AIMS—To assess the accuracy of three commonly used tonometers in eyes after epikeratophakia. METHODS—Five eye bank eyes with sutured epikeratophakia buttons were connected to a manometer and a pressure transducer. Intraocular pressure was adjusted in 5 mm Hg increments from 0 to 50 mm Hg. The intraocular pressure was measured at each increment using a Goldmann tonometer, a pneumatonometer, and a Tono-pen. RESULTS—The difference between the manometer (actual pressure) and the Goldmann tonometer ranged from −19 to + 9 mm Hg (mean (SD) overestimation 2.6 (5.8) mm Hg). The pneumatonometer error ranged from −27.5 to + 5.5 mm Hg (mean (SD) overestimation 4.7 (6.1) mm Hg), and for the Tono-pen the range was −18 to + 11 mm Hg (mean (SD) overestimation 0.05 (7.9) mm Hg). The correlation coefficients for the three tonometers were 0.94, 0.92, and 0.87 for the Goldmann tonometer, pneumatonometer, and Tono-pen respectively. CONCLUSION—The Goldmann tonometer had the best correlation with the manometer in eye bank eyes with epikeratophakia (correlation coefficient 0.94), but none of the tonometers was accurate over the entire range of pressures tested. Detection of glaucoma in eyes with epikeratophakia cannot rely on tonometry alone, but requires examination of the optic nerve and visual field.
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机译：目的-评估三个常用的眼压计在眼角膜切除术后的准确性。 方法-将五只带有缝合的眼角膜缝合按钮的眼银行与压力计和压力传感器相连。眼压从0到50 mm Hg以5 mm Hg的增量进行调节。使用Goldmann眼压计，肺动脉压计和Tono笔在每个增量下测量眼内压。 结果-压力计（实际压力）与Goldmann眼压计之间的差值范围为-19至+9 mm Hg （平均（SD）高估2.6（5.8）毫米汞柱）。肺动脉压计的误差范围为−27.5至+5.5 mm Hg（平均（SD）高估4.7（6.1）mm Hg），并且Tono-pen的范围为−18至+11 mm Hg（平均（SD）高估0.05）（ 7.9）毫米汞柱）。这三个眼压计的相关系数分别为Goldmann眼压计，肺炎眼压计和Tono-pen的0.94、0.92和0.87。相关系数0.94），但是在所有测试压力范围内，没有一个眼压计是准确的。检出眼角膜性眼病的青光眼不能仅依靠眼压计，而需要检查视神经和视野。
