A reverse progressive multifocal control hyperopia lens

Abstract

The present invention relates to a reverse progressive multifocal control hyperopia lens. It solves the problem in the prior art that the far and near adjustment capabilities of progressive multifocal lenses are not good, affecting the use effect. It includes a lens body, the outer wall of the lens body has a lens surface layer, and the inner wall of the lens body has a lens inner layer. A far vision area is provided on the lens surface layer, and a near vision area is provided on the lens inner layer. A progressive multifocal adjustment layer is provided between the lens surface layer and the lens inner layer, and a refractive transition structure is provided on the progressive multifocal adjustment layer. The vertical center line of the far vision area and the vertical center line of the lens body are on the same axis, and the vertical center line of the near vision area is parallel to the vertical center line of the lens body. The advantages of the present invention are: the far and near switching is gentle, the increase of eye hyperopia is delayed, and the use effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of refractive lenses, and particularly to a reverse progressive multifocal control hyperopia lens. Background Art

[0002] Progressive multifocal lenses are also known as progressive lenses. As the name implies, there are multiple focal points on one lens. If classified by focal points, lenses can be divided into single-focal lenses, bifocal lenses, and multifocal lenses. The most common lens is the single-focal lens, which has only one diopter on the lens; the bifocal lens is a bifocal lens, and the multifocal lens has one diopter in the upper optical zone, one diopter in the lower optical zone, and many diopters in the transition zone, so it is called a progressive multifocal lens. The original intention of the design of progressive multifocal lenses is to provide a natural, convenient, and comfortable correction method for hyperopia patients. Wearing progressive glasses is like taking pictures with a camera. One pair of glasses can see clearly in the distance, up close, and also see medium-distance objects. Therefore, we also describe progressive lenses as "lenses that can zoom". After wearing them, one pair of glasses is equivalent to using multiple pairs of glasses. Currently, progressive multifocal lenses are gradually applied to control the development of myopia in teenagers. However, the existing progressive multifocal lens structure is complex, making it difficult to relieve eye fatigue, and it is difficult to correct the bad sitting postures and reading habits of teenagers; in addition, for the hyperopia population, the adjustment ability of the existing progressive multifocal lens for near and far is not good, and dizziness is likely to occur during the near and far switching, making it difficult to relieve eye hyperopia and affecting the use effect.

[0003] In order to solve the deficiencies of the existing technology, people have conducted long-term explorations and proposed various solutions. For example, a Chinese patent document discloses a soft shell feeding device for a cover machine [CN201721570702.9], in which the upper part of the lens is the distance vision area, the lower part is the near vision area, and the transition area is between the distance vision area and the near vision area. The geometric horizontal center line is set along the diameter of the lens, the geometric vertical center line is perpendicular to the geometric horizontal center line, the middle transition area is between the distance vision area and the near vision area, and the geometric vertical center line divides the middle transition area into two parts, namely the nasal transition area and the temporal transition area. Inside the nasal transition area or the temporal transition area, there are respectively the nasal progressive area or the temporal progressive area, and outside the nasal transition area or the temporal transition area, there are respectively the nasal astigmatism area or the temporal astigmatism area.

[0004] The above solution solves to a certain extent the problem that the existing progressive refractive lens is difficult to relieve eye fatigue and is difficult to correct bad sitting postures and reading habits, but this solution still has many deficiencies. For example, for the hyperopia population, the adjustment ability of the lens for near and far is not good, dizziness is likely to occur during the near and far switching, making it difficult to relieve eye hyperopia and affecting the use effect. Summary of the Invention

