CN215264271U

CN215264271U - Lens capable of reducing side-center defocusing

Info

Publication number: CN215264271U
Application number: CN202121836497.2U
Authority: CN
Inventors: 冯涛; 陈晓翌; 余浩墨
Original assignee: Jiangsu Mingshi Optical Technology Co ltd; Suzhou Mingshi Optical Technology Co ltd
Current assignee: Jiangsu Mingshi Optical Technology Co ltd; Suzhou Mingshi Optical Technology Co ltd
Priority date: 2021-08-08
Filing date: 2021-08-08
Publication date: 2021-12-21
Anticipated expiration: 2031-08-08

Abstract

The utility model discloses a side-center reducing out-of-focus spectacle lens, which is provided with a refraction surface which is a side-center reducing out-of-focus design surface comprising a bright visual area and an out-of-focus compensation area; the bright visual area is an elliptical area formed by taking the caliber of 12 mm in the horizontal direction as a long axis and the caliber of 10 mm in the vertical direction as a short axis; the defocusing compensation area is an elliptical annular area formed by taking a caliber of 60 mm in the horizontal direction outside the photopic vision area as a long axis and taking a caliber of 50 mm in the vertical direction as a short axis; the average diopter variation and the astigmatism of the bright visual area and the defocus compensation area are distributed in an elliptic radial manner from the optical center to the periphery; the astigmatism is less than or equal to the variation of the average diopter. The lens can reduce the astigmatic interference caused by overlarge defocus compensation in the horizontal direction and the vertical direction while satisfying the hyperopic defocus correction in different areas of the horizontal direction and the vertical direction of the retina of a teenager myopia patient, reduce the peripheral vertigo feeling after wearing the lens, and improve the wearing comfort level of the teenager patient.

Description

Lens capable of reducing side-center defocusing

Technical Field

The utility model relates to a myopia lens technical field specifically is a myopia lens that the luminosity profile oval distribution of reducing other center out of focus that restraines teenager's axis of the eye increases.

Background

In recent years, the incidence rate of myopia of teenagers in China is increasing continuously, and the number of myopia people in China reaches 6 hundred million at present according to the latest research report of the world health organization. According to statistics, the myopia rates of the primary school, the middle school and the school are respectively as follows: 45.7 percent of pupils, 74.4 percent of junior high school students, 83.3 percent of senior high school students and 87.7 percent of college students, the myopia rate of teenagers is high and is the first in the world, the myopia phenomenon of the teenagers in China is low in age in recent years, the myopia rate is gradually increased year by year, and the myopia becomes one of the outstanding problems harming the health of the students in China. How to inhibit the occurrence and development of myopia of teenagers is urgent.

Recent studies have shown that abnormal growth of the ocular axis is one of the main factors inducing the progression of myopia, which is characterized in that after an object image passes through a refractive correction lens, a central object image is shown in the fovea of the macula of the retina, a peripheral object image is shown behind the retina (i.e. a hyperopic defocusing state), and after a long-time peripheral object image is shown on the retina, the physical development function of children can force the peripheral object image to be shown on the retina, so that the ocular axis grows further, and the myopia is further progressed. Research and clinical verification prove that by wearing the frame glasses with the design of reducing the lateral central defocus, the central area of the lens has the function of correcting ametropia, and the peripheral defocus design of the lens enables objects around the retina to be in a near-sighted defocus state, so that the increase of the axis of the eye is inhibited, and the myopia is prevented from deepening.

