TWM644825U - Asymmetric defocusing lens and spectacles with the same - Google Patents

Abstract

This creation discloses an asymmetric defocus lens, which includes a lens body. A plurality of annularly distributed microlenses are provided on one side of the lens body where light enters. The plurality of microlenses together form a defocus area; the defocus area includes a far vision area. , myopia area, nasal area and temporal area; among them, the far vision area is distributed above the center of the light entrance surface of the lens body, the myopia area is distributed below the center of the light entrance surface of the lens body, and the nasal area is distributed on the light entrance surface of the lens body The side close to the nose and the temporal area are distributed on the side of the lens body's light entrance surface away from the nose; the defocus area can focus the parallel light rays that are about to enter the lens of the eye in front of the retina, so that these light rays are discrete when they reach the retina. , unable to image on the retina or behind the retina, thereby suppressing excessive growth of the axial length of the eye to correct myopia; this creation also proposes a pair of glasses using the above-mentioned asymmetric defocus lens.

Description

Asymmetrical defocus lenses and glasses using them

This creation relates to the field of lens optics technology, especially an asymmetric defocus lens and glasses using it.

Myopia is when the eye is in a relaxed state, and after the parallel light is refracted by the eye's refractive system, the focus falls in front of the retina, that is, the parallel light is imaged in front of the retina. The symptoms of myopia are: reduced distance vision and normal near vision, that is, It is commonly said that distant objects cannot be seen clearly but close objects can be seen clearly.

Teenagers often cause refractive errors due to unhealthy use of their eyes in class, homework or other daily activities, and teenagers who use their eyes in a state of refractive errors for a long time can lead to myopia; in recent years, teenagers use their eyes to cause myopia The probability of improper myopia is getting higher and higher.

People can correct their vision by wearing glasses. The lenses on the glasses can make parallel light rays image on the retina.

However, the lenses currently on the market can only enable people to see distant objects clearly, and cannot correct myopia based on the asymmetry of the human eye and the physiological mechanism of adjustment and convergence of the human eye in visual distance; for teenagers, Eyes are used more frequently during class and homework, and the eye axis of teenagers (as shown in Figure 4) is regarded as a central axis of the optical system in physics, which is the so-called "eye axis" from the distance between cornea-lens-vitreous-retina. ”) is still in the critical period of growth and development. If you wear the above lenses and It cannot make his/her eye axial length shorter and cannot correct his/her myopia. When his/her eye axis is fully developed, it will be difficult to correct his/her myopia.

The purpose of this creation is to provide an asymmetric defocus lens and glasses using the same. The asymmetric defocus lens of this creation can focus the parallel light rays that are about to enter the eye lens in front of the retina, so that these light rays are It is discrete and cannot image on or behind the retina. In this way, it can suppress the excessive growth of the eye axis and correct myopia.

To this end, in the first aspect, an embodiment of the present invention provides an asymmetric defocus lens, which includes a lens body, and a side of the lens body that admits light is provided with a plurality of annularly distributed microlenses. The microlenses together form a defocus area; the defocus area includes a far vision area, a near vision area, a nasal area and a temporal area; wherein the far vision area is distributed above the center of the light entrance surface of the lens body, and the near vision area The area is distributed below the center of the light-entrance surface of the lens body, the nasal area is distributed on the side of the light-entrance surface of the lens body close to the nose, and the temporal area is distributed on the light-entrance surface of the lens body away from the nose. side.

In some possible implementations, the microlens has a bottom surface connected to the light entrance surface of the lens body and an arc surface protruding from the light entrance surface of the lens body; the inner diameter r1 of the bottom surface is 800 μm to 1200 μm; the height h of the microlens protruding from the light entrance surface of the lens body is 0.5 μm to 1.5 μm; the radius r2 of the arc surface is 1.5×10^5 μm to 2.5×10^5 μm.

In some possible implementations, the plurality of microlenses are centered on the center of the light entrance surface of the lens body, and are distributed in multiple rows of annular shapes outward from the center.

In some possible implementations, the distance between two adjacent rows of microlenses is 1.5 to 2.5 times the inner diameter r1 of the bottom surface; The distance between the microlenses is 1.5 to 2.5 times the inner diameter r1 of the bottom surface.

In some possible implementations, the lens body has a front view area, and the front view area is distributed at the center of the defocus area.

