CN1164037A - Rotationally stabilized contact lens and methods of lens stabilization - Google Patents
Rotationally stabilized contact lens and methods of lens stabilization Download PDFInfo
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- CN1164037A CN1164037A CN 96101982 CN96101982A CN1164037A CN 1164037 A CN1164037 A CN 1164037A CN 96101982 CN96101982 CN 96101982 CN 96101982 A CN96101982 A CN 96101982A CN 1164037 A CN1164037 A CN 1164037A
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Abstract
Contact lenses, especially toric and bifocal, which are rotationally stabilized and methods of stabilizing contact lenses. Contact lenses are stabilized, with respect to rotation while in place on the eye, by providing the lenses with a non-circular shape. In a preferred embodiment, a toric contact lens is rotationally stabilized by providing the lens with an oval shape. Also disclosed are methods of providing non-circular lenses with appropriate shapes for proper fit to a patient's eye.
Description
Put it briefly, the present invention relates to glasses, it stablizes when placing around eyes with suitable position with being rotated.More particularly, the present invention relates to the toric contact lens that is used for astigmatism and be used to correct presbyopic multifocal contact lens carry out stable method and design.
Well-known technically, can use glasses, for example contact lenses for correcting defects of vision.Many patients can suitably wear contact lenses, they be basically sphere shape and uniform magnification is arranged, that is to say that they are designed to be applicable to a kind of eyes of the shape of sphere basically.Yet some patient suffers from a kind of disease that is called astigmatism.Astigmatism patient's eyes have irregular shape, that is, its eyes are aspheric surface shapes.The contact lenses that these needs of patients are becomed privileged, i.e. toric lens.
Toric lens generally has a surface of protuberance basically, that is, this eyeglass has two cylindrical curvature, and their axle is orientated basically orthogonally.For astigmatism correctly, toric lens must be positioned the design attitude on the eyes.If this eyeglass has rotation slightly with respect to the design orientation, no matter be clockwise direction or counter clockwise direction, all can make patient's vision impaired significantly.
In addition, some patient also needs a kind of eyeglass that an above magnification is arranged.For example, aging patient needs bifocal lens probably, and it can provide one first magnification in first district that is used to read, and is being used to see that second district of distant objects provides one second magnification.Therefore, under the situation of toric lens and some bifocal lens, the ad-hoc location that eyeglass is remained on the eyes is important.
The prior art that is used for the spin stabilization contact lenses comprises: those are in " contact lenses practical application " the 4th edition, disclosed technology among the Robert Mandell PP.661-2 (1988); Mandell discloses the universal methods of two kinds of stable rotations: prism balancing machine method and make top and lower periphery attenuation.In prism balancing machine method, Mandell says that the thicker position (pedestal) of prism is a certain position because of gravity is moved down into.A kind of like this prism balancing machine eyeglass can alternatively comprise a lower flat intercept.In general, truncate section purpose is maintenance level when eyeglass places on patient's the eyes with the appropriate location, and truncate like this section looks it is that eyeglass top or bottom along locating keeps flat in eyes.Truncate eyeglass produces the rotational stabilization of difference, because the truncate line of eyeglass may move along the top or the bottom at eye face edge.In addition, truncate eyeglass also makes the patient feel under the weather, and this is because the friction between eyeglass and the eyelid has strengthened.
Awarded the U.S. Patent No. 4 that the U.S. Patent No. of Wichterle awarded Fanti on June 20th, 4,874,234 and 1978 on October 17th, 1989,095, disclose the method for some spin stabilization contact lenses in 878, they relate to the peripheral attenuation (that is " bed separation " technology) that makes eyeglass.Wichterle has taught the method for gaining in weight in desirable lens bottom, and gravity can make eyeglass keep correct orientation like this.Fanti then seeks to keep rotational stabilization by the interaction in eyelid and lens thickening district.Yet the lens area of thickening has reduced the perviousness of oxygen, and the perviousness of oxygen is necessary for good corneal health.In addition, when the lens area bending of thickening when adapting to eyes, undesirable optical magnification may take place change that (generalized case is seen M.Remba, " Evaluating the Hy-drasoft Toric ", Contact Lens Forum, PP.45-51, in March, 1987).
