CN211603755U

CN211603755U - Free-form surface customized monofocal spectacle lens for correcting hyperopia of teenagers

Info

Publication number: CN211603755U
Application number: CN202020054880.1U
Authority: CN
Inventors: 徐光华; 余浩墨; 姚飞
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: 2020-01-12
Filing date: 2020-01-12
Publication date: 2020-09-29
Anticipated expiration: 2030-01-12

Abstract

The utility model relates to a free-form surface customization type monofocal lens for correcting adolescent hyperopia. The shape of the lens is circular or oval, the radius or the major axis radius of the lens is the horizontal distance from the pupil point of the lens frame to the far end of the temporal side of the lens frame plus the margin of the cutting edge, and the edge thickness is more than or equal to 1.1 mm. The utility model provides a lens, its shape, size and the thinnest department position of lens set up according to the mirror frame of joining in marriage, and the surface of lens is sphere or aspheric surface, and the internal surface is aspheric surface or toroidal surface, is applicable to the free-form surface singlepiece processing of customization type. The utility model provides a lens can reach the frivolous pleasing to the eye effect of best when the lens has best optical property.

Description

Free-form surface customized monofocal spectacle lens for correcting hyperopia of teenagers

Technical Field

The utility model relates to a free-form surface monofocal lens especially relates to a free-form surface monofocal lens suitable for hyperopia is corrected.

Background

Traditional hyperopia lenses are cast in molds that are round in shape. Since the rims have different sizes and shapes, the aperture of the lens is determined by the maximum rim size in order to adapt the lens to the requirements of various rims, and therefore the aperture of the lens produced by the mold casting method is relatively large. However, the edge thickness of any spectacle lens cannot be less than 1.1mm, so that the lens with a large caliber is thicker and heavier.

Although the aspheric lens has accomplished the advantage that the lens medium thickness is than the spherical lens and has had some attenuate through the design, chinese utility model patent CN201828723U discloses an aspheric presbyopic lens, and CN201909908U discloses a mould is prepared to aspheric presbyopic lens, a disclosed aspheric surface farsighted lens of correcting, relevant data surface, for the spherical lens, the aspheric lens compares at same lens bore and same lens material, circular aspheric lens's central thickness: the aspherical lens was 7.209mm and the spherical spectacle lens was 7.992 mm. It follows that the aspheric ophthalmic lens design does not address the limited thickness reduction due to the fixed edge thickness and the large diameter.

The non-lens or the non-spherical lens customized for the garage in the common free curved surface can be thinner through the lens reduction and the knife edge, but the circular shape of the lens cannot be optimally matched with the shape of a frame, and the optimal effect of light weight and thinness is not achieved. The thick and heavy hyperopia lens is not only lack in appearance, but also easily oppresses the bridge of the nose to produce face impression and even can lead to the glasses to easily slide down from normal wearing, directly influences visual comfort. Especially, the influence on teenagers in a development period is larger.

Disclosure of Invention

The utility model discloses to the not enough that prior art exists, provide one kind and can effectively reduce the lens thickness, reach the single focus lens of free-form surface that is used for teenagers' hyperopia to correct of best frivolous pleasing to the eye effect.

In order to achieve the above object, the present invention provides a free-form customized single-focus spectacle lens for correcting hyperopia of teenagers, which is circular in shape, wherein the radius of the lens is the horizontal distance from the pupil point of the spectacle frame to the temporal far end of the spectacle frame plus the margin of edge cutting, and the edge thickness is greater than or equal to 1.1 mm.

The utility model discloses technical scheme still provides a shape and customizes type monofocal lens for oval-shaped free form surface that is used for teenagers hyperopia to correct, and the major axis radius of lens is in addition the cut edge surplus to the horizontal distance of picture frame temporalis side distal end for the pupil point of joining in marriage the mirror frame, and the edge of lens is greater than joining in marriage the mirror frame and adds the cut edge surplus, and marginal thickness more than or equal to 1.1 mm.

The cutting margin of the utility model is 2 mm. The outer surface of the lens is a spherical surface or an aspheric surface, and the inner surface of the lens is an aspheric surface or a toroidal curved surface.

