JP2010188067A - Soft intraocular lens and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soft intraocular lens which facilitates confirmation of the condition of the same when the lens is folded or of the tip positions of support arm sections when inserting the intraocular lens by improving visibility even though most parts of the intraocular lens itself are colorless and transparent or pale-colored and transparent. <P>SOLUTION: The soft intraocular lens 1 has an optical lens section 10 made of a soft and foldable material and the support arm sections 20 extending outward from the circumference of the optical lens section 10 for holding the optical lens section 10 within the eye. Proximal parts of the support arm sections 20 and the soft material forming the intraocular lens 10 are made of a colorless and transparent or a pale-colored and transparent material, and distal parts 22 of the support arm sections 20 are made of a colored material having improved visibility compared to the other parts of the intraocular lens. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a soft intraocular lens that is inserted into an aphakic eye after cataract surgery, or a soft intraocular lens for a phakic lens that is inserted into the eye in refractive surgery, and is particularly small in a folded state. The present invention relates to an intraocular lens suitable for insertion into an eye from an incision, and a method for manufacturing the same.

  For example, when the lens becomes cloudy due to cataract, the eyesight can be recovered by a surgical procedure in which an intraocular lens, which is an artificial lens, is inserted into the eye instead of the clouded lens. The intraocular lens used at this time includes a substantially circular or substantially elliptical optical lens part, and a support arm part extending outward from the outer peripheral edge of the optical lens part in order to stabilize the optical lens part in the eye ( It is also called “tactile part” because it resembles the tactile sensation of insects.

  In this type of intraocular lens, the optical lens part is composed of a hard intraocular lens made of a hard material such as PMMA (polymethylmethacrylate-acrylic resin) and a soft material such as silicon elastomer or soft acrylic. There are soft intraocular lenses.

  When using a hard intraocular lens, an incision with the same width as the diameter of the optical lens part must be made in the cornea or sclera, and the lens must be inserted, whereas a soft intraocular lens is used. In this case, the optical lens unit can be folded and inserted through an incision smaller than the diameter of the optical lens unit.

  In order to reduce corneal astigmatism and infection after surgery, it is preferable to insert a lens through a small incision. In addition, various injectors have been developed to insert an intraocular lens through a smaller incision, and a soft intraocular lens that can be inserted through a small incision is currently widely used in clinical practice.

  When categorizing soft intraocular lenses from the structural aspect, the optical lens part and the supporting arm part are made of different materials, and the optical lens part and the supporting arm part are made of the same material. And divided.

  The intraocular lens of the type in which the optical lens part and the support arm part are made of different materials is generally a substantially circular optical lens part made of a soft material such as foldable silicon, acrylic resin, hydrogel, and the like. It is composed of a support arm made of a hard material such as polypropylene or polymethyl methacrylate, which is relatively harder than that, and can be obtained, for example, by attaching the support arm by bonding or the like after manufacturing the optical lens part. . It is said that the support arm is hard and tight, so the stability in the eye is relatively good, but the manufacturing process is complicated and the manufacturing cost is high, or the optical lens part and the support arm part There is a possibility that defects may occur at the joints.

  Also, unlike the case where the optical lens unit and the support arm unit are integrally coupled by bonding or the like, the lens is cut out from the lens blank in which the soft material and the hard material are coupled as in the technique described in Patent Document 1. Also disclosed is a method of integrally producing an intraocular lens composed of a soft optical lens portion and a hard support arm portion.

However, since the conventional intraocular lens obtained by this type of method is composed of a hard material from the joint to the tip of the support arm, the lens is folded and inserted from a small incision using an injector. At this time, the support arm portion made of a hard material is damaged, or an excessive force is applied to the joint portion of the support arm portion, which is a boundary portion of different materials, so that the support arm portion is peeled off or damaged. Had the problem.

  On the other hand, the intraocular lens of the type in which the optical lens portion and the support arm portion are made of the same soft material as shown in Patent Document 2, the above-described optical lens portion and the support arm portion are made of different materials. Compared with the type of intraocular lens constructed from the above, there is no problem of breakage, peeling or disconnection of the supporting arm part, and the manufacturing method is relatively simple.

