CA1074054A - Artificial intraocular lens and supporting system therefor - Google Patents
Artificial intraocular lens and supporting system thereforInfo
- Publication number
- CA1074054A CA1074054A CA265,798A CA265798A CA1074054A CA 1074054 A CA1074054 A CA 1074054A CA 265798 A CA265798 A CA 265798A CA 1074054 A CA1074054 A CA 1074054A
- Authority
- CA
- Canada
- Prior art keywords
- lens
- pseudophakos
- pupil
- arms
- clips
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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
- 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
- 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
- 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
- A61F2002/1683—Intraocular lenses having supporting structure for lens, e.g. haptics having filiform haptics
Abstract
ARTIFICIAL INTRACCULAR LENS
AND
SUPPORTING SYSTEM THEREFOR
Abstract of the Disclosure A lens suitable for implantation in an aphakic eye is provided with a supporting system useful in positioning the lens in either the posterior or anterior chamber and which accommodates to normal function of a dynamic pupil. The supporting system includes flexible spring-like members structurally designed to follow a dilating and contracting pupil with negligible force against a normally dilated iris diaphragm while providing for automatic centration in the pupil and permanent longitudinal fixation of the lens under normal and extreme conditions of dilation.
AND
SUPPORTING SYSTEM THEREFOR
Abstract of the Disclosure A lens suitable for implantation in an aphakic eye is provided with a supporting system useful in positioning the lens in either the posterior or anterior chamber and which accommodates to normal function of a dynamic pupil. The supporting system includes flexible spring-like members structurally designed to follow a dilating and contracting pupil with negligible force against a normally dilated iris diaphragm while providing for automatic centration in the pupil and permanent longitudinal fixation of the lens under normal and extreme conditions of dilation.
Description
Background of the Invention Field of the Invention:
This invention relates to improvements in ophthalmo-logy and more particularly to supporting systems for artificial intraocular lenses (pseudophakoi) used for the correction of aphakia and re-establishment of binocularity in aphakia.
Disc~ssion of the Prior Art:
Well-fixed and well-center~d intraocular lens implants are known to produce stable retinal images and offer the best chance of re-establishment of binocularity in cases of aphakia.
A characteristic common to presently employed lenses which thwarts the normal activity of the aphakic eye's pupil, however, is the maintenance of a constant minimal pupil size as determined by the radial spacing of posterior projections of -non-yielding post-irido loops or clips. A pilocarpine regimen is usually necessary to avoid accidental lens dislocation occurring as a result of pupil dilation.
Supporting systems which can accommodate for normal dilation and contraction of a dynamic pupil have been made the subject of applicant's U.S. Patent No. 3,975,779, issued August 24, 1976.
These latter systems, having been designed to apply a constant holding force against the pupil margin under maximum normal dilation and beyond (i.e. medically induced abnormal dilation) for purposes of avoiding axial displacement of the pseudophakos, have a disadvantage of tending, in some applica-tions of use, to traumatize the pupil margin and/or produce ex-..
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- . : .. : , ::
cessive distortion of the normally circular pupil configuration.
These problems, when existent, occur to their greatest extent during pupil contraction, e~g. in response to bright light or artificially induced situations.
Accordingly, an object of the present invention is to overcome the aforesaid and corollary drawbacks of intraocular lens-supporting systems which can accommodate to normal dynamic pupil function and to accomplish this without danger of displace-ment of the pseudophakos after proper implantation.
It is also an object of the invention to render possible the placement of pseudophakoi in either the anterior chamber of an aphakic eye or the more natural lens position posteriorly of the iris diaphragm; and A more general object is to provide for improvement in structure, function and applicability to the aphakic eye of pseudophakoi which can accommodate to dilation and contraction - of the dynamic pupil.
Other objects and advantages of the invention will become more readily apparent from the following summary of the ~0 invention and description of the preferred embodiments.
SUMMARY OF THE INVENTION
The invention provides an intraocular lens and lens-supporting system which can be readily arranged to permit implan-tation either in the anterior or the posterior cham~er of an aphakic eye. In the latter situation, implantation immediately behind the iris diaphragm places the artificial lens in approxi-mately the location of the extraction so that danger of corneal damage by the pseudophakos can be minimized, if not eliminated.
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Provision for fixing the pseudophakos with its lens in the anterior chamber is, however, contemplated for situations where it may be desirable or preferable to do so~
The lens-supporting (haptic) section of the pseudo-phakos comprises a plurality of flexible spring-like members designed to follow the margin of the dynamic pupil while, at the same time, providing longitudinal fixation and centration of the lens.
Each spring-like follower mem~er is anchored adjacent the periphery of the lens and extends ther~from a substantial distance laterally into a looped configuration back to a position forwardly of one of the lens surfaces whereupon it is terminated with a U-shaped clip into which the irido-pupillary margin may be fitted.
