Red light vision control lens and glasses thereof

Abstract

The utility model belongs to the field of myopia glasses, and particularly relates to a red light vision control lens and glasses thereof. The technology comprises a lens, an optical function area is arranged on the lens along the center, an out-of-focus lens area is arranged on the lens on the outer side of the optical function area, the out-of-focus lens area is composed of a plurality of concave lenses, and red light transmission coatings are arranged on the outer sides of the lens in the out-of-focus concave lens area. According to the design, the double effects of vision correction and myopia prevention and control are conveniently achieved, an optical focus falls at the position far away from the retina and outside an eyeball adjusting area through the defocusing effect of the concave lens, light falling on the retina is a virtual image, and therefore the problem that the axis of the eye is forcibly increased is solved; and finally, part of light is filtered through the arrangement of the red light penetrating through the plating layer, the ratio of the red light reaching the fundus retina light is increased, as part of light of other wavebands is filtered out, the light in the defocus area is dark, the glasses are forced to see objects through the correction area, and the better vision correction effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to myopia glasses field especially is concerned with a red light vision control lens and glasses thereof. BACKGROUND

[0002] Myopia glasses is through the light dispersion, make the focal point that originally forms in the retina before delay falls on the retina of the myopic eye of the eye axis lengthening, thereby make the clear image. For the myopia crowd in the development period of eyeball, the existing ophthalmology shows that, when the ciliary muscle is tired, the accommodation will not be in time, the eye axis will tend to grow to the clear image position, thereby causing the passive elongation of the eye axis, accelerating the development of myopia.

[0003] At present, no matter whether the myopia prevention and control lens is provided with the defocus convex lens or the light diffusion point, there is a gap between the added elements, and the light passing through the gap can still be imaged on the position close to the retina after the retina, causing the passive growth of the eye axis, and the effect of myopia prevention and control is still limited. UTILITARY MODEL CONTENT

[0004] The utility model aims at providing a red light vision control lens, which can better control the growth rate of the eye axis of myopic people.

[0005] The red light vision control lens comprises a lens, an optical function area is arranged on the lens along the center, a defocus lens area in a ring structure is arranged on the lens outside the optical function area, the defocus lens area is composed of a plurality of concave lenses, and a red light transmission coating layer is arranged in the defocus lens area.

[0006] Further, the optical function area is located at the center of the lens, and the diameter of the optical function area is 10-11mm.

[0007] Further, the plane diameter of the concave lens is less than 1mm, the diopter of the concave lens is less than -2.0, and the edge distance of the concave lens is less than 0.6mm.

[0008] Further, the light transmittance of the red light transmission coating layer to the 630-650nm wave band light is between 80-100%.

[0009] Further, there is no gap between the light spots formed on the rear surface of the lens after refraction by the concave lenses.

[0010] Further, the single-layer thickness of the red light transmission coating layer is less than 81nm.

[0011] The scheme also relates to a glasses, and the scheme comprises a lens.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model discloses a cooperation through optical function area and off focus lens area realizes the dual effect of vision correction and myopia prevention and control, and then through the off focus effect of concave lens, makes the optical focus fall in the position of far behind retina, makes the light focus fall outside the eye axis adjustment area, and the light falling on the retina is virtual image, thereby avoiding the problem of forced growth of eye axis, finally through the setting of red light through plating layer and increase the red light ratio reaching the fundus retina, and the red light can continuously stimulate the retinal pigment epithelial cell secretion dopamine, improve the blood circulation of fundus, increase the choroid thickness of eye posterior pole, pull up the oxygen content of sclera, thereby consolidates the sclera and reaches the effect of inhibiting the abnormal growth of eye axis, and the red light of this waveband is derived from natural light, and the intensity is soft, and the irritability to human eye is little, and the reliability is high. And the single waveband red light through plating layer attached to the surface of the lens is dark because of filtering out part of other waveband light, and the light outside the optical function area is not clear, and the line of sight is forced to automatically pass through the optical function area and looks, and the vision correction effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of the utility model;

[0015] Figure 2 It is Figure 1 The right view of;

[0016] Figure 3 It is Figure 1 The A-A section view of;

[0017] Figure 4 It is Figure 3 The enlarged view of B of;

[0018] Figure 5 It is the structure schematic diagram of optical function area;

[0019] Figure 6 It is the structure schematic diagram of concave lens;

