CN214252794U - Progressive lens suitable for adolescents for myopia and defocusing around far zone - Google Patents

Abstract

The utility model relates to a far away is with peripheral myopia out of focus progressive lens in district suitable for teenagers, far away be horizontal oval peripheral myopia from the focus district with the district, far away be located the perpendicular top 8 millimeters department in lens geometric center with the measure point, far away be the radial horizontal oval distribution state that reduces gradually with the peripheral diopter of measure point, the horizontal both sides 17mm department of far away with the measure point is out of focus compensation value measuring point, the diopter variation quantity of out of focus compensation value measuring point is 10 ~ 15% of far away with measure point diopter value; the reading measurement point is located 10-14 mm below the geometric center of the lens vertically, and the reading measurement point horizontally deviates 1.5-3 mm towards the inner side of the nose. The lens is formed by superposing transverse elliptical near-sighted defocusing and progressive multi-focus, and has a wide and stable near-distance reading area, a far-distance area has a near-sighted defocusing effect, and the maximum astigmatic diopter of a blind area after the lens is cut and framed is lower than 90% ADD.

Description

Progressive lens suitable for adolescents for myopia and defocusing around far zone

Technical Field

The utility model relates to a teenagers 'myopia intervention lens specifically is the teenagers' multifocal progressive lens that specifically possesses peripheral myopia out of focus effect, low interference astigmatism for the district of using far away.

Background

The principle of reducing the peripheral hyperopic defocus lens of the retina to help control myopia, as shown in figure 1; FIG. 1 (a) is a schematic diagram of uncorrected myopia with the macula and retina in a myopic defocus state; (b) a schematic representation of the macula and retina in a hyperopic defocus state for which hyperopia is uncorrected; (c) correcting myopia by using a common monofocal lens, wherein the macula is out of focus, and the periphery of the retina is in a hypermetropic out-of-focus state; (d) the macula is out of focus, and the periphery of retina is in the schematic diagram of myopia out of focus for the more ideal myopia correction state. Comprehensively viewing the clinical statistical results in various aspects at home and abroad in recent years, the vision optics field at present admits that the peripheral hyperopic defocusing of the retina is compensatory increase of the ocular axis of teenagers and induces a remarkable inducement for myopia deepening, and the myopic defocusing lens can make the peripheral imaging of the retina closer to or reach the front of the retina by compensating the peripheral degree of the lens, so that the peripheral relatively myopic defocusing of the retina is formed, and compared with a common monofocal lens, the peripheral hyperopic defocusing lens can slow down the growth speed of the ocular axis and delay the myopia deepening.

The traditional theory of accommodation spasm considers that the continuous accommodation fatigue and over-accommodation caused by long-time close eye use are important reasons for the myopia deepening of children. Therefore, the rate of progression of myopia can be retarded by wearing a juvenile progressive plate with a near additive.

The existing commercial juvenile myopia intervention lenses cannot take the above two points into consideration, and the single use of one lens with one functional tendency cannot achieve a relatively ideal clinical effect.

Disclosure of Invention

The utility model discloses not enough to prior art exists, provide one kind and can effectively reduce the peripheral interference astigmatism of far away district and reading district, full play myopia out of focus and reduce teenagers and read the peripheral myopia out of focus progressive lens of the peripheral myopia out of focus of far away district that is applicable to teenagers of regulatory action.

The technical scheme for realizing the purpose of the utility model is to provide a peripheral myopic out-of-focus progressive lens suitable for a far-use area of teenagers, which comprises a far-use area and a near-use reading area; the far area of the lens is a horizontal elliptical peripheral near-focus area, the far measurement point of the far area is positioned 8mm above the geometric center of the lens vertically, the peripheral diopter of the far measurement point is in a radial horizontal elliptical distribution state gradually reduced, 17mm positions on two horizontal sides of the far measurement point are defocus compensation value measurement points, and the diopter variation of the defocus compensation value measurement points is 10-15% of the diopter value of the far measurement point; the near reading area is a short channel of 10-14 mm, the reading measuring point of the near reading area is located 10-14 mm below the geometric center of the lens vertically, the horizontal deviation is 1.5-3 mm towards the inner side of the nose, and the addition luminosity ADD of the near reading area is one of +1.50DS, +1.75DS and +2.00 DS; the maximum astigmatism value around the near reading area is less than or equal to 90% ADD; and the addition luminosity ADD of the near reading area is the diopter variation from the far measuring point to the reading measuring point.

