CN203647535U - Astigmatism correction type intraocular lens - Google Patents
Astigmatism correction type intraocular lens Download PDFInfo
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- CN203647535U CN203647535U CN201320758253.6U CN201320758253U CN203647535U CN 203647535 U CN203647535 U CN 203647535U CN 201320758253 U CN201320758253 U CN 201320758253U CN 203647535 U CN203647535 U CN 203647535U
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- intraocular lenses
- artificial intraocular
- astigmatism correction
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- 201000009310 astigmatism Diseases 0.000 title claims abstract description 77
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- 201000009308 regular astigmatism Diseases 0.000 description 3
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Abstract
The utility model relates to an astigmatism correction type intraocular lens. The astigmatism correction type intraocular lens is a Toric intraocular lens, wherein the outer edge of the optical portion is uniform in thickness. The self-adaptation matching turning design is adopted in the outer edge of an effective optical zone of the Toric intraocular lens, so that the thickness of the Toric lens is increased adaptively from different thicknesses of angular positions of the outer edge of the effective optical zone of the Toric lens to the same height, the uniform thickness of the outer edge of the optical portion of the Toric intraocular lens can be guaranteed, the position stability of the Toric intraocular lens in a bag can be improved, long-term astigmatism correction effect of the Toric intraocular lens can be improved, and the design limit of the fastener position is avoided.
Description
Technical field
This utility model relates generally to astigmatism correction type artificial intraocular lenses.Particularly, this utility model relates to the Toric artificial intraocular lenses for astigmatism that the outer edge thickness of a kind of optic equates.
Background technology
Artificial intraocular lenses (IOL) is a kind of artificial lens that can implant ophthalmic.As shown in Figure 1, artificial intraocular lenses 1 form, is normally made up of with the support button loop 5 that is arranged on optic 2 peripheries a circular light department of the Chinese Academy of Sciences 2.Artificial intraocular lenses 1 optic 2 is made up of efficient light school district 3 and optic marginal portion 4.
Ametropia is on the obvious a kind of factor of image quality impact, wherein astigmatism is a kind of common people's ametropia phenomenon, refer to that eyeball refractive power on different warps is inconsistent, or the diopter of same warp is not etc., so that the parallel rays that enters ophthalmic can not form focus on retina, and form the phenomenon of focal line.Astigmatism is divided into two kinds of regular astigmatism and irregular astigmatisms clinically.Two warps of refractive power difference maximum are main radial line, and two main warp lines are mutually vertical, are regular astigmatism; Each meridianal astigmatic flexibility is inconsistent, is irregular astigmatism.Wherein regular astigmatism can be corrected by eyeglass.
In normal population, corneal astigmatism is greater than the 15%-29% that accounts for of 1.5D, and has a strong impact on people's visual quality.The astigmatic up-to-date Therapeutic Method of cataract of companion is the object of correcting corneal astigmatism when an astigmatic type artificial intraocular lenses (Toric IOL) reaches normal dioptric by implanting within the eye at present.
Toric artificial intraocular lenses's development was to be proposed by Japanese Kimiya Shimizu at first, and U.S. FDA was formally examined by being applied to clinical in 1998, after this Toric artificial intraocular lenses of oneself that all released one after another of each large artificial crystal production manufacturer.These Toric artificial intraocular lensess have single type, also have three-member type; Have soft, rigid; It is hydrophilic, hydrophobic that material has; Combine aspheric surface, multifocal, also can adopt modified model " L " button loop or " C " button loop simultaneously, improve the stability of Toric artificial intraocular lenses in human eye.No matter which kind of design, the technological core of realizing the Toric artificial intraocular lenses of astigmatism correction is that the toroid in optical surface shape (toroidal) is applied to artificial intraocular lenses, extra-column mirror degree on the original dioptric basis of artificial intraocular lenses, utilize toroid inconsistent feature of diopter on each warp direction, correct the astigmatism of cataract patient cornea.
The definition of Toric face shape (toroid) is known for those skilled in the art, that is: the curve l(bus in Y-Z plane) rotate a circle and form (referring to Zemax Optical Design Program Users Guide page 272, Toroidal part) perpendicular to the straight line l ' (rotating shaft) of Z axis around Y-axis.Curve l can be round, can be also aspheric curve, and l ' is rotating shaft radius to the distance in the bus center of circle, as shown in Figure 2 (graphic extension of toric acquisition principle).
