CN116125680A - Partitioned gradual change multiple spot defocus type myopia prevention and control lens - Google Patents

Abstract

The invention discloses a partitioned gradual change multipoint defocus type myopia prevention and control lens, which comprises a lens body, wherein two sides of the lens body comprise an outer side surface and an inner side surface, and the lens body comprises a refraction area which is formed by curved surfaces of the outer side surface and the inner side surface together and used for correcting vision; micro convex lenses are regularly and uniformly distributed on the surface of the outer side surface; the optical center of the lens body is provided with a myopia refractive correction area; the periphery of the myopia refraction correction area is respectively formed into a powerful intervention area and an auxiliary buffer intervention area from the optical center to the edge of the lens by micro convex lenses with different diopters; the diopter of the miniature convex lens in the powerful intervention area is larger than that of the miniature convex lens in the auxiliary buffer intervention area. The beneficial effects are that: the invention divides the lens into a central far-use clear area, a powerful intervention area and an auxiliary buffer intervention area through the distribution of the miniature convex lenses with different diopters, and can effectively control the deepening of the myopic power through the powerful intervention area and the myopic defocus powerful intervention and auxiliary intervention respectively applied to retina.

Description

A partitioned gradient multi-point defocus type myopia prevention and control lens

technical field

The invention relates to a defocus lens, in particular to a partitioned progressive multi-point defocus type myopia prevention and control lens, which belongs to the technical field of myopia lenses.

Background technique

At present, the research on myopia deepening shows that the main reason for the increase of myopia degree is the extension of the axial length of the eye, and the degree of increase is 3.00D for every 1mm of extension. Medical research has confirmed that the elongation of the eyeball depends on the peripheral defocus of the retina. According to the concept of refractive optics, the focus that falls in front of the retina is called myopic defocus, and the focus that falls behind the retina is called hyperopic defocus.

According to the studies of zoology and ophthalmology, the human eyeball is an ellipsoidal special structure. Although the human eye mainly uses the macular area in the center of the retina to see things, because the peripheral retina is larger than the central retina, there are more neurons, so peripheral defocus has a greater impact on eyeball growth and during refractive development than central defocus.

Because the human eye has a self-made mechanism of "seeing objects clearly", the retina can recognize the defocus signal, and send a "growth" or "stop growth" signal to the sclera according to the defocus information, thereby controlling the growth rate of the eye axis. When wearing ordinary single-vision lenses, the single luminosity only solves the problem of clear vision in the central light area, so that the central image falls on the retina, but the peripheral image falls behind the retina. In order to eliminate peripheral hyperopic defocus, the human eye moves the eyeball to After elongation, the peripheral image is imaged on the retina, which leads to the growth of the eye axis and the deepening of myopia. The center of the retina of myopia shows myopic defocus, and the periphery of the retina shows hyperopic defocus. This kind of hyperopic defocus around the retina is the main reason for the continuous increase in the degree of myopia.

The myopic defocusing lens can make the peripheral imaging on or in front of the retina, so that the driving force of eyeball elongation is cut off, and the purpose of controlling the degree of myopia deepening is achieved.

The concept of peripheral defocus was sorted out and summarized in the actual clinical practice in the field of optometry. Initially, doctors found that the eye axis length and myopia growth rate of some orthokeratology lens wearers were delayed, and then found that peripheral defocus was The role of which forms the theory of peripheral defocus control myopia.

Studies have shown that in order to continuously slow down the growth of the eye axis, the applied myopic defocus intervention should occur within the field of view angle of 20 degrees from the fovea of the retina, and when the applied myopic defocus occurs within the visual field angle of 15 degrees from the fovea of the retina. Works best when inside the corner. Therefore, it is necessary to perform myopic defocus intervention within 15 degrees from the central fovea of the retina, and use a larger defocus amount to achieve the best effect; at the same time, it is necessary to control the range of visual field angles from 15 degrees to 20 degrees from the central macular fovea. adjunctive intervention.

