CN113558816A

CN113558816A - Posterior chamber type artificial lens

Info

Publication number: CN113558816A
Application number: CN202010374808.1A
Authority: CN
Inventors: 焦洁
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2021-10-29

Abstract

The invention discloses a posterior chamber type intraocular lens, comprising a circular optical part, namely the intraocular lens body part, and four center-symmetric intraocular lens loops, the intraocular lens loops are hook-like, and the inner side contains a plurality of serrated barbs , the tip of the barb is closed but not connected to the contralateral side. The smooth edge of the intraocular lens loop can be smoothly implanted in the capsular bag and rotated and adjusted in the capsular bag. The intraocular lens loop has a serrated barb design to prevent the suture from coming out. This design is suitable for implantation in the intraocular lens capsular bag, especially suitable for In cases where sutures are required to fix the intraocular lens. This design structure is applicable to IOLs with or without an angle between the IOL haptics and the optic zone, monofocal or multifocal, and astigmatic IOLs.

Description

Posterior chamber type artificial lens

Technical Field

The invention relates to the field of ophthalmic artificial lenses, in particular to a posterior chamber type artificial lens.

Background

In clinical work of ophthalmology, the conditions of dislocation of the lens, loss of the lens or the artificial lens due to trauma, rupture of the posterior capsule membrane in cataract operation and the like are often encountered, the artificial lens can not be implanted into the capsule bag or can be only partially implanted into the capsule bag, and an operator needs to suture and fix the posterior chamber type artificial lens on the spherical wall due to the lack of the support of the posterior capsule membrane. In fixing the intraocular lens, a suture is often used, one end of which is tied to the intraocular lens loop and the other end of which is sutured and fixed to the sclera. In this case, the defects of the prior artificial lens are obvious: firstly, the intraocular space is narrow, when the suture is connected with the artificial lens, the suture is not suitable for knotting and fixing in the eye, the artificial lens is mostly placed on the ocular surface and knotted outside the eye, the time for exposing and contacting the ocular surface is long, the operation time is long, and foreign matters and bacteria on the ocular surface can be brought into the eye when the artificial lens is implanted, so that the probability of inflammation and infection is increased; when the other end of the suture is fixed with the ball wall, such as the suture from inside to outside, the position of the needle is shielded by the iris, which belongs to blind detection, the probability of injury and bleeding is increased, and the position is inaccurate, so that the deviation and the inclination angle of the artificial lens are possible; if the suture is from outside to inside, the suture which is inserted into the front is generally hooked to the outside of the eye from the opening of the tunnel, the action needs to be repeated for 2-3 times according to the number of the fixed threads, the artificial lens is implanted into the eye together with a plurality of sutures after being fixed, and the operation is too complicated; the number of the fixed sutures is difficult to select, when two fixed sutures are used, the intraocular lens can be turned over in eyes, a plane cannot be determined by three points, and the possibility of deviation and inclination angle is high; when more than two sutures are used, a plurality of sutures are required to be implanted into eyes along with the artificial lens in a narrow space at the same time, the possibility of mutual entanglement and interference is high, the operation process is sometimes seriously influenced, even the artificial lens is required to be taken out, the sutures are combed again or tied again, and then the artificial lens is implanted again, so that the operation time is increased, the postoperative inflammation is aggravated, and the corneal endothelium is possibly greatly damaged or even decompensated; fourthly, removing the artificial lens with the stitching point, and selecting a knotting position with large artificial error when connecting the artificial lens and the stitching line; and the fixing thread is a single thread, is thin and large in bearing capacity, easily causes damage of a connecting point of the artificial crystal and the suture or gradual displacement of the suture, even separation from the spherical wall and dislocation in eyes along with the artificial crystal, often needs secondary operation, adjusts the position of the artificial crystal or takes out the artificial crystal for suturing again, influences the operation effect, increases the operation times and brings unnecessary pain to patients.

Disclosure of Invention

The invention aims to provide a posterior chamber type artificial lens to solve the technical defects in the background technology, and the specific technical scheme is as follows:

a posterior chamber intraocular lens, comprising: the artificial lens is of a one-piece type and comprises a circular optical part, namely an artificial lens body part, and four artificial lens loops which are centrosymmetric, wherein the artificial lens loops are in a hook shape, the inner side of the artificial lens loops contains a plurality of sawtooth-shaped barbs, and the tips of the barbs are closed with the opposite side but not connected.

Preferably, the intraocular lens body and the haptic have an inclination angle of 5 to 10 °.