According to the specification of the national standard GBT14214-1993 of spectacle frames, the size of the spectacle frame is 33-56 mm. Common spectacle frames for teenagers, such as baby frames, have common sizes of 40-48 mm; the common size of the adult spectacle frame is 50-56 mm; as can be seen, the frame of the teenager is much smaller than the frame of the adult. The utility model discloses the picture frame parameter that accessible mirror holder scanning or prestore designs into the lens with picture frame shape size phase-match to set for the sword limit (being the thinnest department of lens) position according to the shape size of lens, make sword limit position be close to lens optical center as far as possible, thereby reduce the lens as far as possible and be thick, reach the frivolous pleasing to the eye effect of best.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model provides a pair of novel a free-form surface monofocal lens for hyperopia is corrected, the shape size of its lens carries out individualized setting according to the horizontal distance that glasses wearer matched a mirror picture frame pupil point to picture frame temporal side distal end, the picture frame parameter through mirror holder scanning or prestore designs into the lens with picture frame shape size phase-match, and set for the sword limit (being the thinnest department of lens) position according to the shape size of lens, make the sword limit position be close to lens optical center as far as possible, thereby reduce the lens medium thickness as far as possible, reach the frivolous pleasing to the eye effect of best. Meanwhile, the lens is designed to be an inner surface aspheric surface or a toroidal curved surface, so that peripheral aberration and deformation can be reduced while the lens is thin, the contrast sensitivity is enhanced, and clearer and more comfortable visual quality is provided for a wearer.

2. The utility model provides a free form surface monofocal lens for hyperopia is corrected to when the pupil point of glasses wearer's glasses-matching picture frame adds trimming surplus isoparametric to the horizontal distance of picture frame temporality side distal end and confirms, then the shape, size and the sword limit position of this free form surface lens can match above parameter, make the sword limit position of the sword limit position distance actual picture frame requirement of lens no longer than 2 millimeters, thereby make the best frivolous effect of obtaining of the lens after the trimming dress frame.

3. The utility model provides a free-form surface monofocal lens for farsighted correction, its inner surface adopts aspheric surface or toroidal surface design, has eliminated the peripheral off-axis aberration of lens, enlarges the peripheral clear field of vision scope of lens, has strengthened the contrast sensitivity of formation of image. Because the optical design is processed on the inner surface of the lens and is closer to the eyeball, the imaging quality of the lens is less influenced by the wearing position of the frame, and compared with an aspheric lens manufactured by a mold, the aspheric lens manufactured by the mold has the advantage of comfort level. Meanwhile, the aspheric surface and the toroidal surface design can bring the effect of overlapped center thickness reduction to the lens.

Drawings

Fig. 1 is a schematic structural diagram of a free-form surface monofocal spectacle lens suitable for hyperopia correction provided in embodiment 1 of the present invention;

fig. 2 is a schematic diagram of a free-form single-focus ophthalmic lens suitable for distance vision correction according to another embodiment of the present invention.

In the drawings, 1, a spectacle frame; 2. a pupil point; 3. a temporal distal point; 4. cutting the margin; 5. lens (major axis) radius; 6. a lens; 7. receding into the smallest outer circle.

Detailed Description

The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

Example 1:

the parameters and results of the lens prepared according to the prior art are shown in table 1.

TABLE 1

。

Referring to fig. 1, there is shown a schematic structural diagram of a free-form single-focus spectacle lens suitable for far-vision correction according to the present embodiment; in this embodiment, the horizontal distance from the pupil point 2 to the distal point 3 on the temporal side of the spectacle frame 1 is 22mm, in this embodiment, the margin for edge cutting 4 is 2mm, the lens radius 5 of the lens 6 is the horizontal distance from the pupil point to the distal point on the temporal side plus the margin for edge cutting, the lens radius is 22+ 2 = 24 mm, that is, the caliber of the spectacle lens is 48 mm. The lens parameters and results prepared according to the technique provided in this example are shown in table 2.

