Myopia prevention and control glasses

Abstract

The myopia prevention and control glasses comprise a first lens and a second lens which are distributed in the first direction, and each of the first lens and the second lens is provided with a clear area and an out-of-focus area. Due to the position distribution of the clear areas and the defocus areas, the sight lines of the two eyes of a wearer simultaneously pass through the clear area of the first lens and the defocus area of the second lens and fall at the same position, or simultaneously pass through the defocus area of the first lens and the clear area of the second lens and fall at the same position. Therefore, the light is prevented from simultaneously passing through the defocus areas of the two lenses. The design is based on an out-of-focus principle, the out-of-focus degree is + 1.0 D to + 5.0 D, ocular axis extension can be inhibited, the myopia progress of teenagers can be slowed down, and meanwhile the problem of visual discomfort can be reduced. Through test verification of the eye tracker, a fixation line is prevented from simultaneously passing through the defocus areas of the two lenses at different fixation angles, and clear vision and prevention and control effects are considered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of myopia prevention and control, and in particular to a myopia prevention and control glasses based on binocular differential defocus. BACKGROUND

[0002] In recent years, myopia has become a serious public health problem, and the prevalence of myopia among children and adolescents worldwide is rising, accompanied by a variety of myopia control glasses.

[0003] In the prior art, the lenses of myopia prevention and control glasses include lenses based on multi-zone positive optical defocus technology and lenses based on high asphericity micro-lens technology. The lens based on multi-zone positive optical defocus technology has a circular area in the center, which has the complete refractive correction power of the wearer and is used to correct distance vision. Outside the central optical zone, there is a treatment area composed of multiple small circular defocus zones. These defocus zones are arranged closely in a honeycomb shape and spread throughout the middle and outer parts of the lens. The lens based on high asphericity micro-lens technology has multiple concentric circular rings composed of asphericity micro-lenses distributed around the central optical zone.

[0004] However, the myopia prevention and control glasses in the prior art, including lenses based on multi-zone optical defocus, such as DIMS (Defocus Incorporated Multiple Segments, multi-zone positive optical defocus lenses), usually adopt a symmetrical design, which may cause gaze aberration through the lenses at different gaze angles, or may cause discomfort and blurred vision during the process of optical measurement based on a simulated eye movement model, as both lenses may gaze at the defocus zone at the same time. Some lenses with asymmetrical design are designed for nasal-temporal differences, but they do not solve the problem of discomfort caused by simultaneous defocus of both eyes.

[0005] The present application provides a myopia prevention and control glasses based on binocular differential defocus design, which avoids simultaneous defocus of both eyes through the defocus zone, reduces parallax problems, and achieves myopia prevention and control. SUMMARY

[0006] Therefore, it is necessary to provide a myopia prevention and control glasses that can avoid the wearer's simultaneous gaze at the defocus zone through both lenses.

[0007] In a first aspect, the present application provides a myopia prevention and control glasses, which adopts the following technical solution:

[0008] The myopia prevention and control glasses include a first lens and a second lens arranged along a first direction; the first lens and the second lens are respectively provided with a clear area and a defocus area, and the clear area and the defocus area are arranged such that the visual lines of the wearer's eyes pass through the clear area of the first lens and the defocus area of the second lens at the same time or pass through the defocus area of the first lens and the clear area of the second lens at the same time, so as to form binocular differential defocus and avoid the visual lines of the wearer's eyes passing through the defocus area at the same time.

[0009] In one of the embodiments, the clear area includes a first clear area and a second clear area,

[0010] The first clear area is arranged at the center of the first lens and the second lens, and the second clear area is in communication with the first clear area and extends a preset length in the first direction or the opposite direction of the first direction.

[0011] The defocus area is arranged around the first clear area and the second clear area.

[0012] In one of the embodiments, the second clear area in each of the first lens and the second lens is arranged close to the nasal side of the wearer to adapt to the nasal side fixation preference when using eyes at a close distance and avoid binocular visual discomfort.

