A composite afocal lens for delaying the progression of hyperopia

Abstract

The present application belongs to the technical field of optical elements, and relates to a composite full-focus lens for delaying hyperopia development, wherein the first surface and the second surface of the lens are superimposed in front and back to form a convex lens with composite multi-focus and full-focus. The lens comprises: a central refractive power stable light area with a central refractive power, so that the refractive power stable light area can completely image on the retina; and a peripheral area located on the side of the refractive power stable light area, wherein the peripheral area has a multi-point defocus structure formed by a concave microlens array and has at least two peripheral refractive powers which decrease in a circumferential gradient, and the peripheral refractive power D1 satisfies the formula D1=D0(1-log 28 X)-n*Cos(X*Pi), wherein D0 is the central refractive power, the value range of n is 0.01-10, and X is the distance from the concave microlens to the center of the lens. The difference design is used to induce the elongation of the eye axis, delay the increase of the eye hyperopia, and is suitable for any hyperopia patient, and the effect is better for the hyperopia patient of teenagers.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of optical elements, and relates to a lens, in particular to a compound full-focus lens for delaying the development of hyperopia. BACKGROUND

[0002] A lens is a very familiar optical element, which is a passive optical element and is used to converge and diverge light radiation in an optical system. Different curved surfaces are designed on the surface of the lens to meet the needs of inhibiting the development of myopia and people with myopia and presbyopia. The traditional lens is relatively large in size and belongs to a refractive optical element. The same lens arranged in a plane in a certain period forms a lens array, and the optical properties of the lens array composed of ordinary lenses are the synthesis of the functions of single lenses.

[0003] However, with the progress of science and technology, current instruments and equipment have developed towards the trend of light, machine and electricity integration. The optical elements manufactured by traditional methods not only have complex manufacturing processes, but also have large size and heavy weight, which cannot meet the needs of the development of today's science and technology. At present, people have been able to manufacture very small lenses and lens arrays, which are usually not recognizable by the human eye and can only be observed by using a microscope, a scanning electron microscope, an atomic force microscope and the like, that is, micro-lenses and micro-lens arrays.

[0004] The micro-lenses and micro-lens arrays manufactured by micro-optical technology have become a new research development direction due to their small size, light weight, easy integration and array, and the like. With the development trend of miniaturization of optical elements, many new technologies have been developed to reduce the size of lenses and lens arrays, and now it is possible to manufacture micro-lenses and micro-lens arrays with a diameter of millimeters, micrometers or even nanometers.

[0005] For example, a micro-lens peripheral defocus spectacle lens is disclosed in Chinese Patent Application No. CN110687689A, which is set as a central correction zone, a nasal micro-lens zone, a temporal micro-lens zone and a lower micro-lens zone. The nasal micro-lens zone and the temporal micro-lens zone each set two gradient micro-lens zones and full-amount micro-lens zones with different refractive powers. Alternatively, the spectacle lens is set as a central correction zone and a ring-shaped micro-lens zone. The ring-shaped micro-lens zone sets two gradient ring-shaped micro-lens zones and full-amount ring-shaped micro-lens zones with different refractive powers, or is set as a ring-shaped lower micro-lens zone in the lower region of the ring-shaped micro-lens zone. The micro-lens zone is composed of a plurality of independent micro-lens arrays. In at least two or more micro-lens array regions, the refractive power, shape and diameter length of the micro-lenses are set to be different from each other. The independent micro-lenses are set as convex lenses relative to the central correction zone, the diameter length is 0.2mm to 4.5mm, and the distance between adjacent two micro-lenses is 0.1mm to 0.4mm.

[0006] For example, the Chinese invention patent application with the publication number CN215494400U discloses a myopia defocus glasses with superimposed micro-lenses, which is composed of a mother surface and a sub-surface. The mother surface is a rotationally symmetric surface for reducing paracentral hyperopia defocus, and the sub-surface is a spherical or aspherical micro-lens surface with positive refractive power. The two design surfaces are superimposed on the same refractive surface of the glasses or act on the front and rear two refractive surfaces respectively, forming a first refractive region for correcting refractive errors of the eye, a second refractive region for correcting hyperopia defocus, and a third refractive region for composite myopia defocus. Through the structure of the three refractive regions, the soft transition between the first and second refractive regions is achieved, the wearing comfort and functionality are improved, and the growth of the eye axis of adolescents is effectively inhibited to delay the deepening of myopia in adolescents.