Though in order to stablize contact lenses and to have proposed method miscellaneous with correct orientation, but the contact lenses that still need spin stabilization, and the method for stable contact lenses, these methods should overcome the various shortcoming of prior art, and for example stability is not enough, oxygen permeability reduces, optical magnification changes and patient's discomfort increase etc.
One of the present invention purpose is to provide a kind of method that is used for stablizing glasses, and these eyeglasses are need be stable when placing around eyes.
Another object of the present invention is to provide a kind of toric contact lens of spin stabilization.
Another object of the present invention is to provide a kind of many focal lengths contact lenses of spin stabilization.
One of the present invention further purpose is, the eyeglass and the stable method of eyeglass of spin stabilization is provided, and they increase little to the effect that eyeglass inhibition oxygen is penetrated into cornea.
The present invention also has a further purpose, and the eyeglass and the stable method of eyeglass of spin stabilization promptly is provided, and they need not complicated wearing and treatment technology.
One of the present invention attached purpose is to provide the eyeglass and the stable method of eyeglass of spin stabilization, and does not change the magnification of eyeglass.
The present invention also has another purpose, and a kind of method and design of cosily wearing a spin stabilization eyeglass promptly is provided, and this eyeglass has oval rim on planimetric map.
One embodiment of the present of invention are a kind of like this glasses: when it was placed around eyes, the non-circular of eyeglass made it stable rotatably.The size of eyeglass is to select like this: when eyeglass is put on the eyes, wanting to keep on the section face of basic horizontal it longer; And when eyeglass placed on the eyes, it was shorter on the section face of wanting to keep vertical substantially.In a preferred embodiment; the present invention is a kind of oval-shaped substantially toric contact lens that has; that is, it has a major axis of wishing to protect basically level on placing eyes the time, with a minor axis of wishing to keep vertical basically on placing eyes the time.This minor axis is substantially perpendicular to major axis.
Another embodiment of the present invention is a kind of glasses to be stabilized in method on the eyes, and eyeglass does not rotate basically when wearing like this.This method relates to a kind of non-circular glasses that provide such: blinking of wearer's eyelid, add the shape of eyeglass, and can make lens with respect to rotation around the lens center, remain on position basicly stable on the eyes.In a preferred embodiment, this method relates to that toric contact lens is made is oval shape basically, so that rotational stabilization to be provided.
Further embodiment of the present invention is a kind of method that the eyeglass of a non-circular spin stabilization is provided, and wherein this eyeglass is applicable to patient's eyes.This eyeglass has an interior part that is designed to correct patient's vision; With an outer part that is designed to eyeglass on the stabilize eye rotatably.This method comprises provides inner vision correction part, and it has one for being fit to first radius that the eyes position is selected, and this position of eyes is near described inner vision correction part.This method also comprises provides outside rotation steady component, and it has one for being fit to second radius that the eyes position is selected, and this position of eyes is near described outside rotation steady component.
The present invention also has another embodiment, and this is a kind of many focus lenses, and it is non-circular by one, and preferably one is oval periphery edge in planimetric map, comes stable rotatably.Preferred many focus lenses are bifocal lens.In one embodiment, center of lens is all departed from each focal area, so that the optical axis of eyes is all aimed at each center, focal area.
Fig. 1 is the planimetric map of the eyeglass of a spin stabilization, and the periphery that this eyeglass had has been determined an ellipse in planimetric map.
Fig. 2 is the planimetric map of the toric lens of an oval spin stabilization, and its double-curved surface strides across whole lens surface.
Fig. 3 is the planimetric map of the toric lens of an oval spin stabilization, and the center toric zone of this eyeglass has the double-curved surface radius corresponding to elliptical shaft.
Fig. 4 is the planimetric map of the toric lens of an oval spin stabilization, and the center toric zone of this eyeglass has and the not corresponding double-curved surface radius of elliptical shaft.
Fig. 5 is the planimetric map of the oval eyeglass of a spin stabilization, and this eyeglass is placed on patient's the eyes with the position of mistake.
Fig. 6 is the planimetric map of the oval eyeglass of a spin stabilization, and this eyeglass is placed on patient's the eyes with the orientation of hope.