Preferably, the intraocular lens haptic hook directions are the same side.

Preferably, the intraocular lens haptics are centrosymmetrically angled at 60 ° and 120 °.

Preferably, the intraocular lens body diameter is 7.0 mm.

The invention has the beneficial effects that: the invention provides a posterior chamber type artificial lens, which consists of a body part and four artificial lens loops in central symmetry, can be matched with an eye surface positioning device for more accurate positioning, ensures the accuracy of an artificial lens plane, reduces inclination and deflection, is simple and convenient to operate, and greatly improves the operation efficiency. The periphery of the artificial lens is smooth, and the artificial lens is easy to rotate and adjust the position in the capsular bag when being implanted in the conventional capsular bag; if the intraocular lens needs to be fixed by sewing loops, the suture is easy to slide in when the suture is hung, the intraocular lens loops are in a hook shape, the inner side of each loop contains a plurality of zigzag barbs, the tips of the barbs are closed with the opposite side but not connected, and a plurality of narrowings are formed, so that the suture is easy to enter and difficult to exit. The final force applying position of the artificial lens loop is arc-shaped, which accords with the mechanics principle and ensures that the suture position is stable and is not easy to move. The artificial lens body part and the artificial lens loop part have an inclination angle of 5-10 degrees, so that the possibility of contact friction between the artificial lens and the iris is reduced, and the traveling direction of the fixing line is more consistent with the mechanical principle. The direction of the hook of the artificial lens loop is the same side, so that the front and the back of the artificial lens are easy to identify. The diameter of the intraocular lens body is set to 7.0mm, and a wider fundus can be observed than in most of the intraocular lenses having a diameter of 6.0 mm.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

fig. 2 is a cross-sectional view of an intraocular lens of the present invention.

Description of reference numerals:

10 is an artificial crystal body part; 201 is a first intraocular lens loop;

202 is a second intraocular lens haptic; 203 is a third intraocular lens haptic;

204 is a fourth artificial lens loop; 2010 is a first artificial crystal loop hook;

2011. 2012 is a barb at the inner side of the first artificial crystal loop hook;

2013. 2014 and 2015 are three narrow structures on the inner side of the first artificial crystal loop hook, namely, the barb tip is closed with the opposite side but is not connected with the point;

2016 is the first intraocular lens haptic edge force point;

2026 is the second intraocular lens haptic edge force point;

2046 is a fourth intraocular lens haptic edge force point.

Detailed Description

The following describes in detail specific embodiments of the present invention. All other technical solutions obtained by a person skilled in the art without creative efforts based on the solution of the present invention belong to the protection scope of the present invention.

As shown in FIG. 1, a posterior chamber intraocular lens is a one-piece intraocular lens comprising a circular optic portion, i.e., an intraocular lens body portion 10, and four centrally symmetric intraocular lens haptics, including a first intraocular lens haptic 201, a second intraocular lens haptic 202, a third intraocular lens haptic 203, a fourth intraocular lens haptic 204, the diameter of the intraocular lens body portion 10 being 7.0mm, the centrally symmetric intraocular lens haptics having included angles of 60 DEG and 120 DEG, the intraocular lens body portion 10 and the haptics having an inclination angle of 5 DEG to 10 DEG, the intraocular lens haptics being hook-like, the inner side comprising a plurality of zigzag barbs, the barb tips being closed to the opposite side but not connected thereto, as shown in FIG. 1 in detail by taking the first intraocular lens haptic 201 as an example, the first intraocular lens haptic 201 being hook-like, the hook portion being 2010, the inner side of the first intraocular lens

haptic comprising barbs

2011, 2012, the barb tips being closed to the opposite side but not connected thereto, three

narrow structures

2013, 2014 and 2015 are formed, so that the suture is easy to enter and difficult to exit, and the contact point of the suture and the first artificial crystal loop is the edge stress point 2016 of the first artificial crystal loop. The intraocular lens haptic hook orientations are the same side, and as shown in FIG. 2, the second intraocular lens haptic edge force point 2026 and the fourth intraocular lens haptic edge force point 2046 are symmetrically distributed.

Taking an intraocular lens suture operation as an example:

(1) after the implantation incision position and the suture loop position of the intraocular lens are determined, a corresponding bulbar conjunctiva incision is made, and the surface of the sclera stops bleeding.

(2) A 2.0mm sclera tunnel is made above, and the center is punctured into the anterior chamber and flared.