[0007] The above technical solution uses micro-lens defocus to solve the control problem of myopia. However, hyperopia problems also occur frequently in children. The visual acuity of hyperopia has a close relationship with the degree of hyperopia. Mild hyperopia can be compensated by accommodation without causing visual impairment. However, if the hyperopia cannot be compensated by accommodation, it becomes absolute hyperopia, which often causes visual impairment of varying degrees. The general correction visual acuity of hyperopia: visual impairment caused by hyperopia is relatively common, especially as age increases, accommodation decreases, and latent hyperopia gradually changes to manifest hyperopia. In this way, not only the hyperopia decreases, but also the near vision is more likely to be impaired. Therefore, it is particularly important to control the development of hyperopia, and there is an urgent need for a micro-lens that can delay the development of hyperopia. SUMMARY

[0008] The purpose of the present application is to solve the above problems, and provide a composite full-focus lens for delaying the development of hyperopia.

[0009] The present application creatively proposes a composite full-focus lens for delaying the development of hyperopia, which comprises a lens, and the first surface and the second surface of the lens are superimposed in front of and behind to form a convex lens with composite multi-focal and full-focus.

[0010] The lens comprises:

[0011] A central refractive power stable light area with a central refractive power, so that the refractive power stable light area completely images the object on the retina;

[0012] A peripheral area located on the side of the refractive power stable light area, the peripheral area has a multi-point defocus structure composed of a concave micro-lens array, so that the peripheral area has at least two peripheral refractive powers with a gradient decrease in the circumferential direction, and the peripheral refractive power D1 satisfies the formula (I):

[0013] [D1 = D0 (1 - log 28 X) - n*Cos(X*π)] （I）

[0014] Wherein D0 is the central refractive power, n is in the range of 0.01-10, and X is the distance from the center of the concave microlens to the center of the lens in millimeters.

[0015] The peripheral region adopts a special peripheral refractive power gradient, so that the peripheral region visual imaging part falls behind the retina, inducing eye axis elongation, delaying the increase of eye hyperopia;

[0016] The concave microlens array is located in the peripheral region, so that the peripheral refractive power is determined by the central refractive power, the concave microlens and the defocus degree, and the gradient reduction of the peripheral refractive power is realized by the size of the concave microlens refractive power on the lens. In the same lens, the size of the concave microlens refractive power is related to the distance from the center of the concave microlens to the center of the lens.

[0017] In the above-mentioned composite full-focus lens for delaying the development of hyperopia, the area of the refractive power stable light region is in the range of 1-200 square millimeters.

[0018] In the above-mentioned composite full-focus lens for delaying the development of hyperopia, the area of the peripheral region is in the range of 10-20000 square millimeters.

[0019] In the above-mentioned composite full-focus lens for delaying the development of hyperopia, the peripheral refractive power is in the range of -10.00D to +20.00D.

[0020] In the above-mentioned composite full-focus lens for delaying the development of hyperopia, the peripheral refractive power is in the range of -10.00D to -1.00D.

[0021] In the above-mentioned composite full-focus lens for delaying the development of hyperopia, the concave microlens array is arranged in a hexagonal array along the side of the refractive power stable light region by a plurality of independent concave microlenses, and the diameter of the concave microlens decreases layer by layer from inside to outside. So as to achieve better progressive effect of inducing eye axis elongation.

[0022] In the above-mentioned composite full-focus lens for delaying the development of hyperopia, the first surface of the lens is a defocus structure, and the multi-point defocus structure is arranged on the second surface of the lens.

[0023] In the above-mentioned composite full-focus lens for delaying the development of hyperopia, the defocus structure is a spherical surface structure.

[0024] In the above-mentioned composite full-focus lens for delaying the development of hyperopia, the defocus structure is a spherical surface structure with a diameter of 250-500 millimeters.

