US20040230300A1 - Accommodating positive and negative intraocular lens system - Google Patents
Accommodating positive and negative intraocular lens system Download PDFInfo
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- US20040230300A1 US20040230300A1 US10/871,935 US87193504A US2004230300A1 US 20040230300 A1 US20040230300 A1 US 20040230300A1 US 87193504 A US87193504 A US 87193504A US 2004230300 A1 US2004230300 A1 US 2004230300A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/02—Artificial eyes from organic plastic material
- B29D11/023—Implants for natural eyes
- B29D11/026—Comprising more than one lens
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- 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
-
- 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
- A61F2/1629—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 for changing longitudinal position, i.e. along the visual axis when implanted
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- 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
- A61F2/1635—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 for changing shape
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- 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
- A61F2/1648—Multipart 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
- A61F2002/1681—Intraocular lenses having supporting structure for lens, e.g. haptics
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0053—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in optical properties
Abstract
Description
- This application is a continuation of U.S. Ser. No. 09/434,635 filed Nov. 5, 1999.
- The present invention relates to an intraocular lens (IOL) system and a method for making and using the same. More particularly, the present invention relates to an accommodating IOL system designed for multi-distance visual imaging in aphakic eyes where a diseased natural lens has been surgically removed, such as in the case of cataracts.
- IOL implants have been used for many years in aphakic eyes as replacements for diseased natural crystalline lenses that have been surgically removed from the eyes. Many different IOL designs have been developed over past years and proven successful for use in aphakic eyes. Successful IOL designs to date primarily include an optic portion with supports therefor, called haptics, connected to and surrounding at least part of the optic portion. The haptic portions of an IOL are designed to support the optic portion of the IOL in the lens capsule, anterior chamber or posterior chamber of an eye.
- Commercially successful IOLs have been made from a variety of biocompatible materials, ranging from more rigid materials such as polymethylmethacrylate (PMMA) to softer, more flexible materials capable of being folded or compressed such as silicones, certain acrylics, and hydrogels. Haptic portions of the IOLs have been formed separately from the optic portion and later connected thereto through processes such as heat, physical staking and/or chemical bonding. Haptics have also been formed as an integral part of the optic portion in what is commonly referred to as “single-piece” IOLs.
- Softer, more flexible IOLs have gained in popularity in more recent years due to their ability to be compressed, folded, rolled or otherwise deformed. Such softer IOLs may be deformed prior to insertion thereof through an incision in the cornea of an eye. Following insertion of the IOL in an eye, the IOL returns to its original pre-deformed shape due to the memory characteristics of the soft material. Softer, more flexible IOLs as just described may be implanted into an eye through an incision that is much smaller, i.e., 2.8 to 3.2 mm, than that necessary for more rigid IOLs, i.e., 4.8 to 6.0 mm. A larger incision is necessary for more rigid IOLs because the lens must be inserted through an incision in the cornea slightly larger than the diameter of the inflexible IOL optic portion. Accordingly, more rigid IOLs have become less popular in the market since larger incisions have been found to be associated with an increased incidence of postoperative complications, such as induced astigmatism.
- After IOL implantation, both softer and more rigid IOLs are subject to compressive forces exerted on the outer edges thereof from natural brain-induced contraction and relaxation of the ciliary muscle and increases and decreases in vitreous pressure. Compressive forces of this kind are useful in a phakic eye for focusing the eye at various distances. Most commercially successful IOL designs for use in aphakic eyes have single focus optic portions that are fixed and focus the eye at only a certain fixed distance. Such fixed single focus IOLs require the wearing of glasses to change the focus of the eye. A few fixed bifocal IOLs have been introduced to the commercial market but suffer from the disadvantage that each bifocal image represents only about forty percent of the available light thus lessening visual acuity.
- Because of the noted shortcomings of current IOL designs, there is a need for accommodating IOLs designed to provide improved visual imaging at various distances in aphakic eyes without the aid of eyeglasses.
