CN114967176B - Method and device for manufacturing orthokeratology lens based on cornea shape and refraction data - Google Patents
Method and device for manufacturing orthokeratology lens based on cornea shape and refraction data Download PDFInfo
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- CN114967176B CN114967176B CN202210670684.0A CN202210670684A CN114967176B CN 114967176 B CN114967176 B CN 114967176B CN 202210670684 A CN202210670684 A CN 202210670684A CN 114967176 B CN114967176 B CN 114967176B
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Abstract
The application relates to the technical field of ophthalmology, in particular to a method and a device for manufacturing a corneal plastic mirror based on corneal morphology and refractive data, wherein the method comprises the following steps: obtaining the eye problem of the user according to the refraction data, and obtaining an original curvature radius according to the corneal shape data; when the first eye problem is near vision, calculating to obtain a first curvature radius; when the second eye problem is presbyopia and/or astigmatism, respectively calculating to obtain presbyopia curvature radius, astigmatism curvature radius and direction parameters; manufacturing a first corneal plastic mirror based on each curvature radius and direction parameter; when the first eye problem is the distance vision, calculating to obtain a second curvature radius; when the second eye problem is presbyopia and/or astigmatism, respectively calculating to obtain presbyopia curvature radius, astigmatism curvature radius and direction parameters; and manufacturing a second orthokeratology lens based on the curvature radius and the direction parameters. Not only the correction of myopia or hyperopia, but also presbyopia and/or astigmatism is considered.
Description
Technical Field
The invention relates to the technical field of ophthalmology, in particular to a method and a device for manufacturing a corneal plastic mirror based on corneal morphology and refractive data.
Background
Orthokeratology is a special type of RGP lens. Conventional RGP lenses are used to correct vision, while shaping lenses are used to "reshape", i.e., to improve vision by changing the morphology of the corneal aggregates. RGP lenses of the "corrective" type, in which the inner surface is parallel to the surface of the cornea and fits into each other, adjust the lens power by changing the outer surface of the lens. In contrast, the "orthopedic" shaping mirror has a relatively simple outer surface and a relatively complex inner surface. The inner surface of the shaping mirror is no longer parallel to or coincident with the cornea, but rather some gaps are created between the lens and the cornea, which takes advantage of the tear action to achieve an "orthopedic" effect.
Most of traditional orthokeratology lenses are designed aiming at myopia correction, and myopia patients can generate myopia type peripheral defocus after wearing the orthokeratology lenses to control the increase of the eye axis, so that the orthokeratology lenses are mostly used for juvenile myopia correction and prevention and control.
However, when the same patient suffers from myopia or hyperopia, the eye problems associated with presbyopia and/or astigmatism may also be present, and thus, conventional orthokeratology lenses may not satisfy other eye problems that may exist in addition to myopia or hyperopia.
Disclosure of Invention
The embodiment of the invention provides a method and a device for manufacturing a plastic cornea mirror based on cornea shape and refraction data, which not only consider the correction problem of myopia or hyperopia, but also consider the correction problem of presbyopia and/or astigmatism when manufacturing the plastic cornea mirror.
The invention provides a method for manufacturing a corneal plastic mirror based on corneal morphology and refractive data, which comprises the following steps:
acquiring corneal shape data and refractive data of eyes of a user;
analyzing according to the refraction data to obtain eye problems of the user, wherein the eye problems comprise a first eye problem and a second eye problem, the first eye problem is myopia or hyperopia, and the second eye problem is presbyopia and/or astigmatism;
obtaining an original curvature radius of the anterior surface of the cornea according to the corneal morphology data;
when the first eye problem is myopia, determining the myopia ametropia correction required by the user, and calculating to obtain a first curvature radius according to the original curvature radius and the myopia ametropia correction;
when the second eye problem is presbyopia, determining the presbyopia correction amount required by the user, and calculating to obtain a presbyopia curvature radius according to the first curvature radius and the presbyopia correction amount;
and/or the presence of a gas in the gas,
when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction;
based on the first curvature radius, combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter to manufacture a first corneal plastic mirror;
when the first eye problem is hyperopia, determining the hyperopia ametropia correction required by the user, and calculating to obtain a second curvature radius according to the original curvature radius and the hyperopia ametropia correction;
when the second eye problem is presbyopia, determining the presbyopia correction required by the user, and calculating to obtain the presbyopia curvature radius according to the second curvature radius and the presbyopia correction;
and/or the presence of a gas in the gas,
when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction;
and manufacturing a second cornea shaping lens based on the second curvature radius and by combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter.
