CA2485692A1 - Variable repetition rate firing scheme for refractive laser systems - Google Patents

Variable repetition rate firing scheme for refractive laser systems Download PDF

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Publication number
CA2485692A1
CA2485692A1 CA002485692A CA2485692A CA2485692A1 CA 2485692 A1 CA2485692 A1 CA 2485692A1 CA 002485692 A CA002485692 A CA 002485692A CA 2485692 A CA2485692 A CA 2485692A CA 2485692 A1 CA2485692 A1 CA 2485692A1
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Canada
Prior art keywords
size
laser
firing rate
pulse
eye
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Granted
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CA002485692A
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French (fr)
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CA2485692C (en
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Jonathan Wong
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AMO Manufacturing USA LLC
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Individual
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Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F9/00802—Methods or devices for eye surgery using laser for photoablation
    • A61F9/00804—Refractive treatments
    • A61F9/00806—Correction of higher orders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/10—Computer-aided planning, simulation or modelling of surgical operations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00844—Feedback systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00844—Feedback systems
    • A61F2009/00846—Eyetracking
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00844—Feedback systems
    • A61F2009/00848—Feedback systems based on wavefront
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00861—Methods or devices for eye surgery using laser adapted for treatment at a particular location
    • A61F2009/00872—Cornea
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00878—Planning
    • A61F2009/0088—Planning based on wavefront
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F2009/00878—Planning
    • A61F2009/00882—Planning based on topography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/008—Methods or devices for eye surgery using laser
    • A61F9/00802—Methods or devices for eye surgery using laser for photoablation
    • A61F9/00817—Beam shaping with masks

Abstract

Systems (10) and methods apply pulsed laser energy to an eye with a pulsed laser system. The laser system (10) includes a pulsed laser (12), a laser be am delivery system (16) and at least one processor (22). The laser (12) makes a beam (14) of an ablative light energy. A dimension across the laser beam (14 ) varies during a treatment of the eye (E). A firing rate of the laser (12) varies as the dimension across the beam (14) varies during the treatment. Th e dimension across the beam and the firing rate of the laser (12) can be arranged so as to maintain a power of the beam (14) applied to the eye at a substantially constant level during at least a portion of the treatment. A firing rate of the laser (12) for each pulse may be listed in a treatment table (140).

Claims (26)