- An accommodating intraocular lens (IOL) system made in accordance with the present invention has a positive intraocular lens used in conjunction with a negative intraocular lens. The positive intraocular lens has a “higher” diopter, preferably approximately +20 diopter or greater, such as but not limited to +20 to +60 diopter, positive optic portion with an outer peripheral edge and two or more but preferably two, three or four haptic elements for supporting the optic portion in a patient's eye. The negative intraocular lens has a “lower” diopter, preferably approximately −10 diopter or less, such as but not limited to −10 to −50 diopter, negative optic portion also having an outer peripheral edge and preferably the same, but optionally a different number of haptics from that of the positive optic portion. Positive and negative intraocular lenses each having two haptic elements are balanced for stability within an eye to minimize decentration by having a haptic element integrally formed with or subsequently attached to two opposed edges of each of the two optic portions. Positive and negative intraocular lenses each having three haptic elements are balanced to achieve stability and minimize decentration by having a set of two haptic elements integrally formed with or subsequently attached to one edge of each of the optic portions and a third haptic element integrally formed with or subsequently attached to an opposite edge of each of the optic portions. Positive and negative lenses each having four haptic elements are balanced to achieve stability and minimize decentration by each optic portion having a set of two haptic elements integrally formed with or subsequently attached to one edge of the optic and a set of two haptic elements integrally formed with or subsequently attached to an opposite edge of the optic. Each haptic element has an attachment portion that permanently connects the haptic element to the outer peripheral edge of an optic portion. If the haptic element is of a looped design, the haptic element has generally two attachment portions that permanently connect the looped haptic element to the outer peripheral edge of the optic portion. In the case of lenses having three or four looped haptic elements, a set of two looped haptic elements may have three attachment portions rather than four. In such a case, one of the three attachment portions is common to each of the two looped haptic elements in the set. Each haptic element whether of a loop design or not includes a flexible central portion located between the attachment portion and a contact plate. The contact plate is designed to engage an inner surface of a patient's eye. The flexible central portions that extend between the contact plates and the attachment portions allow the optic portions of both the positive and negative lenses to move or to adjust to pressures exerted on the positive and negative lenses within the eye. Additionally, within these flexible central portions, each haptic element is designed to have less resistance to bending in a plane generally parallel to the optical axis of an eye than in a plane generally perpendicular to the optical axis of an eye. By providing haptic elements with this type of flexibility characteristic, the present accommodating IOL system achieves axial displacement of the positive optic portion with regard to the negative optic portion along the optical axis of the eye when compressive forces are exerted against the accommodating IOL system. Also, by combining a higher diopter positive optic portion with that of a lower diopter negative optic portion, an additive effect is achieved whereby even slight movement or axial displacement of the higher diopter positive optic portion with regard to the lower diopter negative optic portion achieves a significantly large increase in accommodative effect and improved multi-distance visual imaging without the aid of eyeglasses.
- Accordingly, it is an object of the present invention to provide accommodating intraocular lens systems for use in aphakic eyes.
- Another object of the present invention is to provide accommodating intraocular lens systems for use in aphakic eyes, which achieves axial displacement of the higher diopter optic portion with regard to the lower diopter optic portion along the optical axis of the eyes.
- Another object of the present invention is to maximize accommodative effects of the intraocular lens system with even minimal optic axial displacement.
- Another object of the present invention is to provide accommodating intraocular lens systems for use in aphakic eyes, which minimize damage to tissues in the interior of the eyes.
- Still another object of the present invention is to provide accommodating intraocular lens systems, which are resistant to decentration within the eyes.
- These and other objectives and advantages of the present invention, some of which are specifically described and others that are not, will become apparent from the detailed description, drawings and claims that follow, wherein like features are designated by like numerals.