The utility model provides a pair of peripheral myopia out of focus progressive lens in district is used far away suitable for teenagers, the diopter change from the fitting point to reading measure point becomes continuous, smooth transition.

The utility model provides a peripheral myopia out of focus progressive lens of district far away suitable for teenagers adopts near-end reading area addition luminosity ADD to be +1.50DS, and its assembly point to the addition luminosity variation of lens geometric center be +0.12 DS- +0.18DS, and the lens geometric center to near-end reading area measurement point's variation is +1.32 DS- +1.38 DS; the maximum light scattering value around the near reading area is less than or equal to 1.35 DS; the near reading area addition luminosity ADD is +1.75DS, the addition luminosity change from the assembly point to the geometric center of the lens is +0.14 DS- +0.21DS, and the addition luminosity change from the geometric center of the lens to the measurement point of the near reading area is +1.54 DS- +1.61 DS; the maximum astigmatism value around the reading area is less than or equal to 1.58 DS; the near reading area addition luminosity ADD is +2.00DS, the addition luminosity change from the assembly point to the geometric center of the lens is +0.16 DS- +0.24DS, and the addition luminosity change from the geometric center of the lens to the measurement point of the near reading area is +1.76 DS- +1.84 DS; the maximum light scattering value around the reading area is less than or equal to 1.80 DS.

The utility model provides a pair of peripheral myopia out of focus progressive lens in district is used to distance suitable for teenagers, its one side is sphere or aspheric surface.

The utility model provides a pair of peripheral myopia out of focus progressive lens in far away district suitable for teenagers, its invention principle is: by adopting the technical scheme of superposing the transverse elliptical myopia defocusing and the progressive multifocal, the peripheral average focal power and the oblique astigmatism power of the distance viewing area of the lens are compensated to be higher, so that the peripheral image of the retina is closer to or reaches the front of the retina to form the peripheral relative myopia defocusing of the retina, and the near reading area adopts the teenager progressive design with low interference astigmatism to form the effect of reducing adjustment.

Compared with the prior art, the utility model provides a pair of peripheral myopia out of focus progressive lens of district is used to far away suitable for teenagers, its beneficial effect lies in:

1. the utility model provides a lens see far zone possesses the regional near-sighted out of focus effect of far away that monofocal and multifocal lens can't realize. The power of the monofocal lens exhibits a rotationally symmetric distribution starting from the optical center, and the power distribution characteristics of the distance zone of a conventional progressive addition lens are similar to those of a conventional monofocal lens except that the field of view is limited to a certain area of the upper half of the lens, and the peripheral mean power and the oblique astigmatism power centered on the monofocal optical center or the distance measurement point of the multifocal lens are both higher than the optical center (or are understood as prescription powers).

2. The utility model provides a lens near zone possesses the additional luminosity of the pertinence reading that single focus and ordinary myopia out of focus lens can't be realized, realizes the gradual adjustment effect. The peripheral average focal power and the oblique astigmatism luminosity of the monofocal lens are higher, which causes hyperopia defocusing, reading fatigue, induction and aggravation of myopia development of the lens, although the common myopic defocusing lens solves the hyperopia defocusing problem of the monofocal lens, a reading area with relatively stable luminosity is provided, the luminosity stability range and the visual field are narrow, the myopic defocusing compensation value is generally fixed at about +1.00DS, and the wearer is not enough for part of high diopter wearers. The utility model provides a lens adopts progressive design in reading the region, possess the open stable reading field of vision, simultaneously to different ametropia number of degrees and adjustment power state design +1.50DS, +1.75DS, +2.00 three kinds of reading of DS adds light, for example low myopia selects to read to add light +1.50DS, medium myopia selects to read to add light +1.75DS, high myopia selects to read to add light +2.00DS, make the better performance of teenagers' multifocal lens reduce the effect of adjusting fatigue and myopia intervention development.

