Refraction out-of-focus lens

Abstract

The utility model discloses a refractive defocus lens, and relates to the field of spectacle lenses, taking myopia prevention and control as an example, by optimizing the design of a defocus area and positive refractive power of the lens, a first refractive area is arranged in the center of the lens, a second optical defocus area is arranged above the first refractive area, and a third optical defocus area is arranged below the first refractive area; additional refractive power distribution from low to high is presented in the second optical defocus region and the third optical defocus region from the upper part to the lower part of the lens; the first refractive area ensures that external light can be accurately focused on the retina of the eye after passing through the area, the additional refractive power of the third optical defocus area is higher than the refractive power of the second optical defocus area, and when an object is viewed, after reaching the retina above through the near-vision area below the lens, the refractive power more than that of the far-vision area is formed, so that the visual effect is improved. The defocus difference of the upper retina and the lower retina is generated; the regional out-of-focus design meets different out-of-focus requirements formed at the distance and the near, and good myopia control, hyperopia emmetropization and better visual experience are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of eyeglass lenses, and in particular to a refractive defocus lens. Background Art

[0002] When the eye is in a relaxed state of accommodation, parallel light from the outside world enters the eye and its focus falls exactly on the retina, forming a clear image. This is called emmetropia. If it focuses in front of the retina, this results in a lack of a clear image on the retina, which is called myopia. If it focuses behind the retina, this results in a lack of a clear image on the retina, which is called hyperopia. The refractive state in which the focus cannot fall on the retina is refractive error. During the visual development stage of children and adolescents, refractive errors, especially myopia and hyperopia, seriously affect their quality of life and learning outcomes. At the same time, the occurrence of hyperopia can also affect normal visual development and may lead to problems such as amblyopia and strabismus. Glasses, as a commonly used optical correction device, are usually used to treat various types of refractive errors. However, for children, refractive error correction requires not only correcting the abnormal refractive state of the eye, but also suppressing the further development of the abnormal state. One of the key theories for myopia prevention and control is the optical defocus theory. Currently, there are many designs of myopia prevention and control lenses based on the optical defocus theory. Their basic structure mainly includes two key parts: the central visual distance zone and the peripheral optical defocus zone. The central visual distance zone of this type of lens can ensure that the image of the object is focused on the retina of the eye, thereby ensuring the clarity of visual identification of objects, while the peripheral optical defocus zone can focus the image in front of the retina of the eye, while forming a certain degree of myopic defocus, thereby suppressing the progression of myopia. In addition, by designing the peripheral optical defocus zone, the focus is focused behind the retina, forming hyperopic defocus, which helps to improve the progression of hyperopia and promote normal visual development. Although existing myopia and hyperopia correction lenses based on the optical defocus theory have achieved certain results, the suppression effect is still not ideal in some children with myopia. Summary of the Invention

[0003] In order to solve the above technical problems, the present application provides a refractive defocus lens that can effectively improve the effect of suppressing and preventing myopia.

[0004] The technical solutions provided in this application are as follows:

[0005] A refractive defocus lens has a first refractive zone in the center for correcting refractive errors, a second optical defocus zone for far vision above the first refractive zone, and a third optical defocus zone for near vision below the first refractive zone; the defocus formed by the third optical defocus zone is stronger than that of the second optical defocus zone.

[0006] Furthermore, the second optical defocus area and the third optical defocus area form differential defocus as a whole, or present an additional refractive power distribution from low to high from the top to the bottom of the lens.

[0007] Furthermore, the defocus formed by the third optical defocus area is stronger than that of the second optical defocus area; the defocus positive refractive power added by the second optical defocus area is lower than that of the third optical defocus area, including but not limited to the second optical defocus area and the third optical defocus area forming a differential defocus as a whole, or adopting a progressively increasing positive refractive power setting;

[0008] Alternatively, the additional defocus negative refractive power (absolute value) of the second optical defocus zone is lower than that of the third optical defocus zone, including but not limited to the second optical defocus zone and the third optical defocus zone forming a differential defocus as a whole, or adopting a gradually increasing negative refractive power absolute value setting.

[0009] Furthermore, the second optical defocusing area and the third optical defocusing area are composed of micro lenses or cylindrical lenses.

[0010] Furthermore, the shape of the first refractive area is a geometric shape such as a circle, an ellipse, a rectangle, a regular polygon, etc.

[0011] Furthermore, the surface shape of the second optical defocus area facing the object side includes convex, concave or a combination of convex and concave; the surface shape of the third optical defocus area facing the object side includes convex, concave or a combination of convex and concave.

