Claims
- 1. A method for aligning a diagnostic iris image of a patient's eye having a dilated pupil with a treatment iris image of the eye having a constricted pupil, via an iris pattern recognition technique, wherein an iris recognition landmark in the dilated pupil diagnostic image is not directly identifiable with the corresponding iris recognition landmark in the constricted pupil treatment iris image, characterized by:
visibly illuminating the patient's eye with a plurality of selected levels of visible illumination to effect a corresponding plurality of different pupil sizes ranging from a constricted pupil diameter to a dilated pupil diameter; respectively obtaining a sequential plurality of diagnostic iris images each of which has an indicia of the iris recognition landmark; correlating the indicia of the iris recognition landmark in each sequential diagnostic iris image such that the iris recognition landmark in the constricted pupil diagnostic iris image is identifiable with the iris recognition landmark in the dilated pupil diagnostic iris image; making a diagnostic measurement of the patient's eye and the associated diagnostic image when the pupil is dilated; obtaining a treatment iris image of the patient's eye having a constricted pupil; aligning the constricted diagnostic iris image with the constricted pupil treatment iris image.
- 2. The method of claim 1, further characterized by effecting an accurate laser treatment of the patient's eye that is derived from a diagnostic measurement associated with the dilated pupil and preferably adjusting the laser treatment on the eye based upon the iris alignment.
- 3. The method of claim 1 or 2, wherein making the diagnostic measurement includes obtaining an indication of a wavefront aberration and an axis of astigmatism.
- 4. The method of claim 3, wherein making the diagnostic measurement comprises using one of an elevation based topographer, optical raytracing, and an aberrometer.
- 5. The method of any of claims 1 to 4, wherein the aligning comprises correlating the dilated pupil diagnostic iris image with the constricted pupil diagnostic iris image and comparing an aligned constricted pupil diagnostic iris image with the constricted pupil treatment image.
- 6. The method of any of claims 1 to 4, wherein the aligning comprises comparing the plurality of diagnostic iris images with the treatment iris image to align the constricted pupil diagnostic iris image with the constricted pupil treatment iris image.
- 7. The method of any of claims 1 to 6, wherein the laser treatment is directed to one of a myopia correcting ablation, a hyperopia correcting ablation, an astigmatism correcting ablation, a custom corneal ablation, a retinal ablation, and another laser eye surgery procedure.
- 8. The method of claim 1 to 7, further characterized by
determining an illumination independent reference landmark on the eye; calculating a center position of the pupil with respect to the reference landmark associated with the dilated pupil diagnostic iris image; calculating a center position of the pupil with respect to the reference landmark associated with the constricted pupil diagnostic iris image; determining a vector displacement value for the constricted pupil center and the dilated pupil center; adjusting the laser treatment to be performed on the constricted pupil eye with respect to the vector displacement of the dilated pupil center.
- 9. The method of claim 8, wherein the illumination independent reference landmark is a portion of the limbus of the eye.
- 10. The method of claim 9, wherein the portion of the limbus is a limbal edge.
- 11. In a diagnostic and therapeutic system for laser eye surgery wherein a diagnostic image of a patient's eye that is obtained by a diagnostic image capture is aligned with a treatment image of the patient's eye that is obtained by a treatment image capture device that is associated with a treatment laser system, via an iris pattern recognition technique, the improvement characterized by:
an illumination control device for controlling a visible illumination level on one of the patient's eye being examined and the patient's other eye (not being examined) wherein the visible illumination level acts as a control for the pupil diameter of the examined eye; a sequential plurality of diagnostic iris images each including a different pupil diameter ranging between a dilated pupil size and a constricted pupil size corresponding to the controlled visible illumination level, wherein at least an indicia of an iris recognition landmark is identifiable in each sequential diagnostic iris image even though the corresponding iris recognition landmark is not identifiable between the constricted diagnostic pupil image and the dilated diagnostic pupil image; an eye diagnostic measuring device for obtaining a diagnostic measurement of the patient's eye associated with the dilated diagnostic pupil image, cooperatively associated with the illumination control device and the diagnostic image capture device; means for exporting at least one of the diagnostic iris images to the laser treatment system; and means for aligning the dilated pupil diagnostic iris image with the constricted pupil diagnostic iris image, and further for aligning the aligned constricted pupil diagnostic iris image with the treatment iris image having a constricted pupil of a size generally corresponding to the diagnostic image constricted pupil size.
- 12. The system of claim 11, wherein the means for aligning includes a treatment stage processor cooperatively engaged with the treatment image capture device.
- 13. In a diagnostic and therapeutic system for laser eye surgery wherein a diagnostic image of a patient's eye that is obtained by a diagnostic image capture device that is also adapted to make a diagnostic measurement of the patient's eye, is aligned with a treatment image of the patient's eye that is obtained by a treatment image capture device which is associated with a treatment laser system, via an iris pattern recognition technique,
- 14. The system of claim 13, wherein the means for aligning the dilated pupil diagnostic iris image with the constricted pupil diagnostic iris image includes a diagnostic stage processor cooperatively engaged with the diagnostic image capture device.
- 15. The system of any of claims 11 to 14, wherein the means for exporting includes at least one of a wired connection, a wireless connection, a computer file storage medium.
- 16. The system of any of claims 11 to 15, wherein the diagnostic measurement obtained by the eye diagnostic measuring device is suitable for obtaining a wavefront information about the patient's eye.
- 17. The system of any of claims 11 to 15, wherein the eye diagnostic measuring device includes the iris image capture device.
- 18. The system of any of claims 11 to 17, wherein the illumination control device is separate from the diagnostic measuring device.
- 19. The system of any of claims 11 to 17, wherein the illumination control device comprises a variable illumination fixation target and is an integrated component of the diagnostic measuring device.
- 20. The system of any of claims 11 to 19, wherein the improvement is further characterized by a means for obtaining a vector displacement measurement between a pupil center of the dilated pupil diagnostic image and the pupil center of the constricted pupil diagnostic image.
- 21. The system of any of claims 11 to 19, wherein the vector displacement measurement is a measurement from limbus reference position to the center of the pupil.
- 22. In an ocular diagnostic device for obtaining a diagnostic measurement of a patient's eye indicative of a wavefront aberration of the eye, and an iris image of the patient's eye associated with the diagnostic measurement, including an iris image capture component, a diagnostic measurement component and a visible illumination fixation source,
- 23. The device of claim 22, wherein said device is a pupilometer.
- 24. The device of claim 22, wherein said device is an aberrometer.
- 25. The device of claim 22, wherein said device is a corneal topographer.
Parent Case Info
[0001] This application is related to PCT EP00/10373.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/EP01/05354 |
5/10/2001 |
WO |
|
Provisional Applications (1)
|
Number |
Date |
Country |
|
60286954 |
Apr 2001 |
US |