WO1989000029A1 - Synthetic polymer for endocapsular lens replacement - Google Patents
Synthetic polymer for endocapsular lens replacement Download PDFInfo
- Publication number
- WO1989000029A1 WO1989000029A1 PCT/US1988/002196 US8802196W WO8900029A1 WO 1989000029 A1 WO1989000029 A1 WO 1989000029A1 US 8802196 W US8802196 W US 8802196W WO 8900029 A1 WO8900029 A1 WO 8900029A1
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- WIPO (PCT)
- Prior art keywords
- photoinitiator
- composition
- prepolymer
- lens
- oxygen
- Prior art date
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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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
-
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
- A61F2/16—Intraocular lenses
-
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
- A61F2/16—Intraocular lenses
- A61F2/1613—Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
- A61F2/1624—Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus having adjustable focus; power activated variable focus means, e.g. mechanically or electrically by the ciliary muscle or from the outside
-
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
- A61F2/16—Intraocular lenses
- A61F2/1662—Instruments for inserting intraocular lenses into the eye
Definitions
- the present invention relates to treatment of defects in the eye, and, more particularly, to the replacement of diseased or otherwise defective eye lenses.
- a problem with the polymeric composition disclosed is that a separate heating step is required to permit removal of the needle from the eye to initiate polymerization at the injection site and thus prevent loss of polymer therefrom. Further, the time of initial cross- linking is on the order of several hours, which involves lengthy immobilization of the eye to permit complete curing.
- a synthetic polymer for endocapsular lens replacement.
- the polymer which is injected into the lens capsule after removal of the lens, comprises an oxygen-stabilized photosensitive prepolymer.
- An example of such a prepolymer comprises a polyether with urethane linkages with one or both ends capped with a functional group containing at least one double bond, such as an acrylate, methacrylate, or a styrene.
- the polymerization reaction is initiated by light using a photoinitiator such as dimethoxyphenylacetophenone and other aryl ketones and is quenched in the presence of oxygen. Contrary to the prior art polymers, the time of curing is on the order of only a minute or so.
- the viscosity and thickness of the polymer formed may be tailored to achieve a desired index of refraction.
- FIGS. 1-5 are diagrammatic views of a portion of an eye, showing the procedure of lens removal, followed by injection of the polymer used in the method of the invention.
- the probe 12 which advantageously comprises means for emitting high frequency vibrations, has caused ultrasonic disintegration of the lens 18 by a process known as sonication.
- the probe 12 which also includes aspiration means 12', has begun removal of the denatured protein of the lens, or lens fragments, 18.
- the process is complete, leaving behind the empty lens capsule 16. The particular method of disintegrating the lens and removing it is Immaterial to the practice of the invention, and thus forms no part of this invention.
- a needle 20 is inserted into the same incision 22 used by the probe 12 and is used to inject a polymer composition 24 into the lens capsule 16.
- the polymer is deoxygenated prior to injection.
- the needle 20 is gradually withdrawn as the polymer fills the capsule 16 and the incision 22a through the cornea 14 is surgically closed. Since the polymer cures to its final state within a matter of minutes using light, no heating step is required to cure the polymer around the incision 22b in the lens capsule 16 to permit removal of the needle 20.
- the completely filled lens capsule 16 is depicted in FIG. 5.
- the polymer composition 24 is Injected into the lens capsule 16 through slit 22b, which is typically no larger than 3 mm, and is intended to cross-link rapidly so that the composition, which is injected in a liquid state, will not squirt out the slit when the needle 20 is withdrawn.
- the polymer composition used in the practice of the invention comprises (a) a prepolymer and (b) a photoinitiator.
- the prepolymer is preferably one that is substantially linear, with one, and preferably both, ends capped with a functional group having at least one olefinic bond. Examples of such functional groups include acrylates, methacrylates, and styrenes.
- both ends be capped, in order to form a more homogeneous polymer.
- the presence of the double bond permits olefinic-type cross-linking.
- Suitable prepolymers include polypropylene glycols, polypropylene glycols with polyethylene glycol units, polybutylene glycols with polyethylene glycol units, urethanes, and silicones such as dimethyl silicone and ethyl silicone.
