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A new self-measurement tonometer operated easily by the patient at home is presented in this paper. Based on the total
reflection principle, a cone prism was designed as a measuring probe and associated a photoelectric transducer acting as
applanation area detector converted the diminished quantity of light returned from applanation surface into one
electronic signal, and a dial acting as indicator converted the applanation force of the eye into intraocular pressure. A
central processing unit with the read-only memory stored the program instructions and the interrelated data. Calibration
experiments were carried out on a stimulated cornea clamped in a Perspex chamber connected to a hydraulic manometer
to obtain intraocular pressure at different levels. Preliminary clinical testing was carried out comparing the values
obtained with those of the Goldmann tonometer. Experimental results demonstrate that the present tonometer reading has
good agreement with that of the Goldmann tonometer, which can meet patient's needs.
Jianguo Ma,Xueyong Zhang, andRongsheng Lu
"Development of a self-measurement tonometer", Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71302S (31 December 2008); https://doi.org/10.1117/12.819640
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Jianguo Ma, Xueyong Zhang, Rongsheng Lu, "Development of a self-measurement tonometer," Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71302S (31 December 2008); https://doi.org/10.1117/12.819640