CN202446299U - Posterior chamber intraocular lens - Google Patents
Posterior chamber intraocular lens Download PDFInfo
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- CN202446299U CN202446299U CN2012200251720U CN201220025172U CN202446299U CN 202446299 U CN202446299 U CN 202446299U CN 2012200251720 U CN2012200251720 U CN 2012200251720U CN 201220025172 U CN201220025172 U CN 201220025172U CN 202446299 U CN202446299 U CN 202446299U
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Abstract
The utility model discloses a posterior chamber intraocular lens. The posterior chamber intraocular lens comprises an optical portion and at least two loops, wherein the optical portion is composed of an optical part and an optical part edge, the loops are connected with the optical portion, the rear surface of the optical part is a convex spherical surface, and the radius of curvature of the optical part is in a range from 6.6mm to 80.0mm. Compared with posterior chamber intraocular lenses in prior art, the posterior chamber intraocular lens has the advantages that the design of height protrusion (small radius of curvature) of the rear surface of the optical part is utilized by the optical part of the posterior chamber intraocular lens, a distance between the rear surface of the intraocular lens optical part rear surface and a posterior capsule is reduced, the stability of a spatial position of the intraocular lens in a capsular bag is improved, square edge effects of the optical part edge of the intraocular lens can be preferably reflected, and the incidence of posterior capsule opacification (PCO) after the intraocular lens is implanted can be reduced; the front surface of the optical part is slightly flat, so that intraocular lens loops (particularly one-piece posterior chamber intraocular lens loops) are not tightly compressed on the front surface of the optical part when the intraocular lens loops are folded, and the intraocular lens is easy to spread after the intraocular lens is implanted in eyes and a mutual adhesion between the loops and the optical part is prevented.
Description
Technical field
This utility model relates generally to posterior chamber intraocular lens.Particularly, this utility model relates to and a kind ofly can improve the artificial intraocular lenses in the stability of capsule bag spatial location and can reduce the obviously protruding posterior chamber intraocular lens in surface after the optic of the sickness rate that the artificial intraocular lenses implants back back capsule muddy (PCO).
Background technology
Artificial intraocular lenses (IOL) is a kind of artificial lens that can implant ophthalmic, is used for replacing the mineral crystal that becomes the human eye of muddiness because of the cataract disease, perhaps is used for refractive surgery to correct the vision of human eye.Artificial intraocular lenses's form normally is made up of a circular opticator and the haptic that is arranged on periphery.Artificial intraocular lenses's opticator is made up of optic and optic edge.Artificial intraocular lenses by soft material is processed also often is known as collapsible artificial intraocular lenses, can be folding or curl and implant ophthalmic through a less otch (from less than 2 millimeters to 3 millimeters) after dwindling its area.This folding or curl after the artificial intraocular lenses can launch automatically after getting into eyes.
Press the combination of opticator and haptic, soft collapsible artificial intraocular lenses is divided into single type and three-member type usually.The soft collapsible artificial intraocular lenses of single type, its opticator and haptic are an integral body, are processed by same flexible material.The soft collapsible artificial intraocular lenses of three-member type, its opticator and haptic are processed through split earlier, and then are connected into shape.
The flexible material that is used to prepare collapsible artificial intraocular lenses at present mainly is divided into several types of silica gel, hydrophilic acrylate's (hydrogel), hydrophobic acrylic acid's ester and polymethyl methacrylates (PMMA) etc.Hydrophobic acrylic acid's ester is present most popular artificial crystal material.After having the refraction index height and fold, it opens the moderate advantage of speed.Such as the method for preparing that in United States Patent (USP) 4834750,5290892 and 5814680, has provided several kinds of different hydrophobic acrylic acid's ester artificial crystal materials.
Posterior chamber intraocular lens 1 (hereinafter also can abbreviate " artificial intraocular lenses " as) maintains the relative position in people's camera oculi posterior capsule bag 12 in the back through the interaction force between haptic 5 and the capsule bag 12 in by the implantation human eye.The contraction of capsule bag and varicose act on the haptic, and the artificial intraocular lenses who links to each other with haptic is squeezed or stretches, and will move forward and backward along axis oculi direction D-D '.Artificial intraocular lenses 1 opticator 2 is formed a dioptric system jointly with the cornea of human eye 11, bears the refractive power of human eye about 30%, and is as shown in Figure 1.Here explain; When light was injected into the different material of another kind of optical density by a kind of material, the direction of propagation of its light produced deviation, and this phenomenon is called the dioptric phenomenon; Diopter is represented the size (refractive power) of this dioptric phenomenon, and unit is diopter (being abbreviated as " D ").The 1D refractive power is equivalent to and can parallel rays be focused on 1 meter focal length.The effect of the eyes refracted ray light of complaining about being wronged is represented the ability of dioptric also to be called diopter with focal power.Diopter is that lens are for ray refraction intensity.Diopter is the size unit of refractive power, representes with D, has both referred to parallel rays through this refractive material, and becoming the refractive power of focus this refractive material when 1M is 1 diopter or 1D.For lens, the unit that is meant power of lens is during like the focal length 1M of lens, and then the refractive power of this eyeglass is that 1D diopter and focal length are inversely proportional to.The refractive power F=1/f of lens, wherein f is the focal length of lens, and in the formula: the dioptric unit of force is a diopter, and symbol is D, and dimension is L
-1, 1D=1m
-1
In the human eye dioptric system, spherical aberration is to influence the most important factor of image quality, and through calculating the radius of curvature can obtain artificial intraocular lenses's spherical aberration optical surface hour, and the optical surface radius of curvature of calculating gained is relevant with the refractive index of artificial crystal material.Artificial intraocular lenses's spherical aberration that table 1 has provided two kinds of different refractivities two sides radius of curvature hour.The formula that adopts during calculating:
Wherein:
Artificial intraocular lenses's spherical aberration of two kinds of different refractivities of table 1 two sides radius of curvature hour
For the artificial intraocular lenses 1 of given refractive power, given refractive index, its spherical aberration is parabolic type and changes, and is as shown in Figure 2.In curve chart as shown in Figure 2, abscissa ρ
1Inverse (the ρ of the radius of curvature of expression intraocular lens optic portion front surface
1More little, anterior optic surface is smooth more), the ρ of different sizes
1Corresponding with prior art artificial intraocular lenses substantially with the design of different facial shape; Vertical coordinate δ L
0 'The size of expression spherical aberration.Visible by Fig. 2 and table 1, the face shape of artificial intraocular lenses's optic 3 can influence image quality significantly.For with spherical aberration (δ L
0 'Thereby) reducing to minimum degree raising image quality, prior art sphere artificial intraocular lenses's face shape is generally plano-convex (anterior optic surface is that the surface is the plane after convex and the optic) or little back protruding (anterior optic surface is a surperficial dimpling after convex and the optic).Approaching in artificial intraocular lenses's front and rear surfaces radius of curvature type of prior art and the table 1, back surface is tending towards smooth, the front surface protrusion obviously, the front surface radius of curvature is generally less than the surface, back.Clinical implanting result also shows, the protruding flat or tangible optic structure imaging of the lordosis better quality of sphere artificial intraocular lenses.So at present a lot of artificial intraocular lensess select to adopt these two kinds common face shape designs.
