CN2451082Y - Cornea propria implantation ring - Google Patents

Abstract

The present up-to-date dioptric operation is basically completed on a cornea; when an excimer laser operation is operated or a fine incision is operated on the cornea with a jewel knife, a postoperative complication can happen more or less. The utility model provides a cornea stroma implantation ring which can overcome the defects of the operation, can be put and taken, can be used for correcting myopia and hyperopia, can overcome astigmatism and is fine after cure. The ring is composed of two sections of half-ring elastic force rings with the same bow-shaped sections and the same diameters. The utility model is characterized in that the corresponding ends of the two sections of half ring elastic force rings are made into joints in a chase mortise structure, and the joints can be combined into a whole ring as well as can be disassembled into two half rings and can be matched with each other. The utility model has the advantages of simple structure, low cost, multiple functions with one ring, convenient operation and good effect after cure.

Description

Corneal stroma is implanted circle

This utility model relates to a kind of ophthalmologic operation equipment, and a kind of implant angle membrane matrix of definitely saying so is in order to obtain myopia correction, hypermetropia and scattered-light equipment.

Cornea accounts for the function about 80% in whole eye refraction system, crooking rate of cornea 48.3D (4830 degree), be positioned at the eyeball foremost again, under the table fiber crops, just can finish operation easily, on cornea so current up-to-date refractive surgery (myopia, hypermetropia, astigmatism etc.) all is to finish substantially.Refractive surgery roughly has at present with several: 1) excimer laser art, it is the photochemical effect that utilizes excimer laser (193nm), accurate cutting angle membrane matrix molecular link, the about 3mm of substrate cutting diameter before cornea central authorities, the about 50 μ m (0.05mm) of thickness, in the hope of the obtain 1 rectification number of degrees of (about 600 degree even higher), though operation accurately, apparatus expensive, expense height and still have certain mistake to rectify and complication such as postoperative dazzle fast; 2) radial keratotomy (RK or small RK), promptly utilize the meticulous blade of gem cutter, other middle part radial incision 4-12 bar outside the 3mm of cornea central authorities, the dark otch that reaches 95% above cornea holostrome, in the hope of flattening slightly, cornea central authorities reduce below myopia and the scattered-light number of degrees 6D (600 degree), though vision was owed problem accurately after operation simply, cheaply, had eyeball uprising power in operation back to reduce, heal.

The purpose of this utility model is: overcome the shortcoming that above-mentioned operation exists, provide a kind of and put desirablely in refractive surgery, get final product the corneal stroma that myopia correction, hypermetropia can overcome astigmatism, favourable prognosis again and implant circle.

The purpose of this utility model realizes by implementing following technical proposals: a kind of corneal stroma is implanted circle, semi-ring elastic ring by two sections equal diameters with identical bow-shaped cross-section is formed, feature is: the corresponding end of two sections semi-ring elastic rings, make the chase mortise structural joint that not only can synthesize whole circle but also can split into semi-ring, be complementary.Its additional technical feature is: 1) on a semi-ring elastic ring end-fitting, equidistant be provided with the shape size identical, in order to regulate to implant the small embossment of loop diameter size, and on its pairing another semi-ring elastic ring end-fitting, then be provided with the little groove that mates in order to the small embossment of regulating implantation loop diameter size with on the aforementioned joint; 2) on the joint of tenon shape semi-ring elastic ring, equidistantly be provided with small embossment and on the joint of notch shape semi-ring elastic ring, be provided with the tenon joint on the little groove that is complementary of small embossment; 3) on the joint of tenon shape semi-ring elastic ring, equidistantly be provided with little groove, and on joint with notch shape semi-ring elastic ring, be provided with tenon shape joint on the small embossment of little groove coupling; 4) diameter of design corner membrane matrix implantation circle is (4-10) mm, and the diameter of section of implanting circle is (0.1-1.0) mm.

Advantage of the present utility model is: can one the many usefulness of circle, can myopia correction, can correct hypermetropia again, also can overcome astigmatism, implant that coil structures is simple, cost is low, operation can be put desirable, easy to use, processing ease, more the back is effective.

This utility model has following accompanying drawing:

Fig. 1 implants the whole vertical view of circle for corneal stroma;

Fig. 2 implants the whole vertical view of circle for corneal stroma;

Fig. 3 implants the circle joint for corneal stroma and amplifies three-dimensional view;

Labelling among the figure: 1 is the semi-ring elastic ring joint with notch shape structure, 2 is semi-ring elastic ring joint notch, 3 is the little groove on the semi-ring elastic ring joint notch medial wall, and 4 is the semi-ring elastic ring joint with tenon shape structure, and 5 is the small embossment on the tenon shape joint.

Embodiment: corneal stroma is implanted the circle material: make (PMMA) by polymethyl methacrylate; Implant circle bow-shaped cross-section diameter: 0.12mm; Implant circle and can be transferred to maximum loop diameter: 6mm; Implant circle and can be transferred to minimum ring diameter: 4.5mm; Implant circle end tenon shape joint: the flat face width 0.04mm of long 1.0mm, high 0.06mm; Implant circle end grooves degree of lip-rounding joint: the long 1.0mm of notch, slot opening 0.04mm, the high 0.06mm of groove; The notch medial wall equidistantly is provided with the little groove of 2 row, 4 rows, flute pitch 0.02mm; 2 row, 4 row's small embossments equidistantly are set, protruding spacing 0.02mm on the tenon shape joint; Corneal stroma is implanted the sideline that has corner angle on the circle slyness of all polishing.

Claims (5)

1, a kind of corneal stroma is implanted circle, semi-ring elastic ring by two sections equal diameters with identical bow-shaped cross-section is formed, it is characterized in that: the corresponding end of two sections semi-ring elastic rings, make the chase mortise structural joint that not only can synthesize whole circle but also can split into semi-ring, mate mutually.

2, implant circle according to the described corneal stroma of claim 1, it is characterized in that: on a semi-ring elastic ring end-fitting, equidistant be provided with the shape size identical, in order to regulate to implant the small embossment of loop diameter size, and on its pairing another semi-ring elastic ring end-fitting, then be provided with the little groove that mates in order to the small embossment of regulating implantation loop diameter size with on the aforementioned joint.

3, implant circle according to the described corneal stroma of claim 2, it is characterized in that: on the joint (4) of tenon shape semi-ring elastic ring, the equidistant small embossment (5) that is provided with, and on the joint (1) of notch shape semi-ring elastic ring, be provided with tenon shape joint (4) on the little groove (3) that is complementary of small embossment (5).

4, implant circle according to the described corneal stroma of claim 2, it is characterized in that: on the joint (4) of tenon shape semi-ring elastic ring, the equidistant little groove (3) that is provided with, and on the joint (1) of notch shape semi-ring elastic ring, be provided with tenon shape joint (4) on the small embossment (5) that is complementary of little groove (3).

5, implant circle according to claim 3,4 described corneal stromas, it is characterized in that: the diameter that corneal stroma is implanted circle is (4-10) mm, and the diameter of section of implanting circle is (0.1-1.0) mm.

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