- FIG. 1 is a schematic representation of the interior of a human eye;
- FIG. 2 is a plan view of an accommodating IOL system with each optic portion having three haptics made in accordance with the present invention;
- FIG. 3 is a side view of the IOL system of FIG. 2;
- FIG. 4 is a cross sectional view of the IOL system of FIG. 2 taken along line4-4;
- FIG. 5 is a side view of the haptic elements of FIG. 3 with sharper edges;
- FIG. 6 is a side view of the haptic elements of FIG. 3 with rounded edges;
- FIG. 7 is a cross sectional view of the haptic elements of FIG. 5 with a stiffening element;
- FIG. 8 is a plan view of an accommodating IOL system with each optic portion having four haptics made in accordance with the present invention;
- FIG. 9 is a side view of the IOL system of FIG. 8;
- FIG. 10 is a plan view of an accommodating IOL system with each optic portion having two haptics made in accordance with the present invention; and
- FIG. 11 is a side view of the IOL of FIG. 10.
- FIG. 1 illustrates a simplified diagram of an
eye 10 showing landmark structures relevant to the implantation of an intraocular lens of the present invention. Eye 10 includes an opticallyclear cornea 12 and aniris 14. A naturalcrystalline lens 16 and aretina 18 are located behind theiris 14 ofeye 10.Eye 10 also includesanterior chamber 20 located in front ofiris 14 and aposterior chamber 22 located betweeniris 14 andnatural lens 16. Accommodating IOL systems of the present invention are preferably implanted inlens capsule 24 after the removal of diseasednatural lens 16.Eye 10 also includes an optical axis OA-OA that is an imaginary line that passes through theoptical center 26 ofanterior surface 28 andposterior surface 30 ofnatural lens 16. Optical axis OA-OA in thehuman eye 10 is generally perpendicular to a portion ofcornea 12,natural lens 16 andretina 18. - The IOL system of the present invention, as illustrated in FIGS. 2 through 11 but best illustrated in FIGS. 2, 8 and10, is identified generally by
reference numeral 32.IOL system 32 comprises apositive lens 33 having a higherdiopter optic portion 34 with an outerperipheral edge 36 and anegative lens 35 having a lowerdiopter optic portion 37 with an outerperipheral edge 39.IOL system 32 is designed for implantation preferably inlens capsule 24 of a patient'seye 10. Alternatively,positive lens 33 may be placed inlens capsule 24 andnegative lens 35 may be manufactured as a standard anterior chamber intraocular lens to minimize tissue damage, such as that disclosed in U.S. Pat. No. 5,300,117, incorporated herein in its entirety by reference, and positioned withinanterior chamber 20. WhenIOL system 32 is positioned withinlens capsule 24 ofeye 10,positive lens 33 is preferably positioned anterior tonegative lens 35 and anteriorly vaulted, i.e., vaulted towardiris 14, andnegative lens 35 positioned posterior topositive lens 33 and posteriorly vaulted, i.e., vaulted towardretina 18. A vault of approximately 1.0 to 2.0 mm measuring from the plane of outerperipheral edges optic portions haptic contact plates peripheral edges optic portions haptic elements edge portion Haptic elements peripheral edges optic portions attachment portions 44. Alternatively however,haptic elements optic portions haptic element contact plate inner surfaces 50 inlens capsule 24 ofeye 10. Broadenedcontact plates plate 41 having atrough 70 andcontact plate 38 having aridge 72 to achieve preferably nonpermanent, but alternatively permanent, interlocking ofpositive lens 33 and negative lens 35 (FIG. 11) or anextended tab 74 onedge 45 ofcontact plate 41 to achieve preferably nonpermanent, but alternatively permanent, interlocking withedge 42 ofcontact plate 38 of positive lens 33 (FIG. 3). As another alternative, best illustrated in FIG. 8,contact plates positive lens 33 andnegative lens 35 may be positioned so as to avoid direct contact upon placement withinlens capsule 24. - In accordance with the present invention,
