Lens for controlling diopter and relieving cervical vertebra strain based on eye muscle balance theory

Abstract

The utility model discloses a lens for controlling diopter and relieving cervical vertebra strain based on the eye muscle balance theory, the surface of the lens is composed of a far vision area, a middle vision area and a near vision area which are variable in proportion, and a lens base is a prism with a variable base angle. According to the scheme, by means of the well-designed partitioning function and the position angle of the partitioning lens, far, middle and short-distance images can fall on the retina macular fovea center, fatigue, tension and spasm of eye muscles are effectively avoided, eye muscle coordination is improved, excessive adjustment, convergence and excessive sclera pulling through long-time short-distance eye using are avoided, and therefore the effect of improving the eye quality is achieved. The head of a student can be raised to a higher position when the student looks far, the eyeballs are turned upwards and outwards, hurt to the cervical vertebra of the student when the student lowers the head for a long time is further improved, neck soreness and stiffness and tension of muscles of the cervical vertebra and the shoulder are avoided, and the probability of humpback is reduced.

Description

Technical Field

[0001] The utility model relates to the field of lenses, in particular to a lens which can control diopter and relieve cervical strain based on eye muscle balance theory. Background Art

[0002] Various related organizations have spent a lot of effort trying to curb the high rate of myopia among young people, but the effect is still not good. The poor myopia prevention and control of current products on the market is not only due to the design ideas of the products themselves, but also related to the fact that the basic theories of the products cannot keep pace with the times. Therefore, strengthening the research on the cause of myopia, innovating myopia prevention and control methods, and creating new myopia prevention and control products have become the top priority of myopia prevention and control among young people. Regarding the mechanism of the occurrence and development of acquired myopia in adolescent students, many experts have gradually reached the following relatively general consensus: the eye muscle balance theory.

[0003] The eye muscle balance theory refers to the visual triad of the intraocular muscles and extraocular muscles in order to see the image of the object clearly, which includes adjustment, convergence and pupil constriction. When the eyeball converges under the action of the extraocular muscles in order to see the image of a nearby object clearly, the intraocular muscles will further adjust in order to see the image clearly. If this behavior lasts too long, it will inevitably lead to continuous fatigue, tension and spasm of the intraocular muscles, resulting in different time and intensity of force application of the intraocular muscles, thus causing imbalance of eye muscle force application. In order to see the image of the object clearly, the adjustment is constantly strengthened, the ciliary muscles continue to contract, and the choroid gradually loses its original elasticity and buffering capacity, resulting in secondary malnutrition and atrophy. Subsequently, the inelastic sclera also begins to deform, the posterior pole of the eyeball is extended, resulting in expansion of the posterior wall of the eyeball and stretching of the sclera at the posterior pole. The eye wall of adolescents is highly elastic and over-convergent, and the extraocular muscles exert pressure on the eyeball, resulting in relatively increased intraocular pressure. Over time, the posterior pole of the eyeball stretches and the eye axis lengthens. The ciliary muscle spasms, the choroid is pulled, the depth of the anterior chamber changes, the blood vessels become compressed and thin, the eyes are malnourished, the eyeball is congested, and the intraocular pressure increases. When the pressure exceeds a certain level, it induces eye deformation and eye axis growth, leading to myopia. Continuous near vision reaction and extraocular muscle compression cause congestion of the eye. After congestion, the amount of blood in the eye increases, which increases the pressure on the eye wall, thereby lengthening the eye axis; after congestion, protein exudates are produced, which soften the scleral connective tissue through the action of autolytic enzymes. The normal sclera can reduce the effect of autolytic enzymes because of the suprachoroidal space, but the suprachoroidal space is the narrowest at the posterior pole of the eyeball, and the choroidal capillaries are the thickest. Once the suprachoroidal space at the posterior pole disappears, the sclera is easier to stretch, and the hardness of the sclera during development is softer than that of adults, so myopia is prone to occur. It can be seen that the growth of the eye axis caused by excessive near vision is the root cause of myopia in adolescents.

