JP3103692B2 - Jig for mounting the support member of the intraocular lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for mounting a support member having a structure for holding an intraocular lens around a lens body with fins.

[0002]

2. Description of the Related Art An intraocular lens that replaces the crystalline lens of the eyeball,
Stable fixation in the capsular bag is important. Therefore, as in an intraocular lens described in JP-A-63-89154, a support member having a pair of arms is made of an elastic polymer material such as polyimide. A plurality of fins formed on the supporting member are stuck in a circumferential direction alternately to a peripheral portion of the back surface or the front surface of the intraocular lens, so that the fins sandwich the lens body. A lens is used.

In order to mount the above-mentioned support member on the peripheral portion of the lens body constituting the intraocular lens, conventionally, the support member is placed on a workbench, the lens body is placed thereon, and one hand is used. While pinching the two, operate the tweezers with the other finger, pinch the fins one by one with the tip, and work so that the fins abut on the front or back surface in the circumferential part of the intraocular lens alternately in the circumferential direction. I was

[0004]

2. Description of the Related Art However, since the above-mentioned mounting operation using tweezers and fingers is an extremely fine operation performed under a microscope, the operation is time-consuming and costly, and also requires skill. For inexperienced workers, the tip of tweezers may damage the surface of the body of the intraocular lens, or the mounting state may be incompatible, the intraocular lens may fall off the support member, or the fin may be bent greatly This causes the elasticity of the fins to deteriorate, which causes a problem that the lens main body is displaced from the center after the insertion of the intraocular lens, and the visual acuity of the patient is extremely reduced.

[0005]

In order to solve the above-mentioned problems of the prior art, the present invention provides a jig for mounting a support member of an intraocular lens (hereinafter, abbreviated as a jig) to a lens of an intraocular lens. An upper rod and a lower rod having substantially the same outer diameter as the main body in horizontal cross section are formed, and a lens holding concave sphere having a smooth spherical surface is formed at a lower end portion of the upper rod, and a lens is provided on the lens holding concave sphere. The upper rod and the lower rod are connected coaxially under the state where the main body is fitted, and the upper end peripheral portion of the lower rod corresponds to every other fin of the support member in the circumferential direction among the fins of the support member Steps were formed at these positions to accommodate these fins in the horizontal direction.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an upper bar 10 and a lower bar 20 having substantially the same outer diameter in a horizontal cross section constituting a jig 1 according to the present embodiment, and an upper end portion 11 having a tapered tapered shape. Stick 1
A lens holding concave part 14 having a smooth spherical surface 13 is formed at the lower end part 12 of the lens unit 0, and the following lens body constituting the intraocular lens 40 (see FIG. 3) is fitted into the lens holding concave spherical part 14. Under the combined state, the upper bar 10 and the lower bar 20 are connected coaxially (see FIGS. 5 and 6). On the other hand, the lower rod 20 upper peripheral site, for each 90 ° to the central axis, each with a opening of 50 °, the radial width W ₁ and the width T four stepped portions of the same vertical 21 are formed.

FIG. 2 shows a lens body 4 by the jig 1.
0 (see FIG. 3) shows a support member 30 made of a polymer elastic material having no harm to the living body such as polyimide, which is inserted into a peripheral portion of the arm 3 (see FIG. 3).
2,32 together with are extended integrally, on the inner circumferential side horizontal direction of the annular portion 8 of the fins F (F _1, F ₂₎ is extended integrally.

Incidentally, as shown in FIG.
(F ₁ , F ₂ ) is the center point M of the annular portion 31 in plan view.
, Each fin F (F ₁ , F ₂ ) is formed with an opening of about 45 ° with respect to the center point M,
A slight gap is formed between two circumferentially adjacent fins F ₁ and F ₂ . Further, the radial width W ₂ of the fin F is smaller than the radial width W ₁ and the vertical width T (see FIG. 1) of the step portion 21 formed on the lower rod 20 of the jig 1. can accommodate fins F ₂ horizontally oriented (see FIG. 5).

FIG. 3 shows a lens body 4 by the jig 1.
0 shows the intraocular lens 2 with the support member 30 attached to the peripheral portion thereof, and protrudes at every other circumferential direction among the eight fins F (F ₁ , F ₂ ) of the support member 30 at the peripheral portion of the lens body 40. Four fins F ₁ in different directions contact the lens body surface 41, and the remaining four fins F _{2 contact} the back surface 42 of the lens body 40, and these fins F (F ₁ , F ₂ ) The intraocular lens 2 is configured with the peripheral portion of the lens body 40 sandwiched from both sides. Also,
The lens body 40 includes the upper bar 10 and the lower bar 2 of the jig 1.
0, the outer diameter of which is substantially the same as the horizontal cross-sectional shape.
1 is a spherical surface 13 of the lens holding concave spherical portion 14 of the upper rod 10 (FIG. 1).
(See Reference).

