CN210494375U

CN210494375U - Additional correction type intraocular lens

Info

Publication number: CN210494375U
Application number: CN201920924266.3U
Authority: CN
Inventors: 姚涛; 王连嵩; 何向东
Original assignee: Shenyang Eye Industry Technology Research Institute Co ltd
Current assignee: Shenyang Baiao Medical Devices Co ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-05-12
Anticipated expiration: 2029-06-19

Abstract

The utility model provides an additional type intraocular lens that follows after, include: the fixing component is used for positioning the optical part; fixed subassembly is joint portion, and joint portion includes: the connecting part and a clamping opening part arranged on the connecting part; the connecting parts are distributed along the outer circumference of the optical part and are connected with the optical part; or, fixed subassembly is the clamping part, and the clamping part includes: a front wing and a rear wing; the front wings are distributed along the outer circumference of the optical part and connected with the optical part, and the rear wings are connected with the inner surface of the optical part, so that the front wings and the rear wings form a wing-shaped bayonet structure; alternatively, the clamping portion includes: a U-shaped groove and a connecting rod; one end of the connecting rod is connected with the U-shaped groove, and the other end of the connecting rod is connected with the optical part; the opening direction of the U-shaped groove is as follows: in the radial direction of the optic and away from the optic. The utility model provides an add type intraocular lens of pursuing to rectify helps the steadiness through fixed subassembly to remaining ametropia or looking near the difficulty behind the intraocular lens implantation operation and following up to rectify.

Description

Additional correction type intraocular lens

Technical Field

The utility model relates to an intraocular lens technical field especially relates to an additional type intraocular lens that follows after.

Background

Intraocular lens structures of conventional design include: the central optic (circular of about 6 mm) acting as a dioptric lens and the haptics (mostly of bilaterally symmetrical design with a total length of about 12mm, C-shaped L-shaped or flat plate type) acting as support at the periphery, after implantation in the lens capsule, support the peripheral part of the capsule with certain elasticity, thus ensuring the centering and stabilization of the optic in the capsule.

Currently, there is a significant portion of the problem of residual partial refractive errors (e.g., myopia, hyperopia, astigmatism) or near vision difficulties in patients following cataract extraction in combination with intraocular lens implantation, for reasons including: the measurement and calculation error of the degree of the artificial lens before the operation, the astigmatism caused by the operation, the design of the implanted artificial lens without correction astigmatism, the design without multi-focus and the like. Existing common solutions include: (1) the correction is carried out by wearing frame glasses, but the frame glasses bring inconvenience to the life of a patient; (2) the replacement of the artificial lens has the problems of complicated operation and serious eye injury, and is difficult to accept by patients; (3) the cornea is cut through the excimer laser surgery for correction, but the surgery is irreversible, and the refractive state of some patients exceeds the laser correction range; (4) another conventional intraocular lens is implanted into the ciliary sulcus for correction (for example, piggyback intraocular lens implantation), but the conventional intraocular lenses are outward extended haptics having a total length of about 12mm except for an optical portion having a size of about 6mm at the center, so that iritis and complications of ocular hypertension are likely to occur due to stimulation of the iris by the haptics, and there is a problem that the position of the lens in the ciliary sulcus is difficult to be stably and centrally positioned.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an add type intraocular lens of correction that pursues helps keeping this add type intraocular lens of correction that pursues's stability through fixed subassembly to remaining ametropia or looking near the difficulty and following up the correction after implanting the artificial crystal.

The utility model provides an additional type intraocular lens that follows after, include: the fixing component is used for positioning the optical part; wherein, fixed subassembly is joint portion, joint portion includes: the connecting part and a clamping opening part arranged on the connecting part; the connecting parts are distributed along the outer circumference of the optical part and are connected with the optical part; alternatively, the fixing assembly comprises at least two clamping portions, each clamping portion comprising: a front wing and a rear wing; the front wings are distributed along the outer circumference of the optical part and connected with the optical part, and the rear wings are connected with the inner surface of the optical part, so that the front wings and the rear wings form a wing-shaped bayonet structure; alternatively, each of the clamping portions includes: a U-shaped groove and a connecting rod; one end of the connecting rod is connected with the U-shaped groove, and the other end of the connecting rod is connected with the optical part; wherein, the opening direction of the U-shaped groove is as follows: in the radial direction of the optical portion and in a direction away from the optical portion.