- the molecular weight of the prepolymer advantageously ranges from about 2,000 to 8,000, although lower or higher molecular weight material may be employed.
- the photoinitiator comprises a composition which initiates polymerization of olefinic end groups in the visible-to-near-UV region.
- photoinitiators particularly suited for causing cross-linking of acrylate groups, Include acetophenone derivatives, such as dimethoxyphenylacetophenone.
- the procedure for formation and removal of lens fragments 18 involves the use of a microscope and a lamp for illumination of the eye. When injecting the polymer composition 24 into the lens capsule 16, the cross-linking procedure may be performed using the same lamp employed in conjunction with the microscope used by the surgeon to remove the lens fragments 18. This lamp is of the appropriate wavelength and is of sufficient intensity to activate the photoinitiator and begin the process of cross- linking.
- concentration of photoinitiator is normally about 0.25 to 2 wt%.
- the time for reaction is ordinarily less than about five minutes.
- the observable physical properties do not seem to change after the first several minutes of cross- linking.
- the photoinitiator is quenched by the presence of oxygen, and accordingly, the operation may be done by continuously flushing the eye with an inert gas, such as nitrogen or argon, or with saline until the reaction is substantially complete.
- the prepolymer is stabilized with oxygen during storing and sample preparation and degassed in the dark before injection, such as with a vacuum pump, and back-filled with the inert gas. Normal atmosphere is sufficient to stabilize the prepolymer during handling and storage. It is well-known that the eye lens is layered, like that of an onion, with each layer having a different refractive index.
- the polymerized composition is essentially homogeneous.
- the viscosity and refractive index of the composition is a function of the uncapped portion of the prepolymer, and may be configured to provide a refractive index between about 1.3 and 1.6.
- the polymerized composition 24 is an elastomer, the muscles of the eye 10 may still perform their normal function of accommodation. Further, the ability to tailor the polymerized composition in terms of elasticity, viscosity and refractive index means that the lens formation, when done in conjunction with the sonication lens removal, may be performed early in the process of cataract formation.
- Polyether glycols of average molecular weights between 1,000 and 4,000 were combined through urethane linkages using diisocyanates such as isophorone diisocyanate (Fluka Chemical Corp., Hauppauge, NY) or methylene bis (4- cyclohexyldiisocyanate) (Mobay Chemical Corp., Pittsburgh, PA).
- diisocyanates such as isophorone diisocyanate (Fluka Chemical Corp., Hauppauge, NY) or methylene bis (4- cyclohexyldiisocyanate) (Mobay Chemical Corp., Pittsburgh, PA).
- the ends were then capped with a compound containing a terminal alkene such as isocyanatoethyl methacrylate (Dow Chemical Co., Midland, MI) or 2-hydrox ⁇ ethyl methacrylate (Aldrich Chemical Co., Milwaukee, WI).
- reactions were catalyzed by a tin compound such as stannous dioctan- oate.
- the resultant prepolymer was a colorless liquid with viscosity sufficiently low so that it could be Injected by syringe through a 20 gauge needle.
- the material could be purified, if necessary, through various known chromato- graphic methods.
- BHT 25 to 100 ppm may be added to stabilize the polymer.
- the polymer was thoroughly mixed with the appropriate quantity of photoinitiator, such as 2,2-dimethoxy-2-phenyl acetophenone (Aldrich Chemical Co.), transferred to a syringe, then pumped in vacuo, protected from light, for at least 24 hrs.
- the polymer-filled syringe was stored, protected from light, under an inert atmosphere.
- DesW - Desmodur W [methylene bis(4-cyclohexylisocyanate)]
- the mechanism for the photoinitiation apparently involves homolytic cleavage of the initiator to give two radicals, which then initiate the cross-linking reaction. Because molecular oxygen reacts with radicals, deoxygenation of the monomer allows for rapid cross-linking.
- the resultant in situ cross-linked polymer was a transparent plastic with variable elasticity, depending on the degree of cross-linking and chemical composition.
