WO2015084282A1

WO2015084282A1 - An intraocular lens

Info

Publication number: WO2015084282A1
Application number: PCT/TR2014/000483
Authority: WO
Inventors: Rifat RASIER
Original assignee: Rasier Rifat
Priority date: 2013-12-02
Filing date: 2014-12-02
Publication date: 2015-06-11

Abstract

The present invention is related to a one-piece intraocular lens (1) comprising optic (11) with a circular middle section, haptic (12) integrated to said optic (11) in the form of extension, tips (121) as a bulging section of said haptic (12), holes (122) formed on said tips (121), and holders (13) passing through said holes (122) and fixing the haptics (12) in the application area, in order to be fixed in the sclera (white section of the eye) that is the application area in the eye by being inserted through an opening formed with the joining of cornea-sclera and without suture.

Description

AN INTRAOCULAR LENS Technical Field

The present invention is related to an intraocular lens.

The present invention is especially related to an intraocular lens that is easy to be applied without fixation by means of suture.

State of Art

Today, one of the most vital stages of cataract surgery is the implantation of intraocular lens (IOL). Although today's surgery methods have improved, the insufficiency of lens posterior capsule support due to traumatic cataracts especially, and diseases leading to phacodonesis and lens luxation makes the posterior chamber IOL implantation impossible. Therefore, anterior chamber IOL implantation and scleral fixated posterior chamber intraocular lens implantation create alternative surgery options in said cases. Thanks to its better refractive features, scleral fixated posterior chamber intraocular lens implantation have been preferred more than anterior chamber intraocular lens implantation in recent years.

The present scleral fixation lenses have suture applications. Said suture poses infection risk and extends the operation period, the operator is required to have a high level of experience and much more incision sutures must be applied on the eye in order to fix the intraocular lens into the eye. The recovery period of the patient after the operation is longer.

In the present applications, there are two holes in the haptics of IOL, namely in the struts; sutures, namely the stitches, are passed through the holes and thus, IOL is implanted in the sclera, namely the white section of the eye. For said process, the suture applied, namely the suture node is required to be preserved; otherwise, it leads to irritation and the suture is ruptured. Therefore, scleral flaps are raised at two 180-degree reciprocal sides of the eye and pocket is formed, said scleral flaps are sutured on themselves. In our invention, scleral pocket and IOL suturation are not required. If desired, IOL haptics fixated without suture can be preserved under the scleral flap. Moreover, the suture in IOL haptic fixed by means of present technology weakens after ten years later and is ruptured. The fixed IOL is dislocated due to the ruptured suture and even, IOL falls behind the eye and as a result, a serious vision loss is experienced.

Different methods have been developed in the transscleral fixated posterior chamber lens applications in the eyes without posterior capsule and thus, the complications of the patients in the postoperative period have been tried to be minimized.

Kaynak et al. (Ref. 1) have used foldable lens for this aim and therefore, they have both minimized postoperative astigmatism by performing the operation with a small incision that does not require suture afterwards and eliminated the possible risks such as hypotony and suprachoroidal hemorrhage as they have performed the operation in a relatively closed system thanks to the anterior chamber provider.

Kapran et al. (Ref. 2) have reported the method of two-point transscleral intraocular lens fixation from single scleral flap, which they have prepared on the upper eye quadrant and they have also indicated that it is a method that shortens the operation period when compared to double flap, is easy to be applied, provides better lens fixation and preserves the sutures better than the horizontal flap. Single suture fixated posterior chamber lens application in which one haptic of the lens is attached to sulcus and the other strut is attached to sclera, has been reported in the cases in which capsule support is lost in a limited manner (Ref. 3).

Baykara et al. have recommended the sutures to be embedded in the sclera during the operation (Ref. 4-6) and then, they have reported that they used the method of etching with laser and embedding under the sclera and dura mater in the treatments of suture ends emerging on the conjunctiva (Ref. 6).

Four-point sclera fixation method has also been recommended for a better lens centralization (Ref. 7). As a result, it has been observed in the studies that the suture method applied for scleral fixation leads to vital problems. Many studies making use of tissue glue instead of suture have been performed, but the results have not been approved completely due to both toxic effects and insufficiencies of glues. (Ref.8,9)

The invention included in the state of art, numbered WO 2000/022459 and titled "Injectable intraocular lenses" is related to polysiloxanes suitable for the preparation of intraocular lenses by a cross-linking reaction; they have a specific gravity of greater than 1.0, comprise a refractive index suitable for restoring the refractive power of the natural crystalline lens and a viscosity suitable for injection through a standard cannula. The present invention includes an injectable intraocular lens material based on said polysiloxanes and methods of preparing intraocular lenses by direct injection into the capsular bag of the eye. Again, the invention numbered TR 2006/03244 and titled "One-piece soft foldable lens, the optic and haptic of which are made of same material by means of photopolymerization technology" is an intraocular lens comprising optic section and haptic section; said optic and haptic sections are produced in one piece by means of photopolymerization method from the copolymer material based on methacrylic oligomers without additional UV absorbers. The intraocular lens according to the invention is produced by means of photopolymerization technology. The production technology is based on the principle that polymeric material is dosed in the molds and then, subjected to UV light at a certain wave length, and polymerization reaction is performed.

Again, the invention numbered EP1653886B1 and titled "Intraocular lens system" is related to a two part lens system. The first part is a ring-like supporting component that is implanted in the capular bag following cataract surgery. The first component is a non-optical component and contains a pair of haptics for fixating the first component within the capular bag and the second component is an optical component that contains all of the corrective optical power of the lens system. The second component has a pair of tabs for locking the second component within the first component. The invention numbered EP1610726B1 and titled "Intraocular lens and injector for the same" relates to an injectable intraocular lens made of a flexible material and comprises an optic which preferably has an approximately circular shape, characterized in that said lens comprises two lateral flat sections on two opposing sides of the optic and said flat section (15) form an angle with each other.

