CN208693535U - Double aspherical non-rotational symmetries reflect multifocal intraocular lenses - Google Patents
Double aspherical non-rotational symmetries reflect multifocal intraocular lenses Download PDFInfo
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- CN208693535U CN208693535U CN201721236636.1U CN201721236636U CN208693535U CN 208693535 U CN208693535 U CN 208693535U CN 201721236636 U CN201721236636 U CN 201721236636U CN 208693535 U CN208693535 U CN 208693535U
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- vision zone
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- intraocular lenses
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Abstract
The utility model discloses a kind of double aspherical non-rotational symmetry refraction multifocal intraocular lenses, it includes optical section, ring shaped contact portion and two support loops, the front surface and rear surface of the optical section in etc. convex and aspherical convex outward setting, the convex outward includes distance vision zone, near vision zone and transitional region, the ring shaped contact portion is convexly equipped in the rear surface of the optical section, it is contacted with the rear capsule of eyeball, the ring shaped contact portion is equipped with notch.In double aspherical non-rotational symmetry refraction multifocal intraocular lenses provided by the utility model, the length of the transitional region is shorter, make vision apparent to which light loss is smaller, and the interference between the distance vision zone and the near vision zone is smaller, to effectively improve halo glare phenomenon, also, it is contacted by the ring shaped contact portion with rear capsule, remaining proliferation of lens epithelial cells after cataract operation is stopped to move between artificial lens and rear capsule.
Description
Technical field
The utility model relates to the field of medical instrument technology, more particularly to a kind of double aspherical non-rotational symmetry refractions are multifocal
Point intraocular lens.
Background technique
Artificial lens is a kind of artificial lens that energy implantation is intraocular, for replacing the people for becoming muddy because of cataract conditions
Mineral crystal in eye.The form of artificial lens is usually made of the support loop of a circular optical component and periphery.Optics
Component is made of transparent high molecular material.These high molecular materials can be hard, be also possible to soft.By hard material
Manufactured artificial lens, it is necessary to could be implanted into intraocularly by a biggish notch (typically larger than 6 millimeters), now gradually by
It eliminates.The artificial lens made of soft material is also frequently referred to as foldable artificial lens, can pass through after folding or curling
One lesser notch (from less than 2 millimeters to 3 millimeters) implantation is intraocular.Currently used for preparing the soft material of foldable artificial lens
Material is broadly divided into several classes such as silica gel, hydrophilic acrylate's (hydrogel) and hydrophobic acrylic acid's ester.
Artificial lens is divided into single focus intraocular lens and Multifocal intraocular lens, wherein Multifocal intraocular lens are with bifocal
For point artificial lens, including refractive and diffraction type Bifocal intraocular's crystal, wherein refractive Bifocal intraocular's crystal design
Method is as follows: for refractive Bifocal intraocular's crystal, first design one depending on double spherical surface artificial lens far, then by it
One surface is radially divided into several annulus, and diopter 3.5D is added on depending on annulus closely, is then not required to depending on annulus far
Add diopter.
Existing refractive Bifocal intraocular crystal because being in inside and outside design between annulus, and makes between each annulus
Transitional region is too long, so that the light that transitional region is lost is larger, on the other hand makes between each annulus
Interference it is larger, and will appear misted and halo glare phenomenon occur.
Utility model content
The main purpose of the utility model is to provide a kind of double aspherical non-rotational symmetries to reflect multifocal intraocular implants
Body, this pair of aspherical non-rotational symmetry, which reflects the optical clarity of multifocal intraocular lenses and can effectively improve halo dazzle, to be showed
As.
To reach above-mentioned technical purpose, the utility model provides a kind of double aspherical non-rotational symmetry refraction multifocal people
Work crystalline lens, comprising:
Optical section, the front surface and rear surface of the optical section in etc. convex and aspherical convex outward setting, it is described outer
Convex surface include the farther away distance vision zone of focal length, the closer near vision zone of focal length and be located at the distance vision zone and near vision zone
Transitional region between domain, the distance vision zone and near vision zone are along the circumferentially distributed of the optical section；
Ring shaped contact portion is convexly equipped in the rear surface of the optical section, and the periphery along the optical section extends, and the annular
Contact portion protrusion height is greater than the evagination size of the rear surface, and the ring shaped contact portion is to be implanted into eye in the artificial lens
It after ball, is contacted with the rear capsule of eyeball, the ring shaped contact portion is equipped with notch；And
Two support loops, are symmetrically set in the outer peripheral surface of the optical section.
