CN215678948U - Out-of-focus spectacle lens suitable for teenager myopia control - Google Patents
Out-of-focus spectacle lens suitable for teenager myopia control Download PDFInfo
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- CN215678948U CN215678948U CN202122050050.9U CN202122050050U CN215678948U CN 215678948 U CN215678948 U CN 215678948U CN 202122050050 U CN202122050050 U CN 202122050050U CN 215678948 U CN215678948 U CN 215678948U
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Abstract
The utility model discloses a defocusing spectacle lens suitable for teenager myopia control, wherein the optical center and the geometric center of the defocusing spectacle lens coincide; the central bright zone is an elliptical zone forming a first refractive zone for correcting ametropia; reducing the peripheral distance vision out-of-focus zone to include an annular elliptical region and a near nasal inward corridor region extending off-nose downward, surrounding the periphery of the first refractive region, forming a second refractive region for correcting peripheral distance vision defocus; the near out-of-focus area surrounds the periphery of the second dioptric area and is used for forming a third dioptric area of near out-of-focus at the periphery of the spectacle lens; and the cosmetic thin area surrounds the periphery of the third dioptric area and is used for reducing the peripheral thickness of the myopic spectacle lens to form a cosmetic thin fourth dioptric area. The utility model aims at the design of each area of the lens used in different habitual modes, and realizes the effects of inhibiting the lateral-central defocusing of the lens to the maximum extent and delaying the myopic deepening.
Description
Technical Field
The utility model relates to the technical field of myopia lenses, in particular to an out-of-focus lens suitable for juvenile myopia control.
Background
The frame glasses utilize the principle of reducing the side-center hyperopia defocusing or directly forming the peripheral myopic defocusing to inhibit the increase of the eye axis of the teenagers wearing the glasses, thereby achieving the purpose of delaying the myopic deepening, and the frame glasses are the technical scheme which is accepted in the industry at present. However, if the defocus amount of the designed lens is insufficient, a sufficient amount of myopic defocus cannot be formed, and the myopia control effect may be affected, and according to the optical rules of the existing lens design, if the defocus amount is relatively large, the astigmatism at the corresponding position is increased, and the increase of astigmatism is an important cause of discomfort in wearing, and even may not be applicable at all. At present, the design method of the lens using the micro-lens array to carry out multi-point defocusing solves the contradiction between the defocusing amount and the astigmatism, but the vision is continuously switched between two focuses, which can also cause the generation of uncomfortable conditions such as dizziness and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the out-of-focus spectacle lens which can effectively inhibit the growth of the ocular axis, has light and thin lens appearance and improves the wearing adaptability of the lens and is used for controlling the myopia of teenagers.
In order to achieve the above object, the technical solution of the present invention is to provide a defocus eyeglass lens suitable for teenager myopia control, comprising two refraction surfaces, wherein one of the refraction surfaces is a defocus design surface, and the optical center of the defocus design surface sequentially comprises a central bright visual area, a distance focus area for reducing peripheral far vision, a near distance focus area and a cosmetic thin area outwards;
the central bright visual area is an elliptical area formed by taking the optical center as the circle center, taking 8mm on the horizontal axis as the long axis and 6 mm on the vertical axis as the short axis, and the change of focal power of the central bright visual area is less than or equal to 0.12D;
the peripheral far-vision focus-reducing area is an annular area which surrounds the periphery of the central bright visual area and has an oval-like outer contour, the annular area comprises an annular oval area with a transverse axis of more than 8-20 mm and a longitudinal axis of more than 6-16 mm and a near nose side inward deflection corridor area which extends downwards at 5-15 degrees from the nose side, the vertical axis defocus compensation change rate in the annular oval area is 0.06D/mm-0.12D/mm, the transverse axis defocus compensation change rate is 75-85% of the longitudinal axis, and the transverse defocus compensation change rate in the near nose side inward deflection corridor area is 70-85% of the longitudinal axis;
the near-vision defocus area is an annular oval area which is surrounded at the periphery of the far-vision defocus area and reduces the peripheral far-vision defocus area, the outer contour of the near-vision defocus area is an annular oval area with the transverse axis being more than 20mm to 30 mm and the longitudinal axis being more than 16 mm to 24 mm, the defocus compensation change rate of the longitudinal axis in the near-vision defocus area is 0.12D/mm to 0.15D/mm, and the defocus compensation change rate of the transverse axis is 75 percent to 85 percent of that of the longitudinal axis;
the cosmetic thin area is the lens area surrounding the periphery of the near-vision focus-separating area.