No matter bus is spherical curve is still aspheric curve, by the derivation of equation, (respective formula can be at optical tooling book, as Daniel Malacara, Handbook of optical design, chapter 2, formula A2.2 and formula A2.5(are shown in appendix)) and Theoretical Calculation can know: for toric artificial intraocular lenses, determined primary mirror and the radius of curvature of post mirror direction and artificial intraocular lenses's center thickness (or edge thickness of primary mirror direction), the thickness at the each point place of intraocular lens optic portion outer rim is all determined.
Fig. 3 shows the radius of curvature of Toric artificial intraocular lenses under different angles and the situation of change of thickness.For toric artificial intraocular lenses, on Radius in office (as Fig. 3 radius r), eyeglass is in each radius of curvature difference in the radial direction, thickness difference, as shown in Figure 3, primary mirror directional curvature radius maximum (R
0), the thickest (d simultaneously
0), post mirror directional curvature radius minimum (R
90), the thinnest (d simultaneously
90), the radius of curvature of all the other directions and thickness is between the two, transition change gradually.Correspondingly, the thickness of Toric intraocular lens optic portion outer rim also meets this rule, i.e. became uneven, and the thickest with primary mirror direction, post mirror direction is the thinnest, and in all the other directions, thickness is between the two.Again for example, it is 1.48 that Fig. 4 shows refractive index, diopter 20D, and post mirror degree 1.5D, the thickness d (unit is millimeter) of the toric intraocular lens optic portion outer rim of the thick 0.3mm of primary mirror direction is with the change curve of circumferential position angle A (unit is degree).Derive and just can find and as shown in Figure 4 by simple Theoretical Calculation: the thickness distribution of toric intraocular lens optic portion outer rim meets sin/cos curve distribution rule along circumferential thickness.
But the phenomenon along circumferential became uneven of this optic outer rim brings following problem can to toric artificial intraocular lenses:
(1) make Toric artificial intraocular lenses all directions unbalance stress in human eye pouch, cause Toric artificial intraocular lenses to rotate off normal, affect astigmatism correction effect.
Artificial intraocular lenses puts into after human eye pouch 9, and pouch supports button loop 5 to artificial intraocular lenses and exerts pressure, and artificial intraocular lenses is corresponding can produce counteracting force, maintains the position stability of artificial intraocular lenses in pouch.The force analysis of Toric artificial intraocular lenses in pouch is shown in Fig. 5.Pouch 9 supports button loop by compression, and intraocular lens optic portion 2 is applied to compression stress F, and this power can be decomposed into the component in all directions, such as the power F being decomposed in the thinnest direction of Toric artificial intraocular lenses
tpower F in the thickest direction
i, (F as shown in Figure 5
1t, F
2t; And F
1i, F
2i); Toric artificial crystal material produces retroaction tension force f to the compression stress of pouch
iwith f
t, (f as shown in Figure 5
1t, f
2t; And f
1i, f
2i), due to Toric artificial intraocular lenses marginal portion became uneven, cause the support force f of thin direction
tdiminish, pouch applied pressure can not be offset completely in two thin directions, the f with joint efforts that Toric artificial intraocular lenses produces in all directions is all not identical in size and direction with the compression stress F of pouch, these two revolving forces that do not have the power of offsetting to form Toric artificial intraocular lenses circumferencial direction, cause Toric artificial intraocular lenses rotation.
Astigmatism correction type artificial intraocular lenses has strict requirement to crystal astigmatism axle and corneal astigmatism shaft alignement, clinical practice shows, implant Toric artificial intraocular lenses, 1 ° of the every rotation of Toric artificial intraocular lenses, can cause 3.3% lens cylinder mirror degree loss, Toric artificial intraocular lenses rotates 30 ° of > or more, can cause the complete failure of astigmatism correction, and therefore the rotation of Toric artificial intraocular lenses's this circumferencial direction can produce and have a strong impact on astigmatism correction.And the Toric artificial intraocular lenses that the pouch active force inequality that this optic outer rim became uneven causes causes rotation is accumulated over a long period, can not stop along with the increase of Toric artificial intraocular lenses Implantation Time accumulation and increase the weight of.
(2) be subject to the fastening with a rope, string, etc. restriction of support force, artificial intraocular lenses's button loop need to guarantee certain thickness.But, Toric artificial intraocular lenses forms restriction to the Position Design of button loop, the phenomenon of brim-portion thickness inequality must design button loop in the thickest direction of Toric intraocular lens optic portion's outer rim Toric artificial intraocular lenses, to guarantee enough thickness and enough support forces, limit thus doctor and patient's selection.
