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Tono-Pen是一种以电池(4个手表电池)为动力,钢笔样(长18cm,包括电池重约60g)的手持眼压计,为美国Oculab公司生产。该眼压计使用一种实心的应变片传感器(solid strain gauge transducer)。前端有一直径为1.02mm的测量头。其后5μm处有一直径3.22mm的圆盘。测量头触及角膜时,压力被传递到圆盘,引起电压变化。单片微处理机(single-chip microprocessor)对电压的改变进行贮存、分析和数字化。它对3～6次测得的眼压进行平均,平均眼压的读数以mmHg为单位显示在液晶屏上。测量的可信性和每次测
The Tono-Pen is a hand-held tonometer powered by a battery (4 watch batteries) and pen-like (18cm long including a battery weighing about 60g) manufactured by Oculab, USA. The tonometer uses a solid strain gauge transducer. The front has a diameter of 1.02mm measuring head. There was then a 3.22 mm diameter disc at 5 μm. When the probe touches the cornea, the pressure is transmitted to the disk causing the voltage to change. Single-chip microprocessors store, analyze, and digitize changes in voltage. It measured 3 to 6 times the average intraocular pressure, the average intraocular pressure reading in mmHg as a unit displayed on the LCD screen. The credibility of the measurement and each measurement