CN1933791A

CN1933791A - Posterior chamber phakic intraocular lens

Info

Publication number: CN1933791A
Application number: CN 200480040393
Authority: CN
Inventors: 乔治W·罗扎基斯; 伊戈尔G·瓦柳宁
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-14
Filing date: 2004-11-13
Publication date: 2007-03-21

Abstract

A phakic intraocular lens includes a body having a flat anterior-facing surface and a curved posterior-facing surface that defines the optical power of the lens. The lens allows fluid to flow between the phakic lens and the iris and between the phakic lens and the natural lens. An enlarged outer rim helps maintain the position of the lens. Some embodiments are provided with openings, channels, or both at the circumferential edge of the flat anterior-facing surface or the lens body to help prevent the flat surface of the lens from sealing against the iris.

Description

Posterior chamber phakic intraocular lens

Technical field

The present invention relates generally to intraocular lens, be specifically related to posterior chamber phakic intraocular lens (phakic intraocular lens).Specifically, the present invention relates to partly have the phakic intraocular lens of flat front and crooked rear surface at optics of lens.

Background technology

People know various posterior chamber phakic intraocular lens in the prior art.These lens directly are implanted to after the eye lens iris before.A shortcoming of these lens is to utilize iridotomy, allows liquid to flow to the anterior chamber of eyes from the back room of eyes.Prior art requires to utilize the implantation that does not have iridotomy.Another shortcoming of known lens is the restriction to the optics of lens portion size.Prior art requires to have big opticator lens.Prior art also requires the lens of this spline structure, and it does not disturb the liquid form of liquid in the eyes, meanwhile requires to have such structure, and it can remain on appointed positions in the eyes.The typical such sense of touch of known lens utilization, it is across the anterior chamber of eyes and mesh capsulociliary relative part and make lens fixing in place.Other lens utilize iris that lens are produced central force.Prior art requires such lens, and it does not rely on has too many contact to eyes, and remains on appointed positions, as known lens.

Summary of the invention

The invention provides a kind of have flat front and the phakic intraocular lens of crooked back optical surface with definite lens refractive power.These lens can be to utilize iridotomy or do not utilize iridotomy.These lens have registration arm, and it helps to keep the position at lens place in eyes.We openly are used for the various structures of registration arm.In one embodiment, registration arm is short, and it can not be wedged in the capsulociliary relative part.In one embodiment of the invention, the radius of curvature of registration arm rear surface is substantially equal to the radius of curvature of eye lens front surface.The present invention also provides a kind of lens that optical bodies and a pair of registration arm are arranged, and wherein the structure of lens is such, and the additional space of liquid is arranged after these lens, and it helps to keep these lens and eye lens to separate.

The present invention also provides a kind of has flat front and crooked back optical surface to determine the phakic intraocular lens of lens refractive power (optical power).These lens have and are arranged on the edge that increases around the opticator, and it can keep the assigned address of these lens in eyes.

The invention provides a kind of lens that joint is arranged between registration arm and opticator, when lens and iris engagement, the passage that this joint is determined can prevent to form between iris and the lens sealing.In another embodiment of the present invention, on opticator and/or registration arm, form perforate.

Another feature of the present invention is a kind of method based on eyes measurement result design lens.

Description of drawings

Fig. 1 is that phakic intraocular lens is implanted near the eyes profile of eye lens.

Fig. 2 is the front view of first embodiment of the invention lens.

Fig. 3 is the profile along Fig. 2 cathetus 3-3.

Fig. 4 is the front view of first embodiment lens, wherein between flat front and registration arm two relative passages is set.

Fig. 5 is the profile along Fig. 4 cathetus 5-5.

Fig. 5 A is the zoomed-in view of circular portion among Fig. 5.

Fig. 6 is the profile of first embodiment lens and eye lens, and it shows lens rear surface, the relative radius of registration arm rear surface and eye lens front surface.

Fig. 7 is the profile of second embodiment lens and eye lens, and it shows lens rear surface, the relative radius of registration arm rear surface and eye lens front surface.

Fig. 8 is the profile of the 3rd embodiment lens and eye lens, and it shows lens rear surface, the relative radius of registration arm rear surface and eye lens front surface.