[0004] Ordinary single-vision lenses currently on the market have little effect on myopia prevention and control. Various toric and defocus lenses use the defocus theory, which has a low myopia control effect and low efficiency. The basic logic theory of zoned defocus lenses developed by many manufacturers is based on the defocus theory. Due to the prominent defocus effect, the design and manufacturing are relatively difficult. Some products have unreasonable zone settings and serious aberrations and image jumps.

[0005] Prism technology is more often used to correct strabismus. The direction of the prism base toward the nose or downward can change the light entering the eye. In order to see the image after the angle is changed, the extraocular muscles pull the eyeball from the inward focus to the outward relaxation. At the same time, the intraocular muscles improve the adjustment, which can avoid the spasm and tension of the sclera and choroid caused by excessive adjustment, which will increase the intraocular pressure, lengthen the posterior pole of the eyeball, cause congestion of the eyeball, produce autolytic enzymes, soften the sclera, deform the eyeball, and increase the eye axis.

[0006] There are a small number of prism products on the market that are used for myopia correction. However, due to the lack of understanding of the mechanism of myopia occurrence and development, it is impossible to quantitatively analyze prism parameters, and there is no reasonable setting for the direction angle of the prism base. The prism base orientation angle of this type of product is fixed, and it cannot effectively combine the user's sitting habits, glasses height habits, and head orientation habits when wearing glasses. It is impossible to scientifically integrate the three elements of cylindrical lens, spherical lens, and prism, reasonably partition, avoid image jump, and wear comfortably, making it difficult to achieve good results in myopia prevention, control, and correction. Utility Model Content

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a lens that controls diopter and relieves cervical strain based on the eye muscle balance theory, and the lens has the function of inhibiting the occurrence and development of myopia refractive error of the user, thereby changing the light to maintain the balance of intraocular muscles and extraocular muscles, good scleral fiber elasticity, choroidal blood supply and normal nervous system function, greatly reducing the probability of occurrence and development of myopia, and the average myopia growth delay rate is 85.2%.

[0008] The technical solution of the utility model is as follows: a lens for controlling diopter and relieving cervical strain based on the eye muscle balance theory, characterized in that the lens surface is composed of three parts of variable proportions: a far vision area, an intermediate vision area, and a near vision area, and the lens base is a prism with a variable base angle.

[0009] Furthermore, the far vision zone is located at the upper part of the lens, the intermediate vision zone is located in the middle part of the lens, and the near vision zone is located at the lower part of the lens, and the area ratio of the three is set to 4:2:4, or the ratio of the far vision zone, the intermediate vision zone, and the near vision zone is adjusted and determined according to the wearer's habitual eye habits, head angle and sitting posture.

[0010] Furthermore, the preparation parameters of the far vision zone are: the spherical lens is +0.00DS—-7.00DS, the cylindrical lens parameter is +0.00DS—-6.00DS, and the prism preparation is 3△—5△.

[0011] Furthermore, the preparation parameters of the visual center area are +1.00DS—-5.00DS; the cylinder parameters are +1.00DS—-5.00DS, and the prism preparation is 4△—7△.

[0012] Furthermore, the preparation parameters of the near vision zone are +1.00DS—-4.00DS; the cylinder parameters are +1.00DS—-5.00DS, and the prism preparation is 6△—12△.

[0013] Furthermore, the distance vision zone and the intermediate vision zone may be combined into the same zone.

[0014] Furthermore, the direction of the prism base of the near vision zone is based on the vision of the optician. The prism base of the wearer's left eye can be adjusted between 300 degrees and 360 degrees, and the prism base of the right eye can be adjusted between 180 degrees and 240 degrees. The specific degree of the prism base must be measured based on the user's glasses wearing habits and head-lowering habits.