Each spring-like follower is preformed so that in a relaxed (not under spring tension) conditions its U-shaped clip is located a radial distance from the center of the lens approxi-mately equal to the radial dimension of the pupil margin of an eye which is dilated to or approximately to the maximum size possible without artifical stimulation. Thus, under conditions of normal maximum pupil dilation, the U-shaped clips apply negligible or no force at all against the pupil margin while during pupil contraction the force against the pupil margin at each point of contact of the U-shaped clips is minimal but sufficient to maintain accurate lens centration in the eye.
This avoids traumatization of the iris and prevents excessive distortion of the pupil shape during contraction and dilation. -The looped lateral extensions of the pupil follower members and their U-Shaped clips prevent accidental disconnection and/or forward or rearward displacement of the pseudophakos when ph~
.. . : ' ~, , ' .
:: . , : ' ' ' it becomes necessary to medically induce pupil dilation beyond normal limits for intraocular examination.
Details of the invention will become more readily apparent from the following description when taken in conjunction with the accompanying drawings.
IN THE DR~WINGS
Fig. 1 is an illustration, in side elevation, of a preferred embodiment of a pseudophakos in situ, the eye being shown in cross-section for clarity of illustration;
Fig. 2 is a front elevational view of the pseudophakos of Fig. l;
Fig. 3 is a front elevational view of the iris of the eye of Fig. 1 taken generally from the position of line 3-3 and illustrating a condition where the iris, with the pseudophakos in situ, is dilated to maximum normal pupil diameter;
Fig. 4 is a view similar to Fig. 3 but illustrating a conditiQn of substantially minimum pupil dilation (maximum contraction);
Fig. 5 is a view similar to Fig. 1 but illustrating, in cross-section, a modification of the invention; and Fig. 6 is a front elevational view of the modified pseudophakos of Fig. 5.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring more particularly to Figs. 1-4, pseudophakos 10 comprises an optical section (lens 12) and a fastening or haptic section (lens-supporting arms 14).
Lens 12 is formed of a material which is biologically inert, i.e. not susceptible to being absorbed by body fluids :
ph~
and capable of bein~ well tolerated by the human body when implanted. Exemplary materials are quartz, ophthalmic glass, methylmethacrylate resins such as those available under the trade marks t'Lucite" and "Plexiglass" and biologically neutral, chemically pure polymethylmethacrylates or biologically inert polymeric materials.
Supporting arms 14 are, for similar reasons of avoiding irritation and/or human body rejection of its components, formed of a biologically inert material such as platinum, titanium or an extruded polyamide such as nylon.
The supporting arms 14 and their equivalents in modifications of the invention will be described hereinafter as being formed of "wire", it being understood that the term "wire"
as used in this specification and its appendant claims is in-tended to include strands, strips or rods of biologically inert material whether such material is metallic or plastic and/or whether one or the other is used exclusively throughout the system of arms 14 or the system is made up of both.
Lens 12 is provided with a plurality, preferably at least three, e~ually radially and circumferentially spaced chordal openings 16 which may be extended completely through or partially into the lens material as illustrated.
Extended into openings 16 and permanently anchored thereinplace are proximal ends 18 of arms 14. Ends 18 of arms 14 may be force fitted or cemented in openings 16 or ends 18 may be terminated with a bead or be otherwise headed so as to provide added anchoring stability. By such means, a displacement of lens material therearound, e.g. by cold flow or with an appli~
cation of heat and/or ultrasonic vibration will prevent withdrawal ph~
. .
' ,.
, ~t~
and turning of arms 14 in openings 16.
The material selected for arms 14, e.g. from one or more of the aforementioned metals or plastics, is preselected so as to be characteristically spring-like and capable of returning to a preformed configuration or shape when deformed by bending therefrom. Each arm is so preshaped that in its relaxed condition (i.e. not under bending force) it extends from openings 16 a substantial distance laterally away from the edge of lens 12 to a bight 20 wherewith it is looped reversely toward lens 12 in a direction tending toward the anterior sur-face of the lens and terminating forwardly of the lens. It is further placed under tension toward the forward surface of the lens to prevent undue axial movement of the lens away from its free end in use of the pseudophakos 10.
At the free end of each arm 14 it is formed into the configuration of a U-shaped clip 22 having a relatively long - strut-like portion 24 which is smoothly rounded or beaded at its end. Clip 22, in each case, is shaped to accept the marginal portion of the iris 26 of an eye 28 intended to receive pseudo-phakos 10 substantially in the manner illustrated in Fig. 1.
In this embodiment of the invention, pseudophakos 10 is positioned posteriorly of iris 26, i.e. approximately at or adjacent to the position originally assum~d by the extracted human lens, and clips 22 are fitted over the pupil margin with strut portions 24 thereof extending radially over the anterior surface of iris 26 (Figs. 1, 3 and 4).