Utility model content
This utility model proposes in view of the above problems, its object is to provide a kind of optic the outer equal Toric artificial intraocular lenses of edge thickness, to improving the positional stability of Toric artificial intraocular lenses in pouch, and then improve toric artificial intraocular lenses's long-term astigmatism correction effect, and remove the restriction of button loop Position Design.
Term definition
The term " optic " using in this application refers to the rounded optical lens (as shown in the Reference numeral 2 in Fig. 1, Fig. 6) of the section 8-8 ' of longitudinal center being made up of artificial intraocular lenses's efficient light school district and optic marginal portion around thereof.
The term " efficient light school district " thereby refer to using is in this application positioned at the part that has optical characteristics and can realize the major function that regulates artificial intraocular lenses's diopter and/or astigmatism at intraocular lens optic portion center.Particularly, the diameter of the toric artificial intraocular lenses's who uses in this utility model embodiment optic is approximately 6 millimeters (maximum can reach 6.5 millimeters), wherein efficient light school district refer to the optic marginal portion that is positioned at toric artificial intraocular lenses with circular portion, its diameter is more than or equal to 4.25 millimeters.
The term " optic marginal portion " using in this application refers to the annular marginal area of the optical characteristics that can not affect artificial intraocular lenses that is arranged on periphery, intraocular lens optic portion efficient light school district.
The term " efficient light school district outer rim " using in this application refers to for the rounded artificial intraocular lenses of the section 8-8 ' of longitudinal center of optic, in the intraocular lens optic portion that radius limits, wait radius circumferential position take the vertical section of circular efficient light school district perimeter edge to the distance between the vertical section O'-O'' of the optical center O through optic, referring to Figure of description Fig. 6.
The term " optic outer rim " using in this application refers to for the rounded artificial intraocular lenses of longitudinal center's section of optic, waits radius circumferential position take the vertical section of circular light department of the Chinese Academy of Sciences perimeter edge to the distance between the vertical section O'-O'' of the optical center O through optic in the intraocular lens optic portion that radius limits.
The term " anterior optic surface " using in this application refers to tailing edge axis oculi direction that optic surface nearer apart from eye cornea in artificial intraocular lenses is implanted to human eye.
The term " optic rear surface " using in this application refers to that optic surface relative with above-mentioned anterior optic surface in artificial intraocular lenses.
The term " button loop " using in this application refers to intraocular lens optic portion and is connected, has not only played the effect of support of optical portion but also plays the contractility that the contraction of ciliary muscle and varicose are produced the part that is delivered to the effect of described optic.
Use in this application the term for example " protruding " that represents shape, " recessed " is for the longitudinal median plane 8-8 ' of intraocular lens optic portion.
For the Toric artificial intraocular lenses in the application, the term " anterior optic surface summit " using in the application refers to the central point in described artificial intraocular lenses's anterior optic surface.Also can say, anterior optic surface summit refers to: the point (referring to the Reference numeral O' in Fig. 7) farthest of the distance in described artificial intraocular lenses's anterior optic surface and between the longitudinal median plane of this intraocular lens optic part; The term " summit, optic rear surface " using in the application refers to the central point on described artificial intraocular lenses's optic rear surface.Also can say, summit, optic rear surface refers to: the point (referring to the Reference numeral O'' in Fig. 7) farthest of the distance on described artificial intraocular lenses's optic rear surface and between the longitudinal median plane of this intraocular lens optic part.
The term " efficient light school district bus " using in the application refers to according to above described toric definition campaign and produces the curve on surface, efficient light school district.
The term " flange curve " using in the application refers in optic marginal portion and corresponding with specific efficient light school district bus to extend to the curve of optic outer rim from effective optical zone outer rim.
The term " design of Adaptive matching flange " using in the application refers to the design that the bus flange curve smoothing corresponding with it in efficient light school district is connected, the design coinciding at the tangent line of efficient light school district, junction point place bus and its corresponding flange curve.
Particularly, this utility model relates to the content of following many aspects:
1. an astigmatism correction type artificial intraocular lenses, described astigmatism correction type artificial intraocular lenses comprises:
The optic being formed by efficient light school district and optic marginal portion;
The button loop being connected with described optic at optic outer rim place,
The diameter of wherein said efficient light school district is more than or equal to 4.25 millimeters and the design of described efficient light school district employing toroid;
It is characterized in that,
The thickness of described astigmatism correction type artificial intraocular lenses's optic outer rim equates and the thickness of described optic outer rim is 0.25mm-0.45mm.
2. according to the astigmatism correction type artificial intraocular lenses described in aspect 1, it is characterized in that the rounded shape of described optic.
