Reliability of iCare ic100 Rebound Tonometry and agreement with Goldmann Applanation Tonometry in Healthy and Post-myopic LASIK Patients.

PRCIS Rebound tonometry offers excellent reliability for obtaining IOP measurements in healthy and post-myopic LASIK patients regardless of corneal parameters and axial length and regardless of the instillation of ocular topical anesthesia. PURPOSE To assess the reliability of rebound tonometry, its agreement with Goldmann applanation tonometry (GAT) and its concordance after topical anesthesia in a group of non-operated healthy patients and a group of post-myopic laser-assisted in situ keratomileusis (LASIK) patients. PATIENTS AND METHODS Fifty-four patients were included in this prospective observational, case-control study. Patients were divided into two groups: control (n=32, 26.7±6.1▒y) and LASIK (n=22, 35.8±7.6▒y). Measurements of intraocular pressure (IOP) were carried out using the iCare ic100® tonometer and GAT. The repeatability, intersession and interobserver reproducibility, GAT interchangeability and concordance after topical anesthesia of the iCare ic100® tonometer were assessed. RESULTS Clinical reliability of the iCare ic100® was excellent in terms of repeatability (intraclass correlation coefficient (ICC) = 0.909 and 0.951 in control and ICC = 0.938 and 0.961 in LASIK) as well as interobserver reproducibility (ICC = 0.896 in control and 0.916 in LASIK) and concordance after anesthesia (ICC = 0.910 in control and 0.972 in LASIK) in both groups. Intersession reproducibility was clinically good in non-operated patients (ICC = 0.758 and 0.849) and excellent in LASIK patients (ICC = 0.878 and 0.904), although statistically significant differences were obtained in the control group for both examiners (P = 0.003 for examiner 1 and P = 0.04 for examiner 2). Agreement with GAT was good in both groups (ICC = 0.805 in control and 0.790 in LASIK), although statistically different (P 0.05 for all parameters). CONCLUSIONS Rebound tonometry offers good or excellent clinical reliability in both healthy and post-myopic LASIK patients. This article highlights the efficacy of iCare ic100 rebound tonometry as a reliable tool for the measurement of IOP and the management of glaucoma in healthy patients and patients undergoing myopic LASIK surgery.