Method and apparatus for creating ocular surgical and relaxing incisions
A system and method of treating target tissue in a patient's eye, which includes generating a light beam, deflecting the light beam using a scanner to form first and second treatment patterns, delivering the first treatment pattern to the target tissue to form an incision that provides access to an eye chamber of the patient's eye, and delivering the second treatment pattern to the target tissue to form a relaxation incision along or near limbus tissue or along corneal tissue anterior to the limbus tissue of the patient's eye to reduce astigmatism thereof.
1. A method for treating a target tissue in a patient's eye, comprising:
generating a treatment light beam;
generating an imaging light beam;
aligning the imaging light beam and the treatment light beam;
deflecting the treatment light beam and the imaging light beam, which have been aligned to each other, with a scanner that is under the control of a controller, the deflected treatment light beam configured to form a treatment pattern;
delivering the treatment light beam and the imaging light beam to the target tissue using a delivery system to form the treatment pattern;
measuring back reflections or scatter of the deflected imaging light beam from structures at or near the target tissue of the patient's eye; and
analyzing the back reflection or scatter of the imaging light beam, based on a pre-established calibration relationship that matches back reflections or scatters of the imaging light to focal positions of the treatment light, to identify a focal position of the treatment light beam,
wherein the target tissue is selected from the group consisting of the lens, lens capsule, cornea, limbus and sclera of the patient's eye.
2. The method of claim 1 , wherein the imaging light beam is an OCT light beam.
3. The method of claim 2 , wherein the OCT light beam has wavelengths between 800 and 1400 nm.
4. The method of claim 1 , further comprising: measuring a surface profile of a surface of the cornea of the patient's eye.
5. The method of claim 1 , further comprising: generating an aiming light beam, wherein the scanner is configured to deflect the aiming light beam to form an aiming pattern that is delivered to the target tissue and visually indicates a position of the treatment pattern on the patient's eye.
6. The method of claim 1 , further comprising:
capturing an image of the target tissue;
displaying the captured image; and
modifying a composition and location of the treatment pattern on the patient's eye.
7. The method of claim 1 , wherein the treatment light beam and the imaging light beam are delivered to the target tissue simultaneously.
8. A method for treating a target tissue in a patient's eye, comprising:
generating a treatment light beam;
generating an Optical Coherence Tomography (OCT) light beam with an OCT light source of an OCT system;
aligning the OCT light beam and the treatment light beam;
deflecting the treatment light beam and the OCT light beam, which have been aligned to each other, with a scanner under the control of a controller, the scanner being configured to form a treatment pattern;
delivering the treatment light beam to the target tissue using a delivery system to form the treatment pattern, and delivering the OCT light beam to the target tissue using the delivery system;
measuring back reflections or scatter of the deflected OCT light beam from structures at or near the target tissue of the patient's eye; and
analyzing the back reflection or scatter of the OCT light beam, based on a pre-established calibration relationship that matches back reflections or scatters of the OCT light to focal positions of the treatment light, to identify a focal position of the treatment light beam.
9. The method of claim 8 , where the target tissue is selected from the group consisting of the lens, lens capsule, cornea, limbus and sclera of the patient's eye.
10. The method of claim 8 , wherein the OCT light beam has wavelengths between 800 and 1400 nm.
11. The method of claim 8 , further comprising: measuring a surface profile of a surface of the cornea of the patient's eye.
12. The method of claim 8 , further comprising: generating an aiming light beam, and using the scanner to deflect the aiming light beam to form an aiming pattern that is delivered to the target tissue and visually indicates a position of the treatment pattern on the patient's eye.
13. The method of claim 8 , further comprising:
capturing an image of the target tissue;
displaying the captured image; and
modifying a composition and location of the treatment pattern on the patient's eye.
14. The method of claim 8 , wherein the treatment light beam and the imaging light beam are delivered to the target tissue simultaneously.