CN112656361B - Calculation method and application of functional spectacle lens parameters - Google Patents

Abstract

The invention provides a calculation method and application of functional eyeglass lens parameters, which can calculate the value of the needed additional functional eyeglass according to the actual visual function condition of eyes. The invention solves the problem that eyes cannot be used for a long time in a close range, and has the effects of reducing asthenopia, preventing and controlling myopia and the like.

Description

Calculation method and application of functional spectacle lens parameters

technical field

The invention belongs to the field of spectacles and relates to functional spectacles, in particular to a calculation method and application of functional spectacles lens parameters.

Background technique

With the change of lifestyle and the increase of study and work pressure, the time and intensity of people's close-up eye use have greatly increased. Excessive close-up eye use will cause visual fatigue, the occurrence of myopia, and the increase in the degree of myopia. Studies have shown that continuous close work is one of the main reasons for the development of myopia. The visual functions that are most closely related to near-distance eye use are accommodation and collection. The adjustment function represents the focusing ability of the eyes, and the closer the distance, the greater the adjustment force required. Convergence is the simultaneous inward turning of both eyes so that the sight lines of both eyes converge on the same visual target. When the adjustment force and the collection force are insufficient, the corresponding adjustment function abnormality and collection function abnormality will occur. Abnormal visual function is closely related to a series of functional eye diseases that affect visual quality, such as visual fatigue, progression of myopia, strabismus and amblyopia, and at the same time, there is a linkage relationship between accommodation and aggregation, which will have mutual influence. Insufficient accommodation results in blurred vision and accommodative lag (objects are imaged behind the retina). Studies have shown that there is a certain relationship between the progression of myopia and accommodation lag, and the accommodation lag increases with the increase of accommodation needs; accommodation lag can produce hyperopic retinal defocus, and imprecise adjustment makes the image on the retina blurred, and the retina is not produced. Adaptive changes in optics lead to continuous growth of the eye axis, which will lead to the development of myopia; long-term adjustment and insufficient compensation will increase the eye axis and form myopia.

Contents of the invention

The problem to be solved by the present invention is to provide a calculation method and application of functional spectacle lens parameters. People can play a very good role in preventing the occurrence of myopia.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: the calculation method of the parameters of the functional spectacle lens, including but not limited to the following three situations,

In the first case, calculate the value of the additional spherical lens required according to the actual adjustment ability and adjustment needs of the eye; including the following steps,

S1. Obtain the user's eye habit data and eye parameter data through inspection and monitoring equipment, including: eye distance L, unit: m; eye parameter data, including: adjustment ability A, unit: D;

S2. Calculate the adjustment demand AD of the short-distance eye according to the eye distance L, unit: D, calculation formula: AD=1/L;

S3. Setting the safety multiplier value M of the adjustment ability required for durable and comfortable eye use;

S4. Determine the degree of the required additional positive spherical mirror ADD, ADD'=max(0,(AD-A/M)), ADD is the degree value that can be fitted close to ADD';

In the second case, according to the actual collection ability and collection demand of the eye, the value of the additional prism required is calculated, including the following steps,

S1. Obtain the user's eye habit data and eye parameter data through inspection and monitoring equipment, including: eye distance L, unit: m; eye parameter data, including: pupil distance PD, unit: cm; collection ability C, Unit: △;

S2. Calculate the collection demand CD according to the eye distance L and pupil distance PD, unit: △, calculation formula: CD=PD/(L+X); where X is the distance from the eyeball rotation center to the distance measurement point;

S3. Determine the safety multiple value N of a collective capability;

S4. Determine the degree of the additional prism ADP needed, ADP is the prism degree value close to ADP', ADP'=max(0,(CD-C/N));

In the third case, according to the actual collection ability and collection demand of the eye, calculate the value of the additional spherical lens and prism required, including the following steps,

S1. Obtain the user's eye habit data and eye parameter data through inspection and monitoring equipment, including: eye distance L, unit: m; eye use time T; eye parameter data, including: pupil distance PD, unit: cm ;Adjustment ability A, unit: D; Aggregate ability C, unit: △; Ratio ACA of adjustment set and adjustment, unit: △/D;

S2. Calculate the adjustment demand AD for short-distance eyes according to the eye distance L, unit: D, calculation formula: AD=1/L; calculate the set demand CD according to the eye distance L and pupil distance PD, unit: △, calculate Formula: CD=PD/(L+X); where X is the distance from the center of eyeball rotation to the measuring point;

