CN215384898U

CN215384898U - Small-incision intraocular lens with high stability and low posterior capsular opacification rate

Info

Publication number: CN215384898U
Application number: CN202121712166.8U
Authority: CN
Inventors: 张明瑞; 裴秀娟; 赵紫微; 史小文; 郭培丽
Original assignee: TIANJIN CENTURY KANGTAI BIO-MEDICAL ENGINEERING CO LTD
Current assignee: TIANJIN CENTURY KANGTAI BIO-MEDICAL ENGINEERING CO LTD
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-01-04
Anticipated expiration: 2031-07-27

Abstract

The utility model relates to a small incision intraocular lens with high stability and low posterior capsular opacification rate, which comprises an optical area and a loop, wherein the optical area is in a biconvex design, the front surface is an aspheric surface, the rear surface is a spherical surface, the loop is a quadrangular loop and is platy and has the symmetry of up, down and left, the edge of the loop is arc-shaped and can be contacted with a capsular bag to form a plurality of contact arc sections, the thickness of the loop end is 0.4-0.55mm, the thickness of a part a in front of the loop is reduced by 20%, the thickness of a part b in front of the loop is reduced to the thickness of the edge of the optical area and is 0.15-0.2mm, the thickness of a part c behind the loop is reduced by 0-20%, a right-angled boss is formed at the joint of the back of the loop and the rear surface of the optical area, the right-angled boss is 0.1-0.25mm high, and the included angle formed by the square edge of the right-angled boss and the turbid plane of the loop is 90-140 degrees, so that the incidence rate of the posterior capsular bag can be reduced, the corneal incision and the intraocular lens is improved in the human capsular bag, the artificial lens can meet the requirements of patients and has wide application prospect.

Description

Small-incision intraocular lens with high stability and low posterior capsular opacification rate

Technical Field

The utility model relates to the technical field of artificial lenses, in particular to a small-incision artificial lens with high stability and low posterior capsular opacification rate.

Background

As is well known, an intraocular lens is a special lens made of artificial synthetic material for replacing a natural lens which becomes cloudy due to cataract, and with the development of medical technology, a soft intraocular lens has gradually replaced a hard intraocular lens due to the advantage of small wound, and the surgical incision for implanting the hard intraocular lens is large, generally about 6 mm. Because of enlarging the incision, a sewing needle must be added after the operation to ensure the watertight state, so that the suture traction is easy to generate the astigmatism after the operation, and the vision recovery is not ideal. The larger the incision, the greater the postoperative astigmatism. The soft intraocular lens is divided into hydrophilic and hydrophobic parts, is generally called as a foldable intraocular lens, is the most widely applied intraocular lens at present, has the characteristics of foldability, stable material, small implantation incision, high stability and the like, is implanted into the capsular bag through a small incision in cooperation with an injector after being folded, has the incision with the size of 2-3mm generally, and can be automatically unfolded after being implanted into the capsular bag generally.

At present, after cataract surgery, a plurality of complications easily appear, wherein posterior capsular opacification becomes a common complication after the crystalline lens is implanted into human eyes, and the complication is caused by proliferation of crystalline lens epithelial cells to the rear surface of the crystalline lens and the posterior capsule. In order to avoid the complications, it is urgently needed to develop a small incision intraocular lens with high stability and low posterior capsular opacification rate to meet the increasing postoperative requirements of patients.

In view of the above, the present invention is particularly proposed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a small-incision intraocular lens with high stability and low posterior capsular opacification rate, which can reduce the incidence rate of posterior capsular opacification, reduce corneal incision and improve the stability of the intraocular lens in a human eye capsular bag through structural improvement, so that the intraocular lens can meet the requirements of patients, has wide application prospect and is beneficial to popularization and application.

In order to achieve the purpose, the small-incision intraocular lens with high stability and low posterior capsular opacification rate provided by the utility model comprises an optical area and a loop, wherein the optical area is in a biconvex design, the front surface is aspheric, the rear surface is spherical, the loop is a four-corner loop which is plate-shaped and has vertical and horizontal symmetry, the edge of the loop is arc-shaped and can be contacted with a capsular bag to form a plurality of contact arc sections, the thickness of the loop end is 0.4-0.55mm, the thickness of the front a of the loop is reduced by 20%, the thickness of the front b of the loop is reduced to the thickness of the edge of the optical area and is 0.15-0.2mm, the thickness of the rear c of the loop is reduced by 0-20%, a right-angle boss is formed at the joint of the rear surface of the optical area and the rear surface of the loop, the right-angle boss is 0.1-0.25mm high, and the included angle formed by the square edge of the right-angle boss and the plane of the loop is 90-140 °.

Preferably, the square edge of the right-angled boss forms an angle of 90-110 ° with the plane of the haptic.

