US20070005046A1 - Methods and apparatus for presbyopia correction using ultraviolet and infrared lasers - Google Patents

Methods and apparatus for presbyopia correction using ultraviolet and infrared lasers Download PDF

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US20070005046A1
US20070005046A1 US11/515,632 US51563206A US2007005046A1 US 20070005046 A1 US20070005046 A1 US 20070005046A1 US 51563206 A US51563206 A US 51563206A US 2007005046 A1 US2007005046 A1 US 2007005046A1
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tissue
laser
gap
conjunctiva
scleral
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J. Lin
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SurgiLight Inc
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Assigned to SURGILIGHT, INC. reassignment SURGILIGHT, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIN, JUI-TENG
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery
    • A61F9/008Methods or devices for eye surgery using laser
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery
    • A61F9/008Methods or devices for eye surgery using laser
    • A61F9/00802Methods or devices for eye surgery using laser for photoablation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery
    • A61F9/008Methods or devices for eye surgery using laser
    • A61F9/00802Methods or devices for eye surgery using laser for photoablation
    • A61F9/00804Refractive treatments
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery
    • A61F9/008Methods or devices for eye surgery using laser
    • A61F9/00802Methods or devices for eye surgery using laser for photoablation
    • A61F9/00804Refractive treatments
    • A61F9/00808Inducing higher orders, e.g. for correction of presbyopia
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery
    • A61F9/008Methods or devices for eye surgery using laser
    • A61F2009/00861Methods or devices for eye surgery using laser adapted for treatment at a particular location
    • A61F2009/00865Sclera
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery
    • A61F9/008Methods or devices for eye surgery using laser
    • A61F2009/00861Methods or devices for eye surgery using laser adapted for treatment at a particular location
    • A61F2009/00872Cornea
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery
    • A61F9/008Methods or devices for eye surgery using laser
    • A61F2009/00885Methods or devices for eye surgery using laser for treating a particular disease
    • A61F2009/00895Presbyopia
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery
    • A61F9/008Methods or devices for eye surgery using laser
    • A61F9/00802Methods or devices for eye surgery using laser for photoablation
    • A61F9/00817Beam shaping with masks
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F9/00Methods 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
    • A61F9/007Methods or devices for eye surgery
    • A61F9/008Methods or devices for eye surgery using laser
    • A61F9/00825Methods or devices for eye surgery using laser for photodisruption
    • A61F9/00838Correction of presbyopia

Definitions

  • the present invention relates to apparatus and methods for the treatment of presbyopia using ultraviolet and infrared lasers to ablate the sclera tissue of an eye.
  • Corneal reshaping including a procedure called photorefractive keratectomy (PRK) and a new procedure called laser assisted in situ keratomileusis, or laser intrastroma keratomileusis (LASIK), has been performed by lasers in the ultraviolet (UV) wavelength of 193-213 nm.
  • UV refractive lasers include ArF excimer lasers at 193 nm and other non-excimer, solid-state lasers, such as the one patented by the present inventor in 1992 (U.S. Pat. No. 5,144,630).
  • Precise, stable corneal reshaping requires lasers with strong tissue absorption (or minimum penetration depth) such that the thermal damage zone is at a minimum (less than few microns).
  • the present patent uses a “cold” laser to remove sclera tissue (outside the limbus area) versus a “thermal” lasers in Sand's patent (U.S. Pat. No. 5,484,432) to shrink the corneal shape (inside the limbus area).
  • the cold laser of the present has a wavelength range of (0.15-0.36) microns and (2.6-3.2) microns which are also different from that of the “thermal” laser range of (1.80-2.55) microns proposed by Sand.
  • the “presbyopia” correction proposed by Ruitz using an excimer (ArF) laser also required the corneal surface to be reshaped to form “multifocal” effort for a presbyopia patents to see near and far.
  • Ruitz's “presbyopia” correction is fundamentally different from that of the present patent which does not change the corneal curvature and only ablate the scleral tissue outside the limbus area.
  • the presbyopia patent is corrected by increasing patient's accommodation rather than reshaping the cornea into “multifocal”.
  • the important concept proposed in the present invention is to support the present inventor's post-operative results which show minimum regression.
  • one objective of the present invention is to provide an apparatus and method to obviate these drawbacks in the above described prior arts.
  • One important concept proposed in the present invention is to support the post-operative results which show minimum regression when presbyopia is corrected by a laser ablation for the sclera tissue.
  • the laser ablated sclera tissue “gap ” is filled in by the sub-conjunctiva tissue within few days after the surgery. This filled-in sub-conjunctiva tissue is much more flexible than the original sclera tissue. Therefore the flexible filled-in gap in the sclera area will allow the ciliary body to contract and cause the zonular fiber and the corneal lens to adjust its focusing power and increase the accommodation of presbyopic patient.
  • the concept presented in the present patent is to remove, by any methods including laser or non-laser methods, portion of the sclera tissue which is then filled in by sub-conjunctiva tissue to increase the flexibility of the scleral area and in turn causes the movement of the ciliary body and zonular fiber to increase the lens accommodation.
  • the preferred embodiments of the present surgical laser consists of a combination of an ablative-type laser and delivery unit.
  • the ablative-type laser has a wavelength range of from 0.15 to 0.35 microns and from 2.6 to 3.2 microns and is operated in a pulsed mode such that the thermal damage of the corneal tissue is minimized.
  • FIG. 1 is the schematic drawing of the anterposterior section through the anterior portion of a human eye showing the sclera, ciliary muscle, zonule and the lens.
  • FIG. 2 is a schematics of scleral ablation area outside the limbus.
  • FIG. 3 is a schematics of the structure of corneal including conjunctiva, sub-conjunctiva and sclera area ablated by laser.
  • FIG. 1 shows the lens of a human eye 12 connected to the sclera tissue 13 and the ciliary body 14 by zonule fibers 15 .
  • the lens power is given by contraction and expansion of the ciliary mussel 14 and the movement of the zonular fiber 15 connected to the lens 12 .