Abstract
A synthetic polymer (24) is provided for endocapsular lens (18) replacement in an eye (10). The polymer, which is injected into the lens capsule (16) after removal of the lens, comprises an oxygen-stabilized photosensitive prepolymer. An example of such a prepolymer comprises polyether with urethane linkages with one or both ends capped with a functional group containing at least one double bond, such as an acrylate, a methacrylate, or a styrene. The polymerization reaction is initiated with a photoinitiator such as dimethoxyphenylacetophenone and is quenched in the presence of oxygen. Contrary to the prior art polymers, the time of curing is on the order of only a minute or so. The viscosity and thickness of the polymer formed may be tailored to achieve a desired index of refraction of between about 1.3 and 1.6.
Description
SYNTHETIC POLYMER FOR ENDOCAPSULAR LENS REPLACEMENT
TECHNICAL FIELD
The present invention relates to treatment of defects in the eye, and, more particularly, to the replacement of diseased or otherwise defective eye lenses.
BACKGROUND ART
Surgery on the eye is becoming more commonplace and sophisticated as new techniques and devices are developed to combat impaired sight or even blindness. One such field of surgery is the replacement of the lens in the eye which can be necessitated, for example, by cataract development, which opacifies the lens. Procedures have been developed for removal of the lens. Early procedures have Involved the removal of the lens and lens capsule (transparent membrane encapsulating the lens) by means of forceps or suction. More recently, less traumatic means have been developed; such means involve partlculating the lens, an example of which is called sonication, which involves ultrasonic disintegration of the lens by application of high frequency vibrations thereto. The lens fragments are then removed by aspiration. Replacement of the lens to avoid requiring the patient to wear spectacles with massive lenses has been investigated. Some solutions have included injecting a
viscous liquid or a silicone into the vacant lens capsule. Implantation of intraocular lenses has also been done, but the implant is rigid and not focusable and is easily dislodged by shock or vibration. More recently, G. M. Wright and T. D. Talcott in U.S. Patents 4,537,943; 4,542,542; and 4,608,050 have disclosed injection by needle of a polymeric composition into the lens capsule. The polymeric composition comprises a silicone prepolymer, a cross-linker and a platinum-based catalyst. The composition cures in the lens capsule to an optically clear, gel-like material which may accommodate, or focus, through action of the eye lens muscles.
However, a problem with the polymeric composition disclosed is that a separate heating step is required to permit removal of the needle from the eye to initiate polymerization at the injection site and thus prevent loss of polymer therefrom. Further, the time of initial cross- linking is on the order of several hours, which involves lengthy immobilization of the eye to permit complete curing.
Thus, what is required is a polymeric composition providing the advantages of the prior art while avoiding most, if not all, the problems associated with the prior art approaches.
DISCLOSURE OF INVENTION
In accordance with the invention, a synthetic polymer is provided for endocapsular lens replacement. The polymer, which is injected into the lens capsule after removal of the lens, comprises an oxygen-stabilized photosensitive prepolymer. An example of such a prepolymer comprises a polyether with urethane linkages with one or both ends capped with a functional group containing at least one
double bond, such as an acrylate, methacrylate, or a styrene.
The polymerization reaction is initiated by light using a photoinitiator such as dimethoxyphenylacetophenone and other aryl ketones and is quenched in the presence of oxygen. Contrary to the prior art polymers, the time of curing is on the order of only a minute or so. The viscosity and thickness of the polymer formed may be tailored to achieve a desired index of refraction.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1-5 are diagrammatic views of a portion of an eye, showing the procedure of lens removal, followed by injection of the polymer used in the method of the invention.
BEST MODES FOR CARRYING OUT THE INVENTION
Referring now to the drawings, wherein like numerals designate like elements throughout, a portion of an eye 10 is shown, with a probe 12 Inserted through the cornea 14 and the lens capsule 16 into the lens 18. As shown in FIG. 1, the probe, which advantageously comprises means for emitting high frequency vibrations, has caused ultrasonic disintegration of the lens 18 by a process known as sonication. In FIG. 2, the probe 12, which also includes aspiration means 12', has begun removal of the denatured protein of the lens, or lens fragments, 18. In FIG. 3, the process is complete, leaving behind the empty lens capsule 16. The particular method of disintegrating the lens and removing it is Immaterial to the practice of the invention, and thus forms no part of this invention.
