WO2001037031A1 - Method for surface treatment of a contact lens for individual adjustment to the eye system - Google Patents

Method for surface treatment of a contact lens for individual adjustment to the eye system Download PDF

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Publication number
WO2001037031A1
WO2001037031A1 PCT/EP2000/011023 EP0011023W WO0137031A1 WO 2001037031 A1 WO2001037031 A1 WO 2001037031A1 EP 0011023 W EP0011023 W EP 0011023W WO 0137031 A1 WO0137031 A1 WO 0137031A1
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WIPO (PCT)
Prior art keywords
contact lens
eye
contact
carried out
refractive
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PCT/EP2000/011023
Other languages
German (de)
French (fr)
Inventor
Johannes Junger
Original Assignee
Tui Laser Ag
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Publication date
Application filed by Tui Laser Ag filed Critical Tui Laser Ag
Priority to AU23549/01A priority Critical patent/AU2354901A/en
Publication of WO2001037031A1 publication Critical patent/WO2001037031A1/en

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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
    • A61F9/00802—Methods or devices for eye surgery using laser for photoablation
    • A61F9/00812—Inlays; Onlays; Intraocular lenses [IOL]
    • 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
    • A61F9/00825—Methods or devices for eye surgery using laser for photodisruption
    • A61F9/00834—Inlays; Onlays; Intraocular lenses [IOL]
    • 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
    • A61F9/00802—Methods or devices for eye surgery using laser for photoablation
    • A61F9/00804—Refractive treatments
    • 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
    • A61F9/00819—Beam shaping with masks with photoablatable masks

Definitions

  • the invention relates to a method for surface treatment of a contact lens, taking into account topology and refraction values measured on the eye to be optically corrected.
  • Vision corrections on optically defective eyes can be carried out in a manner known per se by means of common contact lenses which can be placed directly on the surface of the eye as transparent optical elements.
  • the optical effect of contact lenses is almost identical to that of eyeglass lenses and due to the relative curvature of the opposing contact lens surfaces.
  • Commercially available contact lenses are manufactured in a molding process, however, only contact lenses of sufficient quality can be obtained in this way, which serve to correct spherical vision defects.
  • complicated contact lens surface processing techniques are necessary which provide the contact lens surface with a corresponding optically effective surface topology. Individual irregularities in the eye system have so far not been sufficiently taken into account in manufacturing processes.
  • US Pat. No. 5,196,027 shows a method with which the surface of a contact lens facing away from the eye can be processed with the aid of a laser beam.
  • a frame which is mounted in the immediate vicinity of the contact lens on the surface of the eye ensures that the eye cannot move relative to the processing laser beam.
  • EP 663 179 A1 describes a method with which refractive measurements can also be carried out on the eye provided with a contact lens, measurements being carried out at various points in the lens-eye system.
  • the invention is based on the object of specifying a production method for contact lenses which largely rules out the mismatches described above.
  • a way is to be found which individually adjusts the production of contact lenses to the eye body to be corrected, the method being intended to be carried out as simply and inexpensively as possible.
  • the solution concept formulated in claim 1 provides that a preferably soft contact lens is applied to the eye to be optically corrected, so that the contact lens and the eye body largely form a single optical unit. This means that the contact lens with its surface facing the eye rests as far as possible over the entire surface of the eye body, so that the contact lens is adapted precisely to the surface topology of the eye body.
  • the contact lens sitting directly on the eye is processed with the aid of a photo-ablative, thermal or photodisruptive material removal process in such a way that laser beams are aimed specifically at the Contact lens surface facing away from the eye, which cause a defined local material removal.
  • the energy input and the wavelength of the laser pulses used for this are to be selected such that the major part of the energy input is deposited in the contact lens material. Wavelengths in the ultraviolet spectral range which are absorbed by the contact lens materials used are preferably suitable for this purpose.
  • the amounts of material that can be removed by each individual laser pulse can be defined in the contact lens.
  • the photoablative, thermal or photodisruptive material removal process takes place over the entire surface of the contact lens until a desired surface topology is reached which corresponds to a surface power that corresponds to the optical correction values determined by the previous refractive measurement process.
  • the aid of the method according to the invention it is also possible to detect the changing refractive power ratios during the material removal with the aid of refractive measurement methods or the aforementioned wavefront detection measurement method, so that a direct influence on the material removal method can be exerted.