[0013] In one of the embodiments, the second clear area in each of the first lens and the second lens is arranged close to the temporal side of the wearer as an alternative to the nasal side arrangement to adapt to different eye use habits.

[0014] In one of the embodiments, the clear area is arranged at the center of the first lens and the second lens, and the defocus area includes a plurality of first defocus areas, each of which is arranged with the clear area, and the distribution of the defocus area of the first lens and the second lens is complementary.

[0015] In one of the embodiments, each of the first defocus areas is arranged along the first direction, and each of the first defocus areas in the first lens is arranged alternately with each of the first defocus areas in the second lens.

[0016] In one of the embodiments, each of the first defocus areas is arranged at the lower half of the clear area to enhance the downward defocus signal when reading at a close distance.

[0017] In one of the embodiments, the defocus area further includes a second defocus area, the second defocus area is arranged around the clear area, and the corresponding defocus degree of the second defocus area is between +1.0D and +5.0D.

[0018] In one of the embodiments, the clear zone includes a third clear zone and a plurality of fourth clear zones, and the defocus zone includes a plurality of third defocus zones; the myopia prevention and control glasses include an array zone, in which the third defocus zones and the fourth clear zones are staggered and arranged in a rectangular array along the first direction and the second direction, the array zone is adjacent to the third clear zone, and the array zone distribution of the first lens and the second lens is complementary.

[0019] In one of the embodiments, the third defocus zone includes defocus microlenses with a defocus degree of +1.0D to +5.0D.

[0020] In one of the embodiments, in the first lens and the second lens, the refractive power of the defocus zone gradually increases or stepwise increases from the lens center to the lens edge.

[0021] In one of the embodiments, the first defocus zone is rectangular, trapezoidal or elliptical to optimize the peripheral light distribution and visual comfort.

[0022] The myopia prevention and control glasses described above include a first lens and a second lens arranged along the first direction, and the first lens and the second lens are both provided with a clear zone and a defocus zone. The position distribution of the clear zone and the defocus zone is such that the visual lines of the wearer's two eyes simultaneously pass through the clear zone of the first lens and the defocus zone of the second lens to fall on the same position, or simultaneously pass through the defocus zone of the first lens and the clear zone of the second lens to fall on the same position. The myopia prevention and control glasses provided in the present application can avoid the problem of light passing through the defocus zone of both lenses at the same time under the condition of testing the wavefront aberration passing through the lens at different gaze angles by a refractive power measuring instrument, a wavefront sensor or an adaptive optical instrument, or based on optical measurement of an analog eye movement model, so that the visual line of one eye of the wearer passes through the clear zone and the visual line of the other eye passes through the defocus zone. Through this differential defocus of the two eyes and the design of the divided regions, the problem of the wearer's two eyes simultaneously passing through the defocus region can be avoided on the basis of myopia prevention and control, and the problem of visual discomfort can be avoided, so that the visual clarity of the wearer is maintained while ensuring the effect of myopia prevention and control. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1(a) is a schematic diagram of the lens structure of myopia prevention and control glasses with a clear zone on the nasal side in one embodiment;

[0024] Figure 1(b) is a schematic diagram of the lens structure of myopia prevention and control glasses with a clear zone on the temporal side in one embodiment;

[0025] Figure 2 Figure 2 is a schematic diagram of the lens structure of myopia prevention and control glasses including a first defocus zone in one embodiment;

[0026] Figure 3 Figure 3 is a schematic diagram of the lens structure of myopia prevention and control glasses including a second defocus zone in one embodiment; Figure 2 Figure 4 is a schematic diagram of the lens of myopia prevention and control glasses and the visual line of the wearer;

[0027] Figure 4 A schematic diagram of a lens structure of myopia prevention and control glasses including an array region in an embodiment is shown.