Optionally, the connection portion is: the cross section of the convex edge extending outwards along the radial direction of the optical part is in an L-shaped structure formed by bending towards the axial direction of the optical part; wherein, the bayonet part is: the clamping jaws are arranged on the end parts of the L-shaped structures and are bent inwards, and the clamping jaws are in arc transition with the connecting surfaces of the L-shaped structures.

Optionally, a first positioning hole is formed in the connecting portion, and the first positioning hole penetrates through the convex edge in an outward inclined manner and extends to the inside of the L-shaped structure.

Optionally, the connection portion is: a ring-like structure projecting inward in the axial direction of the optical portion; the ring-shaped structure and the optical part form a dish-shaped structure; wherein, the bayonet part is: a notch disposed on the ring structure.

Optionally, the additional corrective intraocular lens further comprises: at least two supporting parts, wherein each supporting part is arranged on the outer circumference of the optical part along the radial direction of the optical part and is connected with the optical part; wherein, each supporting part is in a wing-shaped single-plate structure.

Optionally, the curvature of the upper surface of the front wing is consistent with the curvature of the optical part; the rear wing is L-shaped, and the end part of the rear wing is connected with the inner surface of the optical part, so that a space is formed between the front wing and the rear wing.

Optionally, the number of the rear wings is one or more; when the number of the rear wings is multiple, the distance between the end part of each rear wing arranged in parallel and the outer edge of the optical part is gradually increased or decreased, so that the plurality of rear wings are distributed in a stepped manner and are gradually far away from or close to the outer edge of the optical part.

Optionally, the front wing comprises a first front wing and a second front wing with a predetermined spacing therebetween; and the rear wing is provided with a second positioning hole positioned between the first front wing and the second front wing, and the aperture of the second positioning hole is smaller than or equal to the preset distance.

Optionally, a through hole with the diameter of 0.2-0.5 mm is arranged in the center of the optical part.

The utility model has the advantages that: the additional correction type intraocular lens keeps stable in position by clamping the optical part of the original lens or clamping the front capsule opening through the fixing component, thereby performing correction for residual ametropia or myopia difficulty after the implantation of the intraocular lens, effectively solving the problem of ametropia or myopia difficulty, and avoiding inducing symptoms such as iritis, intraocular hypertension complications and the like. Moreover, the structure of the additional correction type intraocular lens can be suitable for the shapes of the capsular bags and the sizes of the diameters of the anterior capsular bag openings of different patients. In addition, the additional correction type intraocular lens is applied in front of the original lens, and the damage to the eyes is small.

Drawings

Figure 1 is an isometric view of a first embodiment of an additional corrective intraocular lens.

Fig. 2 is a top view of a first embodiment of an additional corrective intraocular lens.

Fig. 3 is a sectional view a-a of fig. 2.

Figure 4 is an isometric view of an additional support portion of an embodiment.

Figure 5 is an isometric view of a second embodiment of an additional corrective intraocular lens.

Fig. 6 is a front view of a second embodiment of an additional corrective intraocular lens.

Fig. 7 is a front view of a third embodiment (single posterior wing) of an additional corrective intraocular lens.

FIG. 8 is a side view of an additional corrective intraocular lens embodiment III (single posterior wing) in use.

FIG. 9 is a front view of the third embodiment of the intraocular lens with additional correction (single posterior wing) in application.

Fig. 10 is a cross-sectional view of fig. 9.

Fig. 11 is a front view of a third embodiment (multiple posterior wings) of an add-on corrective intraocular lens.

FIG. 12 is a first view of the application state of the third embodiment (multiple posterior wings) of the intraocular lens with additional correction.

FIG. 13 is a second view of the application of the third embodiment (multiple posterior wings) of the supplemental corrective intraocular lens.

Figure 14 is an isometric view of a fourth embodiment of an additional corrective intraocular lens.

Fig. 15 is a front view of a fourth embodiment of an additional corrective intraocular lens.

Detailed Description

Additional correction type intraocular lenses according to embodiments of the present invention will be described in detail below with reference to fig. 1 to 15.

An embodiment of the utility model provides an add type intraocular lens that follows after, include: the fixing device comprises an optical part (1) and a fixing component for positioning the optical part (1), wherein the fixing component is arranged on the periphery of the outer edge of the optical part (1) and connected with the optical part (1).