[0012] Furthermore, the second optical defocus zone is composed of independent microlenses or cylindrical lenses with a diameter of 0.6-1.5 mm, and the distance between the center points of two adjacent microlenses or cylindrical lenses is 0.7 mm to 4.0 mm; the third optical defocus zone is composed of independent microlenses or cylindrical lenses with a diameter of 0.6-1.5 mm, and the distance between the center points of two adjacent microlenses or cylindrical lenses is 0.7 mm to 4.0 mm.

[0013] Furthermore, the distribution ratio of the second optical defocus area to the third optical defocus area varies between 10% and 90%.

[0014] The present application provides a refractive defocus lens, which optimizes the design of the defocus area and refractive power of the lens, wherein a first refractive zone is set in the center of the lens, a second optical defocus zone (far vision defocus zone) is set above the first refractive zone, a third optical defocus zone (near vision defocus zone) is set below the first refractive zone, and the second and third optical defocus zones present an additional refractive power distribution from low to high from the top to the bottom of the lens; the first refractive zone ensures that external light can be accurately focused on the retina of the eye after passing through the zone, and the defocus refractive power added by the third optical defocus zone is higher than the refractive power of the second optical defocus zone. When viewing objects, after passing through the near vision zone below the lens and reaching the upper retina, a brighter defocusing area is formed than that of the far vision zone. More refractive power, resulting in a defocus difference between the upper retina and the lower retina; this regional defocus design can better meet the different defocus needs of far and near, thereby achieving better myopia and hyperopia control effects and a better visual experience; the refractive defocus lenses of the present application can achieve accurate vision correction, myopia prevention and control, and promote hyperopia emmetropization in different refractive zones. The first refractive zone provides basic vision correction to ensure a clear visual experience. The second optical defocus zone and the third optical defocus zone achieve different degrees of defocus for far and near vision through different refractive power distributions, inhibit the progression of myopia, promote hyperopia emmetropization, and at the same time improve the wearer's visual comfort at different viewing distances. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the first planar structure of the refractive defocus lens provided in this application;

[0017] Figure 2 A schematic diagram of the second planar structure of the refractive defocus lens provided in this application;

[0018] Figure 3 This is a schematic diagram of a third planar structure of the refractive defocus lens provided in this application;

[0019] Figure 4 This is a schematic diagram of the fourth planar structure of the refractive defocus lens provided in this application;

[0020] Figure 5 This is a schematic diagram of the fifth planar structure of the refractive defocus lens provided in this application;

[0021] Among them, 1. the first refractive zone, 2. the second optical defocus zone, 3. the third optical defocus zone. DETAILED DESCRIPTION

[0022] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0023] It should be noted that when an element is referred to as being “fixed on” or “set on” another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0026] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0027] The embodiments of the present application are written in a progressive manner.

[0028] like Figures 1 to 5As shown, a refractive defocus lens has a first refractive zone 1 in the center for correcting refractive error, a second optical defocus zone 2 for distance vision above the first refractive zone, and a third optical defocus zone 3 for near vision below the first refractive zone. The third optical defocus zone produces a stronger defocus than the second optical defocus zone. The second and third optical defocus zones form a differential defocus overall, or exhibit a distribution of added refractive power from low to high from the top to the bottom of the lens.

[0029] In the above scheme, by optimizing the design of the defocus area and refractive power of the lens, a second optical defocus area (far vision defocus area) is set above the first refractive area, and a third optical defocus area (near vision defocus area) is set below the first refractive area, and the second and third optical defocus areas present an additional refractive power distribution from low to high from the top to the bottom of the lens; the first refractive area ensures that the external light can be accurately focused on the retina of the eye after passing through the area, and the defocus refractive power added by the third optical defocus area is higher than the refractive power of the second optical defocus area. When viewing objects, after passing through the near vision area below the lens and reaching the upper retina, it forms more refractive power than the far vision area, producing an upper vision The defocus difference between the retina and the underlying retina; this regional defocus design can better meet the different defocus requirements for far and near vision, thereby achieving better myopia and hyperopia control effects and a better visual experience; the refractive defocus lenses of the present application can achieve precise vision correction, myopia prevention and control, and promote the emmetropization of hyperopia in different refractive zones. The first refractive zone provides basic vision correction to ensure a clear visual experience. The second optical defocus zone and the third optical defocus zone achieve different degrees of defocus for far and near vision through different refractive power distributions, inhibit the progression of myopia, promote the emmetropization of hyperopia, and at the same time improve the wearer's visual comfort at different viewing distances.