Drawings

FIG. 1 is a schematic diagram of the principle of myopia control by a defocus lens for reducing the peripheral hyperopia of the retina;

fig. 2 is a schematic structural diagram of a progressive lens suitable for use in near-sighted and out-of-focus around a distance area of a teenager according to an embodiment of the present invention;

fig. 3 is a diopter chart of a progressive lens suitable for teenagers, in which the distance area is the peripheral myopic defocus area;

fig. 4 is an astigmatism diagram of a progressive lens with peripheral myopic defocus in a distance area suitable for teenagers according to an embodiment of the present invention;

in the figure, 1. distance measurement points; 2. measuring points of the left defocus compensation value; 3. measuring points of the right defocus compensation value; 4. an assembly point; 5. the geometric center of the lens; 6. reading the measure points; 7. the position of the maximum astigmatism value near the periphery of the reading area.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

Example 1

In this embodiment, a pupil (10 years old, love for reading) is taken as an example, and the optometry result is R: -2.00DS L: -2.00DS, and the interpupillary distance is 58 mm.

Prescription analysis and lens fitting recommendations: the younger the age, the stronger the lens accommodation, but at the same time the ability to self-control is poor. The example is low ametropia, if monoclinic glasses are used, near reading can only correct far-seeing ametropia without wearing glasses, relative far-seeing defocus can be formed, and reading at a short distance is not necessary to wear glasses, but is not beneficial to the reading habit and posture of children; or using common teenagers' multifocal lens, the lens still forms relative far vision defocusing in the far-viewing area; or an asymmetric myopic out-of-focus lens with common design is used, relative hyperopic out-of-focus can be formed in the far-viewing area of the lens, the photometric stability of the near-reading area is poor, and the breadth is relatively narrow.

Adopt the utility model provides a progressive lens suitable for adolescents' peripheral myopia out of focus of district is used far away can effectively solve the aforesaid not enough.

The first face is selected to be the horizontal ellipse near vision out-of-focus design face provided by the utility model, and the second face is the lens of the progressive multi-focus design face of ADD +1.50 DS.

Referring to fig. 2, a schematic structural diagram of a progressive lens suitable for use in a juvenile far zone peripheral myopic defocus is provided in this embodiment; the lens comprises a far-use area and a near-use reading area, wherein the far-use area is a near-sight out-of-focus area at the periphery of a transverse ellipse, a far-use measure point 1 of the far-use area is positioned 8mm above the geometric center 5 of the lens vertically, the peripheral diopter of the far-use measure point is in a radial transverse ellipse distribution state which is gradually reduced, out-of-focus compensation value measuring points are arranged at 17mm positions on two horizontal sides of the far-use measure point, a left out-of-focus compensation value measuring point 2 and a right out-of-focus compensation value measuring point 3 are arranged, and the diopter variation quantity of the out-of-focus compensation value measuring points is 10-15% of the out-of-focus value of the far-use measure point; the near reading area is a short channel of 10-14 mm, a reading measure point 6 of the near reading area is located 10-14 mm below the geometric center of the lens vertically, the horizontal deviation is 1.5-3 mm towards the inner side of the nose, the addition luminosity ADD (diopter change from the far measuring point to the reading measure point) of the near reading area is +1.50DS, the diopter change from the assembly point 4 to the reading measure point 6 is continuous and smooth transition, the addition luminosity change from the assembly point 4 to the geometric center 5 of the lens is +0.12 DS- +0.18DS, and the addition luminosity change from the geometric center 5 of the lens to the reading measure point 6 is +1.32 DS- +1.38 DS. The maximum interference astigmatism value of the near reading area at the position 7 of the maximum interference astigmatism value of the invisible blind area is less than or equal to 90 percent ADD.

Referring to fig. 3 and 4, a diopter chart and an astigmatism chart of a progressive lens suitable for near-sighted defocus around a distance area of a teenager are respectively provided for the embodiment; the actual measurement results are as follows:

a. the actually measured luminosity of the far measurement point of the lens is-2.00 DS;

b. the actual measurement luminosity at 17mm left and right of the far measurement point is-1.70 DS, and the myopic defocus compensation value is +0.30 DS;

c. the actually measured luminosity of the reading measurement point (additional luminosity measurement point) of the reading area is-0.50 DS, and the ADD is +1.50 DS;

d. the maximum astigmatism point of the invisible dead zones on both sides of the near reading area is measured to be 1.23 DC.

Example 2

This example takes an elementary school student of 13 years old (height 170cm, skull size close to adult level) near a small entrance examination as an example, and the results of optometry are R: -5.00DS, L: -5.00DS, and pupil distance 60 mm.