3. according to the astigmatism correction type artificial intraocular lenses described in aspect 1 or 2, it is characterized in that, the thickness of described optic outer rim is 0.25mm-0.38mm.
4. according to the astigmatism correction type artificial intraocular lenses described in any one in aforementioned aspect 1-3, it is characterized in that, the diameter of described efficient light school district is more than or equal to 5.00 millimeters.
5. according to the astigmatism correction type artificial intraocular lenses described in any one in aforementioned aspect 1-4, it is characterized in that, described astigmatism correction type artificial intraocular lenses's anterior optic surface and the face shape of rear surface comprise one or more in the face shape of multifocal of sphere, aspheric surface, toroid, multi-region refractive design multifocal and multi-region diffractive designs, and at least one surface in described astigmatism correction type artificial intraocular lenses's anterior optic surface and rear surface comprises toroid design.
6. according to the astigmatism correction type artificial intraocular lenses described in any one in aforementioned aspect 1-5, it is characterized in that, part is designed for flange in described optic marginal portion.
7. according to the astigmatism correction type artificial intraocular lenses described in any one in aforementioned aspect 1-6, it is characterized in that, the flange curve that described astigmatism correction type artificial intraocular lenses's the efficient light school district bus described flange corresponding with it designs in part is connected.
8. according to the astigmatism correction type artificial intraocular lenses described in any one in aforementioned aspect 1-7, it is characterized in that, the flange curve smoothing that described astigmatism correction type artificial intraocular lenses's the efficient light school district bus described flange corresponding with it designs in part is connected.
9. according to aforementioned aspect 1-6, the astigmatism correction type artificial intraocular lenses in 8 described in any one, is characterized in that, described flange curve is the circular arc with same curvature radius.
10. according to the astigmatism correction type artificial intraocular lenses described in aspect 9, it is characterized in that, the range of curvature radius of described flange curve is 0mm-2.4mm.
11. according to aforementioned aspect 1-6, and the astigmatism correction type artificial intraocular lenses in 8 described in any one is characterized in that, described flange curve is the circular arc with different curvature radius.
12. according to the astigmatism correction type artificial intraocular lenses described in any one in aforementioned aspect 1-11, it is characterized in that, described astigmatism correction type artificial intraocular lenses is single type artificial intraocular lenses or three-member type artificial intraocular lenses.
This utility model has following beneficial effect especially:
The utility model proposes a kind of Toric artificial intraocular lenses of optic outer rim uniform thickness, adopt the design of Adaptive matching flange at outer rim place, Toric artificial intraocular lenses efficient light school district, Toric crystal is thickened to sustained height by the outside self adaptation of different-thickness of outer rim all angles position, efficient light school district, thereby guarantee toric intraocular lens optic portion outer rim uniform thickness, improve the positional stability of toric artificial intraocular lenses in pouch, and then improve toric artificial intraocular lenses's long-term astigmatism correction effect, and remove the restriction of button loop Position Design.
Accompanying drawing explanation
According to following accompanying drawing and explanation, feature of the present utility model, advantage will become more clear, wherein:
Fig. 1 is the Toric artificial intraocular lenses's that observes from prior art Toric artificial intraocular lenses front surface perspective schematic view, and wherein button loop launches and is not folded on the surface of Toric intraocular lens optic portion;
Fig. 2 schematically shows the toric acquisition principle of Toric artificial intraocular lenses;
Fig. 3 schematically shows the situation of change of edge thickness outside the radius of curvature of prior art Toric artificial intraocular lenses under different angles and optic;
It is 1.48 that Fig. 4 schematically shows refractive index, diopter 20D, and post mirror degree 1.5D, outside the prior art Toric intraocular lens optic portion of the thick 0.3mm of primary mirror direction, edge thickness is with the change curve of circumferential position angle;
Fig. 5 schematically shows after being implanted in human eye, the stressing conditions of Toric artificial intraocular lenses in human eye pouch;
Fig. 6 be observe from Toric artificial intraocular lenses front surface of the present utility model according to the single type Toric artificial intraocular lenses's of an embodiment of the present utility model perspective schematic view;
Fig. 7 is the generalized section that intercepts the Toric intraocular lens optic portion obtaining along line A-A' shown in Fig. 6, for the sake of clarity, and this not shown button loop being connected with Toric intraocular lens optic portion outer rim;
Fig. 8 schematically shows the Adaptive matching (circular arc flange) between its outer rim place, efficient light school district and flange curve according to the Toric artificial intraocular lenses of an embodiment of the present utility model;
Fig. 9 schematically shows the Adaptive matching between its outer rim place, efficient light school district and flange curve (same curvature radius arc flange) according to the Toric artificial intraocular lenses of an embodiment of the present utility model, and this there is shown the Adaptive matching connection of efficient light school district bus in A-A' section (solid line) and B-B' section (dotted line) and its corresponding flange curve;
Figure 10 schematically shows the Adaptive matching between its outer rim place, efficient light school district and flange curve (different curvature radius circular arc flange) according to the Toric artificial intraocular lenses of another embodiment of the present utility model, and this there is shown the Adaptive matching connection of efficient light school district bus in A-A' section (solid line) and B-B' section (dotted line) and its corresponding flange curve;
Figure 11 schematically shows the transition flange (the curve flange design that comprise straight line) of the Toric artificial intraocular lenses who obtains according to the line A-A' intercepting along shown in Fig. 6 of another embodiment of the present utility model between its outer rim place, efficient light school district and flange curve; With
Figure 12 schematically shows the transition flange (the curve flange design of arbitrary shape) of the Toric artificial intraocular lenses who obtains according to the line A-A' intercepting along shown in Fig. 6 of another embodiment of the present utility model between its outer rim place, efficient light school district and flange curve.