[0025] In the composite full-focus lens for delaying the development of hyperopia, the peripheral region covers the region of the lens other than the refractive power stable light region. The imaging of the viewed object falls completely on the retina and behind the retina, increasing the stimulation of the peripheral light region to the retina behind the retina, without blind area, inducing the elongation of the eye axis, delaying the increase of the hyperopia of the eye.

[0026] Compared with the prior art, the application has the advantages of:

[0027] 1) The application uses the lens to form the refractive power stable light region and the peripheral region, induces the elongation of the eye axis, delays the increase of the hyperopia of the eye, and the peripheral refractive power is reduced according to the viewing habit of the human eye, the transition is soft, there is no blind area, the comfort is high, the applicability is strong, and it is suitable for any hyperopia patient, especially for the hyperopia patient of teenagers.

[0028] 2) The application adopts the differential design of the multi-point defocus structure of the concave microlens formed by the defocus structure and the concave microlens, provides a small defocus amount through the superposition effect of the concave microlens and the spherical structure, and makes the retina better adapt to the defocus of the peripheral region. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structure schematic view of one side of a lens provided by the application.

[0030] Figure 2 is a partial enlarged view of Figure 1 .

[0031] Figure 3 is a structure schematic view of the other side of a lens provided by the application.

[0032] Figure 4 is a partial cross-sectional schematic view provided by the application.

[0033] In the figure, 1 is a lens, 2 is a refractive power stable light region, 3 is a peripheral region, and 4 is a concave microlens. DETAILED DESCRIPTION

[0034] The application is further illustrated by the following specific examples.

[0035] In the following description, many specific details are set forth in order to provide a thorough understanding of the application, but the application can also be practiced without the specific details disclosed herein, and therefore the application is not limited to the specific embodiments disclosed below.

[0036] Example 1

[0037] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown is a composite full-focus lens for delaying the development of hyperopia. The lens 1 has a first surface and a second surface. Among them, the first surface is the outer surface, adopting a spherical surface structure with a radius R of 500 mm; the second surface is the inner surface, adopting a microlens multi-point defocus structure with a concave microlens array. The first surface and the second surface are superimposed in front and back to form a composite multi-focal and full-focus convex lens.

[0038] The lens 1 includes a refractive stable light area 2 and a peripheral area 3.

[0039] The refractive stable light area 2 is located at the center of the lens 1, and the central refractive power is +4.00D. The radius of the refractive stable light area 2 is 5 mm.

[0040] The peripheral area 3 is located on the side of the refractive stable light area 2, covering the area of the lens 1 except the refractive stable light area 2, and the radius of the peripheral area 3 is 30 mm. The diameter of the concave microlens is 0.6 mm.

[0041] The concave microlens array of the peripheral area 3 adopts a plurality of peripheral refractive powers which decrease along the center to the periphery. The peripheral refractive power takes +4.00D as the initial value, and changes according to the gradient D1=D0*(1-log 28 X)-n*Cos(X*π), n=0.005, that is, the peripheral refractive power of the concave microlens corresponding to the radius X of 6 mm is 1.84D; the peripheral refractive power of the concave microlens corresponding to the radius X of 7 mm is 1.66D; the peripheral refractive power of the concave microlens corresponding to the radius X of 8 mm is 1.50D; the peripheral refractive power of the concave microlens corresponding to the radius X of 9 mm is 1.36D; the peripheral refractive power of the concave microlens corresponding to the radius X of 10 mm is 1.24D; the peripheral refractive power of the concave microlens corresponding to the radius X of 11 mm is 1.12D; the peripheral refractive power of the concave microlens corresponding to the radius X of 11 mm is 1.01D, and so on. The above data can be tested by NIMO and focal length meter.

[0042] Example 2

[0043] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 is a composite full-focus lens for delaying the development of hyperopia. The lens 1 has a first surface and a second surface. Among them, the first surface is the outer surface, adopting a spherical surface structure with a radius R of 500 mm; the second surface is the inner surface, adopting a microlens multi-point defocus structure with a concave microlens array. The first surface and the second surface are superimposed in front and back to form a composite multi-focal and full-focus convex lens.

[0044] The lens 1 includes a refractive stable light area 2 and a peripheral area 3.