[0028] Brief Description of the Drawings

[0029] 1, first lens; 2, second lens; 3, clear region; 31, first clear region; 32, second clear region; 33, third clear region; 4, defocus region; 41, first defocus region; 42, second defocus region. DETAILED DESCRIPTION

[0030] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by persons skilled in the art without departing from the spirit and scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0033] In the present application, unless specifically defined otherwise, if there is a description of a first feature "on" or "under" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "over", "above" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0034] In the present application, unless specifically defined otherwise, if there is a description of a first feature "on" or "under" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "over", "above" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0035] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a mediating element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a mediating element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0036] In the embodiments of the present application, the first direction refers to the direction indicated by the arrow marked "first direction" in the drawing, and the second direction refers to the direction indicated by the arrow marked "second direction" in the drawing. The line of sight of the wearer in the embodiments of the present application can be realized by optical simulation.

[0037] The embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0038] The myopia prevention glasses provided by an embodiment of the present application include first lenses 1 and second lenses 2 arranged in a first direction, and the first lenses 1 and the second lenses 2 are respectively provided with clear zones 3 and defocus zones 4. The distribution positions of the clear zones 3 and the defocus zones 4 are such that the lines of sight of the wearer's eyes pass through the clear zone 3 of the first lens 1 and the defocus zone 4 of the second lens 2 at the same time, or pass through the defocus zone 4 of the first lens 1 and the clear zone 3 of the second lens 2 at the same time, thereby avoiding the lines of sight of the wearer's eyes passing through the defocus zones at the same time.

[0039] The clear zone 3 is arranged in the high-frequency gaze area of the first lens 1 and the second lens 2. For example, the clear zone 3 can be the central area of the first lens 1 and the second lens 2. For another example, the clear zone 3 can be designed as an area that is tilted at a preset angle compared to the central area of the first lens 1 and the second lens 2 according to the difference between the far vision and near vision pupil distance of the human eye. The defocus zone 4 is arranged in the peripheral area of the clear zone 3.

[0040] The clear zone in the embodiment of the present application is an optical zone that meets the refractive correction degree of the wearer; the defocus zone includes positive refractive lenses. The closely arranged defocus lenses with higher positive refractive power than the clear zone 3 generate retinal myopic defocus, so that the retinal image falls in front of the retina or on the retina, reduces hyperopic defocus, creates myopic defocus, inhibits excessive growth of the eye axis, effectively slows down the development of myopia, and thus plays a role in preventing and controlling myopia.

[0041] In a possible implementation, in the first lens and the second lens, the refractive power of the defocus zone 4 gradually increases or increases in steps from the center of the lens to the edge of the lens. For example, the center of the defocus zone 4 is close to one side of the clear zone 3, and the edge is away from the other side of the clear zone 3. From the center to the edge, the refractive power gradually increases or increases in steps from +3.0 D to +5.0 D.

[0042] The myopia prevention glasses provided in the embodiment of the present application can avoid the problem that light passes through the defocus zones 4 of the two lenses at the same time under the condition of testing the refractive power or wavefront aberration passing through the lenses at different gaze angles by a refractive power measuring instrument, a wavefront sensor or an adaptive optical instrument, or optical measurement based on a simulated eye movement model, that is, the gaze of one eye of the wearer passes through the clear zone 3 and the gaze of the other eye passes through the defocus zone 4 even in the near vision field. Through the design of differential defocus and different regions of the two eyes, the problem of visual discomfort caused by the wearer's two eyes simultaneously gazing at the defocus zone through the two lenses can be avoided on the basis of myopia prevention, and the visual clarity of the wearer is ensured while the myopia prevention effect is ensured.

[0043] FIG. 1(a) shows a schematic diagram of the lens structure of the nasal clear zone myopia prevention glasses in an embodiment of the present application; FIG. 1(b) shows a schematic diagram of the lens structure of the temporal clear zone myopia prevention glasses in an embodiment of the present application. The clear zone 3 in the myopia prevention glasses provided in the embodiment of the present application includes a first clear zone 31 and a second clear zone 32, the first clear zone 31 is arranged in the center of the first lens 1 and the second lens 2, the second clear zone 32 is in communication with the first clear zone 31 and extends in the first direction or the opposite direction of the first direction by a preset length; the defocus zone 4 is arranged around the first clear zone 31 and the second clear zone 32.