Preferably, multiple notches are evenly distributed with along the periphery of the optical section, the ring shaped contact portion.
Preferably, the width of the notch is 0.6 to 0.8mm.
Preferably, the rear end face in the ring shaped contact portion is arranged in arc surface.
Preferably, the protrusion height of the rear surface is h, and h is 0.3 to 0.4mm.
Preferably, the ring shaped contact portion protrusion height H, H-h > 0.4mm.
Preferably, the diopter difference of the distance vision zone and near vision zone is+3D.
Preferably, the distance vision zone and the near vision zone extend outwardly from the center of the optical section；
The width of the transitional region is in be gradually increased setting from the center of the optical section outward.
Preferably, the distance vision zone, near vision zone and the transitional region, area specific gravity correspond to 52%, 41%
With 7%.
Preferably, the thickness of the junction of the optical section and each support loop, to the thickness that should be greater than supporting loop accordingly
Degree.
In technical solution provided by the utility model, the distance vision zone and near vision zone along the optical section circumferential direction
Distribution, compared with the existing technology in inner and outer ring setting the case where, double aspherical non-rotational symmetries provided by the utility model
It reflecting in multifocal intraocular lenses, the length of transitional region is shorter between the distance vision zone and the near vision zone, from
And light loss is smaller and makes vision apparent, and the interference between the distance vision zone and the near vision zone is smaller, from
And halo glare phenomenon is effectively improved, also, the ring extended along the periphery of the optical section is convexly equipped in the rear surface
Shape contact portion is contacted by the ring shaped contact portion with the inner surface of capsule after eyeball, to stop remaining crystalline substance after cataract operation
Body epithelial cell proliferation moves between the optical section of artificial lens and rear capsule, while being provided in the ring shaped contact portion scarce
Mouthful, by the setting of the notch, reduce the generation that artificial lens folds the problems in stress collection in installation process.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the embodiment that double aspherical non-rotational symmetries provided by the utility model reflect multifocal intraocular lenses
A visual angle schematic perspective view；
Fig. 2 is the structural schematic diagram of the rear surface of the optical section in Fig. 1；
Fig. 3 is the schematic diagram of the section structure of the optical section in Fig. 1；
Fig. 4 is enlarged diagram uniformly distributed at the A in Fig. 3.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Double aspherical non-rotational symmetries reflect multifocal intraocular lenses | 1b | Near vision zone |
| 1 | Optical section | 1c | Transitional region |
| 11 | Front surface | 2 | Support loop |
| 12 | Rear surface | 3 | Ring shaped contact portion |
| 1a | Distance vision zone | 4 | Notch |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.The embodiment of base in the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, all belong to the range protected in the utility model.
It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture)
Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the
Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning
The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one
A this feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not within the protection scope of the requires of the utility model.
The utility model provides a kind of double aspherical non-rotational symmetry refraction multifocal intraocular lenses, please refers to Fig. 1 extremely
Fig. 4, it is described in an embodiment of double aspherical non-rotational symmetry refraction multifocal intraocular lenses provided by the utility model
Double aspherical non-rotational symmetries reflect multifocal intraocular lenses 100
Optical section 1, the front surface 11 and rear surface 12 of the optical section 1 in etc. convex and aspherical convex outward setting,
The convex outward include the farther away distance vision zone 1b of focal length, the closer near vision zone 1a of focal length and be located at the distance vision zone
Transitional region 1c, the distance vision zone 1b and near vision zone 1a between domain 1b and near vision zone 1a is along the optical section 1
It is circumferentially distributed；
Ring shaped contact portion 3 is convexly equipped in the rear surface 12 of the optical section 1, and the periphery along the optical section 1 extends, and institute
The evagination size that 3 protrusion height of ring shaped contact portion is greater than the rear surface 12 is stated, the ring shaped contact portion 3 is to described artificial
It after Lens implantation eyeball, is contacted with the rear capsule of eyeball, the ring shaped contact portion 3 is equipped with notch 4；And
Two support loops 2, are symmetrically set in the outer peripheral surface of the optical section 1.
