Devices and methods for determining the inner pressure of an eye

• US 6,746,400 B2
• Filed: 12/21/2001
• Issued: 06/08/2004
• Est. Priority Date: 06/13/2001
• Status: Expired due to Term

• Current Assignee: SIS AG Surgical Instrument Systems
• Original Assignee: SIS AG Surgical Instrument Systems
• Inventors: Rathjen, Christian
• Primary Examiner(s): MARMOR II, CHARLES ALAN
• Application Number:
  US10/023,646
• Publication Number:
  US 20020193675A1
• Time in Patent Office: 900 Days
• Field of Search: 600/398, 600/399, 600/405, 600/561
• US Class Current: 600/405
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 3/005 Constructional features of the display
• CPC Class Codes: A61B 3/16 for measuring intraocular pressure, e.g. tonometers

Abstract

Proposed is a device and a method for determining the inner pressure of a human eye, in which a plurality of pressure sensing elements, placeable on the eye, are used for measurement, with spatial resolution, of pressure values, which pressure-sensing elements are preferably disposed in a pressure sensor array, in particular in a micro-electromechanical pressure sensor array with at least one line of pressure sensing elements. The intraocular pressure is determined from the sum of the measured sensor pressure values and the number of pressure-sensing elements contributing to the sum. Pressure distribution profiles with spatial resolution and pressure distribution matrices are able to be shown graphically.

Claims

1. A device for determining intraocular pressure, comprising:

a plurality of pressure-sensing elements; and

processing means for determining the intraocular pressure from a sum of the sensor pressure values measured by the individual pressure-sensing elements and from a number of the pressure-sensing elements contributing to the sum.

2. The device according to claim 1, further comprising a pressure sensor array with at least one line of the pressure-sensing elements.

3. The device according to claim 2, wherein the pressure sensor array is designed as a micro-electromechanical system.

4. The device according to claim 2, wherein the pressure sensor array is incorporated into a measuring sensor which is connected to an evaluation unit via an interface with contacts.

5. The device according to claim 2, wherein the pressure sensor array is incorporated into a measuring sensor which is connected to an evaluation unit via an interface without contacts.

6. The device according to claim 2, further comprising filter means for excluding those measured sensor pressure values from the sum which are above a sensor pressure value at least by a defined difference value, said latter sensor pressure value being measured by those pressure-sensing elements resting in an inner region of a contact area on which the sensor array rests directly or indirectly on an eye in an applied state of the device.

7. The device according to claim 1, wherein the processing means are designed to determine the intraocular pressure from the sum of measured and weighted sensor pressure values and from the number of the pressure-sensing elements contributing to the sum.

8. The device according to claim 7, further comprising filter means for excluding, according to predefined criteria, certain measured sensor pressure values from the sum.

9. The device according to claim 1, further comprising memory means for storing the sensor pressure values and for storing a plurality of particular values for the intraocular pressure.

10. The device according to claim 9, further comprising representation means for graphically representing the at least one of measured and stored sensor pressure values, and intraocular pressure values.

11. The device according to claim 1, further comprising communications means for remotely transmitting the determined intraocular pressure values.

12. The device according to claim 1, wherein the device is a compact, mobile, portable device.

13. A system for determining intraocular pressure, comprising:

a measuring sensor for capturing measurement values for determining the intraocular pressure,

comprising a plurality of pressure-sensing elements and an evaluation unit, comprising processing means for determining the intraocular pressure from the sum of the sensor pressure values measured by individual pressure-sensing elements and from the number of the pressure-sensing elements contributing to the sum; and

an interface for transmission of the sensor pressure values, measured by the individual pressure-sensing elements, to the evaluation unit.

14. The system according to claim 13, wherein the measuring sensor further comprises a pressure sensor array with at least one line of pressure-sensing elements.

15. The system according to claim 14, wherein the interface comprises contacts.

16. The system according to claim 14, wherein the interface is contact-less.

17. The system according to claim 13, wherein the interface comprises contacts.

18. The system according to claim 13, wherein the interface is contact-less.

determining the intraocular pressure from a sum of the sensor pressure values measured by the individual pressure-sensing elements and from a number of the pressure-sensing elements contributing to the sum.

19. The system according to claim 13, wherein the evaluation unit further comprises filter means for excluding those measured sensor pressure values from the sum which are above a sensor pressure value at least by a defined difference value, said latter sensor pressure value being measured by those pressure-sensing elements resting in an inner region of a contact area on which the measuring sensor rests directly or indirectly on an eye in an applied state of the measuring sensor.

23. The method according to claim 13, wherein the intraocular pressure is determined from the sum of measured and weighted pressure values and from the number of pressure-sensing elements contributing to the sum.

24. The method according to claim 23, wherein certain measured sensor pressure values are excluded, according to predefined criteria, from the summation.

20. A method for determining intraocular pressure, comprising:

at least one of placing directly and indirectly, a plurality of pressure-sensing elements on an eye; and

determining the intraocular pressure from a sum of the sensor pressure values measured by the individual pressure-sensing elements from a number of the pressure-sensing elements contributing to the sum.

21. The method according to claim 20, wherein a pressure sensor array with at least one line of pressure-sensing elements is placed on the eye.

22. The method device according to claim 21, wherein those measured sensor pressure values are excluded from the sum in which are above a sensor pressure value at least by a defined difference value, said latter sensor pressure value being measured by those pressure-sensing elements resting in an inner region of a contact area on which the sensor array rests directly or indirectly on the eye.

25. The method according to claim 20, wherein the pressure-sensing elements are placed on a contact lens placed on the eye or on the eyelid of the eye.