Intraocular lens

Abstract

An intraocular lens according to one aspect of the present invention comprises an optic part (100) and a haptic part (200), wherein the haptic part (200) comprises at least three connection parts (220) connected to the optic part (100) and ring-shaped loops (210) connected to the connection parts (220).

Description

intraocular lens

[0001] The present invention relates to an intraocular lens, and more specifically, to an adjustable intraocular lens capable of adjusting perspective according to a force transmitted from a refractive index.

[0002] Conventional intraocular lenses have a problem in that the force related to relaxation and contraction movements transmitted from the true rim is not efficiently transmitted to the intraocular lens inside the capsular bag. Accordingly, the inventor of the present invention proposed an intraocular lens support in Korean Patent No. 10-0843454, which, unlike a tension ring used to maintain the circular outline of the capsular bag during cataract surgery, solves the problem that the anterior and posterior capsules of the capsular bag become attached when using the conventional capsular tension ring, which causes problems in controlling the lens thickness of the intraocular lens. In addition, the force related to relaxation and contraction movements transmitted from the true rim is efficiently transmitted to the intraocular lens inside the capsular bag, so that the intraocular lens has an excellent function of accommodative power like a natural lens.

[0003] Meanwhile, since the intraocular lens support is a means for efficiently transmitting the force of the saddle to the intraocular lens, a structure suitable for efficiently receiving the force is also required on the other side of the intraocular lens itself.

[0004] However, as shown in Fig. 1, the shape of the haptic part of the conventional intraocular lens is a simple rod shape, making it difficult to efficiently transmit the force transmitted to the entire area where the rod contacts the capsule bag, and therefore, development of this is necessary.

[0005] One aspect of the present invention is to provide an adjustable intraocular lens that can efficiently receive power transmitted from a capsular bag, has high controllability, and is easy to be positioned in the center when positioned inside the capsular bag during surgery.

[0006] Another aspect of the present invention is to provide an intraocular lens assembly including an intraocular lens that efficiently transmits force transmitted from the outside to the capsule bag to the intraocular lens and a support that performs the function of stably positioning the intraocular lens on the inside.

[0007] An intraocular lens including an optical part (100) and a haptic part (200) according to one aspect of the present invention is characterized in that the haptic part (200) includes at least three connecting parts (220) connected to the optical part (100) and ring-shaped loops (210) connected from the connecting parts (220).

[0008] At this time, the optical part (100) has a front surface (110a) through which light flows in and a rear surface (120a) through which light flows out, and it is preferable that the haptic part (200) forms an angle of 2 to 10 degrees toward the front from the reference line dividing the front surface (110a) and the rear surface (120a).

[0009] At this time, it is preferable that the front surface (110a) and the rear surface (120a) have a biconvex shape.

[0010] Additionally, it is preferable that the thickness of the haptic portion is 0.4 to 0.5 mm.

[0011] In addition, it is preferable that the area ratio between the ring-shaped loop (210) and the optical part (100) is 1:2 to 1:2.5.

[0012] In addition, it is preferable that the total outer diameter (R) including the optical portion (100) and the haptic portion (200) is 5 to 40% longer than the (cross-sectional) length of the front portion (410) of the capsule bag.

[0013] Additionally, it is preferable that the intraocular lens be positioned in front of the center of the inside of the capsule bag after being inserted into the capsule bag.

[0014] In addition, it is preferable that the intraocular lens is inserted into the capsule bag, and then the haptic part (200) is installed so that it extends from the reference line at an angle of 2 to 10 degrees in the anterior direction and then bends in the posterior direction to come into contact with the capsule bag.

[0015] In addition, when the radius of the center forming the spherical surface of the front surface of the optical part is R1 and the radius of the center forming the spherical surface of the rear surface is R2, it is preferable that R1 is equal to or larger than R2.

[0016] In particular, it is preferable that the R1 / R2 value be 1.1 or higher.

[0017] In addition, it is preferable that the length (d) of the haptic portion is 0.7 to 1.0 times the diameter length (D) of the optical portion when the diameter length of the optical portion is 1.

[0018] An intraocular lens assembly according to another aspect of the present invention is an intraocular lens assembly inserted into a capsule bag having a front part, an equatorial part, and a rear part,

[0019] An intraocular lens having an optical part (100), a connection part (220) connected to the optical part (100), and a haptic part including at least three ring-shaped loops (210) connected from the connection part (220); and

[0020] It is characterized by including an intraocular lens connecting support (300) that includes a fixing means (330) with which the loop (210) of the intraocular lens contacts and to which the end of the loop (210) is fixed.