Fig. 7 is a planimetric map that is worn over the circular eyeglass of the prior art on the patient's eye.
Fig. 8 is the sectional drawing of the toric contact lens of an oval spin stabilization.
Fig. 9 is the following view of an eyeglass shown in Figure 8.
Figure 10 is the upper viewing view of the bifocal lens of a spin stabilization.
This spin stabilization technology can be used for contact lenses miscellaneous. Yet, at multiple song In face or many focal lengths (for example bi-focal) contact lenses, need especially spin stabilization. Double-curved surface Eyeglass has more than one radius of curvature at whole eyeglass, in order to correct patient's astigmatism (being the aspheric surface aberration in patient's eye). Therefore, in order to obtain best vision, the double-curved surface mirror Sheet must be properly positioned on patient's the eyes, in order to correct the aberration of specific region. This Sample, toric lens will have a first curvature radius " r at a first direction1", and a second direction that is basically perpendicular to this first direction a second curvature radius " r is arranged2”。
Term " radius of curvature " refers to an equivalent radius of curvature when using here, and it is by one Individually pass through the circle that two end points on the curve and a high point (high point) draw Determine. Like this, for the curve of round the preceding paragraph arc, its equivalent redius is exactly This radius of a circle. Yet, not exclusively be equivalent to the curve of one section circular arc for its all point , equivalent redius is defined as such radius of a circle, the end of this flexible this curve of mistake Straight line between point and one and all end points of this curve is the point of long vertical range apart. Equivalence radius of curvature, or radius of curvature as used herein only, approximate table by curve definitions Face.
For many focal lengths (for example bi-focal) contact lenses, rotational stabilization is equally heavy Want. For an independent object, bifocal lens provides two videos, each video Its distinctive tendency with respect to eyes (vergence) distance is arranged. These with the eye the optical axis not The video of alignment makes the patient feel echo (being diplopia) owing to video intersects. Conventional lenses is put In the time of on eyes, be temporary transient (not at the nose place) location, and at the pupil of eyes with look (following) under the axle (ordinary circumstance is seen P.Erickson and M.Robboy, and is " hydrophilic coaxial two The performance characteristic of focal length contact lenses ", " U.S.'s optometry and physiological optics magazine ", the 62nd volume The 10th phase, PP.702-8 (1985). Like this, in order to suppress or to prevent diplopia, bi-focal mirror Sheet must have an optical zone not identical with the eyeglass geometric center, thereby makes bi-focal optics The optical axis of system and eyes aligns. Therefore, concerning the bifocal lens that suppresses diplopia, revolve It is extremely important turning to stability.
With reference to accompanying drawing, can more easily understand the present invention. Fig. 1 illustrates a spin stabilization The plane of contact lenses, this eyeglass is in plane or top view and has oval edges The shape of edge periphery, and have a length for first axle of " a " and length for " b " the Two axles. In passing through the view of the eyeglass optical axis, this ellipse is to be come by the edge of eyeglass or periphery Determine.
Fig. 2-4 explanation is according to multiple the establishing for double-curved surface spin stabilization eyeglass of the present invention Meter. Fig. 2 illustrates an eyeglass, is double-curved surface on the whole surface of this eyeglass. Although multiple bent The radius r of face1And r2Correspondingly illustrate according to the elliptical edge axle of length for " a " and " b ", But this is not requirement of the present invention.
Fig. 3 illustrates the eyeglass of a spin stabilization, and this eyeglass is only at a center of lens optics There is a double-curved surface surface in the district. Double-curved surface radius and the elliptical edge axle of Fig. 3 correspondingly illustrate. Like this, along the double-curved surface radius of curvature " r of lens surface1" aim at by the definite length of lens edge Axle " a "; And double-curved surface radius of curvature " r2" aim at minor axis " b ", as depicted in figs. 1 and 2. Though Right double-curved surface radius and oval shaft alignement be suitable for those suffer from what is called " off-specification " and The astigmatism (elongating namely or in the vertical direction, perhaps in the horizontal direction elongation) that " conforms with rule " The patient, but so a kind of aligning is not requirement of the present invention.