It should be understood that lens 12 may be placed in the anterior chamber of eye 28 (i.e. forwardly of iris 26) by simply reversing its position in the eye so that strut portions 3024 of clips 22 .
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.
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. ' , ~ ' . ' ~C~ 4(~ 9 ~
are caused to extend posteriorly of iris diaphragm 26.
A special feature of the present invention which avoids excessive force against and traumatization of the pupil margin of iris diaphragm 26 and/or excessive pupil shape distortion, is best illustrated in Figs. 3 and 4.
Pupil P is illustrated in Fig. 3 as being dilated to a maximum normal diameter wherein, with clip portions 22 of arms 14 fastened over the pupillary margin of iris diaphragm 26, arms 14 are in their relaxed condition (not under bending tension).
In other words, arms 14 are in positions corresponding to those depicted in Fig. 2 before implantation. Lens 12 is thereby automatically centered in pupil P and held against axial dis-placement by laterally extending portions of arms 14 adjacent bights 20 and by strut portions 24. Bights 20 prevent forward displacement and struts 24 prevent rearward displacement while the aforesaid tension in arms 14 urging them toward the lens surface further avoids tendency for rearward axial displacement of the lens. At the same time and with pupil P at maximum normal dilation as shown, minimal or no force at all is applied to the pupillary margin of iris diaphragm 26. If desired however, artificial or medically induced dilation to the extent of enlarging pupil P to a size diagrammatically illustrated by dot-dash ouline P', or slightly greater, may be effected for purposes of intraocular examination ~ithout danger of axial displacement of pseudophakos 10; bights 20 and struts 24 still preventing such displacement.
By affording negligible or no holding force at all against the margin of pupil P at normal maximum dilation as illustrated in Fig. 3, it can be seen that the flexing of bmkfl,~
- . ~
- . ~ , - , : :
. :: , ... : :
s^~
arms 14 by contraction of pupil P to the maximum extent normally encountered will effect only slight, non-irritating and substan-tially non-distorting force against the pupil margin. The long and slender extensions of arms 14 from respective clip portions 22 to points of entry in anchoring openings 16 provide only a gentle pupil following force at the iris margin which maintains a constant centering of lens 12 in pupil P with struts 24 and bights 20 preventing accidental axial displacement of the pseudophakos in eye 28.
It should be understood that the actual force applied by clips 22 against iris diaphragm 26, i.e. the margin of pupil P, during pupil contraction from the maximum condition of normal dilation (Fig. 3) to minimum dilation (Fig. 4) can be preset to desired values by selection of the materials and diametral sizes used for wires making up arms 14. A material and wire size use-ful according to the invention is titanium of from 0.1 mm to 0.5 mm in diameter and having an extension between a clip 22 and its point of entry into lens 12 of approximately 7mm.
In Figs. 5 and 6 there is shown a modification of the invention wherein a plano-convex lens 12' is provided with supporting arms 14' ôf substantially identical configuration and positioning upon lens 12' as are arms 14 of lens 12. In the present case, however, clip portions 22' are disposed immediately rearwardly of lens 12' adjacent its flat posterior surface. While not shown, it should be understood that arms 14' may be directed forwardly of lens 12' with clips 22' located adjacent to its convex surface if it is desired to implant lens 12' behind iris 26'. Clips 22' in such a case would be reversed by bending so that strut portions 24' thereof would be foremost, e.g. as in pseudophakos 10 of Figs. 1-4.
bmrrt ~ ~ 9~
' ~ ' - '~ : , .' . ~ . . . . . .
: . , - . . .
. - ~. ~ . . . :
This invention relates to improvements in ophthalmo-logy and more particularly to supporting systems for artificial intraocular lenses (pseudophakoi) used for the correction of aphakia and re-establishment of binocularity in aphakia.
Disc~ssion of the Prior Art:
Well-fixed and well-center~d intraocular lens implants are known to produce stable retinal images and offer the best chance of re-establishment of binocularity in cases of aphakia.
A characteristic common to presently employed lenses which thwarts the normal activity of the aphakic eye's pupil, however, is the maintenance of a constant minimal pupil size as determined by the radial spacing of posterior projections of -non-yielding post-irido loops or clips. A pilocarpine regimen is usually necessary to avoid accidental lens dislocation occurring as a result of pupil dilation.
Supporting systems which can accommodate for normal dilation and contraction of a dynamic pupil have been made the subject of applicant's U.S. Patent No. 3,975,779, issued August 24, 1976.
These latter systems, having been designed to apply a constant holding force against the pupil margin under maximum normal dilation and beyond (i.e. medically induced abnormal dilation) for purposes of avoiding axial displacement of the pseudophakos, have a disadvantage of tending, in some applica-tions of use, to traumatize the pupil margin and/or produce ex-..
ph: :
: : : . , ............ , ': ' ' ' ' '~ ':
- . : .. : , ::
cessive distortion of the normally circular pupil configuration.