  • the refractive measurements can be carried out globally over the entire eye or at a large number of local points on the eye.
  • the contact lens is made of a material or at least has a material that absorbs UV light with a wavelength of 308 nm. This radiation shines through the tear film almost without loss and ablates the contact lens underneath.
  • the main advantage of the method according to the invention is that it allows the contact lens to undergo an individual refractive power adjustment for an optimal optical correction of the eye system.
  • the method according to the invention provides that a refractive measurement is carried out on the eye, optical correction data typical for the eye and information about the top surface of the eye are obtained and the refractive measurement is carried out with the contact lens fitted, and that a laser beam-assisted measurement is carried out Material removal method is applied to the contact lens separated from the eye, by means of which the surface to be processed takes on a surface shape by means of laser-assisted material removal, by means of which a surface power is obtained in the contact lens, which is determined by the optical correction data, taking into account the information about the eye surface topology.
  • the deformation of a wavefront on the eye system is measured, which results in the optical imaging properties of the eye system.
  • a flat distribution of local refractive powers or aberration values on the entire cornea based on the system eye can thus be recorded.
  • the contact lens is removed from the eye body, in addition to the optical correction values, information about the top surface of the eye during contact lens surface processing can also be taken into account, which can be obtained with the aid of suitable topology measurement methods.
  • the removal of material from the contact lens surface is controlled by a process computer, the laser energy being varied depending on the location in order to take into account corresponding deformation phenomena in the contact surface geometry.

Abstract

A method for surface treatment of a contact lens is disclosed, which is directly placed on the eye to be optically corrected by the contact lens. Said contact lens is essentially in contact with the eye over the whole of its one surface and comprises one other surface oriented away from the eye, which is to be worked. The invention is characterised in that a refractive measurement is carried out on the eye, to obtain typical optical correction data for the eye, with the contact lens in position. Furthermore, a laser supported material ablation of the contact lens, which is directly in contact with the eye, is applied, whereby the material ablation of the surface to be worked results in a surface form which lends a surface refractive property to the contact lens, as determined from the optical corrective data.

Description

Verfahren zur Oberflächenbearbeitung einer Kontaktlinse zur individuellen Process for surface treatment of a contact lens for individual
Anpassung an das System AugeAdaptation to the eye system
Technisches GebietTechnical field
Die Erfindung bezieht sich auf ein Verfahren zur Oberflächenbearbeitung einer Kontaktlinse, unter Berücksichtigung von am optisch zu korrigierenden Auge vermessenen Topologie- und Refraktionswerten.The invention relates to a method for surface treatment of a contact lens, taking into account topology and refraction values measured on the eye to be optically corrected.
Stand der TechnikState of the art
Sehkorrekturen an optisch fehlsichtigen Augen können in an sich bekannter Weise mittels gängiger Kontaktlinsen durchgeführt werden, die als transparente optische Elemente unmittelbar auf der Augenoberfläche aufsetzbar sind. Die optische Wirkung von Kontaktlinsen ist nahezu identisch wie bei Brillengläsern und durch die Relativkrümmung der sich gegenüberliegenden Kontaktlinsenoberflächen bedingt. Handelsübliche Kontaktlinsen werden in Formgussverfahren hergestellt, jedoch sind auf diese Weise lediglich Kontaktlinsen in einer ausreichenden Qualität zu erhalten, die der Korrektur sphärischer Sehfehler dienen. Sollen mit Kontaktlinsen jedoch Augen mit Astigmatismen korrigiert werden, so sind komplizierte Kontaktlinsenoberflächen-Bearbeitungstechniken nötig, die die Kontaktlinsenoberfläche mit einer entsprechenden optisch wirksamen Oberflächentopologie versehen. Individuelle Unregelmäßigkeiten im System Auge können bislang nicht ausreichend in Herstellungsverfahren berücksichtigt werden.Vision corrections on optically defective eyes can be carried out in a manner known per se by means of common contact lenses which can be placed directly on the surface of the eye as transparent optical elements. The optical effect of contact lenses is almost identical to that of eyeglass lenses and due to the relative curvature of the opposing contact lens surfaces. Commercially available contact lenses are manufactured in a molding process, however, only contact lenses of sufficient quality can be obtained in this way, which serve to correct spherical vision defects. However, if eyes with astigmatisms are to be corrected with contact lenses, complicated contact lens surface processing techniques are necessary which provide the contact lens surface with a corresponding optically effective surface topology. Individual irregularities in the eye system have so far not been sufficiently taken into account in manufacturing processes.
