Phototherapy system for improving eyesight

Abstract

The invention discloses a phototherapy system for improving vision. The phototherapy system comprises: a light source for emitting illumination light; the light shaper is used for shaping the illumination light emitted by the light source, so that the light forms a light spot with a specific pattern, and the light spot is used for being projected to the eye ground to improve vision; the shaping pattern of the light ray shaper comprises a pattern formed by irregularly arranging single patterns, a pattern formed by arranging the single patterns according to a rule and / or a pattern formed by irregularly arranging various patterns. By means of the scheme, accurate, efficient and safe vision improvement can be achieved for people.

Description

Technical Field

[0001] The present invention relates generally to the field of optical technology. More specifically, the present invention relates to a light therapy system for improving vision. Background Art

[0002] Myopia has become a major public health issue worldwide, with a profound impact on personal health, family life and social development. The occurrence of myopia is caused by the combined effects of congenital genetic factors and acquired environmental factors. Among them, congenital genetic factors are mainly reflected in the regulation of gene on eye development. For example, specific genes may affect the axial length, scleral structure and retinal function, making individuals more susceptible to myopia during physiological development. Acquired environmental factors are closely related to the individual's lifestyle and eye behavior. Long-term close-range eye use will increase the burden of eye adjustment, thereby stimulating the growth of the axial length; and the reduction in outdoor activity time may reduce the chance of the retina releasing dopamine, further accelerating the progression of myopia. Studies have shown that the use of long-wave red light (such as red light near 650nm) to directly irradiate the retina can effectively inhibit the growth of axial length, which has a positive impact on the prevention and control of myopia.

[0003] At present, existing phototherapy equipment still remains at the stage of correcting vision problems through irradiation with light of specific wavelengths. However, the influence of the acquired environment on vision is mainly achieved by changing the image input received by the retina. Different types of image input have a significant impact on the development and adaptive changes of the eyeball. In today's society, people are in a close-range vision state for a long time, such as using electronic screens for a long time, which makes the images received by the retina mostly fine, fixed close-range patterns. This continuous visual stimulation is one of the main mechanisms for the occurrence of myopia. Phototherapy equipment that simply uses light of specific wavelengths cannot achieve targeted improvements to the causes of the above problems, and therefore cannot meet the current society's demand for vision improvement.

[0004] In view of this, there is an urgent need to provide a solution for a light therapy system for improving vision, so as to provide accurate, efficient and safe vision correction for the general public. Summary of the invention

[0005] In order to at least solve one or more of the technical problems mentioned above, the present application proposes solutions of a light therapy system for improving vision in multiple embodiments.

[0006] In a first aspect, the present application provides a phototherapy system for improving vision, comprising: a light source for emitting illumination light; a light shaper for shaping the illumination light emitted by the light source so that the light forms a light spot with a specific pattern, which is used to be projected onto the fundus to improve vision; wherein the shaping pattern of the light shaper comprises: a pattern formed by irregular arrangement of a single graphic, a pattern formed by regular arrangement of a single graphic, and / or a pattern formed by irregular arrangement of multiple graphics.

[0007] In one embodiment, the light shaper includes: a first area and a second area, the first area is composed of the single graphic or the multiple graphics, so that the first area presents the shaping pattern; wherein the light transmittance of the first area is greater than that of the second area, so that the light forms a light spot with a specific pattern after passing through the first area and the second area.

[0008] In another embodiment, the transmittance range of the first region is (0, 100%], and the transmittance range of the second region is [0, 100%].

[0009] In yet another embodiment, the graphics in the single graphic include: a plurality of graphics with different light transmittances and consistent shapes; or, the graphics in the single graphic are graphics with consistent light transmittances and consistent shapes.

[0010] In yet another embodiment, the plurality of graphics include: a plurality of graphics with different light transmittances; or, the plurality of graphics are a plurality of graphics with consistent light transmittances.

[0011] In another embodiment, the pattern formed by the single graphics arranged in a regular pattern includes: a pattern formed by the single graphics arranged along a fixed direction and at a fixed interval, and / or a pattern formed by the single graphics spreading outward from their geometric center and superimposing.

[0012] In yet another embodiment, the fixed direction is a single direction, or the fixed direction includes: a plurality of different directions.

[0013] In yet another embodiment, the multiple different directions are a first direction and a second direction that are perpendicular to each other.

[0014] In another embodiment, the fixed spacing satisfies d1=M×k×S cell , where d1 represents a fixed spacing, S cell represents the size of the visual cell, k represents the unit cell number coefficient, k is a positive integer, and M represents the magnification of the light therapy system projection; and / or, the graphic size of the single graphic satisfies S figure 1=M×l×S cell, where S figure 1 represents the graphic size, l represents the unit cell number coefficient, and l is a positive integer.

[0015] In another embodiment, the pattern formed by the irregular arrangement of the plurality of patterns satisfies at least one of the following conditions: the pattern has at least two adjacent pattern spacings, and the value of any adjacent pattern spacing satisfies d2=M×n×S cell , where d2 represents the distance between adjacent graphics, S cell represents the size of the visual cell, n represents the unit cell number coefficient, n is a positive integer, and M represents the magnification of the light therapy system projection; among the multiple graphics, the value of the size of any graphic satisfies S figure 2=M×q×S cell , where S figure 2 represents the graphic size, q represents the unit cell number coefficient, and q is a positive integer.

[0016] In yet another embodiment, in the light spot having a specific pattern, the specific pattern satisfies at least one of the following conditions: the value range of the spacing between adjacent patterns is (0.002 mm, 0.5 mm); the value range of the pattern size is (0.002 mm, 0.5 mm).