A method of attaching the support member 30 to the lens body 40 using the jig 1 will be described below. First, as shown in FIG. The fins F (F ₁ , F ₂ ) provided in the support member 30 made of a high-molecular elastic material as described above receive repulsive force from the side surface 15 of the upper bar 10, Bend in the direction.

Next, as shown in FIG. 5, the upper bar 10 and the lower bar 20 are connected to each other while the lens body 40 is fitted into the lens holding concave ball portion 14 of the upper bar 10, and the upper end portion of the lower bar 20 is connected. Move to 22. As described above, the lower bar 20 is provided with the stepped portion 21 at the peripheral edge of the upper end. In the stepped portion 21, of the eight fins F (F ₁ , F ₂ ) of the support member 30, Four fins F _{2 in} every other direction are lower rods 2
0, loses the repulsive force from the side surface 23 and returns to the horizontal direction.

Furthermore, subsequent to this state, first, the support member 30 to the point where fins F ₂ which has returned to the horizontal direction as shown in FIG. 6 abuts against the rear surface 42 of the lens body 40
, And then, as shown in FIG.
While maintaining the position at this position, the connection between the upper bar 10 and the lower bar 20 is released, and the remaining fins F ₁ that have lost the repulsive force from the side surface 15 of the upper bar 10 return to the horizontal direction due to their elasticity. In the direction, and as a result, comes into contact with the surface 41 of the lens body 40.

As described above, when the jig 1 of the present embodiment is used, the fins F (F ₁ , F ₂ ) of the support member 30 sandwich the peripheral portion from both sides of the lens body 40.
The intraocular lens 2 in which the support member 30 is inserted into the peripheral portion of the lens body 40 can be assembled accurately and easily.

FIG. 8 shows a work fixture (hereinafter, abbreviated as a fixture) 3 for fixing the jig 1. Reference numeral 50 denotes a disk-shaped base plate, and the center of the upper surface 51 is located in the axial direction. A fitting hole 52 is fitted to fit the lower rod 20 of the jig 1.
Is formed. In addition, around the pusher 53, on the upper surface 51,
Three columns 54 are erected at positions every 120 ° in the circumferential direction. Numerals 60, 60 denote two disk-shaped top plates, at positions corresponding to the columns 54, column insertion holes 61 for inserting the columns 54, and at the center, the upper bar 10 Upper rod insertion holes 62, 62 for insertion are formed. The side plate 6 of the top plate 60
3 is provided with a bolt hole 64 communicating with the pillar insertion hole 61 and forming an internal thread. The top plate 60 is fixed to the pillar 5 by pressing the tip of a bolt B to the pillar.
4, and the use of the fixture 3 enables more accurate insertion work.

[0016]

By using the jig of the present invention, a fin and a pair of arms for fixing the intraocular lens are provided along the peripheral portion of the lens body constituting the intraocular lens along the peripheral portion. The provided supporting member can be accurately and easily attached, the lens body is not displaced from the center in the eye, and the manufacturing is economical. Further, since tweezers are not used, the surface of the lens body is not damaged.

[Brief description of the drawings]

FIG. 1 is a perspective view of a jig for mounting a support member of an intraocular lens according to an embodiment of the present invention.

FIG. 2 is a plan view of a support member mounted on a peripheral portion of the lens body.

3A and 3B are plan views of an intraocular lens in which a supporting member is mounted on a peripheral portion of a lens body, where FIG. 3A is a top view and FIG. 3B is a side view.

FIG. 4 is a perspective view showing a supporting member according to an embodiment of the present invention in which a distal end portion of an upper bar of a jig for mounting a supporting member of an intraocular lens is inserted into a central hole.

FIG. 5 is a partial cross-sectional view of the jig for illustrating a function of a step formed on a lower rod of a jig for mounting a support member of an intraocular lens according to an embodiment of the present invention.

FIG. 6 is a partial cross-sectional view of the jig for illustrating a function of a step formed on a lower bar of a jig for mounting a support member of an intraocular lens according to an embodiment of the present invention.

FIG. 7 is a partial cross-sectional view of the jig for illustrating a function of a step formed on a lower bar of a jig for mounting a support member of an intraocular lens according to an embodiment of the present invention.

FIG. 8 is an exploded perspective view of a working fixture for performing an insertion operation using the jig for inserting and supporting a support member of the intraocular lens according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 jig for mounting support member of intraocular lens 2 intraocular lens 3 work fixture 10 upper bar 20 lower bar 30 support member 40 lens body 50 base plate 60 top plate B bolt F fin M center point W, T width

Claims (1)

(57) [Claims] 1. A supporting member having a fin and a pair of arms for intraocular fixation provided on a peripheral portion of a lens body constituting an intraocular lens used for cataract surgery along the peripheral portion. A jig for mounting, which corresponds to an upper rod having a lens holding concave sphere portion having a smooth spherical surface at a lower end portion, and every other fin of the support member at an upper peripheral portion in the circumferential direction. A jig for mounting a support member for an intraocular lens, comprising a combination of a lower rod having a stepped portion to accommodate these fins in a horizontal direction at a position where the fins are arranged.