DE2510099A1 - ARTIFICIAL INTRAOCULAR LENS - Google Patents

Description

PATENTANWÄLTE _{8 K; aNC} MEN B 7. K&TZ 1975 D R.-IN G. H. FINCKE Μοίίβηηαββ 31 DIPL-ING, H. BOHR Telephone: (O89) * 24i040 DIPL.-ING. S. STAEGER telegrams: Claim »Munich Telex: 523903 claim d

mopp.no. AO92 - B / vS / Hö

Please state in the answer Patent Attorneys Dr. Find · ■ Bohr · Staeger ■ 8 Munich 5 · MOIIeritraBe 31 _. . " _ΛΛ7 η ,,

Docket No. 2O7H1

LEONARD- PLOM Westport, Connecticut, V.St.A.

"Artificial, intraocular lens"

PRIORITY: 7 March 197 ¹ I - 448 966 - USA

The invention relates to artificial, intraocular lenses for implantation in the posterior chamber of the eye Elimination of aphakia, and also a device for holding and guiding the artificial, intraocular Lens during implantation.

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Bank details ι Bayer. Vereintbank Munich, account “20404 · PortidieddcontoiMOnchen 27044-802

If the eye has no lens, what is more aphakic Condition or aphakia and is usually the result of intra- or extracapsular lens extraction is, it does not have the ability to focus rays of light. As a result, the eye gets a blurred image, and vision is deteriorated.

Contact lenses or glasses are usually used to remedy the aphakic condition with the help of focusing agents or a combination thereof placed between the eye and the light penetrating into it. Both contact lenses as well as glasses have disadvantages when used to treat aphakia. Neither glasses nor contact lenses can copy the natural optical system, as they are arranged outside the eye and thus opposite the natural state lead to a shift of the optical center. By shifting the optical center the image received by the eye is either distorted and / or changed in size. In particular, glasses and / or contact lenses are usually not used to improve binocular vision after removal or loss to restore the lens of one eye when the other eye is working normally.

The most common reason for lens removal is the condition of lens opacification, known as cataract, which occurs primarily in the elderly who have difficulty fitting and manipulating contact lenses during insertion and removal. The cataract is also common in animals, such as dogs and horses, and contact lenses and / or glasses are likely to be used in this

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In case there are no suitable means for its treatment.

The desirability of implanting an artificial lens in the eye to eliminate the aphakic condition is known and is accepted, for example, in England, Holland and Italy. However there is there are still no perfect practical devices to achieve this goal, although various devices have more or less success have been used.

Around 1950 Harold Ridley developed an artificial intraocular lens that consisted of an optical zone, from which three foot-like, projections or "feet" continue in a radial direction outward. Ridley originally had this lens placed in the posterior chamber, behind the iris, with the feet on the central body rested between the ciliary process and the base of the iris. The arrangement of this lens in the posterior chamber has been made However, completely abandoned, as in some cases the lens shifted after implantation and resulted in glaucoma or the like, probably due to irritation of the ciliary body from the feet.

Ridley's failure with artificial lenses in the posterior chamber led him and others, such as D.P. Choyce to turn to intraocular, artificial lenses implanted in the anterior chamber between the iris and cornea will. The lens used for this was similar to Ridley's original lens and had protruding radially Feet that allowed the lens to be attached in front of the pupil. These efforts also had limited success,

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mainly because of the problems caused by the irritation of the eye from the supporting feet and the displacement of the lens originated from their desired position in front of the pupil.

It should be noted that the arrangement of the lens in the anterior chamber is unnatural, with regard to the associated problem of restoring proper binocular vision. Also, a lens in the anterior chamber is not close to the vitreous membrane to support the vitreous fluid attached, and a displacement of the vitreous humor and a retinal detachment is in this case more likely than when using lenses, in the posterior chamber.