[0021] At this time, the intraocular lens connecting support (300) is a ring-shaped structure provided inside along the equatorial portion of the capsular bag, and in a cross-section of the structure cut in the visual axis direction, the wall of the structure has an inner surface (302) and an outer surface (301) that are convex toward the capsular bag, and the wall preferably includes an anterior section (310) positioned forward in the visual axis direction, and a posterior section (320) extending from the anterior section (310) and positioned backward in the equatorial portion.

[0022] At this time, it is preferable that the optical part is located between the front part of the capsule bag and the equatorial part.

[0023] At this time, it is preferable that the haptic portion be in close contact with the inner surface of the capsule bag, which includes an inner surface area corresponding to the area where the haptic portion is connected.

[0024] In addition, the optical part (100) has a front surface (110a) through which light enters and a rear surface (120a) through which light exits.

[0025] It is preferable that the haptic portion (200) extends from the reference line dividing the front surface (110a) and the rear surface (120a) at an angle of 2 to 10 degrees toward the front side and then bends toward the rear side to be installed in contact with the capsule bag.

[0026] As described above, the intraocular lens according to one aspect of the present invention has at least three haptic parts (200) that are in equal contact with the inner surface (302) of the capsule bag, so that when positioned inside the capsule bag during surgery, it is easy to position the optic part (100) exactly in the center without tilting (centering).

[0027] In addition, since the haptic part (200) is tightly fixed inside the capsule bag in the shape of three or more relatively large circular rings, an oval or inverted oval shape change is induced in response to a shape change of the capsule bag during adjustment, and the optic part (100) is pushed forward (toward the iris) through a very flexible connecting part (220) to exert an adjustment force, which is almost similar to an adjustment mechanism that exerts an adjustment force much greater in the front part than in the back part (420) of an actual natural lens.

[0028] In addition, the size of the optical part (100) is small and the thickness of the connecting part (220) connecting the optical part (100) and the haptic part (200) is thin and flexible, so there is an effect that insertion is possible with only a small incision during surgery.

[0029] In addition, the optic part (100) is inserted into the capsule bag and then moved forward to be mounted, which is completely different from the conventional intraocular lenses as all existing intraocular lenses are positioned at the equator (430) of the crystalline lens or slightly behind the equator (430), and the movement of the front part (iris side) of the optic part (100) according to the change in the front part of the crystalline lens capsular bag is maximized, thereby realizing high accommodative power.

[0030] In addition, the haptic part (200) is installed so that it extends at an angle of 2 to 10 degrees toward the front and then bends toward the back to make contact with the capsular bag. The reason for this is firstly, to maximize the controllability by strongly contacting the three rings of the haptic part (200) inside the front capsular bag (especially the anterior ciliary muscle attachment location) that exerts a stronger controllability than the back part (420), secondly, to help prevent tilting or decentering of the optic part of the intraocular lens, and thirdly, in the case where there is no angulation toward the front or there is direct angulation toward the back, the optic part electrode of the intraocular lens is excessively adjusted during control and moves toward the front part (toward the iris) to make contact with the iris, which may cause iritis, or more severely, to block the flow of aqueous humor and cause acute glaucoma.

[0031] Meanwhile, when the intraocular lens is combined with a support provided inside a capsule bag of a specific structure, higher adjustability and refractive index can be achieved.

[0032] Figure 1 is a schematic diagram of a human eye and an intraocular lens installed in the eye.

[0033] Figure 2 is a plan view of an intraocular lens according to one embodiment of the present invention.

[0034] Figure 3 is a cross-sectional view taken along line A-A' of Figure 2.

[0035] Figure 4 is a cross-sectional view taken along line B-B' of Figure 2.

[0036] Figure 5 is a schematic diagram showing the state of insertion of an intraocular lens into a capsule bag according to an embodiment of the present invention.

[0037] Figure 6 is a plan view of a connecting support (300) for an intraocular lens according to one embodiment of the present invention.

[0038] Fig. 7 is a cross-sectional view taken along line C-C' of Fig. 6.

[0039] Figure 8 is a schematic diagram showing the insertion state within the capsule bag of an embodiment according to the present invention.

[0040] Figure 9 is a schematic diagram showing the insertion state within the capsule bag of a reference embodiment that is the same as the present invention but has a different direction of the haptic part (200).

[0041] FIG. 10 is an explanatory diagram illustrating the operation of an intraocular lens when looking at a long distance and a near distance, respectively, according to the embodiment of FIG. 8.

[0042] Before describing the present invention in detail below, it is important to understand that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of the present invention, which is limited solely by the scope of the appended claims. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.

[0043] Throughout this specification and claims, unless otherwise stated, the terms "comprise," "comprises," and "comprising" are used to mean including a stated item, step, or group of items, and steps, but not to the exclusion of any other item, step, or group of items, or group of steps.

[0044] Meanwhile, the various embodiments of the present invention may be combined with any other embodiments unless explicitly indicated otherwise. Any feature indicated as particularly preferred or advantageous may be combined with any other feature or features indicated as preferred or advantageous.

