tonometer

(to-nom’et-er) [Gr. révos tone + μέτρον measure]. An instrument for measuring tension, especially the blood-pre ure or the intra-ocular tension. Girtner’s t., an instrument for measuring blood-pre ure by means of a compre ing ring applied to the finger. Musken’s t., an instrument for measuring the tonicity of the Achilles tendon. Schidtz’s t., an instrument for measuring the intra-ocular pre ure.