E. Epstein and C. D. Binkhorst developed artificial, intraocular lenses built on the positioning mechanism of the constrictor muscle of the iris. Epstein developed first a "collar-stud" - implant, whereby the pupil is positioned in its center is constricted, and later a pupil-containing one "Malteser Kreuz" ("Maltese Cross") - implant, which has two wings in front of the iris and two wings at right angles to it behind who had iris. Binkhorst developed an iridocapsular (2-loop) lens ("iridocapsular (2-loop) lens") and an iris clip (4-loop) lens ("iris-clip (4-loop) lens "). The former consisted of a lens, the diameter of which was larger than that of the pupil, and the one above the pupil was arranged so that its circumference was against the front of the iris, and had two metal loops, which of protruding from the rear of the lens and essentially moving away from each other

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parallel to the surface of the back of the lens and behind the iris to clamp the lens to the iris. Binkhorst's iris clamp lens was similar except that the iris was held in place by two pairs of loops flanking the iris and "Hold the lens in front of the pupil. In some cases. the iris was sutured with the clamps to make a firm Ensure the position of the lens. This type of lens is also unsatisfactory in several respects. It necessarily acts on the constriction of the pupil; actually it fixes the size of the Pupil. In addition, it is a lens attached to the anterior chamber, with the help of which a correct positioning of the optical center cannot be achieved.

J.6.F. Worst kept an arrangement of the artificial lens in the posterior chamber considered desirable and developed a lens that had a pair of closely spaced openings for positioning the lens behind the iris. A seam passed through the two openings held the Lens fixed to the iris. Although the Worst implant is not believed to cause irritation to the ciliary body, as did the earlier Ridley lenses placed in the rear outer chamber, the technical leads Difficulty suturing the lens in place without destroying the iris as well as the possibility of the The suture does not hold or rips out of the iris, resulting in a limited use of worst-sight lenses.

Another artificial lens for the posterior chamber is described in US Pat. No. 3,711,870 to Deitrick.

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Deitrick's lens consists essentially of a central optical zone which is surrounded by an elastic silicon flange which is shaped so that it is received by or rests on the central body. The lens is held in place by sewing the elastic flange on the ciliary body. Although the medical value of the Deitrick ¹ see lens is not yet known, it is known that it would be difficult: to attach the sutures to the location determined by Deitrick. It is also known that on the part of ophthalmologists and eye surgeons there is an aversion to this lens or its suturing because of the various risks associated with irritation of the ciliary body.

Several known lenses have been discussed in the article by DP Choyce, "History of Intraocular Implants" in "Annals of Ophthalmology", Oct. 1973 _p. The article is also accompanied by a list of references from which further information regarding known intraocular lenses can be found.

Many of the above lenses have to be attached to the iris Sutures are implanted to hold the lenses in place. It should be noted that the iris consists of a spongy, resilient fabric, which is drawn and non-destructive only within certain limits can be stretched. However, the iris has the property that it will never return after an incision or destruction heals together. So if a seam tears out of the iris, then the destruction of the iris is permanent. If one, with help Lens displacement forces positioned and held by seams is subjected, the sutures, usually of small diameter, can cut through the iris

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and permanent destruction

The artificial intraocular lens according to the invention is a lens for the posterior chamber, with which all the advantages of a natural arrangement of the lens are achieved. The artificial, intraocular lens is held in place with the help of several pin clasps that are extend from the periphery of the lens and pass through the iris. The pen clasps are angled to allow for displacement to prevent the lens. In one embodiment, the pin clips on one are the optical zone around surrounding splash attached. Also are at the transition Between the lens and the puddle drainage holes are provided to allow free drainage of the produced by the ciliary body Allow aqueous humor. In other embodiments, the pin clips on the outer periphery of the optical Zone of the lens attached without using a splash.

The artificial intraocular lens according to the invention is held in their natural position in the posterior chamber. No seams are required, which is what the The implantation technique of the lens is simplified and the avoids possible destruction of the iris by sutures. The artificial intraocular lens according to the invention avoids any contact with the ciliary body and, with it, the many serious risks associated with such contact are.

The ease with which the artificial intraocular lens can be implanted is made possible by an introducer loop enlarged, consisting essentially of a semi-rigid loop

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consists of two of the drainage holes on the circumference the lens is guided so that the lens is wrapped around and carried by the insertion loop. The bow ends in a flick of the wrist. This way the lens can be easily held and manipulated during implantation will. Since the introducer loop is firmly connected to the lens the latter cannot fall or get out of the control of the eye surgeon. This is in contrast to the usual procedures in which the artificial, intraocular lens with the help of forceps or other clamping instruments held during implantation. The introducer loop can be removed after implantation be cut and pulled out of the lens.

With the help of the lens according to the invention for the posterior chamber of the eye True binocular vision can be achieved, and complications from irritation of the ciliary body and / or the advancement of the vitreous humor and retinal detachment do not occur here.

