|Publication number||US3913148 A|
|Publication date||21 Oct 1975|
|Filing date||26 Dec 1974|
|Priority date||26 Dec 1974|
|Publication number||US 3913148 A, US 3913148A, US-A-3913148, US3913148 A, US3913148A|
|Inventors||Potthast Ernst W|
|Original Assignee||Potthast Ernst W|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (2), Referenced by (78), Classifications (9)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent [o1 Pottliast [4 Oct. 21, 1975 INTRAOCULAR LENS APPARATUS  Inventor: Ernst W. Potthast, 900 Beach Park Blvd., Apt. 150, Foster City, Calif. 94404  Filed: Dec. 26, 1974  Appl. No.: 536,358
 US. Cl 3/13; 128/303 R  Int. Cl. A61F 1/16; A61F l/24; A61F 9/00  Field of Search 3/13, 1; 128/303 R;
 References Cited UNITED STATES PATENTS Fedorov et al 3/13  ABSTRACT An intraocular lens apparatus for insertion into a posterior chamber adjacent the iris of an eye. The apparatus includes a lens having a front face, a central portion and an outer periphery and a plurality of cantilevered clips. Each clip is mounted to the central portion, extends outwardly from the face and toward the periphery. The clips are adapted to secure the iris to the front face of the lens when the lens is positioned within the posterior chamber of the eye immediately behind the iris. A surgical tool includes a handle portion and a foot portion having a clip retaining surface which serves to maintain the lens on the tool when the lens is being positioned in the posterior of the eye. In one embodiment the clips are comprised of a resilient springy material which serves to bias the legs toward the face. In an alternate embodiment, the clips are comprised of a deformable, malleable material.
16 Claims, 9 Drawing Figures US. Patent Oct. 21, 1975 Sheet10f2- 3,913,148
Sheet 2 .of 2
US. Patent Oct. 21; 1975 1 INTRAOCULAR LENS APPARATUS BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to introcular lens apparatus and, more particularly to intraocular lens apparauts including a lens having a plurality of clips mounted thereto for securing the lens to the iris of an eye, and a surgical tool which may be released from the lens when the lens is inserted into the posterior chamber.
2. Description of the Prior Art For several years intraocular lenses, or artificial lenses, have been implanted by eye surgeons in the eyes of patients who have had cataracts removed. Historically, the first implants were large and had projections that tended to mechanically contact, and thus irritate the iris and ciliary body within the interior of the eye. More recent lenses have been made smaller to avoid mechanical contact with the interior walls of the eye.
An example of one of the newer lenses is a lens known as the Medallion lens. The Medallion lens has an aperture formed near its outer edge for receiving a suture therethrough. The lens is positioned in the anterior chamber of the eye and then sutured to the iris with a single suture. Eye operations involving Medallion lenses are relatively difficult since the suture must be brought through the posterior chamber of the eye before the lens can be secured to the iris. In addition, as is the case with most lenses that are inserted into the anterior chamber, should the lens become displaced and touch the endothelium inside the cornea of the eye, edema may be caused. Moreover, the lens is subject to rotational displacement about the single suture.
Another artificial lens is a lens known as the Binkhorst-Federov lens which includes a pair of nylon double loops formed in the shape of a cross. When inserting the lens into the anterior chamber of the eye, one double loop is disposed behind the iris and the other disposed in front of the iris. The lens is held in place by the constriction of the pupil. Thus, the patient is required to take myotic eye drops daily to maintain the lens in position. Generally, the drops are not a problem for older patients who are usually taking medications of one sort or another, but serve as a hindrance to younger patients. In addition, should the pupils dialate, the lens can subluxate and require reinsertion.
Still another example of an artificial lens is a lens having an X-shape, which similarly to the Binkhoist- Federov lens, has one set of opposite legs which fits over the iris and another set of opposite legs which fits under the iris such that the lens may be inserted into the plane of the iris. However, since the legs are not secured to the iris, this lens is also subject to dislocation upon dilation of the pupils.
SUMMARY OF THE PRESENT INVENTION It is therefore an object of the present invention to provide an intraocular lens which is inserted into the posterior chamber of an eye and secured to the iris with clips.
Still another object of the present invention is to provide an intraocular lens having a front face and an outer periphery with a plurality of clips extending outwardly from the face and toward the periphery. for securing the lens to the iris of the eye when the lens is inserted into the posterior chamber.