Back capsule is muddy, is also referred to as the secondary cataract, is that the artificial intraocular lenses implants a kind of common complication in back.Back capsule muddiness is because cause between the capsule residual lens epithelial cell proliferation is moved to the artificial intraocular lenses behind the cataract operation back surface and back.Optic the artificial intraocular lenses adopts the sharp right edge designs, like United States Patent (USP) 6,162; 249 and 6,468,306; Be proved to be a kind of and can have effectively reduced the muddy method of back capsule because this design can stop the lens epithelial cell migration between artificial intraocular lenses's the back surface and back capsule (referring to people's such as Buehl article, Journal of Cataract and Refractive Surgery; 34 volumes, the 1976-1985 page or leaf).This sharp right edge designs realizes than being easier on the three-member type artificial intraocular lenses, because haptic is very thin, and is inserted on the optic.On the single type artificial intraocular lenses, realize relatively difficulty of sharp right edge designs, because its haptic and optic are connected as a single entity, and because haptic is that soft material is processed, the broad that need do is thicker.On the single type artificial intraocular lenses, realize the sharp right edge designs, the edge of optic is thick, and haptic will approach, and perhaps square edge step drop is little.If the edge of optic is too thick, can increase artificial intraocular lenses's cumulative volume, strengthen the difficulty of small incision surgery; If haptic is too thin, the active force between it and the capsule is not enough, and the artificial intraocular lenses can be built on the sand in capsule; If square edge step drop is too little, the migration that stops the lens epithelial cell is not had effect.
Prior art sphere artificial intraocular lenses is because after the optic protruding not obvious (even being flat shape); Thereby leaving big space behind surface and the human eye behind the artificial intraocular lenses between the capsule after can causing implanting in the human eye; The location of both having caused the artificial intraocular lenses also makes postoperative be prone to take place the muddy phenomenon of back capsule built on the sand.Even if the artificial intraocular lenses has adopted at the edge right-angle side (square limit) design; When the ciliary muscle of human eye is far seen and closely shunk varicose automatically when regulating seeing; Under the vitreous body extruding, drive moving forward and backward of back capsule mould; The root area of artificial intraocular lenses's haptic is brought into PCO in artificial intraocular lenses's the optic edge through flowing of aqueous humor the extruding and the uneven tractive of back cyst membrane.
Therefore; For the those skilled in the art, a kind of good artificial intraocular lenses's design is except image quality; Also need guarantee the stability of artificial intraocular lenses in capsule; Reduce the muddy probability of back capsule, guarantee that the artificial intraocular lenses can in time open, and the phenomenon that haptic and optic bond together can not take place after implanting eyes.
The utility model content
This utility model proposes in view of the above problems, and its purpose is to provide a kind of can improve the artificial intraocular lenses in the stability of capsule bag spatial location and can reduce the obviously protruding posterior chamber intraocular lens in surface after the optic of the sickness rate that the artificial intraocular lenses implants back PCO.
Term definition
The term " opticator " that uses in this application is that optic and the optic edge by the artificial intraocular lenses constitutes.
The term " optic " that uses in this application thus refer to the part that optical characteristics can realize regulating the dioptric major function of artificial intraocular lenses that has that is positioned at intraocular lens optic part center.Particularly, the diameter of employed artificial intraocular lenses's opticator is about 6 millimeters among this utility model embodiment, and wherein optic refers to 5.0 millimeters of artificial intraocular lenses's bores with interior part.
The term " optic edge " that uses in this application refers to and is arranged on the peripheral marginal area that can not influence artificial intraocular lenses's optical characteristics of intraocular lens optic portion.Particularly; The diameter of employed artificial intraocular lenses's opticator is about 6 millimeters among this utility model embodiment; Wherein the optic edge refers to apart from the optic center optic marginal portion outside 2.5 millimeters (or artificial intraocular lenses's bore 5.0 millimeters), shown in drawing reference numeral among Fig. 34.Those skilled in the art's easy to understand: for for the artificial intraocular lenses of other size, the optic edge correspondingly may be different apart from the distance at optic center for optic diameter.