In the application's accompanying drawing, use identical drawing reference numeral to represent same or analogous element.
Drawing reference numeral explanation
1 Toric artificial intraocular lenses
2 optic
3 efficient light school districts
4 optic marginal portions
5 buttons loop
6 anterior optic surface
7 optic rear surfaces
The longitudinal median plane of 8-8 ' intraocular lens optic portion
9 pouches
F-pouch acts on the compression stress on artificial intraocular lenses
F
i-pouch is the component in the thickest direction to artificial intraocular lenses's compression stress
F
t-pouch is the component in the thinnest direction to artificial intraocular lenses's compression stress
F
ithe retroaction tension force of-artificial intraocular lenses in the thickest direction
F
tthe retroaction tension force of-artificial intraocular lenses in the thinnest direction
Making a concerted effort of f-artificial intraocular lenses counteracting force
10 efficient light school district outer rims
11 optic outer rims
12 efficient light school district buses
13 flange curves
O optic (front or rear) surface vertices
The radius of curvature of R flange curve
A-A ' is along the hatching of Toric artificial intraocular lenses primary mirror direction
For example, hatching in B-B ' arbitrarily angled (being θ angle with respect to primary mirror direction) direction.
The specific embodiment
Following specific embodiment is just 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 spirit of the present utility model and scope, all will fall in the covering scope of this utility model patent.
Toric artificial intraocular lenses of the present utility model by refractive index the hydrophobic acrylic acid's ester material 1.45 to 1.56 make.Certainly, those skilled in the art also can recognize, toric artificial intraocular lenses of the present utility model also can be made up of other conventional materials such as silica gel, hydrogel or polymethyl methacrylates.
The front surface of toric intraocular lens optic portion in this utility model embodiment and the face shape of rear surface can comprise one or more in the face shape of multifocal of sphere, aspheric surface, toroid, multi-region refractive design multifocal and multi-region diffractive designs, and at least one surface in front surface and the rear surface of toric intraocular lens optic portion in this utility model embodiment comprises toroid design.
Toric artificial intraocular lenses of the present utility model can be single type artificial intraocular lenses, can be also three-member type artificial intraocular lenses.According to an embodiment of the present utility model, the toric artificial intraocular lenses's of the present utility model rounded shape of optic.Part is designed for flange in toric artificial intraocular lenses's of the present utility model optic marginal portion, and the object of this design is to make Toric crystal to be thickened to sustained height by the outside self adaptation of different-thickness of outer rim all angles position, efficient light school district.
In addition, the center thickness of toric artificial intraocular lenses's of the present utility model optic in the scope of 0.3 millimeter-1.2 millimeters and the thickness of optic outer rim in the scope of 0.25 millimeter-0.45 millimeter." center thickness of optic " refers to the thickness between the corresponding optic front and rear surfaces in position, the center of circle (optical center) of longitudinal center of toric intraocular lens optic of the present utility model portion section.Known for those skilled in the art: the size of the thickness of the size of the center thickness of toric artificial intraocular lenses's of the present utility model optic and toric artificial intraocular lenses's of the present utility model optic outer rim depends primarily on selected material and the diopter reaching.
Toric artificial intraocular lenses in this utility model embodiment all can reach the diopter that uses clinically maximum 15.0D-26.0D at present.