Bisher bekannte Oberflächenbearbeitungsverfahren sehen vor, die Kontaktlinsen getrennt vom Auge zu bearbeiten. Dies hat jedoch den Nachteil, dass die zum Teil sehr flexibel ausgebildeten Kontaktlinsen während ihrer Oberflächenbearbeitung eine andere Grundform einnehmen als es der Fall ist, wenn die Kontaktlinsen unmittelbar auf dem optisch zu korrigierenden Auge aufliegen. Da die Augenoberfläche zum Teil sehr starke Deformationen aufweist, wodurch die Augenoberfläche von einer idealen sphärischen Oberfläche stark abweichen kann, kann eine individuell bearbeitete Kontaktlinse auf der Augenoberfläche in entscheidendem Maße anders gekrümmt sein, als im Falle ihrer Herstellung. Dies führt unwillkürlich zu optischen Fehlanpassungen, die es gilt, zu vermeiden.Previously known surface processing methods provide for the contact lenses to be processed separately from the eye. However, this has the disadvantage that the contact lenses, some of which are very flexible, take on a different basic shape during their surface processing than is the case if the contact lenses are immediate rest on the eye to be optically corrected. Since the surface of the eye sometimes has very strong deformations, which can cause the surface of the eye to deviate significantly from an ideal spherical surface, an individually machined contact lens on the surface of the eye can be significantly differently curved than when it was manufactured. This involuntarily leads to optical mismatches that must be avoided.
Aus der US 5,196,027 ist demgegenüber ein Verfahren zu entnehmen, mit dem die dem Auge abgewandte Oberfläche einer, auf dem Auge aufsitzenden Kontaktlinse mit Hilfe eines Laserstrahls bearbeitet werden kann. Während der Laserbearbeitung der Kontaktlinse wird über ein Gestell, das in unmittelbarer Nähe zur Kontaktlinse auf der Augenoberfläche angebracht ist, dafür gesorgt, dass sich das Auge relativ zum Bearbeitungslaserstrahl nicht bewegen kann.In contrast, US Pat. No. 5,196,027 shows a method with which the surface of a contact lens facing away from the eye can be processed with the aid of a laser beam. During the laser processing of the contact lens, a frame which is mounted in the immediate vicinity of the contact lens on the surface of the eye ensures that the eye cannot move relative to the processing laser beam.
Aus der DE 40 02 029 ist ein Verfahren zur Herstellung von Kontaktlinsen und Kontaktlinsenfertigungssystem zu entnehmen, bei dem die Topographie der Augenoberfläche am bloßen Auge gemessen wird und mit Hilfe dieser Messwerte die Form einer Kontaktlinse berechnet und entsprechend hergestellt wird.From DE 40 02 029 a method for producing contact lenses and a contact lens production system can be found, in which the topography of the surface of the eye is measured on the naked eye and with the aid of these measured values the shape of a contact lens is calculated and produced accordingly.
Ein weiteres Verfahren zur Formkorrektur einer Kontaktlinse ist aus der DE 42 32 690 C1 zu entnehmen, bei dem ein Laserstrahl pulsförmig nacheinander unterschiedliche Bereiche der Oberfläche der zu bearbeitenden Linse trifft und hier mittels Photoablation Material abträgt. Das Maß der Abtragungstiefe wird jedoch nicht aktiv überwacht sondern stützt sich lediglich auf empirische Werte.Another method for correcting the shape of a contact lens can be found in DE 42 32 690 C1, in which a laser beam hits different areas of the surface of the lens to be processed successively in a pulsed manner and removes material here by means of photoablation. The extent of the depth of ablation is not actively monitored, however, but is based only on empirical values.
Schließlich wird in der EP 663 179 A1 ein Verfahren beschrieben, mit dem refraktive Messungen auch am, mit einer Kontaktlinse versehenen Auge vorgenommen werden können, wobei an verschiedenen Stellen des Systems Linse-Auge Messungen vorgenommen werden.Finally, EP 663 179 A1 describes a method with which refractive measurements can also be carried out on the eye provided with a contact lens, measurements being carried out at various points in the lens-eye system.