(3) The locator was positioned 1.75mm from the limbus and made 1/2 thick by about 2.0mm long, 4 scleral grooves parallel to the limbus.

(4) The artificial lens is implanted into the tunnel portal or injected into the injector, two artificial lens loops with an included angle of 60 degrees enter firstly, when the injection is half injected, a sewing needle is vertically punctured into the front of a sclera at the bottom of one of scleral grooves below, the sewing needle is substituted into a suture lantern ring, the depth of the eye is about 4.0mm, the corresponding artificial lens loop hook is sleeved, the thread is brought to the force application point at the edge of the artificial lens loop, and the sclera exits the sewing needle in situ.

(5) The puncture and the lantern ring are sleeved into the other artificial lens loop hook at the lower part and the needle is withdrawn in the same action. The suture is in a loop type, and the suture and the artificial lens do not need to be knotted and fixed. The thread hanging action is completed instantly along with the implantation of the artificial lens in the eye, the artificial lens does not need to stay and knot on the surface of the eye, the time is saved, and the infection probability is reduced. The thread hole of the sewing needle for fixing the artificial lens is close to the needle point, after the eye is positioned exactly, the needle is inserted into the eye from the outside of the eye, the position is accurate, after the lantern ring is sleeved into the lens hook, the sewing needle is withdrawn in the original way, and the line-loop-spherical wall connection is completed. The suture point is accurate, the operation is time-saving, the injury is small, the bleeding probability is small, when the lantern ring is sleeved on the artificial crystal loop hook, the needle is inserted, the thread covering and withdrawing actions can complete loop-thread-spherical wall connection, the mutual interference between the stitches is avoided, so that an operator prefers to fix the artificial crystal at multiple points, and the plane position of the artificial crystal is accurate and stable.

(6) The intraocular lens is pushed on until it is completely inserted into the eye. Because of the preset anti-dislocation suture, the current position of the artificial lens is approximately horizontal and can not be overturned. The bottom of the upper scleral groove is inserted with a needle, and the lantern ring is sleeved with the other 1 hook.

(7) And after the stability is confirmed, removing the preset safety hanging wire. Inserting needle, shrink ring and withdrawing needle, and fixing the fourth artificial lens loop. The four artificial lens loops are centrosymmetric, the acting points of the suture are completely consistent, and the artificial error of knotting position selection is avoided; the fixed suture is a lantern ring, like a movable pulley, and the suture bearing force is 1/2 bearing force of a single line. The artificial lens with four stable lantern rings is equivalent to 8 single lines for fixation, and the stability of the artificial lens is far higher than that of the artificial lens hung by two-point or three-point single line stitching in the past. The four directions are fixed, even if one suture is loosened due to strong external force, the plane position and the stability of the artificial lens cannot be influenced.

(8) And adjusting the suture line until the length of the intraocular segment suture line is consistent in all directions. At the moment, the bottom of the scleral groove is provided with two wire tails of the lantern ring, the two wires are tied into a surgical knot at the bottom of the scleral groove, and the scleral groove wire tail is placed between the two wires in advance before the knot is tied; the scleral groove is sutured, knotted at the bottom of the scleral groove, and the thread is embedded in the scleral groove. The sclera side is a double-line tail, so that not only can a surgical knot be formed by a user, but also the scleral slot suture line can pass under the surgical knot, and double insurance is achieved. The fixing threads of the artificial lens loop are all used for fixing the suture and knotting to bury the suture.

(9) The bulbar conjunctiva is sutured and the operation is completed.

Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.

Claims

1. a posterior chamber type intraocular lens, characterized in that: the intraocular lens is a one-piece type, comprising a circular optical portion, i.e. intraocular lens body portion, and four intraocular lens loops that are centrally symmetric, the intraocular lens The haptics are hook-like and contain multiple serrated barbs on the medial side, and the tips of the barbs are closed but not connected to the opposite side.

2 . The posterior chamber intraocular lens according to claim 1 , wherein an inclination angle of 5° to 10° exists between the body portion of the intraocular lens and the haptic portion. 3 .

3 . The posterior chamber intraocular lens according to claim 1 , wherein the hook direction of the intraocular lens loop is the same side. 4 .

4 . The posterior chamber intraocular lens according to claim 1 or 2 , wherein the center-symmetric included angles of the intraocular lens haptics are 60° and 120°. 5 .

5 . The posterior chamber intraocular lens according to claim 1 or 2 , wherein the diameter of the intraocular lens portion is 7.0 mm. 6 .