[0045] The dioptric stable light area 2 is located in the center of the lens 1, and the central dioptric power is +5.00D. The radius of the dioptric stable light area 2 is 5mm.

[0046] The peripheral area 3 is located on the side of the dioptric stable light area 2, covering the area of the lens 1 except the dioptric stable light area 2, and the radius of the peripheral area 3 is 30mm. The diameter of the concave microlens is 0.6mm.

[0047] The concave microlens array of the peripheral area 3 adopts a plurality of peripheral dioptric powers which decrease along the center to the periphery. The peripheral dioptric power takes +5.00D as the initial value, and decreases according to D1=D0*(1-log 28 X)-n*Cos(X*π), n=0.005, that is, the peripheral dioptric power of the concave microlens corresponding to the radius X of 6mm is 2.30D; the peripheral dioptric power of the concave microlens corresponding to the radius X of 7mm is 1.66D; the peripheral dioptric power of the concave microlens corresponding to the radius X of 8mm is 1.50D; the peripheral dioptric power of the concave microlens corresponding to the radius X of 9mm is 1.36D; the peripheral dioptric power of the concave microlens corresponding to the radius X of 10mm is 1.24D; the peripheral dioptric power of the concave microlens corresponding to the radius X of 11mm is 1.12D; the peripheral dioptric power of the concave microlens corresponding to the radius X of 11mm is 1.01D, and so on. The above data can be tested by NIMO and focal length meter.

[0048] The lens provided by the present application can make the peripheral area image through the concave microlens after the retina, generate gradient defocus, when the light passes through the microlens, a good defocus effect can be formed, when the light passes through the non-microlens part, a clear field of view can be formed, and the comfort and the effect of elongating the eye axis are better, the comfort of the wearer is greatly improved, and the comfort is better, which is consistent with the habit of human eye vision.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

[0050] Although the terms such as lens, dioptric stable light area, peripheral area, concave microlens are used more frequently herein. The use of these terms is only for more convenient description and explanation of the essence of the present application, and any kind of additional limitation by interpreting them is contrary to the spirit of the present application.

Claims

1. A full-focus lens for delaying the development of hyperopia, comprising a lens (1), characterized in that: The first surface and the second surface of the lens (1) are superimposed front and back to form a full-focus convex lens; The lens (1) comprises: a centrally located diopter-stable light region (2) having a central diopter D0; A peripheral region (3) located on the peripheral side of the diopter stable light region (2) has a multi-point defocus structure composed of a concave microlens array, so that the peripheral region (3) has at least two peripheral diopters D1 that decrease in a circumferential gradient. The concave microlens array is composed of a plurality of independent concave microlenses (4) arranged in a hexagonal array along the periphery of the diopter stable light region (2), and the diameter of the concave microlenses (4) decreases layer by layer from the inside to the outside. The first surface of the lens (1) is a defocus structure, and the multi-point defocus structure is provided on the second surface of the lens (1). The peripheral diopter D1 satisfies formula (1): (I)， Wherein D0 is the central diopter, n is in the range of 0.01 to 10, and X is the distance from the center of the concave microlens to the center of the lens, in millimeters.

2. The all-focal lens for delaying the progression of hyperopia according to claim 1, characterized in that: The area of ​​the diopter stable light region (2) ranges from 1 to 200 square millimeters.

3. The all-focal lens for delaying the progression of hyperopia according to claim 1, characterized in that: The area of ​​the peripheral region (3) ranges from 10 to 20,000 square millimeters.

4. The all-focal lens for delaying the progression of hyperopia according to claim 1, wherein: The peripheral diopter ranges from -10.00D to +20.00D.

5. The all-focal lens for delaying the progression of hyperopia according to claim 1, characterized in that: The peripheral diopter ranges from -10.00D to -1.00D.

6. The all-focal lens for delaying the progression of hyperopia according to claim 1, wherein: The defocusing structure is a spherical structure.

7. The all-focal lens for delaying the progression of hyperopia according to claim 6, characterized in that: The defocusing structure is a spherical structure with a diameter of 250 to 500 mm.

8. The all-focal lens for delaying the progression of hyperopia according to claim 1, wherein: The peripheral area (3) covers the area of ​​the lens (1) except the diopter stabilization light area (2).

Images