Still another object of the present invention is to provide in combination with the intraocular lens, a surgical tool to facilitate insertion of the lens into the posterior chamber and which may be easily released from the lens after insertion.
Briefly, the present invention is directed to an intraocular lens apparatus for inserting a lens into the posterior chamber adjacent the iris of an eye. The apparatus includes in combination a lens and a surgical tool for carrying the lens. The lens has a front face, a central portion, and an outer periphery and a plurality of cantilevered clips. Each clip is mounted to the central portion and extends outwardly from the face and toward the periphery. The clips are movable from an irisreceiving position to an iris-engaging position. The surgical tool has a handle portion and a foot portion with a face engaging surface for engaging the front face and a clip retaining surface for attaching the lens to the tool and for retaining the clips spaced from the face when the clip is in the iris-receiving position. When the clips are disposed on the retaining surface, the lens is secured to the tool. After the lens is selectively positioned in the posterior of the eye the clips are moved from the iris-receiving position to the iris-engaging position which detaches the lens from the tool and secures it to the iris. In a first embodiment the clips are comprised of a resilient material which serves to bias the clips toward the front face.
In a second embodiment, the clips are comprised of a deformable, malleable material, and are formed into the iris-receving position by bending each clip over the foot portion of the tool. Once the lens is inserted in its desired position, the foot portion is forced away from the front face. This movement forces the clips to move outwardly toward the periphery which detaches the lens from the tool and secures the lens to the iris.
A principal advantage of the present invention is that the intraocular lens is firmly and safely secured to the iris of the eye.
Another advantage of the present invention is that the intraocular lens apparatus facilitates insertion of the lens into the posterior chamber of the eye and allows the tool to be easily detached from the lens once the lens is in the desired position.
The foregoing and other objects, features and advantages of the invention will be apparent from the following detailed description of the preferred embodiments illustrated in the several figures of the drawing.
IN THE DRAWING FIG. 1 is a plan view of the intraocular lens apparatus in accordance with the present invention.
FIG. 2 is a side elevational view of the intraocular lens apparatus of FIG. 1 with the eye illustrated in phantom.
FIG. 3 is a perspective view illustrating the lens inserted into the posterior chamber of the eye with a portion of the'eye broken away for clarity.
FIG. 4 is a cross-sectional view taken through the lines 4-4 of FIG. 3.
FIG. 5 is a cross-sectional view of an alternative embodiment of the intraocular lens in accordance with the present invention.
FIG. 6 is a side elevational view of an alternative embodiment of the intraocular lens assembly with the lens shown in cross-section in accordance with the presen invention.
FIGS. 7 and 8 are side elevational views illustrating the positioning of the intraocular lens apparatus of FIG. 6 into the posterior chamber of the eye.
FIG. 9 is an enlarged partial side elevational view similar to FIGS. 7 and 8 illustrating the movement imparted to the clips by the foot portion.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings and more particularly to FIGS. 1 and 2 thereof, an intraocular lens apparatus, generally designated by the numeral 10, in accordance with a preferred embodiment of the present invention is illustrated in plan and side elevational views, respectively. The intraocular lens apparatus 10 includes a lens 12 and a surgical lens carrying tool 13.
The lens 12 includes a front face 14, a central portion 16 and an outer edge 18, or periphery. In plan view, the face 14 is substantially oval, forming two elongated ends, so as to define a major axis 19 and a minor axis 20 (shown in dashed lines in FIG. 1) disposed perpendicular to one another and passing through the center. The corners of the intersections of the edges 18 are rounded for safety. The lens 12 is also oval in side elevation view. Three apertures 21 are disposed through the central portion 16 of the lens 12. Since three points determine a circle, the centers of the apertures 21 lie on a circle having its center at, or near, the intersection of the major and minor axes l9 and 20, respectively. Moreover, with reference to the eye into which the lens 12 is inserted, the circle on which the apertures 21 are located has a diameter that is slightly less than that of the smallest size of the pupil. A plurality of recesses 24 are formed in the face 14 near the edge 18. In the preferred embodiment, the lens 12 is formed from pure methyl methacrylate which is the same material that is used in forming contact lenses. Alternatively, it is be lieved that other transparent materials may also be used in forming the lens.
