CN104094164A - Optical lens for slowing myopia progression - Google Patents

Optical lens for slowing myopia progression Download PDF

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Publication number
CN104094164A
CN104094164A CN201280042852.6A CN201280042852A CN104094164A CN 104094164 A CN104094164 A CN 104094164A CN 201280042852 A CN201280042852 A CN 201280042852A CN 104094164 A CN104094164 A CN 104094164A
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CN
China
Prior art keywords
region
mirror slip
refractive power
optical mirror
optical
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Granted
Application number
CN201280042852.6A
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Chinese (zh)
Other versions
CN104094164B (en
Inventor
苏祥美
林小燕
杜嗣河
谢欣然
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Hong Kong Polytechnic University HKPU
National University of Singapore
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Hong Kong Polytechnic University HKPU
National University of Singapore
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Publication of CN104094164A publication Critical patent/CN104094164A/en
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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04—Contact lenses for the eyes
    • G02C7/041—Contact lenses for the eyes bifocal; multifocal
    • G02C7/042—Simultaneous type
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04—Contact lenses for the eyes
    • G02C7/041—Contact lenses for the eyes bifocal; multifocal
    • G02C7/044—Annular configuration, e.g. pupil tuned
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/24—Myopia progression prevention

Abstract

An optical lens for a human eye is disclosed herein. In a described embodiment, the optical lens is in the form of a contact lens 100 which comprises a plurality of alternating optic zones 102 arranged between a centre 104 and a periphery 106 of the contact lens 100. The alternating optic zones 102 include a plurality of annular vision correction regions CZ1CZ5 having first refractive powers for correcting myopic refractive errors to create a focused retina image. The first refractive powers are more hyperopic at the lens' periphery 106 than at the lens' centre 104. The optic zones 102 further includes a plurality of annular vision defocus regions DZ1DZ5 having second refractive powers for creating a defocused retina image, wherein the plurality of annular vision defocus regions (DZ1DZ5) are arranged to alternate with respective ones of the plurality of annular vision correction regions (CZ1CZ5). With such a configuration, the contact lens 100 is useful for slowing myopia progression.