[0015] Furthermore, the degree measurement method of the prism base is as follows: according to the prism 360° base marking method, first measure the wearer's eyes when they are in a standard position (that is, the head position is parallel to the desktop, and the eyes are looking straight ahead and parallel to the desktop); secondly, measure the angle between the wearer's head and the desktop when the wearer lowers his head without paying attention; thirdly, measure the wearer's common eye angle habits when he is not paying attention, and finally combine the above three factors to give the prism base orientation parameters.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] This solution is a new ophthalmic lens based on the theory of eye muscle balance. Through the carefully designed partition function and the position angle of the partition lens, the images at far, medium and near distances can fall on the fovea of ​​the retina and effectively avoid the fatigue, tension and spasm of the eye muscles, improve the coordination of the eye muscles, avoid excessive adjustment and convergence and excessive pulling of the sclera due to long-term close-range eye use, so that the tension and spasm of the sclera and choroid cause the growth of the eye axis to avoid the occurrence and development of myopia. When looking far away, the head can be raised higher and the eyeballs can be turned upward and outward, which further improves the damage to the cervical spine when students bow their heads for a long time, avoids neck pain, stiffness and tension of the cervical and shoulder muscles, and reduces the probability of hunchback.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0020] Figure 1 It is a schematic diagram of the eyeglass lens of the utility model;

[0021] Figure 2 It is a schematic diagram of the glasses of the utility model;

[0022] Figure 3 It is a reference diagram of the posture state of use of the utility model;

[0023] Figure 4 It is a schematic diagram of the situation of using eyes at close range in the prior art;

[0024] Figure 5 It is a schematic diagram of long-distance eye use in the prior art;

[0025] Figure 6 It is a schematic diagram of prism parameters in the prior art.

[0026] In the figure, A is the far vision area; B is the intermediate vision area; C is the near vision area; and D is the prism base. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In an emmetropic eye, parallel external light rays pass through the eye's refractive system and converge into a focus, and accurately fall on the fovea centralis of the retina. Objects at different distances are mainly adjusted by the extraocular muscles and ciliary muscles, and the completed extraocular muscles drive the eyeball to converge and turn toward the image; when looking at near objects, the extraocular muscles drive the eyeball to converge (convergence), and the extraocular muscles gradually tense and contract. At the same time, the ciliary muscles contract, the ciliary crown forms a ring, the ciliary suspensory ligaments relax, and the lens becomes convex due to its elasticity; on the contrary, when looking at far objects, the extraocular muscles drive the eyeball to conduct reverse convergence movement, the ciliary muscles are in a relaxed state, the suspensory ligaments maintain a certain tension, and the lens is relatively flat under the traction of the suspensory ligaments.

[0029] The mechanism of myopia is completely opposite to that of long-distance vision. Generally speaking, adolescent primary and secondary school students with myopia use ordinary negative spherical lenses to look at the blackboard and the teacher to solve the problem of long-distance image clarity during school hours. In the rest of the time, they switch between short-distance and medium-distance vision at any time. At present, all sectors of society generally lack knowledge of ophthalmology, and most patients lack understanding of the mechanism of optometry. The use of eye protection products is often unscientific. Most students continue to use ordinary glasses with a single refractive feature when using their eyes at close range. The mirror image falls on the back of the fovea of ​​the retina, which can easily cause visual fatigue, defocus, excessive tension and spasm of the intraocular and extraocular muscles, and increase the burden on the eyes.

[0030] In order to ensure that distant images fall clearly on the fovea of ​​the retina, and to ensure that when seeing close images clearly, the eye muscles can avoid excessive adjustment and convergence, tension and spasm, and then pulling the sclera and choroid to lengthen the eye axis, and the characteristics of medium-distance images must also be taken into account. Based on this consideration, the utility model inventor creatively designed a new ophthalmic lens based on the eye muscle balance theory. Through the carefully designed partition function and the position and angle of the partition lens, the images of far, medium and near distances can fall on the fovea of ​​the retina and effectively avoid eye muscle fatigue, tension and spasm, improve eye muscle coordination, avoid excessive adjustment and convergence and excessive pulling of the sclera due to long-term close-range use of the eyes, so that the eye axis will increase due to tension and spasm of the sclera and choroid, and avoid the occurrence and development of myopia.

[0031] In this solution, the lens surface is composed of three parts with variable proportions: a far vision area (denoted as A), an intermediate vision area (denoted as B), and a near vision area (denoted as C), and the lens base is a prism with a variable base angle.