The term that uses in this application " surface after the optic " refers in that the artificial intraocular lenses to be implanted the optic that capsule contacts behind the back and human eye in the human eye surperficial.
The term " anterior optic surface " that uses in this application refers to is implanting the artificial intraocular lenses in the human eye optic surface that the relative capsule behind the human eye in surface behind the back and optic is provided with.
The term " button loop " that uses in this application refers to intraocular lens optic and partly links to each other, not only plays the effect of support of optical part but also play the part that the contractility that contraction and varicose produced of ciliary muscle is delivered to the effect of said opticator.
Use the term for example " preceding " of expression position relation in this application, " back " is for the distance of capsule behind the human eye.For example, for the adjustable focus artificial intraocular lenses that two optical surfaces are regulated, " surface after the optic " is the optical surface nearer apart from capsule behind the human eye than " anterior optic surface ".
Use the term for example " protruding " of expression shape in this application, " recessed " is for the longitudinal median plane of intraocular lens optic part.For example, " artificial intraocular lenses of back convex form " to mean after this artificial intraocular lenses's the optic that the point near more apart from this centre of surface gone up on the surface far away more with the distance of this intraocular lens optic longitudinal median plane partly.
An aspect according to this utility model provides a kind of posterior chamber intraocular lens, and said posterior chamber intraocular lens comprises: the opticator that is made up of optic and optic edge; At least two buttons loop that are connected with said opticator is characterized in that, the back surface of said optic is that convex spherical and its radius of curvature can be in 6.6 millimeters-80.0 millimeters scopes.
In a preferred embodiment of this utility model, the front surface of said optic is that convex spherical and its radius of curvature can be in 7.1 millimeters-84.0 millimeters scopes.
In another preferred embodiment of this utility model; Said posterior chamber intraocular lens can be processed by hydrophobic acrylic acid's ester; The radius of curvature on the back surface of said optic can be in 7.5 millimeters-55.0 millimeters scope, and the radius of curvature of the front surface of said optic can be in 8.0 millimeters-74.0 millimeters scope.Preferably, the radius of curvature on the back surface of said optic is in 8.1 millimeters-19.5 millimeters scope.More preferably, the radius of curvature on the back surface of said optic is approximately 11.1 millimeters.
In another preferred embodiment of this utility model; Said posterior chamber intraocular lens can be processed by hydrophobic acrylic acid's ester; The radius of curvature on the back surface of said optic can be in 7.0 millimeters-70.0 millimeters scope, and the radius of curvature of the front surface of said optic can be in 17.0 millimeters-73.0 millimeters scope.Preferably, the radius of curvature on the back surface of said optic is in 7.6 millimeters-16.5 millimeters scope.More preferably, the radius of curvature on the back surface of said optic is approximately 10.6 millimeters.
In another preferred embodiment of this utility model; Said posterior chamber intraocular lens can be processed by silica gel or hydrogel; The radius of curvature on the back surface of said optic can be in 6.6 millimeters-48.0 millimeters scope, and the radius of curvature of the front surface of said optic can be in 7.1 millimeters-48.6 millimeters scope.Preferably, the radius of curvature on the back surface of said optic is in 7.5 millimeters-10.0 millimeters scope.More preferably, the radius of curvature on the back surface of said optic is approximately 8.0 millimeters.
In another preferred embodiment of this utility model; Said posterior chamber intraocular lens can be processed by hydrophobic acrylic acid's ester; The radius of curvature on the back surface of said optic can be in 7.0 millimeters-52.0 millimeters scope, and the radius of curvature of the front surface of said optic can be in 7.8 millimeters-59.0 millimeters scope.Preferably, the radius of curvature on the back surface of said optic is in 7.0 millimeters-11.0 millimeters scope.More preferably, the radius of curvature on the back surface of said optic is approximately 8.5 millimeters.
In another preferred embodiment of this utility model; Said posterior chamber intraocular lens can be processed by polymethyl methacrylate (PMMA); The radius of curvature on the back surface of said optic can be in 6.8 millimeters-59.5 millimeters scope, and the radius of curvature of the front surface of said optic can be in 10.9 millimeters-60.0 millimeters scope.Preferably, the radius of curvature on the back surface of said optic is in 7.0 millimeters-13.1 millimeters scope.More preferably, the radius of curvature on the back surface of said optic is approximately 9.0 millimeters.
In another preferred embodiment of this utility model; Said posterior chamber intraocular lens can be processed by hydrophobic acrylic acid's ester; The radius of curvature on the back surface of said optic can be in 7.0 millimeters-66.0 millimeters scope, and the radius of curvature of the front surface of said optic can be in 14.4 millimeters-74.0 millimeters scope.Preferably, the radius of curvature on the back surface of said optic is in 7.2 millimeters-15.3 millimeters scope.More preferably, the radius of curvature on the back surface of said optic is approximately 9.9 millimeters.
In another preferred embodiment of this utility model; Said posterior chamber intraocular lens can be processed by hydrophobic acrylic acid's ester; The radius of curvature on the back surface of said optic can be in 7.0 millimeters-80.0 millimeters scope, and the radius of curvature of the front surface of said optic can be in 30.8 millimeters-84.0 millimeters scope.Preferably, the radius of curvature on the back surface of said optic is in 9.0 millimeters-20.3 millimeters scope.More preferably, the radius of curvature on the back surface of said optic is approximately 12.7 millimeters.
In another preferred embodiment of this utility model, the radius of curvature on the back surface of said optic can be less than the radius of curvature of the front surface of said optic.
Preferably, the radius of curvature on the back surface of said optic can be the 17.8%-60.0% of radius of curvature of the front surface of said optic.