[0044] The first clear zone 31 can be semi-circular, semi-elliptical or approximately triangular. In some embodiments, the first clear zone 31 can be arcuate. The first clear zone 31 can provide normal refractive correction for the wearer to obtain clear distance and near vision.

[0045] Exemplarily, in the perspective of FIG. 1(a), the first clear zone 31 in the first lens 1 is left semi-circular, and the first clear zone 31 in the second lens 2 is right semi-circular. The diameter of the first clear zone 31 can range from 5 mm to 11 mm. Preferably, the diameter of the first clear zone 31 can be 6 mm.

[0046] In some embodiments, the second clear zone 32 can be approximately trapezoidal or approximately sectorial annular. The short side of the second clear zone 32 coincides with the chord side of the first clear zone 31. In FIG. 1(a), the second clear zone 32 in the first lens 1 extends by a preset length in the first direction, and the second clear zone 32 in the second lens 2 extends by a preset length in the opposite direction of the first direction. Exemplarily, the short side of the second clear zone 32 can be 9 mm, and the arc length of the long side of the second clear zone 32 can be 15 mm.

[0047] In some embodiments, the defocus zone 4 can be approximately annular. The defocus zone 4, together with the first clear zone 31 and the second clear zone 32, forms a complete circular optical zone.

[0048] In a possible implementation, referring to FIG. 1(a), the second clear zone 32 in the first lens 1 and the second lens 2 is arranged close to the nasal side of the wearer to adapt to the nasal side fixation preference when using eyes at close range, thereby avoiding binocular vision discomfort.

[0049] In the perspective of FIG. 1(a), the second clear zone 32 in the first lens 1 and the second lens 2 is located at the nose pad side of the glasses. When the visual lines of the two eyes of the wearer fall on the same position in the close range field of view, such as the target position indicated by the dot mark in FIG. 1(a), the visual line of one eye of the wearer passes through the clear zone 3 of the first lens 1, as indicated by the thick arrow in FIG. 1(a); and the visual line of the other eye passes through the defocus zone 4 of the second lens 2, as indicated by the thin arrow in FIG. 1(a).

[0050] In a possible implementation, referring to FIG. 1(b), the second clear zone 32 in the first lens 1 and the second lens 2 is arranged close to the temporal side of the wearer as an alternative to the nasal side arrangement to adapt to different eye habits.

[0051] In the perspective of FIG. 1(b), the second clear zone 32 in the first lens 1 and the second lens 2 are both located at the temple side of the glasses, when the visual lines of the wearer's two eyes fall on the same position in the near distance field, such as the target position indicated by the dot mark in FIG. 1(b), the visual line of one eye of the wearer passes through the defocus zone 4 of the first lens 1, as indicated by the thinner arrow in FIG. 1(b); the visual line of the other eye passes through the clear zone 3 of the second lens 2, as indicated by the thicker arrow in FIG. 1(b).

[0052] In some embodiments, the first lens 1 is of an asymmetric design or a non-fully symmetric design, and the second lens 2 is mirror-symmetric to the first lens 1, that is, the extension direction of the second clear zone 32 in the first lens 1 can deviate from the first direction by a preset angle clockwise, and the extension direction of the second clear zone 32 in the second lens 2 can deviate from the first direction by a preset angle counterclockwise.

[0053] In the myopia prevention and control glasses in the embodiments of the present application, the first lens 1 is of an asymmetric design, and the visual line of the wearer can switch between the clear zone 3 and the defocus zone 4 of the first lens 1 when the visual line moves; the second lens 2 is mirror-symmetric to the structure of the first lens 1, and can realize that the visual lines of the two eyes of the wearer fall on the same position through the clear zone 3 of the first lens 1 and the defocus zone 4 of the second lens 2 at the same time, or fall on the same position through the defocus zone 4 of the first lens 1 and the clear zone 3 of the second lens 2 at the same time, thereby avoiding the problem of defocus of both eyes of the wearer at the same time.