JP-A-4-295353 Japanese National Patent Publication No. 10-513099

  Normally, when inserting a soft intraocular lens, which is composed entirely of a soft material, into the eye, the lens is folded into a small size so as to fit in the injector. For example, the optical lens unit is folded in two so that the distal end side of the support arm is sandwiched inside, and the lens is inserted into the injector, and in this state, the lens is inserted into the eye from the distal end opening of the injector. When the lens is inserted into the eye, the support arm portion is developed in the eye together with the optical lens portion to restore the original shape. Therefore, there is an advantage that the insertion operation into the eye can be easily performed.

  However, in this type of conventional soft intraocular lens, the support arm portion is made of the same colorless and light-colored soft material as the optical lens portion. Because the optical lens part is colored the same as the support arm part, when the optical lens part is folded in two so that the tip side of the support arm part is sandwiched inside, the state of the optical lens part and the support arm part is confirmed. In addition, the position of the tip of the support arm when the intraocular lens is inserted cannot be easily confirmed, and it may not be possible to easily determine whether or not the support arm is normally folded. If it is not folded correctly, the intraocular lens may not be restored to its original shape and may not be placed in the eye, or may not be placed in the intended position in the eye. Even if it did not happen, it was a factor that puts a strong stress on the surgeon.

  In consideration of the above circumstances, the present invention can improve the visibility of the intraocular lens itself, in which many parts are configured to be colorless and light-colored transparent, confirm the state when the lens is folded, and insert the intraocular lens. Since it becomes easy to confirm the position of the tip of the support arm at the time, it becomes easier to handle the intraocular lens, thereby contributing to the improvement of the success rate of lens insertion surgery, An object of the present invention is to provide a soft intraocular lens that can reduce the burden on the surgeon and a method for manufacturing the same.

  In order to solve the above-mentioned problems, a soft intraocular lens according to a first aspect of the present invention includes an optical lens unit made of a foldable flexible material, and an optical lens unit for holding the optical lens unit in the eye. A soft intraocular lens having a support arm portion formed so as to extend outward from the outer peripheral edge, and a soft material constituting the base end side portion of the support arm portion and the optical lens portion is colorless or transparent It is made of a light-colored transparent material, and the distal end portion of the support arm portion is made of a colored material having higher visibility than other portions of the soft intraocular lens.

Invention of Claim 2 is a soft intraocular lens of Claim 1, Comprising: The adhesiveness of the front-end | tip part of the said support arm part becomes lower than the adhesiveness of the other part of the said soft intraocular lens. It is characterized by being set to.

  A third aspect of the invention is the soft intraocular lens according to the first aspect, wherein the distal end portion of the support arm portion is made of a different material harder than the soft material of the other part of the soft intraocular lens. It is characterized by being composed.

  Invention of Claim 4 is the soft intraocular lens of Claim 1 or 2, Comprising: The said coloring material which comprises the front-end | tip part of the said support arm part, and another part of the said soft intraocular lens, The boundary portion between the proximal end portion of the support arm portion on the inner peripheral side from the distal end portion and the soft material constituting the optical lens portion is formed by a circle having a radius of 5 mm centering on the center of the optical lens portion. Is also provided outside.

  The invention according to claim 5 is the soft intraocular lens according to claim 3, wherein the hard material constituting the distal end portion of the support arm portion and the other portion of the soft intraocular lens, the distal end The portion of the support arm portion on the inner peripheral side from the portion and the boundary portion with the soft material constituting the optical lens portion is outside the circle with a radius of 5 mm centering on the center of the optical lens portion. It is characterized by being provided.

  The invention according to claim 6 is the soft intraocular lens according to any one of claims 3 and 5, wherein the hard material is a hard material mainly composed of PMMA (polymethyl methacrylate-acrylic resin). It is characterized by being plastic.

  The invention according to claim 7 is the soft intraocular lens according to any one of claims 3 to 5, wherein the width of the support arm portion is 0.2 mm or more at a narrowest portion. It is said.

