Comparison of Intraocular Pressure Measurements Obtained by Icare PRO Rebound Tonometer, Tomey FT-1000 Noncontact Tonometer, and Goldmann Applanation Tonometer in Healthy Subjects. Issue 8 (October 2015)

• Record Type: Journal Article
• Authors: Güler, Mete; Bilak, Şemsettin; Bilgin, Burak; Şimşek, Ali; Çapkin, Musa; Hakim Reyhan, Ali
• Is Part Of: Journal of glaucoma. Volume 24:Issue 8(2015:Oct./Nov.)
• Publication Date: 2015-10
• Subjects: central corneal thickness -- Goldmann applanation tonometer -- intraocular pressure -- noncontact tonometer -- rebound tonometer; Glaucoma -- Periodicals; 617.741005
• DOI: 10.1097/IJG.0000000000000132
• Languages: English
• ISSNs: 1057-0829

Abstract

Abstract : Purpose: To compare intraocular pressure (IOP) measurements obtained by Icare PRO rebound tonometer (RT), Tomey FT-1000 noncontact tonometer (NCT), and Goldmann applanation tonometer (GAT) in healthy subjects, and to investigate the influence of central corneal thickness (CCT) on IOP measurements. Methods: A total of 132 eyes of 66 healthy subjects were included in the study. All IOP measurements were applied in a sitting position and always in the same order (RT, NCT, and GAT). CCT was measured by noncontact anterior segment optical coherence tomography. Results: The mean CCT was 523.5±31.2 μm. The mean IOPs with GAT, NCT, and RT measurements were 14.56±2.77, 13.42±2.99, 14.18±2.55 mm Hg, respectively. A significantly good agreement was found between RT and GAT measurements ( P =0.515). The mean difference between RT and GAT measurements was −0.38 mm Hg. An underestimation was found in NCT measurements compared with GAT ones as defined from paired comparisons ( P =0.003). The mean difference between NCT and GAT measurements was −1.14 mm Hg. There was no significant difference between NCT and RT readings ( P =0.069). The mean difference between NCT and RT measurements was −0.76 mm Hg. There was a significant correlation between GAT-NCT ( r =0.740, P <0.001), GAT-RT ( r =0.743, P <0.001), NCT-RT ( r =0.729, P <0.001) measurement methods. The increment in measured IOP for a 10 μm increase in CCT was 0.16, 0.33, and 0.18 mm Hg for the GAT, NCT, and RT, respectively. Conclusions: The IOP readings with the new Icare PRO RT showed good correlation with those obtained by GAT. Tomey FT-1000 NCT underestimated the IOP compared with GAT.