EP0863730A1 - Implant intraoculaire souple - Google Patents
Implant intraoculaire soupleInfo
- Publication number
- EP0863730A1 EP0863730A1 EP96938268A EP96938268A EP0863730A1 EP 0863730 A1 EP0863730 A1 EP 0863730A1 EP 96938268 A EP96938268 A EP 96938268A EP 96938268 A EP96938268 A EP 96938268A EP 0863730 A1 EP0863730 A1 EP 0863730A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical part
- implant
- diameter
- contact portion
- implant according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
- A61F2/16—Intraocular lenses
- A61F2/1613—Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
- A61F2/1616—Pseudo-accommodative, e.g. multifocal or enabling monovision
Definitions
- Intraocular implants are corrective systems for human vision that can, in a number of cases, replace contact lenses or external corrective lenses. In other cases, these implants can be combined for example with corrective lenses to obtain a suitable vision correction.
- An intraocular implant essentially consists of an optical part of generally circular or slightly oval shape which forms the corrective optical system itself. It also includes a haptic part which is used for positioning and fixing the optical part inside the eye in the suitable position.
- cataract operation is now most often performed using the operating technique known as phacoemulsification.
- This technique allows the ablation of the opaque lens by the introduction into the eye of an ultrasound probe with an irrigation / aspiration system.
- the lens is removed by emulsification.
- This operating technique has the advantage over previous techniques of requiring only the making of an incision of reduced size in the cornea to introduce into the eye the material necessary for this ablation. It is therefore understood that it is advantageous to have intraocular implants which can be introduced into the interior of the eye and placed by the reduced-size incision which is only necessary during the ablation operation. of the lens. With the implants which are most often currently developed and which are produced in PMMA, that is to say in a rigid material, whatever the precautions taken for the realization of the haptic parts, the incision must necessarily have a dimension sufficient to allow at least the optical part of the implant, the diameter of which is around 6mm, to pass.
- the production of the haptic part of the implant raises particular problems for ensuring proper fixation and positioning of the implant inside the eye, especially when this implant is placed in the capsular bag. It is understood in particular that it is necessary for the haptic part to develop a sufficient holding force in order to avoid the risks of ejection of the implant from the capsular bag.
- European patent application 579 528 describes several types of flexible implants implantable in the posterior chamber.
- each fixing element comprises a contact portion 16 in the form of a semicircle. intended to come into contact with the internal wall of the eye and, more precisely, with the capsular bag, this contact portion 16 being connected to the periphery of the optical part 10 by two arms 18 and 20 which thus define them, in each fastening element, a window 22 of relatively large dimension.
- Such an implant effectively keeps it in place in the capsular bag effectively, avoiding the risks of ejection of the latter out of the capsular bag.
- the implant is made of a flexible material such as hydrogel
- the implant is introduced into the eye through an incision after this implant has been folded in. two, as shown schematically in Figure lb.
- the folded implant is held in this position using a surgical instrument 24 in the form of a clamp, the ends of the branches of the clamp such as 26 having three points of contact or clamping 28, 30 and 32.
- the contact points 28 and 32 of the surgical instrument hold poorly or do not maintain at all, in folded form, the fastening elements of the haptic part.
- these are relatively free during implantation of the implant in the eye, which, on the one hand, makes it more difficult for the implant to pass through the incision made in the cornea and, on the other hand, risks causing the contact portions 16 to break.
- the contact portion 16 having a length greater than that of the diameter of the optical part 10, the size of the implant once folded still remains relatively large during its passage through the incision made in the cornea.
- An object of the present invention is to provide an intraocular implant made of a flexible material which has characteristics such that its implantation in the eye, in particular using the tool defined above is facilitated while ensuring the same quality of maintenance of the implant in the eye after its placement.