The utility model provides a defocusing spectacle lens suitable for teenager myopia control, wherein the optical center of the spectacle lens coincides with the geometric center; the other surface of the spectacle lens is a spherical surface or a toroidal curved surface.
The defocused lens provided by the utility model forms a defocused correction area for reducing hyperopia at a position close to the center of the lens, and the defocused correction area comprises an oval shape with a longitudinal short axis of 16 mm and a transverse long axis of 20mm, and an inward inclined corridor extending downwards and towards the nose side is arranged at the lower half part reading area position which is easy to use when a human eye sees near, so that the normal rotating use range of the oblique object of the human eye is basically covered. Considering that human eyes are more sensitive to astigmatism when the area is used, the change rate of the focus compensation value of the lens is controlled to be 0.06-0.08D in a targeted mode, the focus is placed on forming the effect of reducing the lateral center hyperopia defocus, the effect of near-sightedness defocus is not intentionally pursued, and the discomfort risk caused by the rapid increase of astigmatism is reduced.
According to the utility model, the near-sighted defocus area is arranged outside the far-sighted defocus correcting area, the range of the near-sighted defocus area is an annular elliptical area with a longitudinal short axis of 16-24 mm and a transverse long axis of 20-30 mm, the defocus amount in the area is increased at a higher speed, and sufficient near-sighted defocus can be formed quickly. Because the number of the oblique objects to be seen by the eyes in the area is relatively small, the risk that discomfort is caused by the increase of astigmatism caused by the increase of the defocus compensation value is relatively low, so that the function of myopic defocus is increased, and the function of inhibiting the increase of the axis of the eyes of the lens is ensured.
In the outermost thin area of the lens, considering that the part of the area remained after the lens is cut and framed is limited to the most edge part on the temporal side in most cases, the visual optical functionality of wearing is not affected basically, therefore, the variation rate of the sagittal height can be accelerated to meet the requirement of thinner lens edge.
Compared with the prior art, the utility model has the beneficial effects that: the lens provided by the utility model adopts a multi-region combined structure, the lens inhibits the growth of the axis of the eye through defocusing compensation, the appearance of the lens is light and thin, and the adaptability of lens wearing is integrated, so that the functions of delaying the myopia and deepening of the lens are effectively exerted, the wearing comfort level and the lens wearing willingness of a lens wearer are enhanced, and the lens is suitable for myopia control of teenagers.
Drawings
Fig. 1 is a schematic structural diagram of an out-of-focus spectacle lens suitable for juvenile myopia control according to an embodiment of the present invention;
fig. 2 and 3 are graphs of diopter change in horizontal axis direction (x) and vertical axis direction (y) of the defocused spectacle lens provided in embodiment 1 of the present invention respectively;
FIG. 4 is a diagram of diopter change trends of an inward deviation corridor and a vertical longitudinal axis on the near nose side of the out-of-focus spectacle lens provided by embodiment 1 of the utility model;
FIG. 5 is a comparison graph of the astigmatism trend of the out-of-focus spectacle lens and the normal out-of-focus lens provided in example 2 of the present invention;
fig. 6 is a schematic view of the thinnest structure of the thinnest area of the out-of-focus spectacle lens and the common spherical lens provided in embodiment 3 of the present invention.
In the figure, 1, a central bright visual area; 2. reducing peripheral distance vision out-of-focus zones; 3. a near out-of-focus zone; 4. a cosmetic thin area; 5. optical center (lens geometric center); 6. near nasal lateral inward deviation corridor; 7. the utility model is a defocused lens; 8. comparative example spherical lenses.
Detailed Description
The technical solution of the present invention is further described with reference to the accompanying drawings and examples.
