Intraocular pressure remote photonic biomonitoring based on temporally encoded external sound wave stimulation

Aviya Bennett, Yevgeny Beiderman, Sergey Agdarov, Yafim Beiderman, Nisan Ozana, Michael Belkin, Zeev Zalevsky

Research output: Contribution to journalArticlepeer-review

Abstract

Continuous noninvasive measurement of intraocular pressure (IOP) is an important tool in the evaluation process for glaucoma. We present a methodology enabling high-precision, noncontact, reproducible, and continuous monitoring of IOP based on the value of the damping factor of transitional oscillations obtained at the surface of the eye after terminating its stimulation by a sound wave. The proposed configuration includes projection of a laser beam and usage of a fast camera for analyzing the temporal-spatial variations of the speckle patterns backscattered from the iris or the sclera following the above-mentioned sound waves external stimulation. The methodology was tested on an artificial eye and a carp fish eye under varying pressure as well as on human eyes.

Original languageEnglish
Article number117001
JournalJournal of Biomedical Optics
Volume23
Issue number11
DOIs
StatePublished - 1 Nov 2018

Keywords

  • Fourier optics and signal processing
  • intraocular pressure
  • lasers
  • medical optics instrumentation
  • optics
  • pattern recognition
  • speckle

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