The invention is essentially based on the object of an artificial, intraocular lens for the treatment of the Creating aphakia.

Another object of the invention is to provide an artificial, intraocular lens for implantation in the posterior To create eye chamber.

Another object of the invention is to provide a to provide artificial intraocular lens which has means for positioning the same in the eye without thereby sensitive areas of the eye become irritated.

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Another object of the invention is to create an artificial, intraocular lens that is simple is insertable.

Another object of the invention is to provide means for holding the artificial, intraocular lens during of implantation.

Further objects on which the invention is based also emerge from the following description of the invention on the basis of of exemplary embodiments and with reference to the accompanying drawings.

In the drawings show:

Pig. I a front view, partially cut away, one artificial intraocular lens according to the invention;

Fig. 2 is a side view, partially cut away, of the artificial, intraocular lens according to FIG. 1;

Fig. 3 is a sectional view of part of a further embodiment an artificial intraocular lens according to the invention;

4 shows a side view of a further exemplary embodiment an artificial, intraocular one according to the invention Lens;

. Fig. 5 ejrenSchnitt through the lens of Figure ¹ I taken along line 5-5 in Fig. 4;

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Pig. Figure 6 is a front view of the Pig lens. I with a attached introducer according to the invention;

7 shows a section through the handle of the Einfilhrsc-hlinpe along line 7-7 in Figure 6;

Fig. 8 is a front view of a further embodiment form an artificial, intraocular lens connected to an introducer loop according to the invention is; '

9 shows a section through an eye, the according to the invention, artificial intraocular lens can be seen during implantation;

Fig. 10 is a section through an eye, the inventive fle, artificial intraocular lens can be seen after implantation;

11 is a plan view of an eye with an implanted therein, artificial intraocular lens according to the invention;

Fig. 12 is a plan view of an eye in which another embodiment the inventive, artificial, intraocular lens is implanted; and

13 shows a plan view of an eye in which a further exemplary embodiment of an artificial, intraocular lens is implanted. .

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Figures 1 and 2 show an inventive, artificial, intraocular lens 10. The lens 10 generally consists essentially of an optical 2οη? 5.1, a Plansch 12 surrounding the optical zone 11 at its periphery, and a plurality of pin clips 13, I ¹ U 15, 1-6, IT, IB, and 20, for anchoring the lens 10 in the eye. A plurality of drainage holes 21, 22, 23 and 2H lead through the plan 12, to be precise in the vicinity of the location of the flange 12 which adjoins the optical zone 11.

The optical zone 11 can be a biconvex or a plano-convex lens as required. Preferably the shape is the optical zone as close as possible to that of the natural lens of the eye. The optical zone can have a diameter D from 7 to 8 mm; this diameter is of course only a suggestion and corresponds approximately to the diameter, which has a natural eye lens, and it should be pointed out that the artificial, intraocular lens 10 can and should be adapted to the size of the eye in which it is implanted. The power of the artificial, intraocular lens 10 should generally range between 13 and 17 diopters, the ultimate decision being the strength of the refractive power is left to the eye surgeon who examined the patient.

The flange 12 surrounds the optical zone 11 at its periphery and increases the overall diameter of the artificial, intraocular lens 10 to approximately 9 to 10 mm. The plan 12 is intended to hold the pin clips 13-20, in particular to attach the pin clips 13-20 at intervals radially outward from the optical zone 11. The drainage holes 21-24 are provided at the transition of the flange 12 to the optical zone 11 and at 90 ° intervals around the cpti-

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see zone 11 arranged. The drainage holes 21-2 ^ provide for a free outflow of the comb water formed by the ciliary body through the lens into the anterior chamber, which is best seen in FIG.

Ir. The artificial, intraocular Linas IO eight pin clips 13-SC are arranged in four pairs along the circumference of the flange 12. Each pin chipboard 13-20 protrudes forwards from the flange 12 and is curved in such a way that its outer end is arranged essentially parallel to the plane of the flange 12. Jeöe pen clasp 13-20 is about 2 mm long; Your outer end is preferably enlarged and rounded, which can be seen, for example, on the basis of the supporting span 16 under reference number 28. The base of each stud clamp 13-20 is arranged on the outer circumference of the flange 12 and the bases of each pair of stud clamps 13-20, for example the pair of stud clamps 15 and 16, have a distance S from one another which can be approximately 1 mm. Within each pair of the pin clasps 13-20 they protrude in opposite directions from each other and along the outer periphery of the flange 12. In the artificial intraocular lens 10, the pin clasps 13-20 form a unit with an annular band 25 which follows itself outwardly opening, circumferentially arranged in the flange 12 groove 26 is fitted.