Example 1
Referring to fig. 1, the present embodiment provides a schematic structural diagram of an out-of-focus spectacle lens; as can be seen from fig. 1, it is a defocused spectacle lens of a functional zone structure, and the spectacle lens is composed of a central bright visual zone 1, a peripheral far-vision-reducing out-of-focus zone 2, a near-vision out-of-focus zone 3 and a cosmetic thin zone 4. The optical centre 5 coincides with the geometric centre of the spectacle lens.
The central bright visual area is an elliptic aspheric surface design with 8mm of a horizontal axis and 6 mm of a vertical axis, and the change of focal power from an optical center to any axial position is less than or equal to 0.12D.
The peripheral far-vision defocus reducing area is an annular area which surrounds the periphery of a central bright visual area and has an oval outer contour, the annular area comprises an annular oval area with a transverse axis larger than 8-20 mm and a longitudinal axis larger than 6-16 mm and a near nose side inward deflection corridor 6 area which extends downwards at 5-15 degrees from the nose side, the defocusing compensation change rate of the longitudinal axis in the annular oval area is 0.06D/mm-0.12D/mm, the defocusing compensation change rate of the transverse axis is 75-85% of the longitudinal axis, and the transverse defocusing compensation change rate in the near nose side inward deflection corridor area is 70-85% of the longitudinal axis.
The near-vision out-of-focus area is an annular elliptical area which is surrounded at the periphery of the far-vision out-of-focus area and has the outer contour of more than 20mm to 30 mm in the transverse axis and more than 16 mm to 24 mm in the longitudinal axis, the out-of-focus compensation change rate of the longitudinal axis in the near-vision out-of-focus area is 0.12D/mm to 0.15D/mm, and the out-of-focus compensation change rate of the transverse axis is 75 percent to 85 percent of the longitudinal axis.
The thickness-beautifying area is a design plane rise rapid change area, the edge thickness of the spectacle lens body is reduced, and the thickness is greatly reduced compared with a spherical lens with the same specification.
The defocused lens provided by the embodiment has a regional function structure, wherein the central bright area 1 surrounds the periphery of the optical center 5 to form a first refraction area for correcting ametropia; a reduced peripheral distance vision defocus area 2 surrounding the periphery of the first refractive region, forming a second refractive region for correcting peripheral distance vision defocus; a near out-of-focus zone 3 surrounding the periphery of the second dioptric zone for forming a third dioptric zone of near out-of-focus at the periphery of the spectacle lens; and the cosmetic thin area 4 surrounds the periphery of the third dioptric area and is used for reducing the peripheral thickness of the myopic spectacle lens to form a cosmetic thin fourth dioptric area.
In the functional zone structure of the lens, the central bright visual zone firstly forms an area for reducing the hyperopia defocusing correction zone which is an ellipse with a longitudinal short axis of 16 mm and a transverse long axis of 20mm at a position close to the center of the lens, and an inward deflection corridor extending downwards and towards the nose side is arranged at the lower half part reading zone position which is easy to use when the human eyes see near, so that the normal rotation use range of the oblique vision objects of the human eyes is basically covered. Considering that human eyes are more sensitive to astigmatism when the area is used, the change rate of the focus compensation value of the lens is controlled to be 0.06-0.08D in a targeted mode, the effect of reducing the lateral center hyperopia defocus is emphasized, the effect of near-sightedness defocus is not intentionally pursued, and the discomfort risk caused by the rapid increase of astigmatism is reduced.
Set up a myopia out-of-focus district outside reducing hyperopia out-of-focus correction district, its scope is 16 ~ 24 millimeters of longitudinal minor axis, and 20 ~ 30 millimeters of horizontal major axis are in the annular oval region, and the volume of defocus increase speed in the region is faster, can form the myopia out-of-focus of capacity rapidly. Because the inclined objects of the human eyes in the area are relatively less, the risk that discomfort is caused by the increase of astigmatism caused by the increase of the defocus compensation value is relatively lower, the function of myopic defocus is suitable to be improved, and the function of inhibiting the increase of the eye axis of the lens is ensured.
In the outermost thin area of the lens, considering that in most cases, the remaining part of the area after the lens is cut and framed is limited to the temporoside edge-most part and does not affect the visual optical functionality of wearing, the method further considers accelerating the sagittal height change rate and making the lens edge thinner.