[0020] The names of various components in the drawing: 1, lens; 2, optical function area; 3, off focus lens area; 4, concave lens; 5, red light through plating layer. DETAILED DESCRIPTION

[0021] The utility model is further described below by specific embodiment in conjunction with the drawings, but is not used to limit the utility model, and any modification, equivalent replacement, improvement etc. that is made within the spirit and principles of the utility model should be included in the protection scope of the utility model. EMBODIMENT

[0022] The lens of red light vision control described in the embodiment, like Figure 1 And Figure 2As shown, it includes a lens 1, and an optical functional area 2 is provided at the center of the lens 1. The optical functional area 2 ensures that light is correctly focused on the retina and provides a clear field of vision. The diameter of the optical functional area can be obtained by back-calculation of the parameters of the eyeball using geometric methods.

[0023] like Figure 5 As shown, the diameter of the optical functional area is 10.0~11.0mm. This value is derived from the parameters of the eyeball through geometric methods. The position and angle of light passing through the cornea are obtained based on the positional ratio between the diameter of the retinal macular area and the diameter of the pupil. The incident angle at that position is derived by calculating the angle between the normal and the cornea at that position and the exit angle. Then, the distance between the position of the incident ray on the lens and the central axis is obtained by using the incident ray at that point and the distance from the rear surface of the lens to the cornea. The diameter of the optical functional area of ​​the lens is then calculated, mainly based on the formula.

[0024] =

[0025] Snell's Law: sinθ6 = *sinθ5

[0026] Where h1 is the height of the incident ray from the central axis of the cornea, h2 is the height of the macular region of the retina, v1 is the distance from the projection of the incident ray onto the central axis of the cornea to the intersection of the ray and the central axis of the eye, and v2 is the distance from the macular region of the retina to the intersection of the ray and the central axis of the eye. θ is the relative refractive index, θ6 is the incident angle, and θ5 is the exit angle.

[0027] On the lens 1 outside the optical functional area 2, there is a defocus lens area 3 with a ring structure. The defocus lens area 3 is composed of several concave lenses 4. The defocus lens is a concave lens, which facilitates the defocusing effect of the defocus concave lens so that when the light reaches the rear surface of the lens, it forms a fully covered processed light. Except for the correction area, the light that reaches the retina is processed light, forming an unclear image. Thus, the light falling on the retina is a virtual image. Since the retina cannot recognize the real image within the accommodation range, the problem of forced elongation of the eye axis is avoided.

[0028] like Figure 6 As shown, the method for calculating the radius of curvature of concave lens 4 is as follows: the plane diameter r of the defocus lens, the lens thickness, and the maximum distance L between adjacent defocus lenses need to be set according to the processing technology. Based on the condition that the light spots formed on the back surface of the lens are adjacent, the minimum negative lens defocus diopter required is calculated.

[0029] θ1 = θ2 + θ3 (Diagonal Principle)

[0030] L1=R1-r

[0031] tanθ3=L1 / t⇒θ3=arctan(L1 / t)

[0032] θ4=θ1

[0033] sinθ1= sinθ2⇒ sinθ2=sin(θ2+θ3)⇒ sinθ2=sinθ2cosθ3+cosθ2sinθ3⇒cotθ2=

[0034] R2=r / sinθ4

[0035] Wherein, n is the refractive index of the lens, r is the radius of the plane of the defocus lens, R1 is the radius of the light spot formed by the defocus lens on the back surface of the lens, R2 is the radius of curvature of the defocus lens, θ1 is the angle between the incident light and the normal of the defocus lens, θ2 is the angle between the refracted light and the normal of the defocus lens, θ3 is the angle between the refracted light and the incident light, θ4 is the angle between the center normal of the defocus lens and the edge normal, L1 is the difference between the radius of the refracted light spot and the radius of the plane of the defocus lens, and t is the thickness of the lens.

[0036] For example, the radius of the plane of the defocus lens r is 0.3 mm, the center distance of the lens is 0.7 mm, the thickness of the lens t is 3 mm, the refractive index of the lens is 1.5, the distance between the lens and the diagonal line of the lens is calculated to be 0.99 mm, and the radius of the light spot on the back surface of the lens after refraction through the front surface of the lens needs to reach R1=0.495 mm for the refracted light spot to cover the back surface of the lens. According to the above formula, L1=0.195 mm, θ3=3.7°, θ2=7.4°, θ1=11.1°, R2=1.55 mm, and the depth of the defocus lens with a plane radius of 0.3 mm is 0.029 mm.