[0017] In yet another embodiment, the graphic includes one or more of the following graphics: a solid circle, a ring, a solid polygon, and a polygonal frame.

[0018] In yet another embodiment, it further includes: a light polarizer; the light polarizer is arranged in the propagation direction of the illumination light, and is used to adjust the polarization direction of the illumination light to form polarized light.

[0019] In yet another embodiment, the light polarizer is placed between the light source and the light shaper; or, the light polarizer is placed on the light exit side of the light shaper.

[0020] In yet another embodiment, the polarized light is one of the following polarized light: circularly polarized light, elliptically polarized light, partially polarized light and linearly polarized light.

[0021] In yet another embodiment, it further comprises: a pattern adjuster; the pattern adjuster is connected to the light shaper and is used to control the light shaper to adjust the shape of the light spot projected onto the fundus within a preset period.

[0022] In yet another embodiment, the pattern adjuster is a driving mechanism for controlling the movement of the light shaper.

[0023] In yet another embodiment, the movement includes: rotation and / or translation.

[0024] In yet another embodiment, the rotation includes: continuous rotation in the same direction and / or positive and negative rotation around a fixed point.

[0025] In yet another embodiment, the translation includes: unidirectional translation and / or bidirectional oscillating movement in any combination.

[0026] In yet another embodiment, it further includes: a light source regulator; the light source regulator is connected to the light source and is used to control the power of the light source so that it emits illumination light with varying brightness within a preset period.

[0027] In another embodiment, the lighting light with changing brightness includes: lighting light with gradually changing brightness, lighting light that alternates between light and dark, and lighting light that alternates between gradually changing brightness; wherein, within a preset period, the brightness of the lighting light with gradually changing brightness gradually changes with time; within the preset period, the brightness change of the lighting light that alternates between light and dark includes a bright stage and a dark stage, when in the bright stage, the brightness of the lighting light that alternates between light and dark is a preset value, and when in the dark stage, the brightness of the lighting light that alternates between light and dark is 0; within the preset period, the brightness change of the lighting light that alternates between gradually changing brightness includes a bright stage and a dark stage, when in the bright stage, the brightness of the lighting light that alternates between light and dark gradually changes with time, and when in the dark stage, the brightness of the lighting light that alternates between light and dark is 0.

[0028] Through the scheme of the light therapy system for improving vision provided above, the embodiment of the present application shapes the light into a light spot with a specific pattern by setting a light shaper for projection to the fundus. Based on this, the embodiment of the present application can adjust the signal processing of the multi-layer neurons of the retina through the visual stimulation of a specific pattern to reduce the tendency of excessive elongation of the eyeball, and can achieve precise stimulation of the retina in space to achieve the effect of improving vision. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0030] Figure 1 is an exemplary schematic diagram showing the basic optical path structure of a single tube in an existing phototherapy device;

[0031] Figure 2 is an exemplary schematic diagram showing the retina of a human eye;

[0032] Figure 3 is an exemplary structural block diagram showing a light therapy system for improving vision according to an embodiment of the present application;

[0033] Figure 4 An exemplary schematic diagram of a light therapy system for improving vision according to an embodiment of the present application is shown.

[0034] Figure 5A is an exemplary schematic diagram showing a pattern formed by arranging single graphics according to a regular pattern according to an embodiment of the present application;

[0035] Figure 5B is an exemplary schematic diagram showing a pattern formed by irregular arrangement of single graphics according to an embodiment of the present application;

[0036] Figure 5C 1 is a diagram showing a pattern formed by irregularly arranging various graphics according to an embodiment of the present application;

[0037] Figure 6 is an exemplary schematic diagram showing a light polarizer according to an embodiment of the present application;

[0038] Figure 7 is an exemplary schematic diagram showing the rotation and translation of a light shaper according to an embodiment of the present application;

[0039] Figure 8 is an exemplary schematic diagram showing illumination light with varying brightness according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0041] It should be understood that the terms "include" and "comprising" used in the specification and claims of the present application indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0042] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this application specification and claims, unless the context clearly indicates otherwise, the singular forms of "a", "an" and "the" are intended to include plural forms. It should also be further understood that the term "and / or" used in this application specification and claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0043] As used in this specification and claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0044] As described in the above background technology, the occurrence of myopia is caused by the combined effects of congenital genetic factors and acquired environmental factors. Specific genes in congenital genetic factors may affect the length of the eye axis, scleral structure and retinal function, making individuals more susceptible to myopia during physiological development. However, the effect of myopia-related genes is usually significantly regulated by acquired environmental factors. In modern society, long-term close-range eye use (such as reading books, using electronic devices, etc.) and lack of outdoor activities are the main causes of the high incidence of myopia. Studies have shown that long-term close-range eye use will increase the burden of eyeball adjustment, thereby stimulating the growth of the eye axis; and the reduction of outdoor activity time may reduce the chance of retinal dopamine release, further accelerating the progression of myopia. In addition, bad eye habits (such as reading too close, insufficient light) can also increase the risk of myopia. Among them, eye axis growth is one of the main factors causing myopia in the human eye.

[0045] As mentioned above, there are many phototherapy devices (which use long-wave red light around 650nm) that use a binocular structure, each corresponding to one eye, and the distance between the binoculars can be adjusted through a mechanical structure to adapt to the human eye so that the red light images seen by both eyes overlap. Among them, the basic optical path structure of each monocular is as follows: Figure 1 shown.

