CN1057441C

CN1057441C - Deformable eyes buitin lens

Info

Publication number: CN1057441C
Application number: CN94115687A
Authority: CN
Inventors: 中岛敏之; 菊池敏一
Original assignee: CANONSEI Co Ltd
Current assignee: STAAR Japan Inc
Priority date: 1994-09-09
Filing date: 1994-09-09
Publication date: 2000-10-18
Anticipated expiration: 2014-09-09
Also published as: CN1120176A

Abstract

The present invention relates to a contact lens which can be deformed to insert into the eyeball from a small incision less than 4mm and is provided with a deformable optical part (1) and a plurality of supporting parts (2), wherein the deformable optical part (1) is made of an elastic material and has the thin periphery and the thicker center; different from the deformable optical part (1), the supporting parts (2) are made of a flexible material, each of the supporting parts (2) is provided with a root (2a) with an anchor part (2b), and a fine leading end (2c); the root (2a) is respectively embedded in a reinforcement part which is arranged at the periphery edge of the optical part and is thicker than the periphery edge of the optical part or a part which is away from the reinforcement part and near the center of the lens, to enhance the force for binding the supporting parts and the optical part.

Description

Deformable eyes buitin lens

The present invention relates to a kind of operating on and insert the employed deformable eyes buitin lens of ophthalmic substituting this crystal after the lens extraction of eyeball because of cataract.

During the excising operation of general cataractous eyeglass, the otch that cuts on the eyeball is littler, and it is littler that the probability of disorderly looking takes place in the operation back.

For this reason, developed a kind of so-called ultrasonic crystal emulsifying suction (KPE) of using ultrasound emulsifying suction device.This skill is to utilize above-mentioned ultrasound emulsifying suction device, the crystal of nebulousurineization is smashed and emulsifying after with its extraction.So only can be with lens extraction to the otch of the about 4mm of eyeball incision.This compares with the traditional ECCE (ECCE) that need cut the otch of about 10mm when the extracting lens, and is obviously progressive.

Corresponding to above-mentioned little cutting operation method (cutting young operation), the intraocular lens that existing a kind of at present otch from childhood inserts ophthalmic is developed.Traditional intraocular lens is to have the opticator of being made by hard materials such as glass or plastic cement, and the otch size when therefore transplanting must be greater than the diameter of this opticator.More situation is that the otch size is at 6.5mm or bigger.For this reason, even if according to the KPE otch extracting lens from childhood of performing the operation, when inserting the intraocular lens of hard, also still need otch is cut expansion once again.

In the clear 58-18005 of Japanese Patent Application (spy opens clear 58-146346), disclosed a kind of deformable eyes buitin lens that can insert from the little otch of eyeball.This lens 1 are the opticators 3 that form of the deformably resilient material by the memory characteristic fixed to have and the support part 4 that 3 of this opticators are held in ophthalmic are constituted shown in Fig. 4-6.Support part 4 and opticator 3 to form, base portion 4a is imbedded the peripheral part of opticator 3 and fixed, support part 4 symmetric configurations with the bending of first end and two with different types of pliability material.Opticator 3 is integrally formed than thin annulus 3a by lens 3b and periphery thereof, and these lens 3b increases thickness by the thin part of periphery gradually to the center.

Opticator 3 can be scratched by means of volume, bending, extend and folded etc. make its distortion become less shape, so having the intraocular lens of this opticator can insert in the eyeball from the little otch of about 4mm by using insertion utensil newly developed, make and insert the memory characteristic of back, in eyeball, return to its distortion preceding size and shape according to this opticator 3.Therefore, according to the characteristic and the insertion method of this intraocular lens, now can implement the little otch transplant operation of eyeball.

In order to use above-mentioned intraocular lens and to insert utensil otch insertion from childhood, the object that preferably is inserted into, it is deformable eyes buitin lens, it is better small-sized to heal, and especially needs the central portion thickness of opticator that the easiness to distortion is had the greatest impact to make thinner and need make more small-sized with inserting utensil.