In the prior art, frame glasses designed based on the theory of peripheral defocus myopia prevention and control all adopt a partition structure, and the center is designed as a zero-spherical-aberration optical zone for precise imaging, and the edge is designed as a peripheral defocus control with a diopter higher than the central region. area or astigmatism area. However, the existing defocus lenses have problems with the division of the defocus control area, the size of the defocus amount, and the ratio of the effective micro-convex lens to the defocus control area, resulting in the inability to focus on myopia within a 15-degree field of view angle from the central macular fovea. The effect of strong intervention and the auxiliary intervention effect within the range of 15° to 20° field of view directly affect the prevention and control effect of out-of-focus lenses on myopia.

Contents of the invention

Purpose of the invention: The purpose of the present invention is to address the problems existing in the prior art, and propose a partitioned progressive multi-point defocus type myopia prevention and control lens, which is realized by reasonably setting the number distribution and defocus amount of the micro-convex lenses of the defocus lens Effective prevention and control of myopia.

Technical solution: A partitioned progressive multi-point defocus type myopia prevention and control lens, including a lens body, the two sides of the lens body include an outer surface and an inner surface, and the lens body includes a curved surface composed of the outer surface and the inner surface. The refractive area for correcting visual acuity; the outer surface is regularly and evenly distributed with micro-convex lenses; the optical center of the lens body is provided with a myopia refractive correction area; the periphery of the myopia refractive correction area is composed of micro The convex lens respectively constitutes a strong intervention zone and an auxiliary buffer intervention zone from the optical center to the edge of the lens; the diopter of the micro convex lens in the strong intervention zone is greater than the diopter of the micro convex lens in the auxiliary buffer intervention zone.

The present invention divides the lens into vision-correcting refractive areas through the distribution of micro-convex lenses of different diopters, that is, the central distance clear area, the strong intervention area and the auxiliary buffer intervention area. The in-focus intervention of myopia within the angle, and the auxiliary intervention in the range of 15-20 degrees from the fovea of the retina through the auxiliary buffer intervention zone can effectively control the deepening of myopia.

Preferably, in order to ensure clear and comfortable visual quality, the myopia refractive correction area is a circular area with a diameter of 9-10mm.

Preferably, in order to achieve an effective defocusing effect, the micro-convex lens has a diameter of 0.8-1.6mm and a positive diopter of +2.00D to +5.00D. If the diameter of the micro-convex lens is too small, the light transmission effect is not ideal, and the defocus effect cannot be obtained; if the diameter of the micro-convex lens is large, especially when it is larger than the diameter of the pupil, the image will be imaged if the light transmission is large, resulting in image jumping and poor visual experience. Due to individual differences, the defocus amount is affected by the wearer's eye axis, corneal curvature, and accommodation power, that is, the positive diopter will be controlled between ﹢2.00D to ﹢5.00D to achieve the function of personalized wearing myopia intervention.

Preferably, in order to achieve the intervention effect more effectively and facilitate the processing of the lens, the micro-convex lenses in the strong intervention area and the auxiliary buffer intervention area are distributed in concentric circles.

Preferably, in order to ensure the defocus adjustment intervention effect, the sum of the projected areas of all the micro-convex lenses in the strong intervention area and the auxiliary buffer intervention area accounts for 40%-60% of the sum of the projected areas of the strong intervention area and the auxiliary buffer intervention area. When the proportion of the effective defocus area is too small, the effect of adjustment intervention will be affected, and when the proportion of the area is too large, it will affect the wearing comfort. Therefore, experiments have proved that it is more reasonable to control the proportion of the area between 40% and 60%.

As a preferred option, under the premise of ensuring the intervention adjustment effect, in order to facilitate the design and processing of the lens, the micro-convex lenses are distributed on 13 concentric circles from the center to the edge of the lens; the micro-convex lenses in the 1st to 4th rings on the inner side constitute a strong intervention area; 5-13 circles of micro-convex lenses constitute an auxiliary buffer intervention area; micro-convex lenses on the same circle have the same diopter.

