Background To determine the agreement between intraocular pressure (IOP) measurements using conventional Goldmann applanation tonometry (GAT) and SUOER SW-500 Rebound Tonometer. Methods This was a prospective observational study where 205 eyes of 106 glaucoma patients had their IOPs measured by 2 fellowship trained ophthalmologists. Data were analysed using the Bland-Altman method of differences. Correlation was measured using the Pearson coefficient. Results Most of our patients were Chinese (88.7%) and female (51.9%). The average age was 66.9 years. The range of IOPs as measured by GAT was 2 to 58 mm Hg. Using the Bland-Altman method to compare GAT and SUOER SW-500 Rebound Tonometer. The tonometer overestimated the IOP by 0.5mm Hg in the right eye and underestimated it by 0.1 mm Hg in the left eye. The Tonometer IOP correlated well with GAT, with a Pearson coefficient of correlation(r) of 0.89 (P < 0.001) for the right eye and 0.86 (P < 0.001) for the left eye, respectively. In patients with GAT IOP ≥ 21 mm Hg (n = 25), the Tonometer underestimated the IOP by 2.96 mm Hg. Conclusions The IOP measurements from the SUOER SW-500 Rebound Tonometer correlates with the conventional GAT in measuring the IOP. SUOER SW-500 Rebound Tonometer may be of use, especially if the risk of transmission of infection is high considering that the probes are disposable. It is easy to use and its small size and portability makes it useful in situations where the patient is unable to be examined at the slit lamp.
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