FR2837694A1 - Intra-ocular tensioning ring for correcting presbyopia is made from biocompatible material with shape memory effect, and has variable diameter - Google Patents
Intra-ocular tensioning ring for correcting presbyopia is made from biocompatible material with shape memory effect, and has variable diameter Download PDFInfo
- Publication number
- FR2837694A1 FR2837694A1 FR0203727A FR0203727A FR2837694A1 FR 2837694 A1 FR2837694 A1 FR 2837694A1 FR 0203727 A FR0203727 A FR 0203727A FR 0203727 A FR0203727 A FR 0203727A FR 2837694 A1 FR2837694 A1 FR 2837694A1
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- France
- Prior art keywords
- ring according
- tension ring
- intraocular tension
- ring
- zonules
- Prior art date
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- Granted
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- MOCKRCVLUDSSFF-UHFFFAOYSA-N CC[N]1(CC1)C(C)C Chemical compound CC[N]1(CC1)C(C)C MOCKRCVLUDSSFF-UHFFFAOYSA-N 0.000 description 1
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
- A61F2/147—Implants to be inserted in the stroma for refractive correction, e.g. ring-like implants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
- A61F2230/0006—Rounded shapes, e.g. with rounded corners circular
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Transplantation (AREA)
- Biomedical Technology (AREA)
- Vascular Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Ophthalmology & Optometry (AREA)
- Cardiology (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dermatology (AREA)
- Medicinal Chemistry (AREA)
- Epidemiology (AREA)
- Prostheses (AREA)
Abstract
Description
(10). La présente invention a pour objet un anneau de tension intra(10). The subject of the present invention is an intra tension ring
oculaire pour la correction de la presbytie. Elle se rapporte d'une manière générale aux implants destinés à être mis en place par voie chirurgicale à l'intérieur du globe oculaire en vue de corriger eyepiece for the correction of presbyopia. It generally relates to implants intended to be placed surgically inside the eyeball in order to correct
des déficiences du système optique de celui-ci. deficiencies in the optical system thereof.
L'oeil humain est un organe creux limité de l'extérieur vers l'intérieur par trois membranes: la sclérotique ou sclère 1, protectrice, formant en avant la co rnée 2 tra nsparente; la tu n iq ue uvéa le, ou uvée, g rou pant la chorofde 3, en arrière, pigmentée et nourricière, se prolongeant successivement en avant par le corps s ciliaire 4 et 1'iris 5, percé de la pupille 6 à ouverture variable; la rétine 7, tapissant la choroide, couche neurosensorielle se prolongeant par le nerf optique 8 et sur laquelle se dessinent les images formées par les rayons lumineux traversant les milieux transparents successifs de l'oeil, à savoir la cornée 2, I'humeur aqueuse 9, The human eye is a hollow organ bounded from the outside to the inside by three membranes: the sclera or sclera 1, protective, forming in front the transparent cornea 2; tu n iq ue uvéa le, or uvée, g rou pant chorofde 3, behind, pigmented and nourishing, extending successively forward by the ciliary body 4 and the iris 5, pierced with the pupil 6 with variable opening ; the retina 7, covering the choroid, the sensorineural layer extending by the optic nerve 8 and on which the images formed by the light rays drawn through the successive transparent media of the eye, namely the cornea 2, the aqueous humor 9 are drawn ,
le cristallin 10 et le vitré 11 également appelé humeur vitreuse (figure 1). the crystalline lens 10 and the vitreous 11 also called vitreous humor (FIG. 1).
Le cristallin, lentille bi-convexe transparente, sépare l'iris et le vitré. The lens, a transparent bi-convex lens, separates the iris and the vitreous.