[0046] Figure 1 FIG. 1 is an exemplary schematic diagram showing the basic optical path structure of a single tube in an existing phototherapy device. Figure 1 As shown in , the basic optical path structure of the monocular may include at least a light source 101 and a light-transmitting element 102. The light-transmitting element may be a transparent protective window plate or a light-transmitting lens to further converge or diverge the light beam emitted by the light source. In the implementation scenario, red wavelength light is emitted from the light source 101, passes through the light-transmitting element 102, enters the human eye 103, and irradiates the retina to correct vision.

[0047] However, the impact of the acquired environment on myopia is mainly achieved by changing the image input received by the retina. The retina is the core part of visual signal transmission, and different types of image input (such as optical defocus, contrast) have a significant impact on the development and adaptive changes of the eyeball. It is understandable that changes in modern lifestyles (such as the use of electronic screens) have caused people to be in a close-up vision state for a long time, so that the images received by the retina are mostly fine, fixed, close-up patterns. This continuous visual stimulation will trigger adaptive changes in retinal cells, further causing excessive elongation of the anterior-posterior axis of the eyeball. Therefore, phototherapy equipment that only uses light of a specific wavelength cannot achieve targeted improvements to the causes of the above problems, and therefore cannot meet the current social needs for vision improvement.

[0048] On the contrary, certain specially designed image inputs can play a role in inhibiting the progression of myopia. For example, the prevention and control lenses with defocus design effectively slow down the excessive growth trend of the eye axis by adjusting the optical imaging mode on the retina. This shows that by controlling the type of image received by the retina, the occurrence and development of myopia can be controlled to a certain extent. The anatomical structure and functional characteristics of the retina further confirm the impact of image input on the development of myopia. Specifically, the retina is composed of multiple layers of neurons, including photoreceptor cells (such as rods and cones), bipolar cells, ganglion cells, etc. Each layer of cells plays an important role in the reception and processing of visual signals. When the retina receives visual stimulation of close-up and fine patterns for a long time, the signal processing of its various layers of cells will undergo adaptive adjustments, which will affect the morphology of the eyeball. For example, excessive excitement of photoreceptor cells may trigger changes in the signal pathway between the retina and the sclera through the release of neurotransmitters, ultimately leading to the extension of the eye axis.

[0049] Figure 2 is an exemplary schematic diagram showing the retina of a human eye. Figure 2 The middle left picture shows the division of different tissue regions of the human eye retina, including, for example, the macula, fovea, parafovea, perifovea, fovealavascular zone (FAZ), foveola, and umbo. Different tissue cells are distributed in different tissue regions, such as Figure 2The middle right figure shows the distribution of tissue cells in the FAZ, fovea, and tympanic convexity. Each tissue cell is equivalent to a photoelectric receiver, so each cell receives energy and contrast from the light. As can be seen from the figure, the tissue cells in the retina of the human eye are closely arranged, each tissue cell is irregularly round, and tissue cells do not receive information from each other, so that the human eye can make judgments about the edges of objects to identify the resolution of objects. Therefore, by shaping the light source at the conjugate position of the fundus (that is, the exit pupil position of the focusing lens), the shaped light is projected onto the retina, so that the retina can receive other information besides energy, such as light resolution, color information, etc., which can inhibit or delay the elongation of the eye axis, thereby achieving the effect of improving vision.

[0050] Based on this, the present application provides a light therapy system for improving vision, which uses a light shaper to shape light into a light spot with a specific pattern to irradiate the fundus. Thus, the signal input of the retina can be adjusted through a specific pattern to reduce the tendency of excessive elongation of the eyeball, so as to achieve the effect of improving vision.

[0051] The specific implementation of the present application is described in detail below with reference to the accompanying drawings.

[0052] Figure 3 FIG. 3 is an exemplary structural block diagram showing a light therapy system 300 for improving vision according to an embodiment of the present application. Figure 3 As shown in , the phototherapy system 300 includes: a light source 301 for emitting illumination light; and a light shaper 302 for shaping the illumination light emitted by the light source so that the light forms a light spot with a specific pattern, which is used to project to the fundus to improve vision. The shaping pattern of the light shaper includes: a pattern formed by a single pattern arranged irregularly, a pattern formed by a single pattern arranged according to a regular pattern, and / or a pattern formed by a plurality of patterns arranged irregularly.

[0053] In some embodiments, the aforementioned light source 301 can be any type of light source, and the color of the light source can be arbitrary. For example, it can be one or more of long-wave red light near 650nm, purple light near 380nm, blue light near 450nm, and green light near 510nm. The present application does not impose any restrictions in this regard. The illumination light can be light for phototherapy illumination. Phototherapy illumination is a technology that uses light in a specific wavelength range to produce a therapeutic or regulatory effect on an organism. Its principle is based on the effect of light on an organism, including visual effects, non-visual effects, and chemical effects, among which the visual effect is mainly through the photoreceptor cells on the retina receiving light information.

[0054] In some embodiments, the aforementioned light shaper 302 may be, for example, a shaping plate such as a light homogenizer, a diffuser, or a diffractive optical element plate ("DOE"). In some embodiments, the shaping plate may be made of a variety of materials including acrylic, PET, PC, and glass materials. In other embodiments, a shaping pattern is processed on the shaping plate by a variety of processes including laser typesetting, laser etching, nanoimprinting, metal stripping, etc., so as to shape the light emitted by the light source so that the light forms a light spot with a specific pattern. The present application does not impose any restrictions in this regard. It can be understood that the shaping pattern in the embodiment of the present application is artificially designed in industrial design, and the specific pattern (i.e., the light spot pattern) is related to the shaping pattern of the light shaper and the magnification of the optical system.