  • FIG. 2 shows the laser ablated sclera area outside the limbus 16 defined by the area between two circles, 17 and 18 , having diameter of about 10 mm and 18 mm.
  • Various ablation patterns within these two circle area are proposed in the present invention.
  • this ablated “gap” 19 will be filled in by the sub-conjunctiva tissue 21 which is much more flexible than the original sclera tissue 13 .
  • This filled in sub-conjunctiva 21 will allow the ciliary body 14 to contract or relax the zonular fiber 15 which is connected to the lens, when the presbyopic patient is adjusting his lens curvature to see near and far.
  • Ablation of the sclera 13 will cause the ciliary body 14 to contract and the lens 12 becomes more spherical in topography with a shorter radii of curvature for near objects.
  • the depth of the laser ablation needs to be approximately (60%-90%) of the sclera thickness which is about (500-700) microns.
  • the ablation depth should not cut through the choroid. It is therefore clinically important that the patient's sclera thickness be measured pre-operatively and the laser ablation depth controlled.
  • a scanning laser is used to control this depth by the number of scanning lines or pulses over the selected area at a given set of laser parameters.
  • the surgeon may observe the color change of the ablated sclera tissue to determine when the ablation depth reaches the interface of the sclera and the ciliary.
  • the ablation patterns can be any symmetric shapes around the limbus area, including radial lines, arc or curved line, dotted rings. These are examples only but it can be more or less without departing from the spirit and scope of the invention. Enhancement may be performed by adding more ablation lines.
  • the preferred embodiment of the beam spot sizes are about (0.1-2.0) mm on the cornea surface for a round beam and about (0.1-2.0) mm in width and (2.0-5.0) mm in length for a line-spot
  • These round and slit spots may be generated by a focusing spherical and a cylinder lens.
  • These beam spots may also be generated by a “mask” which blocks the laser beam and produce the desired patterns on the cornea surface.
  • the mask shall be made by non-transparent materials at the laser wavelength used for sclera ablation.
  • Ablation patterns described above may be generated by the preferred embodiment of the present system including a computer-controlled galvanometer, fiber-coupled hand piece (using a manual scan), motorized mirrors, refractive optics, reflecting mirror and any a translation device.
  • a mask having various “holes” or “slits” may also be used to generate various patterns proposed in the present invention.
  • the sclera tissue is permanently removed by the ablative lasers and filled in by the sub-conjunctiva tissues.
  • the preferred embodiment of the laser in the proposed system includes an ablative laser such as a Er:YAG laser; Er:YSGG laser; an optical parametric oscillation (OPO) laser at (2.6-3.2) microns; a gas laser with a wavelength of (2.6-3.2) microns; an excimer laser of ArF at 193 nm; a XeCl excimer laser at 308 nm; a frequency-shifted solid state laser at (0.15-3.2) microns; the harmonic generation of Nd:YAG or Nd:YLF or Ti:sapphire laser at wavelength of about (190-220) nm; a CO laser at about 6.0 microns and a carbon dioxide laser at 10.6 microns; a diode laser at (0.8-2.1) microns, or any other gas or solid state lasers including flash-lamp and diode-laser pumped, at (0.5-6.0) microns spectra range.
  • an ablative laser such as a Er:YAG laser
  • the preferred embodiments of FIG. 1 shall require the ablative laser to meet the peaks of tissue absorption spectra such as 0.98, 1.5, 2.1, 2.94 and 6.0 microns.
  • tissue absorption spectra such as 0.98, 1.5, 2.1, 2.94 and 6.0 microns.
  • the preferred embodiment of the laser should also include the short pulse lasers having wavelength of about (0.5-1.4) microns, such as Nd:YAG or Nd:YLF laser and their second harmonics operated in the range of picosecond or femtosecond pulse width.
  • These short pulse lasers shall be able to remove sclera tissue and conjunctiva tissue easily by focusing the laser beam on the surface of the tissue to be removed.
  • Another preferred embodiment of the present laser system is to tightly focused underneath the conjunctiva layer and selectively ablate the sclera tissue without damage or removing the conjunctiva tissue. Focused spot size of about (1-500) microns and accurate laser position of the depth will be needed for the procedure.
  • the tissue reaction is not critical to the wavelength when the laser highly focused and achieve a high fluency level such that tissue can be removed by interruption process.
  • Another preferred embodiment is to use an optical fiber or an articulate arm to deliver the ablative laser beams such that the presbyopia treatment may be conducted manually without the need of a scanner or reflecting mirrors.
  • a fiber tip connected to the fiber hand piece is preferred such that sterilization may be done only on the fiber tip.
  • the concept presented in the present patent is to remove, by any methods laser or non-laser, portion of the sclera tissue which is filled in by sub-conjunctiva tissue to increase the flexibility of the scleral area and in turn causes the zonular fiber to increase the lens accommodation. Therefore the laser ablation effects on the scleral tissue may also be conducted by any non-laser methods such as using a diamond knife which removes the scleral tissue at a width about (0.5-2.0) mm and length of (2.0-4.0) mm, as far as this area can be filled in by the sub-conjunctiva tissue.
  • Another important concept proposed in the present invention is to support the post-operative results which show minimum regression.
  • the laser ablated sclera tissue “gap” will be filled in by the sub-conjunctiva tissue within few days after the surgery. This filled in sub-conjunctiva tissue is much more flexible than the original sclera tissue. Therefore the filled-in gap in the sclera area will cause the underlying ciliary body to contract or expand the zonular fiber and the lens when the presbyopic patient is adjusting the corneal lens power to see near and far.
  • the conjunctiva To remove the sclera tissue, we typically open the conjunctiva first such that the underlying laser ablated area may be protected by the conjunctiva during the healing period.
  • the preferred embodiment is to use mechanical method such as a knife or a scissors.
  • the same ablative laser for sclera tissue ablation may be used to open (ablate) the conjunctiva.
  • Another preferred embodiment is to couple the laser to a fiber which has a fiber tip having a size about (0.2-0.5) mm and can easily penetrate into the conjunctiva layer and ablate the sclera tissue underneath. Without opening the conjunctiva, the laser ablation procedure will be much less invasive to the cornea, because most of the bleeding during the procedure is caused by cutting the conjunctiva.