haptic elements IOL system 32 is implanted in thelens capsule 24 of a patient'seye 10 and held in place through compressive forces exerted byinner surfaces 50 oncontact plates haptic elements haptic elements contact plates surfaces 50 ineye 10. Accordingly,haptic elements optic portions IOL system 32 and generally parallel to that of optical axis OA-OA ofeye 10.Haptic elements lens 33 with respect tolens 35. WhenIOL system 32 is implanted withinlens capsule 24,lens 35 may be fixed wherebyonly lens 33 is axially displaced to achieve multi-distance visual imaging. However, it is preferable to maximize accommodative effects through opposed axial displacement of bothlenses higher diopter lens 33 and designing this type of flexibility characteristic intohaptic elements IOL system 32 achieves maximum accommodative effect to allow an eye to achieve multi-distance visual imaging without the aid of eyeglasses. The flexibility characteristic and vaulting ofhaptic elements optic portions eye 10. Compressive forces of differing magnitudes within the range of approximately 0.1 to 5 mN exerted againstcontact plates haptic elements IOL system 32, such as that caused by natural brain-induced forces withineye 10, results in approximately 1.0 mm to 3.0 mm combined opposed axial displacement ofoptic portions eye 10. By combining a higher diopter positive optic portion with that of a lower diopter negative optic portion, an additive effect is achieved whereby even slight movement or axial displacement of the higher diopter positive optic portion with regard to the lower diopter negative optic portion results in a disproportionately large increase in accommodative effect and improved multi-distance visual imaging without the aid of eyeglasses. For example, if one were to use a +50 diopter positive intraocular lens in conjunction with a −30 diopter negative intraocular lens for a combined +20 diopter effect, one achieves at least double the accommodative effect achieved using a single +20 diopter positive intraocular lens. By adding axial displacement of the higher diopter positive lens with respect to the lower diopter negative lens, the accommodative effects of theIOL system 32 are even greater. TheIOL system 32 of the present invention with its maximized accommodative effects through the axial displacement ofoptic portion 34 with respect tooptic portion 37 enables an eye to achieve multi-distance visual imaging when compressive forces are applied to eye 10 without the use of eyeglasses. - The flexibility characteristic of
haptic elements IOL system 32 as described above is achieved through the unique design thereof. As best illustrated in FIG. 2,IOL system 32 hashaptic elements central portions 62 adjacent toattachment portions 44 permanently connected to outerperipheral edges optic portions central portions 62 are essential in imparting the necessary flexibility to the IOLs of the present invention. Flexiblecentral portions 62 have a dimension in plane 46-46 generally parallel to optical axis OA-OA, as depicted in FIGS. 3, 9 and 11, less than or equal to but most preferably less than the same in plane 48-48 generally perpendicular to optical axis OA-OA as depicted in FIG. 2, 8 and 10.Contact plates rounded edges 52 as depicted in FIG. 6 to provide a smoother fit withinner surfaces 50, or more defined,sharper edges 54 as depicted in FIG. 7 to provide a barrier to prevent cellular migration and growth upon implantation inlens capsule 24. - The
subject IOL system 32 is preferably manufactured to haveoptic portions peripheral edge 36.Haptic elements optic portions IOL system 32 in a generally rounded or oval configuration and will increase or decrease in overall length depending upon the size ofIOL system 32 desired and the diameter ofoptic portions optic portions 34 and/or 37 increases, the overall length ofhaptic elements 40 and/or 43 may be decreased. Likewise, as the diameter ofoptic portions 34 and/or 37 decreases, the overall length ofhaptic elements 40 and/or 43 may be increased. However, as customary, the overall length of thehaptic elements IOL system 32 sizes rather than varying the sizes ofoptic portions 34 and/or 37. In general, loopedhaptic elements common attachment portions 44 onperipheral edges contact plates haptic elements haptic elements attachment portion 44 onperipheral edges contact plates haptic elements lens capsule 24 while allowing axial deflection under compressive forces. For purposes of the present invention, the generally rounded or oval shape of looped and non-loopedhaptic elements haptic elements central portion 62 ofhaptic elements Contact plates - As provided through the dimensions of