[0055] In some implementation scenarios, the light shaper 302 is set at a conjugate position of the fundus (i.e., the exit pupil position of the focusing lens). After passing through the light shaper, a light spot with a specific pattern can be generated at the fundus, so that the human eye can perceive energy, color, and resolution to inhibit or delay the elongation of the eye axis.

[0056] In some embodiments, the light shaper includes: a first area and a second area, and the first area is composed of a single graphic or multiple graphics, so that the first area presents a shaping pattern. The light transmittance of the first area is greater than that of the second area, so that the light forms a light spot with a specific pattern after passing through the first area and the second area. It can be understood that the aforementioned first area is a light-transmitting area on the light shaper, and the cells corresponding to the formed shaping pattern can be activated by light stimulation, and the light transmittance of the first area is greater than that of the second area. Therefore, the first area can allow more light to pass through, and the brightness of the position corresponding to the first area on the light spot is higher than that of the position corresponding to the second area, so that the light forms a light spot with a specific pattern after passing through the first and second areas. Specifically, the first area allows more light to pass through, thereby forming a pattern area with higher brightness on the light spot, while the second area allows less light to pass through, forming a background area with lower brightness. This design can achieve precise stimulation of the retina to achieve the effect of improving vision.

[0057] In some embodiments, the transmittance range of the first area is (0, 100%], and the transmittance range of the second area is [0, 100%). That is, the first area can be completely transparent or partially transparent. The second area can be a completely opaque area or a weakly transparent area on the light shaper. It should be noted that the partial transmittance of the first area indicates a certain weakening effect on the light energy. The cells corresponding to the completely opaque area of ​​the second area are not stimulated and activated, and the light stimulation to the cells corresponding to the weakly transparent area of ​​the second area is weakened. In other words, the second area can block all light passing through it, and the transmittance is 0 at this time, or it can weaken the light energy, and the transmittance is greater than 0 and less than 100%. Based on this design, it is allowed to adjust the transmittance of the first area and the second area to achieve precise control of the spot pattern, so that according to the distribution of photoreceptor cells on the retina, it is possible to selectively activate cells in the target area, not activate cells in some areas, or weaken the stimulation of cells in some areas.

[0058] In some embodiments, the image in the single graphic in the first area includes a plurality of graphics with different transmittances and the same shape. Alternatively, the graphics in the single graphic are graphics with the same transmittance and the same shape. The plurality of graphics include a plurality of graphics with different transmittances. Alternatively, the plurality of graphics are a plurality of graphics with the same transmittance. That is, the transmittance of some points in the light shaper may be consistent, while the transmittance of other points may be inconsistent. This setting of inconsistent transmittance can visually generate a resolution awareness of black and white intervals, inducing a visual change trend.

[0059] As an example, for example, for a multi-ring pattern, the transmittance on the light shaper may be, for example, a gradual change in the radial direction from the center to the surroundings, so as to form a light spot of a specific pattern with a gradual brightness change. For example, for a dot pattern, the transmittance on the light shaper may also be, for example, a gradual change in the horizontal, vertical, or positive and negative 45° directions. The aforementioned gradual changes include gradual increase and gradual decrease.

[0060] According to the foregoing, the aforementioned shaping pattern may include a single irregular pattern, a single regular pattern, and / or a pattern in which multiple patterns are arranged irregularly. In some embodiments, the pattern formed by a single pattern arranged in a regular manner may include a pattern formed by a single pattern arranged along a fixed direction and at a fixed spacing and / or a single pattern diffused outward from its geometric center and superimposed to form a pattern. In some embodiments, the aforementioned graphics may include but are not limited to one or more of the following graphics: a solid circle, a ring, a solid polygon (e.g., a hexagon), and a polygonal frame (e.g., a hexagonal frame). In some implementation scenarios, for example, the diffusion of a ring-shaped graphic, the ring width may remain unchanged or increase.

[0061] In some embodiments, the aforementioned fixed direction may be a single direction, or the fixed direction may further include multiple different directions. The aforementioned single direction may be, for example, any direction in the horizontal, vertical, diagonal or circular direction, and the multiple different directions are a first direction and a second direction perpendicular to each other. Taking a pattern such as a dot matrix or a square matrix as an example, the aforementioned first and second directions perpendicular to each other may correspond to the horizontal or vertical direction of the dot matrix or the square matrix. Alternatively, the first and second directions may correspond to the vertical or horizontal direction of the dot matrix or the square matrix.

[0062] In some embodiments, the value of the aforementioned fixed spacing satisfies d1=M×k×S cell , where d1 represents a fixed spacing, S cell represents the size of the visual cell, k represents the unit cell number coefficient, and k is a positive integer, and M represents the magnification of the light therapy system projection. And / or, the graphic size of a single graphic satisfies S figure 1=M×l×S cell , where S figure 1 represents the size of the pattern, l represents the unit cell number coefficient, and l is a positive integer. It should be understood that the aforementioned unit cell number coefficient refers to the number of visual cells that can be covered by the pattern as a light-transmitting unit of the illumination light during pattern design. The unit cell number coefficients of the pattern size and spacing are set independently. For example, a light-transmitting dot can be designed to cover 3 visual cells, and the spacing between two light-transmitting dots can be 5 visual cells apart.

[0063] The photoreceptors include cones and rods, which are responsible for converting light signals into nerve signals, which are then transmitted to the brain for visual information processing. The length of the rod is 0.04mm-0.06mm, and its diameter is 0.002mm. The length of the cone is 0.028mm-0.058mm, and its diameter is 0.0025-0.0075mm. Due to the different types and sizes of photoreceptors in the physiological structure of the eye, in some embodiments, the minimum size of the photoreceptor can be used so that the illumination accuracy can meet the size accuracy of the smallest photoreceptor.