[0030] As a preferred embodiment, the additional positive refractive power of the second optical defocus zone is lower than that of the third optical defocus zone, including but not limited to the second optical defocus zone and the third optical defocus zone forming differential defocus as a whole, or adopting a progressively increasing positive refractive power setting; forming differentiated defocus above and below the lens to better adapt to different vision needs, the positive refractive power of the lower defocus zone is higher than that of the upper defocus zone, forming an overall differential defocus or a progressively increasing change mode, forming a differentiated defocus or gradient defocus state above and below the retina, providing fine vision correction while effectively inhibiting the progression of myopia. Specifically, the first refractive area ensures that external light can be accurately focused on the retina of the eye after passing through the area, the second optical defocus area focuses the image in front of the lower retina of the eye, and the third optical defocus area focuses the image in front of the upper retina of the eye, and the defocus refractive power added by the third optical defocus area is higher than the refractive power of the second optical defocus area, and the point formed by the third optical defocus area is located in front of the point formed by the second optical defocus area; when viewing objects, after passing through the near vision area below the lens and reaching the upper retina, it forms more positive refractive power than the far vision area, resulting in the upper retina and the lower retina. defocus difference; this regional defocus design can better meet the different defocus requirements for far and near, thereby achieving better myopia control effect and better visual experience; the refractive defocus lens of the present application can achieve precise vision correction and myopia prevention and control effects in different refractive zones. The first refractive zone provides basic vision correction to ensure a clear visual experience. The second optical defocus zone and the third optical defocus zone achieve different degrees of myopic defocus for far and near vision through different refractive power distributions, inhibit the development of myopia, and improve the wearer's visual comfort at different viewing distances.

[0031] Alternatively, the added negative refractive power (absolute value) of the second optical defocus zone is lower than that of the third optical defocus zone, including but not limited to forming differential defocus between the second and third optical defocus zones as a whole, or adopting a progressively increasing negative refractive power setting. Specifically, the first refractive zone is set in the center of the lens, the second optical defocus zone is set above the first refractive zone, and the third optical defocus zone is set below the first refractive zone, and the added negative refractive power in the second and third optical defocus zones is distributed from low to high from the top to the bottom of the lens. The first refractive area ensures that the external light can be accurately focused on the retina of the eye after passing through this area, the second optical defocus area focuses the image behind the lower retina of the eye, and the third optical defocus area focuses the image behind the upper retina of the eye, and the absolute value of the defocus negative refractive power added by the third optical defocus area is higher than the absolute value of the negative refractive power of the second optical defocus area, and the point formed by the third optical defocus area is located behind the point formed by the second optical defocus area; when viewing objects, the near vision area below the lens reaches the upper retina, forming more negative refractive power than the far vision area. Through the above design, the refractive defocus lens of the present application can achieve different degrees of hyperopic defocusing for far and near vision during the viewing process, promote the emmetropization process of hyperopia, and provide better vision correction and treatment solutions.

[0032] As a preferred embodiment, the surface shape of the second optical defocus zone facing the object side includes convex, concave or a combination of convex and concave; the surface shape of the third optical defocus zone facing the object side includes convex, concave or a combination of convex and concave; for example, in the second optical defocus zone, the front surface is convex toward the object side, and the rear surface is concave toward the object side.

[0033] Preferably, the second optical defocus zone and the third optical defocus zone are composed of microlenses or cylindrical lenses. The shape of the first refractive zone is a geometric shape such as a circle, an ellipse, a rectangle, a regular polygon, etc. Specifically, as a feasible way, a circular area with a radius of 3mm-20mm is set in the center of the lens, and covers other areas except the optical defocus zone set by the microlens array, cylindrical lens array or concentric circles; the second optical defocus zone is composed of independent microlenses or cylindrical lenses with a diameter of 0.6-1.5mm, and the distance between the center points of two adjacent microlenses or cylindrical lenses is 0.7mm to 4.0mm; the third optical defocus zone is composed of independent microlenses or cylindrical lenses with a diameter of 0.6-1.5mm, and the distance between the center points of two adjacent microlenses or cylindrical lenses is 0.7mm to 4.0mm. The difference in refractive power between the second optical defocus zone and the third optical defocus zone causes the positive refractive power of the third optical defocus zone to be higher than that of the second optical defocus zone, and the additional amount ranges from 0.5D to 10.0D; the diameter of each microlens can be set to be the same, or it can be set to have a diameter that increases radially outward; by adjusting its diameter, center point spacing and arrangement, areas of different refractive power are formed, so that the refractive power in the two optical areas is distributed from low to high. The arrangement of microlenses or cylindrical lenses can be a regular array or a random distribution; the microlenses or cylindrical lenses are arranged in a regular array to provide a uniform refractive power distribution, which is conducive to achieving a smooth vision transition; the microlenses or cylindrical lenses are also randomly distributed, which is conducive to avoiding regular errors in vision and improving the naturalness and comfort of vision. In this embodiment, the second optical defocus zone and the third optical defocus zone are both in the form of microlenses, and the design parameters of the microlenses are as follows:

[0034] Lens type: can be convex or concave; Design surface type: includes spherical, aspheric, toric or non-toric; Shape: can be spherical, elliptical, cylindrical or regular polygonal.