Abstract

Presbyopia is treated by a system using various lasers to remove a portion of the scleral tissue and increase the accommodation of the presbyopic patient's eye. Stable accommodation is achieved by the filling of the sub-conjunctiva tissue to the laser-ablated scleral areas. The proposed laser wavelength ranges from ultraviolet to infrared of (0.15-0.36) microns, (0.5-1.4) microns and (0.9-3.2) microns. Both scanning and fiber delivered systems are proposed to generate the ablation patterns. Laser ablation of the sclera may be conducted with or without opening the conjunctiva layer.

Description

  • This application is a continuation of application Ser. No. 09/820,832 (filed 30 Mar. 2001), which is a continuation-in-part of application Ser. No. 09/303,673 (filed 3 May 1999).
  • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to apparatus and methods for the treatment of presbyopia using ultraviolet and infrared lasers to ablate the sclera tissue of an eye.
  • 2. Prior Art
  • Corneal reshaping, including a procedure called photorefractive keratectomy (PRK) and a new procedure called laser assisted in situ keratomileusis, or laser intrastroma keratomileusis (LASIK), has been performed by lasers in the ultraviolet (UV) wavelength of 193-213 nm. Commercial UV refractive lasers include ArF excimer lasers at 193 nm and other non-excimer, solid-state lasers, such as the one patented by the present inventor in 1992 (U.S. Pat. No. 5,144,630). Precise, stable corneal reshaping requires lasers with strong tissue absorption (or minimum penetration depth) such that the thermal damage zone is at a minimum (less than few microns). Furthermore, accuracy of the procedure of vision correction depends on the amount of tissue removed in each laser pulse, in the order of about 0.2 microns. Therefore, lasers at UV wavelengths between 193 and 213 nm and at the mid-infrared wavelengths between 2.8 and 3.2 microns are two attractive wavelength ranges which match the absorption peak of protein and water, respectively.
  • The above-described prior arts are however limited to the use of reshaping the corneal surface curvature for the correction of myopia, astigmatism and hyperopia. When a person reaches a certain age (around 45), the eyes start to lose their capability to focus for near vision and becomes presbyopia. Presbyopic problem is not due to the cornea curvature but comes about as the lens loses its ability to accommodate or focus for near vision as a result of loss of elasticity that is inevitable as people age. Therefore the existing lasers using corneal reshaping can not provide the solution for presbyopia patients. In addition, corneal reshaping is ablating the central portion of trhe corneal and change its curvature.
  • To correct presbyopia, the present patent uses a “cold” laser to remove sclera tissue (outside the limbus area) versus a “thermal” lasers in Sand's patent (U.S. Pat. No. 5,484,432) to shrink the corneal shape (inside the limbus area). The cold laser of the present has a wavelength range of (0.15-0.36) microns and (2.6-3.2) microns which are also different from that of the “thermal” laser range of (1.80-2.55) microns proposed by Sand.
  • The prior arts of Ruitz (U.S. Pat. No. 5,533,997) and Lin (U.S. Pat. No. 5,520,679) are all limited to the corneal central portion and are designed to change the curvature of the cornea by ablation the surface layer of the cornea. The present patent, on the contrary, does not change the corneal central curvature and only ablating tissue outside the limbus.
  • The technique used in the prior art of Bille (U.S. Pat. No. 4,907,586) is specified to below conditions: (a) quasi continuous laser having pulse duration less than 10 picoseconds and focused spot less than 10 micron diameter; (b) the laser is confined to the interior of a selected tissue to correct myopia, hyperopia or astigmatism, and (c) the laser is focused into the lens of an eye to prevent presbyopia. He also proposed to use laser to create a cavity within the corneal stroma to change its visco-elastic properties.
  • The “presbyopia” correction proposed by Ruitz using an excimer (ArF) laser also required the corneal surface to be reshaped to form “multifocal” effort for a presbyopia patents to see near and far. However, Ruitz's “presbyopia” correction is fundamentally different from that of the present patent which does not change the corneal curvature and only ablate the scleral tissue outside the limbus area. In the presnt patent, we propose that the presbyopia patent is corrected by increasing patient's accommodation rather than reshaping the cornea into “multifocal”.
  • To treat presbyopic patients, or the reversal of presbyopia, using the concept of expanding the sclera by mechanical devices or implantation of a band has been proposed by Schachar in U.S. Pat. Nos. 5,489,299, 5,722,952, 5,465,737 and 5,354,331. These mechanical approaches have the drawbacks of complexity and are time consuming, costly and have potential side effects. To treat presbyopia, the Schachar Pat. Nos. 5,529,076 and 5,722,952 propose the use of heat or radiation on the corneal epithelium to arrest the growth of the crystalline lens and also propose the use of lasers to ablate portions of the thickness of the sclera. However, these prior arts do not present any details or practical methods or laser parameters for the presbyopic corrections. No clinical studies have been practiced to show the effectiveness of the proposed concepts. The concepts proposed in the Schachar patents regarding lasers suitable for ablating the sclera tissues were incorrect because many of his proposed lasers are thermal lasers which will cause thermal burning of the cornea, rather than tissue ablation. Furthermore, the clinical issues, such as locations, patterns and depth of the sclera tissue removal were not indicated in these prior patents. In addition, Schachar's methods also require the weakening of the sclera and increase the lens diameter by band expansion, which is different from the theory proposed in the present patent, where the sclera tissue becomes more flexible than weakening after laser ablation.
  • Another prior art proposed by Spencer Thornton, Chapter 4, “Survey for hyperopia and presbyopia”, edited by Neal Sher (Williams & Wilkins, MD, 1997) is to use a diamond knife to incise radial cuts around the limbus areas. It requires a deep (90%-98%) cut of the sclera tissue in order to obtain accommodation of the lens. This method, however, involves a lot of bleeding and is difficult to control the depth of the cut which requires extensive surgeon's skill. Another major drawback for presbyopia correction provided by the above-described non-laser methods is the post-operative regression of about (30%-80%) caused by the healing of the “incision” gap. And this regression is minimum in the laser “excision” or “ablation” method proposed in the present invention.
  • The important concept proposed in the present invention is to support the present inventor's post-operative results which show minimum regression. We proposed a theory based upon the fact that the laser ablated sclera tissue “gap” will be filled in by the sub-conjunctiva tissue within few days after the surgery. This filled in sub-conjunctiva tissue is much more flexible than the original sclera tissue. Therefore the filled-in gap in the sclera area will cause the underlying ciliary body to have more space to move. This in turn will allow the ciliary body to contract or expand the zonular fiber which is connected to the lens, when the presbyopic patient is adjusting his lens curvature to see near and far. The above described sub-conjunctiva tissue filling effects and the increase of “flexibility” of the sclera area are fundamentally different from the scleral “expansion” (or weakening) concept proposed by the prior arts of Schachar who proposed an implanted slceral band. In the present invention, the laser ablated sclera area is not weakening, it becomes more flexible instead.
  • Therefore one objective of the present invention is to provide an apparatus and method to obviate these drawbacks in the above described prior arts.
  • It is yet another objective of the present invention to use a scanning device such that the degree of ciliary mussel accommodation can be controlled by the location, size and shapes of the removed sclera tissue.
  • It is yet another objective of the present invention to define the non-thermal lasers for efficient tissue ablation.
  • It is yet another objective of the present invention to define the optimal laser parameters and the ablation patterns for best clinical outcome for presbyopia patients, where sclera ablation will increase the accommodation of the ciliary mussel by the increase of the flexibility in the laser ablated areas.
  • It is yet another objective of the present invention to provide the appropriate scanning patterns which will cause effective ciliary body contraction and expansion on the zonules and the corneal lens based upon a theory different from the prior arts.
  • It is yet another objective of the present invention to provide a new mechanism which supports the clinical results of laser presbyopia correction with minimum regression. One important concept proposed in the present invention is to support the post-operative results which show minimum regression when presbyopia is corrected by a laser ablation for the sclera tissue. We proposed that the laser ablated sclera tissue “gap ” is filled in by the sub-conjunctiva tissue within few days after the surgery. This filled-in sub-conjunctiva tissue is much more flexible than the original sclera tissue. Therefore the flexible filled-in gap in the sclera area will allow the ciliary body to contract and cause the zonular fiber and the corneal lens to adjust its focusing power and increase the accommodation of presbyopic patient.
  • The concept presented in the present patent is to remove, by any methods including laser or non-laser methods, portion of the sclera tissue which is then filled in by sub-conjunctiva tissue to increase the flexibility of the scleral area and in turn causes the movement of the ciliary body and zonular fiber to increase the lens accommodation.
  • SUMMARY OF THE INVENTION
  • The preferred embodiments of the present surgical laser consists of a combination of an ablative-type laser and delivery unit. The ablative-type laser has a wavelength range of from 0.15 to 0.35 microns and from 2.6 to 3.2 microns and is operated in a pulsed mode such that the thermal damage of the corneal tissue is minimized.