Invention of Claim 8 is a manufacturing method of the soft intraocular lens of any one of Claim 3, 5-7,
By machining a cylindrical rod shape in which a soft material is concentrically arranged on the inner peripheral side and a hard material is arranged on the outer peripheral side, the tip end portion of the support arm portion is made of the hard material, and the soft intraocular lens Another part is a soft intraocular lens in which the portion on the proximal end side of the support arm portion on the inner peripheral side from the distal end portion and the optical lens portion are made of the soft material.

  From the viewpoint of securing appropriate visual acuity and visual field after insertion into the eye, colorless, transparent or light-colored transparent soft materials are widely used as soft intraocular lens materials. That is, an optical lens portion and a support arm portion that are made of a soft material having the same coloring are widely used. When the support arm is inserted into the optical lens unit folded in half when inserted into the eye, the optical lens unit is generally colored the same as the support arm unit. It is not possible to easily check the state of the arm or the position of the tip of the support arm when inserting the intraocular lens, and the intraocular lens may be placed in the eye without restoring the original shape. There is also a risk that it will not be installed at the intended position in the eye.

In that respect, according to the first aspect of the present invention, since only the tip of the support arm is made of a colored material having improved visibility, many portions of the intraocular lens itself that is configured to be colorless and light-colored transparent are used. Visibility can be improved and handling becomes easy. In addition, it is possible to easily confirm the state when the lens is folded and the position of the distal end portion of the support arm when the intraocular lens is inserted, thereby contributing to an improvement in the success rate of lens insertion. That is, since the position of the tip of the support arm can be easily confirmed by being colored, the support arm can be compared with an intraocular lens in which the entire support arm is colored. It becomes possible to more easily determine whether or not it is normally folded. In addition, when there are a plurality of supporting arm portions, the colors of the tip portions may be different as red and blue.

  According to the invention of claim 2, the adhesiveness of the distal end portion of the support arm portion is lowered (set lower) than the adhesiveness of the proximal end portion of the support arm portion and the optical lens portion. When the lens is folded for insertion into the eye using an injector, even if the tip of the support arm contacts the surface of the optical lens, the tip is less likely to stick to the surface of the optical lens. . If it sticks, the part where the support arm is stuck will not peel off naturally even after insertion into the eye, so the surgeon forcibly removes the support arm from the optical lens part to the original shape. It often happened that you had to do the operation of stretching, causing damage to the lens when peeling, and even if it did not damage the lens, it was a factor that puts a strong stress on the operator, Such troubles can be reduced.

  According to the invention of claim 3, since the tip end portion of the support arm portion is made of a hard material, the tip end portion of the support arm portion is an optical lens when the lens is folded for insertion using an injector. Even if it comes into contact with the surface of the optical part, it becomes difficult for the tip part to stick to the surface of the optical lens part. If it sticks, the part where the support arm is stuck will not peel off naturally even after insertion into the eye, so the surgeon forcibly removes the support arm from the optical lens part to the original shape. It often happened that you had to do the operation of stretching, causing damage to the lens when peeling, and even if it did not damage the lens, it was a factor that puts a strong stress on the operator, Such troubles can be reduced. In addition, since the base end portion of the support arm portion is made of the same soft material as the optical lens portion, unlike the conventional intraocular lens in which the support arm portion is made of a hard material, The problem of disconnection or peeling can be reduced.

  In the present specification, “adhesiveness” refers to the property of sticking or adsorbing when the members come into contact with each other, so-called “ease of sticking”.

  According to the invention of claim 4, since the portion made of the coloring material is present outside the circle having a radius of 5 mm centered on the center of the optical lens portion, the distal end portion of the support arm portion when the intraocular lens is inserted The position of the lens can be confirmed more easily, which can contribute to an improvement in the success rate of lens insertion. In other words, since the position of the tip of the support arm can be more easily confirmed by being colored, the support arm can be compared with an intraocular lens in which the entire support arm is colored. It becomes possible to more easily determine whether or not the folder is normally folded.

  According to the invention of claim 5, the portion made of the hard material is present outside the circle with a radius of 5 mm centered on the center of the optical lens portion, so the portion made of the hard material is unnecessarily large. There is no end to it. Therefore, when a lens is inserted into the eye using a small-diameter injector, the risk of clogging the lens inside the injector due to the size of the hard portion can be reduced. That is, since the flexibility of the base end side portion of the support arm portion can be sufficiently ensured, the possibility of clogging can be reduced.