- the monobloc intraocular implant made of a flexible material and comprising a substantially circular optical part and a haptic part consisting of two fixing elements diametrically opposite with respect to said optical part, each fixing element comprising a contact portion intended to come into contact with the internal wall of the eye and means for connecting said contact portion to the periphery of said optical part, said contact portions having the shape of an arc of circle having substantially the same center as the optical part, is characterized in that the rope supporting each contact portion has a length substantially equal to the diameter of the optical part, in that each of the connection means has the shape of a veil non-perforated extending between said contact portion and the periphery of said optical part, said veil being limited by edges having the shape of a curve with regular curvature, each curve extending between one end of the contact portion and a point on the periphery of the optical part, the two points of the edges of the veil situated on the same perpendicular to the axis of symmetry of the
- each web connecting the contact portion to the periphery of the optical part has at least one portion whose width is reduced compared to that of the contact portion and the optical part, effectively obtains, at each contact portion, an anchoring effect between the front and rear walls of the capsular bag after the implant has been placed, which ensures that the implant is maintained in the capsular bag.
- the optical part of the implant is limited by two surfaces, respectively anterior and posterior, in the form of spherical caps each bounded by a circle, the circle of the anterior surface having a diameter less than that of the posterior surface.
- this arrangement makes it possible to reduce the thickness of the optical part in its thickest zone, that is to say that corresponding to its optical axis while maintaining the same curvature of the rear face of the optical part. Better folding qualities of the optical part are thus obtained, due to the reduction in its thickness while maintaining the same quality of contact of the posterior face of the implant on the posterior wall of the capsular bag.
- FIG. 2a is a front view of a flexible implant according to the invention.
- FIG. 2b is a side view of the implant of Figure 2a; and - Figure 3 is a schematic side view of the implant showing the method of geometric definition of the fastening elements of the haptic part of the implant.
- the implant is constituted by a substantially circular optical part 50 and by a haptic part constituted by two fixing elements 52 and 54 arranged substantially diametrically opposite with respect to the optical part 50.
- XX the center of the optical part
- YY' the axis of symmetry of the implant along the direction of the fastening elements 52, 54
- ZZ ′ the axis of revolution of the optical part of the implant 50.
- the two fixing elements 52 and 54 being identical, the fixing part 52 will only be described in detail.
- the implant is preferably made in hydrogel.
- This consists of a contact portion 56 having the general shape of an arc of a circle with center O and diameter DI.
- the cord C which supports the fixing portion 56 has a length substantially equal to the diameter D of the optical part.
- the edge 56a of the contact portion is rounded in cross section.
- the contact portion 56 is connected to the periphery 50a of the optical part by two assemblies in the form of a non-perforated veil 58 which therefore extend from the periphery 50a of the optical part to the contact portion 56.
- This veil is limited by two edges respectively 60 and 62 which each have the shape of a curve having a regular curvature.
- each curve defining an overhang 60, 62 is preferably connected tangentially to the periphery 50a of the optical part and it is connected by a bent portion 64 to the contact portion 56.
- the variable radius of curvature of the edges 60, 62 is such that, between the contact portion and the periphery of the optical part, the length 1 between two points PI and P2, edges of one of the webs 58 is less than the diameter D of the optical part.
- the angle at the center a corresponding to the two points P'1 and P'2 for connection to the periphery 50a of the optical part is less than 180 degrees but greater than 90 degrees. This angle can advantageously be between 110 and 130 degrees.
- each web 58 has a thickness which decreases from the contact portion 56 to the periphery 50a of the optical part.
- this figure shows that the diameter D2 of the circle limiting the front diopter 70 in the form of a spherical cap is less than the diameter D3 of the posterior diopter 72 also in the form of a spherical cap.
- This difference in diameter makes it possible, thanks to a larger diameter D3, for the posterior diopter, to ensure good contact between the posterior wall of the capsular bag while reducing the thickness e of the optical part along its axis of revolution ZZ ' .
- D2 is 5.5mm and D3 is 6mm.