Preferably, the total diameter of the artificial lens is 10.5-12.0 mm.

Preferably, the total diameter of the intraocular lens is 11-11.5 mm.

Preferably, the thickness of the front face b of the haptic is 0.15-0.19 mm.

Preferably, the haptic front face b is 0.18 a thick.

Preferably, the effective optical zone diameter of the optical zone is 4.5-6.25 mm.

Preferably, the effective optical zone diameter of the optical zone is 5.5-6.0 mm.

Preferably, the material of the intraocular lens is a hydrophilic acrylate.

Preferably, the inner sides of the four corner end parts of the loop are provided with suspended parts.

The small-incision intraocular lens with high stability and low posterior capsular opacification rate provided by the utility model has the following beneficial effects.

1. The utility model adopts the design of the four-corner loop, increases the loop thickness at the loop end, and the edge of the loop is in the shape of an arc and can be contacted with the capsular bag to form a plurality of contact arc sections, thereby increasing the contact area with the capsular bag, increasing the supporting force of the loop end, having good mechanical distribution stability and mechanical uniformity, leading the intraocular lens to have better stability in the capsular bag of the human eye, reducing the occurrence rate of eccentric inclination, and not influencing the overall stability of the intraocular lens due to the thinning of the optical area.

2. The height of the right-angle boss behind the intraocular lens is increased by 1.5-2.5 times compared with the common intraocular lens, the higher the square edge is and the closer the square edge is to the right angle, the migration of lens epithelial cells can be blocked, the increased right-angle square edge not only realizes the design of obvious back projection and can be better jointed with the posterior capsule, the joint gap between the rear surface of the intraocular lens and the posterior capsule membrane is reduced, the proliferation of the lens epithelial cells and the migration of the lens rear surface to the optical area to crawl are blocked, and the incidence rate of posterior capsule opacification is effectively reduced.

3. The material of the utility model is hydrophilic acrylate, the hydrophilic material has good flexibility, good memory recovery capability, small incision, less tissue damage, astigmatism reduction caused by operation, lighter reaction after operation and quicker recovery, and meanwhile, the suture-free technology saves the operation time, avoids the stimulation of local suture to the tissue after operation and reduces the discomfort of patients after operation and other adverse reactions of the suture.

4. The optical area of the utility model is of biconvex design, the front surface is aspheric, and the rear surface is spherical, thus realizing smaller spherical aberration and having good image quality. The thickness of the edge of the optical zone is reduced, so that the thickness of the whole optical zone is reduced, when the injector is matched, the optical zone can be implanted into the capsular bag through a smaller incision, and the incision can be reduced to 1.8-2.0mm during implantation.

Drawings

FIG. 1 is a front view of a high stability, low posterior capsular opacification, small incision intraocular lens provided by the present invention;

figure 2 is a side view of a high stability, low posterior capsular opacification small incision intraocular lens provided by the present invention.

In the figure:

1. the optical area 2, the haptic 3, the position a of the front of the haptic, 4, the position b of the front of the haptic, 5, the position c of the back of the haptic, 6, the square edge of the right-angle boss, 7, the edge of the optical area, 8 and the suspended part.

Detailed Description

The present invention will be further described with reference to the following specific embodiments and accompanying drawings to assist in understanding the contents of the utility model.

Referring to fig. 1-2, there are shown a front view and a side view, respectively, of a high stability, low posterior capsular opacification, small incision intraocular lens provided by the present invention. The small incision intraocular lens with high stability and low posterior capsular opacification rate comprises an optical area 1 and a loop 2, wherein the optical area 1 is of a biconvex design, the front surface is an aspheric surface, and the rear surface is a spherical surface, so that smaller spherical aberration can be realized, and the small incision intraocular lens has good image quality. The loop 2 is a four-corner loop, is plate-shaped and has vertical and horizontal symmetry, the edge of the loop is arc-shaped and can be contacted with the capsular bag to form a plurality of contact arc sections, the thickness of the loop end is 0.4-0.55mm, the front part a of the loop is thinned by 20 percent, the front part b of the loop is thinned to the thickness of the edge 7 of the optical area by 0.15-0.2mm, and the back part c of the loop is thinned by 0-20 percent. The utility model adopts the design of the four-corner loop, increases the loop thickness at the loop end, and the edge of the loop is in the shape of an arc and can be contacted with the capsular bag to form a plurality of contact arc sections, thereby increasing the contact area with the capsular bag, increasing the supporting force of the loop end, having good mechanical distribution stability and mechanical uniformity, leading the intraocular lens to have better stability in the capsular bag of the human eye, reducing the occurrence rate of eccentric inclination, and not influencing the overall stability of the intraocular lens due to the thinning of the optical area 1. The thickness of the optical zone edge 7 is only 0.15-0.2mm, the thickness of the optical zone edge 7 is reduced, so that the thickness of the whole optical zone 1 is reduced, when the injector is matched, the optical zone can be implanted into the capsular bag through a smaller incision, and the incision can be reduced to 1.8-2.0mm during implantation.

