IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0141902
(2002-05-08)
|
우선권정보 |
DE-0024358 (2001-05-18) |
발명자
/ 주소 |
|
출원인 / 주소 |
- WaveLight Laser Technologie AG
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
7 |
초록
▼
A laser system serves for corneal grafting by photodisruptive laser cutting. To this end, short laser pulses within the range from 1 fs to 10 ns are positioned and guided in the cornea in such a way that the foci ( 20 ) of the laser pulses describe an incision path in the cornea ( 12 ) that exhibits
A laser system serves for corneal grafting by photodisruptive laser cutting. To this end, short laser pulses within the range from 1 fs to 10 ns are positioned and guided in the cornea in such a way that the foci ( 20 ) of the laser pulses describe an incision path in the cornea ( 12 ) that exhibits an undercut, so that a seal between the juxtaposed surfaces of the implant and of the residual cornea arises between a donor implant and the recipient cornea which is promoted by the overpressure of the eye
대표청구항
▼
1. A laser system for treatment of the human eye, comprisinga laser-beam source which emits laser pulses with wavelengths in respect of which the human cornea is transparent and with pulse-lengths within the nanosecond to femtosecond range,optical means for controlling the position and the focus ( 2
1. A laser system for treatment of the human eye, comprisinga laser-beam source which emits laser pulses with wavelengths in respect of which the human cornea is transparent and with pulse-lengths within the nanosecond to femtosecond range,optical means for controlling the position and the focus ( 20 ) of the laser pulses anda computer unit which is programmed in such a manner that it controls the optical means in such a way that, in relation to an optical axis of the cornea, the foci describe a path in the interior of the cornea which is guided about the axis and which exhibits in the axial direction at least one zigzag shaped undercut with a sealing surface which corresponds to at least 75% of the area of the optical zone of the cornea. 2. Laser system according to claim 1, wherein the sealing surface is larger than the area of the optical zone of the cornea. 3. Laser system according to claim 1, wherein the wavelength lies in the near-infrared. 4. Laser system according to claim 1, wherein the laser pulse-lengths lie within the range from 1 fs to 10 ns. 5. Laser system according to claim 1, wherein the program-controlled computer unit controls the path of the foci in such a way that the undercut sealing surface extends substantially radially in relation to the optical axis of the cornea. 6. Laser system according to claim 1, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an implant in the residual cornea assumes a stable position under the pressure within the eye. 7. Laser system according to claim 1, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an implant in the residual cornea assume a stable position under the pressure within the eye. 8. Laser system according to claim 2, wherein the wavelength lies in the near-infrared. 9. Laser system according to claim 2, wherein the laser pulse-lengths lie within the range from 1 fs to 10 ns. 10. Laser system according to claim 2, wherein the program-controlled computer unit controls the path of the foci in such a way that the undercut sealing surface extends substantially radially in relation to the optical axis of the cornea. 11. Laser system according to claim 2, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an implant in the residual cornea assume a stable position under the pressure within the eye. 12. Laser system according to claim 3, wherein the laser pulse-lengths lie within the range from 1 fs to 10 ns. 13. Laser system according to claim 3, wherein the program-controlled computer unit controls the path of the foci in such a way that the undercut sealing surface extends substantially radially in relation to the optical axis of the cornea. 14. Laser system according to claim 3, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an implant in the residual cornea assume a stable position under the pressure within the eye. 15. Laser system according to claim 4, wherein the program-controlled computer unit controls the path of the foci in such a way that the undercut sealing surface extends substantially radially in relation to the optical axis of the cornea. 16. Laser system according to claim 5, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an implant in the residual cornea assumes a stable position under the pressure within the eye. 17. A method for laser treatment of the human eye, comprisingproviding a laser-beam source which emits laser pulses with wavelengths in respect of which the human cornea is transparent and with pulse-lengths within the nanosecond to femtosecond range, andcontrolling the position and the focus of the laser pulses in such a manner in relation to an optical axis of the cornea, that the foci describe a path in the interior of the cornea which is guided about the axis and which exhibits in the axial direction at least one zigzag shaped undercut with a sealing surface which corresponds to at least 75% of the area of the optical zone of the cornea. 