[0005] The object of the present invention is to provide a reverse progressive multifocal control hyperopia lens with reasonable design and good use effect in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A reverse progressive multifocal control hyperopia lens includes a lens body. The outer wall of the lens body has a lens surface layer, and the inner wall of the lens body has a lens inner layer. A distant vision area is provided on the lens surface layer, and a near vision area is provided on the lens inner layer. A progressive multifocal adjustment layer is provided between the lens surface layer and the lens inner layer, and a refractive transition structure is provided on the progressive multifocal adjustment layer. The vertical center line of the distant vision area and the vertical center line of the lens body are on the same axis, and the vertical center line of the near vision area is parallel to the vertical center line of the lens body. By providing a progressive multifocal adjustment layer between the lens surface layer and the lens inner layer, and providing a refractive transition structure in the progressive multifocal adjustment layer, when the wearer looks at a distant object through the lens body, the lens surface layer is made to be consistent with the diopter that the wearer needs to correct, so that the distant object can be clearly seen. When the wearer looks at a near object through the lens body, the diopter of the lens inner layer increases in the reverse direction compared with the corrected diopter, that is, the diopter is lower. At this time, the image of the object seen by the wearer through the lens inner layer will fall behind the retina, and at the same time, the accommodation power of the wearer is increased, inducing the elongation of the eye axis and delaying the increase of eye hyperopia, with good use effect.

[0007] In the above-mentioned reverse progressive multifocal control hyperopia lens, the refractive transition structure includes a plano layer horizontally provided in the middle of the progressive multifocal adjustment layer. On the side of the plano layer close to the lens inner layer, a distant light layer corresponding to the distant vision area is provided, and the focus of the distant light layer and the distant focus of the distant vision area are on the same axis. On the side of the plano layer close to the lens surface layer, a plurality of near light layers corresponding to the near vision area are provided, and the focus of the near light layer and the near focus of the near vision area are on the same axis. The distant light layer is used to correct the diopter of the wearer when looking at a distant object. When looking at a near object, the near light layer increases the diopter of the corrected diopter of the wearer in the reverse direction, making it equally clear to see both far and near.

[0008] In the above-mentioned reverse progressive multifocal control hyperopia lens, the focus of the distant light layer is located at the central position of the foci of a plurality of near light layers, that is, the longitudinal axes of the foci of the near light layers are circumferentially distributed along the longitudinal axis of the focus of the distant light layer, and the distance between the longitudinal axis of the focus of the near light layer and the longitudinal axis of the focus of the distant light layer is 2 - 4 MM. The diopter of the distant light layer on the progressive multifocal adjustment layer gradually increases from the plano layer towards the near vision area on the lens inner layer, and the diopter of the near light layer on the progressive multifocal adjustment layer gradually decreases from the plano layer towards the distant vision area on the lens surface layer. The diopter of the near light layer increases in the reverse direction relative to the diopter of the distant light layer, and there is a small distance between the focus of the distant light layer and the focus of the near light layer to avoid affecting the imaging effect of the lens body.

[0009] In the above-mentioned reverse progressive multifocal controlled hyperopia lens, the diopter measurement point of the distant vision area on the lens surface layer is located between 0 and 10 mm above the horizontal center line of the lens body, and the diopter measurement point of the near vision area on the inner layer of the lens is located between 7 and 15 mm below the horizontal center line of the lens body. Moreover, the diopter of the distant vision area is less than that of the near vision area, and the diopter of the near vision area is 0.25 - 10.00 D less than that of the distant vision area. A lower diopter is adopted in the near vision area, and a higher diopter is set in the distant vision area, so that when the wearer looks at distant and near objects, the imaging can be ensured to fall behind the retina, increasing the accommodation ability.

[0010] In the above-mentioned reverse progressive multifocal controlled hyperopia lens, the diameter of the plano layer in the progressive multifocal adjustment layer is the same as that of the progressive multifocal adjustment layer. The near light layer is specifically formed by superimposing three-layer structures. From the plano layer towards the lens surface layer, they are the near light axis layer, the near light center layer, and the near light outer layer in sequence. Near light refractive regions are provided in the near light axis layer, the near light center layer, and the near light outer layer, and the inner diameters of the near light refractive regions located on the near light axis layer, the near light center layer, and the near light outer layer increase in sequence. The structural setting of the near light layer can achieve the progressive imaging of the scene seen at close range.

[0011] In the above-mentioned reverse progressive multifocal controlled hyperopia lens, the far light layer is specifically formed by superimposing three-layer structures. From the plano layer towards the inner layer of the lens, they are the far light outer layer, the far light center layer, and the far light axis layer in sequence. Far light refractive regions are provided on the far light outer layer, the far light center layer, and the far light axis layer, and the inner diameters of the far light refractive regions on the far light outer layer, the far light center layer, and the far light axis layer decrease in sequence. The setting of the far light layer can achieve the progressive imaging of distant objects.