More preferably, the radius of curvature on the back surface of said optic can be the 20.0%-45.6% of radius of curvature of the front surface of said optic.
In another preferred embodiment of this utility model, said posterior chamber intraocular lens can be the single type artificial intraocular lenses.
In another preferred embodiment of this utility model, said posterior chamber intraocular lens can be the three-member type artificial intraocular lenses.
In another preferred embodiment of this utility model, said button loop circumferentially can link to each other with said optic edge around said opticator symmetrically.
In another preferred embodiment of this utility model, said button loop can link to each other with said opticator front surface.
Compare with present posterior chamber intraocular lens of the prior art; The optic of the posterior chamber intraocular lens of this utility model adopts the design of back apparent height protruding (small curvature radius); Reduce after the intraocular lens optic portion surface and the back distance between the capsule; Improve the stability of artificial intraocular lenses, the advantage of the square limit effect at intraocular lens optic portion edge is embodied better, and reduce the sickness rate that the artificial intraocular lenses implants back PCO in capsule bag spatial location; Again because anterior optic surface is slightly flat; Make the artificial intraocular lenses fasten with a rope, string, etc. (especially for the button loop of single type posterior chamber intraocular lens) when folding, can tightly do not oppressed on anterior optic surface, be easier to after implanting ophthalmic, launch and can haptic do not take place and optic is inter-adhesive.
Description of drawings
According to following accompanying drawing and explanation, the characteristic of this utility model, advantage will become more clear, wherein:
Fig. 1 schematically shows the basic comprising of human eye dioptric system;
Fig. 2 schematically shows the prior art artificial intraocular lenses's with different face structures spherical aberration size (δ L
0 ') curve chart that distributes;
Fig. 3 is the perspective schematic view from the single type posterior chamber intraocular lens of the observed embodiment according to this utility model of artificial intraocular lenses's front surface, and wherein button loop launches and be not folded on the front surface of intraocular lens optic part;
Fig. 4 be from surface observation behind the artificial intraocular lenses to the perspective schematic view according to the single type posterior chamber intraocular lens of the embodiment of this utility model, wherein button loop launches and is not folded on the front surface of intraocular lens optic part;
Fig. 5 is the profile according to the single type posterior chamber intraocular lens of an embodiment of this utility model, and wherein button loop has been folded on the front surface of intraocular lens optic part;
Fig. 6 implants after the optic of the prior art posterior chamber intraocular lens in the human eye surface and the back sketch map of the interactively between the cyst membrane when the capsule bag is in contraction state;
Fig. 7 implants after the optic of single type posterior chamber intraocular lens of this utility model in the human eye surface and the back sketch map of the interactively between the cyst membrane when the capsule bag is in contraction state;
Fig. 8 schematically shows in detail the mutual interactively on surface and back cyst membrane after the optic of the prior art posterior chamber intraocular lens shown in the circle G among Fig. 6;
Fig. 9 schematically shows in detail the mutual interactively on surface and back cyst membrane after the optic of the single type posterior chamber intraocular lens of this utility model shown in the circle H among Fig. 7;
Figure 10 schematically shows before implanting human eye with the form of profile, and the button loop of the single type posterior chamber intraocular lens of prior art turns down the situation on the anterior optic surface; With
Figure 11 schematically shows before implanting human eye with the form of profile, and the button loop of the single type posterior chamber intraocular lens of this utility model turns down the situation on the anterior optic surface.
In the application's accompanying drawing, use identical drawing reference numeral to represent same or analogous element.
The drawing reference numeral explanation
1 posterior chamber intraocular lens
2 opticators
3 optic
4 optic edges
5 buttons loop
6 anterior optic surface
Surface after 7 optic
The longitudinal median plane of 8 intraocular lens optics part
9 back capsules (film)
10 spaces
11 corneas
12 capsule bags
13 turnover spaces
D-D ' axis oculi direction.
The specific embodiment
Following specific embodiment just is used for further this utility model being explained further, but this utility model is not limited to following specific embodiments.Any variation on these embodiment bases as long as meet the spirit and the scope of this utility model, all will fall in the covering scope of this utility model patent.
Fig. 3 is the perspective schematic view from the single type posterior chamber intraocular lens 1 of the observed embodiment according to this utility model of artificial intraocular lenses's front surface.Fig. 4 be from surface observation behind the artificial intraocular lenses to the perspective schematic view according to the single type posterior chamber intraocular lens of the embodiment of this utility model.Shown in Fig. 3 and Fig. 4, posterior chamber intraocular lens 1 comprises: the haptic 5 that the opticator 2 that is made up of optic 3 and optic edge 4 and two and said opticator 2 are integrally formed.Certainly, the those skilled in the art is understood that the number of said button loop 5 also can preferably be less than six more than two.Said button loop 5 circumferentially is arranged on symmetrically on the optic edge 4 and with the front surface of said opticator around said opticator 2 and links to each other.Certainly, the those skilled in the art is understood that button loop 5 also can link to each other around said opticator 2 circumferential being arranged on symmetrically on the optic edge 4 and with the side one of said opticator.Back surperficial 7 of said optic 3 is that the front surface 6 of convex spherical and said optic 3 also is convex spherical.Shown in Fig. 3 and Fig. 4, the button loop 5 of single type posterior chamber intraocular lens 1 is deployed condition and is not folded on the front surface of intraocular lens optic part 2.
Fig. 5 is the profile according to the single type posterior chamber intraocular lens 1 of an embodiment of this utility model, wherein fastens with a rope, string, etc. 5 to be folded on the front surface of intraocular lens optic part 2.From this figure, can more clearly see: surface 7 is convex spherical after the anterior optic surface 6 of posterior chamber intraocular lens 1 and the optic.