Fig. 4 has illustrated another embodiment, and wherein the double-curved surface radius does not correspond to elliptical edge Axle. This embodiment is suitable for suffering from the astigmatic patient of what is called " askew " to those and corrects defects of vision, This astigmatism is to have some to elongate the disease in zone on a kind of eyes, and wherein these zones are not right Should be in trunnion axis or the vertical axis (feelings that are parallel to health bilateral symmetry axle at vertical axis of eyes Under the condition). No matter eyes astigmatism axle how, the toric zone of eyeglass all is to be astigmatism Provide, and the oval peripheral lens edge of this innovation can make toric zone on eyes Keep correct orientation, thus astigmatism.
With reference to Fig. 5 and Fig. 6, can understand dynamic rotary invariant feature of the present invention. Fig. 5 shows Go out oval contact lenses 20 that misplace at patient's eye. Show upper eyelid 24 With palpebra inferior 28, they are 22 and 26 place's haptic lenses at the position respectively. Blink unconscious Eye or reflectivity can think that a side of upper eyelid 22 pairs of eyeglasses at the position applies during blinking A downward power, then the opposite side of 26 pairs of eyeglasses has applied one to palpebra inferior at the position The individual power that makes progress. These power rotate counterclockwise eyeglass, and turn back to the basic water of major axis The position that gentle minor axis is substantially vertical (does not have if should be pointed out that the upper eyelid as shown in Figure 6 Whole revolving forces is provided, most revolving force also is provided). Like this, eyeglass is any The rotation misorentation all can make eyeglass be in such position: the patient blinks in this position The time applied some unbalanced power to eyeglass. These unbalanced power cause the eyeglass rotation, Until make eyeglass reset to a certain correct orientation by the power of blinking.
As shown in Figure 6, when eyeglass when eyes orientations is correct, the power on the eyeglass is substantially flat Weighing apparatus. These equilibrant force can prevent that eyeglass from turning to undesirable position. In case there is one Additional power makes eyeglass temporarily rotate to a certain a little position of imbalance, and is for example shown in Figure 5, Then blinking of patient's eyelid can apply some power as shown in Figure 5, thereby automatically readjusts The position of eyeglass.
Be therewith contrast, Fig. 7 has illustrated a kind of basically eyeglass of circle of prior art. During to the eyeglass application of force, these power namely can not suppress can not urge yet during patient's eyelid is blinking Advance the eyeglass rotation. As can be as seen from Figure 7, no matter how to turn to around center of lens Moving orientation, the power that is applied by eyelid 44 and 48, all can be respectively at the position 42 and 46 or The concentrated area is positioned on the eyeglass near these positions. By the concentrated detent force that causes nictation, When eyeglass is rotated dislocation, can not make eyeglass produce any rotation or reorientation. Therefore, Circular eyeglass at above-mentioned prior art applies slight additional force, and eyeglass is rotated To a unaccommodated position, and can not correct this misorentation nictation yet.
As previously mentioned, prior art attempts to provide rotational stabilization, comprises making eyeglass a certain The zone thickening, this thickened area can be in the bottom of eyes. Yet, these prior art thickenings Method also has some problems, comprise patient's discomfort, undesirable magnification change and The reduction of thicker region oxygen permeability. On the contrary, the present invention avoids thickening or cutting eyeglass, from And avoided the problem relevant with these methods.
Like this, one embodiment of the present of invention are contact lenses of a kind of spin stabilization, this eyeglass has a kind of by the determined non-circular shape of the lens edge in planimetric map or the top view, wherein this eyeglass has a first size in its first xsect, and one second size is arranged in its second xsect.First xsect is substantially perpendicular to second xsect, these two xsects all perpendicular to one by the determined plane of periphery edge in the planimetric map.First size is longer than second size, thereby keeps spin stabilization when making eyeglass on placing patient's eye basically.Eyeglass keeps such position on placing eyes the time, promptly has the xsect of longer first size to keep level basically, has the xsect of short second size then to keep basically vertically.