[0054] Figure 2 The lens structure diagram of the myopia prevention and control glasses including the first defocus zone 41 in an embodiment of the present application is shown. In the myopia prevention and control glasses provided by the embodiment of the present application, the clear zone 3 is arranged at the center of the first lens 1 and the second lens 2, the defocus zone 4 includes a plurality of first defocus zones 41, each first defocus zone 41 is arranged interspersed with the clear zone 3, and the first defocus zones in the first lens and the first defocus zones in the second lens are complementary in distribution.

[0055] The clear zone 3 can be semicircular, semi-elliptical or approximately triangular. The first defocus zone 41 can be an elongated strip-shaped region with defocus capability. For example, the first defocus zone 41 can be a rectangular region as shown in FIG. 1(c), or a trapezoidal region with inconsistent upper and lower widths, or a parallelogram region with a certain inclination angle, or an elliptical region, so as to optimize the peripheral light distribution and visual comfort. Figure 2

[0056] In some embodiments, the first defocus zone 41 includes a plurality of defocus micro-lenses, and the refractive power of each defocus micro-lens can be a constant or progressive positive additional power of +1.50D to +3.50D. For example, the first defocus zone 41 includes defocus micro-lenses with a refractive power of +3.5D.​

[0057] In a possible implementation, as shown in Figure 2 each first defocus zone 41 is arranged along a first direction, and each first defocus zone 41 in the first lens 1 is staggered with each first defocus zone 41 in the second lens 2.

[0058] The staggering means that, in the projection of each first defocus zone 41 in the first lens 1, each first defocus zone 41 in the first lens 1 falls in the gap between each first defocus zone 41 in the second lens 2; in the projection of each first defocus zone 41 in the second lens 2, each first defocus zone 41 in the second lens 2 falls in the gap between each first defocus zone 41 in the first lens 1.

[0059] When the visual lines of the two eyes of the wearer fall on the same position in the near distance field, such as the target position represented by the midpoint mark, the visual line of one eye of the wearer passes through the first defocus zone 41 of the first lens 1, such as the gaze line represented by the thinner arrow in Figure 2 ; the visual line of the other eye passes through the clear zone 3 of the second lens 2, such as the gaze line represented by the thicker arrow in Figure 2 Figure 2

[0060] Figure 3 The schematic diagram of the visual line of the wearer in an embodiment of the present application is shown, in which the gaze line represented by the thicker arrow is the visual line passing through the clear zone 3 or the light ray simulating the visual line; the gaze line represented by the thinner arrow is the visual line passing through the first defocus zone 41 or the light ray simulating the visual line. As shown in Figure 3 , in the myopia prevention and control glasses provided in the embodiment of the present application, there are four cases A, B, C and D for the visual line of the wearer during wearing, in case A, the visual line of the wearer passes through the first defocus zone 41 of the first lens 1 and the clear zone 3 of the second lens 2; in case C, the visual line of the wearer passes through the clear zone 3 of the first lens 1 and the first defocus zone 41 of the second lens 2, in these two cases, one eye experiences therapeutic defocus, and the other eye maintains clear vision. In case B, the visual line of the wearer passes through the clear zone 3 of the first lens 1 and the clear zone 3 of the second lens 2. Only in case D, the visual line of the wearer passes through the defocus zone 4. The probability of binocular defocus of the myopia prevention and control glasses provided in the embodiment of the present application is lower than 25%.

[0061] In a possible implementation, each first defocus zone 41 is arranged in the middle part, upper half or lower half of the clear zone 3.

[0062] Preferably, each first defocus zone 41 is arranged in the lower half of the clear zone 3, so as to enhance the lower defocus signal during near reading.

[0063] ​​The length of the first defocused area 41 in the second direction can be equal to or close to half the length of the sharp area 3.