[0012] In the above-mentioned reverse progressive multifocal controlled hyperopia lens, the thicknesses of the near light axis layer, the near light center layer, and the near light outer layer gradually increase, and the thicknesses of the far light axis layer, the far light center layer, and the far light outer layer gradually increase.

[0013] In the above-mentioned reverse progressive multifocal controlled hyperopia lens, the near light diopter on the near light axis layer is greater than the far light diopter on the far light center layer, and the near light diopter on the near light center layer is greater than the far light diopter on the far light outer layer. Such a setting facilitates the reverse increase of the diopter when switching from looking at distant to near objects, without generating high and low jumps in the light intensity, enabling a smooth transition when the glasses are used for looking at distant and near objects.

[0014] In the above-mentioned reverse progressive multifocal controlled hyperopia lens, the range of the distant vision area is smaller than that of the near vision area, the range of the far light layer area is smaller than that of the near light layer area, and the effective refractive area of the near light layer is distributed circumferentially outside the far focus of the far light layer, and the effective refractive area of the far light layer is distributed circumferentially outside the near focus of the near light layer.

[0015] In the above-mentioned reverse progressive multifocal hyperopia control lens, the lens body is made of a thermosetting resin material, and its refractive index and Abbe number satisfy the conditions:

[0016] Refractive index 1.67 + Abbe number ≥ 30;

[0017] Or refractive index 1.60 + Abbe number ≥ 40;

[0018] Or refractive index 1.56 + Abbe number ≥ 38;

[0019] Or refractive index 1.50 + Abbe number ≥ 56;

[0020] Or, the lens body is made of a thermoplastic resin material, and its refractive index ≥ 1.58, and refractive index + Abbe coefficient ≥ 30.

[0021] Compared with the existing technology, the advantages of the present invention are as follows: reasonable design, convenient to use. When the wearer looks far through the lens body, the diopter of the far-viewing area is corrected by the far-viewing layer and is consistent with the diopter that the wearer needs to correct, and the wearer can clearly see distant objects. When the wearer looks near through the lens body, the diopter of the inner layer of the lens is increased in reverse through the near-light layer 53 compared with the corrected diopter, that is, the diopter is lower. At this time, the image of the object seen by the wearer through the inner layer of the lens will fall behind the retina, and at the same time, the adjustment ability of the wearer is increased, inducing the elongation of the eye axis and delaying the increase of eye hyperopia, with good use effect; at the same time, there is a small distance between the focus of the far-light layer and the focus of the near-light layer, which can effectively prevent the influence on the imaging effect of the lens body. Brief Description of the Drawings

[0022] Figure 1 is an exploded view of the lens body in the present invention;

[0023] Figure 2 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 3 is an exploded view of the near-light layer in the present invention;

[0025] Figure 4 is an exploded view of the far-light layer in the present invention;

[0026] Figure 5 is a schematic diagram of the focal length positions of the far-viewing area, far-light layer, near-viewing area, and near-light layer in the present invention.

[0027] In the figure, there are lens body 1, lens surface layer 2, distant vision area 21, lens inner layer 3, near vision area 31, progressive multifocal adjustment layer 4, refractive transition structure 5, plano layer 51, distant light layer 52, outer distant light layer 521, central distant light layer 522, axial distant light layer 523, distant light refractive area 524, near light layer 53, axial near light layer 531, central near light layer 532, outer near light layer 533, and near light refractive area 534. Detailed implementation mode

[0028] The following further elaborates on the present invention in conjunction with the attached drawings and specific implementation modes.