Fig. 9 is the profile of the 4th embodiment lens and eye lens, and it shows lens rear surface, the relative radius of registration arm rear surface and eye lens front surface.

Figure 10 represents to have between the prior art lens of identical refractive power and the lens of the present invention relatively.

Numeral identical in this description is meant components identical.

The specific embodiment

The phakic intraocular lens of making according to notion of the present invention is to represent with numeral 10 in these accompanying drawings.Lens 10 are placed on the back room of eyes among Fig. 1.Eyes 12 comprise: cornea 14, iris 16 and eye lens 18.Phakic intraocular lens 10 is placed on after the iris 16 and before the eye lens 18, therefore, its influence enters into the light of eyes 12 crystalline lenses 18.

At least one pair of registration arm 20 is to extend from the relative both sides of lens 10, and it helps to keep the position of lens 10 with respect to eyes 12.The edge of registration arm 20 is the circular surfaces that contact with little band.Registration arm 20 is not designed to be wedged into capsulociliary two relative parts, but it can touch corpus ciliare or little band in different lens sizes and structure.In the prior art, we know the registration arm 20 of all kinds and shape, and any registration arm is adapted to lens of the present invention.From front view shown in Figure 2, registration arm 20 can be a rectangle.In other embodiments of the invention, three or four registration arm 20 with around between the opticator of lens 10 interval that equates is arranged.In other embodiment, registration arm 20 is that the opticator that entirely centers on lens 10 extends.

In each lens embodiment that this application is described, lenticular body has smooth preceding optical surface 30 and crooked back optical surface 32.The big tabular surface that preceding optical surface 30 forms is set directly at after the iris 16, therefore, moves under the situation about contacting with iris 16 at lens 10, and lens 10 just slide into the back of iris 16 smoothly.In most of embodiment, the diameter 34 of smooth preceding optical surface 30 is between 6mm and 9mm.In certain embodiments, this diameter 34 can be reduced to 4mm.The radius of curvature 36 of crooked back optical surface 32 is between 14mm and 21mm.Correct by the refractive index of measuring patient, and measure patient's eyes, can determine concrete size.This measurement can utilize ultrasonic technique to finish.The design of lens 10 is to carry out after the actual size of knowing eye lens and iris.For example, can measure spatial overall dimension between eye lens and the iris, and the design of size 44 is the wedgings that prevent lens 10 itself.Also can measure the curvature of eye lens 18 front surfaces, be used for determining suitable curvature 42 across crystalline lens 18.Under the application's linguistic context, term " flat surfaces " comprises such lens arrangement, and its front surface is slight curving to prevent unnecessary reflecting into into pupil.This curvature is unessential for the optical property of lens, and therefore, it remains in the scope of used in this description " flat surfaces " definition.

In the outer rim or the part outer rim of opticator, registration arm 20 is connected to the opticator of lens 10.When watching front view shown in Figure 2, registration arm 20 can have different shape.Fig. 2 represents a rectangular embodiment, and wherein orthogonal width is less than the diameter of lens 10 opticators.In another embodiment, orthogonal width equals the diameter of optics of lens part.Even optics of lens part and registration arm 20 are that integral body is made, registration arm 20 and optics of lens are connected the joint 40 that is referred to as lens 10 between partly.

Another feature of lens 10 is that the overall diameter of optics of lens part is the thickest zone (transverse section) of lens 10, and forms bulbous rim 41 around the outer rim of opticator.Yet edge 41 does not protrude from the flat front surface of lens 10.This zone is referred to as outer rim 41. edges 41 corresponding to the joint 40 in registration arm 20 positions.Thick rim 41 is placed on by eye lens 18, iris 16, the slit of determining between the little band of corpus ciliare and supporting eye lens 18 43.Thick bulbous rim 41 keeps lens 10 and pupil general position between the surface 30 afterwards.Another function at edge 41 is to prevent from that lens 10 from slipping into by little band to enter vitreous body.When eyes contacted with edge 41, edge 41 also can make eyes that lens 10 are produced central force.