(I) astigmatism correction type artificial intraocular lenses
Fig. 6 is according to the single type Toric artificial intraocular lenses's of an embodiment of the present utility model perspective schematic view.Fig. 7 is the generalized section that intercepts the Toric intraocular lens optic portion obtaining along line A-A' shown in Fig. 6, for the sake of clarity, and this not shown button loop being connected with Toric intraocular lens optic portion outer rim 11.As seen from Figure 6, A-A ' direction is the hatching along Toric artificial intraocular lenses primary mirror direction.
The optic 2 of astigmatism correction type artificial intraocular lenses shown in Fig. 6 and Fig. 7 is made up of efficient light school district 3 and optic marginal portion 4.The diameter of described efficient light school district 3 is more than or equal to 4.25 millimeters, and preferably, the diameter of described efficient light school district is more than or equal to 5.00 millimeters.Efficient light school district 3 in the front surface 6 of described astigmatism correction type artificial intraocular lenses's optic 2 adopts toroid design.The thickness of described astigmatism correction type artificial intraocular lenses's optic outer rim 11 equates and the thickness h of described optic outer rim 11 is 0.25mm-0.45mm.Preferably, the thickness h of described optic outer rim 11 is 0.25mm-0.38mm.
Those skilled in the art can recognize: described astigmatism correction type artificial intraocular lenses's anterior optic surface 6 and the face shape of rear surface 7 can comprise one or more in the face shape of multifocal of sphere, aspheric surface, toroid, multi-region refractive design multifocal and multi-region diffractive designs, and at least one surface in described astigmatism correction type artificial intraocular lenses's anterior optic surface 6 and rear surface 7 comprises toroid design.
As shown in Figure 7, described astigmatism correction type artificial intraocular lenses's the efficient light school district bus 12 flange curve 13 corresponding with it is connected.As shown in Figure 7, the thickness of efficient light school district outer rim 10 is d.Preferably, efficient light school district bus 12 and its corresponding flange curve 13 smooth connections of described astigmatism correction type artificial intraocular lenses, at junction point 10 places, the tangent line of the tangent line of efficient light school district bus 12 and its corresponding flange curve 13 coincides.
As shown in Figure 7, in this embodiment, described flange curve 13 is for having the circular arc of single radius of curvature R.
Fig. 8 schematically shows according to the Toric artificial intraocular lenses of an embodiment of the present utility model and starts to adopt single radius of curvature circular arc flange from its efficient light school district outer rim in optic marginal portion; Fig. 9 schematically shows the Adaptive matching between its outer rim place, efficient light school district and flange curve (same curvature radius arc flange) according to the Toric artificial intraocular lenses of an embodiment of the present utility model, and this there is shown the Adaptive matching connection of efficient light school district bus in A-A' section (solid line) and B-B' section (dotted line) and its corresponding flange curve; Figure 10 schematically shows the Adaptive matching between its outer rim place, efficient light school district and flange curve (different curvature radius circular arc flange) according to the Toric artificial intraocular lenses of another embodiment of the present utility model, and this there is shown the Adaptive matching connection of efficient light school district bus in A-A' section (solid line) and B-B' section (dotted line) and its corresponding flange curve; Figure 11 schematically shows the transition flange between its outer rim place, efficient light school district and flange curve (the curve flange that comprises straight line) according to the Toric artificial intraocular lenses of another embodiment of the present utility model; Figure 12 schematically shows the transition flange between its outer rim place, efficient light school district and flange curve (the curve flange of arbitrary shape) according to the Toric artificial intraocular lenses of another embodiment of the present utility model.
From Fig. 9-12, described flange curve 13 can be also to have the circular arc of different curvature radius or the curve of other any shapes (comprising straight line).As shown in Figure 9, at outer rim 10 places, efficient light school district, (identical circular diameter (D)) is with the circular arc outward flanging of different curvature radius (R0.5, R1), until reach same optic outer rim 11 thickness h.Another kind of optional mode is that as shown in figure 10, the circular arc outward flanging at different circular diameter places (D1, D2) with same curvature radius (R0.5), until reach same optic outer rim 11 thickness h.
(II) Adaptive matching flange method for designing and the production method of astigmatism correction type intraocular lens optic portion 2
Preferably, this utility model also relates to the astigmatism correction type artificial intraocular lenses's 1 that optic outer rim 11 thickness described in a kind of design are above equal method, said method comprising the steps of:
Set diameter and the thickness h of described optic outer rim 11;
Set the link position of described efficient light school district bus 12 and its corresponding flange curve 13; And
Set the radius of curvature of described flange curve 13, thereby the tangent line of described efficient light school district bus 12 tangent lines at described link position place flange curve 13 is corresponding thereto coincided.