Optionally, in a preferred embodiment of the first aspect, the analyzing the refraction data to obtain the eye problem of the user includes:
analyzing according to the refractive data to obtain ametropia data and presbyopia refractive data;
analyzing the ametropia data to obtain a first eye problem, wherein the first eye problem is myopia or hypermetropia;
and analyzing the presbyopia refractive data to obtain a second eye problem, wherein the second eye problem is presbyopia and/or astigmatism.
Optionally, in a preferred embodiment of the first aspect, obtaining an original radius of curvature of the anterior surface of the cornea according to the corneal morphology data includes:
according to the corneal shape data, corneal curvature radiuses in two mutually perpendicular directions of the front surface of the cornea are obtained, and average calculation is carried out to obtain an average corneal curvature radius;
the mean corneal radius of curvature is taken as the original radius of curvature R of the anterior surface of the cornea.
Optionally, in a preferred embodiment of the first aspect, determining a myopic ametropia correction amount required by a user, and calculating a first curvature radius according to the original curvature radius and the myopic ametropia correction amount includes:
determining a user's desired myopic ametropia correction A1;
the first radius of curvature R1 is calculated according to the formula 1000 × (n-1)/R = (1000 × (n-1)/R1) + A1, where n is the refractive index of the cornea.
Optionally, in a preferred aspect of the first aspect, determining a presbyopia correction amount required by a user, and calculating a presbyopia curvature radius according to the first curvature radius and the presbyopia correction amount includes:
determining the presbyopia correction amount A2 required by the user;
the presbyopia radius of curvature R2 is calculated according to the formula (1000 × (n-1)/R2) + A2=1000 × (n-1)/R1, where n is the refractive index of the cornea.
Optionally, in a preferred embodiment of the first aspect, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction includes:
determining an astigmatism correction amount A3 and an astigmatism correction direction theta required by a user;
calculating an astigmatic radius of curvature R3 according to the formula (1000 × (n-1)/R) + A3=1000 × (n-1)/R3, where n is the refractive index of the cornea;
and determining a direction parameter alpha according to the astigmatism correction direction theta, wherein the direction parameter is the direction of the toroidal surface of the base arc area.
Optionally, in a preferred embodiment of the first aspect, when the first eye problem is myopia and the second eye problem is presbyopia,
the manufacturing method of the first cornea plastic mirror based on the first curvature radius, the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameters comprises the following steps:
presetting that a base arc area of a to-be-manufactured orthokeratology mirror is provided with at least two base arc areas;
taking the first curvature radius R1 as a manufacturing parameter of a first base arc region in the at least two base arc regions, and taking the presbyopia curvature radius R2 as a manufacturing parameter of a second base arc region in the at least two base arc regions;
and manufacturing to obtain the first cornea plastic mirror based on the manufacturing parameters of the first base arc area and the second base arc area.
Optionally, in a preferred embodiment of the first aspect, when the first eye problem is myopia and the second eye problem is astigmatism,
the manufacturing method of the first corneal plastic mirror based on the first curvature radius and combined with the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter comprises the following steps:
presetting a base arc area of a to-be-manufactured orthokeratology mirror to be provided with a ring curved surface and at least two base arc areas;
taking the first curvature radius R1 as a manufacturing parameter of a part of base arc regions in the at least two base arc regions;
taking the astigmatism curvature radius R3 and the direction parameter alpha as manufacturing parameters of a toroidal surface of the base arc area;
and manufacturing to obtain the first corneal plastic mirror based on the manufacturing parameters of part of the base arc regions in the at least two base arc regions and the manufacturing parameters of the annular curved surface of the base arc regions.
