Method for prolonging myopia prevention and control efficacy

Abstract

The invention discloses a myopia prevention and control effect prolonging method. The method comprises the following steps: determining the effective time of at least two groups of standby lenses; at least two groups of standby lenses are used as lenses of the myopia prevention and control glasses; determining the effective time of at least two groups of standby lenses; and controlling the use time of any group of lenses in the myopia prevention and control glasses, so that the use time does not exceed the effective time corresponding to the lenses. According to the method, at least two lenses with different optical designs can be alternately used from the angle of visual adaptability, and when the brain generates adaptability to certain specific visual imaging stimulation, peripheral retina imaging signals are changed, the adaptability is broken, and the imaging effect is improved. Therefore, the myopia prevention and control effect cannot be gradually reduced along with the generation of visual nerve self-adaptability, and the myopia prevention and control effect is improved to the maximum extent.

Description

Technical Field

[0001] The present application relates to the field of eyewear technology, and in particular to a method for extending the effectiveness of myopia prevention and control. Background Art

[0002] Myopia is a global social problem and a medical problem. With the increase of myopia and the continuous growth of the eye axis, the risk of various fundus lesions increases exponentially. Controlling the development of myopia has become a key issue affecting the eye health of the whole people. To control the development of myopia, we must start with the fundamental mechanism of eye axis growth. The main hypotheses currently popular include accommodation theory, peripheral defocus theory, contrast theory and aberration theory. Based on these theories, the optical products currently on the market for intervention and control of myopia progression (i.e. myopia prevention and control glasses) mainly include orthokeratology lenses, multifocal soft lenses, myopia prevention and control frame glasses, etc.

[0003] However, the effectiveness of any myopia prevention and control method will decrease as the glasses are used (i.e. the time the user wears them) increases. Summary of the invention

[0004] The present application provides a method for extending the myopia prevention and control efficacy, the purpose of which is to extend the myopia prevention and control efficacy.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A method for extending the efficacy of myopia prevention and control, comprising:

[0007] Determine the effective time of at least two sets of spare lenses; the optical designs of the at least two sets of spare lenses are different from each other; the spare lenses control the imaging of the peripheral retina based on the optical designs to achieve myopia prevention and control efficacy; the effective time is used to characterize the time during which the spare lenses maintain the myopia prevention and control efficacy;

[0008] Based on the at least two sets of spare lenses, use them as lenses for myopia prevention and control glasses;

[0009] The use time of any group of the lenses in the myopia prevention and control glasses is controlled so that the use time does not exceed the effective time corresponding to the lenses.

[0010] Optionally, determining the effective time of the at least two sets of spare lenses includes: obtaining eyeball bio-optical parameters of the wearer during the period of wearing any set of spare lenses; the eyeball bio-optical parameters are related to the time that the spare lenses maintain the myopia prevention and control effect;

[0011] Based on the eye bio-optical parameters of the wearer during the period of wearing any set of spare lenses, the effective time of the set of spare lenses is determined.

[0012] Optionally, the eyeball bio-optical parameters include axial length, eyeball diopter, choroidal thickness, choroidal blood flow velocity or choroidal blood flow density;

[0013] Based on the eye bio-optical parameters of the wearer during wearing any set of spare lenses, determining the effective time of the set of spare lenses, including:

[0014] Based on the change relationship between at least one of the eyeball bio-optical parameters and the specified time, determine the specified time corresponding to a certain change value of the eyeball bio-optical parameter; based on the specified time, determine the effective time of the spare lens.

[0015] Optionally, determining the effective time of the at least two sets of spare lenses includes:

[0016] Based on theory or clinical experience, estimate the time that any set of spare lenses can maintain their myopia prevention and control effectiveness, and determine the effective time of the set of spare lenses.

[0017] Optionally, the optical designs of the at least two sets of spare lenses each include a correction area and a control area, the correction area is used to correct vision, and the control area is used to generate an imaging signal that stimulates the peripheral retina to control the imaging of the peripheral retina.

[0018] Optionally, the imaging signal stimulation means adopted by the at least two groups of spare lenses corresponding to the control areas are different.