These problems, when existent, occur to their greatest extent during pupil contraction, e~g. in response to bright light or artificially induced situations.
Accordingly, an object of the present invention is to overcome the aforesaid and corollary drawbacks of intraocular lens-supporting systems which can accommodate to normal dynamic pupil function and to accomplish this without danger of displace-ment of the pseudophakos after proper implantation.
It is also an object of the invention to render possible the placement of pseudophakoi in either the anterior chamber of an aphakic eye or the more natural lens position posteriorly of the iris diaphragm; and A more general object is to provide for improvement in structure, function and applicability to the aphakic eye of pseudophakoi which can accommodate to dilation and contraction - of the dynamic pupil.
Other objects and advantages of the invention will become more readily apparent from the following summary of the ~0 invention and description of the preferred embodiments.
SUMMARY OF THE INVENTION
The invention provides an intraocular lens and lens-supporting system which can be readily arranged to permit implan-tation either in the anterior or the posterior cham~er of an aphakic eye. In the latter situation, implantation immediately behind the iris diaphragm places the artificial lens in approxi-mately the location of the extraction so that danger of corneal damage by the pseudophakos can be minimized, if not eliminated.
ph~J~
- . . . . . . . . .
-, : - ":
.. ' .' ~ '. ~, ' ' "': :
.
'-: ~ , : , ~ (~7 ~
Provision for fixing the pseudophakos with its lens in the anterior chamber is, however, contemplated for situations where it may be desirable or preferable to do so~
The lens-supporting (haptic) section of the pseudo-phakos comprises a plurality of flexible spring-like members designed to follow the margin of the dynamic pupil while, at the same time, providing longitudinal fixation and centration of the lens.
Each spring-like follower mem~er is anchored adjacent the periphery of the lens and extends ther~from a substantial distance laterally into a looped configuration back to a position forwardly of one of the lens surfaces whereupon it is terminated with a U-shaped clip into which the irido-pupillary margin may be fitted.
Each spring-like follower is preformed so that in a relaxed (not under spring tension) conditions its U-shaped clip is located a radial distance from the center of the lens approxi-mately equal to the radial dimension of the pupil margin of an eye which is dilated to or approximately to the maximum size possible without artifical stimulation. Thus, under conditions of normal maximum pupil dilation, the U-shaped clips apply negligible or no force at all against the pupil margin while during pupil contraction the force against the pupil margin at each point of contact of the U-shaped clips is minimal but sufficient to maintain accurate lens centration in the eye.
This avoids traumatization of the iris and prevents excessive distortion of the pupil shape during contraction and dilation. -The looped lateral extensions of the pupil follower members and their U-Shaped clips prevent accidental disconnection and/or forward or rearward displacement of the pseudophakos when ph~
.. . : ' ~, , ' .
:: . , : ' ' ' it becomes necessary to medically induce pupil dilation beyond normal limits for intraocular examination.
Details of the invention will become more readily apparent from the following description when taken in conjunction with the accompanying drawings.
IN THE DR~WINGS
Fig. 1 is an illustration, in side elevation, of a preferred embodiment of a pseudophakos in situ, the eye being shown in cross-section for clarity of illustration;
Fig. 2 is a front elevational view of the pseudophakos of Fig. l;
Fig. 3 is a front elevational view of the iris of the eye of Fig. 1 taken generally from the position of line 3-3 and illustrating a condition where the iris, with the pseudophakos in situ, is dilated to maximum normal pupil diameter;
Fig. 4 is a view similar to Fig. 3 but illustrating a conditiQn of substantially minimum pupil dilation (maximum contraction);
Fig. 5 is a view similar to Fig. 1 but illustrating, in cross-section, a modification of the invention; and Fig. 6 is a front elevational view of the modified pseudophakos of Fig. 5.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring more particularly to Figs. 1-4, pseudophakos 10 comprises an optical section (lens 12) and a fastening or haptic section (lens-supporting arms 14).
Lens 12 is formed of a material which is biologically inert, i.e. not susceptible to being absorbed by body fluids :
ph~
and capable of bein~ well tolerated by the human body when implanted. Exemplary materials are quartz, ophthalmic glass, methylmethacrylate resins such as those available under the trade marks t'Lucite" and "Plexiglass" and biologically neutral, chemically pure polymethylmethacrylates or biologically inert polymeric materials.
Supporting arms 14 are, for similar reasons of avoiding irritation and/or human body rejection of its components, formed of a biologically inert material such as platinum, titanium or an extruded polyamide such as nylon.
The supporting arms 14 and their equivalents in modifications of the invention will be described hereinafter as being formed of "wire", it being understood that the term "wire"
as used in this specification and its appendant claims is in-tended to include strands, strips or rods of biologically inert material whether such material is metallic or plastic and/or whether one or the other is used exclusively throughout the system of arms 14 or the system is made up of both.