1. A method of treating an eye with a laser, the method comprising:
making a beam of an ablative light energy with the laser;
varying a dimension across the laser beam during a treatment of the eye; and varying a firing rate of the laser during the treatment in correlation with.the varying of the dimension across the beam.
2. The method of claim 1 wherein the varying of the dimension across the beam and the varying of the firing rate are arranged so as to maintain a power of the beam applied to the eye at a substantially constant level during at least a portion of the treatment.
3. The method of claim 1 wherein the dimension across the beam varies between a first size and a second size, an amount of energy applied to the eye with a first pulse of the laser beam being lower at the first size than an amount of energy applied to the eye with a second pulse of the laser beam at the second size, and wherein the firing rate varies between a first firing rate at the first size and a second rate at the second size, the first firing rate being faster than the second firing rate.
4. The method of claim 1 wherein the dimension across the beam varies between a first size and a second size, an amount of energy applied to the eye with a first pulse of the laser beam being higher at the first size than an amount of energy applied to the eye with a second pulse of the laser beam at the second size, and wherein the firing rate varies between a first firing rate at the first size and a second firing rate at the second size, the first rate being slower than the second firing rate.
5. The method of claim 1 further comprising scanning the laser beam over a treatment area of the eye.
6. The method of claim 1 wherein the dimension across the beam vanes by at least 0.5 mm during the ablative treatment.
7. The method of claim 3 wherein the dimension across the beam vanes by at least 3 mm during the ablative treatment.
8. The method of claim 1 wherein the firing rate of the laser varies by at least 2 Hz during the treatment.
9. The method of claim 8 wherein the firing rate of the laser varies by at least 10 Hz during the treatment.
10. The method of claim 1 wherein the laser is a pulsed laser, and the laser beam is a pulsed laser beam having a pulse duration.
11. The method of claim 10 further comprising a step of delaying the firing of the pulsed laser in response to predetermined value.
12. A method for treating an eye, the method comprising:
directing a series of corneal ablation laser pulses toward the eye, a first pulse having a first size and a second pulse having a second size which is smaller than the first size;
and varying a firing rate of the series in response to the sizes to effect a faster firing rate for the second pulse than during the first pulse.
13. A method for treating an eye, the method comprising:
directing a series of corneal ablation laser pulses toward the eye, a first pulse having a first size and a second pulse having a second size which is larger than the first size;
and varying a firing rate of the series in response to the sizes to effect a slower firing rate for the second pulse than for the first pulse.
14. A system for treating an eye with a laser beam, the system comprising:
a laser for making a beam of an ablative light energy;
at least one processor having a computer program adapted to vary a dimension across the laser beam during a treatment of the eye and vary a firing rate of the laser beam during the treatment in correlation with the dimension across the beam.
15. The system of claim 14 wherein the dimension across the beam and the firing rate of the laser are arranged so as to maintain a power of the beam applied to the eye at a substantially constant level during at least a portion of the treatment.
16. The system of claim 14 wherein the dimension across the beam varies between a first size and a second size, an amount of energy applied to the eye with a first pulse of the laser beam being lower at the first size than an amount of energy applied to the eye with a second pulse of the laser beam at the second size, and wherein the firing rate varies between a first firing rate at the first size and a second firing rate at the second size, the first firing rate being faster than the second firing rate.
17. The system of claim 14 wherein the dimension across the beam vanes between a first size and a second size, an amount of energy applied to the eye with a first pulse of the laser beam being higher at the first size than an amount of energy applied to the eye with a second pulse of the laser beam at the second size, and wherein the firing rate varies between a first firing rate at the first size and a second firing rate at the second size, the first firing rate being slower than the second firing rate.
18. The system of claim 14 wherein the computer program of the at least one processor is further adapted to scan the laser beam over a treatment area.
19. The system of claim 14 wherein the dimension across the beam varies by at least 0.5 mm during the ablative treatment.
20. The system of claim 19 wherein the dimension across the beam vanes by at least 3 mm during the ablative treatment.
21. The system of claim 14 wherein the firing rate of the laser varies by at least 2 Hz during the treatment.
22. The system of claim 21 wherein the firing rate of the laser varies by at least 10 Hz during the treatment.
23. The system of claim 14 wherein the laser is a pulsed laser, and the laser beam is a pulsed laser beam having a pulse duration.
24. The system of claim 23 wherein the processor further comprises a treatment table listing a predetermined delay between sequential pulses of the pulsed laser beam.
25. A laser eye surgery system for treating an eye, the system comprising:
a laser generating a series of laser pulses;
delivery optics varying a size of the pulses from a first pulse size to a second pulse size smaller than the first size; and a controller varying a firing rate of the laser at least in part in response to the pulse size so that the firing rate is faster during the second pulse size.
26. A laser eye surgery system for treating an eye, the system comprising:
a laser generating a series of laser pulses;
delivery optics varying a size of the pulses from a first pulse size to a second pulse size larger than the first size; and a controller varying a firing rate of the laser at least in part in response to the pulse size so that the firing rate is slower during the second pulse size.
CA2485692A 2002-05-30 2003-05-30 Variable repetition rate firing scheme for refractive laser systems Expired - Fee Related CA2485692C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US38462102P 2002-05-30 2002-05-30
US60/384,621 2002-05-30
PCT/US2003/017292 WO2003101326A1 (en) 2002-05-30 2003-05-30 Variable repetition rate firing scheme for refractive laser systems

Publications (2)

Publication Number Publication Date
CA2485692A1 true CA2485692A1 (en) 2003-12-11
CA2485692C CA2485692C (en) 2010-08-24

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Country Status (8)

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US (1) US7077838B2 (en)
EP (1) EP1507487B1 (en)
JP (1) JP2005527318A (en)
CN (1) CN1655729B (en)
CA (1) CA2485692C (en)
MX (1) MXPA04011718A (en)
TW (1) TWI310681B (en)
WO (1) WO2003101326A1 (en)

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Also Published As

Publication number Publication date
CA2485692C (en) 2010-08-24
US20050102008A1 (en) 2005-05-12
CN1655729B (en) 2010-04-28
CN1655729A (en) 2005-08-17
MXPA04011718A (en) 2005-02-14
EP1507487A1 (en) 2005-02-23
US7077838B2 (en) 2006-07-18
TW200307530A (en) 2003-12-16
EP1507487A4 (en) 2009-11-04
WO2003101326A1 (en) 2003-12-11
JP2005527318A (en) 2005-09-15
EP1507487B1 (en) 2013-06-12
TWI310681B (en) 2009-06-11

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