Intraocular pressure measurement
AssigneeNess Tec Ophthalmic Systems Ltd.
InventorHenry Israel
Life of this patent
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Abstract
Apparatus for measuring intra-ocular pressure of an eye includes a housing and a processor. The housing has a protuberance with a flat surface and the processor includes a distance-measuring unit and a force-measuring unit. Intra-ocular pressure is calculated based on force/distance relationships, where the distance includes a measurement to an internal element of the eye. The processor calculates intra-ocular pressure by determining a zero displacement pressure.
Claims27
Apparatus for measurement of intra-ocular pressure of an eye, the apparatus comprising:
- a distance-measuring unit for measuring a distance from an external surface of said eye to an internal element of said eye;
- and
- a processor for generating said intra-ocular pressure from at least said distance measurement.
A non-invasive ocular pressure measuring unit comprising:
- a housing having a protuberance with a generally flat surface;
- and
- a processor comprising at least a force-measuring unit, for measuring a force applied by said protuberance to an eyelid.
A method for detecting intra-ocular pressure of an eye, the method comprising the steps of:
- measuring a distance from an external surface of an eye to an internal element of an eye;
- and
- calculating said intra-ocular pressure from said distance.
A method for detecting intra-ocular pressure of an eye, the method comprising the steps of:
- having an apparatus placed against an eyelid, wherein said apparatus comprises at least a force-measuring unit;
- measuring at least a force resulting from said placement;
- and
- calculating an intra-ocular pressure from said at least force measurement.
A method for correcting for material properties of an external element of an eye, the method comprising the steps of:
- measuring a force applied to said external element;
- measuring a distance from said external element to an internal element of said eye;
- and
- generating a zero displacement value from a function relating said force and said distance.
- 19.The method of claim 18 wherein said external element is selected from the group consisting of an eyelid and a cornea.
- 20.The method of claim 18, wherein said internal element is selected from the group consisting of a lens and a retina.
A system for measurement of intra-ocular pressure of an eye, the system comprising:
- a housing having a protuberance with a generally flat surface;
- and
- a processor, said processor comprising:
- a force measuring unit for measuring a force applied by said protuberance to an external surface of said eye;
- and
- a distance measuring unit for measuring a distance from said external surface of said eye to an internal element of said eye,
- wherein said processor is configured to calculate a relationship between said force and distance measurements so as to produce a definable function of pressure over a range of values.
Dependencies are inferred from the claim text.