[0019] Optionally, the imaging signal stimulation means adopted by the at least two groups of spare lenses corresponding to the control areas are the same, but the formed imaging stimulation signals are different.

[0020] Optionally, controlling the usage time of any group of the lenses in the myopia prevention and control glasses so that the usage time does not exceed the effective time corresponding to the lenses includes:

[0021] Control the lenses of any group in the myopia prevention and control glasses to be used in turn, and the use time of any group of lenses does not exceed the effective time corresponding to the lenses.

[0022] Optionally, also include:

[0023] The usage time of any set of lenses in the myopia prevention and control glasses is sent to a target terminal, so that the target terminal displays the usage time of any set of lenses.

[0024] Optionally, the myopia prevention and control glasses include contact lenses and frame glasses.

[0025] The technical solution provided by the present application determines the effective time of at least two sets of spare lenses, and based on the at least two sets of spare lenses, as the lenses of myopia prevention and control glasses, controls the use time of any set of lenses in the myopia prevention and control glasses so that the use time does not exceed the effective time corresponding to the lenses. From the perspective of visual adaptability, the present application can change the peripheral retinal imaging signal when the brain adapts to a certain specific visual imaging stimulus, break the adaptability of the visual nerve to the inherent imaging stimulus signal, thereby maintaining the myopia prevention and control efficacy and not gradually decreasing with the generation of visual nerve adaptability, thereby maximizing the myopia prevention and control efficacy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of a process for extending the myopia prevention and control efficacy provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of retinal imaging provided in an embodiment of the present application;

[0029] Figure 3 Another schematic diagram of retinal imaging provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of another retinal imaging provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of a spare lens provided in an embodiment of the present application;

[0032] Figure 6 A schematic diagram of another spare lens provided in an embodiment of the present application;

[0033] Figure 7 A schematic diagram of ray tracing provided in an embodiment of the present application;

[0034] Figure 8 Another ray tracing schematic diagram provided for an embodiment of the present application;

[0035] Fig. 9 A schematic diagram of another spare lens provided in an embodiment of the present application;

[0036] Fig.10A schematic diagram of another spare lens provided in an embodiment of the present application;

[0037] Fig.11 An imaging schematic diagram provided in an embodiment of the present application;

[0038] Fig.12 Another imaging schematic diagram provided in an embodiment of the present application;

[0039] Fig.13 Another imaging schematic diagram provided in an embodiment of the present application;

[0040] Fig.14 Another imaging schematic diagram provided for an embodiment of the present application. DETAILED DESCRIPTION

[0041] 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 only 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 ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] The applicant discovered that the human visual system will make adaptive adjustments according to changes in the external environment, and visual adaptation is a widely existing phenomenon. The brain has the ability to produce correct cognition. Visual adaptation can be reflected in brightness adaptation, contrast adaptation, color adaptation, motion adaptation, etc. The most significant effect of visual adaptation is that it will affect the perception of subsequently presented stimuli. Therefore, the human visual system will make adaptive adjustments according to the stimulation of external light. According to existing clinical data, the myopia prevention and control effect of myopia prevention and control glasses will begin to decline significantly every six months or a year, which may be caused by the adaptation of the human visual system.

[0043] Based on the above-mentioned discovery of the applicant, the present application proposes a new method of using lenses of different optical designs in rotation based on two or more optical designs that cause different stimulation signals to retinal imaging. After using one optical design to produce a certain retinal imaging signal for a period of time and forming visual adaptation, change to another different optical design to produce a different retinal imaging signal, and finally use them alternately to prolong the myopia prevention and control effect.

[0044] like Figure 1 As shown, it is a flow chart of a method for extending the myopia prevention and control efficacy provided in an embodiment of the present application, which includes the following steps.

[0045] S101: Determine the effective time of at least two sets of spare lenses.