  In general, the total length of the intraocular lens (when the support arm is symmetrically provided outside the optical lens, the distance from the tip of one support arm to the tip of the other support arm) is 12 mm or more. If the tip of the hard support arm is provided on the inner side of a circle with a radius of 5 mm centered on the center of the optical lens part, the ratio of the hard part to the support arm becomes high, and the support arm The possibility of breakage or peeling of the part increases. Moreover, when inserting in an injector, a hard part comes to influence the bending performance of a support arm part, and a possibility that a support arm part becomes difficult to bend appropriately arises. However, in the invention of claim 5, such a phenomenon can be avoided by setting the range where the hard portion exists outside the circle having a radius of 5 mm.

  According to the invention of claim 6, since the hard material is a hard plastic mainly composed of PMMA, it is possible to provide an intraocular lens that is relatively inexpensive and highly safe in vivo.

  According to the invention of claim 7, since the width of the support arm portion is 0.2 mm or more at the narrowest portion, the invention of claims 2 to 5 is carried out without impairing the restoring property of the support arm portion after insertion into the eye. The effect of can be produced.

  According to the eighth aspect of the invention, it is possible to easily and accurately manufacture an intraocular lens in which only a part of the portion (the tip portion of the support arm portion) is made of a different material. At that time, since the soft portion (the portion on the base end side of the support arm portion and the optical lens portion) can be processed with the hard portion on the outer peripheral side as a support, the manufacturing can be facilitated.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the soft intraocular lens of one Embodiment of this invention, (a) is a front view, (b) is the side view. It is a figure which shows the state which folded and inserted the same soft intraocular lens inside the cartridge of an injector. (A)-(d) is explanatory drawing of the manufacturing process of the intraocular lens. It is a top view of the soft intraocular lens of other embodiment of this invention. It is a top view of the soft intraocular lens of further another embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1A is a front view of a soft intraocular lens according to an embodiment of the present invention, FIG. 1B is a side view thereof, and FIG. 2 is a diagram illustrating a case where the soft intraocular lens of the embodiment is folded and inserted into an injector cartridge. It is a side view which shows the state which carried out.

  As shown in FIG. 1, this soft intraocular lens (hereinafter also referred to as “intraocular lens” or simply “lens”) 1 includes an optical lens unit 10 made of a foldable flexible material, and the optical lens unit 10. And two support arms 20 having a curved shape formed so as to extend outward from the outer peripheral edge. The optical lens unit 10 is formed as a circular convex lens.

  The support arm unit 20 holds and fixes the optical lens unit 10 in the eye, and two support arm units 20 are provided in a point-symmetrical positional relationship with the center O of the optical lens unit 10 as the center of symmetry. The two support arm portions 20 are curved in the same direction (counterclockwise in FIG. 1A), so that the front and back of the lens 1 can be distinguished by the direction of the curvature.

In these support arm portions 20, the proximal end portion 21 on the inner peripheral side of the distal end portion 22 is made of the same material as the optical lens portion 10, but only the distal end portion 22 is made of a different material. .
Here, the soft material constituting the base end portion 21 of the support arm portion 20 and the optical lens portion 10 is made of a colorless transparent or light-colored transparent material, and only the distal end portion 22 of the support arm portion 20 is the soft intraocular. It is made of a coloring material that is more visible than other parts of the lens. Thus, by using a coloring material with improved visibility only for the distal end portion 22 of the support arm portion 20, the surgeon can easily identify the distal end portion 22 and other portions.

Further, the other part of the soft intraocular lens 1, that is, the proximal end portion 21 of the support arm 20 and the optical lens unit 10 are soft materials such as a soft acrylic material, a silicon-based material, a hydrogel, and a urethane-based material. It is preferable that the front end portion 22 of the support arm portion 20 is made of a hard plastic material (hard material) whose main component is, for example, polymethyl methacrylate (PMMA). In this way, only the material of the distal end portion 22 of the support arm portion 20 is made of a hard material, and the adhesiveness of the distal end portion 22 of the support arm portion 20 is the other portion of the soft intraocular lens 1, that is, the distal end portion 22. It is preferably set lower than the adhesiveness of the proximal end portion 21 of the support arm portion 20 on the inner peripheral side and the optical lens portion 10. In addition, this intraocular lens 1 is comprised integrally from the optical lens part 10 to the front-end | tip part 22 of the support arm part 20, and is equivalent to what is called what is called a one-piece type intraocular lens.