  • It is yet another preferred embodiment of the present surgical laser to provide a scanning mechanism to effectively ablate the sclera tissue at a controlled depth by beam overlapping or by controlling the number of laser pulses acting on the sclera.
  • It is yet another embodiment of the present surgical laser to provide an integration system in which the ablative laser may be delivered by a scanner or by a fiber-coupled device which can be manually scanned over the cornea.
  • It is yet another embodiment of the present surgical laser to focus the laser beams to generate the sclera ablation patterns in radial lines, curved lines, dotted rings, or a slit pattern.
  • It is yet another embodiment of the present surgical laser to provide an integration system in which the sclera ablation leads to the increase of the accommodation of the ciliary muscle for the treatment of presbyopia.
  • Further preferred embodiments of the present surgical laser will become apparent from the description of the invention which follows.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is the schematic drawing of the anterposterior section through the anterior portion of a human eye showing the sclera, ciliary muscle, zonule and the lens.
  • FIG. 2 is a schematics of scleral ablation area outside the limbus.
  • FIG. 3 is a schematics of the structure of corneal including conjunctiva, sub-conjunctiva and sclera area ablated by laser.
  • DETAILED DESCRIPTION OF THE INVENTION AND THE PREFERRED EMBODIMENTS
  • FIG. 1 shows the lens of a human eye 12 connected to the sclera tissue 13 and the ciliary body 14 by zonule fibers 15. The lens power is given by contraction and expansion of the ciliary mussel 14 and the movement of the zonular fiber 15 connected to the lens 12.
  • FIG. 2 shows the laser ablated sclera area outside the limbus 16 defined by the area between two circles, 17 and 18, having diameter of about 10 mm and 18 mm. Various ablation patterns within these two circle area are proposed in the present invention.
  • Based on the proposed theory of the present invention and as shown in FIG. 3, when a portion of the sclera tissue 13 is removed by an ablative laser, this ablated “gap” 19 will be filled in by the sub-conjunctiva tissue 21 which is much more flexible than the original sclera tissue 13. This filled in sub-conjunctiva 21 will allow the ciliary body 14 to contract or relax the zonular fiber 15 which is connected to the lens, when the presbyopic patient is adjusting his lens curvature to see near and far. Ablation of the sclera 13 will cause the ciliary body 14 to contract and the lens 12 becomes more spherical in topography with a shorter radii of curvature for near objects. The reversed process of ciliary muscle relaxation will cause a longer radii of curvature for distant objects. Therefore, laser ablation of the sclera tissue will increase the accommodation of the ciliary body for the presbyopic patient to see both near and distance. Typically, we open the conjunctiva tissue 20 first and then ablate the sclera tissue 13. The conjunctiva 20 and sub-conjunctiva 21 layers may be remove mechanically by the same laser used for scleral ablation.
  • For efficient accommodation, the depth of the laser ablation needs to be approximately (60%-90%) of the sclera thickness which is about (500-700) microns. For safety reasons, the ablation depth should not cut through the choroid. It is therefore clinically important that the patient's sclera thickness be measured pre-operatively and the laser ablation depth controlled. A scanning laser is used to control this depth by the number of scanning lines or pulses over the selected area at a given set of laser parameters. Alternatively, the surgeon may observe the color change of the ablated sclera tissue to determine when the ablation depth reaches the interface of the sclera and the ciliary.
  • The ablation patterns can be any symmetric shapes around the limbus area, including radial lines, arc or curved line, dotted rings. These are examples only but it can be more or less without departing from the spirit and scope of the invention. Enhancement may be performed by adding more ablation lines. The preferred embodiment of the beam spot sizes are about (0.1-2.0) mm on the cornea surface for a round beam and about (0.1-2.0) mm in width and (2.0-5.0) mm in length for a line-spot These round and slit spots may be generated by a focusing spherical and a cylinder lens. These beam spots may also be generated by a “mask” which blocks the laser beam and produce the desired patterns on the cornea surface. The mask shall be made by non-transparent materials at the laser wavelength used for sclera ablation.
  • Ablation patterns described above may be generated by the preferred embodiment of the present system including a computer-controlled galvanometer, fiber-coupled hand piece (using a manual scan), motorized mirrors, refractive optics, reflecting mirror and any a translation device. A mask having various “holes” or “slits” may also be used to generate various patterns proposed in the present invention.
  • We are able to calibrate the ablation rate of various lasers on the sclera tissue by comparing the clinical data. To avoid the post-operative regression, the sclera tissue is permanently removed by the ablative lasers and filled in by the sub-conjunctiva tissues.
  • The preferred embodiment of the laser in the proposed system includes an ablative laser such as a Er:YAG laser; Er:YSGG laser; an optical parametric oscillation (OPO) laser at (2.6-3.2) microns; a gas laser with a wavelength of (2.6-3.2) microns; an excimer laser of ArF at 193 nm; a XeCl excimer laser at 308 nm; a frequency-shifted solid state laser at (0.15-3.2) microns; the harmonic generation of Nd:YAG or Nd:YLF or Ti:sapphire laser at wavelength of about (190-220) nm; a CO laser at about 6.0 microns and a carbon dioxide laser at 10.6 microns; a diode laser at (0.8-2.1) microns, or any other gas or solid state lasers including flash-lamp and diode-laser pumped, at (0.5-6.0) microns spectra range. To achieve the ablation of the sclera tissue at the preferred laser spot size of (0.1-2.0) mm requires an ablative laser energy per pulse of about (0.1-30) mJ depending on the pulse duration and the laser beam spot size.
  • For a typical pulse laser width of 100 nanoseconds to 500 microseconds, the preferred embodiments of FIG. 1 shall require the ablative laser to meet the peaks of tissue absorption spectra such as 0.98, 1.5, 2.1, 2.94 and 6.0 microns. However, for the case of lasers with a very short pulse of about from 1 femtosecond to 100 picoseconds, the laser wavelength becomes non-critical in the tissue interaction and the high peak laser intensity with small laser spot are more important. Therefore, The preferred embodiment of the laser should also include the short pulse lasers having wavelength of about (0.5-1.4) microns, such as Nd:YAG or Nd:YLF laser and their second harmonics operated in the range of picosecond or femtosecond pulse width. These short pulse lasers shall be able to remove sclera tissue and conjunctiva tissue easily by focusing the laser beam on the surface of the tissue to be removed. Another preferred embodiment of the present laser system is to tightly focused underneath the conjunctiva layer and selectively ablate the sclera tissue without damage or removing the conjunctiva tissue. Focused spot size of about (1-500) microns and accurate laser position of the depth will be needed for the procedure. We noted that the tissue reaction is not critical to the wavelength when the laser highly focused and achieve a high fluency level such that tissue can be removed by interruption process. Another preferred embodiment is to use an optical fiber or an articulate arm to deliver the ablative laser beams such that the presbyopia treatment may be conducted manually without the need of a scanner or reflecting mirrors. For the fiber delivered system, a fiber tip connected to the fiber hand piece is preferred such that sterilization may be done only on the fiber tip.
  • The concept presented in the present patent is to remove, by any methods laser or non-laser, portion of the sclera tissue which is filled in by sub-conjunctiva tissue to increase the flexibility of the scleral area and in turn causes the zonular fiber to increase the lens accommodation. Therefore the laser ablation effects on the scleral tissue may also be conducted by any non-laser methods such as using a diamond knife which removes the scleral tissue at a width about (0.5-2.0) mm and length of (2.0-4.0) mm, as far as this area can be filled in by the sub-conjunctiva tissue.
  • Another important concept proposed in the present invention is to support the post-operative results which show minimum regression. We proposed that the laser ablated sclera tissue “gap” will be filled in by the sub-conjunctiva tissue within few days after the surgery. This filled in sub-conjunctiva tissue is much more flexible than the original sclera tissue. Therefore the filled-in gap in the sclera area will cause the underlying ciliary body to contract or expand the zonular fiber and the lens when the presbyopic patient is adjusting the corneal lens power to see near and far.
  • To remove the sclera tissue, we typically open the conjunctiva first such that the underlying laser ablated area may be protected by the conjunctiva during the healing period. The preferred embodiment is to use mechanical method such as a knife or a scissors. Alternatively, the same ablative laser for sclera tissue ablation may be used to open (ablate) the conjunctiva. Another preferred embodiment is to couple the laser to a fiber which has a fiber tip having a size about (0.2-0.5) mm and can easily penetrate into the conjunctiva layer and ablate the sclera tissue underneath. Without opening the conjunctiva, the laser ablation procedure will be much less invasive to the cornea, because most of the bleeding during the procedure is caused by cutting the conjunctiva.
  • The invention having now been fully described, it should be understood that it may be embodied in other specific forms or variations without departing from the spirit or essential characteristics of the present invention. Accordingly, the embodiments described herein are to be considered to be illustrative and not restrictive.