IOL system 32 above, looped and non-loopedhaptic elements contact plates attachment portions 44 andoptic portions central portions 62 preferably exhibiting a thinner dimension in plane 46-46 than that of the width in plane 48-48. Loopedhaptic elements subject IOL system 32 tend to resist deflection into closer proximity with outerperipheral edges contact plates IOL system 32 is used as a refractive lens, stable, reliable multi-distance visual imaging is provided. - The desired flexibility characteristic of
haptic elements IOL system 32 may likewise be achieved or enhanced by incorporating astiffening element 60, in the shape of a wide, very thin ribbon, in one or morehaptic elements element 60 may be positioned inhaptic elements flat face 62 is oriented in a plane parallel to that of plane 48-48 so as to be thin axially in a plane parallel to that of plane 46-46. Stiffeningelement 60 functions in a manner similar to that of an I-beam in construction to maximize axial displacement along optical axis OA-OA when compressive force is applied to contactplates - Stiffening
element 60 is formed of a less flexible material than that ofIOL system 32. Suitable materials for stiffeningelement 60 include but are not limited to polymethyl methacrylate, polyimides, polyolefins, high-density polyethylenes, polyesters, nylons, metals or any biocompatible material with suitable stiffening characteristics. Stiffeningelement 60 may be fabricated using one or more layers of a mesh, screen, webbing and/or sheet to impart the desired flexibility characteristics described herein. Stiffeningelement 60 may be used in conjunction withhaptic elements - Suitable materials for the production of the
subject IOL system 32 include but are not limited to foldable or compressible materials, such as silicone polymers, hydrocarbon and fluorocarbon polymers, hydrogels, soft acrylic polymers, polyesters, polyamides, polyurethane, silicone polymers with hydrophilic monomer units, fluorine-containing polysiloxane elastomers and combinations thereof. The preferred material for the production ofIOL system 32 of the present invention is a hydrogel made from 2-hydroxyethyl methacrylate (HEMA) and 6-hydroxyhexyl methacrylate (HOHEXMA), i.e., poly(HEMA-co-HOHEXMA). Poly(HEMA-co-HOHEXMA) is the preferred material for the manufacture ofIOL 32 due to its equilibrium water content of approximately 18 percent by weight, and high refractive index of approximately 1.474, which is greater than that of the aqueous humor of the eye, i.e., 1.336. A high refractive index is a desirable feature in the production of IOLs to impart high optical power with a minimum of optic thickness. By using a material with a high refractive index, visual acuity deficiencies may be corrected using a thinner IOL. Poly(HEMA-co-HOHEXMA) is a desirable material in the production ofIOL system 32 due to its mechanical strength, which is suitable to withstand considerable physical manipulation. Poly(HEMA-co-HOHEXMA) also has desirable memory properties suitable for IOL use. IOLs manufactured from a material possessing good memory properties such as those of poly(HEMA-co-HOHEXMA) unfold in a more controlled manner in an eye, rather than explosively, to its predetermined shape. The unique design of thesubject IOL system 32 withhaptic elements eye 10. Explosive unfolding of IOLs is undesirable due to potential damage to delicate tissues within the eye. Poly(HEMA-co-HOHEXMA) also has dimensional stability in the eye, which is desirable. - Although the teachings of the present invention are preferably applied to soft or foldable IOLs formed of a foldable or compressible material, the same may also be applied to harder, less flexible lenses formed of a relatively rigid material such as polymethylmethacrylate (PMMA) having flexible haptics formed either of the same or a different material.
