Comparation between Keeler and ORA IOP measurements

Abstract

AbstractPurpose To evaluate the relationship between intraocular pressure (IOP) measurements obtained with Pulsair EasyEye (PEE) and Ocular Response Analyser (ORA) in healthy subjects.Methods Sixty‐five eyes from 65 healthy subjects were prospective and consecutively evaluated. All of them underwent a full optometric examination, including central corneal thickness (CCT), and IOP measured with both PEE and ORA devices. Differences between IOP measurements between both tonometers were analyzed.Results Statistically differences were found between IOP measurements of PEE (IOPk) and ORA Goldmann‐corrected IOP (IOPg; p=0.001). IOPk and ORA corneal resistance‐corrected IOP (IOPcc) were also statistically different (p=0.025). However, no differences between IOPg and IOPcc were found (p=0.952). Mean differences between IOPg‐IOPk, IOPcc‐IOPk and IOPg‐IOPcc (±SD) were 0.71±1.66, 0.70±2.46 and 0.01±1.54 mmHg respectively. Pearson correlation coefficients showed that IOPk, IOPg, IOPcc were significantly correlated (p<0.001): r=0.816 for IOPk‐IOPg, r=0.826 for IOPcc‐IOPg and r=0.587 IOPcc‐IOPk.Conclusion There are statistically differences between mean IOP values measured with PEE and ORA. ORA tonometer provides higher IOP values than PEE in most of the cases. IOPk, IOPcc and IOPg have, at least, moderate positive linear correlations between them.