Can from the shape of all kinds that aforesaid length and short size cross section are arranged, select the peripheral shape (being determined) of eyeglass by lens edge.For example, can to have be the rectangle or the ellipse of rectangular shape band fillet to eyeglass substantially.Preferred lens shape is oval.In addition, lens edge being placed in the plane is not a requirement of the present invention.The elliptical shape at edge is definite by a view (planimetric map or top view) of overlooking this eyeglass, that is, and and by the optical axis of eyeglass.
The contact lenses of preferred elliptical shape of the present invention and spin stabilization have the periphery edge of a definite elliptical shape (from planimetric map), it has a major axis on a first direction, and on the second direction perpendicular to this first direction a minor axis is arranged substantially at one.The size preferably about 14 of major axis " a " is to about 20 millimeters, and preferably about 13 to 15 millimeters of the size of minor axis " b ".Preferablely be, major axis " a " is about 16 to about 18 millimeters, and minor axis " b " is about 13.5 to about 14.5 millimeters.
The radius-of-curvature of toric lens depends on the feature of patient's eye.The design of toric contact lens is described in the following data more fully: " contact lenses practical application ", the 4th edition, Robert Mandell, PP.659-680 (1988); " contact lenses handbook, A.Gasson and J.Morris, PP.196-207 (1992); " contact lenses clinical practice ", revised edition, E.Bennett and B.Weissman, PP.1-12 (1993), it is for reference to incorporate these several pieces of data into own forces at this.
Spin stabilization contact lenses of the present invention can be made by multiple technologies, and for example bilateral becomes mould technology, conventional mechanical turning technology or excimer laser ablation turning technology.The contact lenses of oval spin stabilization preferably become the mould technology to make by bilateral, become the mould technology because complicated more elliptical shape is suitable for some more.
In a preferred embodiment, the toric lens of this spin stabilization is spherical vision correction position, inside at one substantially, and a radius-of-curvature r is arranged
iAnd in the outer portion of a spin stabilization, for example have the perimeter of determining best elliptical shape edge, a second curvature radius r is arranged at one
oFor the eyeglass of oval spin stabilization correctly being worn on patient's the eyes, can required different radius-of-curvature.For example, in some cases, the inner radial r of curvature
iCan be too little, thus eyeglass is applied to excessive pressure on the eyes.This excessive pressure may cause the ocular tissue of eyeglass distortion or indentation ocular tissue, especially lens periphery.In other cases, the inner curvature radius can be too big, and therefore, if this inner radial expands to lens edge equably from eyeglass central authorities, then eyeglass can be worn the middle body of eyes rightly, but can make the crooked or protuberance of eyes in the edge of eyeglass.
Like this, in Fig. 8 and preferred embodiment shown in Figure 9, the toric lens 50 of ellipticity spin stabilization has one first inner curvature radius r at the vision correction position 52 of inside
i Vision correction position 52 generally is the shape of sphere substantially, and is centralized positioning, and comprises a double-curved surface surface 54.This preferred eyeglass has one second outside radius-of-curvature r
o, it is different from first inner radial, and is arranged in the perimeter 56 of spin stabilization, and this zone expands to peripheral lens edge 60 from peripheral 58 vision correction position, inside 52.Periphery lens edge 60 has been determined elliptical shape 62, and this shape provides rotational stabilization to eyeglass 50.Fig. 8 and Fig. 9 have illustrated the whole lens edge with preferred elliptical shape, and it is the minor axis of " b ", wherein a＞b that this ellipse has major axis and the length that length is " a ".
Can be defined as a zone that expands to its periphery from eyeglass central authorities with sphere to a preferred inner vision correction area.In planimetric map, the diameter of its inner vision correction area can change to 15mm from about 11.This diameter is represented with " D " in Fig. 8.Preferablely be that the diameter of inner radial corrected zone is 12 to 14.5mm.
Correctly wear the character shape that depends on patient's eye in the size of the inner radial of a certain particular patient situation and outer radius significantly.Yet the radius-of-curvature r of interior zone in general,
iCan change to about 10mm from about 7mm, and the radius-of-curvature r of perimeter
oCan change to about 13mm from about 8mm.Preferablely be, inner radial between 7.5 and 9.5mm between, and outer radius between 9 and 11mm between.