[0035] As a preferred embodiment, the distribution ratio of the second optical defocus area and the third optical defocus area varies between 10% and 90%. Specifically:

[0036] Figure 1In the plan view of the refractive defocus lens shown, the first refractive area and the second and third optical areas adopt different proportions; the first refractive area is designed to be a geometric shape such as a circle or an ellipse, and is used for basic vision refractive correction; the third optical defocus area covers the bottom of the lens, which is the vast majority of the area of ​​optical incidence during close reading, forming defocus in the near vision area, which has a strong myopia prevention and control effect or promotes emmetropia of hyperopia; the second optical defocus area is located in the area other than the third optical defocus area, and is used to form defocus in the far vision area; the ratio of the second optical defocus area to the third optical defocus area is approximately 25% to 75%; it can be understood that the distribution ratio range of the second optical defocus area and the third optical defocus area can float between 10%-90%.

[0037] Figure 2 In the plan view of the refractive defocus lens shown, the ratio of the second optical defocus zone to the third optical defocus zone is approximately 50% to 50%, and this partition ratio of the two can be any value between 10% and 90%; the distribution of the two optical areas is obliquely symmetrical, and of course, oblique symmetry, top-to-bottom symmetry or other asymmetrical designs can also be adopted to adapt to and optimize the correction effect of different users.

[0038] Figure 3 In the plan view of the refractive defocus lens shown, the ratio of the second optical defocus zone to the third optical defocus zone is also 50% to 50%. This partition ratio of the two can be any value between 10% and 90%, and the distribution of the two optical areas is symmetrical in the upper and lower forms; in particular, the second optical defocus zone and the third optical defocus zone do not completely fill the lens area outside the first refractive zone to meet the needs of different users.

[0039] Figure 4 In the plan view of the refractive defocus lens shown, the second and third optical zones may not completely cover all areas except the first refractive zone, and the ratio of the two areas may vary between 10% and 90%.

[0040] Figure 5 In the plan view of the refractive defocus lens shown, the second and third optical zones may not completely cover all areas except the first refractive zone, and the ratio of the two areas may vary between 10% and 90%; a microcylindrical concentric circle structure is formed between the first refractive zone and the second and third optical zones, and the diameters of the concentric circles in the two areas can be set to be the same or increase radially outward. The positive refractive power (or the absolute value of the negative refractive power) of the third optical defocus zone is higher than that of the second optical defocus zone, and the addition range is 0.5D to 10.0D.

[0041] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one 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 present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A refractive defocus lens, characterized in that: A first refractive zone for correcting refractive errors is provided in the center of the lens, a second optical defocus zone for far vision is provided above the first refractive zone, and a third optical defocus zone for near vision is provided below the first refractive zone; the defocus formed by the third optical defocus zone is stronger than that of the second optical defocus zone.

2. The refractive defocus lens according to claim 1, wherein: The second optical defocus area and the third optical defocus area form differential defocus as a whole, or present an additional refractive power distribution from low to high from the top to the bottom of the lens.

3. The refractive defocus lens according to claim 2, wherein: The positive refractive power added by the second optical defocus zone is lower than the positive refractive power added by the third optical defocus zone, and the two optical zones form a differential defocus as a whole, or adopt a progressively increasing positive refractive power setting; Alternatively, the absolute value of the negative refractive power added to the second optical defocus zone is lower than the absolute value of the negative refractive power added to the third optical defocus zone, and the two optical intervals form differential defocus as a whole, or a gradually increasing absolute value setting of the negative refractive power is adopted.

4. The refractive defocus lens according to any one of claims 1 to 3, wherein: The second optical defocusing area and the third optical defocusing area are composed of micro lenses or cylindrical lenses.

5. The refractive defocus lens according to claim 4, wherein: The shape of the first refractive area is any one of a circle, an ellipse, a rectangle and a regular polygon.

6. The refractive defocus lens according to claim 4, wherein: The surface shape of the second optical defocus area facing the object side includes convex, concave or a combination of convex and concave; the surface shape of the third optical defocus area facing the object side includes convex, concave or a combination of convex and concave.

7. The refractive defocus lens according to claim 4, wherein: The second optical defocus zone is composed of independent microlenses or cylindrical lenses with a diameter of 0.6-1.5mm, and the distance between the center points of two adjacent microlenses or cylindrical lenses is 0.7mm to 4.0mm; the third optical defocus zone is composed of independent microlenses or cylindrical lenses with a diameter of 0.6-1.5mm, and the distance between the center points of two adjacent microlenses or cylindrical lenses is 0.7mm to 4.0mm.

8. The refractive defocus lens according to claim 4, wherein: The distribution ratio of the second optical defocus area and the third optical defocus area varies between 10% and 90%.

Images