[0045] In the drawings, the width, length, thickness, etc. of components may be exaggerated for convenience. Overall, the drawings are described from the observer's perspective, and when a component is said to be "above / below" or "on / below" another component, this includes not only cases where it is "directly above / directly below" another component, but also cases where there is another component in between.

[0046] Fig. 2 is a plan view of an intraocular lens according to an embodiment of the present invention, Fig. 3 is a cross-sectional view taken along line A-A' of Fig. 2, and Fig. 4 is a cross-sectional view taken along line B-B' of Fig. 2. Accordingly, the intraocular lens according to an embodiment of the present invention includes an optics portion (100) and a haptic portion (200).

[0047] The optics (100) forms the center of the intraocular lens and is where light passes through and is focused, performing the essential function of the intraocular lens. The optics (100) includes a front surface (110a) through which light enters and a rear surface (120a) through which light exits. The optics (100) is made of a high-quality transparent material and serves to correct vision and accurately transmit images to the retina of the eye.

[0048] The optical component (100) is primarily made of acrylic, silicone, or other highly biocompatible materials, but the present invention is not limited to a specific material. Preferably, these materials should be transparent, possess high optical quality, be stable for a long period of time within the human body, and have properties that minimize allergic reactions or inflammation.

[0049] The front surface (110a) and the rear surface (120a) of the optical part (100) preferably have a refractive power (smaller radius of curvature) that is 1.25 to 2.5 D (diopter) higher than the refractive power of the central part (smaller radius of curvature) than the refractive power of the peripheral part, and have a biconvex aspherical shape.

[0050] The aspherical design mimics the optical properties of the eye's natural crystalline lens, providing a more natural visual experience for the user. The aspherical design of the anterior surface (110a) provides better refraction for light passing through the periphery of the eye, while the aspherical design of the posterior surface (120a) interacts with the eye's natural fluid dynamics to help maintain the position and stability of the intraocular lens, thereby minimizing refractive errors.

[0051] At this time, it is preferable that the rear surface (120a) be set to a similar degree of asphericity as that of the front surface (110a) (e.g., 1.25:1.25, 1:1.25, 1.25:1, 2.5:2.5). In order to express the shape of the aspheric surface in a single number, a mathematical equation used to describe the aspheric surface can be used.

[0052] (Formula 1)

[0053]

[0054] Here, c is the reciprocal of the central radius of curvature of the lens, k is the conical constant, and A1, A2, A3… are higher-order aspheric coefficients. Each aspheric coefficient represents the degree to which the surface deviates from a sphere (z and h are shown in Fig. 3). For example, A1 is r 4 As a coefficient of protest, it indicates how much the shape of the lens deviates from a spherical surface when the value of r is large (i.e., near the edges of the lens).

[0055] Therefore, coefficients such as A1, A2, A3… are used to express the change in curvature that increases from the center to the edge of the lens, allowing for the accurate description of the overall aspherical shape of the lens. Therefore, these coefficients do not comprehensively represent the difference from a sphere with a single value, but are parameters used to describe the difference in curvature at a specific point on the lens.

[0056] For example, in the intraocular lens of FIG. 3, when the radius of the center forming the spherical surface of the anterior surface (110a) is R1 and the center forming the spherical surface of the posterior surface (120a) is R2, R1 is equal to or greater than R2. In addition, the spherical surface becomes flatter as it approaches the edge of the optical portion (100). At this time, the ratio R1:R2, R1 / R2, is preferably 1.1 to 2.

[0057] Meanwhile, since the intraocular lens according to the present invention is stably positioned in the center within the capsule bag (400), an aspherical shape can be implemented as desired to obtain a desired accommodative power. For example, the front surface (110a) and the rear surface (120a) of the optical portion (100) can form an aspherical surface that is convex in the center and becomes flatter toward the edge.

[0058] Meanwhile, the diameter of the optic part (100) in conventional intraocular lenses is generally in the range of 6 mm to 7 mm, but in the embodiment of the present invention, the optic part (100) is 4.3 to 5.5 mm, more preferably 4.5 to 4.8 mm. This is to make the diameter of the optic part (100) relatively small and to lengthen the length of the haptic part (200). The reason for using the optic part (100) of conventional 6 mm is to prepare for cases where the intraocular lens is not accurately seated in the center when inserted into the capsule bag (400) during surgery.

[0059] However, since the optical part (100) of the present invention is precisely positioned in the center by the haptic part (200), as will be described later, the size of the optical part (100) can be reduced. If the size of the optic part (100) is reduced, the incision area during surgery can be reduced, and the relatively enlarged haptic part (200) can induce more changes in the haptic part (200) during adjustment, thereby further increasing the bio-controllability. That is, the ability to reduce the size of the optic part (100) is one of the main effects of the intraocular lens according to the present invention.