Fig. 6 implants after the optic of posterior chamber intraocular lens 1 of the prior art in the human eye surface 7 and the back sketch map of the interactively between the cyst membrane 9 when the capsule bag is in contraction state.The optic face shape of the posterior chamber intraocular lens 1 of prior art shown in Figure 6 is little convex (being that anterior optic surface is a surperficial dimpling after convex and the optic).After the posterior chamber intraocular lens 1 with prior art shown in Figure 6 was implanted in the human eye, prior art posterior chamber intraocular lens 1 maintained the relative position in people's camera oculi posterior capsule bag through the interaction force between haptic 5 and the capsule bag 12.The contraction of capsule bag and varicose act on the haptic 5, and the artificial intraocular lenses 1 who links to each other with haptic 5 is squeezed or stretches, and will move forward and backward along axis oculi direction D-D '.Because surperficial dimpling after the optic of prior art posterior chamber intraocular lens 1 (or be close to flat); Therefore in back room, be squeezed or during stretching action when the prior art posterior chamber intraocular lens 1 in the implantation human eye; There is space 10 more or less between the cyst membrane 9 behind surface and the human eye after the optic of prior art posterior chamber intraocular lens 1; Movably spatial dimension S was bigger under the effect of contractility P for the prior art posterior chamber intraocular lens when capsule bag shrank; Can cause thus after the optic of posterior chamber intraocular lens 1 of prior art that the applying between the cyst membrane 9 contacts instability behind the surface 7 and human eye; And then can make after residual lens epithelial cell proliferation is through optic behind the cataract operation space 10 between the cyst membrane 9 behind the surface and human eye be easy to move to after the optic of technological posterior chamber intraocular lens the surface and afterwards between the capsule; Thus, postoperative is prone to take place the phenomenon of back capsule muddy (PCO).
Fig. 7 implants after the optic of posterior chamber intraocular lens 1 of this utility model in the human eye surface 7 and the back sketch map of the interactively between the cyst membrane 9 when the capsule bag is in contraction state.Compare with the convexity on surface after the optic of the posterior chamber intraocular lens 1 of prior art shown in Figure 6, surperficial evagination is more obvious after the optic of the posterior chamber intraocular lens 1 of this utility model shown in Figure 7.After the posterior chamber intraocular lens 1 with this utility model shown in Figure 7 was implanted in the human eye, prior art posterior chamber intraocular lens 1 maintained the relative position in people's camera oculi posterior capsule bag through the interaction force between haptic 5 and the capsule bag.The contraction of capsule bag and varicose act on the haptic 5, and the artificial intraocular lenses 1 who links to each other with haptic 5 is squeezed or stretches, and will move forward and backward along axis oculi direction D-D '.Compare with common prior art artificial intraocular lenses; Gap after the intraocular lens optic portion of the high back convex of this utility model as shown in Figure 7 between surface and the back capsule is littler; When the capsule bag shrinks under the effect of contractility P the artificial intraocular lenses movably spatial dimension S is less relatively, improve the stability of crystal position in the capsule bag thus.Particularly; Because surperficial evagination is obvious relatively after the artificial intraocular lenses's 1 of this utility model shown in Figure 7 optic; Therefore in back room, be squeezed or during stretching action when the posterior chamber intraocular lens 1 of this utility model in the implantation human eye; After the optic of the posterior chamber intraocular lens 1 of this utility model behind surface and the human eye space 10 between the cyst membrane 9 be reduced to minimum degree; Making after the optic of posterior chamber intraocular lens 1 of this utility model that cyst membrane 9 can be fitted better behind the surface and human eye contacts; It is more stable to cause after the optic of posterior chamber intraocular lens 1 of prior art behind the surface 7 and human eye the applying between the cyst membrane 9 contact thus, so can hinder lens epithelial cell proliferation residual behind the cataract operation through optic after behind surface and the human eye space 10 between the cyst membrane 9 move to after the optic of technological posterior chamber intraocular lens surperficial and afterwards between the capsule.This shows that the apparent height convexity can reduce the gap of back capsule and optic after the intraocular lens optic portion, reduce migration of epithelial cells to artificial intraocular lenses's back surface and the chance between the capsule of back, thereby reduce the sickness rate that the artificial intraocular lenses implants back PCO.
Fig. 8 schematically shows in detail the mutual interactively on surface and back cyst membrane after the optic of the prior art posterior chamber intraocular lens shown in the circle G among Fig. 6.Fig. 9 schematically shows in detail the mutual interactively on surface and back cyst membrane after the optic of the single type posterior chamber intraocular lens of this utility model shown in the circle H among Fig. 7.It is that limit, artificial intraocular lenses edge side can compress back cyst membrane 9 that the square limit design that the intraocular lens optic portion edge 4 of prior art is adopted stops the precondition of the growth of PCO, could stop the migration of lens epithelial cell to be flowed thus better.Can draw with Fig. 9 through comparison diagram 8: than the prior art posterior chamber intraocular lens; Because the surface can more closely contact with the back cyst membrane after the optic of the posterior chamber intraocular lens of this utility model; Make the posterior chamber intraocular lens of this utility model in the capsule of back, more firmly locate, the protruding face shape design of the back apparent height of the posterior chamber intraocular lens optic of this utility model can make the advantage of the square limit effect at intraocular lens optic portion edge embodied better thus.
