Multi-purpose ophthalmological apparatus

• US 7,878,654 B2
• Filed: 04/02/2008
• Issued: 02/01/2011
• Est. Priority Date: 04/03/2007
• Status: Active Grant

• Current Assignee: Optikon 2000 S.p.A. (Optishare SRL)
• Original Assignee: Optikon 2000 S.p.A. (Optishare SRL)
• Inventors: Frondizi, Stefano, Mattioli, Renzo
• Primary Examiner(s): SCHWARTZ, JORDAN MARC
• Application Number:
  US12/061,116
• Publication Number:
  US 20090046250A1
• Time in Patent Office: 1,035 Days
• Field of Search: 351/211, 351/212, 351237-239
• US Class Current: 351/211
• CPC Class Codes: A61B 3/1005 for measuring distances inside the eye, e.g. thickness of the cornea A61B3/11 takes precedence
• CPC Class Codes: A61B 3/1015 for wavefront analysis
• CPC Class Codes: A61B 3/107 for determining the shape or measuring the curvature of the cornea

Abstract

The present invention relates to a multi-purpose ophthalmological apparatus, comprising first optical means, provided with one or more first mires, and sensing means for acquiring along a first optical path an image comprising said one or more first mires reflected by a patient'"'"'s eye, characterised in that it comprises separating optical means for separating the first optical path from at least one second optical path, and in that it further comprises second optical means, provided with one or more second mires, located along the first optical path between the separating optical means and the sensing means, whereby said image further comprises said one or more second mires reflected by the patient'"'"'s eye.

Claims

1. A multi-purpose ophthalmological apparatus, comprising a first optical means, provided with one or more first mires, and sensing means for acquiring along a first optical path an image comprising said one or more first mires reflected by a patient'"'"'s eye, the apparatus further comprising separating optical means for separating the first optical path from at least one second optical path, and a second optical means, provided with one or more second mires, located along the first optical path between the separating optical means and the sensing means, whereby said image further comprises said one or more second mires reflected by the patient'"'"'s eye, and wherein said one or more first mires and said one or more second mires are homogeneously arranged.

2. An apparatus according to claim 1, wherein said separating optical means comprises at least one interferential optical filter capable to transmit at least one first band of light frequencies and to reflect at least one second band of light frequencies.

3. An apparatus according to claim 1, wherein said separating optical means comprises at least one filter-mirror and/or at least one beam-splitter cube.

4. An apparatus according to claim 1, wherein it further comprises electronic means for storing said image and performing a reflection corneal topography on the basis of said image.

5. An apparatus according to claim 1, wherein it further comprises along said at least one second optical path optical and/or electronic means for performing a measurement of ocular aberrometry, through a measurement of the wavefront coming from the retinal reflex of a beam projected onto the same eye, and/or a measurement of sections of anterior ocular segment through slit light and/or a corneal thickness measurement, with Scheimpflug camera, and/or a measurement of autorefractometry and/or a measurement of PSF (Point Spread function) on the retina and/or a measurement of endothelial microscopy and/or a measurement of corneal confocal and/or a measurement of OCT on the anterior ocular segment or on the retina and/or a measurement of ophthalmoscopy and/or a measurement of crystalline opacity density and/or a measurement of perimetry and/or a measurement of micro-perimetry and/or a measurement of the FDT (Frequency doubling) and/or a subjective measurement of glare and/or a measurement of contrast and/or a measurement of vision and/or a measurement of sensitivity to colours and/or a measurement of pupillometry, with a plurality of luminosity levels, and/or a measurement of pupil in relation to the apex and/or a measurement of iris and/or a measurement of scleral veins and/or a measurement of marking signs, in photopic and/or scotopic-mesopic conditions.

6. An apparatus according to claim 1, wherein it comprises along said at least one second optical path an assembly for fixation and/or for controlling fogging of the patient'"'"'s eye.

7. An apparatus according to claim 1, wherein said first optical means comprises at least one illuminator capable to illuminate at least one Placido disk, with plane and/or conical and/or curved surface, and/or at least one Dekking cone, with internal revolution, cylindrical frustum and/or conical frustum surface.

8. An apparatus according to claim 1, wherein said one or more first mires comprises alternatively white-black stripes and/or narrow lines and/or alternatively coloured lines and/or alternatively coloured stripes and/or concentric rings and/or cobweb and/or chessboard rings.

9. An apparatus according to claim 1, wherein said second optical means comprises lighting elements capable to enable a projection of said one or more second mires.

10. An apparatus according to claim 9, wherein said second optical means comprises a body having a luminous surface and/or a back-illuminated scattering surface.

11. An apparatus according to claim 10, wherein said one or more second mires comprises alternatively white-black stripes and/or narrow lines and/or alternatively coloured stripes and/or alternatively coloured lines and/or concentric rings and/or cobweb and/or chessboard rings.

12. An apparatus according to claim 1, wherein the sensing means comprises at least one lens and at least one optoelectronic sensor.

13. An apparatus according to claim 1, wherein the sensing means perform centring and/or monitoring functions.

14. An apparatus according to claim 10, wherein said ring is a cylindrical ring.

15. An apparatus according to claim 12, wherein the at least one optoelectronic sensor comprises a sensor of CCD and/or CMOS type.

16. An apparatus according to claim 3, wherein the surfaces of said at least one filter-mirror and/or said at least one beam-splitter cube are at least partially anti-reflective.

17. An apparatus according to claim 10, wherein said body is a cylindrical ring or annular body.

18. An apparatus according to claim 1, wherein the sensing means comprises one lens.