The pen clasps 13-20 and the annular band 25 can be made of gold or vitalium or other suitable quality material. From a medical point of view, it must also be suitable for implantation in the eye and, in addition, it must be flexible and bendable enough to enable alignment or manipulation and to exclude the risk of breakage. The optical zone 11

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and the flange 12 are preferably made of polymethyl methacrylate made of medical grade. The annular band 25 can at least partially in the Plansch 12 by compression molding the optical zone 11 and the flange 12 encapsulated with the annular band 25 and the pin clips 13-20 adhered thereto will.

3 is a further exemplary embodiment of the invention part of an intraocular lens is shown. The lens 30 is the lens 10 except for the means for attaching the pen clasps similar. In the lens 30, the pen clasps, for example the pen clasp 31, are on a circumferential Flange 35 fastened by inserting the same into preformed openings in flange 35. A widened base 32 can be provided at the end of the pin chipboard 31 to prevent it from being pulled out of the opening. The pin braces may further be attached to the flange 35 by an adhesive that is left during the insertion of the pin clasps 30 is placed in the openings. Instead you can the pen clasps can also be encapsulated by properly positioning the lens 30 during molding.

In FIGS. 4 and 5, an artificial, intraocular lens 40 is shown as a third exemplary embodiment of the invention. The lens 40 does not have a flange running all around, but has a shape similar to that of the natural lens of the eye. Several pairs of pin clips are arranged in the area of their outer circumference. In this embodiment, you can the pen clasps are not positioned as far from the center of the lens as in the case of the previously described ones Lenses was possible, but the lens 40 has the advantage that no flange comes into contact with the ciliary body could protrude outwards.

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Fig. 5 illustrates the attachment of the pinchips on the artificial intraocular lens 40. The pen clasps 4l and 4 2 form a pair of pen spans and form over a connector 43 one unit. The connector 4 3 can be substantially C-shaped; it gets in the lens 40 encapsulated during compression molding. Instead, the pen clasps can be attached to the lens 40 thereby be that one made a unit consisting of an annular band 'and the pin clasps, and that annular band attached to the outermost periphery of lens 40, similar to the structure on lens 10. The pen clips may also be attached by drilling holes through or in the lens 40 and inserting the pin clips into them, similar to the lens 30.

Since the lens 40 does not have a radially outwardly projecting flange, it is not necessary to have drain holes at the edge of the lens 40 to be provided for the aqueous humor.

The invention also relates to an introducer loop used by the eye surgeon in handling, inserting and manipulating the artificial intraocular lens during implantation. An insertion loop 50 according to the invention is shown in FIG. 6 and consists essentially of a semi-rigid loop 51, from which an end piece 52 leads to a handle 53. In FIG. 6, the insertion loop 50 is shown in use with the artificial, intraocular lens 10 according to FIGS. 1 and 2. The loop 51 leads through the drainage holes 22 and 24, so that the loop portion 51A wraps around the rear side of the optical zone 11 of the lens 10. The loop portion 51A is preferably dimensioned so that the portions of the loop 51 leading from the drainage holes 22 and

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25100S9

24 converge off towards the end 52, under the? * Pen clasps 17 and 18 pass through; here the pin clips 17 and 18 contribute to keeping the lens IO in the loop 51 to hold. The Schlirr ^ 51 can, if necessary » slightly disengaged from the braces 17 and 18 will.

According to FIG. 7, the handle 53 preferably has an elongated oval or flat cross section, with which the lens can be easily rotated. The flat surface is preferably essentially parallel to the surface of the lens 10, so that the handle 53 forms a marking for the orientation of the lens 10. The loop 51 and the end piece 52 are preferably made of a semi-rigid material, for example a superamide or Vitallium wire, or polyethylene or another plastic hose or wire; the handle 53, in which the end piece 52 is attached, can consist of the same material.

