接触式压平眼压计压重误差检定装置研制

Research and Design on Verification Device of the Measuring Force of Goldmann Applanation Tonometers

接触式压平眼压计是国际上临床诊断眼压量值的标准眼压计,属于我国强检计量器具。然而目前国内对接触式压平眼压计的检测能力薄弱、技术落后,至今仍未开展强制检定。本文自主设计研制了一套接触式压平眼压计的压重误差检定装置,采用"L"形式的平衡支架,以电子分析天平作平衡位置判断标准。实验结果表明,装置具有较小的鉴别力与测量不确定度,良好的测量重复性和稳定性,其溯源方式与国际一致,处于国内技术领先水平。

Goldmann applanation tonometer（GAT） is internationally served as a standard on clinical diagnosis of intraocular pressure, which belongs to the domestic mandatory measuring instrument. However the GAT in China has not been mandatory tested result due to the lack of the relevant measuring capability. In present paper, a verification device of GAT measuring force has been researched and designed, using a＂ L＂ shape balance bracket and an analytical balance as a standard of judgment for balance position. The results show that such verification device is in a state of the art in China, thanks to tiny discrimination threshold and uncertainty of measurement, good repeatability and stability, where the metrological traceability is in accordance with the international standard.