Three clips 25 are mounted to the lens 12. Each clip 25 includes a base portion 26, a leg portion 28 and an arcuate portion 30 integral with and interconnecting the base and leg portions. The clips 25 are substantially circular in cross section with the diameter of the base portion 26 being slightly smaller than the diameter of the apertures 21. This relationship facilitates mounting the clips 25 in a cantilever manner within the apertures 21 and yet enables the clips to be rotatable about an axis through the base portion 26. The diameter of the base portion 26 may be smaller than the diameter of the arcuate portion 30 to further facilitate rotation. The distal ends of the base portion 26 includes flanges 32 to prevent removal of the clip 25 from the lens 12. The leg portion 28 extends above the front face 14 in a direction towards the edge 18 and includes a distal end 34 which is aligned to be receivable by the recess 24. Preferably the end 34 is formed into a needle point which serves to cut into and thus grasp the iris of an eye when placed in contact therewith. Alternatively, the end 34 may extend toward and beyond the edge 18, in which case the recesses 24 are not required. In this embodiment the clip 25 is comprised of a resilient material such as inert steel, titanium, vanadium or other suitable tempered metals. Because of the resilient property of the material, the leg portion 28 is normally biased towards the front face 14.
The surgical tool 13 comprises an integrally formed handle portion 42 and a foot portion 44. The foot portion 44 includes a cylindrical portion 45 which is substantially circular in plan view, and a flange or arm portion 47. In plan view the foot 44 is elongated somewhat elliptical and thus may be described as having a major axis extending across the flange'd portion 47 and a minor axis extending across the diameter of the cylindrical portion 45. The cylindrical portion 45 includes a lens engaging surface 46 which is slightly concave and is adapted to mate with the front face 14 within the central portion 16. The flange portion 47 is formed integral with the foot portion 44 and has a top surface which defines a clip retaining surface 48. The retaining surface 48 serves to attach the lens 12 to the tool 13 and to space the clip 25 from the face 14 such that an iris-receiving recess is formed therebetween. The intersection between the foot portion 44 and the flange portion 47 define notches 49 which serve to receive the arcuate portion 30 of the clips 25. The distance between the notch 49 and the outermost end of the arms 47 is less than the length of the leg portion 28 such that the end 34 is able to be received in the recess 24. The tool 13 is preferably formed from stainless steel.
The lens 12 is mounted to the tool 13 with the lensengaging surface 46 positioned against the central portion 16 of the front face 14. The leg portions 28 of the clips 25 are pivoted about the axis through the base portion 26 and positioned over the flange portion 47 in an iris-receiving position (see FIG. 1). Due to the resiliency and bias of the stainless steel, the clips 25 bear against the retaining surface 48. Surgical tweezers may be used to mount the clips 25 over the retaining surface Referring now to FIG. 3, the lens 12 is illustrated in perspective view as being inserted into an eye 50. Only portions of the eye 50 are shown for clarity. With reference also to FIGS. 7 and 8, the eye 50 includes a posterior chamber 52 and an anterior chamber 54 (see FIGS. 7 and 8) which are separated by an iris 56. The iris 56 is comprised of a spongy tissue and includes a central opening or pupil 60. When the iris 56 dilates, the pupil 60 becomes larger. Conversely, when the iris constricts the pupil 60 becomes smaller. Also referring to FIGS. 7 and 8, a cornea 62 defines a boundary of the anterior chamber 54. During eye surgery a cut is made in the cornea 62 and the cornea is carefully lifted away so as to allow the surgeon entry into the interior of the eye 50.
In operation, after the cornea 62 has been surgically cut, the tool 13 having the lens 12 mounted thereto is inserted into the anterior chamber 54 and manipulated so as to position one of the elongated ends of the lens 12 into the posterior chamber 52 (see FIG. 7). In this position, the iris 56 is disposed in the iris-receiving recess formed between the face 16 and the clip 25. The tool is manipulated upwardly such that the inner perimeter of the iris 56 is in contact with or slightly spaced from the arcuate portion 30. Thereafter, the other elongated end of the lens 12 is moved into the posterior chamber 52 and positioned such that the opposite portion of the iris 56 is disposed in the iris-receiving recess formed by the lower clip 25 and the face 16. Consequently, the lens 12 is disposed in an iris-receiving position with its front face 14 adjacent the iris 56 and with the clips 25 disposed in the anterior chamber 54. With the lens in the desired position, the clips 25 are individually lifted off the retaining surface 48 and rotated about the axis through the base portion 26 until they are free of the flanged portion 47 as shown in FIG. 3. Once the clip is released, the resiliency of the material urges the end 34 of the clip toward and into a clamping engagement with the iris 56 in an irisreceiving position. Depending upon the spring force associated with the resilient material and the sharpness of the end 34, the clip may cut through the iris 56 and enter the corresponding recess 24. The clamping engagement in which the clips 25 secure the iris 56 to the front face 14 is further illustrated in cross-section in FIG. 4. After all of the clips 25 have been removed from the retaining surface 48 of the tool 13, the tool is detached from the lens and may be removed. After the lens 12 is secured to the iris 56 the cornea is sutured to close the; entry into the anterior chamber 54 and the operation is complete.
