Apparatus and method for non-contact, acoustic resonance determi

Details Apparatus and method for non-contact, acoustic resonance determi Apparatus and method for non-contact, acoustic resonance determi

1993-03-17

1994-12-27

Cohen, Lee S.

Surgery

Truss

Pad

128649, A61B 316

Patent

active

053755952

ABSTRACT:
Apparatus and method for measuring intraocular pressure changes in an eye under investigation by detection of vibrational resonances therein. An ultrasonic transducer operating at its resonant frequency is amplitude modulated and swept over a range of audio frequencies in which human eyes will resonate. The output therefrom is focused onto the eye under investigation, and the resonant vibrations of the eye observed using a fiber-optic reflection vibration sensor. Since the resonant frequency of the eye is dependent on the pressure therein, changes in intraocular pressure may readily be determined after a baseline pressure is established.

REFERENCES:
patent: 3882718 (1975-05-01), Kriebel
patent: 4056741 (1977-11-01), Hoerz et al.
patent: 4801799 (1989-01-01), Tromborg et al.
patent: 4928697 (1990-05-01), Hsu
patent: 4945913 (1990-08-01), Krasnicki et al.

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