[0060] The thickness of the optical part (100) is not limited, but generally, the higher the refractive index of the material used, the higher the asphericity, and the thinner the basic thickness of the optical part (100), the thinner it becomes.

[0061] The haptic part (200) serves to fix the intraocular lens inside the capsule bag (400), is located on the outer surface of the optic part (100), and supports the intraocular lens so that it is stably positioned inside the capsule bag (400). In other words, the haptic part (200) plays an important role in ensuring that the lens is fixed in the correct central position and remains in place despite the natural movement of the eye.

[0062] The haptic part (200) is made of a material that is flexible and can provide sufficient support, and materials with high biocompatibility that are stable for a long time in the human body and minimize allergic or inflammatory reactions, such as silicone, acrylic, and propylene, can be used.

[0063] The haptic portion (200) is tilted forward by an angle (a) of about 2° to 10° with respect to the reference line of the optic portion (100), that is, the reference line dividing the front surface (110a) and the rear surface (120a). This is to allow the loop (210) to make stronger contact with the inner surface (302) of the front surface (410) of the capsule bag (400) by bending the connecting portion (220) when the optic portion (100) is moved forward and fixed after inserting the intraocular lens into the capsule bag (400), as described later.

[0064] The haptic unit (200) of the present invention includes at least three loops (210) and connecting units (220). For example, when there are three loops (210), each loop (210) forms an angle of 120 degrees and is coupled to the optical unit (100) by three connecting units (220), or when there are four loops (210), each loop (210) is coupled in pairs of two, and each pair forms an angle of 180 degrees with respect to each other and can be coupled to the optical unit (100) by four connecting units (220) or two integrated connecting units (220).

[0065] The loop (210) preferably has a ring shape, which increases the area in contact with the capsule bag (400) while being flexible and linked to the movement of the capsule bag (400) to increase the power transmission capacity. That is, the loop (210) is deformed into an oval shape in front and behind the equator (430) and thus can increase the power transmission capacity when used independently or in conjunction with the connecting support (300) described below.

[0066] The diameter of the loop (210) is preferably 2.8 to 3.2 mm, which is smaller than the diameter of the optical portion (100). In the case of a ring shape, the cross-sectional shape is not limited, and various shapes such as circle, square, and polygon can be applied. In this case, the area ratio of the loop (210) to the optical portion (100) is preferably 1:2 to 1:3, and preferably 1:2 to 1:2.5.

[0067] The area of ​​the optics (100) refers to the area on the plane when the optics (100) is orthogonally projected onto the plane, and the area of ​​the loop (210) refers to the area formed by the outer shape of the loop (210), including the empty space inside, when the loop (210) is orthogonally projected onto the plane.

[0068] The thickness of the haptic part (200) can be used to be the same as or similar to the attachment thickness of the connection part (220) of the optical part (100), and is preferably 0.4 to 0.5 mm.

[0069] The connecting portion (220) connects the optical portion (100) and the loop (210), and is preferably manufactured to be more flexible than the optical portion (100) or the haptic portion (200). For this purpose, for example, the connecting portion (220) may be made thin to allow for easy bending. FIG. 4 illustrates a case where the connecting portion (220) is made thin by being concave downward.

[0070] Since the connecting portion (220) is formed flexibly, the connecting portion (220) can be bent when the optical portion (100) is moved forward after being inserted into the capsule bag (400). As a result, the loop (210) can increase the area in contact with the inner surface (302) of the connecting support (300) described later.

[0071] FIG. 5 is a schematic diagram showing the state of insertion of an intraocular lens having four haptic parts (200) into a capsule bag (400) according to an embodiment of the present invention. For convenience of illustration in the drawing, the number of haptic parts (200) is illustrated as four in order to be symmetrical, but the present invention is not limited thereto. It is preferable that the cross-sectional extension length of the intraocular lens including the optic part (100) and the haptic part (200) according to the embodiment of the present invention be 5 to 40% longer than the extension length of the outer surface (301) of the front part (410) of the capsule bag (400), so that when the intraocular lens is positioned in the capsule bag (400), the capsule bag (400) is supported from the inside so that the haptic part (200) of the intraocular lens can push the capsule bag (400) from the inside, thereby tightening the capsule bag (400).

[0072] The length (d) of the haptic portion (200), i.e., the sum of the lengths of the connecting portion (220) and the loop (210), is preferably 0.7 to 1.0 times the diameter length (D) of the optic portion (100), when 1 is taken as 1. That is, when D / 2 is the length of the optic portion (100) and d is the length of the haptic portion (200), in comparison, the length of the haptic portion (200) is preferably longer than the length of the optic portion (100). If it is smaller than the above range, the optic portion (100) becomes large, increasing the cutting section, and if the size of the optic portion (100) is too small, causing a problem when the optic portion (100) is not positioned centrally within the capsule bag (400). This is a significant difference from the conventional intraocular lens in which the diameter of the haptic portion (200) is 0.5 or less than the diameter of the optic portion (100).