This method for designing can be achieved by means of computer equipment.
Preferably, described link position is positioned at outer rim 10 places, efficient light school district and described flange curve 13 has different radius of curvature, as shown in figure 10.Another kind of optional mode is, according to the feature of described efficient light school district bus 12, described link position is arranged on the circumference of optic different-diameter and described flange curve 13 has identical radius of curvature, as shown in Figure 9.
This utility model also relates to a kind of previous designs method, method of the astigmatism correction type artificial intraocular lenses 1 that production optic outer rim 11 thickness are equal of adopting.This production method can be achieved by means of numerical control machine process equipment.
This utility model has following beneficial effect especially:
The utility model proposes a kind of Toric artificial intraocular lenses of optic outer rim uniform thickness, adopt the design of Adaptive matching flange at outer rim place, Toric artificial intraocular lenses efficient light school district, Toric crystal is thickened to sustained height by the outside self adaptation of different-thickness of outer rim all angles position, efficient light school district, thereby guarantee toric intraocular lens optic portion outer rim uniform thickness, improve the positional stability of toric artificial intraocular lenses in pouch, and then improve toric artificial intraocular lenses's long-term astigmatism correction effect, and remove the restriction of button loop Position Design.
Embodiment
Below adopt embodiment in further detail the Adaptive matching flange design (same curvature radius arc flange) adopting in this utility model to be described, but those skilled in the art can recognize: this utility model is not limited to these embodiment below.
Outer edge thickness: the 0.25-0.45mm of optic
(1) diopter 15-26D, refractive index 1.45-1.56, astigmatic post mirror degree≤4.5D, flange original position diameter >=4.25mm, flange curve curvature radius R:0-3.5mm.
(2) diopter 15-26D, refractive index 1.45-1.56, astigmatic post mirror degree≤4.5D, flange original position diameter >=5.0mm, flange curve curvature radius R:0-1.5mm.
Outer edge thickness: the 0.25-0.38mm of optic
(1) diopter 15-26D, refractive index 1.45-1.56, astigmatic post mirror degree≤4.5D, flange original position diameter >=4.25mm, flange curve curvature radius R:0-2.4mm.
(2) diopter 15-26D, refractive index 1.45-1.56, astigmatic post mirror degree≤4.5D, flange original position diameter >=5.0mm, flange curve curvature radius R:0-1.0mm.
Table 1: outer edge thickness: the 0.25-0.45mm of optic, diopter 15-26D, refractive index 1.45-1.56, astigmatic post mirror degree≤4.5D, optical area diameter reaches the flange circular arc maximum curvature radius R that 4.25mm or 5.0mm can use when above
Embodiment is above only illustrative rather than restrictive.Therefore,, in the situation that not departing from utility model design disclosed herein, those skilled in the art can modify or change above-described embodiment.Therefore, protection domain of the present utility model is only limited by the scope of appended claims.
Claims (12)
1. an astigmatism correction type artificial intraocular lenses, described astigmatism correction type artificial intraocular lenses comprises:
The optic being formed by efficient light school district and optic marginal portion;
The button loop being connected with described optic at optic outer rim place,
The diameter of wherein said efficient light school district is more than or equal to 4.25 millimeters and the design of described efficient light school district employing toroid;
It is characterized in that,
The thickness of described astigmatism correction type artificial intraocular lenses's optic outer rim equates and the thickness of described optic outer rim is 0.25mm-0.45mm.
2. astigmatism correction type artificial intraocular lenses according to claim 1, is characterized in that, the rounded shape of described optic.
3. astigmatism correction type artificial intraocular lenses according to claim 1, is characterized in that, the thickness of described optic outer rim is 0.25mm-0.38mm.
4. astigmatism correction type artificial intraocular lenses according to claim 1, is characterized in that, the diameter of described efficient light school district is more than or equal to 5.00 millimeters.
5. astigmatism correction type artificial intraocular lenses according to claim 1, it is characterized in that, described astigmatism correction type artificial intraocular lenses's anterior optic surface and the face shape of rear surface comprise one or more in the face shape of multifocal of sphere, aspheric surface, toroid, multi-region refractive design multifocal and multi-region diffractive designs, and at least one surface in described astigmatism correction type artificial intraocular lenses's anterior optic surface and rear surface comprises toroid design.
6. astigmatism correction type artificial intraocular lenses according to claim 1, is characterized in that, part is designed for flange in described optic marginal portion.
7. astigmatism correction type artificial intraocular lenses according to claim 1, is characterized in that, the flange curve that described astigmatism correction type artificial intraocular lenses's the efficient light school district bus described flange corresponding with it designs in part is connected.