In some possible implementations, the far vision area is a sector area of 30° to 150° in the counterclockwise direction of the horizontal radial line of the front view area; the temporal area is the counterclockwise direction of the horizontal radial line of the front view area. A fan-shaped area of 150° to 225°; the myopia zone is a fan-shaped area of 225° to 315° in the counterclockwise direction of the horizontal diameter of the front view zone; the nasal area is the counterclockwise direction of the horizontal diameter of the front view zone A sector-shaped area with a direction of 30° to 45° clockwise; wherein the horizontal diameter of the front view area passes through the center of the light entrance surface of the lens body.

In some possible implementations, the microlens and the lens body are an integrally formed structure, or the microlens is arranged on the lens body in a pressing manner.

In some possible implementations, the lens body includes PC lenses.

In some possible implementations, the microlens is made of PMMA, PET or PC.

In a second aspect, the invention also provides glasses, which include a frame and at least one asymmetrical defocusing lens as described in the first aspect; the asymmetrical defocusing lens is provided on the frame.

This creation proposes an asymmetrical defocusing lens and glasses using the same. Compared with the conventional technology, the beneficial effect is that in this asymmetrical defocusing lens, a plurality of rings are provided on one side of the lens body that admits light. There are microlenses distributed in a shape, and each microlens can change the refraction direction of light. Therefore, multiple microlenses jointly form a defocus area, which can focus the parallel light rays that are about to enter the lens of the eye in front of the retina, so that these light rays reach the The retina is discrete and cannot image on the retina or behind the retina. In this way, excessive growth of the axial length of the eye can be suppressed to correct myopia; the defocus area includes the far vision area, myopia area, nasal area and temporal area. In this way, this Asymmetrical defocus lenses can produce the most appropriate defocus effect according to the specific eyeball structure to correct myopia.

The glasses of this invention include a frame and at least one of the above-mentioned asymmetrical defocusing lenses. The frame can suspend and fix the asymmetrical defocusing lens in front of the patient's eyes to ensure that the asymmetrical defocusing lens can defocus the light stably.

1: Lens body

11: Light entrance surface

12: Shiny surface

2:Microlens

21: Bottom

22: Arc surface

3: Defocus area

31: Far vision zone

32: Myopia area

33: Nasal area

34: Temporal area

4: Front view area

41: Horizontal diameter line

5: Eyeball structure

51:Retina

52:Lens

53: Cornea

54: eye axis

α1~α4: sector area

b1~b2: spacing

h: height

r1: inner diameter

r2:radius

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, a brief introduction will be made below to the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those with general knowledge in the relevant technical field, other schemas can be obtained based on these schemas without exerting creative work. In addition, in the drawings, the same component symbols are used for the same components, and the drawings are not drawn to actual scale.

Figure 1 is a schematic diagram of the defocus area distribution of an asymmetric defocus lens according to an embodiment of the present invention; Figure 2 is an enlarged view of Figure 1; Figure 3 is a schematic structural diagram of a microlens; Figure 4 is a schematic diagram of the eyeball structure; Figure 5 This is a schematic diagram of the defocus effect of the glasses of this creation.

In order to make the purpose, technical solutions and advantages of this creative embodiment more clear, the technical solutions in this creative embodiment will be clearly and completely described below in conjunction with the drawings in this creative embodiment. Obviously, the described embodiment It is a part of the embodiments of this creation, but not all the embodiments. Based on the embodiments in this creation, all other embodiments obtained by those with ordinary knowledge in the technical field without any creative work shall fall within the scope of protection of this creation.

As shown in Figures 1 to 5, the embodiment of the invention proposes an asymmetric defocus lens in the first aspect, which includes a lens body 1, and a plurality of annular distributions are provided on one side of the lens body 1 where light enters. The microlens 2, multiple microlenses 2 together form a defocus area 3; the defocus area 3 includes a far vision area 31, a near vision area 32, a nasal area 33 and a temporal area 34; wherein the far vision area 31 is distributed on the lens body 1 Above the center of the light entrance surface 11, the myopia area 32 is distributed below the center of the light entrance surface 11 of the lens body 1, the nasal area 33 is distributed on the side of the light entrance surface 11 of the lens body 1 close to the nose, and the temporal area 34 is distributed on the lens The light entrance surface 11 of the main body 1 is on the side away from the nose.

Based on the above technical solution, in this asymmetric defocus lens, a plurality of annularly distributed microlenses 2 are provided on one side of the lens body 1 where light enters. Each microlens 2 can change the refraction direction of light. Therefore, Multiple microlenses 2 together form a defocus area 3, which can focus the parallel light rays that are about to enter the eye lens 52 in front of the retina 51, so that these light rays are discrete when they reach the retina 51 and cannot be on or behind the retina 51. Imaging, thereby suppressing excessive growth of the axial length of the eye 54 to correct myopia.