Alle vorstehend bekannten Verfahren, insbesondere unter Hinweis der drei erstgenannten Quellenangaben dienen der Formgebung von Kontaktlinsen, sie weisen jedoch allesamt den Nachteil auf, dass sie einerseits mit kompliziert zu treffenden Maßnahmen verbunden sind, wie beispielsweise das Verfahren gemäß der US 5,196,027, oder aber nur ungenaue Korrekturmaßnahmen hinsichtlich der Augentopologie vornehmen können.All of the methods known above, in particular with reference to the first three sources mentioned, serve to shape contact lenses However, all of them have the disadvantage that on the one hand they are associated with measures that are complicated to take, such as the method according to US Pat. No. 5,196,027, or they can only carry out imprecise corrective measures with regard to the eye topology.
Darstellung der ErfindungPresentation of the invention
Der Erfindung liegt die Aufgabe zu Grunde, ein Herstellverfahren für Kontaktlinsen anzugeben, das die vorstehend beschriebenen Fehlanpassungen weitgehend ausschließt. Insbesondere soll ein Weg gefunden werden, der die Herstellung von Kontaktlinsen individuell auf den zu korrigierenden Augenkörper abstimmt, wobei das Verfahren möglichst einfach und kostengünstig durchführbar sein soll.The invention is based on the object of specifying a production method for contact lenses which largely rules out the mismatches described above. In particular, a way is to be found which individually adjusts the production of contact lenses to the eye body to be corrected, the method being intended to be carried out as simply and inexpensively as possible.
Die Lösung der der Erfindung zu Grunde liegenden Aufgabe ist Gegenstand des Anspruchs 1 und 4. Den Erfindungsgedanken vorteilhaft weiterbildende Merkmale sind Gegenstand der Unteransprüche.The solution to the problem on which the invention is based is the subject of claims 1 and 4. Features which advantageously further develop the inventive idea are the subject of the subclaims.
Der im Anspruch 1 formulierte Lösungsgedanke sieht vor, dass eine vorzugsweise weiche Kontaktlinse auf das optisch zu korrigierende Auge aufgebracht wird, sodass die Kontaktlinse und der Augenkörper weitgehend eine einzige optische Einheit bilden. Damit ist gemeint, dass die Kontaktlinse mit ihrer, dem Auge zugewandten Oberfläche möglichst ganzflächig auf dem Augenkörper aufliegt, sodass die Kontaktlinse passgenau an die Oberflächentopologie des Augenkörpers angepasst ist.The solution concept formulated in claim 1 provides that a preferably soft contact lens is applied to the eye to be optically corrected, so that the contact lens and the eye body largely form a single optical unit. This means that the contact lens with its surface facing the eye rests as far as possible over the entire surface of the eye body, so that the contact lens is adapted precisely to the surface topology of the eye body.
Mit Hilfe eines refraktiven Messverfahrens, z.B. dem sogenannten Wavefront Detection Verfahren wird nun die optische Fehlsichtigkeit des Auges bestimmt, sodass optische Korrekturwerte ermittelt werden, die der nachfolgenden Oberflächenbehandlung für die Kontaktlinse zugrundegelegt werden.With the help of a refractive measuring method, e.g. The so-called wavefront detection method is now used to determine the optical ametropia of the eye, so that optical correction values are determined which are the basis for the subsequent surface treatment for the contact lens.
