Ultrasound intraocular pressure sensor in sclera or in cornea
AssigneeVerily Health Inc.
InventorsSupriyo Sinha, Dimitri T. Azar
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Abstract
An intraocular pressure (IOP) measurement system. An ultrasound pressure sensor is implantable in an eye, wherein the sensor has a sealed cavity that changes shape as a function of IOP of the eye. An ultrasound transmitter emits an incident ultrasound beam. A receiver produces an output signal in response to receiving a reflected ultrasound beam. A spectrometer is configured to estimate the IOP of the eye based on processing the output signal of the receiver. Other aspects are also described and claimed.
Claims24
An intraocular pressure (IOP) measurement system comprising:
- an ultrasound pressure sensor implantable in an eye, wherein the sensor has a sealed cavity that changes shape as a function of IOP of the eye, the sealed cavity defined by a membrane and a rigid substrate;
- an ultrasound transmitter configured to emit an incident ultrasound beam, the ultrasound pressure sensor being configured to be positioned in a manner that the incident ultrasound beam reaches the rigid substrate before the membrane;
- a receiver configured to produce an output signal determined based on interfering reflections of an ultrasound beam off the membrane and the rigid substrate;
- and
- a spectrometer configured to estimate the TOP of the eye based on processing the output signal of the receiver.
A method for measuring IOP of an eye, the method comprising:
- emitting an ultrasound beam toward a pressure sensor, which is implanted in a cornea or a sclera of the eye, the pressure sensor being configured to be positioned in a manner that the ultrasound beam reaches a rigid substrate of the pressure sensor before a membrane of the pressure sensor;
- detecting, as an output signal, interfering reflections of the ultrasound beam from the membrane and the rigid substrate;
- and
- processing the output signal to compute an estimate of the TOP of the eye.
A non-transitory processor-readable storage medium storing a plurality of processor-executable instructions for measuring IOP of an eye, the plurality of processor-executable instructions being executed by a processor to perform operations comprising:
- actuating an ultrasound transmitter to emit an ultrasound beam toward the eye;
- detecting, as an output signal, interfering reflections of the ultrasound beam from a membrane and a rigid substrate of a pressure sensor that is implanted in a cornea or sclera of the eye, the pressure sensor being configured to be positioned in a manner that the ultrasound beam reaches the rigid substrate before the membrane;
- and
- processing the output signal to compute an estimate of the TOP of the eye.
Dependencies are inferred from the claim text.