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Title: Apparatus and method for non-contact, acoustic resonance determination of intraocular pressure

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.
 [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
OSTI Identifier:
Regents of University of Calif. (Alameda, CA) LANL
Patent Number(s):
US 5375595
Contract Number:
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
apparatus; method; non-contact; acoustic; resonance; determination; intraocular; pressure; measuring; changes; eye; investigation; detection; vibrational; resonances; therein; ultrasonic; transducer; operating; resonant; frequency; amplitude; modulated; swept; range; audio; frequencies; human; eyes; resonate; output; therefrom; focused; vibrations; observed; fiber-optic; reflection; vibration; sensor; dependent; readily; determined; baseline; established; amplitude modulated; pressure changes; pressure therein; acoustic resonance; resonant frequency; ultrasonic transducer; vibration sensor; intraocular pressure; resonances therein; human eye; pressure change; /600/