In Fig. 8, an artificial, intraocular lens 60 is shown as a fourth embodiment of the invention. Lens 60 is similar to lens 10 except that drain holes 61, 62, 63 and 64 of lens 60 are located between the tips of adjacent pairs of clasp rather than near the bases of each pair of clasps. The insertion loop 50 is connected to the lens 60 by passing the loop 51 through the drainage holes 62 and 6h . The parts of the loop 51 which lead from the drainage holes 62 and 6k to the end piece 52 run under the pin clips 65 and 66 or 67 and 68; this arrangement ensures a good engagement between the pin clips 65 and 66 or 67 and 68 with the

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converging sections of the loop 51 · However, this arrangement should not be selected if a pair of pin clasps are placed on the leading edge during implantation
of the intraocular lens 60, as shown in FIG
Fig. 6 is shown.

In Figures 9 and 10, an eye is shown in which
an inventive, artificial, intraocular lens is or is implanted. The eye 70 includes a transparent Xornea (cornea) 71, "it ^ the whiteness of the Au" is known to ₃ with the sclera (sclera) 72, under the name, is connected. The sclera 72 extends
substantially around the entire eye 70, with the exception of the area of the cornea 71. A thin membrane 73, known as the conjunctiva, continues from the cornea 71 to the underside of the eyelid. Schlemm's canal 7 * is located near the transition between cornea 71 »sclera 72 and conjunctiva 73. In the back of the eye 70
The choroid (choroid) 75 lies above the inner surface of the sclera 72 and the retina (retina) 76 lies above the inner surface of the choroid 75 Includes ciliary muscle 8l. From the ciliary body Π goes the iris 82, which the pupil 83
limited, out. The chorioids 75, the ciliary body 77 and the iris 82 are known collectively as the uveal tract, the uveal tract is a vascular (vessel-containing) tract that surrounds most of the eye 70.

The interior of the eye is essentially filled with the vitreous fluid 90; the membrana hyaloidea ( glass skin) 91 covers the surface of the vitreous body fluid 90. The

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anterior chamber 92 lies between cornea 71 and the front of the iris 82. The posterior auber chamber 93 lies between the iris 82 and the vitreous humor 90. The natural lens that is not shown in these drawings is shown, the rear eye chamber 93 fills more or less and is with the aid of the apparatus suspensorius lentis (ribbon of rays) 94 held in position; the apparatus suspensorius lentis 94 is cut through in the drawings, what at a distance the natural lens is actually made.

The iris 82 delimits the in the form of a central opening Pupil 83. The sphincter and dilator muscles, pupillae 84 and 85, are near the inner periphery of the iris 82 arranged and regulate the size of the pupil 83. The expansion and contraction of the tissue of the iris 82 occurs mainly in the vicinity of the sphincter and dilator muscles, pupillae 84 and 85. The iris stroma 86 extends to the iris 82 extends between the ciliary body 77 and the inner portion of the iris 82 and closes the sphincter muscles and dilator pupillae 84 and 85 a. The iris stroma 86 folds during dilation and contraction of the pupil 83 passively and in a corresponding, same way. The iris tissue, including the iris stroma 86, is very flexible and can be pulled and stretched. The iris, however, has the unique property that it resists rupture or destruction no longer heals. Accordingly, care must be taken in handling the iris 82.

To according to FIG. 9, the inventive, artificial, intraocular To implant lens 10 into eye 70, pupil 83 is dilated to such an extent that lens 10 is inserted through it without making a cut in the iris-82

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must be performed. The musculi sphincter and dilator pupillae 8 ¹ I and 85 have to be stretched a little so that the lens 10 can be passed through, but if this is done carefully, these muscles will not be damaged in the process.

The cornea 71 becomes near Schlemm's canal 7 ^ cut through and folded back. If the implantation of the artificial intraocular lens 10 is performed for the treatment of a cataract, the removal should be performed the natural lens and the implantation of the intraocular lens 10 are preferably performed in the same operation will. In this case, the first step after cutting through and folding back the cornea would be 71 depending on the condition intra- or extracapsular extraction of the patient.

With the aid of the insertion loop 50, the artificial, intraocular lens 10 is guided under an edge of the iris 82, and the front pair of pin clips 13 (shown) and I ¹ I (not shown) are pushed through the iris stroma 86. Thereafter, the converging portions of the loop 51 of the introducer loop 50 can be disengaged from the anchoring pin chips and the lens 10 fully inserted into the iris 82. The remaining pin chips, for example the pin chips 18, 19 and 20 (shown) can now be passed through the iris stroma 86, the iris stroma 86 being stretched so that the tip of each pin chip 13 to 20 passes through the iris stroma 86 at the point at which the base of the anchoring pin chips 13 to 20 finally rests on the relaxed iris stroma 86.

