Comparison of Tono-Pen and Goldmann applanation tonometers for measurement of intraocular pressure in healthy children

作者：Bradfield Yasmin S^*; Kaminski Brett M; Repka Michael X; Melia Michele

来源：Journal of AAPOS, 2012, 16(3): 242-248.

DOI：10.1016/j.jaapos.2011.12.150

PURPOSE To assess the agreement of intraocular pressure (TOP) measured with the Tono-Pen and the Goldmann applanation tonometer (GAT) in normal children and adolescents.
METHODS A total of 439 subjects from birth to <18 years of age without anterior segment anomalies or glaucoma had their TOP measured with the two instruments by separate, masked examiners in the office or under general anesthesia.
RESULTS On average, the Tono-Pen measured values slightly lower than the GAT for IOP <11 mm Hg and slightly higher than the GAT for IOP >11 mm Hg in the office setting. Using the average of GAT and Tono-Pen IOPs to estimate the true IOP, the average difference (GAT - Tono-Pen) was 0.4 mm Hg at TOP of 10 mm Hg and -3.0 mm Hg at TOP of 20 mm Hg. The 95% limits of agreement on the average difference between instruments were +/-6.4 mm Hg in the office setting and +/-6.8 mm Fig under general anesthesia. Larger differences between instruments were found with younger age. Standard error of measurement with the Tono-Pen was 1.44 mm Hg and 1.82 mm Hg for the office and anesthesia settings, respectively. Thicker corneas were associated with higher TOP with both the GAT and the Tono-Pen.
CONCLUSIONS In normal children, average differences between TOP measured by Tono-Pen and GAT were small, although there was substantial test-retest variability. Younger age was associated with larger average differences, as was higher TOP in the office setting. (J AAPOS 2012;16:242-248)

• 出版日期2012-6