[0032] Among them, the far vision zone is the long-distance image zone, the intermediate vision zone is the medium-distance image zone, and the near vision zone is the short-distance image zone. The far vision zone is located at the upper part of the lens, the intermediate vision zone is located in the middle part of the lens, and the near vision zone is located at the lower part of the lens. By integrating the sub-lenses with three refractive characteristics into the same ophthalmic lens according to the different refractive characteristics of the lens and the individual characteristics of the user, it is ensured that the images from different areas are adapted to the corresponding myopia, intermediate vision, and hyperopia mechanisms.

[0033] Therefore, this solution can solve the problem that the mechanisms of distant, intermediate and near vision are completely different, which cannot be solved by single-vision lenses with only the same refractive characteristics for one eye. This allows the distant, intermediate and near vision to be switched at any time, while satisfying the requirements of seeing distant, intermediate and near distance images at the same time, which fall on the fovea of ​​the retina without excessive convergence and adjustment.

[0034] Through the refraction principle of the prism with its base tilted inward and downward, the close-range image is deflected toward the upper and outer side, thereby directing the eyeball to the upper and outer side. This is aimed at the common situation where the eyeballs converge downward when users read, write, use mobile phones or watch computers. The eyeballs are over-adjusted and focused, thereby relaxing the eye muscles, reducing the pulling and deformation of the sclera and choroid, and avoiding myopia caused by increased intraocular pressure, eyeball deformation, and axial length growth.

[0035] The lens structure of the scheme will be introduced in detail below.

[0036] Because of the difference in horizontal latent deviation, the convergence of human eyes is different even at the same viewing distance. This difference will lead to different degrees of eye muscle fatigue when people look at near objects. Figure 4 As shown, it is obvious that people with exotropia are more likely to suffer from visual fatigue than those with normal eye position when using their eyes at close range.

[0037] Similarly, due to the difference in vertical heterophoria, even if the viewing distance is the same, the downward or upward force of the eye muscles when viewing objects is different. When using the eyes at close range, people with superior heterophoria are more likely to suffer from visual fatigue than those without vertical heterophoria. Figure 5 shown.

[0038] Based on the difference between horizontal and vertical heterophoria of the human eye, in the process of fitting glasses, the principle of light refraction by prisms can be applied. Through the design of lens parameters, prisms can be used to compensate for the excessively high intensity of convergence and downward eye muscle force required by the human eye when using the near eyes, so that the eyes are in a relatively comfortable state when using the near eyes. Taking the example of horizontal heterophoria as exophoria and vertical heterophoria as hypophoria, the prism parameter solution is that the horizontal prism base direction is inward, the vertical prism base direction is upward, and the prism parameter size is The angle β is arctan(b / a) (both a and b can be obtained through optometry testing), as shown in the following example: Figure 6 shown.

[0039] Then in this lens, the area ratio of the far vision zone, the intermediate vision zone, and the near vision zone is set to 4:2:4. The three areas have different refractive characteristics. Different optical zones achieve good imaging of long-distance images, medium-distance images, and short-distance images entering the retina and meet the requirements and restrictions of different mechanisms for eye protection. Of course, the ratio of the three areas does not have to be limited to 4:2:4, and the specific ratio can also be further adjusted and determined according to the wearer's habitual eye habits, head angle, and sitting posture.

[0040] Among them, the main purpose of the far vision zone is to achieve the purpose of the fovea of ​​the macula through the optical zone obtained by the fusion of long-distance images through spherical lenses, cylindrical lenses and prisms under the action of unique physical properties, so as to achieve the effect of infinite vision and see more clearly and farther.

[0041] The preparation parameters of the far vision zone A are +0.00DS—-7.00DS for the spherical lens, +0.00DS—-6.00DS for the cylindrical lens, and 3△—5△ for the prism. In the far vision zone A, the image light passes through the prism of the base, and the light is deflected toward the tip of the prism due to refraction, driving the eye to deflect outward, and the image falls on the fovea of ​​the retina. At this time, the collection of extraocular muscles is further relaxed, and the circular ciliary muscle is in a relaxed state. The sclera and choroid return to a relatively original state, reducing the risk of myopia caused by axial length growth due to long-term tension spasm and pulling deformation.