Preferably, in order to further reduce processing difficulty, the distance between the edges of adjacent micro-convex lenses is greater than 0.2mm. When the distance between adjacent micro-convex lenses is too small, the processing difficulty will be increased and the lens quality will be affected.

Preferably, in order to further enhance the effect of buffering discrete interventions in the auxiliary buffer intervention area, the auxiliary buffer intervention area includes a first auxiliary buffer intervention area and a second auxiliary buffer intervention area, and the first auxiliary buffer intervention area is located between the strong intervention area and the second auxiliary buffer intervention area. Between the two auxiliary buffer intervention areas; the diopter of the micro-convex lenses in the first auxiliary buffer intervention area is greater than the diopter of the micro-convex lenses in the second auxiliary buffer intervention area. The auxiliary buffer intervention area can also be divided into more levels of auxiliary buffer intervention areas according to individual differences.

Preferably, in order to ensure that the auxiliary buffer intervention area buffers the discrete intervention effect, the micro-convex lenses of the 5th to 8th circles constitute the first auxiliary buffer intervention area, and the micro-convex lenses of the 9th-13th circle constitute the second auxiliary buffer intervention area. Auxiliary buffer intervention areas at all levels need to have a certain width in order to achieve buffer discrete intervention effect.

Preferably, in order to achieve the effect of personalized wearing of myopia intervention, the positive diopter of the miniature convex lens in the powerful intervention area is +2.50D to +4.50D. Due to the influence of the wearer's eye axis, corneal curvature, and adjustment power, the defocus amount can be set individually; the defocus amount of the auxiliary buffer intervention area decreases step by step.

Beneficial effects: the present invention divides the lens into a central distance clear zone, a strong intervention zone and an auxiliary buffer intervention zone through the distribution of micro-convex lenses of different diopters. Strong defocus intervention, and at the same time, auxiliary intervention in the field angle range of 15 degrees to 20 degrees from the central fovea of the retina through the auxiliary buffer intervention area can effectively control the deepening of myopia; due to the eye axis and corneal curvature of the wearer , The adjustment force affects the defocus amount of the powerful intervention area can be set individually; at the same time, the defocus amount of the auxiliary buffer intervention area decreases step by step to meet the individual needs of myopia patients.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a sectional view of the present invention;

Fig. 2 is a partial enlarged view of the micro-convex lens of the present invention;

Fig. 3 is a schematic diagram of the area division of the present invention;

Fig. 4 is a structural schematic diagram of the distribution of micro-convex lenses of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In describing the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or positional relationship. Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

As shown in Figures 1, 2 and 3, a partitioned progressive multi-point defocus type myopia prevention and control lens includes a lens body 1, and the two sides of the lens body 1 include an outer surface 2 and an inner surface 3, and the lens body 1 includes a refractive area for vision correction formed by the curved surfaces of the outer surface 2 and the inner surface 3; the surface of the outer surface 2 is regularly and evenly distributed with micro-convex lenses 4; the optical center of the lens body 1 is provided with a myopia refractive Optical correction zone 5; the periphery of the myopia refraction correction zone 5 is composed of micro-convex lenses 4 of different diopters from the optical center to the edge of the lens to form a strong intervention zone 6 and an auxiliary buffer intervention zone 7; the micro-convex lenses in the powerful intervention zone 6 4 diopters are greater than the 4 diopters of the micro-convex lens in the auxiliary buffer intervention area 7 .

The present invention divides the lens into vision-correcting refractive regions 5 through the distribution of micro-convex lenses of different diopters, that is, a clear region for central distance use, a strong intervention region 6 and an auxiliary buffer intervention region 7. The myopic defocus intervention applied within the 15-degree field of view angle, and the auxiliary intervention in the range of 15-20 degree field of view angles from the fovea of the retina through the auxiliary buffer intervention area 7 can effectively control the deepening of myopia.

In order to achieve the intervention effect more effectively and facilitate lens processing, the micro-convex lenses 4 in the strong intervention area 6 and the auxiliary buffer intervention area 7 are distributed in concentric circles.