Carrying out the artificial intraocular lenses when implanting, need the artificial intraocular lenses be packed into imports head and undergos surgery, and can turn over the action of button loop usually.Figure 10 schematically shows before implanting human eye with the form of profile, and the button loop of the single type posterior chamber intraocular lens of prior art turns down the situation on the anterior optic surface.Figure 11 schematically shows before implanting human eye with the form of profile, and the button loop of the single type posterior chamber intraocular lens of this utility model turns down the situation on the anterior optic surface.The single type artificial intraocular lenses implants and need haptic be turned down on the front surface 6 of intraocular lens optic part as last, thereby the thimble of avoiding implantation device is promoting artificial intraocular lenses's damage button loop 5 when advancing.Can notice through contrast Figure 10 and Figure 11: if the front surface of intraocular lens optic part is too protruding; Can cause button loop to be close to the front surface of intraocular lens optic part when turning over button loop; Make that turnover space 13 is less, the adhesion tension of the front surface of button loop and opticator.When the artificial intraocular lenses was released from import head, button loop 5 was not easy to launch.Because the protruding face shape design of the height on surface 7 after the optic of the single type posterior chamber intraocular lens 1 of this utility model; Make that the front surface 6 of opticator comparatively speaking can be more flat; Thereby contact area and active force between the button loop after having reduced to turn down and the front surface 6 of opticator make that turnover space 13 is bigger.Therefore the protruding face shape design of the height on surface 7 also can make after the single type posterior chamber intraocular lens 1 with this utility model is implanted in the human eye after the optic of the single type posterior chamber intraocular lens 1 of this utility model; The button loop that folds on the front surface 6 of opticator of single type posterior chamber intraocular lens 1 of this utility model launches more easily, has reduced the together inter-adhesive and risk that can not successfully open automatically very much of haptic and intraocular lens optic portion.
In addition, the those skilled in the art can also recognize: the obviously protruding posterior chamber intraocular lens in surface both can be the single type artificial intraocular lenses described in top embodiment after the optic of this utility model, also can be the three-member type artificial intraocular lenses.For the three-member type artificial intraocular lenses, the single type artificial intraocular lenses's who describes among the face shape design feature of its optic and the above embodiment situation is similar, just repeats no more at this.Than the prior art posterior chamber intraocular lens; The apparent height convexity can reduce to implant the gap between back back capsule and the optic equally after the three-member type posterior chamber intraocular lens optic of this utility model; Reduce migration of epithelial cells to three-member type artificial intraocular lenses's back surface and the chance between the capsule of back, thereby reduce the sickness rate that the three-member type posterior chamber intraocular lens is implanted back PCO.In addition; After the optic of this utility model the surface obviously after the optic of protruding three-member type posterior chamber intraocular lens the surface can more closely contact with the back cyst membrane equally; Make it in the capsule of back, more firmly locate, and then the advantage of the square limit effect at intraocular lens optic portion edge is embodied better.
Because the posterior chamber intraocular lens optic surface of this utility model all has spherical shape, therefore can use optic surperficial radius of curvature in artificial intraocular lenses front and back to come the face shape on the posterior chamber intraocular lens optic surface of direct representation this utility model.Listed the face shape design example on the optic surface of the posterior chamber intraocular lens that adopts this utility model that different materials processes in the following table 2, the refractive index of following these materials that posterior chamber intraocular lens adopted of this utility model is all between 1.45 to 1.56.In addition, the center thickness of the optic of the posterior chamber intraocular lens of this utility model in 0.3 millimeter-1.2 millimeters scope and the thickness at optic edge in 0.3 millimeter-0.6 millimeter scope." center thickness of optic " refers to the thickness in thickness in the middle of the optic of posterior chamber intraocular lens of this utility model; And " thickness at optic edge " refers to the measured thickness of optic and optic edge transition position at the posterior chamber intraocular lens of this utility model.Be well known that for the those skilled in the art: the size of the thickness at the optic edge of the size of the center thickness of the optic of the posterior chamber intraocular lens of this utility model and the posterior chamber intraocular lens of this utility model depends on material of being selected for use and the diopter that is reached.These artificial intraocular lensess of the face shape design with the listed optic surface of table 2 of this utility model all can reach the diopter of 5.0D-36.0D.
The optic face shape design example of the posterior chamber intraocular lens of table 2 this utility model
From table 2, can see: the radius of curvature on surface is roughly in 6.6 millimeters-80.0 millimeters scope after the posterior chamber intraocular lens optic of this utility model.The radius of curvature of the posterior chamber intraocular lens anterior optic surface of this utility model is roughly in 7.1 millimeters-84.0 millimeters scope.
In instance 1; In another preferred embodiment of this utility model; Posterior chamber intraocular lens is that 1.46 silica gel or hydrogel are processed by refractive index, and for example this material once was used to prepare the SI40NB silica gel artificial intraocular lenses of U.S.'s Allergan (AMO) company and the Akreos artificial crystal of hydrogel of Baushe & Lomb (bausch and Lomb) company.Can see that from table 2 radius of curvature surperficial after the optic of this posterior chamber intraocular lens is in 6.6 millimeters-48.0 millimeters scope, and the radius of curvature of the anterior optic surface of this posterior chamber intraocular lens is in 7.1 millimeters-48.6 millimeters scope.Consider that from this angle of above-mentioned beneficial effect that realizes this utility model better the radius of curvature on the back surface of said optic is preferably in 7.5 millimeters-10.0 millimeters scope.The radius of curvature on the back surface of said optic more preferably is approximately 8.0 millimeters.