[0073] The thickness of the haptic portion (200) is preferably 0.3 to 0.5 mm, and the connecting portion (220) having a concave portion is preferably thinner by 6 / 10 to 9 / 10 of the haptic portion (200).

[0074] The materials of the optical part (100) and the haptic part (200) may be different materials or may be the same material but have different hardness and flexibility, but it is more preferable to use the same material because it is easier to manufacture.

[0075] The intraocular lens according to the present invention can forcefully and intensively attach the haptic portion (200) to the area with the strongest accommodative force, where the scapular muscle connected to the annular ciliary muscle of the front part (410) of the capsular bag (400) of the crystalline lens is attached when the capsular bag (400) is inserted.

[0076] That is, when the shape of the lens changes due to the contraction of the ciliary muscle being transmitted to the retina during near-distance adjustment of the lens, it is preferable that the haptic part (200) be in the shape of a loop (210) with a thin border and a large hole in order to receive all of this shape change regardless of the shape of the inner surface (302) of the capsule bag (400).

[0077] At least three loops (210) of the haptic part (200) directly induce the force of the lens' diameter decreasing into a change in the shape of the loops (210), and push the optic part (100) toward the front part (410) through the connecting part (220) that acts as a lever, so that the lens of an actual human body can exert an adjustment force similar to the one that causes the lens electrode part to protrude when adjusting for a short distance.

[0078] Accordingly, when the intraocular lens of the present invention is placed in a capsule bag (400), the haptic part (200) is first brought into close contact with the inner surface (302) corresponding to the outer surface area of ​​the lens to which the crystalline lens is attached, which is connected from the annular ciliary muscle of the front part (410), and in particular, the haptic part (200) has three or more loops (210) in contact with the inner surface (302) of the front part (410), the equatorial part (430), and the inner surface (302) of the back part (420).

[0079] That is, the haptic part (200) is preferably in full contact with the inner surface (302) of the front part (410) corresponding to the area of ​​the outer surface (301) of the capsule bag (400) to which the tether connected to the annular ciliary muscle of the front part (410) of the lens is attached, and is preferably of a length that can partially contact the inner surface (302) of the rear part (420) through the front part (410).

[0080] Meanwhile, in all conventional intraocular lenses, the optic part (100) is fixed at the equator (430) of the lens or slightly behind the equator (430), and the haptic part (200) is fixed in a stick shape as if poking the equator (430). The optic part (100) of the intraocular lens according to the present invention is positioned at the front inside the capsular bag (400), so that the haptic part (200) can be strongly and intensively attached to the area where the accommodative force connected to the annular ciliary muscle of the front part (410) of the lens is attached.

[0081] Hereinafter, the intraocular lens of the present invention is described as being inserted using an intraocular lens connecting support (300) to more sensitively receive the force transmitted from the capsule bag (400) while allowing the intraocular lens to be seated in the capsule bag (400). The intraocular lens described above can be used independently without the intraocular lens connecting support (300), or can be used together with the connecting support (300).

[0082] Hereinafter, a preferred intraocular lens connection support (300) will be described. Fig. 6 is a plan view of a connection support (300) for an intraocular lens according to one embodiment of the present invention, and Fig. 7 is a cross-sectional view taken along line C-C' of Fig. 6.

[0083] In the present invention, the connecting support (300) maintains the shape of the capsular bag (400), and solves the problem of the anterior and posterior capsules of the capsular bag (400) sticking together, while at the same time efficiently transmitting the relaxation and contraction of the crystalline lens to the intraocular lens, thereby allowing the intraocular lens to provide vision with a sense of perspective like a natural crystalline lens.

[0084] At the same time, the connecting support (300) of the present invention is provided with a fixing means (330) of the haptic part (200) so that the intraocular lens can be accurately positioned at the center of the capsule bag (400). In addition, the fixing means (330) provides a function of moving the intraocular lens forward by a force transmitted from the base, thereby ensuring excellent vision when viewing distant objects.

[0085] The connecting support (300) is inserted into the inner space of the capsular bag (400) of the human eye before the intraocular lens during cataract surgery, and is fixed with the outer surface (301) in contact with the equatorial portion (430) of the capsular bag (400). When the intraocular lens is then inserted, the haptic portion (200) of the intraocular lens is secured to the inner surface (302) of the connecting support (300).