[0029] As Figures 1-5 shown, a reverse progressive multifocal control hyperopia lens includes a lens body 1. The outer wall of the lens body 1 has a lens surface layer 2, and the inner wall of the lens body 1 has a lens inner layer 3. A distant vision area 21 is provided on the lens surface layer 2, and a near vision area 31 is provided on the lens inner layer 3. A progressive multifocal adjustment layer 4 is provided between the lens surface layer 2 and the lens inner layer 3, and a refractive transition structure 5 is provided on the progressive multifocal adjustment layer 4. The vertical center line of the distant vision area 21 and the vertical center line of the lens body 1 are on the same axis, and the vertical center line of the near vision area 31 and the vertical center line of the lens body 1 are parallel to each other. When in use, the refractive transition structure 5 provided in the progressive multifocal adjustment layer 4 corrects the hyperopia diopter and increases the diopter of the corrected hyperopia diopter in the reverse direction, enabling the wearer to see clearly both at a distance and up close, and making the switching between seeing at a distance and up close smoother, reducing the discomfort caused by a large jump in diopters, improving the use comfort, and delaying the increase of hyperopia.

[0030] Among them, the refractive transition structure 5 includes a plano layer 51 horizontally arranged in the middle of the progressive multifocal adjustment layer 4. On the side of the plano layer 51 close to the lens inner layer 3, there is a distant light layer 52 corresponding to the distant vision area 21, and the focus of the distant light layer 52 and the distant focus of the distant vision area 21 are on the same axis. On the side of the plano layer 51 close to the lens surface layer 2, there are several near light layers 53 corresponding to the near vision area 31, and the focus of the near light layer 53 and the near focus of the near vision area 31 are on the same axis. The near light layer 53 is used to increase the diopter direction of the corrected diopter, and the distant light layer 52 is used to correct the hyperopia diopter of the wearer.

[0031] Visibly, the focus of the far - light layer 52 is located at the central position of the foci of several near - light layers 53, that is, the longitudinal axes of the foci of the near - light layers 53 are circumferentially distributed along the longitudinal axis of the focus of the far - light layer 52, and the distance between the longitudinal axis of the focus of the near - light layer 53 and the longitudinal axis of the focus of the far - light layer 52 is 2 - 4 mm. The diopter of the far - light layer 52 on the progressive multifocal adjustment layer 4 gradually increases from the plano - lens layer 51 towards the direction close to the near - vision area 31 on the lens inner layer 3, and the diopter of the near - light layer 53 on the progressive multifocal adjustment layer 4 gradually decreases from the plano - lens layer 51 towards the direction close to the far - vision area 21 on the lens surface layer 2. The foci of the far - light layer 52 and the near - light layer 53 are parallel to each other and there is a focusing gap between them, and the imaging when looking far and near is not affected.

[0032] Further, the diopter measurement point of the far - vision area 21 on the lens surface layer 2 is located between 0 - 10 mm above the horizontal center line of the lens body 1, and the diopter measurement point of the near - vision area 31 on the lens inner layer 3 is located between 7 - 15 mm below the horizontal center line of the lens body 1. And the diopter of the far - vision area 21 is less than that of the near - vision area 31, and the diopter of the near - vision area 31 is 0.25 - 10.00 D less than that of the far - vision area. The near - vision area 31 adopts a lower diopter for the adjustment of the diopter direction when looking at nearby objects.

[0033] Obviously, the diameter of the plano - lens layer 51 in the progressive multifocal adjustment layer 4 is the same as the diameter of the progressive multifocal adjustment layer 4. The near - light layer 53 is specifically formed by superimposing three layers of structures. From the plano - lens layer 51 towards the lens surface layer 2, they are the near - light axis layer 531, the near - light center layer 532, and the near - light outer layer 533 in sequence. Near - light refractive regions 534 are provided in the near - light axis layer 531, the near - light center layer 532, and the near - light outer layer 533, and the inner diameters of the near - light refractive regions 534 on the near - light axis layer 531, the near - light center layer 532, and the near - light outer layer 533 increase in sequence.

[0034] Specifically, the far - light layer 52 is specifically formed by superimposing three layers of structures. From the plano - lens layer 51 towards the lens inner layer 3, they are the far - light outer layer 521, the far - light center layer 522, and the far - light axis layer 523 in sequence. Far - light refractive regions 524 are provided on the far - light outer layer 521, the far - light center layer 522, and the far - light axis layer 523, and the inner diameters of the far - light refractive regions 524 on the far - light outer layer 521, the far - light center layer 522, and the far - light axis layer 523 decrease in sequence.