But, above-mentioned known deformable intraocular lens, when thin, the thickness of its periphery certainly will be also thinner along with becoming as for yielding little shape the central portion thickness of its optic being made.Because of supporting that part is to bury the periphery that is fixed in opticator underground,, the anxiety of generation disengagement will be arranged so when this periphery thickness is too thin, just can't stably support opticator.For this reason, press for a kind of improved intraocular lens.

Purpose of the present invention is provides a kind of opticator thin thickness, otch inserts in the eyeball by the insertion utensil from childhood easily, and can be by supporting the deformable eyes buitin lens of the certain part of fixed optics stably of part.

Deformable lens provided by the present invention comprises: one to make periphery by elastomeric material thinner, the deformable opticator that central part is thicker, constitute and bury and fix a base portion by the support part made from the different types of pliability material of this opticator underground at the periphery of this opticator, it is characterized in that the periphery of this opticator or be big reinforcement part, the base portion of above-mentioned support part is embedded in this reinforcement part or than the position of the core of the close slightly lens of this reinforcement part near the thickness that some places of the Zhou Fangxiang of this part form the more above-mentioned periphery of thickness.

Fig. 1 is the plane graph of an embodiment of deformable eyes buitin lens of the present invention;

Fig. 2 is the enlarged perspective of wanting portion of Fig. 1;

Fig. 3 is the amplification front view of wanting portion of Fig. 1;

Fig. 4 is the plane graph of an example of deformable eyes buitin lens in the past;

Fig. 5 is the amplification oblique drawing of wanting portion of Fig. 4; And

Fig. 6 is the amplification front view of wanting portion of Fig. 4;

As follows referring now to the description of drawings first embodiment of the present invention.

Among Fig. 1-3,1 serves as reasons have the opticator that makes of the formed products of deformably resilient material of fixed memory characteristic, the 2 support parts of serving as reasons and making with opticator 1 different types of pliability material.

Above-mentioned opticator 1 is made of the main part 11 and the reinforcement part 12 of planar rondure.This main part 11 has the peripheral part 11a of thinner thickness and is positioned at the lens component 11b of this peripheral part 11a inboard.The table back side of this lens component 11b increases thickness by periphery gradually to the center, and the thickness at its center, and promptly the thickness at the center of main part 11 makes thin than aforesaid traditional opticator.

At two places of the periphery of main part 11, promptly the upper right sidepiece of Fig. 1 and lower-left sidepiece are provided with protuberance respectively and are the leg-of-mutton tabular reinforcement part 12 of approximate right angle, and main part 11 is configured to reach up and down the left-right symmetric shape.In addition as shown in Figures 2 and 3, this reinforcement part 12 stretches from the peripheral part of the outer direction lens component 11b of main part 11, and its thickness evenly and bigger than the thickness of the outer peripheral edge portion 11a of main part.Simultaneously, this reinforcement part 12 as shown in Figure 1, is provided in a subtend zone that is marked off by the diameter D1 and the D2 orthogonal of the main part 11 that stretches about reaching up and down and is external in having of main part 11 and be parallel in the square on each limit of diameter D1, D2.

Support part 2 by broad and thick base portion 2a, be connected with and be connected in the elongated first end parts 2c one of holding outside this base portion 2a in the arcuation anchor portion 2b that holds within this base portion 2a and the inner and constituted.

Support part 2 to have two, respectively with the major part of its base portion 2a and anchor portion 2b from reinforcement part 12 be inserted into lens section 11b periphery and make anchor portion 2b with reinforcement part 12 within fixed support lens component 11b under the side parastate.

Support the first end parts 2c of part 2 to make, simultaneously it is bent to circular-arc symmetric following two subtends on the lens component 11b that are disposed at by the elastomeric material that is out of shape because of external force easily.

Opticator 1 is to be made by arbitrary transparent materials such as urethane elastomer, silicon ketone elastomeric material, aquogel polymer and ossein chemical compounds, and supports that part 2 is to be made by pliability synthetic resin such as polyamide.