  The total length L of the intraocular lens 1 (the distance from the tip of one support arm to the tip of the other support arm) may be any suitable size, but is preferably in the range of 11 mm to 14 mm. Most preferably, it is 12.5 mm. The optical lens unit 10 has a front surface (FC surface) 11 and a rear surface (BC surface) 12, and the diameter D may be any size as long as it is an appropriate value, but is preferably in the range of 5 mm to 7 mm. Yes, most preferably 6 mm. The thickness of the optical lens unit 10 varies depending on the desired refractive power and the refractive index of the material used.

  The shape of the support arm portion 20 may be any shape as long as it is a curved shape capable of stabilizing the intraocular lens 1 after insertion into the eye, but the support arm portion is maintained in order to maintain the restoring property of the support arm portion after insertion into the eye. The width of the portion 20 is preferably 0.2 mm or more at the narrowest portion Ws.

  In addition, R in FIG. 1A indicates the radius of a circle centered on the center O of the optical lens unit 10, and the tip 22 of the support arm unit 20 made of a coloring material has R = 5 mm. It is preferable to provide it outside the circle. In other words, the coloring material constituting the distal end portion 22 of the support arm portion 20, the proximal end side portion 21 of the support arm portion 20 on the inner peripheral side from the distal end portion 22, and the optical lens portion 10 are configured to be colorless and transparent or It is desirable that the boundary portion 25 with the soft material made of a light-colored transparent material is provided outside a circle having a radius of 5 mm with the center O of the optical lens portion 10 as the center.

  With this setting, as shown in FIG. 2, when the optical lens unit 10 is folded in two so as to sandwich the support arm unit 20 in order to insert the intraocular lens 1 into the cartridge 50 of the injector. Only the necessary tip portion sandwiched between the optical lens portions 10 can be used as a coloring material. Accordingly, the position of the distal end portion of the support arm portion when the intraocular lens is inserted can be more easily confirmed, and the support arm portion can be compared with an intraocular lens in which the entire support arm portion is colored. It becomes possible to more easily determine whether or not it is normally folded.

  Further, even when the tip portion 22 is made of a coloring material and is made of a hard material, the tip portion 22 is preferably provided outside a circle of R = 5 mm. In other words, the hard material constituting the distal end portion 22 of the support arm portion 20 and the soft material constituting the proximal end portion 21 and the optical lens portion 10 of the support arm portion 20 on the inner peripheral side from the distal end portion 22. It is desirable that the boundary portion 25 is provided outside a circle having a radius of 5 mm with the center O of the optical lens portion 10 as the center.

  With this setting, when the optical lens unit 10 is folded in two so as to sandwich the support arm unit 20 in order to insert the intraocular lens 1 into the cartridge 50 of the injector, the optical lens unit 10 is inserted into the optical lens unit 10. Only the necessary tip portion can be made of a hard material, and the hard portion is not unnecessarily enlarged. Therefore, when the lens 1 is inserted into the eye using a small-diameter injector, the risk of clogging the lens 1 inside the injector due to the size of the hard tip 22 can be reduced.

  Incidentally, when the hard region is expanded inward from the circle of R = 5 mm, the ratio of the hard portion to the support arm portion 20 increases, and the possibility of breakage or peeling of the support arm portion 20 increases.

  According to the intraocular lens 1 of the present embodiment having the above configuration, since only the distal end portion 22 of the support arm portion 20 is made of a colored material with improved visibility, many portions are configured to be colorless and transparent or light and transparent. The visibility of the existing intraocular lens 1 itself can be improved, and handling becomes easy. Further, the state when the lens 1 is folded and the position of the distal end portion 22 of the support arm 20 when the intraocular lens 1 is inserted can be easily confirmed, which contributes to an improvement in the success rate of lens insertion. be able to. That is, the position of the tip 22 of the support arm 20 can be easily confirmed by the color, so that it can be easily determined whether or not the support arm 20 is normally folded. Become. Further, the visibility of the support arm 20 is increased, so that the burden on the operator can be reduced. In addition, you may change the color of the front-end | tip part 22 of the two support arm parts 20 like red and blue.

