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Yung Ju Yoo, Jin Wook Jeoung, Ki Ho Park, Dong Myung Kim; Comparison of the New Rebound Tonometer with TonoPen for Pediatric Patients in Supine Position. Invest. Ophthalmol. Vis. Sci. 2014;55(13):141.
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To evaluate the clinical usefulness of a new rebound tonometer, Icare® PRO (Icare PRO), by comparison with Tonopen in a study on pediatric patients in supine position.
One hundred and sixty-seven eyes of 84 subjects were examined with an Icare PRO, portable slit-lamp biomicroscope, and Tonopen. A single clinician (JWJ) evaluated the intraocular pressure (IOP) with the Icare tonometer and TonoPen. The IOP was measured in supine position. The intraobserver reliability was established by calculating the intraclass correlation coefficient. The Linear regression and Bland-Altman plot were used to compare the Icare PRO and TonoPen.
The average of age at examination was 25.8 months (standard deviation [SD], 21.3 months; range, 1.3 - 70.7 months). The IOP differences between Tonopen and Icare PRO (mean, 3.10 mmHg; SD, 4.98 mmHg; 95% limit of agreement, −6.97 to 14.94 mmHg) did not vary over the age (p = 0.523) and the mean IOP values for two tonometers (p = 0.628).
Although Icare PRO underestimated IOP values when compared with Tonopen in pediatric patients with supine position, there is a good correlation between two tonometers. The IOP difference between Icare PRO and Tonopen was not affected by the age. This device may be reasonable to estimate IOP in selected pediatric patients, whose IOP can otherwise hardly be obtained in a clinical setting.
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