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Intraocular pressure remote photonic biomonitoring based on temporally encoded external sound wave stimulation
Aviya Bennett1, Yevgeny Beiderman1, Sergey Agdarov1
1Bar-Ilan University, Faculty of Engineering and the Nanotechnology Center, Ramat-Gan, Israel.
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.
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