  Moreover, in this intraocular lens 1, since only the front-end | tip part 22 of the support arm part 20 is comprised with the hard material, when the lens 1 is folded for insertion using an injector, as shown in FIG. Even if the distal end portion 22 of the support arm portion 20 contacts the surface of the optical lens portion 10, the distal end portion 22 becomes difficult to stick to the surface of the optical lens portion 10. This makes it easier for the support arm 20 to unfold into the original shape after the lens 1 is pushed out of the injector cartridge 50 as shown by arrow A in FIG. 2 and inserted into the eye, thus reducing the burden on the operator. Can do. Further, since the proximal end portion 21 of the support arm portion 20 is made of the same soft material as the optical lens portion 20, the optical lens portion 10 and the support arm portion 20 substantially function as the same soft intraocular lens. Therefore, unlike a conventional intraocular lens in which the entire support arm portion is made of a hard material, the problem of breakage, disconnection, or peeling of the support arm portion 20 can be reduced.

  In addition, since this intraocular lens 1 uses a hard plastic mainly composed of PMMA as a hard material, it is possible to provide an intraocular lens that is relatively inexpensive and highly safe in vivo.

  Next, an embodiment of a method for manufacturing the intraocular lens 1 having the above configuration will be described.

  In the manufacturing method of this embodiment, first, as shown in FIG. 3A, a colored hard part constituting member (hereinafter also referred to as a colored hard material) having a substantially donut shape made of PMMA using a known molding method. ) Get 100. For example, the colored hard part constituting member 100 is obtained by opening the circular hole 110 in the center part of the button material formed by coloring PMMA into a substantially disk shape.

  Next, the raw material liquid 200 that becomes soft acrylic after polymerization is injected into the circular hole 110 at the center of the colored hard part constituting member 100 to complete the polymerization. As a result, as shown in (b), the soft material 250 constituting the proximal end portion 21 of the optical lens portion 10 and the supporting arm portion 20 and the colored hard portion constituting member constituting the distal end portion 22 of the supporting arm portion 20. A disk-shaped raw material 300 integrally formed with (colored hard material) 100 is obtained.

  Next, as shown in (c), surface formation processing is performed on the front and back surfaces of the disk-shaped raw material 300 using a precision lathe device. As a result, an intermediate member 350 having a disk shape in plan view having the shape of the front and back surfaces of the intraocular lens is obtained. Since the colored hard portion constituting member 100 can be gripped when the surface forming process is performed by this precision lathe, it can be positioned with high accuracy and can be easily processed.

  Next, as shown in (d), a planar view contour shape like a solid line is formed using a milling device. Finally, polishing is performed to obtain a one-piece type intraocular lens 1 as shown in FIG.

Here, a specific example of dimensions of the intraocular lens 1 shown in FIG.
5 mm, the diameter D of the optical lens portion 10 is, for example, 6 mm, the thickness of the center of the optical lens portion 10 is, for example, 0.7 mm, and the width of the support arm portion 20 is, for example, 0.4 mm at the narrowest portion (Ws). The thickness of the support arm portion 20 is, for example, 0.4 mm, and the colored and hard tip portion 22 is provided outside the circle of, for example, R = 5.55 mm, and the thickness thereof is, for example, 0.4 mm.

  In addition, examples of soft materials for the optical lens portion 10 and the support arm portion 20 include silicon materials, hydrogels, urethane materials, etc., and examples of colored hard materials include other hard acrylic materials. , Polyamide, polypropylene and the like. Of course, you may add a coloring agent and a ultraviolet absorber to each material as needed.

  FIG. 4 shows the configuration of a soft intraocular lens 501 according to another embodiment of the present invention. In this intraocular lens 501, four support arm portions 20 are provided around the optical lens portion 10, and each tip portion 22 of the support arm portion 20 is made of a colored hard material. A portion 21 on the proximal end side of the arm portion 20 is made of a soft material.