[0046] Among them, the effective time is used to characterize the time that the spare lenses maintain the myopia prevention and control effect. The time to maintain the myopia prevention and control effect here means that the effect remains basically stable and will not decline significantly. The stabilization time can be determined based on the amount of change in the bio-optical parameters of the eye caused by the lenses. In addition, the optical designs of at least two sets of spare lenses are different. The spare lenses are based on optical design to control the imaging of the peripheral retina to achieve myopia prevention and control effects.

[0047] In some examples, a set of spare lenses includes a left eye lens and a right eye lens, and the optical designs of the left eye lens and the right eye lens can be the same or different, mainly depending on the differences in visual acuity and axial length of the left eye and the right eye.

[0048] Optionally, the specific implementation process of determining the effective time of at least two sets of spare lenses includes: obtaining the eye bio-optical parameters of the wearer during the period of wearing any set of spare lenses, wherein the eye bio-optical parameters are related to the time that the spare lenses maintain the myopia prevention and control effect, and then determining the effective time of the set of spare lenses based on the eye bio-optical parameters of the wearer during the period of wearing any set of spare lenses.

[0049] It should be noted that the wearer's ocular bio-optical parameters while wearing the spare lenses include one or more of the axial length, ocular refractive power, choroidal thickness, choroidal blood flow velocity or choroidal blood flow density, etc. These parameters can be measured by optical instruments.

[0050] Optionally, based on the wearer's ocular bio-optical parameters while wearing any set of spare lenses, the specific implementation process of determining the effective time of the set of spare lenses includes: determining a specified time corresponding to a certain change value of the ocular bio-optical parameter based on the change relationship between at least one ocular bio-optical parameter and the specified time; and determining the effective time of the spare lenses based on the specified time.

[0051] As an example, the scheme is explained using the eye axis change rate, which refers to the amount of change in the eye axis length per unit time. In addition, the eye axis change rate can be calculated by measuring the eye axis length with an optical instrument.

[0052] In some examples, within the first three months of wearing myopia prevention and control glasses, the axial length is measured every half month as a follow-up period, and the axial change rate is 0.01mm / half month. The axial change rate of each subsequent month is 0.02mm / half month. The axial change rate of other months except the first three months is significantly higher than that of the first three months, that is, the myopia prevention and control effect is weakened. It is understandable that when the axial change rate is greater than the specified change rate, it means that the axial growth is relatively rapid, that is, when the myopia prevention and control effect declines significantly, it is necessary to replace the myopia prevention and control glasses. The specified change rate here is determined according to the actual condition of the eyeball or according to the theoretical / clinical value.

[0053] In one possible implementation, the degree of change of the axial length change rate is used to illustrate the solution. The degree of change of the axial length change rate = average change rate / average axial length change rate during initial wear. The average change rate refers to the rate of change of the average axial length in the months other than the initial three months of wear. The average axial length change rate during initial wear refers to the rate of change of the average axial length in the first three months of wearing the myopia prevention and control glasses. The so-called degree of change of the axial length change rate indicates how fast the axial length change rate changes. When the degree of change is large, it means that the axial length grows faster, that is, when the myopia prevention and control effect declines significantly, it is necessary to replace the myopia prevention and control glasses. The degree of change here is determined according to the actual condition of the eyeball or according to theoretical / clinical values.

[0054] The above uses the axial length as a representative example, and the method of determining the efficacy time through other ocular bio-optical parameters is similar.

[0055] Optionally, the specific implementation process of determining the effective time of at least two sets of spare lenses may also be: estimating the time for any set of spare lenses to maintain myopia prevention and control effectiveness based on theory or clinical experience, and determining the effective time of the set of spare lenses.

[0056] In a possible implementation, it is estimated based on clinical experience that the spare lens A can maintain myopia prevention and control effectiveness for 25 days, so it can be determined that the effective time of the spare lens A is 25 days.

[0057] In some examples, the effective time of the spare lens can also be set according to the prevention and control efficacy time when the lens is designed. For example, if the prevention and control efficacy when the lens is designed is 2 months, then 2 months is used as the effective time of the spare lens.

[0058] For at least two groups of spare lenses, a single method for determining the effective time of the lenses may be adopted, or any combination of the above-mentioned multiple determination methods may be adopted.