Il est maintenu en place par les fibres zonulaires 12, série de fibres amarrées au corps ciliaire. Ce dernier consiste en un épaississement de l'uvée situé en couronne derrière l'iris et formant derrière ce dernier un sillon désigné généralement par le s terme latin suicus. Le corps ciliaire contient des vaisseaux sanguins et des fibres musculaires lisses radiaires ou circulaires qui jouent un rôle essentiel dans l'accommodation de l'oeil à la vision rapprochée, en faisant varier la convergence du It is held in place by the zonular fibers 12, a series of fibers moored to the ciliary body. The latter consists of a thickening of the uvea located in a crown behind the iris and forming behind the latter a groove generally designated by the Latin term s suicus. The ciliary body contains blood vessels and smooth radiator or circular muscle fibers which play an essential role in accommodating the eye to close vision, by varying the convergence of the
cristallin, par l'intermédiaire des fibres constituant la zonule. crystalline, through the fibers constituting the zonule.
o La propriété essentielle du cristallin est son élasticité qui autorise une modification des rayons de courbures lors de l'accommodation via l'action des o The essential property of the lens is its elasticity which allows a modification of the radii of curvature during accommodation via the action of
zonules, propriété qui s'amenuise avec l'âge: c'est la presbytie. zonules, a property that diminishes with age: this is presbyopia.
- 2837694- 2837694
Avec l'âge en effet, le cristallin naturel, d'origine ectodermique, voit son épaisseur augmenter et son diamètre s'agrandir d'environ 20 microns par an, ce qui entrane une diminution de la distance séparant l'équateur du cristallin et le corps ciliaire et par conséquent une distension des fibres zonulaires. De surcro^'t, le noyau devient également plus dur ce qui a pour effet de rendre le cristallin moins déformable. C'est la combinaison de ces deux phénomènes qui fait qu'il y a perte d'accommodation. Helmholtz, physicien et physiologiste allemand du XlXe siècle o affirmait que la contraction du muscle ciliaire entrane une relexation zonulaire qui induirait une diminution du rayon de courbure du cristallin donc une augmentation With age, in fact, the natural lens, of ectodermal origin, sees its thickness increase and its diameter grow by about 20 microns per year, which leads to a decrease in the distance separating the equator from the lens and the ciliary body and consequently a distension of the zonular fibers. In addition, the core also becomes harder which has the effect of making the lens less deformable. It is the combination of these two phenomena that causes loss of accommodation. Helmholtz, German physicist and physiologist of the XIXth century o affirmed that the contraction of the ciliary muscle causes a zonular relexation which would induce a reduction in the radius of curvature of the lens therefore an increase
de sa puissance.of his power.
Aujourd'hui, au terme de nombreuses études sur le sujet, il s'avère que la théorie de Helmholtz a été retenue par l'ensemble des spécialistes de s l'ophtalmologie pour expliquer le mécanisme accommodatif. Les figures 2 à 4 décrivent la perte de pouvoir accommodatif via la théorie de Helmholtz: - Dans la vision de loin (figure 2), le muscle ciliaire 4 est relâché, les zonules 12 tendues et la surface antérieure du cristallin 10 est allongée (grand rayon de courbure), entranant une faible puissance visuelle réfractive, alors que pour la vision de près (figure 3), le muscle ciliaire est en contraction, les zonules relâchées et la surface antérieure du cristallin arrondie (petit rayon de courbure), entranant une forte puissance visuelle réfractive (il a été montré que la courbure de la face postérieure du cristallin naturel ne varie quasiment pas au cours de l'accommodation). - Avec l'âge, les zonules 12 restent relâchées même lorsque le muscle ciliaire 4 est lui-même relâché, et la surface antérieure du cristallin est Today, after numerous studies on the subject, it turns out that Helmholtz's theory has been retained by all specialists in ophthalmology to explain the accommodative mechanism. Figures 2 to 4 describe the loss of accommodative power via Helmholtz's theory: - In far vision (Figure 2), the ciliary muscle 4 is relaxed, the zonules 12 stretched and the anterior surface of the lens 10 is elongated (large radius of curvature), causing a weak refractive visual power, while for near vision (Figure 3), the ciliary muscle is in contraction, the zonules relaxed and the anterior surface of the lens crystallized (small radius of curvature), causing a strong refractive visual power (it has been shown that the curvature of the posterior surface of the natural lens does not vary almost during accommodation). - With age, the zonules 12 remain relaxed even when the ciliary muscle 4 is itself relaxed, and the anterior surface of the lens is
arrondie, le rayon de courbure de la face antérieure du cristallin est faible (figure 4). rounded, the radius of curvature of the anterior surface of the lens is small (Figure 4).