Description

For slowing down the optical mirror slip of myopia development
Technical field
The present invention relates to for slowing down the optical mirror slip of myopia development, particularly but be not limited to contact lenses.
Background technology
In the U.S., the financial cost of myopia is annual 2.5 hundred million dollars according to estimates.The adult with high myopia may have the ocular complications of blinding, for example retinal hole (retinal tear) and macular degeneration.The highest in the middle of the adult of the prevalence rate of myopia in Asian Cities, urban, comprise Singapore's (38.7%), the Er U.S. lower (22.7%).In the Singaporean children of 7 years old, rate of myopia is 27.8%.It is very important illustrating the intervention measure that can effectively reduce myopia development.
Optics is got involved measure, and for example multifocal spectacles and contact lenses (CL), not yet obtain confirmation and can slow down myopia development.Only have atropine (atropine) and pirenzepine (pirenzipine) can effectively delay to deepen, but its possible long-term side-effects make to have got rid of the recommendation to ordinary populace.
In Singapore, have and be similar to 220,000 children with myopias between 5 to 16 years old.Children with myopia all over the world can be worn these contact lenses until be grown up and benefit from this intervention measure.In Young Adults due to Singapore, have 83% to be near-sighted, this problem more and more receives publicity.
Object of the present invention is for a kind of optical mirror slip is provided, and this optical mirror slip solves the shortcoming of prior art and/or provides a useful selection to masses.
Summary of the invention
In the first scheme, a kind of optical mirror slip for human eye is provided, this optical mirror slip comprises a plurality of alternating optical region, the plurality of alternating optical region is arranged between the center and periphery of this optical mirror slip, this alternating optical region comprises (i) a plurality of annular vision correctings region, and it has for ametropic the first refractive power of myopia correction, to produce focusing retinal images, compared to the first refractive power at this center of lens place, the first refractive power in the periphery of this eyeglass is compared with long sight; And (ii) a plurality of annular vision out-focus region, it has for generation of the second refractive power that defocuses retinal images, the plurality of annular vision out-focus region be arranged as with each region in the plurality of annular vision correcting region alternately.
By this configuration, applicant has found that this layout is comparatively effective for slowing down myopia development, particularly for children.
Preferably, it is a plurality of right that each region of the plurality of annular vision correcting region and the plurality of annular vision out-focus region is grouped into, and in order to the centering identical, obtains first and second corresponding refractive power.So, can obtain the first refractive power based on following formula:
( X + 2 ( i - 1 ) n - 1 D ) ,
Wherein:
X is the ametropia of human eye;
N is described right number; And
I is the right numbering of annular vision correcting region such as described grade and annular vision out-focus region.
Can obtain described the second refractive power based on following formula:
( X + 2 ( i - 1 ) n - 1 D ) + 2.5 D ,
Wherein:
X is the ametropia of human eye;
N is described right number; And
I is the right numbering of annular vision correcting region such as described grade and annular vision out-focus region.
Preferably, described optical mirror slip further comprises four or more than the alternating optical region of four.More preferably, described in it, optical mirror slip comprises even number alternating optical region, for example 4,6,8,10,12 regions.Alternatively, there are ten alternating optical regions.
Described the first refractive power can comprise for each the power values of variation in described a plurality of vision correctings region.Described the second refractive power can comprise for each the power values of variation in myopic defocus region.
Can recognize that described optical mirror slip can be the form of contact lenses, or can be used as the eyeglass of glasses.
Accompanying drawing explanation
Referring now to accompanying drawing, embodiments of the invention are described, wherein:
Fig. 1 is for ametropia in order to the myopia of rectification-3.00D according to an embodiment of the invention and have contact lenses of ten optical regions;
Fig. 2 illustrates the contact lenses of Fig. 1 for the schematic diagram of bathomorphic effect;
It is ametropia and have contact lenses of ten optical regions that Fig. 3 illustrates myopia in order to rectification-2D, as the modification of the contact lenses of Fig. 1;
It is ametropia and have contact lenses of ten optical regions that Fig. 4 illustrates myopia in order to rectification-4D, as the modification of the contact lenses of Fig. 1;
It is ametropia and have contact lenses of eight optical regions that Fig. 5 illustrates myopia in order to rectification-3D, as the modification of the contact lenses of Fig. 1; And
It is ametropia and have contact lenses of six optical regions that Fig. 6 illustrates myopia in order to rectification-3D, as the modification of the contact lenses of Fig. 1.
Embodiment
Fig. 1 illustrates the optical mirror slip 100 with contact lenses (CL) form according to the embodiment of the present invention.Contact lenses 100 be preferably day throw soft, its there is the periphery long sight of increase and the myopic defocus region that replaces to reduce or retarding myopia is deepened.
Contact lenses 100 comprise a plurality of optical regions that replace 102, ametropia in order to the myopia of rectification-3.00 diopters (D), and in this embodiment, have ten optical regions 102.Ten optical regions 102 start from contact lenses 100 center 104 until the periphery 106 of contact lenses 100, and in each vicissitudinous refractive power of optical region 102 place's tool (refractive power) or light intensity (optical power), the refractive power of this variation or light intensity at center 104 to distributing as follows between periphery 106: X, X+2.5D, (X+0.5D), (X+0.5D)+2.5D, (X+1.0D), (X+1.0D)+2.5D, (X+1.5D), (X+1.5D)+2.5D, (X+2.0D) and (X+2.0D)+2.5D.In the example of-3.00 diopters (D), the refractive power from the center to periphery of ten optical regions 102 is-3.0D ,-0.5D ,-2.5D, 0D ,-2D ,+0.5D ,-1.5D ,+1D ,-1D and+1.5D.In this embodiment, optical region 102 is for participating in covering wide annular or the concentric ring of pupil region.
Optical region 102 alternately comprises a plurality of annular vision correctings region (or referred to as " clear area " (CZ)) and a plurality of annular vision out-focus region (or referred to as " out-focus region " (DZ)), and this clear area (CZ) is in order to produce the image focusing at retina place.In Fig. 1, there are five clear area CZ(CZ 1, CZ 2, CZ 3, CZ 4and CZ 5) and five out-focus region DZ(DZ 1, DZ 2, DZ 3, DZ 4and DZ 5) for arranging.