Optionally, in a preferred version of the first aspect, when the first ocular problem is myopia, the second ocular problem is presbyopia and astigmatism,
the manufacturing method of the first corneal plastic mirror based on the first curvature radius and combined with the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter comprises the following steps:
presetting a base arc area of a to-be-manufactured orthokeratology mirror to be provided with a ring curved surface and at least two base arc areas;
taking the first curvature radius R1 as a manufacturing parameter of a first base arc region in the at least two base arc regions, and taking the presbyopia curvature radius R2 as a manufacturing parameter of a second base arc region in the at least two base arc regions;
taking the astigmatism curvature radius R3 and the direction parameter alpha as manufacturing parameters of a toroidal surface of the base arc area;
and manufacturing to obtain the first corneal plastic mirror based on the manufacturing parameters of the first base arc area and the second base arc area and the manufacturing parameters of the annular curved surface of the base arc area.
In a second aspect, the present invention provides an apparatus for making a keratoplasty mirror based on corneal morphology and refractive data, comprising:
the data acquisition module is used for acquiring cornea form data and refraction data of eyes of a user;
the data processing module is used for analyzing and obtaining eye problems of the user according to the refraction data, wherein the eye problems comprise a first eye problem and a second eye problem, the first eye problem is short-sighted or long-sighted, and the second eye problem is long-sighted and/or astigmatic;
the data processing module is also used for obtaining the original curvature radius of the front surface of the cornea according to the corneal shape data;
the data processing module is further used for determining the myopic ametropia correction amount required by the user when the first eye problem is myopia, and calculating to obtain a first curvature radius according to the original curvature radius and the myopic ametropia correction amount;
the data processing module is further used for determining presbyopia correction required by a user when the second eye problem is presbyopia, and calculating a presbyopia curvature radius according to the first curvature radius and the presbyopia correction; and/or when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction;
the manufacturing module is used for manufacturing and obtaining a first corneal plastic mirror by combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter based on the first curvature radius;
the data processing module is further configured to determine a hyperopic ametropia correction amount required by a user when the first eye problem is hyperopia, and calculate a second curvature radius according to the original curvature radius and the hyperopic ametropia correction amount;
the data processing module is further used for determining presbyopia correction required by a user when the second eye problem is presbyopia, and calculating a presbyopia curvature radius according to the second curvature radius and the presbyopia correction; and/or when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining direction parameters according to the astigmatism correction direction;
the manufacturing module is further used for manufacturing a second orthokeratology lens based on the second curvature radius and combined with the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter.
In conclusion, corneal morphology data and refractive data of the eyes of the user are obtained; analyzing according to the refraction data to obtain eye problems of the user, wherein the eye problems comprise a first eye problem and a second eye problem, the first eye problem is myopia or hyperopia, and the second eye problem is presbyopia and/or astigmatism; obtaining an original curvature radius of the anterior surface of the cornea according to the corneal morphology data; when the first eye problem is myopia, determining the myopia ametropia correction required by the user, and calculating to obtain a first curvature radius according to the original curvature radius and the myopia ametropia correction; when the second eye problem is presbyopia, determining the presbyopia correction required by the user, and calculating to obtain the presbyopia curvature radius according to the first curvature radius and the presbyopia correction; and/or when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction; based on the first curvature radius, combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter to manufacture a first corneal plastic mirror; when the first eye problem is hyperopia, determining the hyperopia ametropia correction required by the user, and calculating to obtain a second curvature radius according to the original curvature radius and the hyperopia ametropia correction; when the second eye problem is presbyopia, determining the presbyopia correction required by the user, and calculating to obtain the presbyopia curvature radius according to the second curvature radius and the presbyopia correction; and/or when the second eye problem is astigmatism, determining the astigmatism correction amount and the astigmatism correction direction required by the user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction; and manufacturing a second cornea shaping mirror based on the second curvature radius and by combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameters. When the orthokeratology lens is manufactured, the correction problem of myopia or hyperopia is considered, and the correction problem of presbyopia and/or astigmatism is also considered.