[0086] The connecting support (300) is an open or closed ring-shaped structure, and as shown in FIG. 8, in a cross-section taken along an imaginary plane in the crystalline lens visual axis direction (Y direction), both the inner surface (302) and the outer surface (301) have walls that are convex outward, and the walls include a front section (310), a rear section (320), and a fixing means (330) with the equator of the support as the boundary in the cross-section.

[0087] The front section (310) is a section located in front of the equator line, which is a line connecting both ends of the convex apex of the connecting support (300), and the rear section (320) is a section located in front of the equator line, which is a line extending from the front section (310) and connecting both ends of the convex apex of the connecting support (300), and the fixing means (330) is a means provided in one area of ​​the wall to fix the end of the haptic part (200) of the intraocular lens.

[0088] A preferred example of a fixing means (330) is a bending section. The bending section is a section extending from the posterior section (320) and bending inward. At this time, the end of the haptic portion (200) of the intraocular lens is at the point where the inner surface (302) of the posterior section (320) and the inner surface (302) of the bending section meet, or is secured to the inner surface (302) of the bending section.

[0089] The point where the inner surface (302) of the rear section (320) meets the inner surface (302) of the bend section is because the inner surface (302) of the rear section (320) and the inner surface (302) of the bend section, where the end of the haptic section (200) can be settled, meet to form an area where the haptic section (200) can be settled, and even if the length of the haptic section (200) is long, it can pass over this and be settled on the inner surface (302) of the bend section.

[0090] That is, when the inner surface (302) of the rear section (320) is a curved surface and the inner surface (302) of the bend section is a straight surface around the point where the inner surface (302) of the rear section (320) and the inner surface (302) of the bend section meet, the angle formed by the tangent line on the inner surface (302) of the rear section (320) and the inner surface (302) of the bend section at the point where the inner surface (302) of the rear section (320) and the inner surface (302) of the bend section meet in the cross section may be 45 to 110°, preferably 60 to 100°.

[0091] In addition, when the inner surface (302) of the rear section (320) is a curved surface and the inner surface (302) of the bend section is a curved surface around the point where the inner surface (302) of the rear section (320) and the inner surface (302) of the bend section meet, the angle formed by the tangent line on the inner surface (302) of the rear section (320) and the tangent line on the inner surface (302) of the bend section at the point where the inner surface (302) of the rear section (320) and the inner surface (302) of the bend section meet in the cross section may be 45 to 110°, preferably 60 to 90°.

[0092] If the above range is exceeded, the haptic portion (200) of the intraocular lens cannot be seated at the point where the inner surface (302) of the bending section or the inner surface of the rear section (320) and the inner surface (302) of the bending section meet, and if the range is less than the above range, the haptic portion (200) cannot be seated on the inner surface (302) of the bending section because the legs are long and pass the point where they meet.

[0093] Another example of a fixing means (330) is a protrusion provided on the inner surface (302) of the wall of the connecting support (300). The protrusion differs from the bending section in that it extends directly from the inner wall surface of the rear section (320) along a ring shape, and its function of securing the leg of the haptic section (200) of the intraocular lens is the same as that of the bending section.

[0094] Another example of a fixing means (330) may be to additionally form a fixing groove in the aforementioned bending section. By additionally forming a fixing groove, the end of the haptic portion (200) can be positioned more stably.

[0095] The connecting support (300) preferably has an open section at one end to facilitate insertion during surgery. The open section is preferably open at an angle of 1 to 30° from the center. If the opening is less than 1°, insertion through a small incision during surgery becomes difficult, and if it exceeds 30°, the connecting support (300) may have a reduced ability to support the intraocular lens.

[0096] Meanwhile, when using a connecting support (300), the overall diameter of the connecting support (300) can be manufactured to be 9.0 to 12 mm depending on the size of the eye.

[0097] It is desirable that the inner surface (302) be a smooth surface so that the haptic portion (200) of the intraocular lens can slide well, and the bending section is bent so that the end of the haptic portion (200) can be stably fixed without being detached.

[0098] The outer surface (301) is a surface that comes into contact with the inner surface (302) of the capsule bag (400), and comes into contact at least two points. In order to effectively transmit the force transmitted to the capsule bag (400), it is preferable that at least 1 / 2 to 1 of the cross-sectional length of the outer surface (301) comes into contact with the capsule bag (400). In this case, at least 1 / 2 of the contact area must include a section where the periphery of the equator is connected to the periphery of the periphery. This is to efficiently transmit the force transmitted from the periphery.

[0099] Figure 8 is a schematic diagram showing the insertion state within the capsule bag (400) of an embodiment according to the present invention.

[0100] According to the present embodiment, when the intraocular lens is first inserted into the capsule bag (400), the optic part (100) of the intraocular lens is small and the loop (210) is flexible, so that the lens can be inserted through a small incision. Since the haptic part (200) of the inserted intraocular lens has a predetermined thickness similar to that of the optic part (100), the haptic part (200) is uniformly spread inside the capsule bag (400) to position the optic part (100) at the center, and the end of the haptic part (200) is slightly bent to come into partial contact with the inner wall surface (302) of the capsule bag (400).