Lens 12 is provided with a plurality, preferably at least three, e~ually radially and circumferentially spaced chordal openings 16 which may be extended completely through or partially into the lens material as illustrated.
Extended into openings 16 and permanently anchored thereinplace are proximal ends 18 of arms 14. Ends 18 of arms 14 may be force fitted or cemented in openings 16 or ends 18 may be terminated with a bead or be otherwise headed so as to provide added anchoring stability. By such means, a displacement of lens material therearound, e.g. by cold flow or with an appli~
cation of heat and/or ultrasonic vibration will prevent withdrawal ph~
. .
' ,.
, ~t~
and turning of arms 14 in openings 16.
The material selected for arms 14, e.g. from one or more of the aforementioned metals or plastics, is preselected so as to be characteristically spring-like and capable of returning to a preformed configuration or shape when deformed by bending therefrom. Each arm is so preshaped that in its relaxed condition (i.e. not under bending force) it extends from openings 16 a substantial distance laterally away from the edge of lens 12 to a bight 20 wherewith it is looped reversely toward lens 12 in a direction tending toward the anterior sur-face of the lens and terminating forwardly of the lens. It is further placed under tension toward the forward surface of the lens to prevent undue axial movement of the lens away from its free end in use of the pseudophakos 10.
At the free end of each arm 14 it is formed into the configuration of a U-shaped clip 22 having a relatively long - strut-like portion 24 which is smoothly rounded or beaded at its end. Clip 22, in each case, is shaped to accept the marginal portion of the iris 26 of an eye 28 intended to receive pseudo-phakos 10 substantially in the manner illustrated in Fig. 1.
In this embodiment of the invention, pseudophakos 10 is positioned posteriorly of iris 26, i.e. approximately at or adjacent to the position originally assum~d by the extracted human lens, and clips 22 are fitted over the pupil margin with strut portions 24 thereof extending radially over the anterior surface of iris 26 (Figs. 1, 3 and 4).
It should be understood that lens 12 may be placed in the anterior chamber of eye 28 (i.e. forwardly of iris 26) by simply reversing its position in the eye so that strut portions 3024 of clips 22 .
bm/
. ' .~ :
.
:1,', ,::
. ' , ~ ' . ' ~C~ 4(~ 9 ~
are caused to extend posteriorly of iris diaphragm 26.
A special feature of the present invention which avoids excessive force against and traumatization of the pupil margin of iris diaphragm 26 and/or excessive pupil shape distortion, is best illustrated in Figs. 3 and 4.
Pupil P is illustrated in Fig. 3 as being dilated to a maximum normal diameter wherein, with clip portions 22 of arms 14 fastened over the pupillary margin of iris diaphragm 26, arms 14 are in their relaxed condition (not under bending tension).
In other words, arms 14 are in positions corresponding to those depicted in Fig. 2 before implantation. Lens 12 is thereby automatically centered in pupil P and held against axial dis-placement by laterally extending portions of arms 14 adjacent bights 20 and by strut portions 24. Bights 20 prevent forward displacement and struts 24 prevent rearward displacement while the aforesaid tension in arms 14 urging them toward the lens surface further avoids tendency for rearward axial displacement of the lens. At the same time and with pupil P at maximum normal dilation as shown, minimal or no force at all is applied to the pupillary margin of iris diaphragm 26. If desired however, artificial or medically induced dilation to the extent of enlarging pupil P to a size diagrammatically illustrated by dot-dash ouline P', or slightly greater, may be effected for purposes of intraocular examination ~ithout danger of axial displacement of pseudophakos 10; bights 20 and struts 24 still preventing such displacement.
By affording negligible or no holding force at all against the margin of pupil P at normal maximum dilation as illustrated in Fig. 3, it can be seen that the flexing of bmkfl,~
- . ~
- . ~ , - , : :
. :: , ... : :
s^~
arms 14 by contraction of pupil P to the maximum extent normally encountered will effect only slight, non-irritating and substan-tially non-distorting force against the pupil margin. The long and slender extensions of arms 14 from respective clip portions 22 to points of entry in anchoring openings 16 provide only a gentle pupil following force at the iris margin which maintains a constant centering of lens 12 in pupil P with struts 24 and bights 20 preventing accidental axial displacement of the pseudophakos in eye 28.
It should be understood that the actual force applied by clips 22 against iris diaphragm 26, i.e. the margin of pupil P, during pupil contraction from the maximum condition of normal dilation (Fig. 3) to minimum dilation (Fig. 4) can be preset to desired values by selection of the materials and diametral sizes used for wires making up arms 14. A material and wire size use-ful according to the invention is titanium of from 0.1 mm to 0.5 mm in diameter and having an extension between a clip 22 and its point of entry into lens 12 of approximately 7mm.