Claims (21)

1. A laser beam ophthalmic surgery method for treating a presbyopic patient, the method comprising:
opening a subconjunctiva tissue of an eye of the patient; and
forming at least one gap in a scleral tissue of the eye by removing a portion of the scleral tissue of the eye with laser ablation to a depth between approximately 60% and approximately 90% of the sclera tissue thickness, wherein the laser is a cold laser so as to allow the patient's subconjunctiva tissue to fill in the at least one gap.
2. The method of claim 1, wherein no implant is implanted into the at least one gap.
3. The method of claim 1, wherein the subconjunctiva tissue filled into the at least one gap has a greater flexibility than the scleral tissue.
4. The method of claim 1, further comprising performing a measurement of the patient's scleral thickness.
5. The method of claim 1, further comprising performing a measurement of the patient's scleral thickness, wherein the measurement comprises observing a color change of the scleral tissue.
6. The method of claim 1, wherein forming the at least one gap comprises using a cold laser having a wavelength between about 0.15 μm and about 0.36 μm, or between about 2.6 μm and about 3.2 μm.
7. The method of claim 1, wherein:
forming the at least one gap comprises forming at least 3 radial lines around the cornea outside the limbus;
each radial line has a width between about 0.1 mm and about 1.0 mm; and
each radial line has a length between about 2.0 mm and about 5.0 mm.
8. The method of claim 1, wherein the at least one gap is formed in an area outside the limbus and between two circles having a diameter of about 10 mm and about 18 mm.
9. The method of claim 1, wherein forming the at least one gap comprises forming at least 3 curved lines around the cornea outside the limbus.
10. The method of claim 1, wherein:
forming the at least one gap comprises forming a dotted ring pattern around the cornea outside the limbus; and
each dot has a diameter between about 0.1 mm and about 2.0 mm.
11. The method of claim 1, wherein the at least one gap comprises a pattern generated by a device selected from the group consisting of a scanning mechanism, a fiber-coupled device, and a translation device.
12. The method of claim 1, wherein the at least one gap comprises a pattern generated by a mask that is not transparent to the laser.
13. A method of treating a presbyopic eye using a laser beam, the method comprising:
using the laser beam to form a gap in scleral tissue of the presbyopic eye, the gap having a depth of between about 500 μm and about 700 μm;
allowing conjunctiva tissue of the eye to fill the gap, such that accommodation of the presbyopic eye increases via movement of ciliary body and zonular fiber connected to the lens of the presbyopic eye.
14. The method of claim 13, wherein allowing conjunctiva tissue of the eye to fill the gap comprises not implanting an implant into the gap.
15. The method of claim 13, further comprising measuring a thickness of the scleral tissue before allowing the conjunctiva tissue to fill the gap.
16. The method of claim 13, further comprising opening conjunctiva tissue of the eye before using the laser beam to form a gap in the scleral tissue.
17. The method of claim 13, wherein the gap is formed in the scleral tissue without opening the conjunctiva.
18. The method of claim 13, wherein the laser beam is a short pulse solid state laser having a wavelength between about 0.5 μm and about 1.4 μm, and having a pulse width of between about one femtosecond and about one nanosecond.
19. The method of claim 13, wherein the laser beam is focused to a spot size between about 1 μm and about 500 μm to selectively remove scleral tissue underneath the conjunctiva layer.
20. The method of claim 13, wherein the laser is a cold laser.
21. The method of claim 13, wherein the conjunctiva tissue filled into the gap has a greater flexibility than the scleral tissue.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080091266A1 (en) * 2006-07-11 2008-04-17 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US20080125677A1 (en) * 2005-04-22 2008-05-29 Biolase Technology, Inc. Methods for treating hyperopia and presbyopia via laser tunneling
US20080125676A1 (en) * 2006-04-24 2008-05-29 Biolase Technology, Inc. Methods for treating hyperopia and presbyopia via laser tunneling
US20100152848A1 (en) * 2008-11-19 2010-06-17 Refocus Group, Inc. Artificial intraocular lens, altered natural crystalline lens, or refilled natural crystalline lens capsule with one or more scleral prostheses for improved performance
US8911496B2 (en) 2006-07-11 2014-12-16 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7655002B2 (en) 1996-03-21 2010-02-02 Second Sight Laser Technologies, Inc. Lenticular refractive surgery of presbyopia, other refractive errors, and cataract retardation
USRE40002E1 (en) 1998-11-10 2008-01-15 Surgilight, Inc. Treatment of presbyopia and other eye disorders using a scanning laser system
US20010029363A1 (en) * 1999-05-03 2001-10-11 Lin J. T. Methods and apparatus for presbyopia correction using ultraviolet and infrared lasers
JP4571773B2 (en) 2000-05-08 2010-10-27 イオプティマ リミテッド Non-perforated filtration surgery
JP4863584B2 (en) * 2001-09-10 2012-01-25 株式会社ニデック Ophthalmic laser surgery device
EP1448124A1 (en) * 2001-11-15 2004-08-25 Optotech Ltd. Non-penetrating filtration surgery
FR2842413B1 (en) * 2002-07-18 2005-06-03 Univ Lille Sciences Tech APPARATUS FOR THE TREATMENT OF AGE-RELATED MACULAR DEGENERATION (AMD)
US20040078030A1 (en) * 2002-10-16 2004-04-22 J. T. Lin Methods and apparatus for presbyopia treatment using a dual-function laser system
US20050043722A1 (en) * 2003-08-22 2005-02-24 Lin J. T. Methods and apparatus for treatment of eye disorders using articulated-arm-coupled ultraviolet lasers
US20070055220A1 (en) * 2003-11-14 2007-03-08 Jui-Teng Lin Methods and systems for treating presbyopia via laser ablation
CA2605018A1 (en) * 2005-03-15 2006-09-21 Annmarie Hipsley System and method for treating connective tissue
CA2606200C (en) 2005-04-26 2014-01-28 Biolase Technology, Inc. Methods for treating eye conditions
US9375349B2 (en) 2006-01-20 2016-06-28 Lensar, Llc System and method for providing laser shot patterns to the lens of an eye
US9889043B2 (en) 2006-01-20 2018-02-13 Lensar, Inc. System and apparatus for delivering a laser beam to the lens of an eye
US9545338B2 (en) 2006-01-20 2017-01-17 Lensar, Llc. System and method for improving the accommodative amplitude and increasing the refractive power of the human lens with a laser
US10842675B2 (en) 2006-01-20 2020-11-24 Lensar, Inc. System and method for treating the structure of the human lens with a laser
US8262646B2 (en) 2006-01-20 2012-09-11 Lensar, Inc. System and method for providing the shaped structural weakening of the human lens with a laser
US20070203478A1 (en) * 2006-02-21 2007-08-30 Herekar Satish V Method and system for elasto-modulation of ocular tissue
US8544473B2 (en) * 2006-04-26 2013-10-01 Biolase, Inc. Methods for treating eye conditions with low-level light therapy
US8479745B2 (en) 2006-04-26 2013-07-09 Biolase, Inc. Methods and devices for treating presbyopia
US8480659B2 (en) 2008-07-25 2013-07-09 Lensar, Inc. Method and system for removal and replacement of lens material from the lens of an eye
US8500723B2 (en) 2008-07-25 2013-08-06 Lensar, Inc. Liquid filled index matching device for ophthalmic laser procedures
AU2009342284B2 (en) * 2009-03-17 2013-10-24 Alcon Inc. Laser device for ophthalmology
US9492231B2 (en) * 2009-07-14 2016-11-15 Brian Cisell Laser surgery device and method
US8617146B2 (en) 2009-07-24 2013-12-31 Lensar, Inc. Laser system and method for correction of induced astigmatism
US8758332B2 (en) 2009-07-24 2014-06-24 Lensar, Inc. Laser system and method for performing and sealing corneal incisions in the eye
US8382745B2 (en) 2009-07-24 2013-02-26 Lensar, Inc. Laser system and method for astigmatic corrections in association with cataract treatment
US8465478B2 (en) 2009-07-24 2013-06-18 Lensar, Inc. System and method for performing LADAR assisted procedures on the lens of an eye
EP2774587B1 (en) 2010-01-08 2021-10-20 AMO Development, LLC System for modifying eye tissue and intraocular lenses
US10085886B2 (en) 2010-01-08 2018-10-02 Optimedica Corporation Method and system for modifying eye tissue and intraocular lenses
EP2531089B1 (en) 2010-02-01 2023-04-05 LENSAR, Inc. Purkinjie image-based alignment of suction ring in ophthalmic applications
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USD695408S1 (en) 2010-10-15 2013-12-10 Lensar, Inc. Laser system for treatment of the eye
CN106974614B (en) 2010-10-15 2019-04-26 雷萨公司 The system and method for the scan control illumination of the structure of inside of eye
USD694890S1 (en) 2010-10-15 2013-12-03 Lensar, Inc. Laser system for treatment of the eye
US10285852B2 (en) 2010-12-02 2019-05-14 Tel Hashomer Medical Research Infrastructure And Services Ltd., The Chaim Sheba Medical Center Subretinal delivery of therapeutic compositions
US10463541B2 (en) 2011-03-25 2019-11-05 Lensar, Inc. System and method for correcting astigmatism using multiple paired arcuate laser generated corneal incisions
US9393154B2 (en) 2011-10-28 2016-07-19 Raymond I Myers Laser methods for creating an antioxidant sink in the crystalline lens for the maintenance of eye health and physiology and slowing presbyopia development
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JP6402116B2 (en) 2013-02-26 2018-10-10 ベルキン レーザー リミテッド Glaucoma treatment system
CN105592828B (en) * 2013-08-02 2019-01-22 堤乐哈修门医学研究基础建设及服务有限公司 For delivering the composition to the device of eyes
IL308110A (en) 2018-07-02 2023-12-01 Belkin Vision Ltd Direct selective laser trabeculoplasty