[0042] After the light of the medium-distance image enters the eye, the visual center area further relaxes the adjustment function of the ciliary muscle and the convergence function of the extraocular muscles. In addition, due to the different adjustment and convergence abilities of different people, the appropriate transition can avoid the disadvantages of image jump and decreased adaptability caused by a large difference in the refractive parameter characteristics between the long-distance image area and the short-distance image area.

[0043] The preparation parameters of the central vision zone B are +1.00DS—-5.00DS; the cylinder parameters are +1.00DS—-5.00DS, and the prism preparation is 4△—7△. In order to reduce the image jump caused by the change of diopter in the distance vision zone and the central vision zone, the distance vision zone and the central vision zone can also be merged into one optical zone with the same refractive power and refractive characteristics.

[0044] The near vision zone uses the optical refraction principle of the base toward the inside and the inside to deflect the image at close range to the outside and the above, thereby changing the downward convergence of the eyeball and directing the eyeball to the outside and the above position. In order to see the close-range image clearly, the eyeball is over-adjusted and focused, thereby relaxing the eye muscles, relieving visual fatigue, reducing the pulling and deformation of the sclera and choroid, and avoiding myopia caused by increased intraocular pressure, eyeball deformation, and axial length growth.

[0045] As the eyeball converges under the action of the extraocular muscles, the intraocular muscles will further adjust in order to see the image more clearly. If this behavior lasts too long, it will inevitably lead to continuous tension and spasm of the intraocular muscles, resulting in different time and intensity of force application of the intraocular muscles, which will cause the eye muscles to lose balance. In order to see the image of the object clearly, the adjustment is constantly strengthened, and the ciliary muscles continue to contract, causing tension and spasm. The choroid gradually loses its original elasticity and buffering ability, and secondary malnutrition and atrophy. As a result, the inelastic sclera also begins to deform, and the posterior pole of the eyeball is extended. This causes the posterior wall of the eyeball to expand and the posterior pole sclera to stretch. The eye wall of adolescents is highly elastic and over-convergent, and the extraocular muscles exert pressure on the eyeball, resulting in relatively increased intraocular pressure. Over time, the posterior pole of the eyeball stretches and the eye axis lengthens. This causes the ciliary muscle to spasm, the choroid to be pulled, the depth of the anterior chamber changes, the blood vessels become compressed and thin, the eyes are malnourished, the eyeball is congested, and the intraocular pressure increases. When the pressure exceeds a certain level, it induces eyeball deformation and eye axis growth, leading to myopia. Continuous near vision reaction causes congestion of the eyeball. After congestion, the amount of blood in the eye increases, which increases the pressure on the eye wall, thereby extending the eyeball; after congestion, protein exudates are produced, which soften the scleral connective tissue through the action of autolytic enzymes. Normal sclera can reduce the action of autolytic enzymes because of the suprachoroidal space, but the suprachoroidal space in the posterior pole of the eyeball is the narrowest and the choroidal capillaries are the thickest. Once the suprachoroidal space in the posterior pole disappears, the sclera is easier to stretch, and the sclera hardness is softer than that of adults during development, so myopia is prone to occur. It can be seen that the growth of the eye axis caused by excessive near vision is the root cause of myopia in primary and secondary school students. Through the refractive function of the multifocal ophthalmic lens, the excessive near vision of young students in the learning process is converted to far vision, and the ciliary muscle is further relaxed, spasm and tension are relieved, and the pulling and deformation of the sclera and choroid are avoided, the intraocular pressure is increased, the eyeball is congested, the generation of autolytic enzymes, and the elongation and deformation of the eye axis are avoided, so as to achieve the purpose of controlling the occurrence and development of myopia.

