Baneros-Rojas P.,Hospital Universitario Clinico San Carlos |
Baneros-Rojas P.,Institute Investigacion Sanitaria Del Hospital Clinico San Carlos IdISSSC |
Martinez De La Casa J.M.,Hospital Universitario Clinico San Carlos |
Martinez De La Casa J.M.,Institute Investigacion Sanitaria Del Hospital Clinico San Carlos IdISSSC |
And 12 more authors.
Archivos de la Sociedad Espanola de Oftalmologia | Year: 2014
Purpose To compare intraocular pressure (IOP) between the new non-contact tonometer Corvis ST (CST), the Goldmann applanation tonometry (GAT) and Icare Pro rebound tonometer (PRO). Methods A total of 178 eyes of 178 healthy subjects were selected for the study. Measurements of IOP were made in a random order with GAT, PRO and CST. Central corneal thickness (CCT) was determined by ultrasound pachymetry. The mean of three valid measurements of each variable was used in the statistical analysis. The relationship between the tonometers was established using Bland-Altman plots. Results Mean IOP was 15.5 ± 2.8 mmHg for GAT, 15.4 ± 2.8 mmHg for CST, and 14.6 ± 2.3 mmHg for PRO. The mean differences between pairs of tonometers were: GAT-PRO = 0.9 ± 1.7 mmHg (P<.001), GAT-CST: 0.1 ± 2.2 (P=.398), and PRO-CST: -0.8 ± -0.7 mmHg, p<0.001. A positive relationship was detected between CCT and the three tonometers: GAT: r = 0.325, P<.001; PRO: r = 0.385, P<.001, and CST: r = 0.428; P<.001. Conclusions The differences found between PRO and GAT were significantly higher than those found between CST and GAT, which showed non-significant differences. The measurements of the three tonometers were affected by the CCT. © 2012 Sociedad Española de Oftalmología. Published by Elsevier España, S.L. All rightsreserved.