Because the field of vision scope of people has the physiological characteristic that horizontal field of vision is wider than vertical field of vision, under most circumstances, people's eye is higher to the requirement in left and right field of vision, and vertical then glance scope is less relatively, consequently in reducing other center out of focus design, need carry out differentiation design to horizontal, vertical out of focus compensation, be favorable to promoting wearing comfort level and horizontal, vertical out of focus compensation effect. However, clinical data also show that astigmatism existing around the spectacle lens is a main factor causing discomfort in wearing, so that excessive astigmatism must exist in the decentration compensation design. For example, chinese utility model patent CN210136372U "a spectacle lens for teenagers capable of forming peripheral myopic defocus" discloses a spectacle lens adopting a reduced side center defocus design with elliptic refractive profile distribution, wherein the horizontal astigmatism of the spectacle lens at 20 mm aperture, 30 mm aperture, 40 mm aperture, 50 mm aperture and 60 mm aperture respectively accounts for 92%, 93%, 92%, 85% and 75% of the average diopter change at the same position; the astigmatism of 20 mm caliber, 30 mm caliber, 40 mm caliber, 50 mm caliber and 60 mm caliber in the vertical direction respectively accounts for 109%, 112%, 110%, 108% and 104% of the average diopter change of the same position; obviously, in the reduced side-center out-of-focus lens with the elliptic distribution of the refractive profile, the proportion of astigmatism in the vertical direction relative to the average diopter compensation value is obviously higher than that in the horizontal direction, because of the non-Turkley design of the elliptic distribution, the higher astigmatism is superposed with the normal astigmatism brought by the original defocus design, so that the astigmatism problem in the vertical direction is more prominent than that of a lens designed in a rotational symmetry mode, if the diopter change of the 40 mm caliber in the horizontal direction and the vertical direction is respectively 1.30D and 1.50D, the equivalent position astigmatism would be 1.24D horizontally and 1.65D vertically, which obviously would cause discomfort to the wearer, even due to excessive peripheral astigmatism, may adversely affect compliance with juvenile lens wear, thereby impairing the final function of the lens and affecting the corrective effect of hyperopic defocus. In order to solve the problems in the prior art, a new technical solution for elliptical distribution of the refractive profile is needed.

Disclosure of Invention

The utility model discloses not enough to prior art exists, provide the other center out of focus lens of reduction that each direction astigmatism optimized respectively for oval distribution, can effectively reduce wear the peripheral dizzy sense that the astigmatism that leads to because of too big peripheral out of focus compensation produced behind the mirror disturbs, improve and wear the mirror comfort level.

The technical scheme for realizing the purpose of the utility model is to provide a side-center reducing out-of-focus spectacle lens, which comprises two refraction surfaces, wherein at least one refraction surface is a side-center reducing out-of-focus design surface, and the side-center reducing out-of-focus design surface comprises a bright visual area and an out-of-focus compensation area; the bright visual area is an elliptical area range formed by taking a caliber of 12 mm in the horizontal direction as a long axis and a caliber of 10 mm in the vertical direction as a short axis; the defocusing compensation area is an elliptical annular area range formed by taking the caliber of 60 mm in the horizontal direction outside the photopic vision area as a long axis and taking the caliber of 50 mm in the vertical direction as a short axis; the average diopter variation and the astigmatism of the bright visual area and the defocus compensation area are distributed in an elliptic radial manner from the optical center to the periphery; the astigmatism of each position in the horizontal direction is less than or equal to the average diopter variation in the horizontal direction, the astigmatism of each position in the vertical direction is less than or equal to the average diopter variation in the vertical direction, and the astigmatism of each position in the horizontal direction corresponds to 65%, 55%, 50%, 45% and 40% of the average diopter variation in the horizontal direction of the same position in the positions of 20 mm caliber, 30 mm caliber, 40 mm caliber, 50 mm caliber and 60 mm caliber respectively; the vertical astigmatism amounts correspond to 90%, 86%, 84%, 80%, and 75% of the vertical average diopter change amount, respectively.

The utility model provides a reduce other center out of focus lens, be equipped with horizontal direction out of focus offset value measuring point and vertical direction out of focus offset value measuring point respectively in the out of focus compensation district, be located optics center horizontal direction and vertical direction 40 millimeters bore position respectively; the diopter variation at the measuring point in the horizontal direction is 0.80D-2.50D, the diopter variation at the measuring point in the vertical direction is 0.90D-3.00D, and D is a diopter unit.