It should be recognized that in some instances it may be desirable to surgically cut the iris 56 to allow the ends 34 to pass through the iris and into the recess 24.
Referring now to FIGS. 5-9, a second embodiment the lens 12 is similar to the lens previously described but differs in that it includes four clips 25. However, the clips 25 are comprised of a malleable deformable material, such as platinum, gold, or iridium, which enables them to be easily formed into a desired shape. A surgical lens carrying tool 70 includes a lever-like handle 72 comprising lever arms 74 and 76. Integral with the lever arm 74 is a foot 78 having a bore 80 centrally therethrough and having an outer surface formed to define a concave lens engaging surface 84. The outer wall of the foot 78 is curved inwardly toward the axis through the bore 80 and defines a clip retaining surface 90 which serves to attach the four clips 25 to the surgical tool 70 in a manner as will be subsequently described. I-Iingedly connected to the distal end of the lever arm 76 is a plunger 86 which is slidably disposed within the bore 80 of the foot 78.
With reference to FIG. 6, the lens 12 is mounted to the tool 70 with the lens engaging surface -84 matingly disposed against the central portion 16 and with the arcuate portions of the clips 25 deformed inwardly against the retaining surface 90 such that the clip 25 is spaced from the face 14. Accordingly, the clip 25 and the face 14 form a recess therebetween which is adapted to receive the iris 56. Because the arcuate portion 30 of the clip 25 is disposed over the foot 78, the lens is secured to the tool 70.
With reference to FIGS. 7 and 8, the lens 12 is inserted into the posterior chamber 52 in the manner previously described. Once the lens 12 is placed adjacent the iris 56 in the desired position, the lever arms 74 and. 76 are actuated, or squeezed together, thereby forcing the plunger 86 through the bore 80 and against the front face 14 which forces the foot 78 to move away from the face 14. As the foot 78 moves away from the face 114 the retaining surfaces 90 transmit an outwardly directed force against the arcuate portion 30 of the malleable clips 25 (see FIG. 9). Consequently, the clips 25 are moved outwardly away from the foot 78 and toward the front face 14. Continued movement of the foot 78 eventually releases the lens 12 from the tool 70 and forces the ends 34 into engagement with the iris 56 as shown by the dashed lines in FIG. 9.
It should be realized that in some instances the surgeon may prefer to bend the end 34 against and into the iris 56 prior to actuating the lever arms 74 and 76. This assures that the lens 12 is clamped to the iris 56 before detaching the lens from the tool 13.
Although the tool has been described as comprising a plunging mechanism, it should be recognized that other reciprocating mechanical movements may be employed to free the lens from the tool. Moreover, should it be desired, the ends 34 may be formed into a hook shape to facilitate a clamping engagement with the iris 56. In addition, the shape of the lens and the number of clips may vary as will be easily seen by those skilled in the art.
From the above description it can be seen that an intraocular lens apparatus has been described which fulfills all of the objects and advantages set forth above.
While the invention has been particularly shown and described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various alterations and modifications in form and in detail may be made therein. Accordingly, it is intended that the following claims cover all such alterations and modifications as fall within the true spirit and scope of the invention.
What is claimed is:
1. An intraocular lens apparatus for insertion into a posterior chamber adjacent the iris of an eye, comprising:
a lens having a front face, a central portion and an outer periphery; and
a plurality of cantilevered clips, each mounted to said central portion and extending outwardly from said face and toward said periphery, said clips being adapted to secure the iris to the front face of said lens when said lens is positioned within the posterior chamber of the eye immediately behind the 2. An intraocular lens apparatus as recited in claim 1 wherein said face includes a plurality of recesses for respectively receiving the securing portion of each of said plurality of clips.