S3. Setting the safety multiplier value M of the adjustment ability required for long-term comfortable use of the eyes and the safety multiplier value N of the collective ability;

S4. Determine the degree of the required additional positive spherical mirror ADD, ADD'=max(0,(AD-A/M)), ADD is the degree value that can be fitted close to ADD';

S5. Calculate the adjusted collective compensation value CC of the spherical mirror, and the calculation formula is CC=ADD×ACA;

S6. Determine the degree of the additional prism ADP required by both eyes in total. ADP is the prism degree value that is close to ADP' and can be fitted. The calculation formula is: ADP'=max(0,(CD-(C-CC)/N ));

S7. The result of the final fitting, the additional functional degree is the superposition of ADD and ADP.

Further, in step S4 of the first and third cases, compare and check the obtained actual adjustment ability A and the adjustment demand AD value, if A<AD×M, reduce the adjustment demand by adding a positive spherical mirror, and adjust Demand reduced to at least A/M.

Further, in the second step S4, compare and check the obtained actual collection capacity C and collection demand CD value, if C<CD×N, reduce the adjustment demand through a prism, and reduce the adjustment demand to at least C/N .

In step S6 of the third case, compare and check the obtained actual collection capacity C and the collection demand CD value, if C<CD×N+CC, it is necessary to reduce the collection demand through an additional prism, and reduce the collection demand to at least (C -CC)/N.

Further, in the first case, the additional functional degree of the right eye is =ADDR; the additional functional degree of the left eye is =ADDL, ADDR=ADDL=ADD;

In the second case, the functional power added to the right eye is = ADPR; the functional power added to the left eye is = ADPL; ADPR + ADPL = ADP; the total functional power added to the right eye is = ADDR + ADPR; The total functional power added to the eye is = ADDL + ADPL; ADDR = ADDL = ADD; ADPR + ADPL = ADP.

The application of the calculation method of functional spectacle lens parameters, through the monitoring and inspection equipment to obtain the user's eye habits data and eye parameters, according to the eye habits data, calculate the visual function demand FD when using the eyes at close range; The value of the parameter obtains the actual ability value F of the user's visual function, and sets the safety factor value W required to maintain short-distance and long-lasting comfort with the eyes. When F<FD×W, the additional optical lens reduces the visual function requirement FD, and the optical lens The calculation method of the additional amount ADF is ADF=FD-F/W.

Further, use the calculation method of the lens parameters of the functional glasses to fit a pair of glasses with an additional functional degree.

Further, ADF can be the degree of the required additional positive spherical mirror ADD or the degree of the required additional prism mirror ADP;

FD can be adjustment demand AD or collective demand CD;

F can be adjustment ability A or collective ability C;

W may be a safety multiple value M of the adjustment ability required for long-term comfortable eye use or a safety multiple value N of a collective ability.

Further, wear it when using the eyes alone at close distances, and wear glasses for distance or not wearing glasses when not using the eyes at close distances; The additional degrees added below are the additional functional degrees.

Compared with the prior art, the present invention has the following advantages and positive effects.

1. In the present invention, for users whose adjustment power and gathering power are not enough to support the actual eye strength, and thus cannot use eyes comfortably at close range for a long time, by adding lenses on the basis of their distance optometry, such as positive spherical lenses and (or) Prism reduces the need for adjustment and collection required for short-distance eye use, so that the user's actual visual function capabilities such as adjustment ability and collection ability can support their habitual long-term eye use intensity, and can use eyes for long-term close-distance comfort;

2. The near-use glasses in the present invention are made according to personal characteristics, and the eye parameters and eye-use habits of the individual eyes will be considered, such as eye parameters such as adjustment ability and concentration ability; eye-use habits such as habitual working distance and eye-use intensity etc. In addition, considering factors such as the genetic risk of myopia, it can specifically solve the problem of personal eye comfort at close range, and at the same time effectively control the increase in the degree of myopia. For people who do not have myopia, it can play a very good role in preventing myopia. the effect that takes place;

3. This application also takes into account the comfort of using eyes at close range for a long time. On the basis of clarity, the purpose is to reduce the burden on eyes (such as reducing the adjustment ability and collection ability that glasses need to use). The fitting of light design is mainly aimed at the presbyopia group. Considering the sharpness of the eyes at close range, the main purpose is to see clearly. In addition, the fitting of traditional lighting generally does not consider the factor of aggregation force. This application takes into account comprehensively The combined effect of adjustment force and concentration force in the process of long-term close-distance comfortable eye use is to make long-term close-distance eye use more comfortable and durable, and reduce the occurrence and development of myopia. The final purpose and method are different from traditional ones. There is a big difference in the fitting of adding optics;