Drawings
FIG. 1 is a schematic flow chart of a method for making a orthokeratology lens based on corneal topography and refractive data in an embodiment of the present invention;
FIG. 2 is a schematic view of an embodiment of the present invention having 4 base arc regions;
FIG. 3 is a schematic diagram of a base arc region having 2 base arc regions and a toroidal surface according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a keratoplasty mirror making device based on corneal morphology and refractive data in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
As shown in fig. 1, the embodiment of the present invention discloses a method for manufacturing a orthokeratology lens based on corneal morphology and refractive data, comprising:
101, obtaining corneal shape data and refraction data of eyes of a user;
wherein the orthokeratology mirror has an inner surface facing the user's cornea when worn, the inner surface including a centrally located base zone, the base zone being responsible for a therapeutic effect and being designed to correlate with the original shape and refractive condition of the user's cornea. The radius of curvature of the base curve is calculated from the original shape of the cornea (primarily the radius of curvature) and the amount of refractive correction required. Therefore, when the orthokeratology mirror is prepared for a user, the corneal shape data and the refractive data of the eye of the user are detected and obtained through devices such as a corneal detection instrument and a refractive detection instrument.
102, analyzing the refraction data to obtain the eye problem of the user;
the problem that whether ametropia and presbyopia exist in the eyes of a user can be determined by analyzing the refractive data, the ametropia problem mainly comprises myopia, hypermetropia and astigmatism, and because one eye cannot simultaneously generate myopia and hypermetropia, the first eye problem comprises myopia or hypermetropia, and the problem that presbyopia and/or astigmatism still exist when the myopia or hypermetropia exists is mainly solved.
103, obtaining the original curvature radius of the front surface of the cornea according to the corneal shape data;
the corneal curvature radius in two directions perpendicular to each other of the corneal anterior surface is extracted from the corneal shape data, an average corneal curvature radius is obtained by averaging, and the average corneal curvature radius is used as the original curvature radius R of the corneal anterior surface.
104, when the first eye problem is myopia, determining the myopic ametropia correction required by the user, and calculating to obtain a first curvature radius according to the original curvature radius and the myopic ametropia correction;
the principle of the refractive correction of the orthokeratology lens is that the orthokeratology lens is worn at night, and the front surface of the cornea is shaped into the shape of the basal arc area of the orthokeratology lens through wearing for a certain time, so that the refractive power of the cornea is changed, and the effect of the refractive correction is realized. If the base arc area of the orthokeratology mirror is flatter than the self flat axis curvature radius of the cornea, the orthokeratology mirror has the function of correcting myopia; if the base arc area of the orthokeratology mirror is made steeper than the flat axis curvature radius of the cornea, the orthokeratology mirror has the function of correcting hyperopia. When the first eye problem is myopia, determining the myopia ametropia correction amount required by the user, and calculating to obtain a first curvature radius according to the original curvature radius and the myopia ametropia correction amount;
when the curvature radius is calculated, according to the common conversion formula between the corneal curvature radius and the corneal diopter:
k =1000 × (n-1)/r, K being the diopter of the cornea in D, r being the radius of curvature of the anterior surface of the cornea in mm, and n being the refractive index of the cornea. For example, n may be 1.3375.
Determining a user desired myopic ametropia correction amount A1;
the first radius of curvature R1 is calculated according to the formula 1000 × (n-1)/R = (1000 × (n-1)/R1) + A1.
105, when the second eye problem is presbyopia, determining the presbyopia correction required by the user, and calculating to obtain the presbyopia curvature radius according to the first curvature radius and the presbyopia correction;
when the second eye problem is presbyopia, the presbyopia correction amount A2 required by the user is determined, and the presbyopia curvature radius R2 is calculated according to the first curvature radius R1 and the presbyopia correction amount A2 and a formula (1000 x (n-1)/R2) + A2=1000 x (n-1)/R1.
106, when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction;
when the second eye problem is astigmatism, determining an astigmatism correction amount A3 and an astigmatism correction direction θ required by a user, calculating an astigmatism radius of curvature R3 according to a formula (1000 × (n-1)/R) + A3=1000 × (n-1)/R3, and determining a direction parameter a according to the astigmatism correction direction θ, wherein the direction parameter a is a direction of the toric surface of the base arc area.