o L'auteur de la présente invention a déposé le 21/06/1999 un brevet français publié sous le numéro FR 2 794 965 qui décrit un anneau ou dispositif sensiblement circulaire à effet ressort mis en place par chirurgie intra-oculaire dans le suicus ciliaire, en arrière de l'iris, et déterminé de façon à compenser la tension des fibres zonulaires perdue par l'augmentation du diamètre du cristallin se o The author of the present invention deposited on 21/06/1999 a French patent published under the number FR 2 794 965 which describes a ring or substantially circular device with spring effect put in place by intraocular surgery in the ciliary suicus , behind the iris, and determined so as to compensate for the tension of the zonular fibers lost by the increase in the diameter of the lens
À 2837694To 2837694
produisant généralement au cours du vieillissement en provoquant une diminution generally occurring during aging by causing a decrease
progressive de l'amplitude d'accommodation de l'oeil. progressive amplitude of accommodation of the eye.
Le nouveau concept exposé dans le présent document s'inscrit dans le prolongement de ce brevet. De même que le dispositif objet de ce document, il permet au cristallin, en retendant les fibres de la zonule, de retrouver partiellement son pouvoir accommodatif. En effet, les propriétés mécaniques des zonules et la contraction du muscle ciliaire n'ont pas changé, or le cristallin est plus dur, donc même en restaurant complètement la tension des zonules, on ne pourra jamais recouvrer complètement le pouvoir accommodatif. De plus, le nouveau dispositif o prend également en compte l'augmentation graduelle du diamètre du cristallin sans The new concept presented in this document is an extension of this patent. Like the device that is the subject of this document, it allows the lens, by tightening the fibers of the zonule, to partially regain its accommodative power. Indeed, the mechanical properties of the zonules and the contraction of the ciliary muscle have not changed, but the lens is harder, so even by completely restoring the tension of the zonules, we will never be able to completely recover the accommodative power. In addition, the new device o also takes into account the gradual increase in the diameter of the lens without
se soucier de l'état de relâchement initial des zonules. worry about the initial loosening of the zonules.
Afin de conserver un effet dans le temps, il est nécessaire de In order to maintain an effect over time, it is necessary to
retendre au départ plus que nécessaire. retighten at the start more than necessary.
Le dispositif selon l'invention est constitué d'un anneau ouvrable sensiblement circulaire à diamètre réglable, en matériau à mémoire de forme, mis en place par chirurgie intra-oculaire et inséré directement dans la zonule de façon à compenser la tension des fibres zonulaires perdue par l'augmentation du diamètre The device according to the invention consists of a substantially circular opening ring with adjustable diameter, of shape memory material, placed by intraocular surgery and inserted directly into the zonule so as to compensate for the tension of the lost zonular fibers. by increasing the diameter
du cristallin due au vieillissement. of the lens due to aging.
Sur les dessins schématiques annexés, donnés à titre d'exemples non limitatifs de formes de réalisation de l'objet de l'invention: la figure 1, déjà citée est une coupe antéro-postérieure verticale d'un globe oculaire, les figures 2, 3 et 4, également mentionnées plus haut, illustrent l'accommodation visuelle respectivement d'un oeil normal (fig. 2, 3) et de 1'oeil d'une personne âgée (figure 4), ies figures 5 et 6 sont des coupes axiales partielles du cristallin montrant le positionnement de l'anneau intra-oculaire selon l'invention dans les so zonules, respectivement avec muscle ciliaire relâché et zonules tendues (figure 5), et avec muscle ciliaire contracté et zonules relâchées (Figure 6) les figures 7 et 8 représentent, vues en plans, deux variantes In the appended schematic drawings, given by way of nonlimiting examples of embodiments of the subject of the invention: FIG. 1, already cited, is a vertical anteroposterior section of an eyeball, FIGS. 2, 3 and 4, also mentioned above, illustrate the visual accommodation respectively of a normal eye (fig. 2, 3) and of the eye of an elderly person (figure 4), the figures 5 and 6 are sections partial axial of the lens showing the positioning of the intraocular ring according to the invention in the so zonules, respectively with relaxed ciliary muscle and taut zonules (FIG. 5), and with contracted ciliary muscle and relaxed zonules (FIG. 6) the figures 7 and 8 show, in plan views, two variants
d'exécution d'anneaux de tension conformes à l'invention. execution of tension rings according to the invention.