Citations (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592085A (en) * 1982-02-25 1986-05-27 Sony Corporation Speech-recognition method and apparatus for recognizing phonemes in a voice signal
US4755999A (en) * 1985-03-25 1988-07-05 Macken John A Laser apparatus utilizing a magnetically enhanced electrical discharge
US4773414A (en) * 1983-11-17 1988-09-27 Lri L.P. Method of laser-sculpture of the optically used portion of the cornea
US4846172A (en) * 1987-05-26 1989-07-11 Berlin Michael S Laser-delivery eye-treatment method
US4907586A (en) * 1988-03-31 1990-03-13 Intelligent Surgical Lasers Method for reshaping the eye
US5019074A (en) * 1987-03-09 1991-05-28 Summit Technology, Inc. Laser reprofiling system employing an erodable mask
US5102409A (en) * 1988-04-22 1992-04-07 Balgorod Barry M Method and apparatus for modification of corneal refractive properties
US5108388A (en) * 1983-12-15 1992-04-28 Visx, Incorporated Laser surgery method
US5144830A (en) * 1987-06-15 1992-09-08 Terni Acciai Speciali S.P.A. Method for production of nodes for tubular truss structures
US5152760A (en) * 1989-03-17 1992-10-06 The General Hospital Corporation Non-invasive sclerostomy
US5163934A (en) * 1987-08-05 1992-11-17 Visx, Incorporated Photorefractive keratectomy
US5279298A (en) * 1992-11-20 1994-01-18 The Johns Hopkins University Method and apparatus to identify and treat neovascular membranes in the eye
US5311224A (en) * 1991-10-04 1994-05-10 Nidek Co., Ltd. Optical ophthalmic treatment apparatus
US5354331A (en) * 1992-07-15 1994-10-11 Schachar Ronald A Treatment of presbyopia and other eye disorders
US5423801A (en) * 1986-03-19 1995-06-13 Summit Technology, Inc. Laser corneal surgery
US5484432A (en) * 1985-09-27 1996-01-16 Laser Biotech, Inc. Collagen treatment apparatus
US5485737A (en) * 1994-03-07 1996-01-23 Mascotech Tubular Products, Inc. Apparatus for hydroforming a vehicle manifold
US5490849A (en) * 1990-07-13 1996-02-13 Smith; Robert F. Uniform-radiation caustic surface for photoablation
US5520679A (en) * 1992-12-03 1996-05-28 Lasersight, Inc. Ophthalmic surgery method using non-contact scanning laser
US5533997A (en) * 1994-06-29 1996-07-09 Ruiz; Luis A. Apparatus and method for performing presbyopia corrective surgery
US5549598A (en) * 1995-05-22 1996-08-27 O'donnell, Jr.; Francis E. Glaucoma laser trabeculodissection
US5599341A (en) * 1994-06-15 1997-02-04 Keravision, Inc. Laser surgical procedure and device for treatment of the cornea
US5630810A (en) * 1994-05-06 1997-05-20 Machat; Jeffery J. Method of ophthalmological surgery
US5738676A (en) * 1995-01-03 1998-04-14 Hammer; Daniel X. Laser surgical probe for use in intraocular surgery
US5741247A (en) * 1995-08-31 1998-04-21 Biolase Technology, Inc. Atomized fluid particles for electromagnetically induced cutting
US5782822A (en) * 1995-10-27 1998-07-21 Ir Vision, Inc. Method and apparatus for removing corneal tissue with infrared laser radiation
US5803923A (en) * 1994-09-15 1998-09-08 Jugvir I. Singh-Derewa Presbyopia correction using a protected space pattern, methods and apparatus
US5845024A (en) * 1994-09-16 1998-12-01 Namiki Precision Jewel Co., Ltd. Optical fiber with lens and method of manufacturing the same
US5891131A (en) * 1993-02-01 1999-04-06 Arizona Board Of Regents Method and apparatus for automated simulation and design of corneal refractive procedures
US5894916A (en) * 1996-05-24 1999-04-20 Luk Lamellen Und Kupplungbau Gmbh Friction clutch
US5928129A (en) * 1994-06-29 1999-07-27 Ruiz; Luis Antonio Apparatus and method for performing presbyopia corrective surgery
US5997529A (en) * 1996-10-28 1999-12-07 Lasersight Technologies, Inc. Compound astigmatic myopia or hyperopia correction by laser ablation
US6010497A (en) * 1998-01-07 2000-01-04 Lasersight Technologies, Inc. Method and apparatus for controlling scanning of an ablating laser beam
US6019754A (en) * 1998-10-29 2000-02-01 Kawesch; Glenn Method and apparatus for improving lasik flap adherence
US6090102A (en) * 1997-05-12 2000-07-18 Irvision, Inc. Short pulse mid-infrared laser source for surgery
US6090100A (en) * 1992-10-01 2000-07-18 Chiron Technolas Gmbh Ophthalmologische Systeme Excimer laser system for correction of vision with reduced thermal effects
US6099522A (en) * 1989-02-06 2000-08-08 Visx Inc. Automated laser workstation for high precision surgical and industrial interventions
US6110165A (en) * 1995-02-28 2000-08-29 Nidek Co., Ltd. Apparatus for laser treatment
US6132424A (en) * 1998-03-13 2000-10-17 Lasersight Technologies Inc. Smooth and uniform laser ablation apparatus and method
US6146375A (en) * 1998-12-02 2000-11-14 The University Of Michigan Device and method for internal surface sclerostomy
US6156030A (en) * 1997-06-04 2000-12-05 Y-Beam Technologies, Inc. Method and apparatus for high precision variable rate material removal and modification
US6161546A (en) * 1995-07-17 2000-12-19 Quardrivium, L.L.C. System for altering tissue beneath an outer layer of tissue
US6171336B1 (en) * 1996-03-26 2001-01-09 Mark R. Sawusch Method, implant, and apparatus for refractive keratoplasty
US6190374B1 (en) * 1996-11-29 2001-02-20 Nidek Co., Ltd. Apparatus for operating upon a cornea
US6197056B1 (en) * 1992-07-15 2001-03-06 Ras Holding Corp. Segmented scleral band for treatment of presbyopia and other eye disorders
US6197018B1 (en) * 1996-08-12 2001-03-06 O'donnell, Jr. Francis E. Laser method for restoring accommodative potential
US6203538B1 (en) * 1995-11-03 2001-03-20 Gholam A. Peyman Intrastromal corneal modification
US6210401B1 (en) * 1991-08-02 2001-04-03 Shui T. Lai Method of, and apparatus for, surgery of the cornea
US6258082B1 (en) * 1999-05-03 2001-07-10 J. T. Lin Refractive surgery and presbyopia correction using infrared and ultraviolet lasers
US6280435B1 (en) * 1998-03-04 2001-08-28 Visx, Incorporated Method and systems for laser treatment of presbyopia using offset imaging
US6283879B1 (en) * 1998-03-11 2001-09-04 Eden Enterprises Modified lacrosse stick for playing rollercross type game
US20010029363A1 (en) * 1999-05-03 2001-10-11 Lin J. T. Methods and apparatus for presbyopia correction using ultraviolet and infrared lasers
US6364871B1 (en) * 1996-10-21 2002-04-02 Apollo Vision, Inc. Method and device for sculpturing laser beams
US20030220630A1 (en) * 2001-03-30 2003-11-27 Jui-Teng Lin Methods and systems for treating presbyopia via laser ablation
US6745775B2 (en) * 1998-11-10 2004-06-08 Surgilight, Inc. Methods and apparatus for presbyopia treatment using a scanning laser system
US6824540B1 (en) * 2000-11-06 2004-11-30 Surgilight, Inc. Apparatus and methods for the treatment of presbyopia using fiber-coupled-lasers
US6869428B2 (en) * 2002-09-20 2005-03-22 Kabushiki Kaisha Topcon Ophthalmologic photocoagulator and photocoagulation method thereof