After the lens 10 is firmly inserted into the posterior chamber 93 , and the pin clips 13 to 20 through the

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Iris stroma 86 are guided, loop 51 of the introducer loop 50 cut through and the introductory line 50 can be removed. The eye surgeon can then do the Autre 70 close with the help of conventional ophthalmic techniques.

Fig. 10 shows the artificial implant implanted in the eye 70 intraocular lens 10. The intraocular lens 10 is arranged in the posterior chamber 93 so that it is natural Condition is largely copied and good binocular vision is restored. The Iris 82 is shown with a pupil 33 contracted to its normal position and it can be seen that the Pin clasps 13-20 protrude through the iris strema 86 at the point where they do not cause irritation. There too the iris stroma 86 passively collapses and opens during the dilatation and contraction of the pupil 83, guiding the lens does not pull or tear the iris 82 and remains in its correct position.

It is also pointed out that the artificial, intraocular lens 10, and especially its splash 12, is wide enough are removed from the ciliary body 77 so that they do not cause irritation. The ciliary body 77 can contract somewhat, and the ciliary muscles8l atrophy or shrink, whereby the distance from the implanted lens 10 is increased. The drain holes 21-24 are arranged so that they allow the caraner water formed by the ciliary body 77 to drain freely to the front part of the lens 10 and the iris 82 and to the anterior chamber 92, even when the edge region of the lens 10 is in contact with the iris 82.

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The artificial intra-angular lens 10 also provides Support or retention in the vitreous membrane 91 and the vitreous fluid 90. It is expected that weniper Cases of retinal detachment follow cataract surgery when using an artificial intraocular lens 10 according to the invention.

The implantation of the other exemplary embodiments, the Artificial intraocular lenses according to the invention are carried out in a similar manner. The location of the other lenses in eye 70 is similar after implantation, i.e. the lenses are in the posterior chamber 93 with clips held, which lead through the iris stroma 86 to the front.

In Fig. 11 is a front view of an Aup-es 70 is shown, in which an artificial intraocular lens 10 is implanted. It should be noted that the Pin chucks 13-20 protrude through the iris 82 in its outer or stroma portion 86, and that the lens is supported without obstruction of the dilatation of the pupil 83. The optical zone 11 of the lens 10 is, as required, arranged behind the pupil 83.

In Fig. 12 an eye 100 is shown with an iris 101, on which a peripheral iridectomy (excision of the iris) is performed using standard techniques to correct glaucoma has been. Accordingly, the iris 101 has the usual pupil 102 arranged in its center and, in addition, a se · Kundary pupil 103 located in the periphery, which results from the perlpheric iridectomy. As a further example of the invention is an artificial intraocular lens

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110 has been implanted in the eye 100. The lens 110 is characterized by pin chips 111, 112, 113, II ² », 115 and 116, which are arranged along the circumference in three pairs with the same distance from one another. Three pairs of pen chips 111-116 are sufficient to hold the lens 110 in place and can easily be arranged so that they do not obstruct the secondary pupil 103 created by the peripheral iridectomy.

13 shows a further eye 120 in which a sector iridectomy has been carried out on the iris 121 is to enlarge the pupil 122 so far that it extends to the periphery of the iris 121. Another embodiment of the invention, in the form of the artificial intraocular lens 125, is implanted in the eye 120 been. The lens 125 is provided with six pin clips 126, 127, 128, 129, 130 and 131, which run along the circumference of the lens are arranged in three pairs; in contrast to the previously described exemplary embodiments, however, the Bases of the first pin chip pair 126 and 127 further apart, around the elongated pupil 122 between to log in and adapt to it. The remaining pen clips 128-131 are in two pairs, essentially to the first pair of pin clasps 126 and 127 are at the same distance, arranged along the periphery of the lens 125.

FIGS. 12 and 13 illustrate that the inventive artificial, intraocular lens in a large number of medical cases, for example in a peripheral one Iridectomy, or a sector iridectomy, can be used.