Prescription analysis and lens fitting recommendations: students in six grades of primary school facing the small examination have heavy close-distance work burden. The example is moderate ametropia, the skull size is bigger, the interpupillary distance is relatively smaller, if single-focus glasses are used, glasses are also needed to be worn for near reading, relative hyperopic defocus can be formed for far reading, and the reading at the near distance is stronger and more obvious, which is one of the main inducements of reading fatigue and lens-derived hyperopic defocus to further cause the accelerated development of myopia; or using common teenagers' multifocal lenses, the far-viewing area of the lens still forms relative far-vision defocus and increases with the increase of diopter; or an asymmetric myopic out-of-focus lens with common design is used, relative hyperopic out-of-focus can be formed in the far-part viewing area of the lens, and with the increase of diopter, the photometric stability of the near-reading area is poorer and poorer, and the breadth is narrower and narrower.

To the above situation, adopt the utility model provides a progressive lens of peripheral myopia out of focus of district is used far away suitable for teenagers selects first face for horizontal oval myopia out of focus stack progressive multifocal ADD +2.00DS design face, and the second face is the lens of sphere design face.

Referring to fig. 2, a schematic structural diagram of a transverse elliptical near-focus surface provided in this embodiment is shown; the transverse ellipse near-sight out-of-focus surface of the lens comprises a far-sight area and a near-sight reading area, wherein the far-sight area is a transverse ellipse peripheral near-sight out-of-focus area, a far-sight measurement point 1 of the far-sight area is positioned 8mm vertically above a geometric center 5 of the lens, peripheral diopters of the far-sight measurement point are in a radial transverse ellipse distribution state and gradually reduced, defocus compensation value measurement points are arranged at 17mm positions on two horizontal sides of the far-sight measurement point, a left defocus compensation value measurement point 2 and a right defocus compensation value measurement point 3 are arranged, and diopter variation of the defocus compensation value measurement points is 10-15% of the diopter value of the far-sight measurement point; the near reading area is a short channel of 10-14 mm, a reading measure point 6 of the near reading area is located 10-14 mm below the geometric center of the lens vertically, the horizontal position deviates 1.5-3 mm towards the inner side of the nose, the addition luminosity (diopter change from a far measure point to the reading measure point) of the near reading area is ADD +2.00DS, the change from an assembly point 4 to the geometric center 5 of the lens is +0.16 DS- +0.24DS, and the change from the geometric center 5 of the lens to the reading measure point 6 is +1.76 DS- +1.84 DS; and when the practical and reasonable frame installing range of the cutting edge is within the practical and reasonable frame installing range, the maximum interference astigmatism value of the position 7 of the invisible blind area around the near-use reading area is less than or equal to 90 percent ADD.

The progressive lens suitable for the peripheral myopic defocus in the distance area of the teenager provided by the embodiment has the following measurement results:

a. the actually measured luminosity of the far measurement point of the lens is-5.00 DS;

b. the actual measurement luminosity at 17mm left and right of the far measurement point is-4.25 DS, and the myopic defocus compensation value is +0.75 DS;

c. the actually measured luminosity of the reading measurement point (additional luminosity measurement point) of the reading area is-3.00 DS, and the ADD is +2.00 DS;

d. the maximum astigmatism point of the invisible dead zones on both sides of the near reading area is measured to be 1.75 DC.

By the utility model discloses the result of embodiment 1 and 2 can know, selects the teenagers 'progressive lens that far away has peripheral myopia out of focus with the district, sees the peripheral average focal power of far away district and slant astigmatism luminosity on the high side through the compensation lens for the peripheral formation of image of retina is closer to or reaches retina the place ahead, forms the peripheral myopia out of focus relatively of retina, and near reading area is the low astigmatic teenagers' progressive design of interference of low level, forms the effect that reduces the regulation.

The following benefits are achieved over monofocal lenses, reduced side-center distance vision defocus lenses and juvenile multifocal lenses:

the utility model provides a product sees far zone and possesses the regional near-sighted out of focus effect of far away that monofocal and multifocal lens can't realize. The power of the monofocal lens exhibits a rotationally symmetric distribution starting from the optical center, and the power distribution characteristics of the distance zone of a conventional progressive addition lens are similar to those of a conventional monofocal lens except that the field of view is limited to a certain area of the upper half of the lens, and the peripheral mean power and the oblique astigmatism power centered on the monofocal optical center or the distance measurement point of the multifocal lens are both higher than the optical center (or are understood as prescription powers).