3. An intraocular lens apparatus as recited in claim 1 wherein said clip is comprised of a resilient material, said material serving to bias said clip toward said face.
4. An intraocular lens apparatus as recited in claim 3 wherein each clip includes a. base portion mounted to said central portion, said base portion being rotatable about an axis therethrough.
5. An intraocular lens apparatus as recited in claim 4 wherein said central portion includes a plurality of apertures therethrough and wherein said base portions extend through corresponding ones of said apertures.
6. An intraocular lens apparatus as recited in claim 4 wherein each said base portion includes a flange portion for securing said clip to said lens.
7. An intraocular lens apparatus as recited in claim 1 wherein each said clip is comprised of a deformable, malleable material such that said clip may be formed into a predetermined shape. 1
8. An intraocular lens apparatus as recited in claim 7 wherein each said base portion includes flanges at its respective ends for securing said clip to'said lens.
9. An intraocular lens apparatus as recited in claim 1 and further including in combination, a lens carrying tool for use in inserting said lens into the eye, said tool including a handle portion, and a foot portion, said foot portion having a lens engaging surface adapted to engage said front face, and means forming a clip retainer for attaching said lens to said foot portion and for retaining each said clip spaced from said face, whereby said tool may be used to selectively position said lens in the posterior chamber of the eye and may then be detached from said lens by moving said clips from said clip retainer.
10. An intraocular lens apparatus comprising in combination:
a lens having a front face, a central portion and an outer periphery, and a plurality of cantilevered clips, each mounted to said central portion and extending outwardly from said face and toward said periphery, said clips being movable from an irisreceiving position to an iris engaging position; and
a lens carrying tool including a handle portion and a foot portion, said foot portion having a face engaging surface for engaging said front face, and means forming a clip retainer for attaching said lens to said foot portion and for retaining said clips spaced from said face in said iris-receiving position whereby, said tool may be used to selectively position said lens in the posterior chamber of the eye and may then be detached from said lens by moving said clips from said iris-receiving position to said iris-engaging position thereby securing said lens to the iris.
11. An intraocular lens apparatus as recited in claim 10 wherein said foot portion includes a plurality of notches extending between said lens engaging surface and said clip retainer for receiving respective ones of said plurality of clips.
12. An intraocular lens apparatus as recited in claim 11 wherein said foot portion in plan view has a major axis and a minor axis, said major axis having a length greater than, and said minor axis having a length less than the length of a corresponding diameter of said central portion and wherein said plurality of clips lie in the periphery of said central portion such that the lens may be inserted into the posterior'chamber of the eye.
13. An intraocular lens apparatus as recited in claim 11 wherein said notches lie on a circle having a diameter substantially equal to the diameter of said central portion.
14. An intraocular lens apparatus as recited in claim 13 wherein the distance between said notch and the outer boundary of said foot portion is less than the outwardly extending length of said clip.
15. An intraocular lens apparatus as recited in claim 10 wherein said foot portion includes first means responsive to an actuating force and operative to move said clip retainer away from said front face, and wherein said handle portion comprises means for actuating said first means, whereby actuation of said first means moves said clip retainer away from said front face, thus forcing said clips away from said clip retainer which thereby releases said lens from said tool and moves said clips into engagement with the iris.
16. An intraocular lens apparatus as recited in claim 15 wherein said handle portion comprises first and second lever arms configured as a lever, said first arm carrying said foot portion and said second arm carrying said first means, whereby movement of said lever arms toward one another actuates said first means.
Q UNITED STATES PATENT OFFICE I CERTIFICATE OF CORRECTION Patent No 3,913,148 -W be e Inventor(s) Ernst W. Potthast t is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
Column 1, Line 4, "introcular" should read --in1 :raocular-.-;
Column 1, Line 6, "apparauts" should read -apparatus-;
a Column 3, Line 62, after "inert" insert sta inles';
Signzd and Scaled this Thirty-first Day of August 1976 a Arrest:
RUTH C. MASON C. MARSHALL DANN Alresting Officer Commissioner oflarems and Trademarks
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|U.S. Classification||623/6.12, 623/6.38, 65/31, 606/107|
|Cooperative Classification||A61F2/16, A61F2/1662|
|European Classification||A61F2/16C, A61F2/16|