Known, the clear area of Fig. 1 (CZ) comprises that power values is in order to compensate periphery hyperopic defocus, if clear area CZ do not correct exactly that periphery exists compared with ametropia this periphery hyperopic defocus that just may occur of long sight.In particular, as shown in fig. 1, the power values of clear area (CZ) is (X+0.5D), (X+1.0D), (X+1.5D) and (X+2.0D), generation-2.5D ,-2.0D ,-1.5D and-value of 1.0D.In other words, compared to approaching or at the refractive power of the center of eyeglass, the refractive power at periphery 106 places of contact lenses 100 be compared with long sight, in order at retina place generation focusedimage.
On the other hand, out-focus region (DZ) has the refractive power that the generation of being arranged as defocuses retinal images, and in this embodiment, out-focus region (DZ) has following refractive power: x+2.5D, (x+0.5D)+2.5D, (x+1.0D)+2.5D, (x+1.5D)+2.5D and (x+2.0D)+2.5D, with produce-0.5D, 0D ,+0.5D ,+1D and+value of 1.5D.
Fig. 2 illustrates contact lenses 100 for the schematic diagram of the effect of myopia 200.Because the refractive power compared at 104 places, contact lenses 100 center, refractive power at periphery 106 places are compared with the refractive power of long sight or larger this variation, through clear area CZ, enter the light beam 202 of contact lenses 100 at the focal point F P(CZ of clear area CZ) locate to focus on retina 206, to produce focusedimage FP(CZ).Meanwhile, due to the refractive power of out-focus region DZ, through out-focus region DZ, enter the light beam 204 of contact lenses 100 at the focal point F P(DZ of out-focus region DZ) locate to focus on the place ahead of retina 206.
Visible, contact lenses 100 myopia corrections also compensate periphery hyperopic defocus simultaneously, and therefore contact lenses 100 locate with 106 liang of peripheries the retinal images that provides bright and sharp at the center 104 of contact lenses.
Contact lenses 100 have the many annular regions that are configured to difference in functionality, more effectively to improve or to resist myopia, particularly for children.These contact lenses have also slowed down myopia development.
Imagination can extend to the structure of contact lenses 100 optical region 102 of any number and/or different ametropia for compensating.This can realize by clear area (CZ) and out-focus region (DZ) are grouped into paired region.For arbitrarily, " n " to region (n >=2), in periphery, the clear area CZ of long sight comparatively be can be summarized as to (104 to periphery 106 from center) with the power profile at out-focus region DZ corresponding to identical centering:
Clear area: ( X + 2 ( i - 1 ) n - 1 D ) - - - ( 1 ) ; And
Out-focus region: ( X + 2 ( i - 1 ) n - 1 D ) + 2.5 D - - - ( 2 ) ;
Wherein:
X=is ametropia;
The right numbering in region described in i=.
In the embodiment of Fig. 1 and Fig. 2, will be understood that clear area CZ and out-focus region DZ have been grouped into according to its subscript right:
The 1st pair: (CZ 1, DZ 1); The 2nd pair: (CZ 2, DZ 2); The 3rd pair: (CZ 3, DZ 3); The 4th pair: (CZ 4, DZ 4); And the 5th pair: (CZ 5, DZ 5).
According to formula (1) and formula (2), take the 3rd pair be example, the numbering i=3 that this is right, right number n=5, and in order to the x of correction of refractive errors be-3D CZ 3, DZ 3corresponding refractive power be:
CZ 3=-2D
DZ 3=+0.5D; It is the value shown in Fig. 1.
According to formula (1) and (2), being shown in following form 1 in order to compensate the power profile of different ametropia (2D ,-3D ,-4D and-5D) of the contact lenses in 10 regions:
Table 1
For all refractive powers, should understand compared to (that is, the clear area CZ in center 1) refractive power, (that is, the clear area CZ in periphery 5) refractive power be compared with long sight.
Fig. 3 illustrates for the ametropic contact lenses 300 of compensate-2D and this contact lenses 300 to be had for the power profile shown in the table 1 in ten alternating optical regions 302.Fig. 4 illustrates for the ametropic contact lenses 400 of compensate-4D and this contact lenses 400 to be had for the power profile shown in the table 1 in ten alternating optical regions 402.
Similarly, according to formula (1) and (2), the embodiment of same imaginary picture of primitive people 1 may extend to zones of different.Table 2 represents to reach the refractive power compared with hyperopia result in order to the periphery at contact lenses, and these contact lenses have 8,6 and 4 optical regions, ametropia in order to rectification-3D:
Table 2
Fig. 5 illustrates in order to the ametropia of compensation-3D and has eight alternating optical region 502(, n=4 to) contact lenses 500.According to eight optical regions 502 of table 2 structure so that the refractive power in the periphery of contact lenses 500 is compared with long sight.Fig. 6 illustrates in order to the ametropia of compensation-3D and has six alternating optical region 602(, n=3 to) contact lenses 600.According to six optical regions 602 of table 2 structure so that the refractive power in the periphery of contact lenses 600 is compared with long sight.
Described embodiment is not interpreted as restrictive.In described embodiment, proposed to use the soft eyeglass of the periphery long sight with myopic defocus and increase.Yet, also can imagine the eyeglass of other type, for example rigid eyeglass.Can change shape and the size of contact lenses, and similarly, for myopia in various degree, contact lenses can be suitable for slowing down myopia.For example, this eyeglass can have the curvature of 8mm, 8.3mm and 8.6mm and the diameter of 13.5mm, 13.8mm or 14mm.The center thickness of the refractive power of-3.00D is 0.12mm.For each additional refractive power, can use mold base to develop a pair of insert.
Illustrated in/width of the optical region 102 described is equidistant, but also can be really not so, and the therefore variable-width of optical region 102.
In addition, although described embodiment is used contact lenses as an example, should understand the optical mirror slip that this embodiment can be suitable for other type, for example, for the optical mirror slip of glasses (spectacles/glasses).Although described embodiment can be used in glasses, is not preferably for glasses.This is because stare with change the inevitable eye movement that fixation is associated, and this is stared fixation and changes aiming between glasses and eye position.On the other hand, contact lenses are for fixing and centered by pupil, and therefore contact lenses move along with the motion of eyes, and this can overcome the mankind particularly children's the fixation continuously changing stare.
In described embodiment, contact lenses have many annular domain (>=4), and it is designed for difference in functionality, more effectively to treat myopia and therefore should understand and can construct contact lenses 100 to have the region of arbitrary number according to application.
The present invention has been carried out to comprehensive description, obvious to those skilled in the art, in the situation that not departing from desired interest field, can do multiple modification for the present invention.