In FIG. 4, a needle 20 is inserted into the same incision 22 used by the probe 12 and is used to inject a
polymer composition 24 into the lens capsule 16. The polymer is deoxygenated prior to injection.
The needle 20 is gradually withdrawn as the polymer fills the capsule 16 and the incision 22a through the cornea 14 is surgically closed. Since the polymer cures to its final state within a matter of minutes using light, no heating step is required to cure the polymer around the incision 22b in the lens capsule 16 to permit removal of the needle 20. The completely filled lens capsule 16 is depicted in FIG. 5.
The polymer composition 24 is Injected into the lens capsule 16 through slit 22b, which is typically no larger than 3 mm, and is intended to cross-link rapidly so that the composition, which is injected in a liquid state, will not squirt out the slit when the needle 20 is withdrawn.
The polymer composition used in the practice of the invention comprises (a) a prepolymer and (b) a photoinitiator. The prepolymer is preferably one that is substantially linear, with one, and preferably both, ends capped with a functional group having at least one olefinic bond. Examples of such functional groups include acrylates, methacrylates, and styrenes.
It is preferred that both ends be capped, in order to form a more homogeneous polymer. The presence of the double bond permits olefinic-type cross-linking.
Examples of suitable prepolymers include polypropylene glycols, polypropylene glycols with polyethylene glycol units, polybutylene glycols with polyethylene glycol units, urethanes, and silicones such as dimethyl silicone and ethyl silicone. The molecular weight of the prepolymer advantageously ranges from about 2,000 to 8,000, although lower or higher molecular weight material may be employed.
The photoinitiator comprises a composition which initiates polymerization of olefinic end groups in the
visible-to-near-UV region. Examples of such photoinitiators, particularly suited for causing cross-linking of acrylate groups, Include acetophenone derivatives, such as dimethoxyphenylacetophenone. The procedure for formation and removal of lens fragments 18 involves the use of a microscope and a lamp for illumination of the eye. When injecting the polymer composition 24 into the lens capsule 16, the cross-linking procedure may be performed using the same lamp employed in conjunction with the microscope used by the surgeon to remove the lens fragments 18. This lamp is of the appropriate wavelength and is of sufficient intensity to activate the photoinitiator and begin the process of cross- linking. The concentration of photoinitiator is normally about 0.25 to 2 wt%.
The time for reaction is ordinarily less than about five minutes. The observable physical properties do not seem to change after the first several minutes of cross- linking. The photoinitiator is quenched by the presence of oxygen, and accordingly, the operation may be done by continuously flushing the eye with an inert gas, such as nitrogen or argon, or with saline until the reaction is substantially complete. The prepolymer is stabilized with oxygen during storing and sample preparation and degassed in the dark before injection, such as with a vacuum pump, and back-filled with the inert gas. Normal atmosphere is sufficient to stabilize the prepolymer during handling and storage. It is well-known that the eye lens is layered, like that of an onion, with each layer having a different refractive index. The polymerized composition is essentially homogeneous. However, the viscosity and refractive index of the composition is a function of the uncapped
portion of the prepolymer, and may be configured to provide a refractive index between about 1.3 and 1.6.
Sines the polymerized composition 24 is an elastomer, the muscles of the eye 10 may still perform their normal function of accommodation. Further, the ability to tailor the polymerized composition in terms of elasticity, viscosity and refractive index means that the lens formation, when done in conjunction with the sonication lens removal, may be performed early in the process of cataract formation.
EXAMPLES
Polyether glycols of average molecular weights between 1,000 and 4,000 were combined through urethane linkages using diisocyanates such as isophorone diisocyanate (Fluka Chemical Corp., Hauppauge, NY) or methylene bis (4- cyclohexyldiisocyanate) (Mobay Chemical Corp., Pittsburgh, PA). The ends were then capped with a compound containing a terminal alkene such as isocyanatoethyl methacrylate (Dow Chemical Co., Midland, MI) or 2-hydroxγethyl methacrylate (Aldrich Chemical Co., Milwaukee, WI). Reactions were catalyzed by a tin compound such as stannous dioctan- oate. The resultant prepolymer was a colorless liquid with viscosity sufficiently low so that it could be Injected by syringe through a 20 gauge needle. The material could be purified, if necessary, through various known chromato- graphic methods. BHT (25 to 100 ppm) may be added to stabilize the polymer.