8. astigmatism correction type artificial intraocular lenses according to claim 1, is characterized in that, the flange curve smoothing that described astigmatism correction type artificial intraocular lenses's the efficient light school district bus described flange corresponding with it designs in part is connected.
9. astigmatism correction type artificial intraocular lenses according to claim 8, is characterized in that, described flange curve is the circular arc with same curvature radius.
10. astigmatism correction type artificial intraocular lenses according to claim 9, is characterized in that, the range of curvature radius of described flange curve is 0mm-2.4mm.
11. astigmatism correction type artificial intraocular lensess according to claim 8, is characterized in that, described flange curve is the circular arc with different curvature radius.
12. according to the astigmatism correction type artificial intraocular lenses described in any one in aforementioned claim 1-11, it is characterized in that, described astigmatism correction type artificial intraocular lenses is single type artificial intraocular lenses or three-member type artificial intraocular lenses.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320758253.6U CN203647535U (en) | 2013-11-27 | 2013-11-27 | Astigmatism correction type intraocular lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320758253.6U CN203647535U (en) | 2013-11-27 | 2013-11-27 | Astigmatism correction type intraocular lens |
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| CN203647535U true CN203647535U (en) | 2014-06-18 |
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| CN201320758253.6U Expired - Lifetime CN203647535U (en) | 2013-11-27 | 2013-11-27 | Astigmatism correction type intraocular lens |
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| CN104127262A (en) * | 2013-11-27 | 2014-11-05 | 爱博诺德（北京）医疗科技有限公司 | Astigmatism-correcting intraocular lens and design and production methods thereof |
| US10687935B2 (en) | 2015-10-05 | 2020-06-23 | Acufocus, Inc. | Methods of molding intraocular lenses |
| US10765508B2 (en) | 2011-12-02 | 2020-09-08 | AcFocus, Inc. | Ocular mask having selective spectral transmission |
| US10869752B2 (en) | 2003-05-28 | 2020-12-22 | Acufocus, Inc. | Mask for increasing depth of focus |
| US11311371B2 (en) | 2009-08-13 | 2022-04-26 | Acufocus, Inc. | Intraocular lens with elastic mask |
| US11357617B2 (en) | 2009-08-13 | 2022-06-14 | Acufocus, Inc. | Method of implanting and forming masked intraocular implants and lenses |
| US11364110B2 (en) | 2018-05-09 | 2022-06-21 | Acufocus, Inc. | Intraocular implant with removable optic |
| US11464625B2 (en) | 2015-11-24 | 2022-10-11 | Acufocus, Inc. | Toric small aperture intraocular lens with extended depth of focus |
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- 2013-11-27 CN CN201320758253.6U patent/CN203647535U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10869752B2 (en) | 2003-05-28 | 2020-12-22 | Acufocus, Inc. | Mask for increasing depth of focus |
| US11311371B2 (en) | 2009-08-13 | 2022-04-26 | Acufocus, Inc. | Intraocular lens with elastic mask |
| US11357617B2 (en) | 2009-08-13 | 2022-06-14 | Acufocus, Inc. | Method of implanting and forming masked intraocular implants and lenses |
| US10765508B2 (en) | 2011-12-02 | 2020-09-08 | AcFocus, Inc. | Ocular mask having selective spectral transmission |
| CN104127262A (en) * | 2013-11-27 | 2014-11-05 | 爱博诺德（北京）医疗科技有限公司 | Astigmatism-correcting intraocular lens and design and production methods thereof |
| WO2015078271A1 (en) * | 2013-11-27 | 2015-06-04 | 爱博诺德（北京）医疗科技有限公司 | Astigmatism-correcting intraocular lens and design and production methods therefor |
| CN104127262B (en) * | 2013-11-27 | 2016-07-27 | 爱博诺德（北京）医疗科技有限公司 | Astigmatism correction type artificial intraocular lenses and design thereof and production method |
| US10687935B2 (en) | 2015-10-05 | 2020-06-23 | Acufocus, Inc. | Methods of molding intraocular lenses |
| US11690707B2 (en) | 2015-10-05 | 2023-07-04 | Acufocus, Inc. | Methods of molding intraocular lenses |
| US11464625B2 (en) | 2015-11-24 | 2022-10-11 | Acufocus, Inc. | Toric small aperture intraocular lens with extended depth of focus |
| US11364110B2 (en) | 2018-05-09 | 2022-06-21 | Acufocus, Inc. | Intraocular implant with removable optic |
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