4. Long-term intense near-distance eye use is closely related to the formation of myopia. When wearing near-distance glasses at close range, it can reduce the need for adjustment during short-distance eye use and ensure the appropriate use of the adjustment function without causing The excessive tension of the eyes has a positive effect on preventing myopia and controlling the increase of myopia.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are relative orientations or positional relationships, which are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

Specific embodiments of the present invention will be described in detail below.

First, the following names are explained.

Accommodative range: the difference between the refractive power of the eye when looking at the far point and the near point.

Prism: A transparent object surrounded by two intersecting planes that are not parallel to each other, used to change the direction of light propagation.

Spherical Mirror: A mirror whose reflective surface is spherical. There are two types of concave spherical mirrors and convex spherical mirrors. A concave spherical mirror is also called a negative spherical mirror, which has the function of diverging light; a convex spherical mirror is also called a positive spherical mirror, which has the function of converging light.

Concentration: When looking at near objects, in addition to the adjustment function, the eyes must also turn inward at the same time, so that the visual axis can face the object. This effect is called concentration. The concentration ability can be measured by the prism degree △.

Accommodation: When the eyes are used at close range, the human eye increases the refractive power of the eye by changing the curvature of the lens so that close objects can still be imaged on the retina to keep the image clear. This effect is called accommodation.

The ratio of regulatory set to regulation: that is, the change of set (increase or decrease, in unit of prism degree △) caused by the change of regulation (increase or decrease, the unit is D). Under normal circumstances, when the regulation changes, the set will also change according to a certain ratio. This ratio varies from person to person, generally between 3-6. For example: Assuming a person has a ratio of accommodative set to accommodation of 4, then when accommodation increases by 1.0D, the accommodative set increases by 4△.

When the eyes focus on distant objects, the ciliary muscle relaxes, the surface of the lens is in a flat state, and at the same time, the concentration force required is small; when the eyes look at near objects, the ciliary muscle contracts, the suspensory ligament of the lens gradually relaxes, and the lens surface gradually convex At the same time, the collection is used to rotate both eyes to the nasal side at the same time. When looking at a closer object, the more accommodation and concentration of eye movements are required.

The premise of comfortable eye use is that both the adjustment power and the collection power can reach the standard of long-lasting close-range comfortable eyes (the ratio of adjustment power to adjustment demand reaches the safety multiple M, and the ratio of collection power to collection demand reaches the safety multiple N). If the adjustment power and (or) concentration power cannot reach the standard of continuous close-range comfortable use of eyes, it is necessary to add additional diopters to the lenses of the glasses to reduce the need for adjustment and concentration during close-range use of the eyes and reduce the burden on the eyes.

The spherical lens has the effect of changing the degree of light divergence and convergence. When looking at close-ups, placing a positive spherical lens in front of the eye can converge the light, thereby reducing the need for adjustment of the eyes. The degree to which a spherical lens diverges or converges light can also be measured by the refractive power, and the unit is D. When a positive spherical lens with +1.00D refractive power is added in front of the eyes, the accommodation power of the eyes can be reduced by 1.00D when looking at near places. The prism has the effect of changing the direction of light propagation. When the prism with the bottom facing outward is placed in front of the eyes, the position of the image of the object seen by the glasses will be moved like the temporal side, so that the angle between the sight lines of the two eyes will become smaller. The degree of convergence of the eyes towards the nose is reduced. For every 1△ of prisms facing outwards, the required gathering force will decrease by 1△, and the sum of the front prisms of the two eyes is the total reduced gathering force.

Each person's self-adjustment ability and concentration ability vary from person to person, and the distance used to use the eyes is also different, so the functional additional degree will also be different, so the functional additional degree is customized according to individual characteristics. Wear it while studying and working. It can specifically solve the problem of eye comfort at close range, thereby more effectively reducing visual fatigue and controlling the increase in the degree of myopia. For people who do not have myopia, it can also play a good role in preventing the occurrence of myopia.