In order to further improve the effect of buffering discrete interventions in the auxiliary buffering intervention area, the auxiliary buffering intervention area 7 includes a first auxiliary buffering intervention area 71 and a second auxiliary buffering intervention area 72, and the first auxiliary buffering intervention area 71 is located in the powerful intervention area 6 Between the second auxiliary buffer intervention area 72 ; the diopter of the micro convex lens 4 in the first auxiliary buffer intervention area 71 is greater than the diopter of the micro convex lens 4 in the second auxiliary buffer intervention area 72 . On the premise of ensuring the buffer intervention effect, the auxiliary buffer intervention area 7 can also be divided into more levels of auxiliary buffer intervention areas according to individual differences.

Embodiment one

As shown in Figure 4, a kind of subregional gradual change multi-point defocusing type myopia prevention and control lens, myopia refraction correction area 5 is a circular area, and diameter is 9mm; The diameter d of described miniature convex lens 4 is 1mm; Miniature convex lens 4 Distributed on 13 concentric circles from the center to the edge of the lens; the micro-convex lens 4 of the inner 1-4 circle forms a strong intervention zone 6; the micro-convex lens 4 of the 5-8 circle forms the first auxiliary buffer intervention zone 71, and the 9- The 13 circles of micro-convex lenses 4 constitute the second auxiliary buffer intervention area 72; the micro-convex lenses 4 on the same circle have the same diopter; the positive diopter of the strong intervention area 6 is +3.50D, and the positive diopter of the first auxiliary buffer intervention area 71 is + 3.00D, the positive diopter of the second auxiliary buffer intervention area 72 is +2.50D; the diameter difference between adjacent circles is 3mm, and the distance between the edges of two adjacent micro-convex lenses 4 in the same circle is 0.2mm; the specific micro-convex lens The distribution of 4 is as follows:

The projected area of a single microconvex lens is: (d/2) ² *π=0.785mm ² ;

The projected area of all microconvex lenses is: 0.785*946=742.987mm ² ;

The sum of the projected areas of the strong intervention area 6 and the auxiliary buffer intervention area 7 is: [(46+1)/2] ² *π-(9/2) ²

*π＝1671.327mm ² ;

The ratio of the projected areas of all micro-convex lenses 4 to the sum of the projected areas of the powerful intervention area 6 and the auxiliary buffer intervention area 7 is: 742.987/1671.327*100=44.5%.

Embodiment two

A partitioned progressive multi-point defocus type myopia prevention and control lens, the myopia refraction correction zone 5 is a circular area with a diameter of 9 mm; the diameter d of the micro-convex lens 4 is 1 mm; the micro-convex lens 4 is distributed from the center to the edge of the lens On 13 concentric circles; the micro-convex lens 4 of the inner 1-4 circle constitutes a strong intervention area 6; the micro-convex lens 4 of the 5-8 circle constitutes the first auxiliary buffer intervention area 71, and the micro-convex lens 4 of the 9-13 circle The second auxiliary buffer intervention area 72 is formed; the diopters of the miniature convex lenses 4 on the same circle are the same; the positive diopter of the powerful intervention area 6 is +4.50D, the positive diopter of the first auxiliary buffer intervention area 71 is +4.00D, and the second auxiliary The positive diopter of the buffer intervention area 72 is +3.50D; the diameter difference between adjacent circles is 2.4mm, and the distance between the edges of two adjacent micro-convex lenses 4 in the same circle is 0.2mm;

The distribution situation of concrete miniature convex lens 4 is as follows:

The projected area of a single microconvex lens is: (d/2) ² *π=0.785mm ² ;

The projected area of all microconvex lenses is: 0.785*946=649.524mm ² ;

The sum of the projected areas of the strong intervention area 6 and the auxiliary buffer intervention area 7 is: [(38.8+1)/2] ² *π-(9/2) ²

*π＝1244.102mm ² ;

The ratio of the projected areas of all micro-convex lenses 4 to the sum of the projected areas of the powerful intervention area 6 and the auxiliary buffer intervention area 7 is: 742.987/1671.327*100=55.0%.

