CN215006124U

CN215006124U - Asymmetrical multipoint peripheral myopia defocus spectacle lenses for juvenile myopia control

Info

Publication number: CN215006124U
Application number: CN202121410062.1U
Authority: CN
Inventors: 任建锋; 李春琦; 颜蒙; 李林峰; 黄启泰; 倪颖; 王毅
Original assignee: Suzhou University
Current assignee: Suzhou Mingshi Optical Technology Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-12-03
Anticipated expiration: 2031-06-24

Abstract

The utility model belongs to the technical field of spectacle optics, and in order to solve the problem of further deepening of refractive error due to visual discomfort after wearing a myopic defocus lens for juvenile myopia control, an asymmetric multi-point peripheral lens for juvenile myopia control is proposed. Myopia defocus spectacle lenses, the front surface of the lens is spherical design, the rear surface is aspherical or super toric design, it is characterized in that: the lens includes a central photopic area and a peripheral myopic defocus area; the central photopic area is located in the middle of the lens The part is the area used to correct myopia. The central photopic area presents an asymmetrical distribution in an oblique "T" shape around the geometric center of the lens; the peripheral myopic defocus area of the lens is located at the periphery of the central photopic area. Extending the central photopic area obliquely into a "T" shape can effectively reduce the sudden change of the optical image in the gaze area when young people read at close range, and increase the wearing comfort by reducing the astigmatism in the gaze area.

Description

Asymmetric multi-point peripheral myopic out-of-focus spectacle lens for juvenile myopia control

Technical Field

The utility model belongs to the technical field of glasses optics, concretely relates to teenagers are with lens of control ametropia aggravation.

Background

The myopia trend of teenagers is higher and higher, the ametropia caused by the unhealthy eyes of the teenagers is gradually intensified, and the ametropia is generally controlled to be intensified by peripheral myopic out-of-focus lenses. The eyes of teenagers are not the same as those of adults, so that a myopia focusing lens suitable for the teenagers is needed to be developed to assist the teenagers in controlling the ametropia aggravation.

There are two main types of peripheral defocus lenses currently used for myopia control, one for reducing hyperopic defocus by gradually decreasing the surface power from the center to the edge, and the second for obtaining peripheral defocus by superimposing a micro-array positive lens. Factors such as interference formed by overlapping of microlenses, influence of a wearing position of a spectacle frame and the like need to be comprehensively considered in aberration correction design, and the mean focal power compensation value of the angular position of a field of view of 30 degrees needs to be lower than 5% of the central diopter of a lens.

The first defocusing mirror design is subjected to diopter change and simultaneously has increased astigmatism, the peripheral defocus compensation value is in a certain range, and a +2.5D compensation value cannot be formed in a 30-degree field angle, otherwise, large astigmatism is brought, and a wearer cannot obtain comfortable wearing experience. In the second design, a micro-array lens is added on the surface, lenses are distributed in a rotational symmetry mode which is popular in the market, the lower parts of the lenses can be used intensively when teenagers use the eyes, even a reading corridor area can be formed, if a luminosity stable area in a certain range does not exist in the area, the vision line can be imaged again through the optical center part of the lenses to solve the problem when the vision line is formed in the fixation process and the vision line is subjected to high-frequency intensive switching between different diopters of the micro-lens and the primary lens, the vision line can be dizzy and tired by using the eyes, and the like, so that the sitting posture is changed by lowering the head, and the problem that the vision line cannot be adapted to the glasses is easily caused. Even if the teenager group has strong adaptability and can adapt to the near-use effect of the glasses, the form-sense deprivation risk possibly brought by using the fixation function in the region with unstable luminosity for a long time still exists, and the possibility of inducing other potential eye diseases such as form-sense deprivation myopia deepening, binocular single vision difficulty, adjustment delay and the like exists.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be: the myopia out-of-focus lens for teenager myopia control at present, complaints caused by wearing of teenagers and the risk of inducing other deep eye diseases by abandoning or long-term use.

A peripheral myopia out of focus lens of asymmetric multiple spot for teenagers' myopia control, the lens front surface is the design of sphere, and the rear surface is aspheric surface or the design of super ring face, its characterized in that: a central photopic region and a peripheral myopic defocus region on the lens; the central photopic vision area is positioned in the middle part of the lens and is an area for correcting myopia, and the central photopic vision area is in an asymmetric distribution in a tilted T shape around the geometric center of the lens; the peripheral myopic defocus area of the lens is positioned at the periphery of the central photopic vision area.

The working principle of the scheme is as follows: according to the glasses matching use habit of teenagers, the central photopic region, particularly the lower oblique T-shaped vertical region is determined according to the effective region of the lenses used by the eyes of the teenagers when the teenagers use the eyes, and the central photopic region is obliquely extended into the T shape, so that the sudden change of an optical image in a near-use fixation region when the teenagers use the glasses can be effectively reduced, and the wearing comfort is improved.

The technical effect of the scheme is as follows: the lens can greatly relieve the discomfort of short-distance eyes after being worn by teenagers, reduce the complaint of the lens and reduce the risk of eye diseases induced by long-term form-sense deprivation of the traditional rotationally symmetrical microlens array afocal lens.

The preferred scheme is as follows:

the peripheral near-vision focusing area is formed by arranging a micro lens array with positive focal power, and the periphery of the central photopic vision area is in a diffusible amplification shape. After the small lenses with positive focal power are superposed on the myopic refractive correction surface, the small lenses form an independent image surface in front of the retina, and the small lenses with positive focal power form peripheral myopic defocus. The arrangement of tiny lenses, the lens designs the clear vision area through the bionic principle of human eyes, and the peripheral myopic defocus area assists in delaying the progression of ametropia; the asymmetric multipoint myopia focusing lens with the structure fully considers the characteristics of glasses fitting of teenagers, and can effectively reduce the uncomfortable wearing.