Generally, the eyeball is not a spherical structure, but an asymmetrical ellipsoidal structure. The horizontal radial refractive power of the lens 52 and the vertical radial refractive power of the incident light are different. In order to adapt to the lens 52, ensure that it falls within The discrete light rays in various directions on the retina 51 are inconsistent, and the asymmetric defocus lens sets the defocus amount in each direction of the defocus area 3 to be different. The defocus area 3 includes a far vision area 31, a near vision area 32, a nasal area 33 and a temporal area 34. The far vision area 31 is distributed above the center of the light entrance surface 11 of the lens body 1, and the near vision area 32 is distributed in the center of the lens body 1. Below the center of the light surface 11, the nasal side area 33 is distributed on the side of the lens body 1 light entrance surface 11 close to the nose, and the temporal side area 34 is distributed on the side of the lens body 1 light entrance surface 11 away from the nose. In this way, it is not symmetrical. Defocus lenses can produce the most appropriate defocus effect according to the specific eyeball structure 5 to achieve the best myopia correction effect.

It needs to be explained here that after the light reflected by the object is defocused by the asymmetric defocus lens, it will first be focused in front of the retina 51. When these light rays reach the retina 51, they are discrete and cannot be viewed. The image is formed on the retina 51 or behind the retina 51. In this way, the focus is in front of the retina 51. When the person is looking at something, the eyes will automatically adjust, which will drive the eye axis 54 to shorten, so that the retina 51 moves forward (the eye axis 54 is the cornea 53 -The distance between the lens 52-vitreous body-retina 51, the axial length of the eye 54 is shortened, and the retina 51 is closer to the cornea 53, which can be understood as the retina 51 moving forward). In this way, excessive growth of the axial length of the eye 54 can be suppressed, and the axial length of the eye 54 can also be shortened. , to correct myopia.

In some embodiments, the microlens 2 has a bottom surface 21 connected to the light entrance surface 11 of the lens body 1 and an arc surface 22 protruding from the light entrance surface 11 of the lens body 1; the inner diameter r1 of the bottom surface 21 is 800 μm to 1200 μm; The height h of the microlens 2 protruding from the light entrance surface 11 of the lens body 1 is 0.5 μm to 1.5 μm; the radius r2 of the arc surface 22 is 1.5×10^5 μm to 2.5×10^5 μm.

Parallel light rays will be refracted when entering the arc surface 22 of the microlens 2, and then pass through the microlens 2 and the lens body 1 successively, and emerge from the light exit surface 12 of the lens body 1. When entering the lens 52, the light rays The incident angle has changed. After being refracted by the lens 52, these light rays will be focused in front of the retina 51. Therefore, these light rays are discrete when they reach the retina 51, and cannot be imaged on the retina 51 or behind the retina 51, and will not be driven. The axial length of the eye 54 is excessively expanded backward. For teenagers, the axial length of the eye 54 is a critical period of development. This asymmetric defocus lens can inhibit the excessive expansion of the axial length of the eye 54 backward, thereby correcting myopia in teenagers.

In this creation, the inner diameter r1 of the bottom surface 21 is 800 μm to 1200 μm; the height h of the microlens 2 protruding from the light entrance surface 11 of the lens body 1 is 0.5 μm to 1.5 μm; the radius r2 of the arc surface 22 is 1.5×10 ^5μm to 2.5×10^5μm. Therefore, the defocus amount of these microlenses 2 is between +2.5D and +3.0D, or higher than +3.0D. Therefore, this invention can be used accordingly according to the patient's myopia degree. Set the defocus amount for defocus zone 3. Generally, the defocus amount of the far vision area 31, myopia area 32, nasal area 33 and temporal area 34 of this invention can be set to +2.5D to +3.0D to adapt to the myopia degree of most patients; this invention The creation can also be based on the myopia degree of a small number of patients. For example, when the myopia degree of a young patient is 600°, the creation can set the defocus amount of the far vision area 31, myopia area 32, nasal area 33 or temporal area 34 to +6.0 D.

Generally, based on the unique structure of the eyeball, the fundus is approximately a sphere, and the macular position of the retina 51 belongs to the imaging area, and the distance from the periphery to the front apex of the cornea 53 gradually changes; therefore, in this creation, multiple microlenses 2 and The center of the light entrance surface 11 of the lens body 1 is the center of the circle, and is distributed in multiple rows of annular shapes from the center outward. Based on the motion trajectory of the eyeball, this trajectory rotates from the center to the periphery. Therefore, these microlenses 2 spread from the center of the lens body 1 to the periphery to ensure that everything is visible within the effective field of view of the glasses. Complete defocus effect.