The fixing assembly includes: a clamping part (2) or at least two clamping parts (3).

It is to be understood that the additional corrective intraocular lenses of embodiments of the present invention can correct for residual refractive errors or near vision difficulties that exist after implantation of the intraocular lens (i.e., the original lens). The patient can solve the problem of ametropia or myopia difficulty without replacing the implanted original crystal or wearing frame glasses.

As an example, the primary lens may be an intraocular lens implanted in combination with cataract extraction.

In one embodiment, the fixing component is a clamping part (2), namely, the clamping part (2) is arranged on the periphery of the outer edge of the optical part (1) and connected with the optical part (1), and the implanted original crystal is connected (for example, clamped connection and the like) through the clamping part (2), so that the optical part (1) is fixed in front of the implanted original crystal, and the postoperative residual ametropia or the near vision difficulty of the implanted original crystal is corrected.

Preferably, the additional corrective intraocular lens further comprises: the supporting parts (4) are arranged on the periphery of the outer edge of the optical part (1) along the radial direction of the optical part (1) and connected with the optical part (1), and each supporting part (4) is of a wing-shaped single-plate type structure. In this case, the haptic (4) is used to assist the clip (2) in fixing the additional correction intraocular lens, thereby maintaining the stability of the additional correction intraocular lens. For example, each haptic (4) supports the peripheral portion of the capsular bag, thereby assisting in maintaining fixation and stability of the optical portion (1).

In another embodiment, the fixing component comprises at least two clamping parts (3), each clamping part (3) is arranged on the periphery of the outer edge of the optical part (1) and connected with the optical part (1), and the clamping parts (3) clamp the capsule membrane at the edge of the front capsule opening to fix the optical part (1) in front of the implanted original crystal, so that the postoperative residual ametropia or the near vision difficulty of the implanted original crystal can be followed.

The following describes in detail an additional correction type intraocular lens having a "snap-in portion" in conjunction with the first and second embodiments.

The first embodiment.

As shown in fig. 1 to 3, the present embodiment provides an additional correction type intraocular lens comprising: the fixing device comprises an optical part (1) and a fixing component for positioning the optical part (1), wherein the fixing component is a clamping part (2).

The number of the clamping parts (2) is two or more. For example, when the number of the clamping parts (2) is two, the two clamping parts (2) are symmetrically distributed on the outer circumference of the optical part (1) along the radial direction of the optical part (1) and are connected with the optical part (1); when the number of the clamping parts (2) is three, the three clamping parts (2) are uniformly distributed on the outer circumference of the optical part (1) and are connected with the optical part (1).

Each clip portion (2) includes: the connecting part (20) and the clamping opening part (22) are arranged on the connecting part (20), and the connecting part (20) is distributed along the outer circumference of the optical part (1) and is connected with the optical part (1).

As an example, the connection portion (20) is: the cross section of the convex edge (200) extending outwards along the radial direction of the optical part (1) is in an L-shaped structure formed by bending towards the axial direction of the optical part (1). The bayonet part (22) is: an inwardly curved jaw (220) arranged at the end of the L-shaped structure, the jaw (220) being in circular arc transition with the connection face of the L-shaped structure.

The clamping jaws (220) have certain elasticity and are used for ensuring that the stability of the additional correction type intraocular lens is kept after the optical part of the original lens is clamped and not causing excessive pressurization to the original lens. By way of example, the jaw spacing may be set according to the size (e.g., diameter size) of the original lens optic implanted, such as 5.5mm, 5.75mm, 6.0mm, etc.

For example, the claw (220) may be made of PMMA, or may be made of a soft material similar to the optical portion (1).

Preferably, a first positioning hole (221) is arranged on the connecting part (20), the first positioning hole (221) penetrates through the convex edge (200) in an outward inclined mode and extends to the interior of the L-shaped structure, so that a positioning hook can extend into and move the additional correction type intraocular lens, and claw-shaped bayonet structures (namely, clamping parts (2)) are expanded outwards to clamp the original crystal optical part.

As shown in fig. 4, preferably, the additional correction type intraocular lens includes: the optical part (1), the two clamping parts (2) and the two supporting parts (4), wherein each supporting part (4) is symmetrically arranged on the periphery of the outer edge of the optical part (1) along the radial direction of the optical part (1) and is connected with the optical part (1).

