CN2343997Y

CN2343997Y - Sucking disk type corneal contact lens for treating myopia

Info

Publication number: CN2343997Y
Application number: CN 98234808
Authority: CN
Inventors: 王平
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-08-05
Filing date: 1998-08-05
Publication date: 1999-10-20
Anticipated expiration: 2008-08-05

Abstract

The utility model relates to a pair of sucking disk type corneal contact lenses for curing myopia, which is a pair of circular hard contact lenses of which the full diameter is between 19.5 to 20.5 mm. The refractive power of each lens is zero, the outer surface of each lens is printed with a dot by transparent paint, and the diameter of each dot is 0.5 mm. The curvature radius of each inner surface corneal part is larger than that of each myopic eye cornea, and a sealed air cavity is formed between the inner surface of each lens and the surface of each eyeball. The air negative pressure in the air cavity makes each lens generate a sucking disk function to eyeballs and the power that each lens presses each cornea, and simultaneously, the air in the air cavity supplies oxygen required by each cornea. Normal work and study can not be influenced by the utility model when worn, and the myopia and astigmia can be safely, simply and conveniently cured.

Description

Sucked type myopia corneal contact lens

This utility model relates to a kind of sucked type myopia corneal contact lens.

The near-sighted eye cover of various treatments, eyeshield, magnet therapeutic apparatus etc. are arranged at present on the market, a multitude of names, but with this utility model technology approaching have five kinds: first kind " contacting mirror myopia device ", this therapeutic apparatus needs to use air extractor owing to want the vacuum suction eyeball, can not carry out normal working and learning when wearing mirror, it is also not too convenient to use, and the structure of mirror body can not guarantee that cornea oxygen supplies with, and can cause corneal injury, wears with also very uncomfortable.Second kind of " eyelid press contacts mirror " myopia device, wear with sense more comfortable, but the pressure that increases the eyeglass corneal just must increase the thickness of eyeglass, this will make contact lens lose breathability, diminish cornea, and because lens edge must be done to such an extent that thinner eyes could adapt to, therefore the increase of lens thickness is limited, this is limited with regard to making contact lens press the pressure of cornea, and eyelid itself is just loose in fact, so not necessarily can both satisfy the required pressure of each eye; Because the mirror body is heavier, so keeping not ideal aspect the relative position between eyeglass and cornea, promptly vertex of surface not necessarily always overlaps with the cornea optic centre in the eyeglass in addition, and this will influence the normal deformation of cornea.The third " vapour-pressure type vision restoration device ", when wearing with this kind therapeutic apparatus, cornea is subjected to greater than 1 atmospheric effect, and anterior corneal surface is out of shape by effects of air pressure, and it is big that radius of curvature becomes, to reach the purpose of treatment myopia.But through experiment showed, that this therapeutic apparatus just can not make corneal distortion to the bigger state of radius of curvature wearing the time spent.The 4th kind " contact lens elastic press type myopia device ", it can regulate the pressure of contact lens corneal, the control eyeglass is pressed the position of cornea, it is to see distant objects that the time spent is worn in treatment, the contact lens center was overlapped with the cornea optic centre, cornea is out of shape towards the stable shape direction, lens design is to adopt lucite or hard gas permeable material, just adopt hard gas permeable material at last, owing to will guarantee eyeglass the cornea compressive strain, eyeglass will be made thicker than the general hard ventilative eyeglass of correcting defects of vision, and wear the time spent eyeglass by its design and be close to cornea, be difficult to guarantee the oxygen supply of cornea, and may cause corneal injury.The 5th kind " soft contact lens elastic press type myopia device " worn with more comfortable though adopt soft lens to make, and eyeglass is perforate also, but still can not guarantee the oxygen supply of cornea well.

The purpose of this utility model is to provide a kind of and is guaranteeing under the prerequisite that cornea oxygen is supplied with, it is too small to press cornea to change the myopia corneal curvature radius with radius of curvature greater than the contact lens,hard of anterior corneal surface radius of curvature, make the anterior corneal surface shape safely towards the inner face direction distortion of contact lens cornea portion, thereby make myopia or astigmatism recover the sucked type myopia corneal contact lens of normal bent light state.

This utility model is achieved in that it is the circular hard corneal contact lens with sucker effect, and full diameter is between 19.5～20.5 millimeters, and the eyeglass refractive power is zero, and it is 0.5 millimeter round dot that the eyeglass outer surface is printed on diameter with transparent pigment.The eyeglass inner face is divided into junction surface, air chamber portion, support portion, warping part, the edge part of interior angle membranous part, cornea portion and air chamber portion; The eyeglass outer surface is divided into outer sclera portion, exterior angle membranous part; Eyeglass inner face interior angle membranous part radius of curvature is greater than the myopia corneal curvature radius, do not contact between 9～17 millimeters scopes of inner face diameter and the eyeball surface and form the occluded air chamber, air in the air chamber contacts with surface, the nearly limbus of corneae of cornea district, air negative pressure makes eyeglass produce the sucker effect to eyeball in the air chamber, produce eyeglass and press the power of cornea, air is supplied with cornea requisite oxygen gas in the air chamber simultaneously.