In technical solution provided by the utility model, the distance vision zone 1a and near vision zone 1b are along the optical section 1
Circumferential direction in distribution, compared with the existing technology in inner and outer ring setting the case where, it is provided by the utility model double aspherical non-
In rotational symmetry refraction multifocal intraocular lenses 100, transition region between the distance vision zone 1a and the near vision zone 1b
The length of domain 1c is shorter, so that light loss is smaller and makes vision apparent, and the distance vision zone 1a and the near vision zone
Interference between the 1b of domain is smaller, to effectively improve halo glare phenomenon.Also, it is convexly equipped in the rear surface 12 along institute
The ring shaped contact portion 3 that the periphery of optical section 1 extends is stated, is contacted by the ring shaped contact portion 3 with the inner surface of capsule after eyeball, with
Remaining proliferation of lens epithelial cells after cataract operation is stopped to move between the optical section 1 of artificial lens and rear capsule, simultaneously
It is arranged jagged 4 in the ring shaped contact portion 3, by the setting of the notch 4, reduces artificial lens and fold in installation process
The generation of the problems in stress collection is reduced and is damaged in folding process to caused by the optical section 1, and the notch 4 also increases
The elasticity of double aspherical non-rotational symmetry refraction multifocal intraocular lenses 100, becomes so that the folding of artificial lens is installed
It is more convenient to obtain.
Further, referring to Fig. 2, in the present embodiment, along the periphery of the optical section 1, in the ring shaped contact portion 3
It is even that multiple notches 4 are distributed with, so set, being more conducive to the folding of artificial lens, also, be conducive to reduce at folding
Stress, reduce stress raisers the problem of generation.
The size of the notch 4 influences whether to reduce the technical effect that stress is concentrated, in the present embodiment, the notch 4
Width be 0.6 to 0.8mm, so set, it is relatively preferable not only to reduce the technical effect that stress is concentrated, and to artificial lens
Intensity effect it is smaller.
The ring shaped contact portion 3 can touch everywhere with rear capsule for convenience, and the rear end face in the ring shaped contact portion 3 is in
Curved surface setting, so as to effectively completely keep apart in described other regions of optical section 1.Specifically, in the present embodiment,
The rear end face in the ring shaped contact portion 3 is arranged in arc surface.
The bulge size of the rear surface 12 should not be too big, when the bulge size of the rear surface 12 is too big, can make
Gap between the lower and rear capsule of the rear surface 12 is excessive, thus, double aspherical non-rotational symmetry refractions are multifocal
Stability of the point intraocular lens 100 in pouch is poor, please refers to Fig. 3 and Fig. 4, in the present embodiment, the rear surface 12
Protrusion height be h, h be 0.3 to 0.4mm.
Further, in order to ensure that the ring shaped contact portion 3 can preferably be contacted with the rear capsule, in the present embodiment, institute
State ring shaped contact portion 3 protrusion height H, H-h > 0.4mm.
In the present embodiment, the diopter difference of the distance vision zone 1a and near vision zone 1b is+3D, so that described remote
The focus difference of viewed area 1a and near vision zone 1b are maintained in a reasonable range, for example, working as the diopter of distance vision zone 1a
When for 20D, then the 23D of the diopter of near vision zone 1b.
In the present embodiment, the distance vision zone 1a and near vision zone 1b is from the center of the optical section 1
Extend outwardly, for this purpose, even if the optical section 1 when implantation is to rear capsule, will not be because of the long sight even if there is deviation slightly
The region 1a and near vision zone 1b is distributed in Internal and external cycle, and leads to the distance vision zone 1a and the near vision zone 1b deviation mistake
Greatly, visual effect is influenced.
It avoids focal length mutation occur in the intersection of the distance vision zone 1a and near vision zone 1b, and makes distance vision zone 1a
It is interfered with each other near vision zone 1b and serious halo glare phenomenon occurs, in the present embodiment, the width of the transitional region 1c
Spend from the center of the optical section 1 is in be gradually increased setting outward.
Further consider that the area of the transitional region 1c cannot be too big, once too big meeting so that light loss is relatively more, from
And make that user's is misted, and in the present embodiment, the distance vision zone 1a, near vision zone 1b and the transitional region
1c, area specific gravity correspond to 52%, 41% and 7%.
In order to avoid the support loop 2 is in bending deformation, by deformation power totally tansitive to the optical section 1, to make
The optical section 1 deformation occurs line, the thickness of the optical section 1 and the junction of each support loop 2 are corresponding to should be greater than
The thickness setting of loop 2 is supported, thus, the junction of the optical section 11 and each support loop 2, the deformation to the support loop 2
Power is absorbed or is stopped, and avoids totally tansitive to the optical section 1.
