Ophthalmotonometer

Details Ophthalmotonometer Ophthalmotonometer

1987-02-20

1988-07-26

Coven, Edward M.

Surgery

Truss

Pad

128652, A61B 316

Patent

active

047593709

ABSTRACT:
The ophthalmotonometer of the invention comprises a frequency-output transducer of linear motions which correspond to intraocular pressure; a reference-frequency generator; a frequency comparator whose inputs are connected to the outputs of the frequency-output transducer and of the reference-frequency generator, a difference-frequency divider connected to outputs of the frequency comparator; a circuit for measurement of the cycle of difference-frequency oscillations connected to outputs of the reference frequency generator and the frequency divider, said cycle corresponding to intraocular pressure in millimeters of mercury; and a measurement results registration circuit connected to outputs of the cycle measurement circuit.

REFERENCES:
patent: 3992926 (1976-11-01), Berryhill
patent: 4164863 (1979-08-01), Ragsdale
patent: 6572319 (1971-03-01), Bilther et al.

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