[0101] Next, when the optics (100) is moved to the front side, the connecting part (220) is flexible, so the connecting part (220) is bent backwards while being angulated forward by about 2 to 10 degrees, that is, the haptic part (200) is bent forward once and then bent backwards again, so that it comes into contact with the front inner wall surface (302) of the capsule bag (400) over a large area.

[0102] In this way, the power transmitted to the capsule bag (400) can be sufficiently transmitted, and the optical part (100) is stably positioned on the front surface (110a), so that the intraocular lens can better imitate the position of the eye's optical system and natural lens, thereby providing natural results in light refraction and focusing.

[0103] The connection (220) has several additional effects when angulated forward by 2 to 10 degrees.

[0104] First, the three rings of the haptic part (200) strongly contact the anterior inner wall surface (302) (particularly the attachment location of the spur connected to the anterior ciliary muscle (410)) which exerts a stronger controllability than the posterior inner wall surface, thereby maximizing the controllability.

[0105] Second, it helps prevent the intraocular lens optics (100) from tilting or decentring.

[0106] Thirdly, in cases where there is no angulation or there is posterior angulation, the electrode (anterior pole) of the optic part (100) of this intraocular lens is much flatter than the electrode (anterior pole) of the actual natural lens, so that it may move toward the anterior part (410) (iris side) due to excessive adjustment and come into contact with the iris, causing iritis, or in more severe cases, block the flow of aqueous humor, causing acute glaucoma. Therefore, this is to fundamentally block such possibility.

[0107] Meanwhile, FIG. 9 is a drawing showing the shape of the intraocular lens of the present invention and the reference example of the present invention having the same material and shape, but having a haptic portion (200) that is not bent forward by 2 to 10 degrees, when inserted into a capsule bag (400) with a connecting support (300). In the case where there is no angulation or the angulation is bent backward, not only is the centering of the optic portion (100) weakened, but there is also a possibility that iritis or acute closure glaucoma may occur when viewing near or far distances.

[0108] Fig. 10 is a diagram illustrating the operation of an intraocular lens when the haptic part (200) of the intraocular lens is fixed to a connecting support (300) for the intraocular lens and looks at a long distance and a near distance, respectively. When the connecting support (300) is used, since the maximum thickness of the connecting support (300) is 0.35≤ x ≤1, the intraocular lens according to the present invention cannot unfold the legs of the haptic part (200) due to the size of the internal space, but is bent and stretched until it touches the bent section of the connecting support (300).

[0109] Accordingly, as shown in Fig. 10, the legs of the haptic part (200) are extended while contacting the inner surface (302) of the connecting support (300) and the ends are settled in the folded portion. Accordingly, the intraocular lens haptic part (200) is extended while contacting the inner surface (302) of the connecting support (300) and can effectively receive the force transmitted to the connecting support (300), and since both ends are settled in the folded section, centering can be achieved more easily.

[0110] Meanwhile, when using the connecting support (300) having the fixing means (330) of the present embodiment, the length (D / 2+d) on one side from the center of the optical part (100) of the intraocular lens to the end of the haptic part (200) is preferably longer than the outer circumferential length from the apex of the front part (410) of the capsule bag (400) to the fixing means (330), and preferably 105% to 120% of the length to the fixing means (330). As described above, this allows the ends of the three rings to sufficiently contact the fixing means (330), and allows for good transmission of force within the capsule bag (400) and easy centering.

[0111] As described above, by forming the entire length of one side from the center of the intraocular lens to the end of the ring longer than the extension length from the apex of the front part (410) of the capsule bag (400) to the bending end of the inner wall of the connecting support (300), the optical part (100) of the intraocular lens can be positioned in front of the equator.

[0112] Accordingly, since the optic part (100) is positioned forward of the equator, the force transmitted from the capsule bag (400) to the connecting support (300) is such that the haptic part (200) is deformed by the force transmitted from the capsule bag (400) when viewed at a close distance, and the optic part (100) can move forward, and the corrective effect of increasing the accommodative power can be maximized by moving the optic part (100) forward.

[0113] That is, in the case of the existing intraocular lens (IOL), since it is located at the equator (430) or slightly behind the equator (430), the intraocular lens is fixed in a convex shape slightly backward, so when force is transmitted, it has the effect of moving the intraocular lens slightly backward, which has an adverse effect on the accommodative power, but by moving the intraocular lens of the present embodiment forward, a high accommodative power can be obtained.

[0114] Conversely, when viewing from a distance, the optics (100) moves slightly backwards again, and the mechanism is reversed to when the optics (100) moves forward.