The near-viewing area has single focus and the pertinence reading additional luminosity which can not be realized by the common myopia out-of-focus lens, and the effect of reducing the reading adjusting fatigue of the progressive multi-focus lens is realized. The peripheral average focal power and the oblique astigmatism luminosity of the monofocal lens are higher, which causes hyperopia defocusing, reading fatigue, induction and aggravation of myopia development of the lens, although the common myopic defocusing lens solves the hyperopia defocusing problem of the monofocal lens, a reading area with relatively stable luminosity is provided, the luminosity stability range and the visual field are narrow, the myopic defocusing compensation value is generally fixed at about +1.00DS, and the wearer is not enough for part of high diopter wearers. The utility model provides a product reading area adopts progressive design, possess the open stable reading field of vision, simultaneously to different ametropia number of degrees and adjustment power state design +1.50DS, +1.75DS, +2.00 three kinds of reading of DS adds light, for example low myopia selects to read to add light +1.50DS, medium myopia selects to read to add light +1.75DS, high myopia selects to read to add light +2.00DS, make the better performance of teenagers' progressive multifocal lens reduce the effect of adjusting fatigue and interveneeing near-sighted development.

Claims (6)

1. A peripheral myopic out-of-focus progressive lens suitable for a teenager in a far area comprises a far area and a near reading area, and is characterized in that: the far-use area of the lens is a transverse elliptical peripheral near-vision out-of-focus area, a far-use measuring point (1) of the far-use area is positioned 8mm above a geometric center (5) of the lens vertically, the peripheral diopter of the far-use measuring point is in a radial transverse elliptical distribution state gradually reduced, the positions 17mm on two horizontal sides of the far-use measuring point are defocus compensation value measuring points (2 and 3), and the diopter variation of the defocus compensation value measuring points is 10-15% of the diopter variation of the far-use measuring point; the near reading area is a short channel of 10-14 mm, a reading measurement point (6) of the near reading area is located 10-14 mm below the geometric center of the lens vertically, the horizontal deviation is 1.5-3 mm towards the inner side of the nose, and the added luminosity ADD of the near reading area is one of +1.50DS, +1.75DS and +2.00 DS; the maximum astigmatism value around the near reading area is less than or equal to 90% ADD; and the addition luminosity ADD of the near reading area is the diopter variation from the far measuring point (1) to the reading measuring point (6).

2. A peripheral myopic defocus progressive lens for teenagers in the distance zone of claim 1 wherein: the diopter change from the fitting point (4) to the reading measurement point (6) is a continuous, smooth transition.

3. A peripheral myopic defocus progressive lens for teenagers in the distance zone of claim 1 wherein: the near reading area addition luminosity ADD is +1.50DS, the addition luminosity change from the assembly point (4) to the geometric center (5) of the lens is +0.12 DS- +0.18DS, and the change from the geometric center of the lens to the near reading area measurement point is +1.32 DS- +1.38 DS; the maximum light scattering value around the near reading area is less than or equal to 1.35 DS.

4. A peripheral myopic defocus progressive lens for teenagers in the distance zone of claim 1 wherein: the addition luminosity ADD of the near reading area is +1.75DS, the addition luminosity change from the assembly point (4) to the geometric center (5) of the lens is +0.14DS to +0.21DS, and the addition luminosity change from the geometric center of the lens to the measurement point of the near reading area is +1.54DS to +1.61 DS; the maximum light scattering value around the reading area is less than or equal to 1.58 DS.

5. A peripheral myopic defocus progressive lens for teenagers in the distance zone of claim 1 wherein: the addition luminosity ADD of the near reading area is +2.00DS, the addition luminosity change from the assembly point (4) to the geometric center (5) of the lens is +0.16 DS- +0.24DS, and the addition luminosity change from the geometric center of the lens to the measurement point of the near reading area is +1.76 DS- +1.84 DS; the maximum light scattering value around the reading area is less than or equal to 1.80 DS.

6. A peripheral myopic defocus progressive lens for teenagers in the distance zone of claim 1 wherein: one face of the lens is spherical or aspherical.

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