107, manufacturing a first corneal plastic mirror based on the first curvature radius and combined with the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter;
specifically, the different cases of the first eye problem and the second eye problem, the process of making the first orthokeratology mirror is described by the following three cases:
when the first eye problem is myopia and the second eye problem is presbyopia,
presetting that the base arc area of the orthokeratology mirror to be manufactured has at least two base arc areas, for example, as shown in fig. 2, the base arc area comprises four areas a, b, c and d, and the four areas a, b, c and d can be in any shape as required;
taking the first curvature radius as a manufacturing parameter of a first base arc region in the at least two base arc regions, and taking the second curvature radius as a manufacturing parameter of a second base arc region in the at least two base arc regions, for example, taking the first curvature radius R1 as a manufacturing parameter of the first base arc regions a and b, and taking the second curvature radius R2 as a manufacturing parameter of the second base arc region d, where c may be neither the first base arc region nor the second base arc region;
performing orthokeratology mirror manufacturing on the first base arc areas a and b and the second base arc area d according to manufacturing parameters (namely curvature radius), wherein a and b in the base arc area of the obtained first orthokeratology mirror are first curvature radius R1, and d in the base arc area is second curvature radius R2;
(II) when the first eye problem is myopia and the second eye problem is astigmatism,
presetting a base arc area of a to-be-manufactured orthokeratology mirror to be provided with a ring curved surface and at least two base arc areas, for example, as shown in fig. 3, the to-be-manufactured orthokeratology mirror comprises two base arc areas e and f, wherein the two areas e and f can be in any shapes as required, and the ring curved surface of the base arc area;
taking the first curvature radius R1 as a manufacturing parameter of a partial base arc region of the at least two base arc regions, and taking the astigmatism curvature radius R3 and the direction parameter a as a manufacturing parameter of a toroidal surface of the base arc region, for example, taking R1 as a manufacturing parameter of a base arc region e;
and manufacturing to obtain the first corneal plastic mirror based on the manufacturing parameters of the partial base arc areas in the at least two base arc areas and the manufacturing parameters of the annular surface of the base arc area, wherein e in the base arc area of the first corneal plastic mirror is a first curvature radius R1, the curvature radius of the annular surface of the base arc area is R3, and the direction parameter is alpha.
(III) when the first eye problem is myopia and the second eye problem is presbyopia and astigmatism,
presetting that a base arc area of a to-be-manufactured cornea shaping mirror has a ring curved surface and at least two base arc areas, taking a first curvature radius R1 as a manufacturing parameter of a first base arc area in the at least two base arc areas, taking a presbyopia curvature radius R2 as a manufacturing parameter of a second base arc area in the at least two base arc areas, taking an astigmatism curvature radius R3 and a direction parameter alpha as manufacturing parameters of the ring curved surface of the base arc area, and manufacturing to obtain the first cornea shaping mirror based on the manufacturing parameters of the first base arc area and the second base arc area and the manufacturing parameters of the ring curved surface of the base arc area.
It should be noted that, in the above descriptions (one), (two) and (three), the curvature radius and the direction parameter of the toric surface are only obtained in case of astigmatism, and the curvature radius and the direction parameter of the toric surface in the base arc zone are the original curvature radius and the original direction parameter in case of no astigmatism.
108, when the first eye problem is hyperopia, determining the hyperopic ametropia correction required by the user, and calculating to obtain a second curvature radius according to the original curvature radius and the hyperopic ametropia correction;
wherein, when the first eye problem is hyperopia, the user's desired amount of hyperopic ametropia correction B1 is determined, and a second radius of curvature R2 is calculated according to the formula (1000 x (n-1)/R) + B1=1000 x (n-1)/R2.
109, when the second eye problem is presbyopia, determining the presbyopia correction required by the user, and calculating to obtain the presbyopia curvature radius according to the second curvature radius and the presbyopia correction;
wherein, the presbyopia correction amount B2 required by the user is determined, and the presbyopia curvature radius r3 is calculated according to the formula (1000 x (n-1)/r 2) + B2=1000 x (n-1)/r 3.
110, when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction;
the specific content is as in step 106.
And 111, manufacturing a second cornea shaping lens by combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameters based on the second curvature radius.
The specific manufacturing process refers to the description in step 107.