The microlens array is arranged in a uniform arrangement, and the intervals between each microlens are equal.

The asymmetric multipoint peripheral myopic out-of-focus spectacle lens for juvenile myopia control is designed to be of positive refractive power, and diopter formed by the rear surface of the micro lens is within +2.5D to + 3.5D. The arrangement can enable the secondary image surface to be located between 5mm and 10mm in front of the retina.

Drawings

FIG. 1 is a schematic view of a central region of photopic vision including an elliptical region;

FIG. 2 is a schematic diagram of a central photopic vision region including a rectangular region;

FIG. 3 is a graph of transition microlens power versus outer zone microlens power;

FIG. 4 is a plot of microlens diameter versus pitch;

fig. 5 is a schematic structural diagram of the left eye and right eye glasses.

Detailed Description

A peripheral myopia out of focus lens of asymmetric multiple spot for teenagers' myopia control, the lens front surface is the design of sphere, and the rear surface is aspheric surface or the design of super ring face, its characterized in that: a central photopic region and a peripheral myopic defocus region on the lens; the central photopic vision area is positioned in the middle part of the lens and is an area for correcting myopia, and the central photopic vision area is in an asymmetric distribution in a tilted T shape around the geometric center of the lens; the peripheral myopic defocus area of the lens is positioned at the periphery of the central photopic vision area; the central photopic vision region comprises an elliptical region, as shown in fig. 1, the major axis direction of the central photopic vision region is L1: 12-15 mm, and the minor axis direction is L2: 9-11 mm; the corridor channel is read below the central clear vision area, the width L3 is 4-6 mm, the length L4 is 5-7 mm, the distance from the central point of the channel to the geometric symmetry axis L30 of the lens is 1.5-2.5 mm, and the internal deflection angle theta is 8-11 degrees. The effect is as follows: when teenagers read, stare at the following to use, namely: and (6) staring. Reducing astigmatism in the coagulated region.

In another embodiment, as shown in FIG. 2, the central photopic region comprises a rectangular region; the length direction L1 of the central photopic region is 12-15 mm, the short axis direction L2 is 9-11 mm, a corridor channel is read below the central photopic region, the width L3 is 4-6 mm, the length L4 is 5-7 mm, the distance between the center point of the channel and the geometric symmetry axis L30 of the lens is 1.5-2.5 mm, and the internal deflection angle theta is 8-11 degrees.

A more preferable scheme is shown in fig. 3, the peripheral near-vision out-of-focus area is formed by arranging a micro lens array with positive focal power, and the periphery of the central photopic vision area is in a diffusible amplification shape; the refractive power of a first row of microlenses at the intersection of the microlens array and the inclined T shape is set to be gradually changed; its refractive power is lower than that of the outer microlens by 0.25D. The effect is as follows: the reduction of the power of the lenticules in a circle at the edge of the vertical zone is done in order to reduce the abrupt change of the optical image, and so to speak, the astigmatism, in the area of fixation in teenagers.

Further, as shown in FIG. 4, the diameter r of the micro-lenses is 0.8-2 mm, and the spacing d between the micro-lenses is 1.5 to 2.5 times the diameter of the micro-lenses. The arrangement can ensure that the energy occupancy is 60% -90%.

When the lens is used for the left eye and the right eye lens, the inclined T shape inclines towards the nose bridge, and as shown in fig. 5, the central photopic vision area on the lens for the left eye and the central photopic vision area on the lens for the right eye are symmetrically distributed.

Claims

1. A peripheral myopia out of focus lens of asymmetric multiple spot for teenagers' myopia control, the lens front surface is the design of sphere, and the rear surface is aspheric surface or the design of super ring face, its characterized in that: a central photopic region and a peripheral myopic defocus region on the lens; the central photopic vision area is positioned in the middle part of the lens and is an area for correcting myopia, and the central photopic vision area is in an asymmetric distribution in a tilted T shape around the geometric center of the lens; the peripheral myopic defocus area of the lens is positioned at the periphery of the central photopic vision area.

2. The asymmetric multi-point peripheral myopic out-of-focus ophthalmic lens for juvenile myopia control of claim 1, which comprises: the central photopic region comprises an elliptical or rectangular area.

3. The asymmetric multi-point peripheral myopic out-of-focus ophthalmic lens for juvenile myopia control of claim 1, which comprises: the peripheral near-vision focusing area is formed by arranging a micro lens array with positive focal power and is distributed in a diffusible amplification shape at the periphery of the central photopic vision area.

4. The asymmetric multi-point peripheral myopic out-of-focus ophthalmic lens of claim 3 for juvenile myopia control, which is characterized by: the refractive power of a first row of microlenses at the intersection of the microlens array and the inclined T shape is set to be gradually changed; its refractive power is lower than that of the outer microlens by 0.5D.

5. The asymmetric multi-point peripheral myopic out-of-focus ophthalmic lens for juvenile myopia control of claim 1, which comprises: the central photopic vision zone on the lens for the left eye is symmetrically distributed with the central photopic vision zone on the lens for the right eye.

6. The asymmetric multi-point peripheral myopic out-of-focus ophthalmic lens for juvenile myopia control of claim 1, which comprises: the major axis direction of the central photopic vision area is 12-15 mm, and the minor axis direction is 9-11 mm.

7. The asymmetric multi-point peripheral myopic out-of-focus ophthalmic lens for juvenile myopia control of claim 1, which comprises: a reading corridor channel is arranged below the central photopic vision area, the width of the channel is 4-6 mm, the length of the channel is 5-7 mm, the distance between the central point of the channel and the geometric symmetry axis of the lens is 1.5-2.5 mm, and the internal deflection angle of the channel is 8-11 degrees.