[0064] In this embodiment, the first defocus zone 41 is located in the lower half of the clear zone 3, which is more suitable for application scenarios requiring near vision, such as reading and other close-range work scenarios. When the wearer looks at a distance, their line of sight passes through the clear zone 3. When near vision is required, the line of sight of one eye passes through the first defocus zone 41, and the line of sight of the other eye passes through the clear zone 3, thereby achieving a balance between therapeutic defocus and visual comfort.

[0065] In some embodiments, each first defocus area 41 is interspersed with the sharp area 3, and the length of each first defocus area 41 in the second direction may be equal to or close to the length of the sharp area 3. The first defocus area is rectangular, trapezoidal, or elliptical to optimize the distribution of peripheral light and visual comfort.

[0066] In one possible implementation, the defocus area 4 further includes a second defocus area 42, which surrounds the sharp area 3, and the defocus degree corresponding to the second defocus area can be between +1.0D and +5.0D.

[0067] In this embodiment, each of the first defocus zones 41 and the clear zone 3 is interspersed, so that the wearer's line of sight falls on the same position through the clear zone 3 of the first lens 1 and the defocus zone 4 of the second lens 2 at the same time, or through the defocus zone 4 of the first lens 1 and the clear zone 3 of the second lens 2 at the same time, thus ensuring clear vision for the wearer at close range while preventing myopia; the second defocus zone 42 is arranged around the clear zone 3 to introduce myopic defocus in the surrounding area.

[0068] like Figure 4 As shown, in a myopia control glasses provided in an embodiment of this application, the clear area 3 includes a third clear area 33 and a plurality of fourth clear areas, and the defocus area 4 includes a plurality of third defocus areas; the myopia control glasses include an array area, in which each third defocus area and each fourth clear area are distributed in a rectangular array along a first direction and a second direction, the array area is adjacent to the third clear area 33, and the array area distribution of the first lens and the second lens is complementary.

[0069] The third clear region 33 can be an upper semicircle, and the array region is a rectangular area adjacent to the third clear region 33. The fourth clear region in the array region is... Figure 4 The location marked "U" is the third out-of-focus area. Figure 4 The location marked "P" in the center, the fourth clear area and the third defocus area in the array area form a checkerboard rectangular array. Figure 4The gaze lines represented by the thicker arrows are the visual lines or light rays simulating the visual lines passing through the fourth clear zone; the gaze lines represented by the thinner arrows are the visual lines or light rays simulating the visual lines passing through the third defocus zone.

[0070] In some embodiments, the array area can also be composed of a semi-circular concentric array of the fourth clear zone and the third defocus zone.

[0071] In a possible implementation, the third defocus zone can be defocus microlenses with a preset positive refractive power; the fourth clear zone can be lenses with a preset negative refractive power. The third defocus zone can include defocus microlenses with a defocus power between +1.0D and +5.0D.

[0072] In some embodiments, the third defocus zone can include but is not limited to rectangular, circular or elliptical defocus microlenses; and the fourth clear zone can include but is not limited to circular, elliptical or approximately triangular or semi-circular optical lenses.

[0073] In an exemplary embodiment, a myopia prevention and control spectacle design method is provided, which uses eye tracking technology to record the eye movement data of the wearer in different visual tasks, such as reading, looking at a computer, and looking at a distance, in real time and accurately according to the eye movement habits, reading posture, and visual line preference of the wearer. The eye movement data can include eye movement trajectories, gaze points, and gaze durations. The distribution of the third clear zone 33 and the entire column area is generated according to the eye movement data, and the myopia prevention and control spectacle is designed according to the distribution.

[0074] In some embodiments, more fourth clear zones can be arranged in the peripheral visual line areas frequently used in the eye movement data, to ensure that these commonly used gaze areas also have good clarity. For example, if the wearer's eye often scans to the end of the text line when reading, the clear area can be increased in the corresponding lens area. According to the non-main gaze areas displayed by the eye tracking data, especially those areas that the eye rarely or briefly scans, the number and density of the third defocus zones are increased. This can ensure that the coverage range and effect of the defocus of the gaze area are maximized without affecting the central clear vision.