When the proportion of the effective defocus area is too small, it will affect the effect of adjustment intervention. When the proportion of the area is too large, it will affect the wearing comfort. Therefore, under the premise that the production process can be realized, it has been proved by experiments that the proportion of the area is controlled at 40%-60 % is more reasonable.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for relevant details, please refer to the description of the method part.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A partitioned progressive multi-point defocus type myopia prevention and control lens, comprising a lens body (1), the two sides of the lens body (1) comprising an outer surface (2) and an inner surface (3), the lens body (1) includes a refractive area for correcting vision formed by the curved surfaces of the outer surface (2) and the inner surface (3); the surface of the outer surface (2) is regularly and evenly distributed with micro-convex lenses (4); its characteristics In that: the optical center of the lens body (1) is provided with a myopia refraction correction zone (5); the periphery of the myopia refraction correction zone (5) is composed of miniature convex lenses (4) of different diopters from the optical center to the edge of the lens respectively A strong intervention zone (6) and an auxiliary buffer intervention zone (7) are formed; the diopter of the micro convex lens (4) in the strong intervention zone (6) is greater than the diopter of the micro convex lens (4) in the auxiliary buffer intervention zone (7). 2. The partitioned progressive multi-point defocus type myopia prevention and control lens according to claim 1, characterized in that: the myopia refractive correction area (5) is a circular area with a diameter of 9-10 mm. 3. The partitioned progressive multi-point defocus type myopia prevention and control lens according to claim 1, characterized in that: the diameter of the micro-convex lens (4) is 0.8-1.6mm, and the positive diopter is +2.00D to +5.00 d. 4. The partitioned progressive multi-point defocus type myopia prevention and control lens according to claim 1 or 3, characterized in that: the micro-convex lens (4) of the strong intervention area (6) and the auxiliary buffer intervention area (7) are distributed in concentric circles. 5. The partitioned progressive multi-point defocus type myopia prevention and control lens according to claim 1, characterized in that: all the micro-convex lenses (4) projected in the strong intervention area (6) and the auxiliary buffer intervention area (7) The sum of the areas accounts for 40%-60% of the sum of the projected areas of the strong intervention area (6) and the auxiliary buffer intervention area (7). 6. The partitioned progressive multi-point defocus type myopia prevention and control lens according to claim 4, characterized in that: the micro-convex lenses (4) are distributed on 13 concentric circles from the center to the edge of the lens; 4 circles of microconvex lenses (4) form a strong intervention zone (6); the 5th to 13th circles of microconvex lenses (4) form an auxiliary buffer intervention zone (7); the microconvex lenses (4) on the same circle have the same diopter. 7. The partitioned progressive multi-point defocus type myopia prevention and control lens according to claim 6, characterized in that the distance between the edges of the adjacent miniature convex lenses (4) is greater than 0.2mm. 8. The partitioned progressive multi-point defocus type myopia prevention and control lens according to claim 7, characterized in that: the auxiliary buffer intervention area (7) includes a first auxiliary buffer intervention area (71) and a second auxiliary buffer area Intervention area (72), the first auxiliary buffer intervention area (71) is located between the powerful intervention area (6) and the second auxiliary buffer intervention area (72); the micro-convex lens in the first auxiliary buffer intervention area (71) (4) The diopter is greater than the diopter of the micro-convex lens (4) in the second auxiliary buffer intervention area (72). 9. The partitioned progressive multi-point defocus type myopia prevention and control lens according to claim 8, characterized in that: the micro-convex lenses (4) of the 5th to 8th rings constitute the first auxiliary buffer intervention area (71), and the 9th - 13 circles of micro-convex lenses (4) constitute the second auxiliary buffer intervention area (72). 10. The partitioned progressive multi-point defocus type myopia prevention and control lens according to claim 3, characterized in that: the positive diopter of the miniature convex lens (4) in the strong intervention area (6) is +2.50D to +4.50D .

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