each subject then took two measurements of his/her own pressure using the ICRBT. Finally, a different examiner, who was masked to the earlier readings, measured IOP by GAT. Bland–Altman limits of agreement (LOA), intraclass correlation coefficients (ICCs), Kappa values, and paired t -test were used to assess the agreement between the two methods. Pearson’s correlation coefficient was used for correlation analysis. Results All of the subjects were able to obtain correct measurements with ICRBT after three attempts. The mean intraocular pressure with ICRBT and GAT measurements were 16.0 ± 3.3 mmHg and 13.7 ± 2.5 mmHg respectively. The mean difference between patient’s ICRBT and technician’s GAT measurements was 2.3 mmHg ( p