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31 December 2008 Development of a self-measurement tonometer
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Proceedings Volume 7130, Fourth International Symposium on Precision Mechanical Measurements; 71302S (2008)
Event: Fourth International Symposium on Precision Mechanical Measurements, 2008, Anhui, China
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.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jianguo Ma, Xueyong Zhang, and Rongsheng Lu "Development of a self-measurement tonometer", Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71302S (31 December 2008);

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