The radius of curvature 42 of registration arm 20 is less than the radius 36 of optical surface after the bending 32.This arrangement can make the rear surface of lens 10 and eye lens 18 separate, thereby allows to have between lens 10 and the eye lens 18 space of liquid flow.Can see the additional space of this formation in comparative example shown in Figure 10, wherein the lens of identical refractive index and eye lens carry out overlapping.Be used to illustrate after the lens 10 additional fluid space is arranged.Added space is to represent with dash area in Figure 10.Exemplary lens shown in Figure 10 is US6, disclosed a kind of type lens in 015,435.Lens 10 form very big space between the rear surface of eye lens 18 and lens 10.This space allows liquid free-flow between lens 10 and eye lens 18 of eyes.In one embodiment of the invention, radius 42 equals the radius of curvature 43 of eye lens 18.Length 44 is greater than Fig. 6 between the two ends of registration arm 20, the overall diameter of eye lens 18 among 7 and 8 the embodiment.In Fig. 9, registration arm 20 is shorter, and length 44 is less than the overall diameter of eye lens 18 between its two ends.In the embodiment of Fig. 9, edge 41 may be bigger, and it can provide bigger central force.In addition, the embodiment of Fig. 9 meshes eye lens 18 little band on every side consistently.

Fig. 2,3 and 6 expression embodiments of the invention, wherein registration arm 20 is to be tapered to an end from joint, this joint limits a very sharp angle.In the embodiment of Fig. 6, radius 36 is 20mm, and radius 42 is that 10mm and radius 43 are 10mm.The diameter 34 of opticator is 7mm.Length 44 is 12mm between the registration arm two ends.

Figure 4 and 5 are and Fig. 2 and 3 similar embodiment, and different is, the joint of Figure 4 and 5 has passage 46, and it can prevent to form sealing between the joint 40 of lens 10 and the iris 16.Passage 46 is not the lenticular body of scioptics 10 entirely, shown in Fig. 5 A.In other embodiments of the invention, in joint 40 or registration arm 20, can form through hole.In another embodiment, little perforate is formed on the center of opticator.The diameter of this center drilling is 0.8mm.These passages and perforate allow liquid free-flow.

Fig. 7 represents another embodiment of joint 40 definite fillets.In the embodiment of Fig. 7, radius 36 is 14.9mm, and radius 42 is that 10mm and radius 43 are 10mm.The diameter 34 (in fillet) of opticator is 7.17mm, and the diameter 48 (outside fillet) of opticator is 8.03mm.Length 44 is 11.88mm between the registration arm two ends.

Fig. 8 represents that joint determines another embodiment of fillet.In the embodiment of Fig. 8, radius 36 is 18mm, and radius 42 is that 10mm and radius 43 are 10mm.The diameter 34 (in fillet) of opticator is 6.98mm, and the diameter 48 (outside fillet) of opticator is 7.18mm.Length 44 is 12mm between the registration arm two ends.In Fig. 8, registration arm has substantially invariable thickness in the vicinity of its outer end and planar outer ends.

Fig. 9 represents that joint determines another embodiment of fillet or smooth fillet.In the embodiment of Fig. 9, radius 36 is 14.9mm, and radius 42 is that 10mm and radius 43 are 10mm.The diameter 34 (in fillet) of opticator is 6.02mm.Length 44 is 8mm between the registration arm two ends.

Preferably, the lens among each embodiment of the present invention are to utilize acrylic acid to make.Yet the professional knows various lens materials.For example, well-known, the opticator of intraocular lens can utilize following material to make: polymethyl methacrylate, polymethylacrylic acid-2-hydroxyl ethyl ester, methylmethacrylate copolymer, siloxanylalkyl, fluoroalkyl and aryl methyl acrylic acid methyl ester., silicone, silicone elastomer, polysulfones, polyvinyl alcohol, polyethylene glycol oxide, fluoropropenes acid and methacrylic acid copolymer, with hydroxyalkyl methacrylate polymer and copolymer, for example, 2-hydroxyethyl methacrylate, and methacrylic acid, acrylic acid, acrylamide-MAAm, N, N-diisobutylene amide and N-vinyl pyrrolidone.In addition, () complex for example, below 400nm, for example, from the benzotriazole base, benzophenone base, or the deutero-complex of its mixture can add in the monomer and/or polymer that constitutes implant to absorb ultraviolet or other short wavelengths.Other complex of knowing in the prior art also can be used for making the opticator of lens 10 of the present invention.

