OPHTHALMIC LASER SURGICAL APPARATUS

• US 20130338648A1
• Filed: 05/31/2013
• Published: 12/19/2013
• Est. Priority Date: 06/02/2012
• Status: Abandoned Application

• Current Assignee: Nidek Company Limited
• Original Assignee: Nidek Company Limited
• Inventors: HANEBUCHI, Masaaki, TANAKA, Masaki
• Application Number:
  US13/907,172
• Publication Number:
  US 20130338648A1
• Time in Patent Office: Days
• US Class Current: 606/4
• CPC Class Codes: A61F 2009/00851 Optical coherence topography [OCT]
• CPC Class Codes: A61F 9/008 using laser
• CPC Class Codes: A61F 9/00825 for photodisruption

Abstract

An ophthalmic laser surgical apparatus includes a laser irradiation optical system configured to form a spot of laser light on a patient'"'"'s eye and move the position of the spot three-dimensionally, a unit configured to obtain a tomographic image of the patient'"'"'s eye, a unit configured to obtain control information of the laser irradiation optical system, the control information corresponding to a discriminative portion in the tomographic image, a unit configured to determine a surgical site based on the tomographic image, a unit configured to, based on the control information, generate control information of the laser irradiation optical system for irradiating the surgical site with the laser, and a unit configured to control the laser irradiation optical system based on the control information to allow the laser irradiation optical system to apply a predetermined surgical site of the patient'"'"'s eye with the laser light.

Claims

1. An ophthalmic laser surgical apparatus comprising:

a laser light source configured to emit surgical laser light;

a laser irradiation optical system including a condensing optical system configured to form a spot of the laser light on a patient'"'"'s eye by condensing the laser light, and a moving optical system configured to move a position of the spot three-dimensionally;

a tomographic image acquisition unit configured to obtain a tomographic image of the patient'"'"'s eye;

a reference irradiation control information acquisition unit configured to obtain, as reference irradiation control information, control information of the laser irradiation optical system, the control information corresponding to at least one discriminative portion included in the tomographic image;

a surgical site determining unit configured to determine a surgical site based on the tomographic image obtained by the tomographic image acquisition unit;

an irradiation control information generating unit configured to generate control information of the laser irradiation optical system for applying the laser to the surgical site determined by the surgical site determining unit based on the reference irradiation control information obtained by the reference irradiation control information acquisition unit; and

an irradiation control unit configured to control the laser irradiation optical system based on the control information generated by the irradiation control information generating unit to allow the laser irradiation optical system to apply the laser light to a predetermined surgical site of the patient'"'"'s eye.

2. The ophthalmic laser surgical apparatus according to claim 1, wherein

the reference irradiation control information acquisition unit includes:

at least one component of the laser irradiation optical system;

a second light source configured to obtain the reference irradiation control information; and

a light receiving device configured to receive reflected light from a spot position of light emitted from the second light source, and

the reference irradiation control information acquisition unit obtains the reference irradiation control information based on a light receiving signal from the light receiving device, the light receiving signal being obtained while the spot position is moved using the moving optical system.

3. The ophthalmic laser surgical apparatus according to claim 2, further comprising a laser light energy adjustment unit configured to adjust energy of the laser light emitted from the laser light source, wherein

the laser light source is a pulse laser light source configured to have an ability to emit pulse laser light to cause a breakdown at the spot position of the laser light, and also serve as the second light source, and

the laser light energy adjustment unit adjusts the energy of the laser light emitted from the laser light source to substantially free of a breakdown at the spot position of the laser light when the laser light source is used as the second light source.

4. The ophthalmic laser surgical apparatus according to claim 1, wherein the reference irradiation information acquisition unit calculates a predetermined area corresponding to the discriminative portion included in the tomographic image, and obtains the reference irradiation control information on the calculated predetermined area.

5. The ophthalmic laser surgical apparatus according to claim 2, wherein the surgical site determining unit includes:

a monitor configured to display a tomographic image of the patient'"'"'s eye; and

an input unit configured to determine the surgical site using the tomographic image of the patient'"'"'s eye displayed on the monitor.

6. The ophthalmic laser surgical apparatus according to claim 2, wherein a position of a light receiving part of the light receiving device of the reference irradiation control information acquisition unit and the spot position of the laser light from the second light source of the reference irradiation control information acquisition unit are in a substantially conjugate relationship.

7. The ophthalmic laser surgical apparatus according to claim 6, wherein the irradiation control information generating unit matches the reference irradiation control information obtained by the reference irradiation control information acquisition unit with the discriminative portion included in the tomographic image obtained by the tomographic image acquisition unit, and

the irradiation control information generating unit associates control information of the moving optical system with a coordinate position in the tomographic image based on the matching result.

8. The ophthalmic laser surgical apparatus according to claim 3, further comprising a laser light energy adjustment unit configured to adjust the energy of the laser light source, wherein

the laser light energy adjustment unit is configured to adjust the energy of the laser light to a level that causes an eyeball tissue of the patient'"'"'s eye to absorb a multiphoton at the spot position of the laser light, and to cause fluorescent emission or reflection at the spot position, and

the light receiving device receives fluorescent or reflected light caused at the spot position.

9. The ophthalmic laser surgical apparatus according to claim 1, wherein

the tomographic image acquisition unit obtains a plurality of tomographic images corresponding to different positions of the patient'"'"'s eye, and

the reference irradiation control information acquisition unit obtains the reference irradiation control information based on the plurality of tomographic images.