[0059] In an embodiment of the present application, the optical design of at least two sets of spare lenses includes a correction area and a control area. The correction area is used to correct vision, and the control area is used to form different peripheral retinal imaging stimulation signals to control the imaging of the peripheral retina.

[0060] Optionally, the imaging signal stimulation means adopted by at least two sets of spare lenses corresponding to the control area are different, that is, the control principles adopted are different. In some examples, the imaging signal stimulation means involved in the embodiments of the present application include but are not limited to: peripheral myopia defocus, multi-point defocus, reducing the contrast of peripheral retinal imaging, increasing the focal depth of peripheral retinal imaging, weakening the difference between the front, upper and rear images of the peripheral retina, and increasing the similarity of the front, upper and rear images of the retina.

[0061] Optionally, at least two sets of spare lenses have the same imaging signal stimulation means for the corresponding prevention and control areas, but the resulting imaging stimulation signals are different. Different stimulation signals refer to different imaging signals caused by the same stimulation means, such as signal strength, quantity, direction, etc., which are specifically manifested in differences in the amount of lens defocus, the amount of contrast reduction, and the degree of depth of focus. For example, spare lens A and spare lens B both use peripheral myopia defocus to generate imaging signals that stimulate the peripheral retina. The degree of stimulation of spare lens A is different from that of spare lens B, that is, the myopia defocus of spare lens A is greater than that of spare lens B, then spare lens A and spare lens B form different imaging stimulation signals.

[0062] The so-called defocus refers to the blurred phenomenon caused by the lack of image formation on the retina. The focus in front of the retina is called myopic defocus, and the focus behind the retina is called hyperopic defocus.

[0063] The so-called depth of focus is the abbreviation of focal depth. Specifically, when the change of the system wave aberration caused by the movement of the eye image plane does not exceed one-quarter of the wavelength, the range within which the image plane can move is considered to be the focal depth of the eye. For the eye, the so-called depth of focus refers to the close size of the spot within a certain range in front and behind the retina.

[0064] In some examples, peripheral myopia defocus is used to stimulate the imaging signal of the peripheral retina, and the imaging of the peripheral retina is induced as follows: Figure 2 shown.

[0065] In some examples, the imaging signal of the peripheral retina is stimulated by increasing the focal depth of the peripheral retinal imaging, thereby causing the imaging of the peripheral retina to be as follows: Figure 3 shown.

[0066] In some examples, the imaging signal of the peripheral retina is stimulated by weakening (or enhancing) the difference between the front, top, and back images of the peripheral retina, so that the imaging of the peripheral retina is induced. Figure 4As shown ( Figure 4 The 1.5D and 3D shown in the figure represent the distance between the imaging signal and the retina).

[0067] S102: Using at least two sets of spare lenses as lenses for myopia prevention and control glasses.

[0068] Optionally, myopia prevention and control glasses include contact lenses and frame glasses.

[0069] S103: Control the usage time of any set of lenses in the myopia prevention and control glasses so that the usage time does not exceed the effective time corresponding to the lenses.

[0070] Among them, by controlling the usage time of any group of lenses in the myopia prevention and control glasses so that the usage time does not exceed the corresponding effective time of the lenses, it is possible to achieve the alternating use of at least two lenses with different optical designs, and to ensure that when the brain adapts to a certain specific visual imaging stimulus, the peripheral retinal imaging signal is changed to break the adaptability of the visual nerve to the inherent imaging stimulus signal.

[0071] Optionally, the specific implementation process of controlling the usage time of any group of lenses in the myopia prevention and control glasses so that the usage time does not exceed the effective time corresponding to the lenses includes: controlling the use of any group of lenses in the myopia prevention and control glasses in turn, and the usage time of any group of lenses does not exceed the effective time corresponding to the lenses.