In Figs. 5 and 6 there is shown a modification of the invention wherein a plano-convex lens 12' is provided with supporting arms 14' ôf substantially identical configuration and positioning upon lens 12' as are arms 14 of lens 12. In the present case, however, clip portions 22' are disposed immediately rearwardly of lens 12' adjacent its flat posterior surface. While not shown, it should be understood that arms 14' may be directed forwardly of lens 12' with clips 22' located adjacent to its convex surface if it is desired to implant lens 12' behind iris 26'. Clips 22' in such a case would be reversed by bending so that strut portions 24' thereof would be foremost, e.g. as in pseudophakos 10 of Figs. 1-4.
bmrrt ~ ~ 9~
' ~ ' - '~ : , .' . ~ . . . . . .
: . , - . . .
. - ~. ~ . . . :
Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A pseudophakos comprising:
a lens having oppositely disposed anterior and posterior optically finished side surfaces;
a plurality of slender and resilient supporting arms affixed to said lens adjacent its periphery, said arms each being of a looped configuration including a bight disposed a substantial distance laterally away from said periphery of said lens and a free end positioned adjacent one of said side surfaces of said lens when said arm is in a relaxed condition;
said free end of said arm being in the configuration of a clip for receiving the irido-pupillary margin of an eye when the pseudophakos is implanted for use and wherewith said lens may be centered relative to the pupil, each free end of each arm when in said relaxed condition being approximately equally radially spaced from the center of said lens an amount approximately corresponding to the radial dimension of said pupil when said pupil is at approximately maximum normal dilation whereby under such condition of pupil dilation said clips do not apply appreciable force against said pupil margin while at maximum pupil contraction only minimal gentle holding force is applied.
a lens having oppositely disposed anterior and posterior optically finished side surfaces;
a plurality of slender and resilient supporting arms affixed to said lens adjacent its periphery, said arms each being of a looped configuration including a bight disposed a substantial distance laterally away from said periphery of said lens and a free end positioned adjacent one of said side surfaces of said lens when said arm is in a relaxed condition;
said free end of said arm being in the configuration of a clip for receiving the irido-pupillary margin of an eye when the pseudophakos is implanted for use and wherewith said lens may be centered relative to the pupil, each free end of each arm when in said relaxed condition being approximately equally radially spaced from the center of said lens an amount approximately corresponding to the radial dimension of said pupil when said pupil is at approximately maximum normal dilation whereby under such condition of pupil dilation said clips do not apply appreciable force against said pupil margin while at maximum pupil contraction only minimal gentle holding force is applied.
2. A pseudophakos according to claim 1 wherein each of said clips is terminated with a laterally directed strut portion of substantial length, said strut portion and said bight of a corresponding one of said arms being intended for disposition one forwardly of and one rearwardly of the iris of an eye receiving said pseudophakos for preventing accidental axial displacement of said pseudophakos during use thereof.
3. A pseudophakos according to claim 2 wherein the lateral extensions of said strut portions and of said bights from a point centrally of said lens are greater then the maximum radial dimension of pupil dilation normally used in artificial stimulation situations for intraocular examination purposes.
4. A pseudophakos according to claim 1 wherein said anterior and posterior lens surfaces are convexly curved and said pseudophakos is reversible for fixation in either the posterior or anterior chambers of the eye.
5. A pseudophakos according to claim 1 wherein one of said sides of said lens is plano and the other side is convexly curved.
6. A pseudophakos according to claim 5 wherein said free end of each of said clips is positioned adjacent said convexly curved side of said lens.
7. A pseudophakos according to claim 5 wherein said free end of each of said clips is positioned adjacent said plano side of said lens.