The invention numbered EP1933768B1 and titled "Accommodative intraocular lens system" is a two-optic accommodative lens system. The present invention also aims the use of a cam mechanism to adjust the distance power via adjustment of the dual lens separation when the eye is at distance vision stasis. The cam mechanism allows for distance/base power ad adjustment as needed.

Objects of the Present Invention

In order to eliminate the disadvantages of the state of art, an object of the present invention is not to require fixation with suture. Suture irritation, suture infection and foreign body reaction may be included in the suture based complications. Moreover, suture and scleral pocket require a serious experience and talent for the doctor and this new application is easy to be applied and has a rapid learning curve when compared to the current application. In addition, IOL is not removed as the suture is ruptured or melts after years, because fixation with suture is not performed in the new method; and thus, the need for a second operation is eliminated completely.

The time for the operator to fix the lens in the eye is shortened. Therefore, operation period is shortened. The same treatment is applied for each patient as the lens has standard parts. The simplicity of the product is important. Operation without suture is performed by means of fewer and smaller incisions.

The product in our invention enables IOL to be fitted in the eye with a 3.2 mm fixed incision opened on cornea in the eye; therefore, the previous lOLs are not foldable and thus, larger incisions are opened.

Thanks to the present invention, vision is achieved by treating the refractivity, astigmatic risk is minimized, lens focus is not spoiled as the suture is not ruptured after a certain period of time, because suture is not needed, and greater deformation does not occur as scleral pocket is not opened.

In order to achieve the abovementioned advantages, the present invention is a one- piece intraocular lens comprising optic with a circular middle section, haptic integrated to said optic in the form of extension, tips as a bulging section of said haptic, holes formed on said tips, and holders passing through said holes and fixing the haptics in the application area, in order to be fixed in the sclera (white section of the eye) that is the application area in the eye by being inserted through an opening formed with the joining of cornea-sclera and without suture.

Description of the Figures

Figure 1 is the overall perspective view of the intraocular lens according to the present invention.

Description of the Part References

Detailed Description of the Invention

The present invention will be used for fixing the intraocular lens (1 ) in the white section of eye, namely sclera, in the cases that the lens in the eye is removed and there is not enough capsule tissue for inserting intraocular lens (IOL) (1 ) instead. Thanks to intraocular lens (1 ) according to the present invention, the intraocular lens (1) will be fixed to sclera without suture and thus, refractivity will be treated without using external glasses or contact lens. Figure 1 is the overall perspective view of the one-piece intraocular lens (1) according to the present invention. According to the figure, the middle section of intraocular lens (1 ) according to the present invention is optic (11) with a circular form. Said optic (1 1 ) preferably comprises 2, 3 and 4 haptics (12) that are integrated and in the form of extension. Haptics (12) are formed with a straight angle to the optic (1 1 ) in the form of thin long lens strut and with equal angles of 120° therebetween.

Said haptic (12) has holes (122) on the tips (121) with bulging form. The holders (13) passing through said holes (122) are fixed to the application area of intraocular lens (1 ). Said holders (13) are cambered at both tips.

After the intraocular lens (1 ) according to the present invention is inserted in the eye, 3 haptics (12) are captured with a surgical tool through the holes (121 ) and pulled to the required area and then, fixed to sclera with holders (13) that are cambered at both tips. Said surgical tool is designed in the form of hook preferably. In order to fit the intraocular lens (1) into the eye through the joining section of cornea-sclera, the uppermost layer, namely conjunctiva, is opened with scissors and a thin opening is achieved in sclera. Leakage is not experienced in said opening, as it is formed in an angular and bevelled manner. Fixing the tips (121 ) of haptics (12) exerted through said opening, to sclera, namely the white section of the eye, is the most important feature of the present invention, which distinguishes said invention from the previous methods. Preferably, 3 haptics (12) are fixed to sclera by means of holders, both tips (121 ) of which have a small bulging rod form. Finally, three haptics (12) of intraocular lens (1 ) are fixed. Then, the opened outmost thin layer; namely conjunctiva is closed and operation is completed.

In another application, if irritation is experienced in conjunctiva, the same lens (1) is fixed to sclera by forming scleral pocket without using suture.

Claims

1. A one-piece intraocular lens (1) in order to be fixed in the sclera (white section of the eye) that is the application area in the eye by being inserted through an opening formed with the joining of cornea-sclera and without suture, characterized in comprising;

- optic (1 1) with a circular middle section,

- haptic (12) integrated to said optic (11) in the form of extension,

- tips (121 ) as a bulging section of said haptic (12),

- holes (122) formed on said tips (121 ),

- holders (13) passing through said holes (122) and fixing the haptics in the application area.

2. The one-piece intraocular lens (1) according to Claim 1 , and characterized in that said optic (1 1) comprises preferably 3 one-piece haptics (12).

3. The one-piece intraocular lens (1 ) according to Claims 1 and 2, and characterized in that said haptic (12) is formed with a straight angle to the optic (11).

4. The one-piece intraocular lens (1) according to Claims 1 , 2 and 3, and characterized in that said haptics (12) are formed in the form of thin long lens strut and with equal angles of 120° therebetween.

5. The one-piece intraocular lens (1) according to Claim 1 , characterized in that both tips of said holders (13) are cambered.