The utility model provides a reduce other center out of focus lens, reduce the average diopter variation of the horizontal direction of other center out of focus design face, the horizontal direction is from the optical center to be the even change of accelerating in being less than or equal to 12 millimeters bore, be more than 12 millimeters bore to be the uniform change of uniform velocity in being less than or equal to 50 millimeters bore, be more than 50 millimeters bore and be the even change of decelerating; reducing the average diopter variation in the vertical direction of the off-focus design surface at the side center, wherein the average diopter variation in the vertical direction from the optical center to the caliber less than or equal to 10 mm is uniform in acceleration variation, the average diopter variation in the vertical direction from the caliber more than 10 mm to the caliber less than or equal to 50 mm is uniform in variation, and the average diopter variation in the vertical direction from the optical center to the caliber more than or equal to 50 mm is uniform in deceleration variation; reducing the astigmatism of the lateral center defocusing design surface in the horizontal direction, wherein the horizontal direction is uniformly accelerated from the optical center to the caliber which is less than or equal to 12 mm, is uniformly accelerated from the caliber which is more than 12 mm to the caliber which is less than or equal to 40 mm, is uniformly decelerated from the caliber which is more than 40 mm to the caliber which is less than or equal to 50 mm, and is in a stable state from the caliber which is more than 50 mm; reducing the vertical direction astigmatism of the off-center defocusing design surface, wherein the vertical direction is uniformly accelerated from the optical center to the caliber less than or equal to 10 mm, uniform speed change from the caliber more than 10 mm to the caliber less than or equal to 50 mm, and uniform decelerated change and gradual steady state from the caliber more than 50 mm.

The utility model provides a pair of reduce other center out of focus lens, another refracting surface of its lens is one of sphere, astigmatic face, two plain noodles, progressive multiple focal plane, multiple spot out of focus structural plane.

The utility model provides a pair of reduce other center out of focus lens, for the myopia lens.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a pair of other center out of focus lens of reduction through astigmatism optimization, the average diopter trend of change that has horizontal direction and vertical direction optimizes and the characteristics that the trend of astigmatism change is optimized, can effectively reduce the horizontal direction that leads to because of the particularity of non-Turkli design and the astigmatism outstanding problem of vertical direction, reduce the astigmatism interference of wearing the back because of too big peripheral out of focus compensation leads to of wearing the mirror, thereby reduce the peripheral vertigo sense of wearing the back of the mirror, improve teenagers' patient and wear lens comfort level and compliance.

Drawings

Fig. 1 is a schematic structural diagram of a spectacle lens for reducing lateral center defocus according to an embodiment of the present invention;

fig. 2 and 3 are graphs of the average diopter variation and the astigmatism of the side-center out-of-focus spectacle lens in the horizontal direction and the vertical direction respectively, which are provided by the embodiment of the present invention and are designed for reducing the amount of change;

figures 4 and 5 are horizontal and vertical refractive and astigmatic profiles, respectively, of a decentered spectacle lens of the prior art reduced design.

In the figure, 1. optical center; 2. a bright visual field; 3. a defocus compensation area; 4. a defocusing compensation value measuring point in the horizontal direction; 5. and measuring points of the defocus compensation value in the vertical direction.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments.

Example 1

The lens for reducing the lateral center defocusing comprises a lens body, wherein the lens body consists of two refraction surfaces, and at least one refraction surface is a design surface for reducing the lateral center defocusing.

Referring to fig. 1, a schematic structural diagram of a design refractive surface for reducing off-center defocus in the spectacle lens provided in this embodiment is shown, where the off-center defocus design surface includes a bright visual area 2 and a defocus compensation area 3, the bright visual area is an elliptical area range formed by taking a 12 mm caliber in the horizontal direction, i.e., in the x-axis direction, of an optical center 1 as a long axis and a 10 mm caliber in the vertical direction, i.e., in the y-axis direction, as a short axis; the defocusing compensation area is an elliptical annular area range formed by taking a caliber of 60 mm in the horizontal direction outside the photopic vision area as a long axis and taking a caliber of 50 mm in the vertical direction as a short axis. A defocusing compensation value measuring point 4 in the horizontal direction and a defocusing compensation value measuring point 5 in the vertical direction are respectively arranged in the defocusing compensation area and are respectively positioned at the aperture positions of 40 mm in the horizontal direction and the vertical direction of the optical center 1; the diopter variation at the measuring point in the horizontal direction is 0.80D-2.50D, the diopter variation at the measuring point in the vertical direction is 0.90D-3.00D, and D is a diopter unit.

The average diopter variation and the astigmatism of the side-center defocus design surface bright visual area and the defocus compensation area are distributed in an elliptic radial manner from the optical center 1 to the periphery; the astigmatism of each position in the horizontal direction is less than or equal to the average diopter variation in the horizontal direction, the astigmatism of each position in the vertical direction is less than or equal to the average diopter variation in the vertical direction, and the astigmatism of each position in the horizontal direction corresponds to 65%, 55%, 50%, 45% and 40% of the average diopter variation in the horizontal direction of the same position in the positions of 20 mm caliber, 30 mm caliber, 40 mm caliber, 50 mm caliber and 60 mm caliber respectively; the vertical astigmatism amounts correspond to 90%, 86%, 84%, 80%, and 75% of the average diopter change amount in the same vertical direction, respectively.