Also have another embodiment, wherein, a kind of many focus lenses stablize rotatably, as mentioned above by a kind of non-circular periphery edge is provided to eyeglass.As shown in figure 10, a bifocal lens 80 comprises an inner vision correction part 86, and its diameter is 11 to 15mm, and the radius-of-curvature of its baseline is 7 to 10mm.Eyeglass 80 also comprises an outside rotation steady component 88, and this part vision correction part 86 internally expands to elliptical edge 90.First and second vision correction area 82 and 84 is arranged within inner vision correction part 86.First vision correction area 82 is preferably in 7 to 9mm diameter and 7 to 9.5mm baseline radius-of-curvature in the planimetric map.Second vision correction area 84 preferably has 2 to 4mm diameter and such baseline radius-of-curvature in planimetric map: it and first vision correction area 82 differ 1 to 3.5 diopter.
As discussed above, for fear of diplopia or make diplopia reduce to minimum, bifocal lens should be designed so that focus optical system aims at the optical axis of eyes.Therefore, first and second vision correction area 82 and 84 preferably depart from the center of eyeglass, thereby the center that makes these vision correction area is substantially corresponding to the center of patient's optical axis.In order to realize this aligning, vision correction area 82 and 84 center are preferably to the nasal side of short elliptical edge axle 94 (promptly, to the right side of left eyeglass lens, or the left side of lens to the right) skew 1 is to 2mm, and to the skew 0.5 of the top of long elliptical edge axle 92 to 2mm.Yet the vertical shift at vision correction area center is promptly can be above long elliptical edge axle 92, again can be thereunder, this depends on the special characteristic of patient's eye.
Foregoing disclosure makes ordinary person in the art can implement the present invention.In order to make the reader can understand some certain embodiments and advantage thereof better, suggestion is with reference to the following examples.
Example I
Make an oval contact lenses, its lens periphery edge determined one have about 14.5 millimeters major axis and about 13 millimeters minor axis ellipse.This eyeglass adopts one 8.9 millimeters baseline radius-of-curvature to make again on whole lens surface.
This lens produce a kind of minor axis level that do not expect, not ambiguous needs and cooperate, thereby cause " edge displacement (stand-off) ", and this is that a kind of lens edge does not keep close state of contact with eyes.This result shows that correct cooperation may need to provide a radius-of-curvature r in inner vision correction part to eyeglass
iWith the second curvature radius r of spin stabilization part externally
o
Example I
Make the eyeglass of an oval-shaped spin stabilization, its back side (baseline) is real double-curved surface surface.The radius along a cylindrical axes on double-curved surface surface is 8.74mm, and is 9.42mm along the radius of another cylindrical axes.
An advantage of this design is, the complicacy that can reduce to make, because whole surface is a double-curved surface, rather than only at middle section.Yet this design also has shortcoming, because the magnification of cylinder all changes with the variation of double-curved surface radius with the property worn.Like this,, an additional double-curved surface surface be may on the preceding curve of eyeglass, provide, thereby complicacy and the cost made increased in order to provide correct vision correction to many patients.
Example II
Make an oval contact lenses, its lens periphery edge determined one have about 15.8 millimeters major axis and about 13.8 millimeters minor axises ellipse.Portion's vision correction part provides the radius-of-curvature equivalent redius of 13.8mm diameter place (that is) of 8.74mm to eyeglass within it.Also externally spin stabilization part provides the radius equivalent redius of 15.8mm diameter place (that is) of 9.42mm to eyeglass.
The vision correction part is finished with following method with the equivalent radius-of-curvature of spin stabilization: at the actual curvature radius that 8.45mm is provided to 11mm diameter (in planimetric map) from center of lens; At the actual curvature radius that 8.80mm is provided from the 11mm diameter to the 13.5mm diameter; And at the actual curvature radius that 11mm is provided from the 13.5mm diameter expansion to lens edge.
Major axis and minor axis are all worn on eyes, do not produce significant eyes distortion or eyeglass " edge displacement ".