8. A pseudophakos according to claim 1 wherein said lens is formed of glass.
9. A pseudophakos according to claim 1 wherein said lens is formed of a plastic material.
10. A pseudophakos according to claim 1 wherein said arms are affixed in openings extending into said lens adjacent its periphery.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/674,348 US4014049A (en) | 1976-04-07 | 1976-04-07 | Artificial intraocular lens and supporting system therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1074054A true CA1074054A (en) | 1980-03-25 |
Family
ID=24706237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA265,798A Expired CA1074054A (en) | 1976-04-07 | 1976-11-16 | Artificial intraocular lens and supporting system therefor |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4014049A (en) |
| JP (1) | JPS52123593A (en) |
| CA (1) | CA1074054A (en) |
| DE (1) | DE2652765A1 (en) |
| FR (1) | FR2347029A1 (en) |
| GB (1) | GB1545252A (en) |
| NL (1) | NL7613306A (en) |
Families Citing this family (61)
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| US4159546A (en) * | 1977-06-15 | 1979-07-03 | Shearing Steven P | Intraocular lens |
| USRE31626E (en) * | 1978-12-01 | 1984-07-10 | Intraocular lens | |
| US4244060A (en) * | 1978-12-01 | 1981-01-13 | Hoffer Kenneth J | Intraocular lens |
| US4285072A (en) * | 1979-05-14 | 1981-08-25 | Harry H. Leveen | Anterior-posterior intraocular lens |
| US4328595A (en) * | 1979-08-30 | 1982-05-11 | Sheets John H | Intraocular lens |
| US4473910A (en) * | 1980-01-21 | 1984-10-02 | Minnesota Mining And Manufacturing Company | Intraocular lens |
| CA1165056A (en) * | 1980-01-21 | 1984-04-10 | William H. Grinder | Intraocular lens |
| FR2487192A1 (en) * | 1980-07-28 | 1982-01-29 | Rainin Edgar | Intra-ocular lens unit - has protrusion with portion movable in guide in relation to it |
| US4366582A (en) * | 1980-12-01 | 1983-01-04 | Faulkner Gerald D | Posterior chamber intraocular lens |
| US4601720A (en) * | 1981-02-24 | 1986-07-22 | Sinskey Robert M | Intraocular lens assembly |
| IT8135872V0 (en) * | 1981-06-18 | 1981-06-18 | Maggi Carlo | INTRAOCULAR LENS |
| US4403353A (en) * | 1981-06-25 | 1983-09-13 | Tennant Jerald L | Anterior chamber implant lens |
| US4446581A (en) * | 1981-09-02 | 1984-05-08 | Blake L W | Intraocular lens with free-ended sizing prong |
| US4442553A (en) * | 1981-09-17 | 1984-04-17 | Hessburg Philip C | Intraocular lens |
| US4441217A (en) * | 1981-12-21 | 1984-04-10 | Cozean Jr Charles H | Intraocular lenses |
| US4787902A (en) * | 1982-04-01 | 1988-11-29 | Sheets John H | Multi-positionable intraocular lens |
| US4578078A (en) * | 1982-04-02 | 1986-03-25 | Minnesota Mining And Manufacturing Company | Intraocular lens with asymetric vaulted support loops |
| EP0125297A1 (en) * | 1982-11-08 | 1984-11-21 | LESTER, Jess C. | Open loop with gripping area for intraocular lens |
| US4479802A (en) * | 1983-02-16 | 1984-10-30 | Anis Aziz Y | Irrigating vectis |
| US4562599A (en) * | 1983-06-02 | 1986-01-07 | Minnesota Mining And Manufacturing Company | Intraocular lens |
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| US4527294A (en) * | 1983-12-16 | 1985-07-09 | Heslin K B | Intraocular lens construction |
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| US5766244A (en) * | 1991-05-23 | 1998-06-16 | Binder; Helmut | Intraocular artificial lens and method for fabricating same |
| JPH0748120Y2 (en) * | 1991-09-06 | 1995-11-08 | パラマウントベッド株式会社 | Bottom structure in bed |
| US20060238702A1 (en) | 1999-04-30 | 2006-10-26 | Advanced Medical Optics, Inc. | Ophthalmic lens combinations |
| US20030060881A1 (en) * | 1999-04-30 | 2003-03-27 | Advanced Medical Optics, Inc. | Intraocular lens combinations |
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| US20020072796A1 (en) * | 2000-12-11 | 2002-06-13 | Hoffmann Laurent G. | Iris fixated intraocular lenses |
| US20120016349A1 (en) | 2001-01-29 | 2012-01-19 | Amo Development, Llc. | Hybrid ophthalmic interface apparatus and method of interfacing a surgical laser with an eye |
| US6443985B1 (en) | 2001-08-27 | 2002-09-03 | Randall Woods | Intraocular lens implant having eye accommodating capabilities |
| US7150759B2 (en) * | 2002-01-14 | 2006-12-19 | Advanced Medical Optics, Inc. | Multi-mechanistic accommodating intraocular lenses |
| US7763069B2 (en) | 2002-01-14 | 2010-07-27 | Abbott Medical Optics Inc. | Accommodating intraocular lens with outer support structure |
| US7198539B2 (en) * | 2002-10-21 | 2007-04-03 | Lam Fredericka D | Artificial eye for doll or the like |
| US20040082995A1 (en) * | 2002-10-25 | 2004-04-29 | Randall Woods | Telescopic intraocular lens implant for treating age-related macular degeneration |