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Positive optic portion 34 ofIOL system 32 can be a positive powered lens of approximately +20 diopter or greater but preferably approximately +20 to +60 diopter andnegative optic portion 37 ofIOL system 32 can be a negative powered lens of approximately -10 diopter or less but preferably −10 to −50 diopter.Optic portions eye 10. From the perspective of fit withineye 10 and performance, preferablypositive lens 33 is convex-plano andnegative lens 35 is plano-convex so the piano surface ofpositive lens 33 is in close proximity to the piano surface ofnegative lens 35, but most preferably,positive lens 33 is convex-plano andnegative lens 35 is concave-plano so the piano surface ofpositive lens 33 is in close proximity to the concave surface ofnegative lens 35. -
Optic portions subject IOL system 32 may optionally be formed with aglare reduction zone 56 of approximately 0.25 to 2.00 mm but more preferably approximately 0.3 to 0.6 mm and most preferably 0.5 mm in width adjacent outerperipheral edge peripheral edge IOL system 32 is struck by light enteringeye 10 during high light or at other times whenpupil 58 is dilated.Glare reduction zone 56 is typically fabricated of the same material asoptic portions -
Subject IOL system 32 may or may not be of a unitary design and may be molded or most preferably manufactured by first producing disks from a material of choice as described in U.S. Pat. Nos. 5,217,491 and 5,326,506, each incorporated herein in its entirety by reference. If manufactured from disks, positive andnegative lenses negative lenses -
Subject IOL system 32 is used ineye 10 by creating an incision incornea 12 andcapsule 24, removingnatural lens 16, insertingnegative lens 35 andpositive lens 33 as a unitary device or individually intocapsule 24 and closing the incision. Preferably,lenses capsule 24 individually to allow for easier lens folding and smaller incision size. Alternatively, thesubject IOL system 32 may be used ineye 10 by creating an incision incornea 12 andcapsule 24, removingnatural lens 16, insertingpositive lens 33 intocapsule 24, insertingnegative lens 35 intoanterior chamber 20 and closing the incision. -
IOL system 32 of the present invention provides for an accommodating lens suitable for use in anaphakic eye 10.IOL system 32 comprises two intraocular lens each havinghaptic elements optic portions eye 10 thereby enabling an eye to achieve multi-distance visual imaging without the aid of eyeglasses. - While there is shown and described herein certain specific embodiments of the present invention, it will be manifest to those skilled in the art that various modifications may be made without departing from the spirit and scope of the underlying inventive concept and that the same is not limited to the particular forms herein shown and described except insofar as indicated by the scope of the appended claims.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/871,935 US20040230300A1 (en) | 1999-11-05 | 2004-06-18 | Accommodating positive and negative intraocular lens system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US09/434,635 US6767363B1 (en) | 1999-11-05 | 1999-11-05 | Accommodating positive and negative intraocular lens system |
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US8556967B2 (en) | 1999-04-09 | 2013-10-15 | Faezeh Mona Sarfarazi | Interior bag for a capsular bag and injector |
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US8343216B2 (en) | 2002-01-14 | 2013-01-01 | Abbott Medical Optics Inc. | Accommodating intraocular lens with outer support structure |
US9504560B2 (en) | 2002-01-14 | 2016-11-29 | Abbott Medical Optics Inc. | Accommodating intraocular lens with outer support structure |
US10206773B2 (en) | 2002-12-05 | 2019-02-19 | Johnson & Johnson Surgical Vision, Inc. | Accommodating intraocular lens and method of manufacture thereof |
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US9603703B2 (en) | 2009-08-03 | 2017-03-28 | Abbott Medical Optics Inc. | Intraocular lens and methods for providing accommodative vision |
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US10350057B2 (en) | 2013-02-14 | 2019-07-16 | Shifamed Holdings, Llc | Hydrophilic AIOL with bonding |
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Also Published As
Publication number | Publication date |
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JP2003513705A (en) | 2003-04-15 |
MXPA02004423A (en) | 2002-09-02 |
DE60037902D1 (en) | 2008-03-13 |
DE60037902T2 (en) | 2009-01-29 |
AR026330A1 (en) | 2003-02-05 |
AU1229301A (en) | 2001-06-06 |
ATE384493T1 (en) | 2008-02-15 |
US6767363B1 (en) | 2004-07-27 |
HK1049598B (en) | 2008-06-27 |
CA2389923C (en) | 2006-01-24 |
EP1227773A1 (en) | 2002-08-07 |
HK1049598A1 (en) | 2003-05-23 |
CN1217632C (en) | 2005-09-07 |
CN1720877A (en) | 2006-01-18 |
BR0015569A (en) | 2002-07-30 |
ES2300278T3 (en) | 2008-06-16 |
SG148832A1 (en) | 2009-01-29 |
WO2001034067A1 (en) | 2001-05-17 |
EP1227773B1 (en) | 2008-01-23 |
CN1384727A (en) | 2002-12-11 |
AU774948B2 (en) | 2004-07-15 |
CA2389923A1 (en) | 2001-05-17 |
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