In instance 2, posterior chamber intraocular lens is that hydrophobic acrylic acid's ester of 1.47 is processed by refractive index, and for example this material once was used for preparing AR40e type artificial intraocular lenses by U.S. Allergan company (AMO).Can see that from table 2 radius of curvature surperficial after the optic of this posterior chamber intraocular lens is in 7.0 millimeters-52.0 millimeters scope, and the radius of curvature of the anterior optic surface of this posterior chamber intraocular lens is in 7.8 millimeters-59.0 millimeters scope.Consider that from this angle of above-mentioned beneficial effect that realizes this utility model better the radius of curvature on the back surface of said optic is preferably in 7.0 millimeters-11.0 millimeters scope.The radius of curvature on the back surface of said optic more preferably is approximately 8.5 millimeters.
In instance 3, posterior chamber intraocular lens is processed by hydrophobic acrylic acid's ester and this material is obtained by Aibo Nuode (Beijing) Medical Technology Co., Ltd..Can see that from table 2 refractive index of this posterior chamber intraocular lens material is 1.48.Radius of curvature surperficial after the optic of this posterior chamber intraocular lens is in 7.5 millimeters-55.0 millimeters scope, and the radius of curvature of the anterior optic surface of this posterior chamber intraocular lens is in 8.0 millimeters-74.0 millimeters scope.Consider that from this angle of above-mentioned beneficial effect that realizes this utility model better the radius of curvature on the back surface of said optic is preferably in 8.1 millimeters-19.5 millimeters scope.The radius of curvature on the back surface of said optic more preferably is approximately 11.1 millimeters.
In instance 4, posterior chamber intraocular lens is processed by polymethyl methacrylate (PMMA) and this material belongs to a kind of early stage artificial intraocular lenses's preparation material commonly used.Can see that from table 2 refractive index of this posterior chamber intraocular lens material is 1.49.Radius of curvature surperficial after the optic of this posterior chamber intraocular lens is in 6.8 millimeters-59.5 millimeters scope, and the radius of curvature of the anterior optic surface of this posterior chamber intraocular lens is in 10.9 millimeters-60.0 millimeters scope.Consider that from this angle of above-mentioned beneficial effect that realizes this utility model better the radius of curvature on the back surface of said optic is preferably in 7.0 millimeters-13.1 millimeters scope.The radius of curvature on the back surface of said optic more preferably is approximately 9.0 millimeters.
In instance 5, posterior chamber intraocular lens is that hydrophobic acrylic acid's ester of 1.51 is processed by refractive index, and for example this material once was used for preparing AF-1 type artificial intraocular lenses by Japanese Takemasa Co., Ltd. (HOYA).Can see that from table 2 radius of curvature surperficial after the optic of this posterior chamber intraocular lens is in 7.0 millimeters-66.0 millimeters scope, and the radius of curvature of the anterior optic surface of this posterior chamber intraocular lens is in 14.4 millimeters-74.0 millimeters scope.Consider that from this angle of above-mentioned beneficial effect that realizes this utility model better the radius of curvature on the back surface of said optic is preferably in 7.2 millimeters-15.3 millimeters scope.The radius of curvature on the back surface of said optic more preferably is approximately 9.9 millimeters.
In instance 6, posterior chamber intraocular lens is processed by hydrophobic acrylic acid's ester and this material is obtained by Aibo Nuode (Beijing) Medical Technology Co., Ltd..Can see that from table 2 refractive index of this posterior chamber intraocular lens material is 1.52.Radius of curvature surperficial after the optic of this posterior chamber intraocular lens is in 7.0 millimeters-70.0 millimeters scope, and the radius of curvature of the anterior optic surface of this posterior chamber intraocular lens is in 17.0 millimeters-73.0 millimeters scope.Consider that from this angle of above-mentioned beneficial effect that realizes this utility model better the radius of curvature on the back surface of said optic is preferably in 7.6 millimeters-16.5 millimeters scope.The radius of curvature on the back surface of said optic more preferably is approximately 10.6 millimeters.
In instance 7, posterior chamber intraocular lens is that hydrophobic acrylic acid's ester of 1.55 is processed by refractive index, and for example this material once was used for preparing Acrysof series artificial intraocular lenses by U.S. Alcon Universal Ltd. (ALCON).Can see that from table 2 radius of curvature surperficial after the optic of this posterior chamber intraocular lens is in 7.0 millimeters-80.0 millimeters scope, and the radius of curvature of the anterior optic surface of this posterior chamber intraocular lens is in 30.8 millimeters-84.0 millimeters scope.Consider that from this angle of above-mentioned beneficial effect that realizes this utility model better the radius of curvature on the back surface of said optic is preferably in 9.0 millimeters-20.3 millimeters scope.The radius of curvature on the back surface of said optic more preferably is approximately 12.7 millimeters.
In addition, from table 2, can also see: the radius of curvature on surface is less than the radius of curvature of the front surface of said optic after the optic of the posterior chamber intraocular lens of this utility model.Consider that from this angle of the above-mentioned beneficial effect of realizing this utility model better preferably, the radius of curvature on the back surface of said optic is the 17.8%-60.0% of radius of curvature of the front surface of said optic; More preferably, the radius of curvature on the back surface of said optic is the 20.0%-45.6% of radius of curvature of the front surface of said optic.
Certainly, the those skilled in the art also can recognize after reading table 2: the radius of curvature on surface also can be substantially equal to the radius of curvature of the front surface of said optic after the optic of the posterior chamber intraocular lens of this utility model.
In sum; Compare with the posterior chamber intraocular lens of prior art; The optic of the posterior chamber intraocular lens of this utility model adopts the face shape design of back apparent height protruding (small curvature radius), reduces the distance between the surface and capsule bag after the intraocular lens optic portion, and the raising artificial intraocular lenses is in the stability of capsule bag spatial location; The advantage of the square limit effect at intraocular lens optic portion edge is embodied better, and reduce the sickness rate that the artificial intraocular lenses implants back PCO; Again because anterior optic surface is slightly flat; Make the artificial intraocular lenses fasten with a rope, string, etc. (especially for the button loop of single type posterior chamber intraocular lens) when folding, can tightly do not oppressed on anterior optic surface, be easier to after implanting ophthalmic, launch and can haptic do not take place and optic is inter-adhesive.
