CN212965668U

CN212965668U - Ring focus myopia lens for delaying myopia progression and preparation mold thereof

Info

Publication number: CN212965668U
Application number: CN202022085647.2U
Authority: CN
Inventors: 任建锋; 陈晓翌; 李德; 江德烽; 余浩墨
Original assignee: Suzhou Mingshi Optical Technology Co ltd; Jiangsu Mingshi Optical Technology Co ltd
Current assignee: Suzhou Mingshi Optical Technology Co ltd; Jiangsu Mingshi Optical Technology Co ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-04-13
Anticipated expiration: 2030-09-22

Abstract

The utility model discloses a ring burnt myopia lens and preparation mould for delaying myopia deepening, including the lens body, the lens body has first region, second region and third region with the central point to lens body edge extension respectively, and the preparation mould includes upper die base and die holder, and the upper die base matches with the die holder and constitutes cavity structures, and cavity structures surface shape of face is ring burnt, sphere or ring curved surface structure. The utility model has the advantages that: the lens can compromise and the moderate degree reduces wearing travelling comfort and the adaptability effect that the position influences of wearing to guarantee the peripheral out of focus offset value of hyperopia more than 1.0D, can also make in batches through the mould, reduce cost promotes on a large scale.

Description

Ring focus myopia lens for delaying myopia progression and preparation mold thereof

Technical Field

The utility model relates to an optical lens technical field specifically is a ring burnt myopia lens and preparation mould for delaying myopia progression.

Background

According to the theory that the recent increase of the myopia degree is influenced by the defocus at the periphery of the human eye, when a teenager with axial myopia wears a single-focus spectacle and corrects the myopia at the central macular region, the hyperopic defocus is formed at the periphery of the retina, thereby inducing the compensatory increase of the axial axis of the eye and accelerating the myopia. Through research and clinical verification, through the hyperopia out-of-focus compensation design that the peripheral negative power of the lens is reduced, the 360-degree ring-focus myopia lens is beneficial to relieving the myopia deepening degree compared with the traditional single-focus myopia lens.

However, the design of the common 360-degree ring-focus myopia lens only considers the theoretical parallel light incidence far-point spherical model, and the design only ensures that the pupil is accurately assembled, the wearing habit of a wearer is good, and the wearing comfort is ensured under the condition that the spectacle frame is parallel to the retina. In fact, in practical application, due to the existence of the inclination angle and the face bending angle of the spectacle frame and the distance between the spectacle frame and the spectacle eyes and the problem of the wearing habit of the teenagers, the actual wearing position of the spectacle lens is usually deviated from the theoretical design position. In this case, the presence of peripheral astigmatism would seriously interfere with the lens wearing comfort, with the secondary effect of the peripheral hyperopic defocus compensation design with reduced absolute value of peripheral diopter; the personalized peripheral myopic out-of-focus lens which is subjected to compensatory optimal design and accurate assembly in a manufacturing factory aiming at different wearing positions of the individual glasses can solve the problem caused by the influence of wearing positions, but the personalized lens cannot be manufactured in batches by adopting a production mode of mold pouring, the cost of turning single-pair customization is very high, and the fitting method is relatively complex and is not easy to popularize. Due to this problem, the peripheral hyperopic defocus compensation value within 40mm full aperture of the conventional 360-degree ring lens has to be controlled low, most maximum values being below 1.0D. Or the comfort is sacrificed and a large compensation value is forced to be made despite the increase of the astigmatism value. Both of these modes affect the control of hyperopic defocus and thus the theoretical effect of slowing the progression of myopia.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a ring burnt myopia lens for delaying myopia deepening to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a ring burnt myopia lens for slowing myopia progression, includes the lens body, the lens body with the central point to lens body edge extends respectively has first region, second region and third region.

Preferably, the first zone is a central bright zone of 5mm diameter and the mean power change from centre to edge is less than 0.1D.

Preferably, the second zone has a peripheral hyperopic defocus control zone of diameter between 5-40 mm.

Preferably, in the second area, the variation of the average diopter of the lens from the 2.5mm half caliber to the 20mm half caliber is between 1.0D and 1.25D according to the difference of the central diopter of the lens.

Preferably, the third zone is 40mm in diameter to the astigmatism and power variation control zone of the lens body edge.

Preferably, the front surface of the lens body is designed to be a ring focus, and the back surface of the lens body is designed to be a spherical surface or a toroidal curved surface.

The utility model provides a ring burnt myopia lens preparation mould for delaying myopia progression, includes upper die base and die holder, the upper die base with the die holder matches and forms the cavity structure, cavity structure surface shape is ring burnt, sphere or ring curved surface structure, cavity structure upper end and lower extreme all are equipped with the limit circle.

Advantageous effects

The utility model provides a ring burnt myopia lens and preparation mould for delaying myopia deepening, the lens can compromise and the moderate degree reduces wears travelling comfort and adaptability effect that the position influences to guarantee the peripheral out of focus offset value of hyperopia more than 1.0D, can also make in batches through the mould ization, and reduce cost carries out popularization on a large scale.