[0035] Furthermore, the thicknesses of the near - light axis layer 531, the near - light center layer 532, and the near - light outer layer 533 gradually increase, and the thicknesses of the far - light axis layer 523, the far - light center layer 522, and the far - light outer layer 521 gradually increase. The diopter adopts a progressive adjustment to enhance the smoothness of the visual far - and - near movement and improve the comfort of use.

[0036] More specifically, the near - light diopter on the near - light axis layer 531 is greater than the far - light diopter on the far - light center layer 522, and the near - light diopter on the near - light center layer 532 is greater than the far - light diopter on the far - light outer layer 521.

[0037] Specifically, the range of the far - vision area 21 is smaller than the range of the near - vision area 31, the area range of the far - light layer 52 is smaller than the area range of the near - light layer 53, and the effective refractive area of the near - light layer 53 is circumferentially distributed outside the far - focus of the far - light layer 52, and the effective refractive area of the far - light layer 52 is circumferentially distributed outside the near - focus of the near - light layer 53.

[0038] Preferably, the lens body 1 is made of a thermosetting resin material, and its refractive index and Abbe number meet the conditions:

[0039] Refractive index 1.67+Abbe number ≥ 30;

[0040] Or refractive index 1.60+Abbe number ≥ 40;

[0041] Or refractive index 1.56+Abbe number ≥ 38;

[0042] Or refractive index 1.50+Abbe number ≥ 56;

[0043] Or, the lens body 1 is made of a thermoplastic resin material, and its refractive index ≥ 1.58, and refractive index + Abbe coefficient ≥ 30. Both thermosetting resin materials and thermoplastic resin materials can be set with different refractive indices and Abbe coefficients according to needs.

[0044] In summary, the principle of this embodiment is as follows: When wearing this lens body 1 to view far objects, the far - light layer in the refractive transition structure 5 corrects the hyperopic diopter that needs to be corrected for the wearer. After passing through the far - vision area, the wearer can clearly see the distant object without a picture. When viewing near objects, the near - vision layer in the refractive transition structure 5 reversely increases the hyperopic diopter that needs to be corrected, making the diopter lower after passing through the near - vision area. At this time, the near - object viewed by the wearer forms an image behind the retina after passing through the near - vision area, inducing the eye axis to elongate, effectively delaying the increase of the wearer's eye hyperopia.

[0045] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0046] Although terms such as lens body 1, lens surface layer 2, distance vision area 21, lens inner layer 3, near vision area 31, progressive multifocal adjustment layer 4, refractive transition structure 5, plano layer 51, distance light layer 52, distance light outer layer 521, distance light center layer 522, distance light axis layer 523, distance light refractive area 524, near light layer 53, near light axis layer 531, near light center layer 532, near light outer layer 533, near light refractive area 534, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A reverse progressive multifocal control hyperopia lens, comprising a lens body (1), the outer wall of the lens body (1) has a lens surface layer (2), and the inner wall of the lens body (1) has a lens inner layer (3). It is characterized in that a distant vision area (21) is provided on the lens surface layer (2), and a near vision area (31) is provided on the lens inner layer (3). An progressive multifocal adjustment layer (4) is provided between the lens surface layer (2) and the lens inner layer (3), and a refractive transition structure (5) is provided on the progressive multifocal adjustment layer (4). The vertical center line of the distant vision area (21) and the vertical center line of the lens body (1) are on the same axis, and the vertical center line of the near vision area (31) is parallel to the vertical center line of the lens body (1). The refractive transition structure (5) includes a plano-convex layer (51) provided in the middle of the progressive multifocal adjustment layer (4) and arranged horizontally. On the side of the plano-convex layer (51) close to the lens inner layer (3), a distant light layer (52) corresponding to the distant vision area (21) is provided, and the focus of the distant light layer (52) and the distant focus of the distant vision area (21) are on the same axis. On the side of the plano-convex layer (51) close to the lens surface layer (2), a plurality of near light layers (53) corresponding to the near vision area (31) are provided, and the focus of the near light layer (53) and the near focus of the near vision area (31) are on the same axis.