la figure 9 est un agrandissement du détail D1 de la figure 7 et la figure 10 est une coupe axiale partielle d'un anneau de tension dont la périphérie est en forme de peigne pour améliorer son insertion dans les fibres zonulaires. s Le dispositif, figures 5 à 10, est constitué d'un implant intra-oculaire en forme d'anneau 13 présentant la particularité d'être inséré directement parmi les fibres de la zonule 12 de façon à exercer sur celles-ci une tension agissant sur la Figure 9 is an enlargement of the detail D1 of Figure 7 and Figure 10 is a partial axial section of a tension ring whose periphery is comb-shaped to improve its insertion into the zonular fibers. s The device, FIGS. 5 to 10, consists of an intraocular implant in the form of a ring 13 having the particularity of being inserted directly among the fibers of the zonule 12 so as to exert on them a tension acting on the
périphérie du cristallin 10 pour augmenter son diamètre. periphery of the lens 10 to increase its diameter.
Alors que le brevet antérieur portait sur un anneau de suicus qui permettait de retendre indirectement les zonules par une action sur le muscle ciliaire grâce à un effet ressort, le concept de ce nouvel anneau est basé sur une action directe sur les zonules 12, toujours dans le but de compenser la perte de tension des While the previous patent related to a suicus ring which made it possible to indirectly tighten the zonules by an action on the ciliary muscle thanks to a spring effect, the concept of this new ring is based on a direct action on the zonules 12, still in the purpose of compensating for the loss of tension in
s fibres zonulaires liée au vieillissement du patient. s zonular fibers linked to the patient's aging.
La figure 5 montre l'action directe sur les fibres zonulaires d'un Figure 5 shows the direct action on the zonular fibers of a
anneau 13 selon l'invention.ring 13 according to the invention.
Afin de compenser la perte de tension des zonules 12 de manière o précise, I'anneau 13 comporte un système de réglage de diamètre pouvant consister par exemple en une gaine 14 fixée à l'une des extrémités de l'anneau 13 et pourvue de crans internes permettant de régler la position de la seconde extrémité (figures 7 et 9). Le système de réglage peut également être constitué d'un dispositif à trois poulies solidaires l'anneau comportant une extrémité fixe 16 maintenue sur l'une des In order to compensate for the loss of tension of the zonules 12 in a precise manner, the ring 13 comprises a diameter adjustment system which can consist, for example, of a sheath 14 fixed to one end of the ring 13 and provided with notches internal to adjust the position of the second end (Figures 7 and 9). The adjustment system can also consist of a device with three pulleys integral with the ring comprising a fixed end 16 held on one of the
s poulies et une extrémité mobile 17 passant entre les deux autres poulies (figure 8). s pulleys and a movable end 17 passing between the two other pulleys (Figure 8).
La périphérie extérieure de l'anneau 13 sera avantageusement pourvue de picots, d'une structure en forme de peigne 18 (figure 10) ou de toute autre géométrie particulière afin d'améliorer l'insertion de l'anneau dans les fibres The outer periphery of the ring 13 will advantageously be provided with pins, a comb-shaped structure 18 (FIG. 10) or any other particular geometry in order to improve the insertion of the ring into the fibers.
zonulaires.zonular.