TABLE 2

。

Comparing the data in tables 1 and 2, it can be seen that the central thickness of the lens is 8.092mm according to the prior art, while the central thickness of the lens provided by the technical solution of the present embodiment is 3.723mm, the weight of the lens is greatly reduced due to the greatly reduced thickness of the lens.

Imaging quality of ophthalmic lenses: the point array chart of the lens prepared according to the prior art is 0.422mm, the point array chart of the lens prepared according to the technical scheme of the embodiment is 0.037mm, and the imaging quality of the spectacle lens is also obviously improved.

The shape and size of the lens body and the thinnest position of the lens are taken according to the shape of the spectacle frame. The shape and size of the lenses are valued according to the shape of the frame of the glasses because the frame of teenagers is much smaller than that of adults. The national standard GBT14214-1993 for spectacle frames specifies that the frame size is 33-56 mm. Common spectacle frames for teenagers, such as baby frames, have common sizes of 40-48 mm; the aperture of a free-form surface customized monofocal ophthalmic lens for correcting hyperopia in adolescents is taken to be 48mm, while a lens produced by a mold method requires 72 mm.

Example 2

Referring to fig. 2, it is a schematic structural diagram of a free-form single-focus spectacle lens for distance vision correction according to the present embodiment; through the picture frame parameter of mirror holder scanning or prestoring, design into the lens and join in marriage with the size of 1 shape of mirror frame, the shape of taking lens 6 is oval, and the major axis radius 5 of lens is the pupil point 2 of mirror frame to the horizontal distance of picture frame temporal side distal end 3 plus the margin of cutting 4, is the radius of the minimum excircle 7 of lens indentation promptly, and the edge of lens is greater than the mirror frame and adds the margin of cutting, and edge thickness more than or equal to 1.1 mm. The margin of the cut edge can be 2 mm. The outer surface of the lens is a spherical surface, and the inner surface is an aspheric surface.

The utility model provides a free-form surface monofocal lens for hyperopia is corrected, the shape size of its lens carries out individualized setting according to the independent interpupillary distance of monocular and picture frame parameter, the picture frame parameter through mirror holder scanning or prestore with the lens design into with picture frame shape size phase-match, and set for the sword limit (being the thinnest department of lens) position according to the shape size of lens, make the sword limit position be close to lens geometric center (the pupil point of joining in marriage the mirror frame) as far as possible, thereby reduce the lens medium thickness as far as possible, reach the frivolous pleasing to the eye effect of best. Meanwhile, the lens is designed to be a double-surface aspheric surface, so that peripheral aberration and deformation can be reduced while the lens is thin, the contrast sensitivity is enhanced, and clearer and more comfortable visual quality is provided for a wearer.

Claims

1. A free-form, custom-made, monofocal ophthalmic lens for juvenile hyperopia correction, comprising: the shape of the lens is circular, the radius (5) of the lens is the horizontal distance from a pupil point (2) of a spectacle frame to a temporal far end (3) of the spectacle frame plus a cutting margin (4), and the edge thickness is more than or equal to 1.1 mm.

2. The free-form custom spectacle lens for presbyopia correction in adolescents as claimed in claim 1, wherein: the margin of the cut edge is 2 mm.

3. The free-form custom spectacle lens for presbyopia correction in adolescents as claimed in claim 1, wherein: the outer surface of the lens is spherical or aspherical, and the inner surface is aspherical or toroidal.

4. A free-form, custom-made, monofocal ophthalmic lens for juvenile hyperopia correction, comprising: the shape of lens is oval, and the major axis radius (5) of lens is in addition trimming surplus (4) for pupil point (2) to the horizontal distance of picture frame temporal side distal end (3) of joining in marriage mirror picture frame, and the edge of lens is greater than joining in marriage mirror picture frame and adds trimming surplus, and edge thickness more than or equal to 1.1 mm.

5. The free-form custom spectacle lens for presbyopia correction in adolescents as claimed in claim 4, wherein: the margin of the cut edge is 2 mm.

6. The free-form custom spectacle lens for presbyopia correction in adolescents as claimed in claim 4, wherein: the outer surface of the lens is spherical or aspherical, and the inner surface is aspherical or toroidal.