[0064] The embodiments of the present application design the graphic size and spacing according to the size of the photoreceptors, thereby improving the lighting accuracy of a single light-transmitting unit in the phototherapy system to the photoreceptor size level. Combined with the magnification of the projection of the phototherapy system, it can ensure that the lighting accuracy of the light spot of a specific pattern formed after the projection of the phototherapy system can also reach the photoreceptor size level, thereby enhancing the use effect of the phototherapy system by improving the lighting accuracy.

[0065] In some embodiments, a pattern formed by irregularly arranging multiple patterns satisfies at least one of the following conditions: the pattern has at least two adjacent pattern spacings, and the value of any adjacent pattern spacing satisfies d2=M×n×S cell , where d2 represents the distance between adjacent graphics, S cell represents the size of the visual cell, n represents the coefficient of the number of unit cells, and n is a positive integer, and M represents the magnification of the projection of the phototherapy system. Among the various graphics, the value of the size of any graphic satisfies S figure 2=M×q×S cell , where S figure 2 represents the pattern size, q represents the unit cell number coefficient, and q is a positive integer. Similar to the pattern formed by the above-mentioned single pattern arranged according to a regular pattern, the pattern size and spacing design of the pattern formed by the irregular arrangement of multiple patterns (random pattern) are also independent of the regular pattern.

[0066] In other embodiments, in a light spot with a specific pattern, the specific pattern satisfies at least one of the following conditions: the value range of the spacing between adjacent patterns is (0.002mm, 0.5mm). The value range of the pattern size is (0.002mm, 0.5mm). This is because the long-term exposure of the retina to visual stimulation of close-range and fine patterns has a direct impact on the occurrence and progression of myopia. Too high or too low contrast will stimulate the growth of the eyeball, and the specifically designed prevention and control pattern can delay the trend of excessive elongation of the eyeball by adjusting the signal input of the retina. The embodiment of the present application realizes a specific light spot pattern by designing a light shaper, and realizes precise stimulation of the retina in space to achieve the effect of improving vision.

[0067] It should be understood that the 0.002mm in the specific pattern represents the size of the smallest cell on the retinal cells, which is also the minimum size of a single light spot irradiated on the retina, and the minimum spacing between two smallest cells is 0.002mm. 0.5mm means that the maximum spot size projected on the retina is 0.5mm, and the spacing is 0.5mm. It should be noted that the above range of values ​​for the spacing between adjacent graphics and the range of values ​​for the graphics size are calculated based on the coverage range of 1-66 smallest cells.

[0068] In combination with the above description, it can be seen that the embodiment of the present application is to set a light shaper, and the light shaper includes a single pattern arranged irregularly, a single pattern arranged according to a rule, and / or a plurality of patterns arranged irregularly to form a shaping pattern, so as to shape the light into a light spot of a specific pattern. Through the visual stimulation of the light spot of the specific pattern, the signal processing of the multi-layer neurons of the retina can be adjusted, so that the retina can receive other information besides energy, so as to reduce the excessive elongation of the eyeball, thereby effectively improving vision. The embodiment of the present application is not limited to the center of the retina, but also pays special attention to the optical signal input of the peripheral area of ​​the retina, expands the illumination range, and significantly optimizes the dose-effect relationship of improving vision. In addition, the embodiment of the present application not only improves the accuracy of retinal stimulation in space, but also significantly shortens the onset time by actively projecting a light spot of a specific pattern with high signal intensity to the retina.

[0069] Figure 4 An exemplary schematic diagram of a light therapy system for improving vision according to an embodiment of the present application is shown. Figure 4 As shown in , the phototherapy system may include a light source 301 and a light shaper 302. In addition, it may also include a projection system consisting of an illumination lens 401 and a projection lens 402. As can be seen from the foregoing, the light source 301 is used to emit illumination light; the light shaper 302 is used to shape the illumination light emitted by the light source so that the light forms a light spot with a specific pattern. Furthermore, the illumination lens 401 may be disposed on the light source exit side of the light source 301 to collect the light emitted by the light source 301 and shaped by the light shaper 302, and project the light to the projection lens 402. The projection lens 402 projects the light emitted by the illumination lens 401 to the human eye 103, so that the light forms a light spot with a specific pattern and is projected to the human eye. Among them, for more details about the light shaper 302, please refer to the above. Figure 3 The description made will not be repeated in this application.

[0070] Figure 5A is an exemplary schematic diagram showing a pattern formed by arranging single graphics according to a regular pattern according to an embodiment of the present application. Figure 5AFigure (a) in the figure exemplifies a pattern formed by a single graphic being a circular ring, which diffuses outward from its geometric center and is superimposed; Figure (b) exemplifies a pattern formed by a single graphic being a semicircular ring. Figure (c) exemplifies a pattern formed by a single graphic being a solid circle, which is regularly arranged in the horizontal and vertical directions and at a certain interval; Figure (d) exemplifies a dot ring pattern formed by a single graphic being a solid circle, which diffuses outward from the geometric center and is superimposed. Figure (e) exemplifies a pattern formed by a single graphic being a square, which is regularly arranged in the horizontal and vertical directions; Figure (f) exemplifies a square ring pattern formed by a single graphic being a square, which diffuses outward from the geometric center and is superimposed. Figure (g) exemplifies a pattern formed by a single graphic being a circular ring, which diffuses outward from its geometric center and is superimposed. Figure (h) exemplifies a pattern formed by a single graphic being a square ring, which diffuses outward from its geometric center and is superimposed. Figure (i) exemplifies a pattern formed by a single graphic being a hexagon, which is regularly arranged at a certain interval. Figure (j) exemplarily shows a single graphic as a hexagonal frame, which spreads outward from its geometric center and forms a superimposed pattern.