Further, the distance b1 between two adjacent rows of microlenses 2 is 1.5 to 2.5 times the inner diameter r1 of the bottom surface 21; the distance b2 between two adjacent microlenses 2 in a row of microlenses 2 is It is 1.5 times to 2.5 times the inner diameter r1 of the bottom surface 21. In this way, interference between two adjacent microlenses 2 can be prevented, causing discrete light rays to intertwine and affect the defocusing effect.

In this creation, the lens body 1 has a front view area 4, which is distributed in the center of the defocus area 3. The front view area 4 is used to correct vision. The light passing through the front view area 4 will be clearly imaged on the retina 51, so that the The patient can see clearly so that the patient can perform daily activities.

This creation distributes the front view area 4 at the center of the defocus area 3, which is based on the human eye's viewing habits. In daily life, people are used to looking at objects directly, that is, the light reflected by the object directly enters the lens 52 and is refracted by the lens 52 Then it is focused and imaged on the retina 51; therefore, when the patient wears this lens, the front view area 4 can allow the light reflected by the object to directly enter the lens 52, so that people can see the object clearly, and the defocus area 3 can allow the light reflected by the object to enter the lens 52 obliquely. The light is defocused so that myopia can be corrected.

It needs to be explained here that correcting vision means refracting the light through the lens so that the light can be clearly imaged on the patient's retina 51, but when the lens is removed, the patient still cannot see the object clearly; correcting myopia means making the light that is about to enter the eye lens 52 The parallel light rays are focused in front of the retina 51, so that these light rays are discrete when they reach the retina 51 and cannot be imaged on the retina 51 or behind the retina 51, thereby inhibiting the expansion of the eye axis 54. At the same time, it can also drive the eye axis 54 to shorten, so as to so that out-of-focus light can Focus on the retina 51 to correct myopia. In the later stage, the patient's myopia will be cured and the patient can see clearly without wearing glasses.

This creation can reasonably divide the defocus area 3 into light areas according to the field of view of the human eye. The far vision area 31 is a sector area α1 of 30° to 150° counterclockwise from the horizontal diameter line 41 of the front view area 4; the temporal area 34 It is a fan-shaped area α4 from 150° to 225° in the counterclockwise direction of the horizontal diameter line 41 of the front view zone 4; the near vision zone 32 is a fan-shaped area α2 from 225° to 315° in the counterclockwise direction of the horizontal diameter line 41 of the front view zone 4; the nasal area 33 is a fan-shaped area α3 extending from 30° in the counterclockwise direction to 45° in the clockwise direction of the horizontal radial line 41 of the front viewing area 4; wherein, the horizontal radial line 41 of the front viewing area 4 passes through the center of the light entrance surface 11 of the lens body 1.

Under normal circumstances, when viewing near, the eyeball will rotate downward and internally. Therefore, the defocus area 3 is divided into a far vision area 31, a temporal area 34, a near vision area 32 and a nasal area 33, so that the defocus area 3 can The focal area 3 can produce inconsistent defocus amounts in various directions. In this way, the defocus effect can be more effectively achieved and visual fatigue will not be caused by over-adjustment, thereby effectively inhibiting the growth of the eye axis 54 and correcting myopia.

In some embodiments, the microlens 2 and the lens body 1 are integrally formed, or the microlens 2 is mounted on the lens body 1 by pressing. The asymmetric defocus lens can be directly injection molded by injection molding. , in order to shorten the construction period, you can also use the pressing method to press the microlens 2 onto the lens body 1. When using the pressing method, the micro-lens 2 can be processed at the same time as the lens body 1, so that the construction period can also be shortened.

In this creation, the lens body 1 includes PC lenses. PC lenses, also known as space lenses and cosmic lenses, have the advantages of strong impact resistance and light weight.

In this creation, the material of the microlens 2 is PMMA, PET or PC. PMMA, whose Chinese name is polymethylmethacrylate, has the advantages of high transparency, low price, and easy machining; PET, whose Chinese name is polyphenylene Ethylene glycol diformate resin is characterized by: hardness, strong stiffness, high strength, toughness, and low friction coefficient; PC, whose Chinese name is polycarbonate, is a strong thermoplastic Sex resin. Using PMMA, PET and PC as the microlens 2 can refract light and ensure the structural stability of the microlens 2.

As shown in Figure 5, in a second aspect, the invention also provides glasses, which include a frame and at least one asymmetrical defocusing lens as described in the first aspect; the asymmetrical defocusing lens is provided on the frame.