[0075] In some embodiments, the size of the defocus power can be personalized according to the progression speed of the wearer's myopia and the eye axis growth. For example, for wearers with faster progression, higher refractive power defocus microlenses can be applied in the peripheral areas they often use.

[0076] In some embodiments, the rectangular array arrangement of the third defocus zone and the fourth clear zone in the array zone can be adjusted according to the usage preference of the first direction and the second direction in the eye movement data, so as to better conform to the actual eye movement trajectory and the visual field utilization mode, for example, adjusting the spacing, size or shape of the array to better wrap around the key defocus area.

[0077] In some embodiments, the lens can integrate a tiny adjustable photoelectric element to sense the eye position in real time through eye tracking and dynamically adjust the refractive power of a specific area, thereby achieving more accurate and real-time clear and defocus switching.

[0078] In the embodiments of the present application, by analyzing a large amount of eye movement data, the unique visual habits of each wearer are identified to achieve, at each fixation point, one eye passing through the defocus lens and the other eye passing through the clear lens, while ensuring the effect of myopia prevention and control and maintaining the visual clarity of the wearer.

[0079] In an exemplary embodiment, a myopia prevention and control glasses is provided, which includes a first lens 1 and a second lens 2 arranged in a first direction, the first lens 1 and the second lens 2 are both provided with a clear zone 3 and a defocus zone 4, the clear zone 3 includes a first clear zone 31 and a second clear zone 32, the first clear zone 31 is arranged at the center of the first lens 1 and the second lens 2, the second clear zone 32 is in communication with the first clear zone 31 and extends a preset length in the first direction or the opposite direction of the first direction, and the defocus zone 4 is arranged around the first clear zone 31 and the second clear zone 32. In the first lens and the second lens, the refractive power of the defocus zone gradually increases or increases in steps from the center of the lens to the edge of the lens.

[0080] The second clear zone 32 in the first lens 1 and the second lens 2 is arranged close to the nasal side of the wearer, which conforms to the nasal fixation preference, or the second clear zone 32 in the first lens 1 and the second lens 2 is arranged close to the temporal side of the wearer as an alternative to the nasal side arrangement to adapt to different eye habits.

[0081] In an exemplary embodiment, a myopia prevention and control spectacle is provided, comprising a first lens 1 and a second lens 2 arranged along a first direction, the first lens 1 and the second lens 2 are both provided with a clear zone 3 and a defocus zone 4, the clear zone 3 is arranged at the center of the first lens 1 and the second lens 2, the defocus zone 4 comprises a plurality of first defocus zones 41, each first defocus zone 41 is arranged with the clear zone 3, and the first defocus zone in the first lens and the first defocus zone in the second lens are complementary in distribution. Each first defocus zone 41 is arranged along the first direction, each first defocus zone 41 in the first lens 1 and each first defocus zone 41 in the second lens 2 are arranged alternately. Each first defocus zone 41 is arranged in the lower half of the clear zone 3 to enhance the lower vision defocus signal when reading at close range. The defocus zone 4 further comprises a second defocus zone 42, the second defocus zone 42 is arranged around the clear zone 3, and the corresponding defocus degree of the second defocus zone can be between +1.0D and +5.0D.

[0082] In an exemplary embodiment, a myopia prevention and control spectacle is provided, comprising a first lens 1 and a second lens 2 arranged along a first direction, the first lens 1 and the second lens 2 are both provided with a clear zone 3 and a defocus zone 4, the clear zone 3 comprises a third clear zone 33 and a plurality of fourth clear zones, and the defocus zone 4 comprises a plurality of third defocus zones; the myopia prevention and control spectacle comprises an array zone, in the array zone, each third defocus zone and each fourth clear zone are arranged in a rectangular array along the first direction and the second direction, the array zone is adjacent to the third clear zone 33, and the array zone of the first lens 1 and the second lens 2 are complementary in distribution. The third defocus zone comprises a defocus microlens with a defocus degree between +1.0D and +5.0D.