Embodiment described in the preamble is merely illustrative rather than restrictive.Therefore, under the situation that does not break away from utility model disclosed herein design, the those skilled in the art can make amendment or changes the foregoing description.Therefore, the protection domain of this utility model is only limited the scope of appended claims.
Claims (10)
1. posterior chamber intraocular lens, said posterior chamber intraocular lens comprises:
The opticator that constitutes by optic and optic edge;
At least two buttons loop that are connected with said opticator,
It is characterized in that,
The back surface of said optic is that convex spherical and its radius of curvature are in 6.6 millimeters-80.0 millimeters scope.
2. posterior chamber intraocular lens according to claim 1 is characterized in that, the front surface of said optic is that convex spherical and its radius of curvature are in 7.1 millimeters-84.0 millimeters scope.
3. posterior chamber intraocular lens according to claim 1; It is characterized in that; Said posterior chamber intraocular lens is processed by hydrophobic acrylic acid's ester; The radius of curvature on the back surface of said optic is in 7.5 millimeters-55.0 millimeters scope, and the radius of curvature of the front surface of said optic is in 8.0 millimeters-74.0 millimeters scope.
4. posterior chamber intraocular lens according to claim 3 is characterized in that, the radius of curvature on the back surface of said optic is in 8.1 millimeters-19.5 millimeters scope.
5. posterior chamber intraocular lens according to claim 4 is characterized in that, the radius of curvature on the back surface of said optic is 11.1 millimeters.
6. according to each described posterior chamber intraocular lens among the claim 1-5, it is characterized in that the radius of curvature on the back surface of said optic is less than the radius of curvature of the front surface of said optic.
7. posterior chamber intraocular lens according to claim 6 is characterized in that, the radius of curvature on the back surface of said optic is the 17.8%-60.0% of radius of curvature of the front surface of said optic.
8. posterior chamber intraocular lens according to claim 7 is characterized in that, the radius of curvature on the back surface of said optic is the 20.0%-45.6% of radius of curvature of the front surface of said optic.
9. according to each described posterior chamber intraocular lens among the claim 1-5, it is characterized in that said posterior chamber intraocular lens is the single type artificial intraocular lenses.
10. according to each described posterior chamber intraocular lens among the claim 1-5, it is characterized in that said posterior chamber intraocular lens is the three-member type artificial intraocular lenses.
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| CN2012200251720U CN202446299U (en) | 2012-01-19 | 2012-01-19 | Posterior chamber intraocular lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200251720U CN202446299U (en) | 2012-01-19 | 2012-01-19 | Posterior chamber intraocular lens |
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| CN202446299U true CN202446299U (en) | 2012-09-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103211665A (en) * | 2012-01-19 | 2013-07-24 | 爱博诺德（北京）医疗科技有限公司 | Posterior chamber type artificial crystal |
| WO2013107288A1 (en) * | 2012-01-19 | 2013-07-25 | 爱博诺德（北京）医疗科技有限公司 | Posterior chamber-type intraocular lens |
| CN103919630A (en) * | 2013-01-16 | 2014-07-16 | 九扬贸易有限公司 | Bionic artificial lens |
| CN109009566A (en) * | 2017-08-29 | 2018-12-18 | 东莞东阳光科研发有限公司 | A kind of artificial lens |
| CN111031964A (en) * | 2017-06-15 | 2020-04-17 | 奥康莫公司 | Intraocular lens implant |
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2012
- 2012-01-19 CN CN2012200251720U patent/CN202446299U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103211665A (en) * | 2012-01-19 | 2013-07-24 | 爱博诺德（北京）医疗科技有限公司 | Posterior chamber type artificial crystal |
| WO2013107288A1 (en) * | 2012-01-19 | 2013-07-25 | 爱博诺德（北京）医疗科技有限公司 | Posterior chamber-type intraocular lens |
| CN103211665B (en) * | 2012-01-19 | 2016-01-13 | 爱博诺德（北京）医疗科技有限公司 | Posterior chamber intraocular lens |
| US9855136B2 (en) | 2012-01-19 | 2018-01-02 | Eyebright Medical Technology (Beijing) Co., Ltd. | Posterior chamber intraocular lens |
| CN103919630A (en) * | 2013-01-16 | 2014-07-16 | 九扬贸易有限公司 | Bionic artificial lens |
| CN103919630B (en) * | 2013-01-16 | 2016-12-28 | 九扬贸易有限公司 | Bionical intraocular lens |
| CN111031964A (en) * | 2017-06-15 | 2020-04-17 | 奥康莫公司 | Intraocular lens implant |
| US11992582B2 (en) | 2017-06-15 | 2024-05-28 | Accommo Ag | Intraocular lens implant |
| CN109009566A (en) * | 2017-08-29 | 2018-12-18 | 东莞东阳光科研发有限公司 | A kind of artificial lens |
| CN109009566B (en) * | 2017-08-29 | 2024-04-26 | 东莞东阳光医疗智能器件研发有限公司 | Artificial crystal |
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Address after: 102200 No. 9 Xingchang Road, Changping District Science and Technology Park, Beijing Patentee after: Abbott (Beijing) Medical Technology Co., Ltd. Address before: 102200, Changping District Beijing science and Technology Park, super Road, No. 37, building 1, 6 North Zone Patentee before: Eponode (Beijing) Medical Technology Co., Ltd. |
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