18. The method of claim 17, wherein said controlling includes providing a machine readable program with control instructions, and said controlling is performed in response to the machine readable program. 19. The method of claim 18, wherein the machine readable program defines the at least one zigzag shaped undercut. 20. A laser system for treatment of the human eye, comprisinga laser-beam source which emits laser pulses with wavelengths in respect of which the human cornea is transparent and with pulse-lengths within the nanosecond to femtosecond range,optical means for controlling the position and the focus of the laser pulses, anda computer unit which is programmed in such a manner that it controls the optical means in such a way that, in relation to an optical axis of the cornea, the foci describe a path in the interior of the cornea which is guided about the axis, by which a central portion of the cornea is completely cut out axially and which exhibits in the axial direction at least one undercut with a sealing surface which corresponds to at least 75% of the area of the optical zone of the cornea. 21. Laser system according to claim 20, wherein the sealing surface is larger than the area of the optical zone of the cornea. 22. Laser system according to claim 20, wherein the undercut is zigzag-shaped. 23. Laser system according to claim 20, wherein the wavelength lies in the near-infrared. 24. Laser system according to claim 20, wherein the laser pulse-lengths lie within the range from 1 fs to 10 ns. 25. Laser system according to claim 20, wherein the program-controlled computer unit controls the path of the foci in such a way that the undercut sealing surface extends substantially radially in relation to the optical axis of the cornea. 26. Laser system according to claim 20, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an implant in the residual cornea assumes a stable position under the pressure within the eye. 27. Laser system according to claim 21, wherein the undercut is zigzag-shaped. 28. Laser system according to claim 27, wherein the wavelength lies in the near-infrared. 29. Laser system according to claim 27, wherein the laser pulse-lengths lie within the range from 1 fs to 10 ns. 30. Laser system according to claim 28, wherein the laser pulse-lengths lie within the range from 1 fs to 10 ns. 31. Laser system according to claim 21, wherein the laser pulse-lengths lie within the range from 1 fs to 10 ns. 32. Laser system according to claim 21, wherein the program-controlled computer unit controls the path of the foci in such a way that the undercut sealing surface extends substantially radially in relation to the optical axis of the cornea. 33. Laser system according to claim 21, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an implant in the residual cornea assumes a stable position under the pressure within the eye. 34. Laser system according to claim 22, wherein the program-controlled computer unit controls the path of the foci in such a way that the undercut sealing surface extends substantially radially in relation to the optical axis of the cornea. 35. Laser system according to claim 23, wherein the program-controlled computer unit controls the path of the foci in such a way that the undercut sealing surface ( 34 ) extends substantially radially in relation to the optical axis of the cornea. 36. Laser system according to claim 22, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an imp lant in the residual cornea assumes a stable position under the pressure within the eye. 37. Laser system according to claim 23, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an implant in the residual cornea assumes a stable position under the pressure within the eye. 38. Laser system according to claim 24, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an implant in the residual cornea assumes a stable position under the pressure within the eye. 39. Laser system according to claim 25, wherein the program-controlled computer unit controls the path of the foci in such a way that the radial undercut ensures that an implant in the residual cornea assumes a stable position under the pressure within the eye. 40. A method for laser treatment of the human eye, comprisingproviding a laser-beam source which emits laser pulses with wavelengths in respect of which the human cornea is transparent and with pulse-lengths within the nanosecond to femtosecond range, andcontrolling the position and the focus of the laser pulses in such a manner in relation to an optical axis of the cornea that the foci describe a path in the interior of the cornea which is guided about the axis, by which a central portion of the cornea is completely cut out axially and which exhibits in the axial direction at least one undercut with a sealing surface which corresponds to at least 75% of the area of the optical zone of the cornea. 41. The method of claim 40, wherein said controlling includes providing a machine readable program with control instructions and said controlling is performed in response to the machine readable program. 42. The method of claim 41, wherein the machine readable program defines a substantially zigzag shaped undercut.
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