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| US20040082993A1 (en) | 2002-10-25 | 2004-04-29 | Randall Woods | Capsular intraocular lens implant having a refractive liquid therein |
| US7662180B2 (en) | 2002-12-05 | 2010-02-16 | Abbott Medical Optics Inc. | Accommodating intraocular lens and method of manufacture thereof |
| US20050131535A1 (en) * | 2003-12-15 | 2005-06-16 | Randall Woods | Intraocular lens implant having posterior bendable optic |
| US20070032868A1 (en) * | 2005-08-08 | 2007-02-08 | Randall Woods | Capsular shape-restoring device |
| US9636213B2 (en) * | 2005-09-30 | 2017-05-02 | Abbott Medical Optics Inc. | Deformable intraocular lenses and lens systems |
| US8377125B2 (en) | 2006-04-05 | 2013-02-19 | Anew Optics, Inc. | Intraocular lens with accommodation |
| US8048156B2 (en) | 2006-12-29 | 2011-11-01 | Abbott Medical Optics Inc. | Multifocal accommodating intraocular lens |
| US20080161914A1 (en) * | 2006-12-29 | 2008-07-03 | Advanced Medical Optics, Inc. | Pre-stressed haptic for accommodating intraocular lens |
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| US8480734B2 (en) | 2007-12-27 | 2013-07-09 | Anew Optics, Inc. | Intraocular lens with accommodation |
| US8034108B2 (en) | 2008-03-28 | 2011-10-11 | Abbott Medical Optics Inc. | Intraocular lens having a haptic that includes a cap |
| EP2361060A4 (en) | 2008-11-26 | 2014-02-26 | Anew Optics Inc | Haptic devices for intraocular lens |
| US20100131059A1 (en) * | 2008-11-26 | 2010-05-27 | Anew Optics, Inc. | Intraocular lens optic |
| US10010405B2 (en) | 2008-11-26 | 2018-07-03 | Anew Aol Technologies, Inc. | Haptic devices for intraocular lens |
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| US8343217B2 (en) | 2009-08-03 | 2013-01-01 | Abbott Medical Optics Inc. | Intraocular lens and methods for providing accommodative vision |
| US20110191086A1 (en) * | 2010-02-04 | 2011-08-04 | Anew Optics, Inc. | Model of accommodative intraocular lens |
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| US9084674B2 (en) | 2012-05-02 | 2015-07-21 | Abbott Medical Optics Inc. | Intraocular lens with shape changing capability to provide enhanced accomodation and visual acuity |
| US9364318B2 (en) * | 2012-05-10 | 2016-06-14 | Z Lens, Llc | Accommodative-disaccommodative intraocular lens |
| US20140316520A1 (en) * | 2013-04-19 | 2014-10-23 | Accutome, Inc. | Support segment for ocular structures |
| GB201314428D0 (en) | 2013-08-12 | 2013-09-25 | Qureshi M A | Intraocular lens system and method |
| EP3681438A1 (en) | 2017-09-11 | 2020-07-22 | AMO Groningen B.V. | Methods and apparatuses to increase intraocular lenses positional stability |
| US11759309B2 (en) | 2020-04-29 | 2023-09-19 | Long Bridge Medical, Inc. | Devices to support and position an intraocular lens within the eye and methods of use |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1034325B (en) * | 1955-05-02 | 1958-07-17 | Dr Med Helmut Dannheim | Artificial lens |
| DE2000704A1 (en) * | 1970-01-08 | 1971-08-12 | Mo Med Stomatologitscheskij I | Artificial lens |
| US3673616A (en) * | 1970-01-16 | 1972-07-04 | Svyatoslav Nikolaevich Fedorov | Artificial anterior chamber lens |
| US3906551A (en) * | 1974-02-08 | 1975-09-23 | Klaas Otter | Artificial intra-ocular lens system |
| US3866249A (en) * | 1974-03-07 | 1975-02-18 | Leonard Flom | Posterior chamber artificial intraocular lens |
| US3913148A (en) * | 1974-12-26 | 1975-10-21 | Ernst W Potthast | Intraocular lens apparatus |
| US3971073A (en) * | 1975-04-09 | 1976-07-27 | American Optical Corporation | Artificial intraocular lens |
| DE2639419C2 (en) * | 1975-09-22 | 1986-04-17 | AO Inc., Southbridge, Mass. | Artificial intraocular lens and method of making |
-
1976
- 1976-04-07 US US05/674,348 patent/US4014049A/en not_active Expired - Lifetime
- 1976-11-16 DE DE19762652765 patent/DE2652765A1/en active Granted
- 1976-11-16 CA CA265,798A patent/CA1074054A/en not_active Expired
- 1976-11-19 GB GB48475/76A patent/GB1545252A/en not_active Expired
- 1976-11-30 NL NL7613306A patent/NL7613306A/en not_active Application Discontinuation
- 1976-12-08 JP JP14668076A patent/JPS52123593A/en active Pending
- 1976-12-10 FR FR7637211A patent/FR2347029A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52123593A (en) | 1977-10-17 |
| DE2652765C2 (en) | 1987-01-29 |
| DE2652765A1 (en) | 1977-10-27 |
| FR2347029B1 (en) | 1980-10-17 |
| US4014049A (en) | 1977-03-29 |
| GB1545252A (en) | 1979-05-02 |
| FR2347029A1 (en) | 1977-11-04 |
| NL7613306A (en) | 1977-10-11 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |