CN219625832U - Myopia Control Lenses and Glasses - Google Patents

Abstract

The utility model provides a myopia control lens and glasses, which comprise a lens body, wherein the front surface of the lens body is divided into a far-use area, a near-use area and a gradual change area, and the gradual change area is positioned between the far-use area and the near-use area; the far-field comprises a far-field optical zone and a far-field defocusing zone surrounding the far-field optical zone, a plurality of defocusing lenses with the surfaces in the shape of convex cambered surfaces are distributed in the far-field defocusing zone, and the plurality of defocusing lenses are distributed on a plurality of concentric circles taking the center of the far-field optical zone as the circle center; wherein, the refractive powers of a plurality of defocused lenses on the same concentric circle are equal; the more the power of the defocus lenses on the concentric circles that are equal or outside the power of the plurality of defocus lenses on the different concentric circles is, the greater the power of the defocus lenses. Based on the technical scheme of the utility model, the far-vision defocusing structure is optimally designed, and the defocusing lens is adopted to form gradient peripheral defocusing, so that the defocusing signal generated by the lens is more attached to the radian of retina, and the far-vision control effect is better.

Description

Myopia Control Lenses and Glasses

technical field

The utility model relates to the technical field of spectacle lenses, in particular to a myopia control lens and glasses.

Background technique

Myopia is a type of refractive error. When the eye is in a relaxed state, parallel rays of light enter the eye and focus in front of the retina, which causes no clear image to be formed on the retina, which is called myopia. Accommodation is the process by which the human eye makes nearby objects image on the retina by changing the refractive power of the lens, and the accommodative response is the actual amount of accommodation produced by an individual in response to accommodative stimuli. The occurrence and development of myopia are closely related to the adjustment ability. Using the eyes at close range for a long time will cause the ciliary muscle to spasm, cause the adjustment ability to decrease, change the adjustment parameters, and induce myopia.

At present, the vast majority of glasses on the market to control the progression of myopia are defocused glasses around the retina. These designs can be roughly divided into the middle distance optical zone and the surrounding defocus zone. Although such a design can achieve better defocus and central imaging effects when looking far, but due to the convergence of the eyes when seeing near, the line of sight and the lens The intersection point of the lens is shifted and enters the out-of-focus area, resulting in poor visual effect at close range. Moreover, the resulting peripheral defocus amount will change with the change of the eye accommodation response, and a stable defocus amount cannot be formed.

There are also various technical solutions for improving defocused glasses in the prior art. Chinese patent document CN203849514U discloses a wide field of view peripheral defocus spectacle lens, which divides the lens into areas, designs hyperopia, near vision and other areas, and combines peripheral defocus to realize myopia control. However, there are still some defects in this solution, such as no further design for the peripheral defocus of hyperopia, and the control effect of myopia is not perfect.

Utility model content

In order to solve the problem that the myopia control effect of the myopia lens in the prior art is not perfect, the utility model proposes a myopia control lens and glasses.

In the first aspect, a myopia control lens proposed by the utility model includes a lens body, the front surface of the lens body is a progressive surface, and the rear surface is a progressive surface or a spherical surface. a zone and a transition zone, the transition zone being located between the far zone and the near zone;

The distance zone includes a distance optics zone and a distance defocusing zone surrounding the distance optics zone, and a plurality of convex arc-shaped defocusing lenses are distributed in the distance defocusing zone, A plurality of defocus lenses are distributed on a plurality of concentric circles centered on the center of the distance optical zone;

Wherein, the refractive powers of the plurality of defocus lenses on the same concentric circle are equal; the refractive powers of the plurality of defocus lenses on different concentric circles are equal or on the outer concentric circles The greater the refractive power of the defocus lens.

In one embodiment, the refractive power of the distance optical zone is a, the refractive power of the defocus lens on the innermost concentric circle is a+Min, and the defocus lens on the outermost concentric circle is The refractive power of the focal lens is a+Max, and it satisfies: Min=(2.0-4.0)D, Max=(3.0-5.0)D.

In one embodiment, for two adjacent defocused lenses on the same concentric circle, the linear distance between the centers of the balls where the two defocused lenses are located is equal to the distance between the two defocused lenses. The ratio of the diameter of the ball where the focus lens is located is (0-2):(0-1).

In one embodiment, when the lens is worn, the near area is located directly below the geometric center of the lens body and biased toward the nose of the wearer.

In one embodiment, the refractive power of the distance optical zone is a, and the refractive power of the near zone is a+Add, wherein Add is +1.00D, +1.25D, +1.50D, +1.75D and +2.00 One of D.

In one embodiment, the curvature of the position corresponding to the transition area on the surface of the lens body changes continuously, and the refractive power of the area where the transition area is located gradually changes from a near the far area to near the near area. a+Add for the District section.

In one embodiment, the front surface of the lens body is further divided into peripheral aberration zones, and the two peripheral aberration zones are respectively located on two sides of the common area where the near zone and the transition zone are located.

In one embodiment, the peripheral aberration zone adopts a free-form surface design, and the high-order aberration of the peripheral aberration zone has a Greater oblique coma and trefoil.

In one embodiment, the near use zone is elliptical, and the major axis of the ellipse is parallel to the horizontal line of sight when the lens is worn.

In the second aspect, the spectacles provided by the utility model include the above-mentioned myopia control lens, and further have all the technical effects possessed by it.

The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the utility model can be achieved.

Compared with the prior art, the myopia control lens and glasses provided by the utility model have at least the following beneficial effects:

The myopia control lens and glasses of the utility model are optimized for the hyperopia defocusing structure, and the defocusing lens is used to form a gradient peripheral defocusing, so that the defocusing signal generated by the lens fits the radian of the retina better, and has better Myopia control effect.

Description of drawings

Hereinafter, the present utility model will be described in more detail based on the embodiments and with reference to the accompanying drawings. in:

Fig. 1 has shown the front schematic diagram of myopia control lens of the present utility model;

Fig. 2 has shown the schematic diagram of the section of myopia control lens of the present utility model;

Fig. 3 shows a partial schematic view of the out-of-focus lens part of the myopia control lens of the present invention.

In the figures, the same parts are given the same reference numerals. The drawings are not to scale.

Reference signs:

1-distance zone, 11-distance optical zone, 12-distance defocus zone, 121-defocus lens, 2-gradient zone, 3-near zone, 4-peripheral aberration zone, 5-lens body, 51 - front surface, 52 - rear surface.

Detailed ways

The utility model will be further described below in conjunction with accompanying drawing.

The embodiment of the present utility model provides a kind of myopia control lens, comprises lens body 5, and the front surface 51 of lens body 5 is progressive surface, and rear surface 52 is progressive surface or spherical surface, and front surface 51 is divided into far zone 1, near zone. Zone 3 and transition zone 2, transition zone 2 is located between far zone 1 and near zone 3;

The distance zone 1 includes a distance optics zone 11 and a distance defocusing zone 12 surrounding the distance optics zone 11. A plurality of convex arc-shaped defocusing lenses 121 are distributed in the distance defocusing zone 12. A plurality of defocus lenses 121 are distributed on a plurality of concentric circles with the center of the distance optical zone 11 as the center;

Wherein, the refractive power of a plurality of defocus lenses 121 on the same concentric circle is equal; big.

Specifically, as shown in Figures 1 and 2 of the accompanying drawings, the lens of the present utility model is also firstly divided into areas on the lens, and the front surface of the lens body is divided into the distance zone, The gradient area and the near-use area are used for different line-of-sight requirements. Among them, the utility model is further designed especially for the far-use area, specifically, the defocus structure of the far-use area is designed.

Specifically, the distance optical zone is further divided in the middle of the distance zone. The distance optical zone is a circle with a diameter of 7-10mm. The refractive power in this range is determined by the wearer's refractive error and is used to correct the distance. Refractive errors during use can achieve good vision at distance vision; the center of the distance vision optical zone is located 8-10mm vertically above the geometric center of the lens body. Then, the remaining area of the distance use area surrounding the distance use optical area is used as the distance use defocus area, and a defocus lens is arranged in the distance use defocus area to realize the defocus function. The surface of the out-of-focus lens is a convex arc shape, which is a convex lens that can produce a certain refractive power. It can be a spherical structure or other arc-surface structures. As shown in Figure 2 and Figure 3 of the accompanying drawings, the diameter of the defocus microlens is 0.5-2mm. A plurality of defocus lenses are distributed on a plurality of concentric circles, and the utility model is further designed for the refractive power of the defocus lenses. Along the radial outward direction of the concentric circle structure, the refractive power of the defocus lenses at different positions can be different. change or increase gradually. In this embodiment, the refractive power of the defocus lens at different positions along the radially outward direction of the concentric circle structure is preferably gradually increased, so that a gradient peripheral defocus can be formed, and the gradient peripheral defocus makes the defocus signal generated by the lens It fits the curvature of the retina better and has a better myopia control effect. In addition, the defocusing area for distance can keep the retinal peripheral imaging in the state of myopia and defocusing when the distance is far, preventing the compensatory growth of the eye axis and finally controlling myopia.

In addition, the utility model is a kind of multi-focal myopia lens. When the wearer sees far away, he can meet the needs of distance vision through the distance zone of the lens. Ciliary muscle, relieve accommodative spasm to reduce accommodative lag, and ultimately avoid retinal hyperopic defocus, and more effectively control the progression of myopia.

Preferably, the refractive power of the distance optical zone 11 is a, the refractive power of the defocus lens 121 on the innermost concentric circle is a+Min, and the refractive power of the defocus lens 121 on the outermost concentric circle is a+Max, and Satisfy: Min=(2.0-4.0)D, Max=(3.0-5.0)D.

In one embodiment, for two adjacent defocus lenses 121 on the same concentric circle, the linear distance between the centers of the balls where the two defocus lenses 121 are located is equal to the distance between the centers of the spheres where the defocus lenses 121 are located. The ratio of the diameters is (0~2):(0~1).

In one embodiment, when the lens is worn, the near zone 3 is located directly below the geometric center of the lens body 5 and biased to the side of the wearer's nose.

Specifically, for the lens shown in FIG. 1 of the accompanying drawings, if the position of the near area on the front surface of the lens is to the right, then in the perspective of the wearer, the position of the near area is to the left, and the lens corresponds to the right eye. The lens structure corresponding to the left eye is the same as that shown in Figure 1 of the accompanying drawings, except that the two are symmetrical to each other. The center of the near-use area is located 15-20mm vertically below the geometric center of the lens body, and is offset 2-4mm horizontally to the side where the nose is located. The offset design of the near-use area is more in line with the change of the wearer's line of sight and improves the user experience.

Preferably, the near area 3 is elliptical, and the long axis of the ellipse is parallel to the horizontal line of sight when the lens is worn, which is more suitable for the wearer's habit of scanning left and right with the near line of sight.

In one embodiment, the refractive power of the distance optical zone 11 is a (unit D), the near zone 3 is used to provide a certain degree of near addition, and the refractive power of the near zone 3 is a+Add, where Add is +1.00 One of D, +1.25D, +1.50D, +1.75D and +2.00D.

In one embodiment, the curvature of the surface of the lens body 5 corresponding to the position of the transition zone 2 changes continuously, and the refractive power of the area where the transition zone 2 is located gradually changes from a near the far zone 1 to a+ close to the near zone 3 Add.

Specifically, the gradient zone is located between the far zone and the near zone, and the curvature of its surface changes continuously, thereby realizing the continuous gradual change of the refractive power of the gradient zone between the far zone and the near zone. If the refractive power of the far zone is a(D), and the near addition of the near zone is Add(D), then the refractive power of the near zone is a+Add(D), and the refractive power of the gradient zone is from a to a+Add. (D) Gradient between. The width of the gradient area is 9-10mm, and the length is 15-20mm.

In one embodiment, the front surface 51 of the lens body 5 is further divided into peripheral aberration zones 4 , and the two peripheral aberration zones 4 are respectively located on both sides of the common area where the near zone 3 and the transition zone 2 are located.

Preferably, the peripheral aberration zone 4 adopts a free-form surface design, and the high-order aberration of the peripheral aberration zone 4 has greater oblique coma in the part close to the common area where the near zone 3 and the gradient zone 2 are located. Not as good as clover.

Specifically, the peripheral aberration zone is composed of the original peripheral zone of the lens body, distributed on both sides of the gradient zone and the near zone, and under the far zone. Due to the relatively high high-order aberrations in the original peripheral area of the lens body, the visual effect at near vision is mediocre, and swimming is prone to occur. The utility model modulates the high-order aberration in the peripheral aberration area by means of the free-form surface technology, increases oblique coma and clover aberration, reduces astigmatism and negative primary spherical aberration in the area close to the gradient area and the near-use area, Thereby further enhancing the effect of myopia control. The specific steps of free-form surface technology to control high-order aberrations are as follows:

1. Using the wavefront aberration sensor to obtain the wavefront aberration in the peripheral aberration area. Specifically, the wavefront aberration W of the peripheral aberration area is obtained by measuring the wavefront aberration sensor.

2. Use the Zernike polynomial to fit the wavefront aberration W and expand it to obtain the distribution of higher-order aberrations. Specifically, Zernike polynomials are used to expand the obtained wavefront aberration W. The Zernike polynomial can establish a corresponding relationship with the Seidal aberration of the optical system, and each item of its orthogonal basis function represents a specific imaging aberration, and each item has actual physical meaning. Therefore, various aberrations that affect the imaging quality of the lens can be directly obtained through Zernike polynomial expansion.

Zernike polynomials are usually defined in polar form, consisting of functions of the radial coordinate ρ and the angular coordinate θ. The function is continuous and orthogonal within the unit circle, and the expression is as follows:

in:

In the formula:

R(ρ) is an item only related to the radial direction, Θ(θ) is an item only related to the argument, n is the order of polynomial expansion; ρ is the radius on the circle, and the value range is [0,1]; θ is the frequency of the sine component, and the value range is [0, 2π]; m is the frequency; l is a parameter related to the angle, and the parity of l and n is the same. When 0≤m≤n, l=n-2m .

3. According to the set goal, optimize the Zernike polynomial coefficients and obtain the free-form surface design. Specifically, in the peripheral aberration zone, the curvature and the corresponding section curve corresponding to the curvature are reconstructed to realize the optimization of the curved surface for the purpose of setting the target . The surface optimization refers to keeping the surface sagittal height and surface normal direction unchanged in a certain area, optimizing the section curvature in the orthogonal direction, so that the aberration generated by the new section curvature is closer to or equal to the set target aberration distributed.

The embodiment of the utility model also provides a pair of glasses, which includes the above-mentioned myopia control lens, and further has all the technical effects possessed by it.

In describing the present utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", The orientation or positional relationship indicated by "right" is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation , are constructed and operated in a specific orientation and therefore cannot be construed as limiting the invention.

Although the invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It is therefore to be understood that numerous modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the invention as defined by the appended claims. It shall be understood that different dependent claims and features described herein may be combined in a different way than that described in the original claims. It will also be appreciated that features described in connection with individual embodiments can be used in other described embodiments.

Claims (10)

1. A myopia control lens, comprising a lens body, is characterized in that the front surface of the lens body is a progressive surface, and the rear surface is a progressive surface or a spherical surface, and the front surface is divided into a far zone, a near zone and a gradual change zone, the transition zone is located between the far zone and the near zone; The distance zone includes a distance optics zone and a distance defocusing zone surrounding the distance optics zone, and a plurality of convex arc-shaped defocusing lenses are distributed in the distance defocusing zone, A plurality of defocus lenses are distributed on a plurality of concentric circles centered on the center of the distance optical zone; Wherein, the refractive powers of the plurality of defocus lenses on the same concentric circle are equal; the refractive powers of the plurality of defocus lenses on different concentric circles are equal or on the outer concentric circles The greater the refractive power of the defocus lens. 2. The myopia control lens according to claim 1, wherein the refractive power of the distance optical zone is a, and the refractive power of the defocus lens on the innermost concentric circle is a+Min, the most The refractive power of the defocus lens on the outer concentric circle is a+Max, and satisfies: Min=(2.0˜4.0)D, Max=(3.0˜5.0)D. 3. The myopia control lens according to claim 1 or 2, characterized in that, for the two adjacent defocus lenses on the same concentric circle, where the two defocus lenses are located The ratio of the linear distance between the centers of the spheres to the diameter of the sphere where the defocus lens is located is (0-2):(0-1). 4. The myopia control lens according to claim 1, characterized in that, when the lens is worn, the near zone is located directly below the geometric center of the lens body and biased toward the wearer's nose side . 5. The myopia control lens according to claim 1 or 4, wherein the refractive power of the distance optical zone is a, and the refractive power of the near zone is a+Add, wherein Add is +1.00D, + One of 1.25D, +1.50D, +1.75D and +2.00D. 6. The myopia control lens according to claim 5, characterized in that the curvature of the position corresponding to the surface of the lens body and the transition zone changes continuously, and the refractive power of the area where the transition zone is located approaches the distance zone. The a of the portion changes gradually to a+Add of the portion close to the access zone. 7. The myopia control lens according to claim 1, characterized in that, the front surface of the lens body is further divided into peripheral aberration zones, and the two peripheral aberration zones are respectively located between the near zone and the Both sides of the area where the gradient areas are in common. 8. The myopia control lens according to claim 7, characterized in that, the peripheral aberration zone adopts a free-form surface design, and the high-order aberrations of the peripheral aberration zone are at the same level as the near zone and the gradient The adjacent parts of the areas where the districts are common have greater oblique coma and trefoil aberration. 9 . The myopia control lens according to claim 1 , wherein the near zone is elliptical, and the long axis of the ellipse is parallel to the horizontal line of sight when the lens is worn. 10. Spectacles, characterized by comprising the myopia control lens according to any one of claims 1 to 9.