Claims (10)

1. for an optical mirror slip for human eye, this optical mirror slip comprises a plurality of alternating optical region, and the plurality of alternating optical region is arranged between the center and periphery of described optical mirror slip, and described alternating optical region comprises
(i) a plurality of annular vision correctings region, it has for ametropic the first refractive power of myopia correction, and to produce focusing retinal images, compared to the first refractive power of the center at eyeglass, the first refractive power in the periphery of eyeglass is compared with long sight; And
(ii) a plurality of annular vision out-focus region, it has for generation of the second refractive power that defocuses retinal images, described a plurality of annular vision out-focus region be arranged as with each region in described a plurality of annular vision correctings region alternately.
2. optical mirror slip as claimed in claim 1, it is a plurality of right that each region of wherein said a plurality of annular vision correcting regions and described a plurality of annular vision out-focus region is grouped into, and in order to the centering identical, obtains first and second corresponding refractive power.
3. optical mirror slip as claimed in claim 2, wherein obtains described the first refractive power based on following formula:
( X + 2 ( i - 1 ) n - 1 D ) ,
Wherein:
X is the ametropia of human eye;
N is described right number; And
I is the right numbering of annular vision correcting region such as described grade and annular vision out-focus region.
4. optical mirror slip as claimed in claim 2 or claim 3, wherein obtains described the second refractive power based on following formula:
( X + 2 ( i - 1 ) n - 1 D ) + 2.5 D ,
Wherein:
X is the ametropia of human eye;
N is described right number; And
I is the right numbering of annular vision correcting region such as described grade and annular vision out-focus region.
5. the optical mirror slip as described in aforementioned any one claim, further comprises four or more than the alternating optical region of four.
6. the optical mirror slip as described in aforementioned any one claim, wherein has ten alternating optical regions.
7. the optical mirror slip as described in aforementioned arbitrary claim, wherein said the first refractive power comprises for each the power values of variation in described a plurality of vision correctings region.
8. the optical mirror slip as described in aforementioned arbitrary claim, wherein said the second refractive power comprises for each the power values of variation in myopic defocus region.
9. the optical mirror slip as described in aforementioned arbitrary claim, the form that wherein said optical mirror slip is contact lenses.
10. glasses, it comprises the optical mirror slip as described in any one in claim 1 to 8.
CN201280042852.6A 2011-07-27 2012-07-17 For slowing down the optical mirror slip of myopia development Active CN104094164B (en)

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US201161512255P 2011-07-27 2011-07-27
US61/512,255 2011-07-27
PCT/SG2012/000255 WO2013015743A1 (en) 2011-07-27 2012-07-17 Optical lens for slowing myopia progression

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