L'anneau 13 est réalisé dans un matériau à mémoire de forme suffisante pour exercer un effet ressort et revenir à un état vision de loin (avec zonules tendues) depuis un état vision de près (avec contraction du muscle ciliaire The ring 13 is made of a memory material with sufficient shape to exert a spring effect and return to a far vision state (with taut zonules) from a near vision state (with contraction of the ciliary muscle
et zonules relâchées).and zonules released).
Il peut être fabriqué en PMMA, en acrylique hydrophile ou tout autre matériau biocompatible ayant une mémoire de forme suffisante. Il peut également s être réalisé en utilisant une technologie matériau dur/matériau.souple, type "Flexizone", le matériau souple étant greffé sur la périphérie externe d'un anneau réalisé en matériau dur afin de minimiser la pression de contact en augmentant les It can be made of PMMA, hydrophilic acrylic or any other biocompatible material with sufficient shape memory. It can also be produced using a hard material / flexible material technology, of the "Flexizone" type, the flexible material being grafted onto the external periphery of a ring made of hard material in order to minimize the contact pressure by increasing the
zones en contact avec les tissus. Signalons que l'inverse est également réalisable. areas in contact with tissue. Note that the opposite is also possible.
o Le position nement des divers éléments constitutifs don ne à l'objet de l'invention un maximum d'effets utiles qui n'avaient pas été, à ce jour, obtenus par o The positioning of the various constituent elements does not give the object of the invention a maximum of useful effects which had not, to date, been obtained by
des dispositifs similaires.similar devices.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0203727A FR2837694B1 (en) | 2002-03-26 | 2002-03-26 | INTRAOCULAR TENSION RING FOR THE CORRECTION OF PRESBYOPIA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0203727A FR2837694B1 (en) | 2002-03-26 | 2002-03-26 | INTRAOCULAR TENSION RING FOR THE CORRECTION OF PRESBYOPIA |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2837694A1 true FR2837694A1 (en) | 2003-10-03 |
| FR2837694B1 FR2837694B1 (en) | 2005-05-13 |
Family
ID=27839183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0203727A Expired - Fee Related FR2837694B1 (en) | 2002-03-26 | 2002-03-26 | INTRAOCULAR TENSION RING FOR THE CORRECTION OF PRESBYOPIA |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2837694B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7060094B2 (en) * | 2000-08-07 | 2006-06-13 | Ophthalmotronics, Inc. | Accommodating zonular mini-bridge implants |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000040174A1 (en) * | 1998-12-31 | 2000-07-13 | Societe Medicale De Precision S.M.P. Sa | Device for treating presbyopia or other ocular disorder |
| FR2794965A1 (en) * | 1999-06-21 | 2000-12-22 | Ioltechnologie Production | Intra-ocular tension ring for correction of presbyopia has ring fitting in ciliary sulcus to compensate for lend diameter increase |
| DE19951148A1 (en) * | 1999-10-12 | 2001-04-19 | Technomed Ges Fuer Med Und Med | Eyeball clamping ring for use during cataract surgery has a curved and elastic element with the ends locked together to remain as an implant to support the fiber tissue |
-
2002
- 2002-03-26 FR FR0203727A patent/FR2837694B1/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000040174A1 (en) * | 1998-12-31 | 2000-07-13 | Societe Medicale De Precision S.M.P. Sa | Device for treating presbyopia or other ocular disorder |
| FR2794965A1 (en) * | 1999-06-21 | 2000-12-22 | Ioltechnologie Production | Intra-ocular tension ring for correction of presbyopia has ring fitting in ciliary sulcus to compensate for lend diameter increase |
| DE19951148A1 (en) * | 1999-10-12 | 2001-04-19 | Technomed Ges Fuer Med Und Med | Eyeball clamping ring for use during cataract surgery has a curved and elastic element with the ends locked together to remain as an implant to support the fiber tissue |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7060094B2 (en) * | 2000-08-07 | 2006-06-13 | Ophthalmotronics, Inc. | Accommodating zonular mini-bridge implants |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2837694B1 (en) | 2005-05-13 |
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