The polymer was thoroughly mixed with the appropriate quantity of photoinitiator, such as 2,2-dimethoxy-2-phenyl acetophenone (Aldrich Chemical Co.), transferred to a syringe, then pumped in vacuo, protected from light, for
at least 24 hrs. The polymer-filled syringe was stored, protected from light, under an inert atmosphere.
The Table below lists various polymer formulations prepared pursuant to the foregoing teachings.
Legend:
Voranol (1965) - Polypropylene glycol end capped with 12% ethylene oxide; MW = 1,965
Voranol (3829) - Polypropylene glycol end capped with
22% ethylene oxide; MW = 3,829
PPG-4000 - Polypropylene glycol; MW = 4,000
EPG-3000 - Polypropylene glycol; MW = 3,000 Terethane (650) - Polytetramethylene glycol; MW = 650
IPDI - Isophorone diisocyanate
DesW - Desmodur W [methylene bis(4-cyclohexylisocyanate)]
Sn(Oc)2 - Stannous dioctanoate IEM - Isocyanatoethyl methacrylate
HEA - 2-Hydroxyethyl acrylate
HEM - 2-Hydroxyethyl methacrylate
DMPA - 2,2-Dimethoxy-2-phenylacetophenone
Several of the foregoing polymers (Nos. 1, 2, 5, 6, 7) were injected into lens capsules of rabbits. Photo cross-linking was promoted by the visible light used to illuminate the surgical procedure. The polymer was stabilized in the lens shape within 1 to 2 minutes and reaction was complete within 5 minutes.
The mechanism for the photoinitiation apparently involves homolytic cleavage of the initiator to give two radicals, which then initiate the cross-linking reaction. Because molecular oxygen reacts with radicals, deoxygenation of the monomer allows for rapid cross-linking.
The resultant in situ cross-linked polymer was a transparent plastic with variable elasticity, depending on the degree of cross-linking and chemical composition.
Thus, a method of endocapsular lens replacement by forming a synthetic polymer in the lens capsule of an eye after removal of the lens has been disclosed. The method comprises injecting a photosensitive prepolymer into the lens capsule in the absence of oxygen. It will be clear to one of ordinary skill in the art that various changes and modifications of an obvious nature may be made without
departing from the spirit of the invention, and all such changes and modifications are considered to be within the scope of the invention, as defined by the appended claims.
Claims
1. A method of endocapsular lens replacement by forming a synthetic polymer in the lens capsule of an eye after removal of the lens comprising: injecting a photosensitive prepolymer into said lens capsule in the absence of oxygen.
2. The method of Claim 1 wherein said photosensitive prepolymer includes a photoinitiator.
3. The method of Claim 2 wherein said photoinitiator comprises an acetophenone derivative.
4. The method of Claim 3 wherein said photoinitiator comprises dimethoxyphenylacetophenone.
5. The method of Claim 2 wherein said photoinitiator is present in an amount ranging from about 0.25 to 2 wt%.
6. The method of Claim 2 wherein said photoinitiator is activated by exposure to visible-to-near-UV radiation.
7. The method of Claim 1 wherein said prepolymer comprises an oxygen-stabilized composition.
8. The method of Claim 1 wherein said prepolymer is substantially linear, with at least one end capped with a functional group having at least one olefinic bond.
9. The method of Claim 8 wherein said functional group is one selected from the group consisting of acrylates, methacrylates, and styrenes.
10. The method of Claim 9 wherein said functional group comprises methylacrylate.
11. The method of Claim 8 wherein said prepolymer comprises a composition selected from the group consisting of urethanes, polypropylene glycols, polypropylene glycols with polyethylene glycol units, polybutylene glycols with polyethylene glycol units, and silicones.
