IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0193630
(2014-02-28)
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| 등록번호 |
US-9820886
(2017-11-21)
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발명자
/ 주소 |
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| 출원인 / 주소 |
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
0 인용 특허 :
45 |
초록
▼
Laser assisted cataract surgery methods and devices utilizing one or more treatment laser beams to create a shaped opening in the anterior lens capsule of the eye when performing a capsulorrhexis procedure. A light absorbing agent may optionally be added onto or into the lens capsule tissue, and the
Laser assisted cataract surgery methods and devices utilizing one or more treatment laser beams to create a shaped opening in the anterior lens capsule of the eye when performing a capsulorrhexis procedure. A light absorbing agent may optionally be added onto or into the lens capsule tissue, and the treatment laser wavelength selected to be strongly absorbed by the light absorbing agent. Alternatively, the treatment laser wavelength may be selected to be absorbed or strongly absorbed by the tissue itself, in which case no additional light absorbing agent need be used. Visualization patterns produced with one or more target laser beams may be projected onto the lens capsule tissue to aid in the procedure. The devices may be attached to or integrated with microscopes.
대표청구항
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1. A device for creating an opening in an anterior lens capsule of an eye, the device comprising: a treatment laser outputting a treatment laser beam;a two-dimensional scanner on which the treatment laser beam is incident, the scanner having a programmed scan profile for a predetermined treatment pa
1. A device for creating an opening in an anterior lens capsule of an eye, the device comprising: a treatment laser outputting a treatment laser beam;a two-dimensional scanner on which the treatment laser beam is incident, the scanner having a programmed scan profile for a predetermined treatment pattern in which the treatment laser beam is scanned to form a closed curve at the anterior lens capsule;a first lens positioned before the two-dimensional scanner along the optical path of the treatment laser beam; anda second lens positioned after the two-dimensional scanner along the optical path of the treatment laser beam;wherein the first lens focuses the treatment laser beam to a first waist at a first location between the two dimensional scanner and the second lens;wherein the second lens focuses the treatment laser beam to a second waist at a second location, different from the first location, at the anterior lens capsule and the treatment laser beam expands from its second waist to be defocused on the retina of the eye;wherein the treatment pattern passes through a treatment pattern waist at a third location, different from the first and second locations, between the second lens and the eye, the treatment pattern traced by the scanned treatment laser beam having a minimum radius at the treatment pattern waist, and the treatment pattern diverges in the eye and is consequently expanded in size and area on the retina compared to its size and area at the anterior lens capsule; andwherein the treatment laser beam has a wavelength absorbed by Trypan Blue or Indocyanine Green, a spot size at the anterior lens capsule of less than 300 microns, and a power of 300 milliwatts to 3000 milliwatts. 2. The device of claim 1, wherein the treatment pattern avoids the fovea on the retina. 3. The device of claim 1, wherein the treatment laser beam provides a fluence of less than or equal to 2000 J/cm2 along the closed curve of the treatment pattern at the anterior lens capsule and a fluence of less than or equal to 200 J/cm2 along a corresponding closed curve on the retina of the eye. 4. The device of claim 1, wherein the treatment laser beam provides a peak irradiance of less than or equal to 100,000 W/cm2 along the closed curve of the treatment pattern at the anterior lens capsule and a peak irradiance of less than or equal to 2000 W/cm2 along a corresponding closed curve on the retina of the eye. 5. The device of claim 1, wherein the treatment laser beam has a diameter of greater than or equal to 100 microns and less than 300 microns at the anterior lens capsule. 6. The device of claim 1, comprising a visualization laser outputting a visualization laser beam having a wavelength in the visible spectrum and incident on the two-dimensional scanner, wherein the scanner has a programmed scan profile in which the visualization laser beam is scanned to form a visualization pattern at the anterior lens capsule to facilitate aligning the treatment pattern on the anterior lens capsule. 7. The device of claim 6, wherein at least a portion of the visualization pattern indicates desired boundaries of the opening to be created in the anterior lens capsule, the desired boundaries of the opening differing in location from the closed curve of the treatment pattern. 8. The device of claim 6, wherein at least a portion of the visualization pattern corresponds to one or more anatomical features of the eye. 9. The device of claim 1, wherein the treatment laser is a continuous wave laser, the treatment laser beam is scanned along the closed curve in a single pass, and the power of the treatment laser beam is constant along the closed curve. 10. The device of claim 1, wherein scanning the treatment laser beam is completed in less than or equal to 10 seconds. 11. The device of claim 10, wherein scanning the treatment laser beam is completed in less than or equal to 5 seconds. 12. The device of claim 11, wherein scanning the treatment laser beam is completed in less than or equal to 1 second. 13. The device of claim 1, wherein the treatment laser beam is scanned from an initial point inside the closed curve toward the closed curve at a speed less than an average speed at which the treatment laser beam is subsequently scanned along the closed curve. 14. The device of claim 1, comprising a detection laser outputting a detection laser beam having a wavelength that is reflected by Trypan Blue or Indocyanine Green. 15. The device of claim 1, comprising a detection laser outputting a detection laser beam having a wavelength that excites fluorescence from Trypan Blue or Indocyanine Green. 16. The device of claim 1, arranged in combination with a surgical contact lens positioned on the eye to neutralize the focusing power of the cornea of the eye on the retina of the eye and refract the scanning pattern away from the fovea of the eye. 17. The device of claim 1, comprising a light detector onto which the scanner can direct the treatment beam to monitor the treatment beam power. 18. The device of claim 17, wherein the light detector is an array detector on which the scanner can scan the treatment beam to confirm operation of the scanner. 19. The device of claim 1, integrated with a microscope. 20. The device of claim 19, wherein the treatment beam optical path shares optical components with the microscope. 21. The device of claim 1, integrated with an aberrometer configured to make refractive measurements of the eye. 22. The device of claim 21, wherein the optical path of the aberrometer to the eye includes the scanner.
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