[0071] Furthermore, patterns arranged according to different rules can be combined to form new patterns. For example, the patterns in (a) and (b) can be combined to form a pattern that is a semicircular ring as a whole, and the interior of the semicircular ring is a ring-shaped pattern. As can be seen from the previous text, it can be arranged according to a fixed spacing d1 = M × k × S cell Arrange them regularly. The size of a single figure can satisfy S figure 1=M×l×S cell .

[0072] Figure 5B is an exemplary schematic diagram showing a pattern formed by irregular arrangement of single graphics according to an embodiment of the present application. Figure 5B The pattern shown in FIG. 1 is formed by using a single graphic, a circle, and randomly distributing the circles.

[0073] Figure 5C 2 is a diagram showing a pattern formed by irregularly arranging various patterns according to an embodiment of the present application. Figure 5C The pattern shown in FIG. 1 is formed by using multiple polygons and arranging them irregularly. In some embodiments, for a shape such as Figure 5B and Figure 5C The value of the spacing between any two adjacent patterns can satisfy d2 = M × n × S cell , any value of the graphic size can satisfy S figure 2=M×q×S cell .

[0074] It should be understood that the aforementioned Figure 5A-5CThe patterns are exemplary and non-limiting. In some embodiments, a sight mark may be added to the above-mentioned shaping pattern to make the human eye fixate and guide the human eye to illuminate a specific area. The sight mark may be in the shape of a circle, a square or a cross, as described above. Figure 5A As shown in (a) and (b).

[0075] In some embodiments, the phototherapy system of the embodiment of the present application may further include: a light polarizer. The light polarizer is arranged in the propagation direction of the illumination light, and is used to adjust the polarization direction of the illumination light to form polarized light. In some embodiments, the light polarizer is placed between the light source and the light shaper; or, the light polarizer is placed on the light output side of the light shaper. In some embodiments, the polarized light is one of the following polarized lights: circularly polarized light, elliptically polarized light, partially polarized light, and linearly polarized light. This is because some cells in the retina have a specific response to the polarization state of light, and thus the embodiment of the present application adjusts the polarization characteristics of the light through a light polarizer. This can further optimize the propagation characteristics of light on the retina, enhance the biological effects of optical signals, more effectively stimulate target cells, and optimize the vision improvement effect.

[0076] Figure 6 is an exemplary schematic diagram showing a light polarizer according to an embodiment of the present application. Figure 6 As shown in FIG. 6( a ), the light polarizer 601 may be disposed between the light source 301 and the light shaper 302 ; or, Figure 6 As shown in FIG. (b), the light polarizer 601 can be disposed on the light exit side of the light shaper, that is, the rear surface of the projection lens 402. Based on the disposed light polarizer, the light entering the human eye 103 is polarized, that is, the light perceived by the human eye is polarized light. In some embodiments, the polarization direction entering the human eye can be one of horizontal, vertical, 45° direction, and -45° direction.

[0077] It should be noted that, in some embodiments, Figure 6 The light polarizer shown can be used in combination with the light shaper 302 to polarize the light with changed brightness distribution or to shape the polarized light. Figure 6 The light polarizer shown can also be used alone, for example, to project uniformly distributed polarized light onto the fundus.

[0078] In some embodiments, the phototherapy system of the embodiment of the present application may further include: a pattern adjuster; the pattern adjuster is connected to the light shaper, and is used to control the light shaper to adjust the shape of the light spot projected to the fundus within a preset period. In some embodiments, the pattern adjuster is a driving mechanism for controlling the movement of the light shaper. In other embodiments, the aforementioned movement includes: rotation and / or translation. Based on the set pattern adjuster, the position of the light spot pattern projected to the fundus at different times can be changed by controlling the movement of the light shaper, thereby disrupting the fixed visual stimulation in the time dimension characteristics, so that the retina produces more signals to stop the growth of the eyeball.

[0079] In some embodiments, the aforementioned rotation may include: continuous rotation in the same direction and / or positive and negative rotation around a fixed point. Positive and negative rotation refers to a rotational motion that alternates between clockwise rotation and counterclockwise rotation, and the rotation angle and rotation speed of each clockwise rotation and each counterclockwise rotation may be the same or different.

[0080] In some other embodiments, the aforementioned translation includes: unidirectional translation and / or oscillating movement. For example, the pattern adjuster can control the light shaper to move unidirectionally from left to right, and the pattern adjuster can also control the light shaper to move back and forth in the horizontal direction, in the vertical direction, or in both the horizontal and vertical directions.

[0081] Figure 7 FIG. 1 is an exemplary schematic diagram showing the rotation and translation of a light shaper according to an embodiment of the present application. Figure 7 As shown in , schematic diagrams of continuous rotation, positive and negative rotation, and vibration of the light shaper are shown from left to right.

[0082] It should be understood that when the eyes observe a rotating object, multiple visual systems and neural mechanisms are involved. Specifically, it involves: eye movement system: the eyeball smoothly follows the movement trajectory of the rotating object; saccadic movement: when the object rotates rapidly, the eyeball may need to move quickly in a jumping manner to recapture the target; retina: photoreceptor cells (cones and rods) capture the light information of the rotating object. The embodiment of the present application adopts a pattern regulator to make the light entering the human eye into a pattern of rotation and / or translation, and the changing pattern can induce the retina and neural system to provide eye training capabilities.