[0046] In order to accurately determine the user's prism parameters and the direction and angle of the prism base, the user's eye position must be measured. Eye position refers to the position of the eyeball, which is reflected by the state of the visual axis. By accurately measuring the break point limit of the eye position, the initial state of the myopic patient's eyeball under relaxed conditions can be tested. The purpose of the break point measurement is to obtain the abduction limit ability of the eye position. Esotropia generally shows a smaller abduction limit ability, while exotropia generally shows a larger abduction limit ability. On this basis, the prism parameters are determined according to the actual conditions of different users.

[0047] The preparation parameters of the near vision zone C are +1.00DS—-4.00DS; the cylinder parameters are +1.00DS—-5.00DS, and the prism preparation is 6△—12△.

[0048] The direction of the prism base of the near vision zone C is based on the vision of the optician. The prism base of the wearer's left eye can be adjusted between 300 and 360 degrees; the prism base of the right eye can be adjusted between 180 and 240 degrees. The specific degree of the prism base must be measured based on the user's habit of wearing glasses and bowing their head.

[0049] According to the 360° base marking method of the prism, the base orientation parameters of the prism are determined by the user's head habits when reading or writing. First, the wearer's eyes are measured in the standard position when using their eyes (i.e., the head position is parallel to the desktop, and the eyes are looking straight ahead and the eyes are parallel to the desktop); secondly, the angle between the wearer's head and the desktop is measured when the wearer is not paying attention; and thirdly, the wearer's common eye angle habits are measured when not paying attention. The base orientation parameters of the prism are given by combining the above three factors.

[0050] The surface of the ophthalmic lens can be realized by using numerical representation of parameters describing the lens. Then, a 3D model is established and a mold is manufactured based on the numerical representation of the lens manufacturing, and the lens is mass-produced by using the mold through a molding or casting process. Another alternative is that the lens can also be numerically represented and then converted into a computer language according to the 3D data and input into a 3D printer for printing.

[0051] Specifically, to obtain further other parameters for fitting glasses, it is also necessary to fully describe the user's sitting posture and head angle posture and to describe and record them completely and accurately with the prescription, for example, describing the sitting posture and head angle of the wearer when he or she is looking at a given target under near vision conditions. These postures and their user-related specific behaviors can help the user better adapt to the use of the fitted glasses. The wearer's posture may involve looking at a mobile phone or a book, etc. Figure 3 The commonly used postures of standard users are described in the figure. The posture values ​​described by these glasses parameters are converted into glasses prescription values ​​to better implement the utility model, so as to relax the eye muscles to avoid spasm and tension, and to lift the eyeballs to turn outward to avoid neck pain, stiffness of the cervical and shoulder muscles, and cervical strain caused by excessive bowing.

[0052] Figure 3 The relevant marks in are as follows: HT indicates the plane representing the vertical tilt of the head, P is the horizontal reference plane, M is the elevation angle of the head tilt, which is measured in the vertical plane between the planes PT and P, JR indicates the line of sight direction of the wearer marked as Y, N is the angle of lowering the line of sight, which is between the plane P, X is the angle of raising or lowering the eyes, which is between the plane P, C is the tilt angle of user Y when using a mobile phone, a book, etc. to view objects, JR is the reading distance in near vision, which is measured between the eyes of user Y and the object being used.

[0053] These parameters can be measured, for example, by measuring the user Y and the object used. When the user Y is in use, several measurements are taken and the obtained data are averaged to obtain the measured value used by the user. The parameters that the user should have when using the lens are gradually obtained. These parameters include the habitual eye distance, the angle of lowering the head when using a mobile phone or reading, the angle of the body leaning forward, the angle between the eyeball and the object, etc.

[0054] To sum up, when using this lens to look at close objects, the eyes can be further deflected outward and upward, avoiding long-term bending down to do homework and playing with mobile phones for a long time, etc., which will cause excessive concentration of the eyeballs and lead to fatigue and tension of the eye muscles, resulting in pulling of the sclera and choroid, deformation, and aggravated elongation of the eye axis, effectively controlling the occurrence and development of myopia.

[0055] After the eyes switch from near to far, the head does not need to be lowered as before to read, but can be raised higher, and the eyeballs turn upward and outward, further improving the damage to the cervical spine caused by students lowering their heads for a long time. It avoids neck pain, stiffness and tension of the cervical spine and shoulder muscles, and reduces the probability of hunchback.