The deformable eyes buitin lens that the foregoing description makes, system utilizes the insertion utensil that for example discloses for the flat 3-142067 of Japanese Patent Application number or similarly inserts utensil, its opticator 1 is bent to tubular and inserts in the eyeball to substitute the crystal that picked-off along the diameter D1 of main part 11 or D2 direction, and the memory characteristic that utilizes opticator 1 itself to be had returns to and is bent preceding shape.

The present invention will be because of making the center thickness of opticator of more traditional intraocular lens for thin to the center thickness of the opticator 1 of the tool influence of the easiness of flexural deformation operation, so it can be bent to the tubular littler, thereby can insert in the eyeball from the otch less than 4mm littler than traditional otch than traditional person.

Moreover, though make the center thickness of opticator 1 thinner, the thickness of the ringed perimeter part 11a of main part 11 is also made thinner simultaneously, but because the thickness of its reinforcement part 12 is big than the thickness of peripheral part 11a, and with this reinforcement part 12, extend to perimembranous outside the lens component 11b and reinforcement in addition via this peripheral part 11a to the center position of opticator 1, to support base portion 2a most of of part 2 simultaneously and be formed at the anchor portion 2b that holds within this base portion 2a to be embedded in reinforcement part 12 or this reinforcement part 12 slightly near the position of the core of lens, therefore the constant intensity of supporting between part 2 and the opticator 1 be can promote, the support function of part 2 and the pulling test strength of supporting part 2 supported.

In the above-described embodiments, because two reinforcement partly are outside the giving prominence to of periphery from the main part of optic branch, so can support that also major part and the anchor portion 2b of the base portion 2a of part 2 are embedded in this reinforcement part 12.

Shape, equipping position and the number of stating reinforcement part on the present invention can be optionally suitably selected, and this reinforcement part also can be necessarily be given prominence to by the periphery of the main part of optic branch.

As mentioned above, deformable eyes buitin lens of the present invention comprises: the elastomeric material with memory characteristic is made and its peripheral part is thin, the thicker deformable opticator in center, and base portion lays fixed in the support part that one of above-mentioned opticator is made by other kind of the pliabilities material different with this opticator, and the periphery that it is characterized in that this opticator is provided with several its thickness and is embedded in the part that this reinforcement part or reinforcement partly reach close slightly lens centre side greater than the reinforcement part of this periphery and with the base portion of above-mentioned support sector branchs.

According to this kind structure, even the peripheral thickness of opticator is made thinner, support part also can not reduce to the constant intensity of optic branch, can prevent the attenuating of the support function or the pulling test strength of support sector's branch really.

Thinner because of the peripheral thickness of opticator being made, so all thickness of reinforcement part opticator in addition is also thinner along with making.The intraocular lens of this kind structure is easy to be rolled into less tubular, so can utilize a kind of insertion utensil that opticator can be deformed into little shape is little otch than traditional operation on eyeball with it certainly, promptly insert smoothly in the eyeball that crystal picked-off, make it in eyeball, return to its distortion preceding shape and size according to its memory characteristic less than the otch of 4mm.

Claims

1. deformable eyes buitin lens, comprise: the elastomeric material that has the character of the shape that resiles by deformable and after distortion makes and its peripheral thickness is thinner, the deformable opticator (1) that center thickness is thicker, and make and its base portion lays fixed in one of above-mentioned opticator and supports part (2) to constitute by the pliability material that is different from this opticator, it is characterized in that: the base portion (2a) in above-mentioned support sector (2) forms anchor portion (2b), and several thickness reinforcement part (12) thicker than this peripheral part is set, and at least a portion and this anchor portion (2b) of above-mentioned support base portion (2a) partly laid fixed in this reinforcement part (12) at the peripheral part (11a) of above-mentioned opticator or the Zhou Fangxiang of close this part.

2. the described deformable eyes buitin lens of claim 1 should support wherein that the anchor portion (2b) of part (2) be an arcuation, and this anchor portion is to lay fixed in part than the central side of the close slightly lens in this reinforcement part via reinforcement part (12).