[0083] Apart from Figure 7In addition to the method of driving the light shaper shown, there are other ways to adjust the shape of the light spot projected to the fundus within a preset period. In some embodiments, a roulette switch can be used to change the light shaper located on the optical axis. For example, the light shaper can be a light shaping plate, and a plurality of light shaping plates with different patterns are circumferentially arranged on the roulette switch. The roulette switch can change the light shaping plate located on the optical axis of the phototherapy system by rotation. Within a preset period, light can pass through light shaping plates with different patterns to form light spots with different patterns and be projected to the fundus. In other embodiments, the light shaper can use a device that can change its own light transmittance, such as an electrically controlled dimming glass. Compared to Figure 7 The above two methods have the disadvantages of occupying large space and high cost. Therefore, it can be preferred in practical application. Figure 7 The change of the light spot shape is achieved by the method shown.

[0084] In some embodiments, the light therapy system of the embodiment of the present application may further include: a light source regulator. The light source regulator is connected to the light source and is used to control the power of the light source so that it emits illumination light with varying brightness within a preset period.

[0085] In some embodiments, the illumination light with brightness variation may include illumination light with brightness gradient variation, illumination light that alternates between bright and dark, and illumination light that alternates between gradient variation. Wherein, within a preset period, the brightness of the illumination light with brightness gradient variation changes gradually with time. Within a preset period, the brightness variation of the illumination light that alternates between bright and dark variation includes a bright stage and a dark stage. When in the bright stage, the brightness of the illumination light that alternates between bright and dark variation is a preset value. When in the dark stage, the brightness of the illumination light that alternates between bright and dark variation is 0. Within a preset period, the brightness variation of the illumination light that alternates between gradient variation includes a bright stage and a dark stage. When in the bright stage, the brightness of the illumination light that alternates between gradient variation changes gradually with time. When in the dark stage, the brightness of the illumination light that alternates between gradient variation is 0.

[0086] Figure 8 is an exemplary schematic diagram showing the illumination light with brightness variation according to an embodiment of the present application. Figure 8 , from left to right, illuminating light with gradually changing brightness, illuminating light with alternating brightness, illuminating light with alternating brightness, and illuminating light emitted continuously are exemplarily shown. Among them, the illuminating light emitted continuously is the illuminating light generated without using a light source regulator.

[0087] It can be understood that the pattern regulator changes the light spot shape by moving the light shaper, while the light source regulator changes the light spot shape by changing the brightness of the illumination light. In other words, the light source regulator disrupts the fixed visual stimulus in the time dimension by changing the intensity of the light spot pattern projected to the fundus. Both can adjust the signal input of the retina, interfere with the retina sending growth signals to the eyeball, and make the retina produce more signals to stop the growth of the eyeball, thereby improving the vision improvement effect.

[0088] Based on the foregoing description, it can be seen that the embodiments of the present application avoid being limited to the use of lasers and limited to irradiation of the fovea for myopia prevention and control, but instead shape the light into a patterned light spot by setting a light shaper and projecting it onto the retina of the human eye. This is different from defocused lenses and low-contrast lenses that can only passively change the natural light from the outside world. The embodiments of the present application actively project a specific pattern with high signal intensity to the retina, adjust the signal processing of the multi-layer neurons of the retina, and reduce excessive elongation of the eyeball, thereby effectively improving vision. This not only improves the accuracy of retinal stimulation, but also significantly shortens the onset time.

[0089] Furthermore, the embodiment of the present application sets a light polarizer to adjust the polarization characteristics of the light based on the fact that some cells in the retina have a specific response to the polarization state of light, so as to further optimize the vision improvement effect. Furthermore, the embodiment of the present application also takes into account that the pattern projected onto the retina continues to change in the time dimension, which will interfere with the retina sending a growth signal to the eyeball. Based on this, the embodiment of the present application also controls the movement of the light shaper through a pattern regulator to change the intensity, position (such as translation, rotation) and other characteristics of the projected pattern; and / or realizes the transformation of the spot shape through a light source regulator to disrupt the fixed visual stimulation in the time dimension characteristics, so that the retina produces more signals to stop the growth of the eyeball, and further improves the vision improvement effect.

[0090] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0091] It should be noted that although the operations of the method of the present application are described in a specific order in the accompanying drawings, this does not require or imply that the operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. On the contrary, the steps depicted in the flow chart can be performed in a different order. Additionally or alternatively, some steps can be omitted, multiple steps can be combined into one step, and / or one step can be decomposed into multiple steps.

[0092] It should be understood that when the terms "first", "second", "third" and "fourth" are used in the claims, the specification and the drawings of the present application, they are only used to distinguish different objects, rather than to describe a specific order. The terms "include" and "comprise" used in the specification and claims of the present application indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0093] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in this application specification and claims, unless the context clearly indicates otherwise, the singular forms of "a", "an" and "the" are intended to include plural forms. It should also be further understood that the term "and / or" used in this application specification and claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0094] Although the implementation methods of the present application are as above, the contents described are only examples adopted to facilitate the understanding of the present application, and are not intended to limit the scope and application scenarios of the present application. Any technician in the technical field described in the present application can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present application, but the scope of patent protection of the present application shall still be subject to the scope defined in the attached claims.