The joint of the back of the loop 2 and the back surface of the optical area 1 forms a right-angle boss which is 0.1-0.25mm high, the height of the right-angle boss behind the intraocular lens is increased by 1.5-2.5 times compared with the common intraocular lens, the higher the square edge is and the closer the square edge is to the right angle, the higher the square edge is, the migration of lens epithelial cells can be blocked, the increased right-angle square edge not only realizes the design of obvious back projection and can be better jointed with the posterior capsule, the joint gap between the back surface of the intraocular lens and the posterior capsule membrane is reduced, the proliferation of lens epithelial cells can be blocked and the lens epithelial cells can be prevented from migrating to the back surface of the lens and crawling towards the optical area 1, and the incidence rate of posterior capsule opacification is effectively reduced.

The included angle formed by the square edge 6 of the right-angle boss and the plane of the loop is 90-140 degrees. Preferably, the right angle boss square edge 6 forms an angle of 90-110 with the haptic plane. The total diameter of the artificial lens is 10.5-12.0 mm. Preferably, the total diameter of the intraocular lens is 11-11.5 mm. Preferably, the thickness of the haptic at front b is 0.15-0.19 mm. More preferably, the haptic front face b 4 is 0.18 thick. The effective optical zone diameter of the optical zone 1 is 4.5-6.25 mm. Preferably, the effective optical zone diameter of the optical zone 1 is 5.5-6.0 mm. And suspended parts 8 are arranged on the inner sides of the four corner end parts of the loops 2. The material of the artificial lens is hydrophilic acrylate. The hydrophilic material has good flexibility, good memory recovery capability, small incision, less tissue damage, reduced astigmatism caused by operation, lighter postoperative reaction and quicker recovery, and meanwhile, the suture-free technology saves the operation time, avoids the stimulation of postoperative local sutures to the tissues, and reduces the postoperative discomfort of patients and other adverse reactions of the sutures.

The present invention has been described in detail with reference to specific embodiments, which are provided to assist in understanding the core concepts of the present invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are intended to be included within the scope of the present invention.

Claims

1. The small-incision intraocular lens with high stability and low posterior capsular opacification is characterized by comprising an optical area and a loop, wherein the optical area is in a biconvex design, the front surface is aspheric, the rear surface is spherical, the loop is a four-corner loop and is plate-shaped and has the vertical and horizontal symmetry, the edge of the loop is arc-shaped and can be contacted with a capsular bag to form a plurality of contact arc sections, the thickness of the end of the loop is 0.4-0.55mm, the part a in the front of the loop is thinned by 20%, the part b in the front of the loop is thinned to the thickness of the edge of the optical area and is 0.15-0.2mm, the part c in the rear of the loop is thinned by 0-20%, the joint of the rear of the loop and the rear surface of the optical area forms a right-angle boss, the height of the right-angle boss is 0.1-0.25mm, and the included angle formed by the square edge of the right-angle boss and the plane of the loop is 90-140 degrees.

2. A high stability, low posterior capsular opacified, small incision intraocular lens according to claim 1 wherein said right angle boss square edge forms an angle of 90-110 ° with the haptic plane.

3. A high stability, low posterior capsular opacified, small incision intraocular lens according to claim 2 wherein said intraocular lens has an overall diameter of 10.5-12.0 mm.

4. A high stability, low posterior capsular opacified, small incision intraocular lens according to claim 3 wherein said intraocular lens has an overall diameter of 11-11.5 mm.

5. A high stability low posterior capsular opacified small incision intraocular lens according to claim 4 wherein said haptic front face b is 0.15-0.19mm thick.

6. A high stability low posterior capsular opacified small incision intraocular lens according to claim 5 wherein said haptic front face b is 0.18 thick.

7. A high stability, low posterior capsular opacified, small incision intraocular lens according to claim 6 wherein the optical zone has an effective optical zone diameter of 4.5-6.25 mm.

8. A high stability, low posterior capsular opacified, small incision intraocular lens according to claim 7 wherein said optic zone has an effective optic zone diameter of 5.5-6.0 mm.

9. A high stability, low posterior capsular opacified, small incision intraocular lens according to claim 8 wherein said intraocular lens material is a hydrophilic acrylate.

10. A high stability, low posterior capsular opacified, small incision intraocular lens according to claim 9 wherein said haptics have suspensions located inwardly of the four corner ends.