The present invention is a calculation method of functional spectacle lens parameters, including but not limited to the following three situations. In the first situation, the value of the additional spherical lens required is calculated according to the actual adjustment ability and adjustment requirements of the eyes; in the second situation , calculate the value of the required additional prism according to the actual assembly ability and assembly demand of the eye; in the third case, calculate the required additional prism according to the actual adjustment and assembly isopykal function ability of the eye and the adjustment and assembly isopykal function requirements The value of additional functional lenses such as mirrors and prisms.

In the first case, calculate the value of the additional spherical lens required according to the actual adjustment ability and adjustment needs of the eye; including the following steps,

S1. Obtain the user's eye habit data and eye parameter data through inspection and monitoring equipment, including: eye distance L, unit: m; eye parameter data, including: adjustment ability A, unit: D;

S2. Calculate the adjustment demand AD of the short-distance eye according to the eye distance L, unit: D, calculation formula: AD=1/L;

S3. Setting the safety multiplier value M of the adjustment ability required for durable and comfortable eye use;

S4. Determine the power of the additional positive spherical mirror ADD, ADD'=max(0,(AD-A/M)), where ADD is a power value that is close to ADD' and can be fitted.

In the second case, according to the actual collection ability and collection demand of the eye, the value of the additional prism required is calculated, including the following steps,

S1. Obtain the user's eye habit data and eye parameter data through inspection and monitoring equipment, including: eye distance L, unit: m; eye parameter data, including: pupil distance PD, unit: cm; collection ability C, Unit: △;

S2. Calculate the collection demand CD according to the eye distance L and pupil distance PD, unit: △, calculation formula: CD=PD/(L+X); where X is the distance from the eyeball rotation center to the distance measurement point;

S3. Determine the safety multiple value N of a collective capability;

S4. Determine the power of the additional prism ADP, where ADP is a fitting prism value close to ADP', ADP'=max(0,(CD-C/N)).

In the third case, according to the actual collection ability and collection demand of the eye, calculate the value of the additional spherical lens and prism required, including the following steps,

S1. Obtain the user's eye habits data through inspection and monitoring equipment, including: eye distance L, unit: m; eye time length T; eye parameter data, including: pupil distance PD, unit: cm; adjustment ability A, Unit: D; Aggregate ability C, unit: △; Regulatory Aggregation and Adjustment Ratio ACA, unit: △/D and other parameters. According to the eye distance L, calculate the adjustment demand AD for short-distance eyes, unit: D, calculation formula: AD=1/L; calculate the collection demand CD according to the eye distance (L) and pupil distance (PD), unit: △, Calculation formula: CD=PD/(L+X), X is the distance from the center of eyeball rotation to the measurement point. For people who wear glasses, this distance is generally 0.020m-0.030m. For people who do not wear glasses, This distance is generally 0.010m-0.016m.

In this application, the existing mature equipment on the market can be used for the inspection and monitoring equipment, such as infrared monitoring equipment, laser detection equipment, and the combination of other detection equipment required for glasses on the market, can obtain the benefits of this application. The initial parameters can be calculated if the following parameters are satisfied. The measurement of the eye data mentioned above is the data that can be measured by mature equipment and methods on the market.

S2. Set a safety multiplier value M and a safety multiplier value N for the adjustment ability required for long-lasting and comfortable eye use, generally a value between 1-3; professionals need to use the eyes according to the user's habits , genetic factors, environmental factors, etc. to make a comprehensive judgment, the safety multiple value M of the adjustment ability and the safety multiple value N of the collection ability are a parameter for comfortable eye use. When the eye use time is relatively long, there are few outdoor activities, and the refractive development When the speed is too fast or there is a genetic risk related to myopia, the values of M and N are correspondingly higher. For example, a student in grade six of elementary school has a heavy workload, extracurricular classes on weekends, few outdoor activities, and his mother is highly myopic. My myopia is already 300 degrees. Set the M value and N value to 3.

S3. Compare and check the actual adjustment ability A and the adjustment demand AD value. If A<AD×M, it is necessary to reduce the adjustment demand through an additional positive spherical mirror, and reduce the adjustment demand to at least A/M. The additional positive spherical lens is required The calculation formula of the degree of mirror ADD is: ADD'=max(0,(AD-A/M)), max(A,B) represents, take the maximum value of A and B, and ADD is the verifiable value close to ADD' Matched degree value.