As an example, each support (4) is a single-piece plate structure in the form of a wing. In this case, the haptic (4) is used to assist the clip (2) in fixing the additional correction intraocular lens, thereby maintaining the stability of the additional correction intraocular lens.

The additional corrective intraocular lens of this embodiment is more suitable for patients who have no intact anterior capsule or the original lens optic portion that is easily exposed. In use, the spacing model of the fixation assembly is determined (e.g., 5.5mm or 6.0mm, etc.) based on the size of the optical zone of the original lens. When in use, the main incision of the original operation is implanted or a transparent cornea or a corneoscleral incision is additionally prepared, the main incision is naturally unfolded after being implanted into the anterior chamber in the mydriatic state, and the positioning hook extends into the first positioning hole of the fixing component to clamp and fix the additional correction type intraocular lens on the optical part of the original lens. For some cases after the first intraocular lens implantation operation for a long time, for those cases where the anterior and posterior capsule or the anterior capsule is adhered to the optical portion of the original lens, the anterior capsule needs to be separated from the original lens in advance, so that the additional corrective intraocular lens is inserted under the anterior capsule to clamp the original lens. The entire surgical procedure can be performed under visco-elastic maintenance anterior chamber, or under anterior chamber perfusion maintenance anterior chamber.

Example two.

As shown in fig. 5 and 6, the present embodiment provides an additional correction type intraocular lens comprising: the fixing device comprises an optical part (1) and a fixing component for positioning the optical part (1), wherein the fixing component is a clamping part (2).

The clamping part (2) comprises a connecting part (20) and a clamping opening part (22) arranged on the connecting part (20), and the connecting part (20) is distributed along the outer circumference of the optical part (1) and is connected with the optical part (1).

As an example, the connection portion (20) is: a ring-shaped structure which is convex inwards along the axial direction of the optical part (1) and forms a dish-shaped structure with the optical part (1); the bayonet part (22) is: a notch (5) arranged on the annular structure, wherein the notch (5) is used for avoiding the root of the original lens loop and determining that the additional correction type intraocular lens keeps in place. That is, the position of the notch (5) corresponds to the root of the original haptic.

Preferably, the inner diameter of the loop structures is the same as the diameter of the original lens optic, so that the original lens optic can be snapped into the loop structures without affecting the position of the original lens and ensuring stability and centering of the additional corrective intraocular lens.

Preferably, the additional corrective intraocular lens further comprises: and each supporting part (4) is symmetrically arranged on the periphery of the outer edge of the optical part (1) along the radial direction of the optical part (1) and is connected with the optical part (1).

As an example, the supporting part (4) can be a wing part with a thin design, and preferably, the shape of the supporting part (4) can be a wing-shaped single-piece plate type structure, and can also be a C or L shape, and the supporting part can extend into a capsular bag to assist in keeping the additional correction type intraocular lens stable.

Preferably, each support (4) is provided with a first alignment hole (221).

The application range of the additional correction type intraocular lens of the present embodiment is the same as that of the first embodiment, and therefore, the description thereof is omitted. The model of the optical part of the additional correction type lens is determined according to the size of the optical area of the original lens of the eye (such as 5.5mm or 6.0 mm) when in use. When in use, the main incision of the original operation is implanted or a transparent cornea or a corneoscleral incision is additionally prepared, the main incision is naturally unfolded after being implanted into the anterior chamber in the mydriatic state, the positioning hook extends into the positioning hole on the supporting part to integrally implant the additional correction type intraocular lens into the anterior capsule opening, the dish-shaped recess is matched with the optical part of the original lens, and the supporting part is arranged under the anterior capsule to assist in fixing the additional correction type intraocular lens. For the first time, the lens is implanted for a long time, and the front and back capsule or the front capsule is adhered to the optical part of the original lens, so that the front capsule membrane is separated from the original lens in advance to fix the additional correction type intraocular lens. The entire surgical procedure can be performed under visco-elastic maintenance anterior chamber, or under anterior chamber perfusion maintenance anterior chamber.

An additional correction type intraocular lens having a "grip portion" is described in detail below in connection with example three and example four.

Example three.

As shown in fig. 7 and 8, the present embodiment provides an additional correction type intraocular lens comprising: an optical part (1) and a fixing component for positioning the optical part (1); the fixing component is wing-shaped clamping parts (3) symmetrically arranged on two sides of the optical part (1) along the radial direction of the optical part (1).