In einem weiteren Schritt wird die auf dem Auge unmittelbar aufsitzende Kontaktlinse mit Hilfe eines z.B. photoablativen, thermischen oder photodisruptiven Materialabtrageverfahrens derart bearbeitet, sodass Laserstrahlen gezielt auf die dem Auge abgewandten Kontaktlinsenoberfläche gerichtet werden, die einen definierten lokalen Materialabtrag bewirken. Der Energieeintrag und die Wellenlänge der hierfür verwendeten Laserpulse sind derart zu wählen, dass der größte Teil des Energieeintrags im Kontaktlinsenmaterial deponiert wird. Vorzugsweise eignen sich hierzu Wellenlängen im ultravioletten Spektralbereich, die von den verwendeten Kontaktlinsenmaterialien absorbiert werden. Durch die gezielte Wahl der Wellen- und/oder Pulslänge und des Energieeintrages sowie geeignete Fokussierung können die durch jeden einzelnen Laserpuls abtragbaren Materialmengen in der Kontaktlinse definiert werden. Das photoablative, thermische oder photodisruptive Materialabtrageverfahren erfolgt über die gesamte Oberfläche der Kontaktlinse solange, bis eine gewünschte Oberflächentopologie erreicht ist, die einer Flächenbrechkraft entspricht, die den durch das vorangegangene refraktive Messverfahren ermittelten optischen Korrekturwerten entsprechen.In a further step, the contact lens sitting directly on the eye is processed with the aid of a photo-ablative, thermal or photodisruptive material removal process in such a way that laser beams are aimed specifically at the Contact lens surface facing away from the eye, which cause a defined local material removal. The energy input and the wavelength of the laser pulses used for this are to be selected such that the major part of the energy input is deposited in the contact lens material. Wavelengths in the ultraviolet spectral range which are absorbed by the contact lens materials used are preferably suitable for this purpose. Through the targeted selection of the wavelength and / or pulse length and the energy input as well as suitable focusing, the amounts of material that can be removed by each individual laser pulse can be defined in the contact lens. The photoablative, thermal or photodisruptive material removal process takes place over the entire surface of the contact lens until a desired surface topology is reached which corresponds to a surface power that corresponds to the optical correction values determined by the previous refractive measurement process.
Mit Hilfe des erfindungsgemäßen Verfahrens ist es zudem möglich, während des Materialabtragens die sich ändernden Brechkraftverhältnisse mit Hilfe refraktiver Messverfahren oder des vorstehend genannten Wavefront Detection- Messverfahrens zu erfassen, sodass eine unmittelbare Einflußnahme auf das Materialabtrageverfahren genommen werden kann. Die refraktiven Messungen können dabei global über das gesamte Auge oder an einer Vielzahl von lokalen Stellen am Auge durchgeführt werden.With the aid of the method according to the invention, it is also possible to detect the changing refractive power ratios during the material removal with the aid of refractive measurement methods or the aforementioned wavefront detection measurement method, so that a direct influence on the material removal method can be exerted. The refractive measurements can be carried out globally over the entire eye or at a large number of local points on the eye.
Um zu gewährleisten, dass die Kontaktlinse während der Behandlung auf der Augenoberfläche möglichst positionsstabil verbleibt, finden vorzugsweise an sich bekannte, selbststabilisierende Kontaktlinsen Verwendung, die an einer oder mehreren Stelle durch asymmetrische Gewichtsverteilung nach unten gezogen werden oder durch Kerben o.a. in der Hornhaut sowie durch entsprechende Formgebung in der Kontaktlinse selbstzentrierend auf dem Auge aufsitzen. In diesem Fall ist die Kontaktlinse aus einem Material gefertigt oder weist zumindest ein Material auf, das UV-Licht einer Wellenlänge von 308 nm absorbiert. Diese Strahlung durchstrahlt durch den Tränenfilm nahezu verlustfrei und ablatiert die darunter befindliche Kontaktlinse. Hauptvorteil des erfindungsgemäßen Verfahrens ist, dass es gestattet, dass die Kontaktlinse eine individuelle Brechkraftanpassung für eine optimale optische Korrektur des Systems Auge erfährt.In order to ensure that the contact lens remains as stable as possible on the surface of the eye during the treatment, self-stabilizing contact lenses known per se are preferably used, which are pulled down at one or more points by asymmetrical weight distribution or by notches or the like in the cornea and by corresponding ones Fit the shape of the contact lens on the eye in a self-centering manner. In this case, the contact lens is made of a material or at least has a material that absorbs UV light with a wavelength of 308 nm. This radiation shines through the tear film almost without loss and ablates the contact lens underneath. The main advantage of the method according to the invention is that it allows the contact lens to undergo an individual refractive power adjustment for an optimal optical correction of the eye system.