[0115] The features, structures, effects, etc. exemplified in each of the aforementioned embodiments can be combined or modified to implement other embodiments by those skilled in the art. Therefore, the contents related to such combinations and modifications should be construed as being included within the scope of the present invention.

[0116] The present invention can be utilized in an intraocular lens for vision correction.

Claims

1. An intraocular lens including an optical part (100) and a haptic part (200), The above haptic part (200) is an intraocular lens including a connecting part (220) connected to the above optic part (100) and at least three ring-shaped loops (210) connected from the connecting part (220).

2. In paragraph 1, The above optical part (100) has a front surface (110a) through which light enters and a rear surface (120a) through which light exits, and the haptic part (200) is an intraocular lens that forms an angle of 2 to 10 degrees toward the front from a reference line dividing the front surface (110a) and the rear surface (120a).

3. In paragraph 2, An intraocular lens in which both the rear surface (120a) and the front surface (110a) are aspherical in shape and the refractive power of the central portion is 1.25 to 2.5 D (diopter) higher than the refractive power of the peripheral portion.

4. In paragraph 3, An intraocular lens in which both the rear surface (120a) and the front surface (110a) are biconvex in shape.

5. In paragraph 1, An intraocular lens having a thickness of the above haptic portion of 0.4 to 0.5 mm.

6. In paragraph 1, An intraocular lens in which the area ratio of the ring-shaped loop (210) and the optical portion (100) is 1:2 to 1:2.

5.

7. In paragraph 1, An intraocular lens having an overall outer diameter (R) including the optical portion (100) and the haptic portion (200) that is 5 to 40% longer than the (cross-sectional) length of the front portion (410) of the capsule bag (400).

8. In paragraph 1, An intraocular lens in which the length (d) of the haptic portion is 0.7 to 1.0 times the diameter (D) of the optical portion.

9. In paragraph 1, The above intraocular lens is an intraocular lens that is inserted into the capsule bag (400) and is positioned in front of the center of the inside of the capsule bag (400).

10. In paragraph 2, The intraocular lens is inserted into the capsule bag (400), and the haptic part (200) extends from the reference line at an angle of 2 to 10 degrees in the anterior direction and then bends in the posterior direction to contact the capsule bag (400).

11. In paragraph 2, An intraocular lens in which the radius of the center forming the spherical surface of the front surface of the above optical part is R1 and the radius of the center forming the spherical surface of the rear surface is R2, wherein R1 is equal to or greater than R2.

12. In paragraph 11, An intraocular lens in which the front and rear surfaces of the above optical part form an aspherical surface that is convex in the center and becomes flatter toward the edge.

13. In paragraph 11, An intraocular lens having an R1 / R2 value of 1.1 to 2.

14. In paragraph 8, An intraocular lens in which the length of the haptic portion is D / 2 and the length of the haptic portion is d, the length (d) of the haptic portion is longer than the length (D / 2) of the optic portion.

15. An intraocular lens assembly inserted into a capsule bag having a front part, an equatorial part, and a back part, An intraocular lens having an optical part (100), a connection part (220) connected to the optical part (100), and a haptic part including at least three ring-shaped loops (210) connected from the connection part (220); and An intraocular lens assembly comprising an intraocular lens connecting support (300) that contacts the loop (210) of the intraocular lens and includes a fixing means (330) to which an end of the loop (210) is fixed.

16. In paragraph 15, The intraocular lens connection support (300) is a ring-shaped structure provided inside along the equatorial portion of a capsular bag (400), and in a cross-section of the structure cut in the visual axis direction, the wall of the structure has an inner surface (302) and an outer surface (301) that are convex toward the capsular bag (400), and the wall includes an anterior section (310) positioned forward in the visual axis direction, and a posterior section (320) extending from the anterior section (310) and positioned posterior to the equatorial portion.

17. In paragraph 15, The above optical part is an intraocular lens assembly located between the front part of the capsule bag (400) and the equatorial part.

18. In paragraph 16, The above haptic part (200) is an intraocular lens assembly that is first closely attached to the inner surface of the front part (410) of the capsule bag (400) that includes an inner surface area corresponding to the area where the haptic part is connected.

19. In paragraph 18, The above optical part (100) has a front surface (110a) through which light enters and a rear surface (120a) through which light exits. An intraocular lens assembly in which the haptic portion (200) extends from a reference line dividing the front surface (110a) and the rear surface (120a) at an angle of 2 to 10 degrees toward the front side and then bends toward the rear side to come into contact with the capsule bag (400).

20. In paragraph 19, An intraocular lens assembly in which a one-sided length (D / 2+d) from the center of the optical portion of the intraocular lens to the end of the haptic portion is longer than the outer circumferential length from the apex of the front portion of the capsule bag (400) to the fixing means.

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