Each clamping portion (3) comprises: a front wing (11) and a rear wing (12); the front wing (11) is distributed along the outer circumference of the optical part (1) and connected with the optical part (1), and the rear wing (12) is connected with the inner surface of the optical part (1), so that the front wing (11) and the rear wing (12) form a wing-shaped bayonet structure.

Preferably, the curvature of the upper surface of the front wing (11) is consistent with the curvature of the optical part (1).

The front wing (11) comprises a first front wing (110) and a second front wing (112), and the first front wing (110) and the second front wing (112) have a predetermined spacing therebetween; and a second positioning hole (6) positioned between the first front wing (110) and the second front wing (112) is formed in the rear wing (12), and the aperture of the second positioning hole (6) is smaller than or equal to the preset distance.

Illustratively, the rear wing (12) is L-shaped, and the end of the rear wing (12) is connected with the inner surface of the optical part (1) so as to form a space between the front wing (11) and the rear wing (12).

As shown in fig. 8, the distance between the corresponding rear wings (12) in the two clamping parts can be set according to the diameter of the front bag opening, such as 5.0mm, 5.25mm, 5.5mm, 5.75mm or 6.0 mm.

The number of the rear wings (12) is one or more. Preferably, the number of second alignment holes (6) is the same as the number of rear wings (12).

As shown in fig. 9 and 10, when the number of the rear wings (12) is one (i.e., a single rear wing), the rear wings (12) form wing-shaped bayonet structures with the first front wing (110) and the second front wing (112). When the eye correction type intraocular lens is used, the rear wing (12) is inserted under an anterior capsule of a capsular bag, the first front wing (110) and the second front wing (112) are located on the anterior capsule, namely, the rear wing (12) is located on one side of the anterior capsule, and the first front wing (110) and the second front wing (112) are located on the other side of the anterior capsule, so that the wing-shaped bayonet structures clamp and support the edge of an anterior capsule opening, and the additional correction type intraocular lens is fixed in place.

As shown in fig. 11, when the number of the rear wings (12) is plural, the distance between the end of each rear wing (12) arranged in parallel and the outer edge of the optical portion (1) is gradually increased or decreased, so that the plural rear wings (12) are distributed in a stepwise manner away from or close to the outer edge of the optical portion (1), in this case, each rear wing (12) forms a wing-shaped bayonet structure with the first front wing or the second front wing respectively, that is, each clamping part has a plurality of wing-shaped bayonet structures. When in use, an operator can select the rear wings with corresponding intervals to be plugged into the front parts of the corresponding rear wings (12) (namely, the rear wings are plugged into the corresponding wing-shaped bayonet structures) according to the size of the front bag opening.

Taking the case of double posterior wings as an example, as shown in fig. 12, when the anterior capsule opening is relatively large, a wing-shaped bayonet structure of the posterior wing with a far end (i.e. close to the outer edge of the optical part (1)) is selected to clamp the anterior capsule opening; as shown in fig. 13, when the anterior capsule is relatively small, a wing-like bayonet structure with proximal (i.e., away from the outer edge of the optic (1)) posterior wings is selected to grip the anterior capsule.

The additional corrective intraocular lens of this embodiment is suitable for patients who have difficulty in exposing the intact anterior capsule or the original lens optic. In use, the spacing size (e.g., 5.0mm, 5.25mm, 5.5mm, 5.75mm, or 6.0mm, etc.) of the fixation assembly (i.e., the clamp) is determined based on the anterior capsule opening size of the operative eye. When the auxiliary correction type intraocular lens is used, a main incision of an original operation is implanted or a transparent cornea or a corneoscleral incision is additionally prepared, the auxiliary incision is naturally unfolded after being implanted into the anterior chamber in a mydriatic state, the positioning hook extends into the second positioning hole of the clamping part to insert the rear wings with proper intervals at two sides into the anterior capsule, and the wing-shaped bayonets formed by the front wings and the rear wings clamp and support the edge of the anterior capsule opening, so that the auxiliary correction type intraocular lens is fixed in place and the optical part (1) is positioned in front of the capsule. For the first time, the separation of the clamping and supporting parts is needed for the long time after the implantation of the artificial lens and for the adhesion of the front and back capsules or the front capsule and the optical part of the original lens. The entire surgical procedure can be performed under visco-elastic maintenance anterior chamber, or under anterior chamber perfusion maintenance anterior chamber.