In einer alternativen Ausführungsweise sieht das erfindungsgemäße Verfahren vor, dass eine refraktive Messung am Auge durchgeführt wird, wobei für das Auge typische optische Korrekturdaten sowie Informationen über die Augenoberflächentopologie gewonnen werden und die refraktive Messung mit aufsitzender Kontaktlinse durchgeführt wird, und dass ein, mittels Laserstrahl unterstütztes Materialabtrageverfahren an der vom Auge getrennten Kontaktlinse angewendet wird, durch das die zu bearbeitende Oberfläche mittels Laserunterstützes Materialabtragung eine Oberflächenform annimmt, durch die eine Flächenbrechkraft in der Kontaktlinse gewonnen wird, die durch die optischen Korrekturdaten bestimmt wird, wobei die Informationen über die Augenoberflächentopologie berücksichtigt werden.In an alternative embodiment, the method according to the invention provides that a refractive measurement is carried out on the eye, optical correction data typical for the eye and information about the top surface of the eye are obtained and the refractive measurement is carried out with the contact lens fitted, and that a laser beam-assisted measurement is carried out Material removal method is applied to the contact lens separated from the eye, by means of which the surface to be processed takes on a surface shape by means of laser-assisted material removal, by means of which a surface power is obtained in the contact lens, which is determined by the optical correction data, taking into account the information about the eye surface topology.
Unter Verwendung des Wavefront Detection Verfahrens wird die Deformation einer Wellenfront auf das System Auge gemessen, wodurch sich die optischen Abbildungseigenschaften des Systems Auge ergeben. Somit kann eine flächige Verteilung lokaler Brechkräfte bzw. Aberrationswerte auf der gesamten Cornea bezogen auf das System Auge erfasst werden.Using the wavefront detection method, the deformation of a wavefront on the eye system is measured, which results in the optical imaging properties of the eye system. A flat distribution of local refractive powers or aberration values on the entire cornea based on the system eye can thus be recorded.
Nimmt man nach vollzogener optischer refraktiver Vermessung des Auges die Kontaktlinse vom Augenkörper ab, so können neben den optischen Korrekturwerten auch die Informationen über die Augenoberflächentopologie während der Kontaktlinsenoberflächenbearbeitung mitberücksichtigt werden, die mit Hilfe geeigneter Topololgiemessverfahren gewonnen werden können. Der Materialabtrag von der Kontaktlinsenoberfläche erfolgt Prozessrechnergesteuert, wobei die Laserenergie ortsabhängig variiert wird um entsprechende Deformationserscheinungen in der Kontaktflächengeometrie zu berücksichtigen. If, after the optical refractive measurement of the eye has been carried out, the contact lens is removed from the eye body, in addition to the optical correction values, information about the top surface of the eye during contact lens surface processing can also be taken into account, which can be obtained with the aid of suitable topology measurement methods. The removal of material from the contact lens surface is controlled by a process computer, the laser energy being varied depending on the location in order to take into account corresponding deformation phenomena in the contact surface geometry.

Claims

Patentansprüche claims
1. Verfahren zur Oberflächenbearbeitung einer Kontaktlinse, die unmittelbar auf ein durch die Kontaktlinse optisch zu korrigierendes Auge aufgesetzt wird, mit einer mit dem Auge weitgehend ganzflächig in Kontakt tretenden Kontaktlinsenoberfläche und einer dem Auge gegenüberliegenden zu bearbeitenden Kontaktlinsenoberfläche, dadurch gekennzeichnet, dass eine refraktive Messung am Auge durchgeführt wird, wobei für das Auge typische optische Korrekturdaten gewonnen werden und die refraktive Messung mit aufsitzender Kontaktlinse durchgeführt wird, und dass ein, mittels Laserstrahl unterstütztes Materialabtrageverfahren an der unmittelbar auf dem Auge aufsitzenden Kontaktlinse angewendet wird, durch das die zu bearbeitende Oberfläche mittels Laser-unterstützes Materialabtragung eine Oberflächenform annimmt, durch die eine Flächenbrechkraft in der Kontaktlinse gewonnen wird, die durch die optischen Korrekturdaten bestimmt wird.1.Procedure for the surface treatment of a contact lens which is placed directly on an eye to be optically corrected by the contact lens, with a contact surface of the contact surface that comes into contact with the eye over the entire surface and a contact lens surface opposite the eye to be processed, characterized in that a refractive measurement on Eye is carried out, with optical correction data typical of the eye being obtained and the refractive measurement being carried out with the contact lens fitted, and that a material removal process supported by a laser beam is applied to the contact lens directly sitting on the eye, through which the surface to be processed is lasered assisted material removal assumes a surface shape, through which a surface power is obtained in the contact lens, which is determined by the optical correction data.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass das Materialabtrageverfahren mittels refraktiver Messung und/ oder Augentopologieerfassung überwacht wird.2. The method according to claim 1, characterized in that the material removal process is monitored by means of refractive measurement and / or eye topology detection.