Claims

1. A light therapy system for improving vision, characterized in that: include: A light source for emitting illumination light; A light shaper, which is used to shape the illumination light emitted by the light source so that the light forms a light spot with a specific pattern, and the light spot is used to be projected onto the fundus to improve vision; The shaping pattern of the light shaper includes: a pattern formed by irregularly arranging a single pattern, a pattern formed by regularly arranging a single pattern, and / or a pattern formed by irregularly arranging multiple patterns.

2. The light therapy system according to claim 1, characterized in that The light shaper comprises: a first area and a second area, the first area being composed of the single graphic or the multiple graphics, so that the first area presents the shaping pattern; The light transmittance of the first region is greater than that of the second region, so that the light forms a light spot with a specific pattern after passing through the first region and the second region.

3. The light therapy system according to claim 2, characterized in that The transmittance range of the first region is (0, 100%], and the transmittance range of the second region is [0, 100%].

4. The phototherapy system according to any one of claims 1 to 3, characterized in that: The graphics in the single graphic include: a plurality of graphics with different light transmittances and consistent shapes; or, The graphics in the single graphic are graphics with consistent light transmittance and shape.

5. The light therapy system according to any one of claims 1 to 4, characterized in that: The multiple graphics include: a plurality of graphics with different light transmittances; or, The multiple graphics are several graphics with consistent light transmittance.

6. The light therapy system according to any one of claims 1 to 5, characterized in that: The patterns formed by arranging the single graphics according to a regular pattern include: A pattern formed by arranging a single figure along a fixed direction and at a fixed spacing. and / or, A pattern formed by a single shape spreading outward from its geometric center and superimposing it.

7. The light therapy system according to claim 6, characterized in that The fixed direction is a single direction, or the fixed direction includes: a plurality of different directions.

8. The light therapy system according to claim 7, characterized in that The multiple different directions are a first direction and a second direction that are perpendicular to each other.

9. The light therapy system according to claim 6, characterized in that: The fixed spacing satisfies the value of d1=M×k×S cell , where d1 represents a fixed spacing, S cell represents the size of the photoreceptor, k represents the coefficient of the number of unit cells, k is a positive integer, and M represents the magnification of the projection of the phototherapy system; and / or, The graphic size of the single graphic satisfies S figure 1=M×l×S cell , where S figure 1 represents the graphic size, l represents the unit cell number coefficient, and l is a positive integer.

10. The light therapy system according to any one of claims 1 to 8, characterized in that: The pattern formed by the irregular arrangement of the multiple graphics satisfies at least one of the following conditions: The pattern has at least two adjacent pattern spacings, and the value of any adjacent pattern spacing satisfies d2 = M × n × S cell , where d2 represents the distance between adjacent graphics, S cell represents the size of the visual cell, n represents the coefficient of the number of unit cells, n is a positive integer, and M represents the magnification of the projection of the phototherapy system; Among the multiple graphics, the value of the size of any graphic satisfies S figure 2=M×q×S cell , where S figure 2 represents the graphic size, q represents the unit cell number coefficient, and q is a positive integer.

11. The light therapy system according to any one of claims 1 to 8, characterized in that: In the light spot having a specific pattern, the specific pattern satisfies at least one of the following conditions: The value range of the spacing between adjacent graphics is (0.002mm, 0.5mm); The value range of the graphic size is (0.002mm, 0.5mm).

12. The light therapy system according to any one of claims 1 to 11, characterized in that: The graphics include one or more of the following graphics: a solid circle, a ring, a solid polygon and a polygonal frame.

13. The light therapy system according to any one of claims 1 to 12, characterized in that: Also includes: Light polarizer; The light polarizer is arranged in the propagation direction of the illumination light and is used to adjust the polarization direction of the illumination light to form polarized light.

14. The light therapy system according to claim 13, characterized in that The light polarizer is placed between the light source and the light shaper; or, The light polarizer is placed on the light exit side of the light shaper.

15. The light therapy system according to claim 13, characterized in that The polarized light is one of the following polarized light: circularly polarized light, elliptically polarized light, partially polarized light and linearly polarized light.

16. The light therapy system according to any one of claims 1 to 15, characterized in that: Also includes: Pattern adjuster; The pattern adjuster is connected to the light shaper and is used to control the light shaper to adjust the shape of the light spot projected onto the fundus within a preset period.

17. The light therapy system according to claim 16, characterized in that The pattern adjuster is a driving mechanism for controlling the light shaper to move.

18. The light therapy system according to claim 17, characterized in that The movement includes: rotation and / or translation.

19. The light therapy system according to claim 18, characterized in that The rotation includes: continuous rotation in the same direction and / or positive and negative rotation around a fixed point.

20. The light therapy system according to claim 18, characterized in that The translation includes: unidirectional translation and / or oscillating movement.

21. The light therapy system according to any one of claims 1 to 20, characterized in that: Also includes: Light source regulator; The light source regulator is connected to the light source and is used to control the power of the light source so that it emits illumination light with varying brightness within a preset period.

22. The light therapy system according to claim 21, characterized in that The illumination light with brightness variation includes: illumination light with gradually varying brightness, illumination light with alternating brightness and illumination light with alternating brightness; wherein, In a preset period, the brightness of the illumination light with gradually changing brightness changes gradually over time; In the preset cycle, the brightness change of the alternating light-dark lighting light includes a bright stage and a dark stage. When in the bright stage, the brightness of the alternating light-dark lighting light is a preset value, and when in the dark stage, the brightness of the alternating light-dark lighting light is 0; Within the preset period, the brightness change of the gradually alternating lighting light includes a bright stage and a dark stage. In the bright stage, the brightness of the gradually alternating lighting light gradually changes over time. In the dark stage, the brightness of the gradually alternating lighting light is 0.

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