EXAMPLE IV
The contact lenses of ellipse and spin stabilization are described and make by example II, but a double-curved surface surface is added on the baseline of eyeglass.This double-curved surface makes that a cylinder diopter is arranged between the major axis of elliptical edge and the minor axis is 1.00 difference.In planimetric map, the radius in double-curved surface zone is aimed at the main shaft and the secondary axes of elliptical edge, comprises along about 9mm of main shaft with along about 8mm of secondary axes.
EXAMPLE V
Oval-shaped bi-focal contact lenses use the spin stabilization structure of example II by in the example II description of spin stabilization characteristic being produced, and a bi-focal optical zone is added on the baseline of lens.The first vision correction district (in planimetric map) of a 8.0mm diameter provides one-3.0 diopter.The second vision correction district of a 2.3mm diameter provides the diopter in ratio first district big 2.0.The center in vision correction district is offset center of lens 1.4mm towards the nasal side of the elliptical edge secondary axes of eyeglass; And be positioned at the elliptical edge main shaft top 1.0mm of eyeglass.
With reference to these preferred embodiments in detail the present invention has been described in detail,, and needn't have gone to test undeservedly so that the reader can put into practice the present invention.Yet this professional those of ordinary skill recognizes that easily many parts and parameter be change or improvement to a certain extent, and does not depart from the scope of the present invention and spirit.In addition, provide title, exercise question or similar expression to be intended to promote the understanding of reader, should not regard limitation of the scope of the invention as presents.Therefore, intellecture property of the present invention is only determined by following claim and any reasonably extending thereof.
Claims (18)
1. the contact lenses of a spin stabilization have a kind of non-circular periphery edge shape, and wherein lens periphery has a first size in one first xsect of eyeglass, and have one second size in one second xsect of eyeglass,
Wherein, described first and second xsect all is positioned within some planes parallel with the direction of visual lines cardinal principle of passing through described eyeglass,
Wherein, described first xsect is substantially perpendicular to described second xsect,
And wherein, described first size is longer than described second size,
Like this, when eyeglass was worn on the patient's eye, described non-circular edge shape made described eyeglass keep spin stabilization substantially, and has described cross section maintenance level substantially when eyeglass is worn on the eyes of described longer first size.
2. the contact lenses of spin stabilization according to claim 1, wherein said lens edge periphery look from top view, oval in shape substantially, and it has a major axis in described first cross section, and in described second cross section minor axis is arranged.
3. the contact lenses of spin stabilization according to claim 2, wherein said major axis is 14 to 20 millimeters, and described minor axis is 13 to 15 millimeters.
4. the contact lenses of spin stabilization according to claim 3, wherein said major axis is 16 to 18 millimeters, and described minor axis is 13.5 to 14.5 millimeters.
5. the contact lenses of spin stabilization according to claim 1, wherein said eyeglass is a toric lens.
6. the contact lenses of spin stabilization according to claim 1, also comprise an inside vision correction part that a first curvature radius is arranged, with an outside rotation steady component that a second curvature radius is arranged, wherein said outside rotation steady component partly expands to the edge of described eyeglass from described inner vision correction, and wherein said first radius is different from described second radius.
7. the eyeglass of spin stabilization according to claim 6, wherein said first radius is less than described second radius.
8. the eyeglass of spin stabilization according to claim 7, wherein said first radius is greater than described second radius.
9. the eyeglass of spin stabilization according to claim 7, wherein said first radius, in described inner vision correction part between 7mm and 15mm; And described second radius, at described outside rotation steady component between 8mm and 13mm.
10. the eyeglass of spin stabilization according to claim 9, wherein said first radius are between 7.5mm and 9.5mm, and described second radius is between 9mm and 11mm.
11. the eyeglass of spin stabilization according to claim 4 also comprises:
Double-curved surface surface and
The inside vision correction part that a first curvature radius between 7.5mm and 9.5mm is arranged, and the outside rotation steady component that a second curvature radius between 9mm and 11mm is arranged, wherein said outside rotation steady component partly expands to the edge of described eyeglass from described inner vision correction.
12. the eyeglass of spin stabilization according to claim 1, it is a focus lenses more than, has a plurality of vision correction area.
13. the eyeglass of spin stabilization according to claim 12, it is a bifocal lens, has the first vision correction district and second a vision correction part that is positioned at the described first vision correction district that is positioned at central authorities substantially.