The glasses of this invention include a frame and at least one of the above-mentioned asymmetrical defocusing lenses. The frame can suspend and fix the asymmetrical defocusing lens in front of the patient's eyes to ensure that the asymmetrical defocusing lens can defocus the light stably.

It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. mean that the described embodiments may include specific features, structures or characteristics, but not necessarily Each embodiment includes this particular feature, structure, or characteristic. Furthermore, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure or characteristic is described in connection with an embodiment, it is within the scope of one of ordinary skill in the art to implement such feature, structure or characteristic in conjunction with other embodiments, explicitly or not explicitly described.

It should be readily understood that "on," "on," and "on" in this disclosure should be construed in the broadest manner, so that "on" means not only "directly on something" but also "on something" with intermediate features or layers in between, and "on... "Above" or "on..." not only includes the meaning of "on something" or "on", but can also include "on something" or "on" without intervening features or The meaning of layer (that is, directly on something).

In addition, spatially relative terms may be used herein for ease of explanation, such as "below," "below," "below," "above," "above," etc., to describe the relative position of one element or feature to other elements or features. relationship shown. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation illustrated in the figures. Device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may be interpreted accordingly.

It should be noted that in this article, relational terms such as “first” and “second” are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is no such actual relationship or sequence between entities or operations. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those with ordinary knowledge in the technical field should understand that : It is still possible to modify the technical solutions recorded in the foregoing embodiments, or to equally replace some or all of the technical features; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technology of the embodiments of this invention. Scope of the program.

1: Lens body

2:Microlens

3: Defocus area

31: Far vision zone

32: Myopia area

33: Nasal area

34: Temporal area

4: Front view area

41: Horizontal diameter line

α1~α4: sector area

Claims (10)

An asymmetric defocus lens, which includes a lens body. A plurality of annularly distributed microlenses are provided on one side of the lens body where light enters, and the plurality of microlenses jointly form a defocus area; The defocus area includes a far vision area, a near vision area, a nasal area and a temporal area; Wherein, the far vision area is distributed above the center of the light entrance surface of the lens body, the near vision area is distributed below the center of the light entrance surface of the lens body, and the nasal side area is distributed on the center of the lens body. The light entrance surface is on the side close to the nose, and the temporal area is distributed on the side of the light entrance surface of the lens body away from the nose. The asymmetric defocus lens according to claim 1, wherein the microlens has a bottom surface connected to the light entrance surface of the lens body and an arc surface protruding from the light entrance surface of the lens body; The inner diameter r1 of the bottom surface is 800 μm to 1200 μm; The height h of the microlens protruding from the light entrance surface of the lens body is 0.5 μm to 1.5 μm; The radius r2 of the arc surface is 1.5×10^5 μm to 2.5×10^5 μm. The asymmetric defocus lens according to claim 2, wherein the plurality of microlenses are centered on the center of the light entrance surface of the lens body and are distributed in multiple rows of annular shapes outward from the center. . The asymmetric defocus lens according to claim 3, wherein the distance between two adjacent rows of microlenses is 1.5 to 2.5 times the inner diameter r1 of the bottom surface; The distance between two adjacent microlenses in a row of microlenses is 1.5 to 2.5 times the inner diameter r1 of the bottom surface. The asymmetric defocus lens according to claim 1, wherein the lens body has a front view area, and the front view area is distributed at the center of the defocus area. The asymmetric defocus lens according to claim 5, wherein the far vision zone is a sector-shaped area of 30° to 150° in the counterclockwise direction of the horizontal diameter of the front view zone; The temporal area is a fan-shaped area ranging from 150° to 225° in the counterclockwise direction of the horizontal diameter of the front view area; The near vision zone is a sector-shaped area ranging from 225° to 315° in the counterclockwise direction of the horizontal diameter of the front view zone; The nasal area is a fan-shaped area ranging from 30° in the counterclockwise direction to 45° in the clockwise direction of the horizontal diameter of the front view area; Wherein, the horizontal diameter of the front view area passes through the center of the light entrance surface of the lens body. The asymmetric defocus lens according to claim 1, wherein the microlens and the lens body are an integrally formed structure, or the microlens is arranged on the lens body in a pressing manner. The asymmetric defocus lens according to claim 1, wherein the lens body includes a PC lens. The asymmetric defocus lens according to claim 1, wherein the microlens is made of PMMA, PET or PC. A kind of glasses, which includes a frame and at least one asymmetric defocus lens as described in any one of claims 1 to 9; The asymmetric defocus lens is provided on the frame.