According to the technical scheme, the embodiment provides the out-of-focus spectacle lens with-1.75D diopter, one surface of the spectacle lens body is a design surface, and the other surface of the spectacle lens body is a spherical surface or a toroidal surface, so that the spectacle lens is suitable for juvenile myopia control.
Referring to fig. 2 and 3, graphs of diopter change of the defocused spectacle lens provided by the present embodiment in the horizontal direction (x) and the vertical direction (y) are respectively shown; as can be seen from fig. 2, the diopter change of the central bright vision region does not exceed 0.12D; reducing the peripheral far-vision out-of-focus area, wherein the defocus amount in the horizontal axis direction is changed by 0.58D, and the average defocus amount per millimeter is changed by 0.05D, which is 83% of the defocus amount in the peripheral far-vision out-of-focus area on the vertical axis; the defocusing amount of the near-vision out-of-focus area changes by 0.96D, the average defocusing amount changes by 0.10D per millimeter, and the defocusing amount of the near-vision out-of-focus area is 83% of the defocusing amount of the near-vision out-of-focus area on the vertical axis. As can be seen from fig. 3, in the reduced peripheral far-focus distance range, the defocus amount in the longitudinal axis direction was changed to 0.60D, and the average change per mm was 0.06D, with the horizontal axis change amount being 83% of the vertical axis change amount. In the myopic defocus area, the defocus amount in the vertical axis direction is changed to 0.96D, the average change per millimeter is 0.12D, and the change amount of the horizontal axis in the myopic defocus area is 83% of that of the vertical axis.
Referring to fig. 4, a graph of diopter change trend between the inward deviation corridor on the near nose side and the vertical axis of the out-of-focus spectacle lens provided in this embodiment; as can be seen from fig. 4, the defocused spectacle lens has a vertical axis diopter change of 1.75D at the caliber of 20mm, and a near nose side inward corridor diopter change of 1.31D, which is a change amount of 74% of the vertical axis diopter change.
Example 2
The embodiment provides a defocused spectacle lens with diopter of-2.10D and defocusing amount of-1.15D, and the lens structure provided by the technical scheme of the embodiment 1 has the advantages that the back surface is a defocused design surface, and the front surface is an annular curved surface. The astigmatism variation curve of the out-of-focus spectacle lens provided by the embodiment is compared with that of the existing ordinary out-of-focus spectacle lens, and the result is shown in figure 5. As can be seen from fig. 5, compared with the variation trend curve of the conventional ordinary defocus astigmatic lens, the maximum astigmatism value of the lens of this embodiment is 1.08D, the maximum astigmatism value of the ordinary defocus astigmatic lens is 1.92D, and the total astigmatism variation trend of this embodiment is smaller than that of the ordinary lens. The utility model adopts the inward-biased corridor structure, so that the astigmatism of the defocusing lens is obviously reduced.
Example 3
In this embodiment, a lens with refractive index of 1.60 diopter of-6.00D and defocus amount of-1.20D is taken as an example, the curvature of the front surface of the lens is 1.0D, the curvature of the back surface of the lens is-7.0D, the front surface of the lens adopts the lens structure provided by embodiment 1, the front surface is a defocus design surface, and the back surface is a spherical surface; meanwhile, a common spherical surface prepared according to the prior art is taken as a comparative example, and the longitudinal thin structure of the cross section of the thin area is shown in the attached figure 6. As can be seen from FIG. 6, compared with the spherical lens 8 of the comparative example, the thickness of the defocus lens 7 at 35mm of the semi-aperture is 5.8740mm, the thickness of the spherical lens at 35mm of the semi-aperture is 7.6498mm, and the thickness of the lens of the present example is 1.7758mm thinner than that of the spherical lens at 35mm of the semi-aperture.