14. the contact lenses of spin stabilization according to claim 12, the center in wherein said a plurality of vision corrections district all is aligned with each other substantially, and departs from the center of described lens.
15. the contact lenses of spin stabilization according to claim 14 when the center in wherein said vision correction district is positioned on the described eyes at described eyeglass, flatly leave the center 1-2mm of described eyeglass.
16. the contact lenses of spin stabilization according to claim 14 when the center in wherein said vision correction district is positioned on the described eyes at described eyeglass, vertically leave the center 1-2mm of described eyeglass.
17. method of rotational stabilization being given contact lenses, comprise and give an eyeglass non-circular perimeter edge edge shape in planimetric map, wherein lens periphery has a first size in one first xsect of eyeglass, with in one second xsect of eyeglass, have one second size
Wherein, described first xsect all is positioned at those and the parallel substantially plane of direction of visual lines of passing through described eyeglass with second xsect,
Wherein, described first xsect is substantially perpendicular to described second xsect,
And wherein, described first size is longer than described second size,
Therefore, when eyeglass was worn on the patient's eye, described non-circular edge shape made described eyeglass can keep spin stabilization substantially, and has the described cross section of described longer first size, maintenance level substantially when eyeglass is worn on the eyes.
18. method that non-circular eyeglass is provided, this eyeglass is suitably worn on patient's eyes, described eyeglass has an interior part that is intended to correct patient's vision and one to be intended to the outer part of eyeglass spin stabilization on eyes, and described method comprises the following steps:
(a) partly provide one for correct first radius of selecting in the part of eyes of wearing for described inner vision correction, this part of eyes is used near described inner vision correction part; With
(b) provide one for correct second radius of selecting in the part of eyes of wearing for described outside rotation steady component, this part of eyes is used near described outside rotation steady component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96101982 CN1164037A (en) | 1995-03-15 | 1996-03-14 | Rotationally stabilized contact lens and methods of lens stabilization |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96101982 CN1164037A (en) | 1995-03-15 | 1996-03-14 | Rotationally stabilized contact lens and methods of lens stabilization |
| US404785 | 2003-04-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1164037A true CN1164037A (en) | 1997-11-05 |
Family
ID=5117350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96101982 Pending CN1164037A (en) | 1995-03-15 | 1996-03-14 | Rotationally stabilized contact lens and methods of lens stabilization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1164037A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7819523B2 (en) | 2005-06-03 | 2010-10-26 | Hoya Healthcare Corporation | Ocular lens |
| CN101950089A (en) * | 2010-06-24 | 2011-01-19 | 陈迪生 | Novel rigid gas permeable cornea contact lens |
| CN103959139A (en) * | 2011-09-27 | 2014-07-30 | 庄臣及庄臣视力保护公司 | Method for designing non-round soft contact lenses |
| CN114127620A (en) * | 2019-05-14 | 2022-03-01 | 强生视力健公司 | Soft contact lenses with new stabilization zones for improved angular stability and comfort |
-
1996
- 1996-03-14 CN CN 96101982 patent/CN1164037A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7819523B2 (en) | 2005-06-03 | 2010-10-26 | Hoya Healthcare Corporation | Ocular lens |
| CN101950089A (en) * | 2010-06-24 | 2011-01-19 | 陈迪生 | Novel rigid gas permeable cornea contact lens |
| WO2011160426A1 (en) * | 2010-06-24 | 2011-12-29 | Lin Yan | Rigid gas-permeable cornea contact lens |
| CN101950089B (en) * | 2010-06-24 | 2012-06-27 | 北京京德嘉润贸易有限公司 | Novel rigid gas permeable cornea contact lens |
| CN103959139A (en) * | 2011-09-27 | 2014-07-30 | 庄臣及庄臣视力保护公司 | Method for designing non-round soft contact lenses |
| CN103959139B (en) * | 2011-09-27 | 2016-02-03 | 庄臣及庄臣视力保护公司 | For designing the method for non-circular Soft contact eyeglass |
| CN114127620A (en) * | 2019-05-14 | 2022-03-01 | 强生视力健公司 | Soft contact lenses with new stabilization zones for improved angular stability and comfort |
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