[0072] In some examples, three groups of spare lenses are determined as lenses for myopia prevention and control glasses, namely spare lens A, spare lens B and spare lens C. The implementation scenario of controlling the rotation use of any group of lenses in the myopia prevention and control glasses can be: use spare lens A first, and when the usage time of spare lens A reaches the effective time corresponding to spare lens A, use spare lens B, when the usage time of spare lens B reaches the effective time corresponding to spare lens B, use spare lens C, when the usage time of spare lens C reaches the effective time corresponding to spare lens C, it is the turn of spare lens A to be used, and so on, to ensure that the number of times the three groups of spare lenses are used remains synchronized.

[0073] In order to be able to remind users (which can be wearers of myopia prevention and control glasses) to replace lenses in time, the usage time of the lenses can also be shown to users so that they can be informed when to replace them.

[0074] Optionally, the usage time of any set of lenses in the myopia prevention and control glasses may also be sent to the target terminal, so that the target terminal displays the usage time of any set of lenses.

[0075] In the embodiments of the present application, the target terminal includes but is not limited to a smart phone and a smart watch.

[0076] The process shown in S101-S103 above can achieve the alternating use of at least two lenses of different optical designs from the perspective of visual adaptability. When the brain adapts to a certain visual imaging stimulus, the peripheral retinal imaging signal is changed to break the adaptability, thereby maintaining the myopia prevention and control efficacy and not gradually decreasing with the emergence of visual nerve adaptability, thereby maximizing the myopia prevention and control efficacy.

[0077] In order to facilitate understanding of the specific implementation scenarios of the method for extending the myopia prevention and control efficacy shown in the present application, the embodiments of the present application are described in detail based on the alternating use scenarios of lenses with different optical designs.

[0078] by Figure 5 and Figure 6 Taking the spare lenses shown as an example, it is assumed that the myopia prevention and control glasses are soft corneal contact lenses.

[0079] exist Figure 5 In the spare lens A shown, the diameter of the optical zone of the spare lens A is 9mm, and the optical zone includes a correction zone and a prevention and control zone. The correction zone and the prevention and control zone are distributed in concentric rings. Specifically, the correction zone includes zone A1, which is located at the center of the concentric rings and is circular. The radius of zone A1 is 1.5mm and the refractive power is -3D (D is the unit of measurement for refractive power). The prevention and control zone includes zone A2, zone A3 and zone A4. The ring width of the circular ring to which zone A2 belongs is 1.5mm and the relative refractive power to zone A1 is +3D. The ring width of the circular ring to which zone A3 belongs is 1mm and the relative refractive power to zone A1 is +1.5D. The ring width of the circular ring to which zone A4 belongs is 0.5mm and the refractive power is the same as that of zone A1. Based on zones A2, A3 and A4, the spare lens A can achieve peripheral myopic defocus. The imaging ray tracing of the peripheral retina caused by the correction zone is shown as follows. Figure 7 shown.

[0080] exist Figure 6 In the spare lens B shown, the diameter of the optical zone of the spare lens B is 9mm, and the optical zone includes a correction zone and a control zone, and the correction zone and the control zone are distributed in concentric rings. Specifically, the correction zone includes zone B1, which is located at the center of the concentric rings and is circular, and the radius of zone B1 is 1.5mm and the refractive power is -3D. The control zone includes zone B2 and zone B3. The ring width of the circular ring to which zone B2 belongs is 2mm and provides a first-order spherical aberration of +0.3um, and the ring width of the circular ring to which zone B3 belongs is 1.5mm and provides a first-order spherical aberration of +0.6um superimposed on a second-order spherical aberration of +0.3um. Based on zone B2 and zone B3, the spare lens B can increase the imaging depth of the peripheral retina, and the resulting imaging ray tracing of the peripheral retina is shown as follows. Figure 8 shown.

[0081] The so-called spherical aberration means that when a monochromatic conical light beam is emitted from an object point on the main axis to the eyeball, after being refracted by the optical series, if the light rays of the original light beam with different aperture angles cannot intersect at the same position on the main axis, so as to form a diffuse light spot (commonly known as a blur circle) at the ideal image plane on the main axis, then the imaging error of the eyeball is called spherical aberration.