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For a person skilled in the art it is of course apparent that a number of modifications can be made within the scope of the invention can be carried out on the artificial intraocular lenses according to the invention. For example, the number the pen clasps and their positioning can be changed; Similarly, the number of drain holes and whose positioning can be changed. There can also be other materials for the production of artificial, intraocular lenses are used, and those mentioned here Materials are of course only examples. The size of the artificial intraocular lens can be changed, especially if the lenses are in animal eyes are to be implanted. Other aids for holding and handling the lenses can also be used. For example, the artificial, intraocular lens can be held and retained with the aid of conventional forceps, or with the help of a flexible, truncated instrument through which an opening leads to which a negative pressure is applied, so that the lens is held on the instrument by the negative pressure and released from it by pressure equalization. With regard to to the described implantation techniques of artificial intraocular lenses it is to be said that the various Eye surgeons according to their own experience and preference use different techniques.

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Claims (28)

PATENT CLAIMS I * Artificial, intraocular lens for implantation in the posterior chamber of the eye, characterized by an optical zone (11), which consists of a transparent material and is shaped like the natural lens of the eye, and several pin clips (13-20; 31; 4I ₃ 42 ; 65-68; 111-116; 126-131), which are attached in the peripheral area of the optical zone (11) and protrude from there in order to hold and position the lens (10; 3O; 40; 60; 110; 125) to be able to be passed through the iris (82) in the eye (70). 2. Lens according to claim 1, characterized by one formed in the outer periphery of the optical zone (11) Groove (26) and an annular band (25) which forms a unit with the pin clasps (13-20), and is received appropriately by the groove (26) so that the pin clips (13-20) with the optical zone (11) are connected. 3. Lens according to claim 1, characterized by openings formed in the periphery of the optical zone (11) for receiving and holding the pin clips (31; 41-42; 65-68; 111-116; 126-131). 4. Lens according to claim 1, characterized in that the 509837/0331 inner portions of the pin clips (13-20; 31; 41, 42; 65-68; 111-116; 126-131) protrude from the optical zone (11), and the pin clips (13-20; 31; 4l, 42; 65-6R; 111-116; 126-131) are curved so that their outer portions along the periphery of the optical zone (11) and substantially run parallel to their plane. 5. Lens according to claim 4, characterized by an even number of pin clips (13-20; 31; 4l, 42; 65-68; III-II6; I26-I31), in pairs along the periphery of the optical Zone (11) are arranged, each pair of pin clips (13-20; 31; 41, 42; 65-68; 111-116; 126-131) substantially from two pin clips (13-20; 31; 41, 42; 65-68; 111-116; 126-131), the outer sections of which extend along the periphery of the optical zone (11) in opposite directions Directions extend. 6. Lens according to claim 1, characterized in that the inner portions of the optical zone (11) adjacent Pin clips (13-20; 31; 41, 42; 65-68; 111-116; 126-131) protrude from the optic zone, and the pin clips (13-20; 31; 4l, 42; 65-68; III-II6; 126-131) are curved so that their outer sections along the periphery of the optical zone (11). 7. Lens according to claim 6, characterized by an even number of pin clips (13-20; 315 4l, 42; 65-68; III-II6; 509837/0331 126-131) arranged in pairs along the periphery of the optical zone (11), each pair of pin clips (13-20; 31; 41, 42; 65-68; 111-116; 126-131) essentially from two pin clips (13-20; 31; 41; 42; 65-68; 111-116; 126-131), the outer sections of which extend along the periphery of the optical zone (11) in opposite directions Directions extend. 8. Lens according to claim 7, characterized in that eight pin clips (13-20; 31; ¹ II, 42; 65-68) are arranged in four pairs. 9 · Lens according to claim 1, characterized by a straight one Number of pen clips (13-20; 31; 4l, 42; 65-68; III-II6; 126-131) arranged in pairs along the periphery of the optical zone (11), each pair of pin clips (13-20; 31; 41, 42; 65-68; III-II6; 126-131) essentially from two pin clips (13-20; 31; 41, 42; 65-68; 111-116; 126-131) exists. 10. Lens according to claim 9, characterized in that each pair of pin clasps (4l, 42) have an interposed therebetween extending connecting piece (43) is designed into a unit and the pin clips (4l, 42) by embedding the Connecting piece (43) are attached in the optical zone (11). 11. Lens according to claim 9, characterized in that the pairs of pin clips (4-1, 42) along the periphery of the 509837/0331 optical zone (11) have the same distances from one another. 