Example four.

As shown in fig. 14 and 15, the present embodiment provides an additional correction type intraocular lens comprising: an optical part (1) and a fixing component for positioning the optical part (1); the fixing component comprises two clamping parts (3); each clamping portion (3) comprises: a U-shaped groove (13) and a connecting rod (14); one end of the connecting rod (14) is connected with the U-shaped groove (13), and the other end of the connecting rod (14) is connected with the optical part (1); the opening direction of the U-shaped groove (13) is as follows: in the radial direction of the optical portion (1) and in a direction away from the optical portion (1).

It can be understood that the distance between the corresponding U-shaped grooves (13) in the two clamping parts can be set according to the diameter of the front bag opening, such as 5.0mm, 5.25mm, 5.5mm, 5.75mm or 6.0 mm.

The additional correction type intraocular lens of the embodiment utilizes the U-shaped groove (13) to clamp the edge of the anterior capsule opening so as to position the optical part (1) on the capsule, and the connecting rod (14) can be made of elastic materials and forms an included angle of less than 90 degrees with the optical part (1) so as to support the anterior capsule openings with different sizes and reduce the rigid support damage of the capsule.

The lens of this embodiment has the same application range as that of the embodiment, and therefore, the description thereof is omitted. When in use, the primary incision of the original operation is implanted or a transparent cornea or a corneoscleral incision is additionally prepared, the anterior chamber is implanted in a mydriatic state and then naturally unfolded, and the positioning hooks are used for respectively pressing the elastic loops and clamping and supporting the edge of the anterior capsule opening by the U-shaped grooves, so that the additional correction type intraocular lens is fixed in place. For the first time, the separation of the clamping and supporting parts is needed for the long time after the implantation of the artificial lens and for the adhesion of the front and back capsules or the front capsule and the optical part of the original lens. The entire surgical procedure can be performed under visco-elastic maintenance anterior chamber, or under anterior chamber perfusion maintenance anterior chamber.

The "optical portion" of the additional corrective intraocular lens according to embodiments of the present invention will be described in detail below.

Illustratively, a through hole (7) with the diameter of 0.2-0.5 mm is arranged in the center of the optical part (1) to ensure the flow of aqueous humor between the additional correction type intraocular lens and the original lens optical part and prevent the accumulation of interlaminar proteins and the generation of turbidity.

Further, as an example, the optical portion refractive type of the additional corrective intraocular lens may be set to the following type according to the patient's first postoperative refractive status: sphere correction (myopia/hypermetropia), cylinder correction (astigmatism), and supplementary focus correction.

Correcting the spherical lens: the myopia/hyperopia can be corrected with diopter of +5.0D to-5.0D. Is suitable for the first time of influencing the visual function of the cataract after the operation of residual spherical lens. The method is particularly suitable for being used after the implantation of the multifocal intraocular lens, and the residual spherical lens generated after the operation of the patient has large influence on life and high cost for replacing the lens.

And (3) cylindrical lens correction: and (3) astigmatism correction, wherein the correction range can be 0.75D-6.0D, the astigmatism axis design is consistent with the lens long axis, and the edge of the optical part can be provided with astigmatism axis marks. The lens is suitable for patients with primary cataract postoperative surgical astigmatism or astigmatism residue affecting vision function, and the capsular opening clamping and supporting positions of the implanted lens are selected according to the astigmatism axis position of the patient in the operation, so that the lens is not easy to rotate after being fixed, and the correction effect is reduced.

Additional focus correction: and may be of the area refractive or diffractive type. The former is that the optical part is added with a near vision area of +2.5D to + 4.0D; the latter is a diffractive ring with concentric circles arranged on the front surface of the optical part, and the total refractive power can be 0D. Additional near or intermediate vision focus is provided by the combination with the patient's previously implanted lens optic. The additional focus correcting lens is suitable for the first cataract operation implantation of single focus artificial lens to provide near and middle distance vision. The total refractive power of the additional focus correction lens can be 0D, and 0 to +/-5.0D of spherical lens or 0.75 to 6.0D of cylindrical lens diopter can be added at the same time, so that the residual spherical lens or cylindrical lens diopter of a patient can be corrected while the additional focus is provided.