12. A method of endocapsular lens replacement by forming a synthetic polymer in the lens capsule of an eye after removal of the lens comprising: injecting an oxygen-stabilized photosensitive prepolymer which includes a photoinitiator into said lens capsule In the absence of oxygen.
13. The method of Claim 12 wherein said photoinitiator comprises an acetophenone derivative.
14. The method of Claim 13 wherein said photoinitiator comprises dimethoxyphenylacetophenone.
15. The method of Claim 12 wherein said photoinitiator is present in an amount ranging from about 0.25 to 2 wt%.
16. The method of Claim 12 wherein said photoinitiator is activated by exposure to vislble-to-near-UV radiation.
17. The method of Claim 12 wherein said prepolymer is substantially linear, with at least one end capped with a functional group having at least one olefinic bond.
18. The method of Claim 17 wherein said functional group is one selected from the group consisting of acrylates, methacrylate, and styrenes.
19. The method of Claim 18 wherein said functional group comprises methylacrylate.
20. The method of Claim 17 wherein said prepolymer comprises a composition selected from the group consisting of urethanes, polypropylene glycols, polypropylene glycols with polyethylene glycol units, polybutylene glycols with polyethylene glycol units, and silicones.
21. A method of endocapsular lens replacement by forming a synthetic polymer in the lens capsule of an eye after removal of the lens comprising: injecting an oxygen-stabilized photosensitive prepolymer which includes a photoinitiator comprising an acetophenone into said lens capsule in the absence of oxygen, said prepolymer comprising a polyether having both ends capped with an acrylate group.
22. The method of Claim 21 wherein said photoinitiator comprises dimethoxyphenylacetophenone.
23. The method of Claim 22 wherein said photoinitiator is present in an amount ranging from about 0.25 to 2 wt%.
24. The method of Claim 22 wherein said photoinitiator is activated by exposure to visible-to-near-UV radiation.
25. The method of Claim 21 wherein said functional group comprises methylacrylate.
26. An oxygen-stabilized photosensitive prepolymer composition including a photoinitiator.
27. The composition composition of Claim 26 wherein said photoinitiator comprises an acetophenone derivative.
28. The composition of Claim 27 wherein said photoinitiator comprises dimethoxyphenylacetophenone.
29. The composition of Claim 26 wherein said photoinitiator is present in an amount ranging from about 0.25 to 2 wt%.
30. The composition of Claim 26 wherein said photoinitiator is activated by exposure to visible-to-near-UV radiation.
31. The composition of Claim 26 wherein said prepolymer is substantially linear, with at least one end capped with a functional group having at least one olefinic bond.
32. The composition of Claim 31 wherein said functional group is one selected from the group consisting of acrylates, methacrylates, and styrenes.
33. The composition of Claim 32 wherein said functional group comprises methylacrylate.
34. The composition of Claim 31 wherein said prepolymer comprises a composition selected from the group consisting of urethanes, polypropylene glycols, polypropylene glycols with polyethylene glycol units, polybutylene glycols with polyethylene glycol units, and silicones.
