System, device, and method for determination of intraocular pressure
First Claim
1. An intraocular pressure sensor for implantation in an eye, comprising:
- a substrate member;
a spacer member; and
a flexible membrane;
the substrate member, the spacer member and the flexible membrane forming the walls of a sealed cavity having no openings for fluid communication with a vacuum, and forming the intraocular pressure sensor configured for implantation in the eye;
the flexible membrane configured to deform in response to intraocular pressure changes and wherein the deformation of the flexible membrane can be measured optically;
the flexible membrane configured to partially transmit and partially reflect an incident light that is incident on an exterior surface of the flexible membrane when the intraocular pressure sensor is implanted in the eye, and the substrate member configured to reflect the incident light that is partially transmitted by the flexible membrane back through the flexible membrane;
wherein the incident light reflected by the substrate member interferes with incident light reflected by the flexible membrane to create a resultant light comprising an interference pattern consisting of bright and dark rings having a separation depending on a curvature of the flexible membrane;
wherein the resulting interference pattern is capturable as an image using a camera and corresponds to intraocular pressure; and
wherein the sealed cavity has a pressure below one atmosphere.
3 Assignments
0 Petitions
Accused Products
Abstract
A system for determination of intraocular pressure includes: an intraocular pressure sensor; a light source illuminating the sensor with one or more wavelengths of light; and a detector that measures emitted light from the sensor. The sensor includes a substrate member, a spacer member, and a flexible membrane, which define a sealed cavity. The flexible membrane moves in response to intraocular pressure changes. A device for measuring intraocular pressure includes: the sensor; an anchoring member attached to the sensor for immobilizing the sensor in an eye; and a protective member attached to the anchoring member and covering the sensor to prevent contact between the flexible membrane and the eye. A method for determination of intraocular pressure includes: placing the sensor in an eye; illuminating, with a light source, the sensor with one or more wavelengths of light; and detecting, with a detector, a resultant light that contains information about intraocular pressure.
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Citations
7 Claims
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1. An intraocular pressure sensor for implantation in an eye, comprising:
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a substrate member;
a spacer member; and
a flexible membrane;the substrate member, the spacer member and the flexible membrane forming the walls of a sealed cavity having no openings for fluid communication with a vacuum, and forming the intraocular pressure sensor configured for implantation in the eye; the flexible membrane configured to deform in response to intraocular pressure changes and wherein the deformation of the flexible membrane can be measured optically; the flexible membrane configured to partially transmit and partially reflect an incident light that is incident on an exterior surface of the flexible membrane when the intraocular pressure sensor is implanted in the eye, and the substrate member configured to reflect the incident light that is partially transmitted by the flexible membrane back through the flexible membrane; wherein the incident light reflected by the substrate member interferes with incident light reflected by the flexible membrane to create a resultant light comprising an interference pattern consisting of bright and dark rings having a separation depending on a curvature of the flexible membrane; wherein the resulting interference pattern is capturable as an image using a camera and corresponds to intraocular pressure; and
wherein the sealed cavity has a pressure below one atmosphere. - View Dependent Claims (2, 3, 4, 5, 7)
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6. An intraocular pressure sensor for implantation in an eye, comprising:
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a substrate member;
a spacer member; and
a flexible membrane;the substrate member, the spacer member and the flexible membrane forming the walls of a sealed cavity having no openings for fluid communication with a vacuum, and forming the intraocular pressure sensor configured for implantation in the eye; the flexible membrane configured to deform in response to intraocular pressure changes and wherein the deformation of the flexible membrane can be measured optically; the flexible membrane configured to partially transmit and partially reflect an incident light that is incident on an exterior surface of the flexible membrane when the intraocular pressure sensor is implanted in the eye, and the substrate member configured to reflect the incident light that is partially transmitted by the flexible membrane back through the flexible membrane; wherein the incident light reflected by the substrate member interferes with incident light reflected by the flexible membrane to create a resultant light comprising an interference pattern consisting of bright and dark rings having a separation depending on a curvature of the flexible membrane; and wherein the resulting interference pattern is capturable as an image using a camera and corresponds to intraocular pressure; and further comprising a layer of additional material coated on the external side of the flexible membrane, the thickness and refractive index of the additional material configured to equalize the incident light reflected by the substrate member and the incident light reflected by the flexible membrane.
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Specification