Claims (3)
1. An out-of-focus spectacle lens suitable for juvenile myopia control, comprising two refractive surfaces, characterized in that: one of the refraction surfaces is a defocusing design surface, and an optical center (5) of the defocusing design surface sequentially comprises a central bright visual area (1), a distance-focus area (2) for reducing peripheral far vision, a near-vision distance-focus area (3) and a cosmetic thin area (4) outwards;
the central bright visual area is an elliptical area formed by taking the optical center as the circle center, taking 8mm on the horizontal axis as the long axis and 6 mm on the vertical axis as the short axis, and the change of focal power of the central bright visual area is less than or equal to 0.12D;
the peripheral far-vision focus-reducing area is an annular area which surrounds the periphery of the central bright visual area and has an oval-like outer contour, and comprises an annular oval area with a transverse axis of more than 8-20 mm and a longitudinal axis of more than 6-16 mm and a near-use nose-side inward deflection corridor (6) area which extends downwards at 5-15 degrees from the nose side, the longitudinal axis defocus compensation change rate in the annular oval area is 0.06D/mm-0.12D/mm, the transverse axis defocus compensation change rate is 75-85% of the longitudinal axis, and the transverse defocus compensation change rate in the near-use nose-side inward deflection corridor area is 70-85% of the longitudinal axis;
the near-vision defocus area is an annular oval area which is surrounded at the periphery of the far-vision defocus area and reduces the peripheral far-vision defocus area, the outer contour of the near-vision defocus area is an annular oval area with the transverse axis being more than 20mm to 30 mm and the longitudinal axis being more than 16 mm to 24 mm, the defocus compensation change rate of the longitudinal axis in the near-vision defocus area is 0.12D/mm to 0.15D/mm, and the defocus compensation change rate of the transverse axis is 75 percent to 85 percent of that of the longitudinal axis;
the cosmetic thin area is the lens area surrounding the periphery of the near-vision focus-separating area.
2. The spectacle lens of claim 1 wherein said lens is selected from the group consisting of: the optical center and the geometric center of the spectacle lens coincide.
3. The spectacle lens of claim 1 wherein said lens is selected from the group consisting of: the other surface of the spectacle lens is a spherical surface or a toroidal curved surface.
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| CN202122050050.9U CN215678948U (en) | 2021-08-29 | 2021-08-29 | Out-of-focus spectacle lens suitable for teenager myopia control |
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| CN202122050050.9U CN215678948U (en) | 2021-08-29 | 2021-08-29 | Out-of-focus spectacle lens suitable for teenager myopia control |
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| CN215678948U true CN215678948U (en) | 2022-01-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935835A (en) * | 2022-04-29 | 2022-08-23 | 浙江伟星光学有限公司 | Novel defocusing polyurethane lens for inhibiting juvenile myopia |
| CN114994950A (en) * | 2022-07-11 | 2022-09-02 | 凯乐康医药科技有限公司 | Defocusing soft contact lens |
| CN115047648A (en) * | 2022-06-14 | 2022-09-13 | 苏州派视光学有限公司 | Myopia prevention and control out-of-focus lens and design method thereof |
| CN117111328A (en) * | 2023-10-08 | 2023-11-24 | 华创星瞳(北京)医学科技有限责任公司 | Adjustable high-precision myopia defocusing prevention and control glasses |
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2021
- 2021-08-29 CN CN202122050050.9U patent/CN215678948U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935835A (en) * | 2022-04-29 | 2022-08-23 | 浙江伟星光学有限公司 | Novel defocusing polyurethane lens for inhibiting juvenile myopia |
| CN114935835B (en) * | 2022-04-29 | 2023-09-22 | 浙江伟星光学股份有限公司 | Defocus polyurethane lens for inhibiting teenager myopia |
| CN115047648A (en) * | 2022-06-14 | 2022-09-13 | 苏州派视光学有限公司 | Myopia prevention and control out-of-focus lens and design method thereof |
| CN114994950A (en) * | 2022-07-11 | 2022-09-02 | 凯乐康医药科技有限公司 | Defocusing soft contact lens |
| CN117111328A (en) * | 2023-10-08 | 2023-11-24 | 华创星瞳(北京)医学科技有限责任公司 | Adjustable high-precision myopia defocusing prevention and control glasses |
| CN117111328B (en) * | 2023-10-08 | 2024-08-30 | 华创星瞳(北京)医学科技有限责任公司 | Adjustable high-precision myopia defocusing prevention and control glasses |
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