[0083] In the embodiments of the present application, the positions and distributions of the clear zone 3 and the defocus zone 4 are such that the visual lines of the wearer's two eyes pass through the clear zone 3 of the first lens 1 and the defocus zone 4 of the second lens 2 at the same position at the same time, or pass through the defocus zone 4 of the first lens 1 and the clear zone 3 of the second lens 2 at the same position at the same time.

[0084] In the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example.

[0085] Each technical feature of the above embodiments can be combined arbitrarily, and in order to make the description simple, each technical feature in the above embodiments is not described in all possible combinations, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present specification.

[0086] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but the present application is not limited to the above embodiments, and therefore cannot be understood as a limitation on the patent application scope. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, various clear regions and defocus regions in the embodiments of the present application can be deformed and improved in shape or arrangement, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A myopia prevention control glasses, characterized in that, The myopia control glasses comprise first and second lenses arranged in a distribution along a first direction; the first and second lenses are respectively provided with a clear zone and a defocus zone, and the distribution positions of the clear zone and the defocus zone are such that the visual lines of the wearer's two eyes pass through the clear zone of the first lens and the defocus zone of the second lens at the same time, or pass through the defocus zone of the first lens and the clear zone of the second lens at the same time, thereby forming binocular differential defocus and avoiding the visual lines of the wearer's two eyes passing through the defocus zone at the same time.

2. The myopia control spectacle lens of claim 1, wherein, The clear zone comprises first and second clear zones, The first clear zone is arranged at the center of the first and second lenses, and the second clear zone is in communication with the first clear zone and extends a preset length in the first direction or the opposite direction of the first direction; The defocus zone is arranged around the first and second clear zones.

3. The myopia control spectacle lens of claim 2, wherein, The second clear zone in each of the first and second lenses is arranged close to the nasal side of the wearer, in line with the nasal side gaze preference of the wearer.

4. The myopia control spectacle lens of claim 2, wherein, The second clear zone in each of the first and second lenses is arranged close to the temporal side of the wearer as an alternative to the nasal side arrangement to accommodate different eye use habits.

5. The myopia control spectacle lens of claim 1, wherein, The clear zone is arranged at the center of the first and second lenses, and the defocus zone comprises a plurality of first defocus zones, each of which is arranged interspersed with the clear zone, and the distribution of the first defocus zones in the first lens is complementary to that in the second lens.

6. The myopia control spectacle lens of claim 5, wherein, Each of the first defocus zones is arranged in the first direction, and each of the first defocus zones in the first lens is arranged interspersed with each of the first defocus zones in the second lens.

7. The myopia control spectacle lens of claim 6, wherein, Each of the first defocus zones is arranged in the lower half of the clear zone to enhance the downward defocus signal when reading at close range.

8. The myopia control spectacle lens of any of claims 5-7, wherein, The defocus zone further comprises a second defocus region, which is arranged around the clear zone, and the corresponding defocus degree of the second defocus region is between +1.0D and +5.0D.

9. The myopia control spectacle lens of claim 1, wherein, The clear zone comprises a third clear zone and a plurality of fourth clear zones, and the defocus zone comprises a plurality of third defocus zones; the myopia control glasses comprise an array zone, in which each of the third defocus zones and each of the fourth clear zones are arranged in a rectangular array in the first and second directions, the array zone is adjacent to the third clear zone, and the distribution of the array zone in the first lens is complementary to that in the second lens.

10. The myopia control spectacle lens of claim 9, wherein, The third defocus zone comprises defocus microlenses with a defocus degree between +1.0D and +5.0D.

11. The myopia control spectacle lens of claim 1, wherein, In the first and second lenses, the refractive power of the defocus zone gradually increases from the center of the lens to the edge of the lens or increases in steps.

12. The myopia control spectacle lens of claim 5, wherein, The first defocus zone is rectangular, trapezoidal or elliptical.

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