2. A reverse progressive multifocal control hyperopia lens according to claim 1, It is characterized in that the focus of the distant light layer (52) is located at the center position of the foci of a plurality of near light layers (53), that is, the longitudinal axis of the focus of the near light layer (53) is circumferentially distributed along the longitudinal axis of the focus of the distant light layer (52), and the distance between the longitudinal axis of the focus of the near light layer (53) and the longitudinal axis of the focus of the distant light layer (52) is 2-4 mm. The diopter of the distant light layer (52) on the progressive multifocal adjustment layer (4) gradually increases from the plano-convex layer (51) towards the near vision area (31) on the lens inner layer (3), and the diopter of the near light layer (53) on the progressive multifocal adjustment layer (4) gradually decreases from the plano-convex layer (51) towards the distant vision area (21) on the lens surface layer (2).

3. A reverse progressive multifocal control hyperopia lens according to claim 2, It is characterized in that the diopter measurement point of the distant vision area (21) on the lens surface layer (2) is located between 0-10 mm above the horizontal center line of the lens body (1), and the diopter measurement point of the near vision area (31) on the lens inner layer (3) is located between 7-15 mm below the horizontal center line of the lens body (1). The diopter of the distant vision area (21) is less than the diopter of the near vision area (31), and the diopter of the near vision area (31) is 0.25-10.00 D less than the diopter of the distant area.

4. A reverse progressive multifocal control hyperopia lens according to claim 1, It is characterized in that The diameter of the plano layer (51) in the progressive multifocal adjustment layer (4) is the same as that of the progressive multifocal adjustment layer (4). The near-light layer (53) is specifically formed by superimposing three layers. In the direction from the plano layer (51) towards the lens surface layer (2), they are the near-light axis layer (531), the near-light center layer (532), and the near-light outer layer (533) in sequence. Near-light refractive regions (534) are provided in the near-light axis layer (531), the near-light center layer (532), and the near-light outer layer (533), and the inner diameters of the near-light refractive regions (534) on the near-light axis layer (531), the near-light center layer (532), and the near-light outer layer (533) increase in sequence.

5. A reverse progressive multifocal control hyperopia lens according to claim 4, characterized in that the far-light layer (52) is specifically formed by superimposing three layers. In the direction from the plano layer (51) towards the lens inner layer (3), they are the far-light outer layer (521), the far-light center layer (522), and the far-light axis layer (523) in sequence. Far-light refractive regions (524) are provided on the far-light outer layer (521), the far-light center layer (522), and the far-light axis layer (523), and the inner diameters of the far-light refractive regions (524) on the far-light outer layer (521), the far-light center layer (522), and the far-light axis layer (523) decrease in sequence.

6. A reverse progressive multifocal control hyperopia lens according to claim 5, characterized in that the thicknesses of the near-light axis layer (531), the near-light center layer (532), and the near-light outer layer (533) gradually increase, and the thicknesses of the far-light axis layer (523), the far-light center layer (522), and the far-light outer layer (521) gradually increase.

7. A reverse progressive multifocal control hyperopia lens according to claim 6, characterized in that the near-light diopter on the near-light axis layer (531) is greater than the far-light diopter on the far-light center layer (522), and the near-light diopter on the near-light center layer (532) is greater than the far-light diopter on the far-light outer layer (521).

8. A reverse progressive multifocal control hyperopia lens according to claim 1, characterized in that the range of the distant vision area (21) is smaller than the range of the near vision area (31), the area range of the far-light layer (52) is smaller than the area range of the near-light layer (53), and the effective refractive area of the near-light layer (53) is distributed circumferentially outside the far focus of the far-light layer (52), and the effective refractive area of the far-light layer (52) is distributed circumferentially outside the near focus of the near-light layer (53).

9. A reverse progressive multifocal control hyperopia lens according to claim 1, characterized in that the lens body (1) is made of a thermosetting resin material, and its refractive index and Abbe number satisfy the conditions: refractive index 1.67 + Abbe number ≥ 30; or refractive index 1.60 + Abbe number ≥ 40; or refractive index 1.56 + Abbe number ≥ 38; or refractive index 1.50 + Abbe number ≥ 56; Alternatively, the lens body (1) is made of a thermoplastic resin material, and its refractive index ≥ 1.58, and refractive index + Abbe number ≥ 30.

Images