[0082] for Figure 5 and Figure 6 As for the spare lenses shown, spare lens A and spare lens B are both effective for three months, and are used in turn as lenses of the myopia prevention and control glasses to ensure that users use spare lens A and spare lens B alternately every three months, using different imaging signal stimulation methods to cause different imaging signal stimulation to the optic nerve, so as to prolong the myopia prevention and control effect of the myopia prevention and control glasses during long-term use.

[0083] by Fig. 9 and Fig.10 Taking the spare lenses shown as an example, it is assumed that the myopia prevention and control glasses are frame glasses.

[0084] exist Fig. 9 In the spare lens C shown, the diameter of the optical zone of the spare lens C is 42mm, and the optical zone includes a correction zone and a prevention and control zone, and the correction zone and the prevention and control zone are distributed in concentric rings. Specifically, the correction zone includes zone C1, which is located at the center of the concentric rings and is circular. The radius of zone C1 is 3mm and the refractive power is -3D. The prevention and control zone includes zone C2, zone C3 and zone C4. Each zone is provided with a microstructure (such as a microlens, etc.) that provides multi-point defocus. The ring width of the circular ring to which zone C2 belongs is 4mm, and the relative refractive power of its microstructure relative to zone C1 is +3D. The ring width of the circular ring to which zone C3 belongs is 6mm, and the relative refractive power of its microstructure relative to zone C1 is +1.5D. The ring width of the circular ring to which zone C4 belongs is 8mm, and the relative refractive power of its microstructure relative to zone C1 is +3D. Based on zones C2, C3 and C4, the spare lens C can realize multi-point defocus imaging signals in the peripheral retina, and the imaging of the peripheral retina caused by it is as shown in FIG. Fig.11 shown.

[0085] exist Fig.10In the spare lens D shown, the diameter of the optical zone of the spare lens D is 42mm, and the optical zone includes a correction zone and a control zone, and the correction zone and the control zone are distributed in concentric rings. Specifically, the correction zone includes zone D1, which is located at the center of the concentric rings and is circular, and the radius of zone D1 is 3mm and the diopter is -3D (D is the unit of diopter). The control zone includes zone D2, zone D3 and zone D4, and the three zones may contain optical diffusion structures (such as pits, protrusions, etc.) of different designs with regular or irregular sizes and shapes to reduce the peripheral retinal imaging contrast. The ring width of the ring belonging to zone D2 is 1mm and reduces the contrast by 2% to 10%, the ring width of the ring belonging to zone D3 is 1mm and reduces the contrast by 11% to 20%, and the ring width of the ring belonging to zone D4 is 1mm and reduces the contrast by 21% to 30%. The astigmatism size of zone D2, zone D3 and zone D4 is decreasing. Based on the regions D2, D3 and D4, the backup lens D can reduce the contrast of the peripheral retina, resulting in an imaging signal that stimulates the peripheral retina, and the resulting imaging of the peripheral retina is as follows: Fig.12 shown.

[0086] for Fig. 9 and Fig.10 As for the spare lenses shown, spare lens C and spare lens D are both based on three months as the effective period, and are rotated as the lenses of the myopia prevention and control glasses to ensure that users use spare lens C and spare lens D alternately every three months, using different imaging signal stimulation methods to cause different imaging signal stimulation to the optic nerve, so as to prolong the myopia prevention and control effect of the myopia prevention and control glasses during long-term use.

[0087] In some examples, three sets of spare lenses are used as lenses for myopia prevention and control glasses. Specifically, the three sets of spare lenses are spare lens 1, spare lens 2, and spare lens 3, and spare lens 1 and spare lens 3 both adopt an optical design that increases the focal depth of peripheral retinal imaging. However, spare lens 1 and spare lens 3 correspond to different stimulus signals. The focal depth of spare lens 1 is as follows: Fig.13 As shown, it is a diffuse light spot in the vertical direction. The focal depth of the spare lens 3 is as follows: Fig.14 As shown, it is a diffuse light spot in the horizontal direction, that is, the same imaging signal stimulation means is used, but different imaging stimulation signals are formed. Spare lens 2 adopts a multi-point defocus optical design. Through the wearer's eye bio-optical parameters during the period of wearing spare lens 1, spare lens 2 and spare lens 3 respectively, it is determined that spare lens 1 is effective for half a month, spare lens 2 is effective for three months, and spare lens 3 is effective for half a month. In the order of spare lens 1, spare lens 2 and spare lens 3, spare lens 1, spare lens 2 and spare lens 3 are used in turn, so that the myopia prevention and control effects of spare lens 1, spare lens 2 and spare lens 3 are extended.