[0056] Such glasses can make the wearer see farther, more clearly and more easily while allowing the light of distant images to be clear and the eye muscles to relax; they can make the light of medium-distance images fall better on the fovea of ​​the retina, and the eyeballs can be properly turned outward and upward for clearer vision; the eyeballs in the close-range image area can be further deflected outward and upward to avoid excessive concentration of the eyeballs due to close viewing for too long, which can lead to fatigue and tension of the eye muscles, pulling of the sclera and choroid, deformation of the choroid and aggravated elongation of the eye axis, effectively improving eye muscle coordination, reducing abnormal development of the sclera, and effectively controlling the occurrence and development of myopia.

[0057] This type of ophthalmic lens is safe, effective and easy to promote and apply. It is an ideal health care eyewear for the correction, prevention, control and treatment of emmetropia and myopia. It has a good anti-fatigue effect for adults and is especially suitable for the prevention and control of myopia among adolescents aged 6 to 16 years old.

[0058] While effectively correcting refractive errors, it also relaxes the internal and external eye muscles, thereby controlling the tension and spasm of the internal and external eye muscles caused by excessive nearsightedness, which in turn causes the sclera and choroid to be pulled and deformed, and the eye axis to lengthen, which is the purpose of axial myopia. Moreover, the processing technology of lenses with this optical design is more convenient than other similar lenses on the market. It can be customized or mass-produced by injection molding. It has a wide range of options, better visual effects, and relatively low processing costs, which is conducive to expanding the application of eye muscle balance theory and improving market acceptance.

[0059] This lens can be used to make Figure 2The glasses shown are composed of a frame, temples, and lenses. The glasses frame composed of the frame and temples is not limited here and can be an ordinary glasses frame in the existing market. The lenses can be made of optical glass or resin materials and are prepared and processed using existing lens technology.

Claims

1. A lens for controlling diopter and relieving cervical strain based on the eye muscle balance theory, characterized in that: The surface of the lens is composed of three parts with variable proportions: a far vision zone, an intermediate vision zone, and a near vision zone, and the lens base is a prism with a variable base angle. The far vision zone is located at the upper part of the lens, the intermediate vision zone is located in the middle part of the lens, and the near vision zone is located at the lower part of the lens. The area ratio of the three is set to 4:2:4; or the ratio of the far vision zone, the intermediate vision zone, and the near vision zone is adjusted and determined according to the wearer's habitual eye habits, head angle, and sitting posture.

2. The lens for controlling diopter and relieving cervical strain based on the eye muscle balance theory according to claim 1, characterized in that: The preparation parameters of the far vision zone are: +0.00DS—-7.00DS for the spherical lens, +0.00DS—-6.00DS for the cylindrical lens, and 3△—5△ for the prism.

3. The lens for controlling diopter and relieving cervical strain based on the eye muscle balance theory according to claim 1, characterized in that: The preparation parameters of the visual center area are +1.00DS—-5.00DS; the cylinder parameters are +1.00DS—-5.00DS, and the prism preparation is 4△—7△.

4. The lens for controlling diopter and relieving cervical strain based on the eye muscle balance theory according to claim 1, characterized in that: The preparation parameters of the near vision zone are +1.00DS—-4.00DS; the cylinder parameters are +1.00DS—-5.00DS, and the prism preparation is 6△—12△.

5. The lens for controlling diopter and relieving cervical strain based on the eye muscle balance theory according to claim 1, characterized in that: The distance vision zone and the intermediate vision zone can be combined into the same zone.

6. The lens for controlling diopter and relieving cervical strain based on the eye muscle balance theory according to claim 4, characterized in that: The direction of the prism base in the near vision zone is based on the vision of the optician. The prism base of the wearer's left eye can be adjusted between 300 degrees and 360 degrees, and the prism base of the right eye can be adjusted between 180 degrees and 240 degrees. The specific degree of the prism base must be measured based on the user's glasses wearing habits and head-lowering habits.

Images