The spectacle lens provided by the embodiment is a myopia spectacle lens. The diopter variation of the 40 mm caliber in the horizontal direction of the spectacle lens body is 1.0D-1.8D, the 40 mm caliber in the vertical direction is 1.2D-2.0D, and D is a diopter unit.

One of the refraction surfaces of the spectacle lens body is an elliptical design surface for reducing the side center defocusing, and the other refraction surface can be designed into a spherical surface, a diffusing surface, a double-smooth surface, a progressive multi-focus surface and a multi-point defocusing structure surface.

In this embodiment, an elliptic side center out-of-focus spectacle lens with a correction luminosity of-2.00D is taken as an example, and the horizontal direction average diopter variation (out-of-focus compensation value) is 1.06D (as shown in fig. 2), and the vertical direction average diopter variation (out-of-focus compensation value) is 1.26D (as shown in fig. 3); the horizontal direction, vertical direction average diopter variation and astigmatism curves of the designed decentered spectacle lens are respectively shown in fig. 2 and 3.

Referring to fig. 2, the horizontal 12 mm caliber range of the design surface is a transverse photopic vision area, the caliber exceeding 12 mm is a side-center defocus compensation area, and the average diopter change trends are respectively: the average diopter change within 12 mm or less is uniform acceleration change, the average diopter change from greater than 12 mm caliber to less than or equal to 50 mm caliber is uniform speed change, and the average diopter change over 50 mm caliber is uniform deceleration change. The horizontal astigmatism trend is that the change in the diameter of more than 12 mm is the same as the average diopter change, the diameter of more than 12 mm to less than 40 mm is the uniform speed change, the diameter of more than 40 mm to less than 50 mm is the uniform speed change, and the astigmatism change tends to be in a stable state when the diameter of more than 50 mm exceeds the diameter of 50 mm, and the astigmatism change respectively does not exceed 65%, 60%, 55%, 50% and 45% of the average diopter change at the same position when the diameter of 20 mm, the diameter of 30 mm, the diameter of 40 mm, the diameter of 50 mm and the diameter of 60 mm.

Referring to fig. 3, the design surface has a longitudinal photopic vision area within a 10 mm caliber range in the vertical direction, a lateral central defocus compensation area over 10 mm caliber, a uniform acceleration change in a vertical direction average diopter change trend within a caliber of 10 mm or less, a uniform speed change from a caliber of 10 mm or more to a caliber of 50 mm or less, and a uniform deceleration change over a caliber of 50 mm. The astigmatism variation trend in the vertical direction is that the variation in the caliber of less than or equal to 10 mm is the same as the variation of average diopter, the variation from the caliber of more than 10 mm to the caliber of less than or equal to 50 mm is the uniform variation, the astigmatism variation exceeds the caliber of 50 mm, the astigmatism variation is uniform deceleration variation and gradually tends to a stable state, and the astigmatism variation does not exceed 90%, 86%, 84%, 80% and 75% of the variation of the average diopter at the same position respectively in the calibers of 20 mm, 30 mm, 40 mm, 50 mm and 60 mm.

The technical proposal disclosed in Chinese utility model CN210136372U < A spectacle lens for teenagers capable of forming peripheral myopic defocus > is used as a comparative example to manufacture elliptic side center defocus spectacle lenses with the same luminosity, see attached 4 and 5, which are respectively the graphs of the mean refraction variation and the astigmatism of the spectacle lens in the horizontal direction and the vertical direction; with the lens provided in this embodiment, the defocus compensation values (i.e. average refractive change) and astigmatism values in the horizontal direction and the vertical direction of the lens with 20 mm aperture, 30 mm aperture, 40 mm aperture, 50 mm aperture and 60 mm aperture are compared as shown in table one and table two.

Table one is a comparison between the defocus compensation value and the astigmatism variation value in the horizontal direction and the vertical direction of the spectacle lens for reducing the decentration in the center of the spectacle lens provided by the present embodiment; table two shows the horizontal and vertical defocus compensation values and the astigmatism contrast of the spectacle lenses provided in the prior art comparative examples.