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die refraktive Messung unter Verwendung einer Wavefront Detection Messung durchgeführt wird.3. The method according to claim 1, characterized in that the refractive measurement is carried out using a wavefront detection measurement.
4. Verfahren zur Oberflächenbearbeitung einer Kontaktlinse, unter Berücksichtigung von am optisch zu korrigierenden Auge vermessenen Topologie- und Refraktionswerten, dadurch gekennzeichnet, dass eine refraktive Messung am Auge durchgeführt wird, wobei für das Auge typische optische Korrekturdaten sowie Informationen über die Augenoberflächentopologie gewonnen werden und die refraktive und topologische Messung mit aufsitzender Kontaktlinse durchgeführt wird, und dass ein, mittels Laserstrahl unterstütztes Materialabtrageverfahren an der vom Auge getrennten Kontaktlinse angewendet wird, durch das die zu bearbeitende Oberfläche mittels Laser-unterstützes Materialabtragung eine Oberflächenform annimmt, durch die eine Flächenbrechkraft in der Kontaktlinse gewonnen wird, die durch die optischen Korrekturdaten bestimmt wird, wobei die Informationen über die Augenoberflächentopologie berücksichtigt werden.4.Procedure for surface treatment of a contact lens, taking into account topology and refraction values measured on the eye to be optically corrected, characterized in that a refractive measurement is carried out on the eye, optical correction data typical for the eye and information about the eye surface topology being obtained and the refractive and topological measurement is carried out with the contact lens seated, and that a material removal process supported by a laser beam is applied to the contact lens separated from the eye, through which the surface to be processed is removed by means of Laser-assisted material removal assumes a surface shape, through which a surface power is obtained in the contact lens, which is determined by the optical correction data, taking into account the information about the eye surface topology.
5. Verfahren nach einem der Ansrüche 1 bis 4, dadurch gekennzeichnet, dass zur photoablativen Materialabtragung Laserpulse verwendet werden, die zu einen bestimmten Energieeintrag in das Kontaklinsenmaterial führen wodurch eine definierte Menge an Kontaktlinsenmaterial photoablativ abgetragen wird.5. The method according to any one of claims 1 to 4, characterized in that laser pulses are used for the photoablative material removal, which lead to a certain energy input into the contact lens material, whereby a defined amount of contact lens material is removed photoablatively.
6. Verfahren nach einem der Ansrüche 1 bis 5, dadurch gekennzeichnet, dass das zur Photoablation erforderliche Laserlicht, vorzugsweise UV-Licht vollständig in der Kontaktlinse absorbiert wird.6. The method according to any one of claims 1 to 5, characterized in that the laser light required for photoablation, preferably UV light, is completely absorbed in the contact lens.
7. Verfahren nach einem der Ansrüche 1 bis 6, dadurch gekennzeichnet, dass die Kontaktlinse aus weichem Kontaktlinsenmaterial gewählt wird, sodass ein bündiges Anschmiegen der Kontaktlinse mit der Augenoberfläche erfolgt.7. The method according to any one of claims 1 to 6, characterized in that the contact lens is selected from soft contact lens material, so that the contact lens is flush with the surface of the eye.
8. Verfahren nach einem der Ansrüche 1 bis 7, dadurch gekennzeichnet, dass die Materialbearbeitung photodisruptiv beziehungsweise thermisch erfolgt statt photoablativ, z.B. bei Pico- und Femtosekundenlasem beziehungsweise Erbiumlasern. 8. The method according to any one of claims 1 to 7, characterized in that the material processing takes place photodisruptively or thermally instead of photoablatively, e.g. with pico and femtosecond lasers or erbium lasers.