Below in conjunction with drawings and Examples this utility model is described in detail:

Fig. 1 is the shaft section figure of this utility model;

Fig. 2 is this utility model surface view before;

Fig. 3 wears the mirror operation chart for this utility model.

Embodiment one: adopt the hard contact lens material that does not have breathability, as PMMA (methacrylate), each thickness of eyeglass is between 0.4～0.8 millimeter, and the eyeglass inner face is divided into junction surface (2), air chamber portion (3), support portion (4), warping part (5), the edge part (6) of interior angle membranous part (1), cornea portion and air chamber portion; The eyeglass outer surface is divided into outer sclera portion (7), exterior angle membranous part (8).Interior angle membranous part (1) radius of curvature of this kind contact lens is greater than the myopia corneal curvature radius, its concrete size will be decided according to myope cornea radius of curvature, generally can be made into serial eyeglass selects and wears, the contact condition of cornea and eyeglass when usually the sight glass sheet holds eyeball by a fluorescence, when optimum contacting state is eyeglass pressure cornea, the nearly limbus of corneae of cornea portion does not contact with the eyeglass inner face, and the degree of tightness state that the contact condition of certain cornea and contact lens inner face will be worn mirror influences.After eyeglass holds eyeball, air and tear can slowly enter air chamber, contact lens is reduced gradually to eyeball sucker active force, in this process, air contact area in cornea and the air chamber enlarges gradually, make the nearly center of cornea also obtain oxygen, when the air pressure in air chamber equals external atmosphere pressure, contact lens is kept to zero to the sucker active force of eyeball, have only CC smaller portions area to contact with the contact lens inner face this moment, the size of this area is influenced the size of eyeglass pressure by eyelid, when eyeglass no longer held eyeball, the wearer can feel, and just closed eyes this moment, make eyeglass hold eyeball again with the hand eyelid, the therapeutic apparatus that this operation is seen below is worn with explanation.Air chamber portion (3) accounts for the scope of 9～17 millimeters of optic diameter, interior angle membranous part (1) is pushed down cornea and is reached optimum state when guaranteeing that contact lens holds eyeball, air chamber portion still has air in certain amount in (3), and this inner face of eyeglass does not contact with the nearly limbus of corneae of anterior corneal surface district, supplies with the oxygen that guarantees cornea.The making of eyeglass support portion (4), accomplish that Dai Jing works as eyeglass inner face center and rigidly connects when contacting CC, support portion (4) does not touch sclera, press eyeglass when the contact surface diameter of interior angle membranous part (1) and cornea reaches 4 millimeter, support portion (4) just touches sclera, this moment is because the elasticity of eyeball makes the power of cornea to the oriented sinciput of eyeglass, this power is come balance by eyeglass sucker active force afterwards, after eyeglass holds eyeball by the sucker effect, eyeglass interior angle membranous part (1) just expands near the limbus of corneae district with the cornea contact surface, and Dai Jing reaches optimum state.Eyeglass is established warping part (5), and purpose is in order to alleviate the pressure of eyeglass to sclera, to prevent to weigh wounded sclera.Lens edge portion (6) is slick and sly structure, unlikely scuffing eyeball.

Embodiment two: adopt hard contact lens,gaspermeable material, as fluoro-silicon monomer+MMA+ methacrylic acid, eyeglass inner face and edge part structure all adopt the lens structure of non-breathability hard contact lens material identical with first kind, difference is to guaranteeing that the nearly center of eyeglass has breathability, center of lens thickness is between 0.2～0.5 millimeter, compare the littler of first kind of eyeglass, because material refractive index difference, exterior angle membranous part (8) radius of curvature is also different, and the coverage of outer sclera portion (7) is bigger, more near center of lens.Adopting the center of lens thickness of hard gas permeable material less is for satisfying the breathability in the nearly CC of eyeglass district, guaranteeing that the nearly center of cornea has more oxygen to supply with.

More than the eyeglass of two kinds of structures be circular corneal contact lens, between 19.5～20.5 millimeters of full diameters, the eyeglass refractive power is zero.When putting on eyeglass and carry out myopia,,, can not influence normal working and learning so eyes can be seen distant objects clearly because cornea is depressed into the bigger state of radius of curvature.In order to guarantee to wear the tram that eyeglass is pressed cornea, eyeglass inner face center was overlapped with the eyeball optic centre, take at these two kinds of eyeglass outer surface centers with the dot (9) of 0.5 millimeter of diameter of transparent pigment seal, after eyeglass holds eyeball, allow eyes keep a close watch at a distance a bit, push away eyeglass and slide on eyeball, make dot cover that of being kept a close watch on, at this moment center of lens has just overlapped with the cornea optic centre.