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US29363A (en) * 1860-07-31 Improvement in compositions for preservation of timber
US220630A (en) * 1879-10-14 Improvement in dumping-wagons
FR2529400A1 (en) 1982-06-25 1983-12-30 Cilas Alcatel GAS LASER WITH EXCITATION BY TRANSVERSE ELECTRIC DISCHARGE TRIGGERED BY PHOTOIONIZATION
US5144630A (en) 1991-07-29 1992-09-01 Jtt International, Inc. Multiwavelength solid state laser using frequency conversion techniques
US5984916A (en) 1993-04-20 1999-11-16 Lai; Shui T. Ophthalmic surgical laser and method
US5465737A (en) 1992-07-15 1995-11-14 Schachar; Ronald A. Treatment of presbyopia and other eye disorders
US5345331A (en) * 1993-04-13 1994-09-06 At&T Bell Laboratories Technique for reducing polarization dependent gain in an amplified optical transmission system
WO1998041177A1 (en) 1997-03-14 1998-09-24 Irvision, Inc. Short pulse mid-infrared parametric generator for surgery
US6156303A (en) * 1997-06-11 2000-12-05 University Of Washington Adeno-associated virus (AAV) isolates and AAV vectors derived therefrom
US6263879B1 (en) 1998-11-10 2001-07-24 J. T. Lin Treatment of presbyopia and other eye disorders using a scanning laser system