  FIG. 5 shows the configuration of a soft intraocular lens 601 according to still another embodiment of the present invention. In this intraocular lens 601, the support arm 20 is bifurcated at symmetrical positions on the outer periphery of the optical lens 10, and each tip 22 of the support arm 20 is made of a colored hard material. The base portion 21 of the lens portion 10 and the support arm portion 20 is made of a soft material.

  Thus, when the front-end | tip part 22 of the support arm part 20 is comprised with the coloring hard material, it becomes difficult to stick to the surface of the optical lens part 10, and there exists an effect similar to embodiment shown in FIG.

  In the above embodiment, the material of the tip portion 22 of the support arm portion 20 is made of a colored hard material to reduce the stickiness of the tip portion 22. However, if only the stickiness is reduced, only the tip portion 22 is applied. It is also possible to apply a graining process.

  Moreover, the manufacturing method of the said one-piece type intraocular lens 1 is utilized also when processing the intraocular lens which consists of a single material to which the front-end | tip part 22 of the support arm part 20 is comprised with the soft material with high precision. be able to. In this case, the colored hard material 100 integrally formed around the soft material 250 does not become a constituent member of the intraocular lens, but can hold the colored hard portion constituent member 100 during the surface forming process. Therefore, the surface can be formed with high accuracy.

DESCRIPTION OF SYMBOLS 1 Intraocular lens 10 Optical lens part 20 Support arm part 21 Base part 22 Front part 25 Boundary part 50 Injector cartridge 100 Colored hard part structural member (colored hard material)
250 Soft material

Claims (8)

An optical lens portion made of a foldable flexible material, and a support arm portion formed to extend outward from the outer peripheral edge of the optical lens portion to hold the optical lens portion in the eye In soft intraocular lenses,
The soft material constituting the base end side portion of the support arm portion and the optical lens portion is made of a colorless transparent or light-colored transparent material, and the distal end portion of the support arm portion is more than the other portions of the soft intraocular lens. A soft intraocular lens comprising a coloring material with improved visibility. The soft intraocular lens according to claim 1,
A soft intraocular lens, wherein the adhesiveness of the tip of the support arm is set to be lower than the adhesiveness of other parts of the soft intraocular lens. The soft intraocular lens according to claim 1,
A soft intraocular lens, wherein a distal end portion of the support arm portion is made of a different material that is harder than a soft material of another part of the soft intraocular lens. The soft intraocular lens according to claim 1 or 2,
The coloring material constituting the distal end portion of the support arm portion, the other portion of the soft intraocular lens, the proximal end portion of the support arm portion on the inner peripheral side from the distal end portion, and the optical lens portion The soft intraocular lens is characterized in that a boundary portion with the soft material constituting the lens is provided outside a circle having a radius of 5 mm centered on the center of the optical lens portion. The soft intraocular lens according to claim 3,
The hard material constituting the distal end portion of the support arm portion, the other portion of the soft intraocular lens, the proximal end portion of the support arm portion on the inner peripheral side from the distal end portion, and the optical lens portion The soft intraocular lens is characterized in that a boundary portion with the soft material constituting the lens is provided outside a circle having a radius of 5 mm centered on the center of the optical lens portion. The soft intraocular lens according to any one of claims 3 and 5,
The soft intraocular lens, wherein the hard material is a hard plastic mainly composed of PMMA (polymethyl methacrylate-acrylic resin). The soft intraocular lens according to any one of claims 3, 5 to 6,
A soft intraocular lens, wherein the width of the support arm portion is 0.2 mm or more at a narrowest portion. It is a manufacturing method of the soft intraocular lens of any one of Claims 3-5,
By machining a cylindrical rod shape in which a soft material is concentrically arranged on the inner peripheral side and a hard material is arranged on the outer peripheral side, the tip end portion of the support arm portion is made of the hard material, and the soft intraocular lens A soft eye characterized by obtaining a soft intraocular lens in which the optical lens portion and the optical lens portion, which are other portions on the inner peripheral side of the distal end portion and the optical lens portion, are made of the soft material. Manufacturing method of inner lens.

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