The above is only the preferred embodiment of the utility model, it is not intended to limit its scope of the patents, it is all practical using this
Equivalent structure or equivalent flow shift made by novel specification and accompanying drawing content is directly or indirectly used in other relevant skills
Art field, is also included in the patent protection scope of the utility model.
Claims (10)
1. a kind of double aspherical non-rotational symmetries reflect multifocal intraocular lenses characterized by comprising
Optical section, the front surface and rear surface of the optical section in etc. convex and aspherical convex outward setting, the outer evagination
Face include the farther away distance vision zone of focal length, the closer near vision zone of focal length and be located at the distance vision zone and near vision zone it
Between transitional region, the distance vision zone and near vision zone are along the circumferentially distributed of the optical section；
Ring shaped contact portion is convexly equipped in the rear surface of the optical section, and the periphery along the optical section extends, and the ring shaped contact
Portion's protrusion height is greater than the evagination size of the rear surface, and the ring shaped contact portion is in double aspherical non-rotational symmetries
After reflecting multifocal intraocular lenses implantation eyeball, contacted with the rear capsule of eyeball, the ring shaped contact portion is equipped with notch；With
And
Two support loops, are symmetrically set in the outer peripheral surface of the optical section.
2. double aspherical non-rotational symmetries as described in claim 1 reflect multifocal intraocular lenses, which is characterized in that along institute
The periphery of optical section is stated, multiple notches are evenly distributed in the ring shaped contact portion.
3. double aspherical non-rotational symmetries as described in claim 1 reflect multifocal intraocular lenses, which is characterized in that described
The width of notch is 0.6 to 0.8mm.
4. double aspherical non-rotational symmetries as described in claim 1 reflect multifocal intraocular lenses, which is characterized in that described
The rear end face in ring shaped contact portion is arranged in arc surface.
5. double aspherical non-rotational symmetries as described in claim 1 reflect multifocal intraocular lenses, which is characterized in that described
The protrusion height of rear surface is h, and h is 0.3 to 0.4mm.
6. double aspherical non-rotational symmetries as claimed in claim 5 reflect multifocal intraocular lenses, which is characterized in that described
Ring shaped contact portion protrusion height H, H-h > 0.4mm.
7. double aspherical non-rotational symmetries as described in claim 1 reflect multifocal intraocular lenses, which is characterized in that described
The diopter difference of distance vision zone and near vision zone is+3D.
8. double aspherical non-rotational symmetries as described in claim 1 reflect multifocal intraocular lenses, which is characterized in that described
Distance vision zone and the near vision zone extend outwardly from the center of the optical section；
The width of the transitional region is in be gradually increased setting from the center of the optical section outward.
9. double aspherical non-rotational symmetries as claimed in claim 8 reflect multifocal intraocular lenses, which is characterized in that described
Distance vision zone, near vision zone and the transitional region, area specific gravity correspond to 52%, 41% and 7%.
10. double aspherical non-rotational symmetries as described in claim 1 reflect multifocal intraocular lenses, which is characterized in that institute
The thickness for stating the junction of optical section and each support loop, to the thickness that should be greater than supporting loop accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721236636.1U CN208693535U (en) | 2017-09-25 | 2017-09-25 | Double aspherical non-rotational symmetries reflect multifocal intraocular lenses |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721236636.1U CN208693535U (en) | 2017-09-25 | 2017-09-25 | Double aspherical non-rotational symmetries reflect multifocal intraocular lenses |
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| CN208693535U true CN208693535U (en) | 2019-04-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110711050A (en) * | 2019-10-24 | 2020-01-21 | 西安浦勒生物科技有限公司 | Artificial lens |
| WO2023072031A1 (en) * | 2021-10-25 | 2023-05-04 | 天津世纪康泰生物医学工程有限公司 | Posterior chamber type progressive multi-focus phakic intraocular lens |
-
2017
- 2017-09-25 CN CN201721236636.1U patent/CN208693535U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110711050A (en) * | 2019-10-24 | 2020-01-21 | 西安浦勒生物科技有限公司 | Artificial lens |
| WO2023072031A1 (en) * | 2021-10-25 | 2023-05-04 | 天津世纪康泰生物医学工程有限公司 | Posterior chamber type progressive multi-focus phakic intraocular lens |
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