S4. Calculate the adjusted collective compensation value CC of the spherical mirror, and the calculation formula is CC=ADD×ACA;

S5. Compare and check the actual collection ability C and the collection demand CD value obtained. If C<CD×N+CC, it is necessary to reduce the collection demand through an additional prism, and reduce the collection demand to at least (C-CC)/N, and the total of both eyes The calculation formula for the power of the additional prism ADP is: ADP'=max(0,CD-((C-CC)/N)), and ADP is the prism power value close to ADP' that can be fitted.

S6. The additional functional degree of the final fitting on the basis of the hiking glasses is the superposition of ADD and ADP. Ultimately: the total functional power of the right eye is = ADDR + ADPR; the total functional power of the left eye is = ADDL + ADPL; in general: ADDR = ADDL = ADD; ADPR + ADPL = ADP, the additional power can be added Added to the prescription of the long-distance lens, professionals will make personalized adjustments based on the user's experience and feedback during the try-on to determine the prescription of the final glasses.

Use the calculation method of functional spectacle lens parameters to fit a spectacle with an additional functional degree, obtain the user's eye habit data and eye parameters through monitoring and inspection equipment, and calculate the near-distance eye use data based on the eye habit data. Visual function requirements FD; according to the value of the eye parameters, the actual ability value F of the user's visual function when using the eyes at close range is obtained, and the safety factor value W required to maintain the long-term comfortable use of the eyes at close range is set. When F<FD×W When the additional optical lens reduces the visual function requirement FD, the calculation method of the additional amount ADF of the optical lens is ADF=FD-F/W.

Preferably, ADF can be the degree of the required additional positive spherical mirror ADD or the required degree of the additional prism mirror ADP; FD can be the adjustment demand AD or the collection demand CD; F can be the adjustment ability A or the collection ability C; W It can be set as the safety factor value M of the adjustment ability required by the long-term comfortable use of the eyes or the safety factor value N of a collective ability.

The application of the calculation method of functional spectacle lens parameters can have a variety of application modes, for example, it can be worn alone when using the eyes at close range, and can be worn with distance glasses or without glasses when not using the eyes at close range; When using light mirrors, add light to the bottom and use additional functional degrees; when fitting gradient lenses, add additional degrees to the additional functional degrees, etc. By wearing this kind of functional glasses, the user's actual adjustment ability can be compared with what he is used to. The eye distance needs to match the adjustment force to ensure the comfort of short-distance eyes. It is suitable for the prevention and control of myopia, the relief of visual fatigue, and the improvement of the clarity and comfort of short-distance eyes.

Example 1:

The device monitors that when a person works at close range, the habitual eye distance is L=0.20m, and the adjustment power possessed by the person is A=10.0D. Professionals comprehensive judgment set M = 2.5.

According to the above measurement results, it can be concluded that: AD=1/L=5.00D; since AD×M=12.5D>A=10.0D; so this person needs to add ADD'=max(0,(AD-A/M ))=1.0D; when the minimum step size that can be fitted is 0.25D, 1.00D can be selected as the value of ADD; the additional value of the spherical lens in front of the left and right eyes is ADDR=ADDL=ADD=1.00D, and each eye needs to add + 1.00D.

Example two:

The equipment monitors that when a person works at close range, the habitual eye distance is L=0.15m. By measuring the collective power of this person is C=60△, the interpupillary distance is PD=60mm, ACA=4△/D, eyeball rotation The distance from the center to the measuring point X=0.027m. The comprehensive judgment of professionals sets N=2.

According to the above measurement results, it can be concluded that: CD=PD/(L+X)=33.90△. CD×M=67.80△>C=60△, so ADP’=CD-C/M=3.90△ needs to be added. When the prism step size that can be fitted is 1△, ADP=4.0△ can be set. When the same prism is added to the left and right eyes, ADPR=ADPL=1/2ADP=2△, and 2△ is added to the left and right eyes.

Example three:

The device monitors that when a person works at close range, the habitual eye distance is L=0.15m. By measuring the adjustment power possessed by this person is A=12.0D, the collective power is C=80△, and the interpupillary distance is PD=60mm. ACA＝4△/D, the distance X＝0.027m from the center of eyeball rotation to the measuring point. The comprehensive judgment of professionals sets M=2, N=2.

According to the above measurement results, it can be concluded that: AD=1/L=6.67D; CD=PD/(L+X)=33.90△. Since AD×M=13.34D>A=12.0D; so this person needs to add ADD'=max(0,(AD-A/M))=0.67D; when the minimum step size that can be fitted is 0.25D , 0.75D can be selected as the value of ADD; CC=ADD×ACA=3△; CD×N+CC=70.80△<C=80△, so no need to add prisms.