Patent Citations (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592085A (en) * 1982-02-25 1986-05-27 Sony Corporation Speech-recognition method and apparatus for recognizing phonemes in a voice signal
US4773414A (en) * 1983-11-17 1988-09-27 Lri L.P. Method of laser-sculpture of the optically used portion of the cornea
US5108388A (en) * 1983-12-15 1992-04-28 Visx, Incorporated Laser surgery method
US5108388B1 (en) * 1983-12-15 2000-09-19 Visx Inc Laser surgery method
US4755999A (en) * 1985-03-25 1988-07-05 Macken John A Laser apparatus utilizing a magnetically enhanced electrical discharge
US5484432A (en) * 1985-09-27 1996-01-16 Laser Biotech, Inc. Collagen treatment apparatus
US5423801A (en) * 1986-03-19 1995-06-13 Summit Technology, Inc. Laser corneal surgery
US5019074A (en) * 1987-03-09 1991-05-28 Summit Technology, Inc. Laser reprofiling system employing an erodable mask
US4846172A (en) * 1987-05-26 1989-07-11 Berlin Michael S Laser-delivery eye-treatment method
US5144830A (en) * 1987-06-15 1992-09-08 Terni Acciai Speciali S.P.A. Method for production of nodes for tubular truss structures
US5163934A (en) * 1987-08-05 1992-11-17 Visx, Incorporated Photorefractive keratectomy
US4907586A (en) * 1988-03-31 1990-03-13 Intelligent Surgical Lasers Method for reshaping the eye
US5102409A (en) * 1988-04-22 1992-04-07 Balgorod Barry M Method and apparatus for modification of corneal refractive properties
US6099522A (en) * 1989-02-06 2000-08-08 Visx Inc. Automated laser workstation for high precision surgical and industrial interventions
US5152760A (en) * 1989-03-17 1992-10-06 The General Hospital Corporation Non-invasive sclerostomy
US5490849A (en) * 1990-07-13 1996-02-13 Smith; Robert F. Uniform-radiation caustic surface for photoablation
US6210401B1 (en) * 1991-08-02 2001-04-03 Shui T. Lai Method of, and apparatus for, surgery of the cornea
US5311224A (en) * 1991-10-04 1994-05-10 Nidek Co., Ltd. Optical ophthalmic treatment apparatus
US5489299A (en) * 1992-07-15 1996-02-06 Schachar; Ronald A. Treatment of presbyopia and other eye disorders
US5503165A (en) * 1992-07-15 1996-04-02 Schachar; Ronald A. Treatment of presbyopia and other eye disorders
US5529076A (en) * 1992-07-15 1996-06-25 Schachar; Ronald A. Treatment of presbyopia and other eye disorders
US5354331A (en) * 1992-07-15 1994-10-11 Schachar Ronald A Treatment of presbyopia and other eye disorders
US5722952A (en) * 1992-07-15 1998-03-03 Schachar; Ronald A. Treatment of presbyopia and other eye disorders
US6197056B1 (en) * 1992-07-15 2001-03-06 Ras Holding Corp. Segmented scleral band for treatment of presbyopia and other eye disorders
US6090100A (en) * 1992-10-01 2000-07-18 Chiron Technolas Gmbh Ophthalmologische Systeme Excimer laser system for correction of vision with reduced thermal effects
US5279298A (en) * 1992-11-20 1994-01-18 The Johns Hopkins University Method and apparatus to identify and treat neovascular membranes in the eye
US5520679A (en) * 1992-12-03 1996-05-28 Lasersight, Inc. Ophthalmic surgery method using non-contact scanning laser
US5891131A (en) * 1993-02-01 1999-04-06 Arizona Board Of Regents Method and apparatus for automated simulation and design of corneal refractive procedures
US5485737A (en) * 1994-03-07 1996-01-23 Mascotech Tubular Products, Inc. Apparatus for hydroforming a vehicle manifold
US5630810A (en) * 1994-05-06 1997-05-20 Machat; Jeffery J. Method of ophthalmological surgery
US5599341A (en) * 1994-06-15 1997-02-04 Keravision, Inc. Laser surgical procedure and device for treatment of the cornea
US5533997A (en) * 1994-06-29 1996-07-09 Ruiz; Luis A. Apparatus and method for performing presbyopia corrective surgery
US5928129A (en) * 1994-06-29 1999-07-27 Ruiz; Luis Antonio Apparatus and method for performing presbyopia corrective surgery
US5803923A (en) * 1994-09-15 1998-09-08 Jugvir I. Singh-Derewa Presbyopia correction using a protected space pattern, methods and apparatus
US5845024A (en) * 1994-09-16 1998-12-01 Namiki Precision Jewel Co., Ltd. Optical fiber with lens and method of manufacturing the same
US5738676A (en) * 1995-01-03 1998-04-14 Hammer; Daniel X. Laser surgical probe for use in intraocular surgery
US6110165A (en) * 1995-02-28 2000-08-29 Nidek Co., Ltd. Apparatus for laser treatment
US5549598A (en) * 1995-05-22 1996-08-27 O'donnell, Jr.; Francis E. Glaucoma laser trabeculodissection
US6161546A (en) * 1995-07-17 2000-12-19 Quardrivium, L.L.C. System for altering tissue beneath an outer layer of tissue
US5741247A (en) * 1995-08-31 1998-04-21 Biolase Technology, Inc. Atomized fluid particles for electromagnetically induced cutting
US5782822A (en) * 1995-10-27 1998-07-21 Ir Vision, Inc. Method and apparatus for removing corneal tissue with infrared laser radiation
US6203538B1 (en) * 1995-11-03 2001-03-20 Gholam A. Peyman Intrastromal corneal modification
US6171336B1 (en) * 1996-03-26 2001-01-09 Mark R. Sawusch Method, implant, and apparatus for refractive keratoplasty
US5894916A (en) * 1996-05-24 1999-04-20 Luk Lamellen Und Kupplungbau Gmbh Friction clutch
US6197018B1 (en) * 1996-08-12 2001-03-06 O'donnell, Jr. Francis E. Laser method for restoring accommodative potential
US6364871B1 (en) * 1996-10-21 2002-04-02 Apollo Vision, Inc. Method and device for sculpturing laser beams
US5997529A (en) * 1996-10-28 1999-12-07 Lasersight Technologies, Inc. Compound astigmatic myopia or hyperopia correction by laser ablation
US6190374B1 (en) * 1996-11-29 2001-02-20 Nidek Co., Ltd. Apparatus for operating upon a cornea
US6090102A (en) * 1997-05-12 2000-07-18 Irvision, Inc. Short pulse mid-infrared laser source for surgery
US6156030A (en) * 1997-06-04 2000-12-05 Y-Beam Technologies, Inc. Method and apparatus for high precision variable rate material removal and modification
US6010497A (en) * 1998-01-07 2000-01-04 Lasersight Technologies, Inc. Method and apparatus for controlling scanning of an ablating laser beam
US6280435B1 (en) * 1998-03-04 2001-08-28 Visx, Incorporated Method and systems for laser treatment of presbyopia using offset imaging
US6283879B1 (en) * 1998-03-11 2001-09-04 Eden Enterprises Modified lacrosse stick for playing rollercross type game
US6132424A (en) * 1998-03-13 2000-10-17 Lasersight Technologies Inc. Smooth and uniform laser ablation apparatus and method
US6019754A (en) * 1998-10-29 2000-02-01 Kawesch; Glenn Method and apparatus for improving lasik flap adherence
US6745775B2 (en) * 1998-11-10 2004-06-08 Surgilight, Inc. Methods and apparatus for presbyopia treatment using a scanning laser system
US6146375A (en) * 1998-12-02 2000-11-14 The University Of Michigan Device and method for internal surface sclerostomy
US6258082B1 (en) * 1999-05-03 2001-07-10 J. T. Lin Refractive surgery and presbyopia correction using infrared and ultraviolet lasers
US20010029363A1 (en) * 1999-05-03 2001-10-11 Lin J. T. Methods and apparatus for presbyopia correction using ultraviolet and infrared lasers
US7275545B2 (en) * 1999-05-03 2007-10-02 Surgilight, Inc. Methods and apparatus for presbyopia correction using ultraviolet and infrared lasers
US6824540B1 (en) * 2000-11-06 2004-11-30 Surgilight, Inc. Apparatus and methods for the treatment of presbyopia using fiber-coupled-lasers
US20030220630A1 (en) * 2001-03-30 2003-11-27 Jui-Teng Lin Methods and systems for treating presbyopia via laser ablation
US6869428B2 (en) * 2002-09-20 2005-03-22 Kabushiki Kaisha Topcon Ophthalmologic photocoagulator and photocoagulation method thereof

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080125677A1 (en) * 2005-04-22 2008-05-29 Biolase Technology, Inc. Methods for treating hyperopia and presbyopia via laser tunneling
US8256431B2 (en) * 2006-04-24 2012-09-04 Biolase, Inc. Methods for treating hyperopia and presbyopia via laser tunneling
US20080125676A1 (en) * 2006-04-24 2008-05-29 Biolase Technology, Inc. Methods for treating hyperopia and presbyopia via laser tunneling
US9452044B2 (en) 2006-07-11 2016-09-27 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US9498324B2 (en) 2006-07-11 2016-11-22 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US8337550B2 (en) 2006-07-11 2012-12-25 Refocus Ocular, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US8409277B2 (en) 2006-07-11 2013-04-02 Refocus Ocular, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US8911496B2 (en) 2006-07-11 2014-12-16 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US20080091266A1 (en) * 2006-07-11 2008-04-17 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US9486310B2 (en) 2006-07-11 2016-11-08 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US11273028B2 (en) 2006-07-11 2022-03-15 Refocus Group Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US9504559B2 (en) 2006-07-11 2016-11-29 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US9687339B2 (en) 2006-07-11 2017-06-27 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US9700406B2 (en) 2006-07-11 2017-07-11 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US9717588B2 (en) 2006-07-11 2017-08-01 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US9730785B2 (en) 2006-07-11 2017-08-15 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US10285804B2 (en) 2006-07-11 2019-05-14 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US10485653B2 (en) 2006-07-11 2019-11-26 Refocus Group, Inc. Scleral prosthesis for treating presbyopia and other eye disorders and related devices and methods
US20100152848A1 (en) * 2008-11-19 2010-06-17 Refocus Group, Inc. Artificial intraocular lens, altered natural crystalline lens, or refilled natural crystalline lens capsule with one or more scleral prostheses for improved performance

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US20010029363A1 (en) 2001-10-11
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