[0037] The outer wall of the concave lens 4 is provided with a red light transmission coating 5, which can filter out part of other waveband light to increase the ratio of red light reaching the retina of the eye fundus, and at the same time reduce the light reaching the periphery of the retina. Few peripheral light changes dark vision and is not clear, forcing the glasses to view through the correction area to achieve better vision correction effect.

[0038] The red light transmission coating 5 can also be provided on the back side of the lens for filtering.

[0039] The defocus lens area 3 and the edge of the lens 1 are left with a gap, which is also called a transition area. The setting of the defocus lens area 3 will produce a blurred image, and the setting of the gap can reduce the abrupt transition with the main optical area, reduce the dizziness when wearing, and also facilitate the lens cutting and edging to ensure the accurate position of the defocus function area after the frame assembly.

[0040] The plane diameter of the concave lens 4 is less than 1 mm, the diopter of the concave lens 4 is less than -2.0, and the edge-to-edge spacing of the concave lens 4 is less than 0.6 mm. The smaller the gap between the concave lenses 4, the denser the defocus signal coverage, and the stronger the theoretical control effect, but it will also affect the light transmittance and visual comfort. It is necessary to avoid too small gap leading to diffraction effect (such as glare) or transition zone blur.

[0041] As shown in Figure 3 and Figure 4 The single-layer thickness of the red light transmission coating 5 is less than 81 nm. The red light transmission coating selectively reflects or absorbs specific wavelength light through the alternately stacked multiple layers of high / low refractive index materials based on the optical interference effect. The red light filtering coating can filter out part of the light, and the percentage of filtering out light of other wavelengths ranges from 1% to 100%, depending on the control needs and adaptability to determine the light filtering percentage, but the beneficial 630~650nm red light of the human eye can pass through completely. The red light transmission coating 5 allows the beneficial red light of wavelength 630~650nm to continuously stimulate the retinal pigment epithelial cells to secrete dopamine, improve the blood circulation of the fundus, increase the choroidal thickness of the posterior pole of the eye, and increase the oxygen content of the sclera, thereby strengthening the sclera to achieve the effect of inhibiting the abnormal growth of the eye axis. Moreover, the red light of this wavelength is derived from natural light, which is soft and has little stimulating effect on the human eye, and has high reliability.

[0042] The single-wavelength red light transmission coating attached to the surface of the lens filters out part of the light, making the light outside the optical functional area darker and not visible, forcing the line of sight to automatically pass through the optical functional area to view objects, and the vision correction effect is better. When the red light transmission coating 5 is made of a material with a refractive index n=2.0, such as TiO2, 650nm / 4 / 2.0=81nm.

[0043] The glasses made by the above-mentioned lens are convenient for effectively inhibiting the growth of the eye axis, achieving the purpose of preventing and controlling the occurrence and development of myopia.

Claims

1. A red light vision controlled lens comprising a lens (1), characterized in that: The lens (1) is provided with an optical function area (2) at the center, and the lens (1) outside the optical function area (2) is provided with a ring-shaped defocus lens area (3), the defocus lens area (3) is composed of a plurality of concave lenses (4), and the defocus lens area (3) is provided with a red light transmission coating (5).

2. The red light visibility controlled lens of claim 1, wherein: The optical function area (2) is located at the center of the lens (1), and the diameter of the optical function area (2) is 10-11mm.

3. The red light visual control lens of claim 1, wherein: The plane diameter of the concave lens (4) is less than 1mm, the diopter of the concave lens (4) is less than-2.0, and the edge distance of the concave lens (4) is less than 0.6mm.

4. The red light visibility controlled lens of claim 1, wherein: The light transmittance of the red light transmission coating (5) to the 630-650nm wave band light is between 80-100%.

5. The red light visual control lens of claim 1, wherein: There is no gap between the light spots formed on the rear surface of the lens after refraction by the concave lens (4).

6. The red light visibility controlled lens of claim 1, wherein: The single-layer thickness of the red light transmission coating (5) is less than 81nm.

7. An eyeglass comprising a lens, characterized in that, The lens is the vision control lens of any one of claims 1-6.

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