ADDR＝ADDL＝ADD＝0.75D, each eye needs to add +0.75D.

Example four:

The device monitors that a person’s habitual eye distance is L=0.15m when working at close range. By measuring the person’s adjustment power is A=14.0D, the collective power is C=60△, and the interpupillary distance is PD=60mm. ACA＝4△/D, the distance X＝0.027m from the center of eyeball rotation to the measuring point. The comprehensive judgment of professionals sets M=2, N=2.

According to the above measurement results, it can be concluded that: AD=1/L=6.67D; CD=PD/(L+X)=33.90△. Since AD×M=13.34D<A, this person does not need additional spherical lens; CC=ADD×ACA=0. CD×N+CC=67.80△>C=60△, so it is necessary to increase ADP'=CD-(C-CC)/M=3.90△, when the prism step size that can be fitted is 1△, ADP=4.0 can be set △.

When the same prism is added to the left and right eyes, ADPR=ADPL=1/2ADP=2△, and 2△ is added to the left and right eyes.

Example five:

The equipment monitors that a person’s habitual eye distance is L=0.15m when working at close range. By measuring the person’s adjustment power is A=11.0D, the collective power is C=60△, and the interpupillary distance is PD=60mm. ACA＝4△/D, the distance X＝0.027m from the center of eyeball rotation to the measuring point. The comprehensive judgment of professionals sets M=2, N=2.

According to the above measurement results, it can be concluded that: AD=1/L=6.67D; CD=PD/(L+X)=33.90△. Since AD×M=13.34D>A=11.0D; so this person needs to add ADD'=max(0,(AD-A/M))=1.17D; when the minimum step size that can be fitted is 0.25D , you can choose 1.25D as the value of ADD, ADDR＝ADDL＝1.25D; CC＝ADD×ACA＝5△; CD×N+CC＝72.80△＞C＝60△, so need to increase ADP'＝CD-(C -CC)/M=6.4△, when the fitting prism step size is 1△, ADP=6.0△ can be set, and when the left and right eyes are equipped with the same prism, ADPR=ADPL=1/2ADP=3△.

Each additional spherical lens 1.25D and prism 3△ are added to the left and right eyes.

An embodiment of the present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (3)

1. The method for calculating the lens parameters of functional spectacle, which is characterized in that: according to the actual collection ability and collection requirements of the eyes, the value of the required additional spherical lens and prism is calculated, including the following steps, S1. Obtain the user's eye habit data and eye parameter data through inspection and monitoring equipment, including: eye distance L, unit: m; eye use time T; eye parameter data, including: pupil distance PD, unit: cm ;Adjustment ability A, unit: D; Aggregate ability C, unit: △; Ratio ACA of adjustment set and adjustment, unit: △/D; S2. According to the eye distance L, calculate the adjustment demand AD of the short-distance eye, unit: D, calculation formula: AD=1/L; Calculate the collection demand CD according to the eye distance L and pupil distance PD, unit: △, calculation formula: CD=PD/(L+X); Where X is the distance from the center of eyeball rotation to the measurement point; S3. Setting the safety multiplier value M of the adjustment ability required for long-term comfortable use of the eyes and the safety multiplier value N of the collective ability; S4. Determine the power of the additional positive spherical mirror ADD, ADD'=max(0, (AD-A/M)), ADD is the degree value that is close to ADD' and can be fitted; S5. Calculate the adjusted collective compensation value CC of the spherical mirror, and the calculation formula is CC=ADD×ACA; S6. Determine the total degree of additional prism ADP required for both eyes. ADP is the prism value that is close to ADP' and can be fitted. The calculation formula is: ADP'= max (0,(CD-(C-CC)/N )); S7. The result of the final fitting, the additional functional degree is the superposition of ADD and ADP. 2. The calculation method of functional spectacle lens parameters according to claim 1, characterized in that: in step S4, compare and check the obtained actual adjustment ability A and adjustment demand AD value, if A<AD×M, pass Additional positive spherical mirrors reduce adjustment requirements, reducing adjustment requirements to at least A/M. 3. The calculation method of functional spectacle lens parameters according to claim 1, characterized in that: in step S6, compare and check the obtained actual collection capacity C and collection demand CD value, if C<CD×N+CC , needs to reduce the collection requirements by additional prisms to reduce the collection requirements to at least (C-CC)/N.