35. The composition of Claim 26 wherein said prepolymer is stabilized by the presence of atmospheric oxygen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7006087A | 1987-07-06 | 1987-07-06 | |
US070,060 | 1987-07-06 |
Publications (1)
Publication Number | Publication Date |
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WO1989000029A1 true WO1989000029A1 (en) | 1989-01-12 |
Family
ID=22092876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1988/002196 WO1989000029A1 (en) | 1987-07-06 | 1988-06-30 | Synthetic polymer for endocapsular lens replacement |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2129788A (en) |
CA (1) | CA1330951C (en) |
WO (1) | WO1989000029A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0414219A2 (en) * | 1989-08-22 | 1991-02-27 | THERA Patent GmbH & Co. KG Gesellschaft für industrielle Schutzrechte | Use of photopolymerizable compositions as filling material for intra-ocular lenses for the treatment of cataracts or other diseases of the eye |
EP0557128A1 (en) * | 1992-02-19 | 1993-08-25 | The University Of Miami | Spatula for adjustable keratoplasty |
US5326346A (en) * | 1992-07-27 | 1994-07-05 | Board Of Regents, The University Of Texas System | Light-cured urethane dimethacrylate ocular prosthesis |
WO2001056508A1 (en) | 2000-02-03 | 2001-08-09 | Accommo Ag | Lens implant |
WO2001085067A2 (en) * | 2000-05-09 | 2001-11-15 | Unisearch Limited | Supplementary endo-capsular lens and method of implantation |
US7060095B2 (en) | 2001-05-08 | 2006-06-13 | Unisearch Limited | Supplementary endo-capsular lens and method of implantation |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4543398A (en) * | 1983-04-28 | 1985-09-24 | Minnesota Mining And Manufacturing Company | Ophthalmic devices fabricated from urethane acrylates of polysiloxane alcohols |
US4608050A (en) * | 1983-07-21 | 1986-08-26 | Innovative Surgical Products, Inc. | Correction of defects in the eye and compositions therefor |
US4638040A (en) * | 1983-06-03 | 1987-01-20 | Minnesota Mining And Manufacturing Company | Acrylate and methacrylate monomers and polymers |
US4673539A (en) * | 1983-06-03 | 1987-06-16 | Minnesota Mining And Manufacturing Company | Process for thermoformed articles |
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1988
- 1988-06-28 CA CA000570656A patent/CA1330951C/en not_active Expired - Fee Related
- 1988-06-30 WO PCT/US1988/002196 patent/WO1989000029A1/en unknown
- 1988-06-30 AU AU21297/88A patent/AU2129788A/en not_active Abandoned
Patent Citations (4)
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US4543398A (en) * | 1983-04-28 | 1985-09-24 | Minnesota Mining And Manufacturing Company | Ophthalmic devices fabricated from urethane acrylates of polysiloxane alcohols |
US4638040A (en) * | 1983-06-03 | 1987-01-20 | Minnesota Mining And Manufacturing Company | Acrylate and methacrylate monomers and polymers |
US4673539A (en) * | 1983-06-03 | 1987-06-16 | Minnesota Mining And Manufacturing Company | Process for thermoformed articles |
US4608050A (en) * | 1983-07-21 | 1986-08-26 | Innovative Surgical Products, Inc. | Correction of defects in the eye and compositions therefor |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0414219A2 (en) * | 1989-08-22 | 1991-02-27 | THERA Patent GmbH & Co. KG Gesellschaft für industrielle Schutzrechte | Use of photopolymerizable compositions as filling material for intra-ocular lenses for the treatment of cataracts or other diseases of the eye |
EP0414219A3 (en) * | 1989-08-22 | 1992-02-26 | Thera Patent Gmbh & Co. Kg Gesellschaft Fuer Industrielle Schutzrechte | Use of photopolymerizable filter compositions for intra-ocular lenses for the treatment of cataracts or other diseases of the eye |
US5224957A (en) * | 1989-08-22 | 1993-07-06 | Thera Patent Gmbh & Co. | Method of providing a composition for an eye |
EP0557128A1 (en) * | 1992-02-19 | 1993-08-25 | The University Of Miami | Spatula for adjustable keratoplasty |
US5326346A (en) * | 1992-07-27 | 1994-07-05 | Board Of Regents, The University Of Texas System | Light-cured urethane dimethacrylate ocular prosthesis |
WO2001056508A1 (en) | 2000-02-03 | 2001-08-09 | Accommo Ag | Lens implant |
US6960230B2 (en) | 2000-02-03 | 2005-11-01 | Accommo Ag | Lens implant |
WO2001085067A2 (en) * | 2000-05-09 | 2001-11-15 | Unisearch Limited | Supplementary endo-capsular lens and method of implantation |
WO2001085067A3 (en) * | 2000-05-09 | 2002-03-28 | Unisearch Ltd | Supplementary endo-capsular lens and method of implantation |
US7060095B2 (en) | 2001-05-08 | 2006-06-13 | Unisearch Limited | Supplementary endo-capsular lens and method of implantation |
Also Published As
Publication number | Publication date |
---|---|
CA1330951C (en) | 1994-07-26 |
AU2129788A (en) | 1989-01-30 |
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