- the diameter of the haptic DI is equal to 11mm.
- the thickness E 1 of the contact portion 56 is between 0.4 and 0.5 mm while the thickness E 2 of the web in its zone of connection to the optical part is of the order of 0.2 to 0.25 mm .
- FIG. 3 a description will be given of the mode of definition of the shape of the fastening elements 52 and 54 (anterior face in the case of FIG. 3) is arranged on a portion of toric surface T represented by dotted lines on Figure 3. This tare portion is defined by the rotation of a circle with center 0 'and radius RI around the optical axis ZZ' of the implant.
- the center 0 describes a circle of diameter D4 this circle being centered on the axis ZZ' and arranged in a plane orthogonal to this axis.
- the radius RI is between 5 and 30mm and the diameter D3 is between 5 and 30mm.
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9513385A FR2740969B1 (fr) | 1995-11-13 | 1995-11-13 | Implant intraoculaire souple |
FR9513385 | 1995-11-13 | ||
PCT/FR1996/001751 WO1997017915A1 (fr) | 1995-11-13 | 1996-11-07 | Implant intraoculaire souple |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0863730A1 true EP0863730A1 (fr) | 1998-09-16 |
Family
ID=9484479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96938268A Withdrawn EP0863730A1 (fr) | 1995-11-13 | 1996-11-07 | Implant intraoculaire souple |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0863730A1 (fr) |
JP (1) | JP2000500048A (fr) |
CA (1) | CA2237318A1 (fr) |
FR (1) | FR2740969B1 (fr) |
WO (1) | WO1997017915A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5928282A (en) * | 1997-06-13 | 1999-07-27 | Bausch & Lomb Surgical, Inc. | Intraocular lens |
AU2004229073B2 (en) * | 1999-07-29 | 2006-09-21 | Bausch & Lomb Incorporated | Intraocular lenses |
US6685741B2 (en) | 1999-07-29 | 2004-02-03 | Bausch & Lomb Incorporated | Intraocular lenses |
US9398949B2 (en) * | 2007-01-29 | 2016-07-26 | Emmetropia, Inc. | Intraocular lens system |
CN103655002A (zh) * | 2013-12-13 | 2014-03-26 | 无锡合众信息科技有限公司 | 一种水凝胶人工晶体及其制备方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4298996A (en) * | 1980-07-23 | 1981-11-10 | Barnet Ronald W | Magnetic retention system for intraocular lens |
EP0046338B1 (fr) * | 1980-08-05 | 1985-04-10 | David Peter Choyce | Lentille intraoculaire |
US4562600A (en) * | 1983-10-18 | 1986-01-07 | Stephen P. Ginsberg | Intraocular lens |
US4769035A (en) * | 1987-06-02 | 1988-09-06 | Kelman Charles D | Artificial lens and the method for implanting such lens |
FR2693649B1 (fr) * | 1992-07-16 | 1994-10-14 | Corneal | Implant intra-oculaire souple. |
-
1995
- 1995-11-13 FR FR9513385A patent/FR2740969B1/fr not_active Expired - Fee Related
-
1996
- 1996-11-07 EP EP96938268A patent/EP0863730A1/fr not_active Withdrawn
- 1996-11-07 JP JP9518617A patent/JP2000500048A/ja active Pending
- 1996-11-07 WO PCT/FR1996/001751 patent/WO1997017915A1/fr not_active Application Discontinuation
- 1996-11-07 CA CA 2237318 patent/CA2237318A1/fr not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9717915A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1997017915A1 (fr) | 1997-05-22 |
FR2740969A1 (fr) | 1997-05-16 |
FR2740969B1 (fr) | 1998-02-13 |
JP2000500048A (ja) | 2000-01-11 |
CA2237318A1 (fr) | 1997-05-22 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 19980507 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES GB IT |
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17Q | First examination report despatched |
Effective date: 19991229 |
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GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
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GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20011024 |