Wearing of this therapeutic apparatus with explanation:

One. put on the operation of contact lens

Because two kinds of optic diameter are all bigger, are again hard contact lenses, to wear mirror or pluck mirror so use the dedicated suction disc type to wear the mirror device, eyeglass is placed on when not wearing in the preservation liquid of eyeglass conserving case, and second kind of hard ventilative eyeglass also will regularly carry out disinfection, clean eyeglass in this way.

＜1 〉, first kind of eyeglass that adopts non-breathability hard contact lens material, after wearing the mirror device and be worn over eyeglass on the cornea with sucked type, this moment, eyeglass can't hold eyeball, need outside eyelid, to push eyeball sclera portion with thumb (13) and middle finger (14), use forefinger (15) roof pressure contact lens (11) outside eyelid (10) simultaneously, allow the interior air of air chamber portion (3) of contact lens (11) discharge from part between the slit of support portion (4) and sclera, this operation is seen shown in (Fig. 3), because the elastic reaction of eyeball (12), after letting go, slit between lens periphery support portion (4) and sclera disappears, produce negative pressure in the air chamber portion (3), eyeglass just can hold eyeball, and cornea also just has been pressed onto the bigger state of radius of curvature by eyeglass interior angle membranous part (1).Dai Jinghou air and tear can progress into air chamber, the air chamber internal gas pressure raises, in this process, air and tear in the air chamber will move closer to the CC district, provide cornea required oxygen, at regular intervals when the air pressure in the air chamber portion (3) equals external atmosphere pressure, eyeball sclera portion will be left in support portion (5), this moment, the glasses wearer can feel, repeat previous operation again again and wear mirror, allow eyeglass hold eyeball, carry out such operation three, four hours of Dai Jing repeatedly.

＜2 〉, second kind of eyeglass that adopts hard contact lens,gaspermeable material, its eyeglass of wearing mirror method and first kind of non-breathability hard contact lens material of employing is basic identical, difference is, because second kind of center of lens thickness is less, after wearing the mirror device and be worn over eyeglass on the cornea with sucked type, when allowing air in the eyeglass air chamber portion (3) partly discharge with thumb (13) and middle finger (14) extruding eyeball sclera portion, for preventing the eyeglass of crushing, forefinger (15) can not the roof pressure center of lens thin part, and answer the bigger outer sclera portion (7) of roof pressure lens thickness, all the other operational approach are identical with first kind of eyeglass all.

Two, see object after putting on eyeglass, see whether the transparent pigment dot of eyeglass outer surface is to be in the optic centre.Allow eyes keep a close watch at a distance a bit, push away eyeglass and on eyeball, slide, make dot cover that of being kept a close watch on, center of lens just can overlap with the cornea optic centre, and will note keeping eyeglass to hold eyeball when the promotion eyeglass.

Three, put on contact lens by day and carry out myopia, wore with three, four hours in general one day, wear at twice, wore the morning one or two hour, wore again afternoon one or two hour, do not influence normal working and learning therebetween, but, had better not when seeing near thing for a long time, wear usefulness in order to reach better therapeutic effect.

Contact lens of the present utility model is made by the producer of special production contact lens, as the working condition permission, should use second kind of eyeglass that adopts hard contact lens,gaspermeable material as far as possible, because its breathability is better, helps guaranteeing the supply of cornea oxygen.

Claims

1. sucked type myopia corneal contact lens is characterized in that: eyeglass is circular hard corneal contact lens, and full diameter is between 19.5～20.5 millimeters, and the eyeglass refractive power is zero, and it is 0.5 millimeter round dot that the eyeglass outer surface is printed on diameter with transparent pigment; The eyeglass inner face is divided into junction surface, air chamber portion, support portion, warping part, the edge part of interior angle membranous part, cornea portion and air chamber portion, and the eyeglass outer surface is divided into outer sclera portion, exterior angle membranous part; Its inner face interior angle membranous part radius of curvature forms the occluded air chamber greater than myopia anterior corneal surface radius of curvature between 9～17 millimeters scopes of eyeglass inner face diameter and the eyeball surface.

2. device according to claim 1 is characterized in that: when eyeglass adopted the hard corneal contact lens material of non-breathability, center of lens thickness was between 0.4～0.8 millimeter; When eyeglass adopted the hard corneal contact lens material of breathability, center of lens thickness was between 0.2～0.5 millimeter, and the nearly center of eyeglass has breathability.