PCT/EP2000/011023 1999-11-12 2000-11-08 Method for surface treatment of a contact lens for individual adjustment to the eye system WO2001037031A1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1322215A1 (en) * 2000-09-26 2003-07-02 Calhoun Vision Inc. Power adjustment of adjustable lens
WO2003101348A1 (en) * 2002-05-31 2003-12-11 Bausch & Lomb Incorporated Polymeric materials for use as photoablatable inlays
AU2001294818B2 (en) * 2000-09-26 2006-08-17 Calhoun Vision, Inc. Power adjustment of adjustable lens
EP2287656A1 (en) * 2009-08-17 2011-02-23 Hecht Contactlinsen GmbH Method for producing contact lenses adapted to a person's eyes
US11266495B2 (en) 2019-10-20 2022-03-08 Rxsight, Inc. Light adjustable intraocular lens with a modulable absorption front protection layer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10241211B4 (en) * 2002-09-05 2004-09-16 Technovision GmbH Gesellschaft für die Entwicklung medizinischer Technologie Device and method for manufacturing customized soft contact lenses
EP1546791A1 (en) 2002-10-04 2005-06-29 Carl Zeiss AG Method for production of a lens and lens produced thus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5196027A (en) * 1990-05-02 1993-03-23 Thompson Keith P Apparatus and process for application and adjustable reprofiling of synthetic lenticules for vision correction
US5423801A (en) * 1986-03-19 1995-06-13 Summit Technology, Inc. Laser corneal surgery
DE19727573C1 (en) * 1996-10-26 1998-05-20 Aesculap Meditec Gmbh Device and method for shaping surfaces, in particular lenses
US5777719A (en) * 1996-12-23 1998-07-07 University Of Rochester Method and apparatus for improving vision and the resolution of retinal images
US5941874A (en) * 1997-03-10 1999-08-24 Chiron Technolas Gmbh Opthalmologische Systeme Simulating a laser treatment on the eye by pretreating a contact lens
WO2001012113A1 (en) * 1999-08-11 2001-02-22 Asclepion-Meditec Ag Method and device for performing online aberrometrie in refractive eye correction indices

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002029A1 (en) * 1990-01-24 1991-07-25 Peter Hoefer METHOD FOR THE PRODUCTION OF CONTACT LENSES AND CONTACT LENS PRODUCTION SYSTEM
DE4232690C1 (en) * 1992-09-30 1994-04-07 Aesculap Ag Method and device for correcting the shape of a lens
EP0663179A1 (en) * 1994-01-12 1995-07-19 Ciba-Geigy Ag Spatial refractometer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5423801A (en) * 1986-03-19 1995-06-13 Summit Technology, Inc. Laser corneal surgery
US5196027A (en) * 1990-05-02 1993-03-23 Thompson Keith P Apparatus and process for application and adjustable reprofiling of synthetic lenticules for vision correction
DE19727573C1 (en) * 1996-10-26 1998-05-20 Aesculap Meditec Gmbh Device and method for shaping surfaces, in particular lenses
US5777719A (en) * 1996-12-23 1998-07-07 University Of Rochester Method and apparatus for improving vision and the resolution of retinal images
US5941874A (en) * 1997-03-10 1999-08-24 Chiron Technolas Gmbh Opthalmologische Systeme Simulating a laser treatment on the eye by pretreating a contact lens
WO2001012113A1 (en) * 1999-08-11 2001-02-22 Asclepion-Meditec Ag Method and device for performing online aberrometrie in refractive eye correction indices

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KLEIN STANLEY A: "Optimal corneal ablation for eyes with arbitrary Hartmann-Shack aberrations", JOURNAL OF THE OPTICAL SOCIETY OF AMERICA - A,OPTICAL SOCIETY OF AMERICA, WASHINGTON,US, vol. 15, no. 9, September 1998 (1998-09-01), pages 2580 - 2588, XP002162912, ISSN: 0740-3232 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1322215A1 (en) * 2000-09-26 2003-07-02 Calhoun Vision Inc. Power adjustment of adjustable lens
EP1322215A4 (en) * 2000-09-26 2005-05-25 Calhoun Vision Inc Power adjustment of adjustable lens
AU2001294818B2 (en) * 2000-09-26 2006-08-17 Calhoun Vision, Inc. Power adjustment of adjustable lens
US7105110B2 (en) 2000-09-26 2006-09-12 Calhoun Vision, Inc. Delivery system for post-operative power adjustment of adjustable lens
WO2003101348A1 (en) * 2002-05-31 2003-12-11 Bausch & Lomb Incorporated Polymeric materials for use as photoablatable inlays
EP2287656A1 (en) * 2009-08-17 2011-02-23 Hecht Contactlinsen GmbH Method for producing contact lenses adapted to a person's eyes
US11266495B2 (en) 2019-10-20 2022-03-08 Rxsight, Inc. Light adjustable intraocular lens with a modulable absorption front protection layer

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