[0088] It should be noted that based on the lens design and lens instructions of the above-mentioned myopia prevention and control glasses, it is possible to achieve the alternating use of at least two lenses with different optical designs from the perspective of visual adaptability. When the brain adapts to a certain specific visual imaging stimulus, the peripheral retinal imaging signal is changed to break the adaptability, thereby maintaining the myopia prevention and control efficacy and not gradually decreasing with the generation of visual nerve adaptability, thereby maximizing the myopia prevention and control efficacy.

[0089] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0090] Although several specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present application. Certain features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination.

[0091] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. A method for extending the efficacy of myopia prevention and control, characterized in that: include: Determine the effective time of at least two sets of spare lenses; the optical designs of the at least two sets of spare lenses are different from each other; the spare lenses control the imaging of the peripheral retina based on the optical designs to achieve myopia prevention and control efficacy; the effective time is used to characterize the time during which the spare lenses maintain the myopia prevention and control efficacy; Based on the at least two sets of spare lenses, use them as lenses for myopia prevention and control glasses; The use time of any group of the lenses in the myopia prevention and control glasses is controlled so that the use time does not exceed the effective time corresponding to the lenses.

2. The method according to claim 1, characterized in that Determining the effective time of the at least two sets of spare lenses comprises: Obtaining ocular bio-optical parameters of the wearer during the period of wearing any set of spare lenses; the ocular bio-optical parameters are related to the time during which the spare lenses maintain the myopia prevention and control effect; Based on the eye bio-optical parameters of the wearer during the period of wearing any set of spare lenses, the effective time of the set of spare lenses is determined.

3. The method according to claim 2, characterized in that The eyeball bio-optical parameters include axial length, eyeball diopter, choroidal thickness, choroidal blood flow velocity or choroidal blood flow density; Based on the eye bio-optical parameters of the wearer during wearing any set of spare lenses, determining the effective time of the set of spare lenses, including: Based on the relationship between the change of at least one of the eyeball bio-optical parameters and the specified time, determine the specified time corresponding to a certain change value of the eyeball bio-optical parameter; Based on the designated time, an effective time of the spare lens is determined.

4. The method according to any one of claims 1 to 3, characterized in that Determining the effective time of the at least two sets of spare lenses comprises: Based on theory or clinical experience, estimate the time that any set of spare lenses can maintain their myopia prevention and control effectiveness, and determine the effective time of the set of spare lenses.

5. The method according to claim 1, characterized in that The optical designs of the at least two sets of spare lenses each include a correction area and a control area, the correction area is used to correct vision, and the control area is used to generate an imaging signal that stimulates the peripheral retina to control the imaging of the peripheral retina.

6. The method according to claim 5, characterized in that The imaging signal stimulation means adopted by the at least two groups of spare lenses corresponding to the control areas are different from each other.

7. The method according to claim 5, characterized in that The imaging signal stimulation means adopted by the at least two groups of spare lenses corresponding to the control areas are the same, but the imaging stimulation signals formed are different.

8. The method according to claim 1, characterized in that Controlling the usage time of any group of the lenses in the myopia prevention and control glasses so that the usage time does not exceed the effective time corresponding to the lenses, including: Control the lenses of any group in the myopia prevention and control glasses to be used in turn, and the use time of any group of lenses does not exceed the effective time corresponding to the lenses.

9. The method according to claim 1, characterized in that: Also includes: The usage time of any set of lenses in the myopia prevention and control glasses is sent to a target terminal, so that the target terminal displays the usage time of any set of lenses.

10. The method according to claim 1, characterized in that The myopia prevention and control glasses include contact lenses and frame glasses.

Images