12. Artificial, intraocular lens for implantation in the posterior chamber of the eye, characterized by an optical zone (11) made of a transparent material, which is shaped like the natural lens, a flange (12; 35), which is part of the optical zone (11) is formed and extends from the periphery of the optical zone (11) radially outward, and a plurality of pin clips (13-20; 3D, which is attached to the flange (12; 35) are and protrude forward from there in order to hold and position the lens (10; 30) in the eye (70) the iris (82) can be passed through. 13. Lens according to claim 12, characterized by one formed in the outer periphery of the flange (12) Groove (26) and an annular band (25) which forms a unit with the pin clasps (13-20), and is appropriately received by the groove (26) so that the pin clips (13-20) are connected to the flange (12) are. 14. Lens according to claim 12, characterized by in the Openings formed on the periphery of the flange (35) for receiving and holding the pin clips (31) 15 · Lens according to claim 12, characterized by an even number of pin clips (13-20; 31) which run in pairs the periphery of the flange (12; 35) are arranged, each pair of pin clips (13-20; 31) essentially 509837/0331 union consists of two pin chips (13-20; 31) attached to adjacent points of the flange (12; 35). l6. Lens according to claim 15> characterized in that each pair of pin snails (13-20; 31) via a connector extending therebetween to one Unit is designed and the pin clips (13-20; 31) by embedding the connector in the splash (12; 35) are attached. 17 lens according to claim 12, characterized in that the inner portions of the pin clips (13-20; 31) adjacent to the flange (12; 35) protrude from the flange (12; 35), and the pin clips (13-20; 31) are curved so that their outer portions along the periphery of the Flange (12; 35) and run essentially parallel to the plane of the flange. l8. A lens according to claim _17S characterized by an even number of pin clips (13-20; 31) arranged in pairs along the periphery of the flange (12; 35), each pair of pin clips (13-20; 3D being substantially composed of two pin clips (13-20; 31) attached to adjacent points of the flange (12; 35), the outer portions of which extend in opposite directions along the periphery of the flange (12; 35). 19 · Lens according to claim 12, characterized in that the inner sections of the Pin clips (13-20; 31) from the flange (12; 35) 509837/0331 gen, and the pin clips (13-20; 31) are curved so that their outer portions along the periphery of the Flange (12; 35) run. 20. Lens according to claim 19, characterized by an even number of pin clips (13-20; 31), which in pairs along the periphery of the flange (12; 35), each pair of pin clips (13-20; 31) being substantially consists of two pin clips (13-20; 31) attached to adjacent points of the flange (12; 35), the outer portions of which extend in opposite directions along the periphery of the flange (12; 35) extend. 21. Lens according to claim 20, characterized in that eight pin clips (13-20; 31) arranged in four pairs are. 22. Lens according to claim 20, characterized in that the pairs of pin clips (13-20; 31) along the The periphery of the flange (12; 35) have the same distances from one another. 23 · Lens according to claim 22, characterized by several Drain holes (21-24), which in the area between the flange (12; 35) and the optical zone (11) through the artificial, Guide the intraocular lens (10; 30; 40; 60; 110; 125) through it and disposed near the inner ends of each pair of pin clips (13-20; 31). 509837/0331 24. Lens according to claim 12, characterized by a plurality of drainage holes (21-24) in the area between the Splash (12; 35) and the optical zone (11) through the artificial, intraocular lens (10; 30; 40; 60; 110; 125) lead through. 25. Lens according to claim 24, characterized in that the drainage holes (21-24) along the periphery of the optical zone (11) are equally spaced from one another exhibit. 26. Lens according to claim 24, characterized by an insertion loop (50) for holding and handling of the lens (10) during its implantation, wherein the introducer loop (50) consists essentially of a loop (51) and a handle (53), the loop (51) leads through two of the drainage holes (21-24) of the lens (10), so that one loop portion (51A) wraps around the rear surface of the optical zone (11) and the other Section of the loop (50) leads to the handle (53). 27. Lens according to claim 26, characterized in that the portion of the loop (51) of the insertion loop (50) extending to the handle (53) releasably engages at least one of the pin clips (13-20) stands. 28. Lens according to claim 26, characterized in that those drainage holes (21-24) through which the loop (51), are arranged on the periphery of the optical zone (11) and are opposite one another. 509837 / 033-} Blank page