Drawings

FIG. 1 is a schematic view of the lens body structure of the present invention;

fig. 2 is a schematic view of the astigmatism variation of the peripheral astigmatism control area of the present invention;

FIG. 3 is a schematic diagram of the astigmatism variation of the peripheral hyperopia defocus area of the present invention;

fig. 4 is a schematic view of the mold structure of the present invention.

Reference numerals

1-a lens body, 2-a central point, 3-a first area, 4-a second area, 5-a third area, 6-an upper die holder, 7-a lower die holder, 8-a cavity structure and 9-a rim.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Examples

As shown in fig. 1-4, a ring-focus myopic lens for slowing down myopic progression comprises a lens body 1, wherein a first area 3, a second area 4 and a third area 5 respectively extend from a central point 2 of the lens body 1 to the edge of the lens body 1.

Preferably, the first zone 3 is a central bright zone of 5mm diameter and the mean power change from the centre to the periphery is less than 0.1D.

Preferably, the second zone 4 is a peripheral hyperopic defocus control zone of between 5-40mm in diameter.

Preferably, in the second zone 4, the variation of the average power of the lens from 2.5mm semi-calibre to 20mm semi-calibre varies from 1.0D to 1.25D depending on the central power of the lens.

Preferably, the third zone 5 has a diameter of 40mm up to the astigmatism and power variation control zone of the edge of the lens body 1.

Preferably, the front surface of the lens body 1 is designed to be ring focus, and the back surface is designed to be spherical or toroidal.

The utility model provides a ring burnt myopia lens preparation mould for delaying myopia progression, includes upper die base 6 and die holder 7, and upper die base 6 matches with die holder 7 and forms cavity structure 8, and cavity structure 8 surface shape is ring burnt, sphere or ring curved surface structure, and cavity structure upper end and lower extreme all are equipped with the rim 9.

Example 2

The utility model provides a ring burnt myopia lens for slowing myopia progression, includes lens body 1, and lens body 1 extends respectively to lens body 1 edge with central point 2 has first region 3, second region 4 and third region 5.

Preferably, the front surface of the lens body 1 is designed to be spherical and the rear surface is designed to be ring focus.

The lens body is divided into three areas, namely a central clear vision area, an off-axis aberration correction area and an astigmatism control area, diopter change of a first area-a central diopter stable area of the lens body is stable, the lens is a clear vision area of the lens and is matched with normal optometry data for central macular vision correction, a peripheral hyperopic defocus control area of a second area of the lens body is controlled to be not more than 75% of an average diopter value on the basis that the fact that the peripheral hyperopic compensation value of 35-degree field angle is reduced to be more than 1.0D, so that the influence on the imaging quality of the area caused by deviation of a spectacle frame wearing position from a theoretical design position is reduced, and the astigmatism and diopter change control area of a third area of the lens body fully considers that the peripheral hyperopic required control area of normal eyes is exceeded, so that the fact that the peripheral astigmatism is increased continuously to further reduce deviation of the spectacle frame actually wearing position from the theoretical design position can be generated The peripheral interference increase factor. The synchronization substantially controls the increase in the unwanted diopter and astigmatism values, thereby reducing the likelihood of increased peripheral interference.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the protection scope of the present invention.

Claims

1. A ring focus myopia lens for slowing myopia progression, comprises a lens body (1), and is characterized in that: the lens body (1) is provided with a first area (3), a second area (4) and a third area (5) which respectively extend from a central point (2) to the edge of the lens body (1).

2. An annular focus myopic lens for slowing the progression of myopia according to claim 1, in which: the first zone (3) is a central bright zone of 5mm diameter and the mean power change from centre to edge is less than 0.1D.

3. An annular focus myopic lens for slowing the progression of myopia according to claim 1, in which: the second zone (4) is a peripheral hyperopic defocus control zone of between 5-40mm in diameter.

4. An annular focus myopic lens for slowing the progression of myopia according to claim 3, in which: in the second area (4), the variation of the average diopter of the lens from the semi-caliber of 2.5mm to the semi-caliber of 20mm is between 1.0D and 1.25D according to the difference of the central diopter of the lens.

5. An annular focus myopic lens for slowing the progression of myopia according to claim 1, in which: the diameter of the third area (5) is 40mm to the astigmatism control area of the edge of the lens body (1).

6. An annular focus myopic lens for slowing the progression of myopia according to claim 1, in which: the front surface of the lens body (1) is designed to be a ring focus, and the rear surface of the lens body is designed to be a spherical surface or a toroidal curved surface.

7. The utility model provides a ring burnt myopia lens preparation mould for slowing myopia progression, includes upper die base (6) and die holder (7), its characterized in that: the upper die base (6) and the lower die base (7) are matched to form a cavity structure (8), the surface shape of the cavity structure (8) is a ring focus, spherical surface or ring curved surface structure, and the upper end and the lower end of the cavity structure are both provided with edge rings (9).