Watch 1

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Watch two

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By table one can know with the astigmatic degree of table two to compare the result, the utility model provides a reduction side center out of focus the astigmatism of each bore of 20 ~ 60 millimeters of the horizontal direction of lens all is less than about 40% of the side center out of focus astigmatism of ordinary oval design, and the astigmatism of each bore of 20 ~ 60 millimeters of vertical direction all is less than about 25% of the side center out of focus astigmatism of ordinary oval design. Obviously, the utility model provides a reduce other center out of focus lens, its peripheral astigmatism optimization all is higher than prior art's oval out of focus lens, can effectively reduce peripheral astigmatism interference because of too high out of focus compensation leads to, improves the travelling comfort of product.

Claims

1. A reduce other center out of focus lens, includes two refracting surfaces, its characterized in that: wherein at least one refracting surface is a reduced-side center defocus design surface comprising a bright visual region (2) and a defocus compensation region (3); the bright visual area is an elliptical area range formed by taking a caliber of 12 mm in the horizontal direction as a long axis and a caliber of 10 mm in the vertical direction as a short axis; the defocusing compensation area is an elliptical annular area range formed by taking the caliber of 60 mm in the horizontal direction outside the photopic vision area as a long axis and taking the caliber of 50 mm in the vertical direction as a short axis; the average diopter variation and the astigmatism of the bright visual area and the defocus compensation area are distributed in an elliptic radial manner from the optical center to the periphery; the astigmatism of each position in the horizontal direction is less than or equal to the average diopter variation in the horizontal direction, the astigmatism of each position in the vertical direction is less than or equal to the average diopter variation in the vertical direction, and the astigmatism of each position in the horizontal direction corresponds to 65%, 55%, 50%, 45% and 40% of the average diopter variation in the horizontal direction of the same position in the positions of 20 mm caliber, 30 mm caliber, 40 mm caliber, 50 mm caliber and 60 mm caliber respectively; the vertical astigmatism amounts correspond to 90%, 86%, 84%, 80%, and 75% of the vertical average diopter change amount, respectively.

2. The spectacle lens of claim 1, wherein: a defocusing compensation value measuring point (4) in the horizontal direction and a defocusing compensation value measuring point (5) in the vertical direction are respectively arranged in the defocusing compensation area and are respectively positioned at the aperture positions of 40 mm in the horizontal direction and the vertical direction of the optical center (1); the diopter variation at the measuring point in the horizontal direction is 0.80D-2.50D, the diopter variation at the measuring point in the vertical direction is 0.90D-3.00D, and D is a diopter unit.

3. The spectacle lens of claim 1, wherein: the average diopter variation in the horizontal direction of the off-focus design surface at the side center is reduced, the horizontal direction is uniformly accelerated from the optical center to the caliber less than or equal to 12 mm, the horizontal direction is uniformly decelerated from the caliber more than 12 mm to the caliber less than or equal to 50 mm.

4. The spectacle lens of claim 1, wherein: the average diopter variation in the vertical direction of the off-focus design surface at the side center is reduced, the vertical direction is uniformly accelerated from the optical center to the caliber less than or equal to 10 mm, uniform variation is realized from the caliber more than 10 mm to the caliber less than or equal to 50 mm, and uniform deceleration variation is realized from the caliber more than 50 mm.

5. The spectacle lens of claim 1, wherein: the astigmatism of the lateral center defocusing design surface in the horizontal direction is reduced, the horizontal direction is uniformly accelerated from the optical center to the caliber of less than or equal to 12 mm, is uniformly accelerated from the caliber of more than 12 mm to the caliber of less than or equal to 40 mm, is uniformly decelerated from the caliber of more than 40 mm to the caliber of less than or equal to 50 mm, and is in a stable state from the caliber of more than 50 mm.

6. The spectacle lens of claim 1, wherein: the vertical direction astigmatism of the off-center defocus design surface is reduced, the vertical direction is uniformly accelerated from the optical center to the caliber less than or equal to 10 mm, is uniformly changed from the caliber more than 10 mm to the caliber less than or equal to 50 mm, and is uniformly decelerated and gradually stabilized from the caliber more than 50 mm.

7. The spectacle lens of claim 1, wherein: the other refracting surface of the lens is one of a spherical surface, a diffusing surface, a double-smooth surface, a progressive multi-focus surface and a multi-point defocusing structural surface.

8. A spectacle lens as claimed in claim 1, wherein the spectacle lens is a spectacle lens.