The utility model discloses an add and follow after type intraocular lens of rectifying keeps the position stable through the mode of fixed subassembly with the former crystal optical part of joint or the preceding bag mouth of centre gripping to remaining ametropia or looking near the difficulty and following after implanting the artificial lens and correcting, effectively solving the problem of ametropia or myopia difficulty, avoid simultaneously inducing symptoms such as iritis and high intraocular pressure complication. Moreover, the additional correction type intraocular lens structure can be suitable for the shapes of the capsular bags and the sizes of the diameters of the anterior capsular bag openings of different patients. In addition, the additional correction type intraocular lens is applied in front of the original lens, and the damage to the eyes is small.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An add-on corrective intraocular lens comprising: an optical part (1) and a fixing component for positioning the optical part (1);

wherein, fixed subassembly is joint portion (2), joint portion (2) include: a connecting portion (20) and a bayonet portion (22) provided on the connecting portion (20); the connecting parts (20) are distributed along the outer circumference of the optical part (1) and connect the optical part (1);

alternatively, the fixation assembly comprises at least two clamping portions (3), each clamping portion (3) comprising: a front wing (11) and a rear wing (12); the front wing (11) is distributed along the outer circumference of the optical part (1) and connected with the optical part (1), and the rear wing (12) is connected with the inner surface of the optical part (1), so that the front wing (11) and the rear wing (12) form a wing-shaped bayonet structure;

or, each grip (3) comprises: a U-shaped groove (13) and a connecting rod (14); one end of the connecting rod (14) is connected with the U-shaped groove (13), and the other end of the connecting rod (14) is connected with the optical part (1); wherein, the opening direction of the U-shaped groove (13) is as follows: in the radial direction of the optical portion (1) and in a direction away from the optical portion (1).

2. The extra corrective intraocular lens of claim 1, characterized in that the connection part (20) is: the cross section of the convex edge (200) extending outwards along the radial direction of the optical part (1) is in an L-shaped structure formed by bending towards the axial direction of the optical part (1);

wherein the bayonet part (22) is: an inwardly curved jaw (220) arranged at the end of the L-shaped structure, the jaw (220) being in circular arc transition with the connection face of the L-shaped structure.

3. The extra corrective intraocular lens of claim 2, characterized in that a first positioning hole (221) is provided in the connecting portion (20), said first positioning hole (221) extending obliquely outward through the ledge (200) and into the interior of the L-shaped structure.

4. The extra corrective intraocular lens of claim 1, characterized in that the connection part (20) is: a ring-like structure protruding inward in the axial direction of the optical portion (1); the ring-shaped structure and the optical part (1) form a dish-shaped structure;

wherein the bayonet part (22) is: a notch (5) provided on the ring-shaped structure.

5. An extra corrective intraocular lens according to any one of claims 1 to 4, wherein the extra corrective intraocular lens further comprises: at least two supporting parts (4), wherein each supporting part (4) is arranged on the outer circumference of the optical part (1) along the radial direction of the optical part and is connected with the optical part (1);

wherein each support part (4) is of a wing-shaped single-plate structure.

6. The extra corrective intraocular lens of claim 1, characterized in that the curvature of the upper surface of the anterior wing (11) coincides with the curvature of the optical portion (1);

the rear wing (12) is L-shaped, and the end part of the rear wing (12) is connected with the inner surface of the optical part (1), so that a distance is formed between the front wing (11) and the rear wing (12).

7. The extra corrective intraocular lens of claim 6, characterized in that the number of said posterior wings (12) is one or more;

when the number of the rear wings (12) is multiple, the distance between the end part of each rear wing arranged in parallel and the outer edge of the optical part (1) is gradually increased or decreased, so that the plurality of rear wings are distributed in a stepped manner and are gradually far away from or close to the outer edge of the optical part (1).

8. The extra corrective intraocular lens of claim 6 or 7, characterized in that the anterior wing (11) comprises a first anterior wing (110) and a second anterior wing (112), the first anterior wing (110) and the second anterior wing (112) having a predetermined spacing therebetween;

wherein, a second positioning hole (6) is arranged on the rear wing (12) and positioned between the first front wing (110) and the second front wing (112), and the aperture of the second positioning hole (6) is smaller than or equal to the preset distance.

9. The extra corrective intraocular lens of claim 1, characterized in that the center of the optical portion (1) is provided with a through hole (7) having a diameter of 0.2 to 0.5 mm.