Advantage of the present invention is that the flat front diameter of lens can have the diameter greater than lenses with curved front surfaces.The major diameter of back optical surface and long radius can make the lens of making that very large-scale refractive power is arranged, and for example, are not suitable for the needed refractive power of patient of cornea laser surgery.The major diameter opticator can also make haloing reduce to minimum.Big tabular surface can reduce the pressure to iris, and therefore, liquid can flow to the anterior chamber from the back room of eyes.In addition, even the joint of lens touches iris, passage of the present invention still allows liquid flow.So, do not need iridotomy can implant lens.The thick rim that is provided with around the optics of lens part can keep lens in appointed positions.

The implantation of lens can be first folded lens, makes folding lens slip into the pupil of eyes then.

In above description, in order to simplify, clear and easy to be clear, we have used some term.Do not have unnecessary restriction outside prior art requires, because these terms are to be used for purpose of description, it has wide significance.

In addition, description of the invention and explanation are as an example, and therefore, the present invention is not limited to described detail.

Claims

1. phakic intraocular lens comprises:

Smooth forward direction optical surface and the crooked back lenticular body to optical surface is arranged, and it determines the refractive power of these lens; And

This lenticular body has thick outer rim, is suitable for placing in eyes these lens.

2. according to the lens of claim 1, also comprise: the opticator of at least one registration arm and lenticular body; Being connected between registration arm and the opticator is joint; This joint has front surface.

3. according to the lens of claim 2, the front surface of its center tap is determined passage.

4. according to the lens of claim 2, its center tap is determined perforate.

5. according to the lens of claim 2, wherein the opticator of lenticular body is determined perforate.

6. according to the lens of claim 1, the diameter of wherein smooth forward direction optical surface is between 6mm and 9mm.

7. according to the lens of claim 1, the diameter of wherein smooth forward direction optical surface is between 4mm and 9mm.

8. according to the lens of claim 1, wherein crooked back is between 14mm and 21mm to the radius of curvature of optical surface.

9. according to the lens of claim 1, also comprise: at least one registration arm, it is connected to outer rim and stretches out from outer rim; Registration arm has crooked rear surface.

10. according to the lens of claim 9, wherein crooked back is between 14mm and 21mm to the radius of curvature of optical surface; The radius of curvature of the crooked rear surface of this at least one registration arm less than bending after to the radius of curvature of optical surface.

11. according to the lens of claim 9, wherein lens are to be used in combination with eye lens, its front surface has radius of curvature; The crooked back of lenticular body is to the radius of curvature of the optical surface radius of curvature greater than eye lens; The crooked back radius of curvature that equals the eye lens front surface to the radius of curvature on surface with this at least one registration arm.

12. according to the lens of claim 11, wherein the overall diameter of lenticular body and at least one registration arm is greater than the overall diameter of eye lens.

13. according to the lens of claim 11, wherein the overall diameter of lenticular body and at least one registration arm is less than the overall diameter of eye lens.

14., two registration arm of extending from outer rim are arranged wherein according to the lens of claim 13.

15. a phakic intraocular lens comprises:

Smooth forward direction optical surface and the crooked back lenticular body to optical surface is arranged, and it determines the refractive power of these lens;

Radius of curvature to optical surface after this bending is between 12mm and 21mm;

This lenticular body has thick outer rim, is suitable for placing in eyes these lens;

A pair of registration arm from the outer rim extension; Each registration arm has crooked rear surface; With

The crooked rear surface radius of curvature of this at least one registration arm less than bending after to the radius of curvature of optical surface.

16. according to the lens of claim 15, the diameter of wherein smooth forward direction optical surface is between 6mm and 9mm.

17. according to the lens of claim 16, wherein Zu He registration arm has overall diameter; This overall diameter is less than 11mm.