In the embodiment of the invention, corneal shape data and refraction data of eyes of a user are acquired; analyzing according to the refraction data to obtain eye problems of the user, wherein the eye problems comprise a first eye problem and a second eye problem, the first eye problem is myopia or hyperopia, and the second eye problem is presbyopia and/or astigmatism; obtaining an original curvature radius of the front surface of the cornea according to the corneal morphology data; when the first eye problem is myopia, determining the myopia ametropia correction required by the user, and calculating to obtain a first curvature radius according to the original curvature radius and the myopia ametropia correction; when the second eye problem is presbyopia, determining the presbyopia correction required by the user, and calculating to obtain the presbyopia curvature radius according to the first curvature radius and the presbyopia correction; and/or when the second eye problem is astigmatism, determining the astigmatism correction amount and the astigmatism correction direction required by the user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction; based on the first curvature radius, combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter to manufacture a first corneal plastic mirror; when the first eye problem is hyperopia, determining the hyperopia ametropia correction amount required by the user, and calculating to obtain a second curvature radius according to the original curvature radius and the hyperopia ametropia correction amount; when the second eye problem is presbyopia, determining the presbyopia correction amount required by the user, and calculating to obtain the presbyopia curvature radius according to the second curvature radius and the presbyopia correction amount; and/or when the second eye problem is astigmatism, determining the astigmatism correction amount and the astigmatism correction direction required by the user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction; and manufacturing a second cornea shaping mirror based on the second curvature radius and by combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameters. When the orthokeratology lens is manufactured, the correction problem of myopia or hyperopia is considered, and the correction problem of presbyopia and/or astigmatism is also considered.
While the above embodiments have described the method for making a orthokeratology lens based on the corneal morphology and the refractive data, the following embodiments describe an orthokeratology lens making apparatus based on the corneal morphology and the refractive data, and as shown in fig. 4, the embodiments of the present invention provide an orthokeratology lens making apparatus based on the corneal morphology and the refractive data, including:
a data acquisition module 401, configured to acquire corneal morphology data and refractive data of an eye of a user;
the data processing module 402 is configured to analyze the refraction data to obtain eye problems of the user, where the eye problems include a first eye problem and a second eye problem, the first eye problem is myopia or hyperopia, and the second eye problem is presbyopia and/or astigmatism;
a data processing module 402, further configured to obtain an original radius of curvature of the anterior surface of the cornea according to the corneal morphology data;
the data processing module 402 is further configured to determine a myopic ametropia correction amount required by the user when the first eye problem is myopia, and calculate a first curvature radius according to the original curvature radius and the myopic ametropia correction amount; when the second eye problem is presbyopia, determining the presbyopia correction amount required by the user, and calculating to obtain the presbyopia curvature radius according to the first curvature radius and the presbyopia correction amount; and/or when the second eye problem is astigmatism, determining the astigmatism correction amount and the astigmatism correction direction required by the user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction;
the manufacturing module 403 is configured to manufacture a first corneal plastic mirror by combining a presbyopia curvature radius and/or an astigmatism curvature radius and a direction parameter based on the first curvature radius;
the data processing module 402 is further configured to determine a presbyopia correction amount required by the user when the second eye problem is presbyopia, and calculate a presbyopia curvature radius according to the second curvature radius and the presbyopia correction amount; and/or when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction;
the manufacturing module 403 is further configured to manufacture a second orthokeratology lens based on the second curvature radius, in combination with the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter.
In the embodiment of the present invention, the data acquisition module 401 acquires corneal morphology data and refractive data of the eyes of the user; the data processing module 402 analyzes the refractive data to obtain eye problems of the user, wherein the eye problems include a first eye problem and a second eye problem, the first eye problem is myopia or hyperopia, and the second eye problem is presbyopia and/or astigmatism; obtaining an original curvature radius of the anterior surface of the cornea according to the corneal morphology data; when the first eye problem is myopia, determining the myopia ametropia correction required by the user, and calculating to obtain a first curvature radius according to the original curvature radius and the myopia ametropia correction; when the second eye problem is presbyopia, determining the presbyopia correction amount required by the user, and calculating to obtain the presbyopia curvature radius according to the first curvature radius and the presbyopia correction amount; and/or when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction; the manufacturing module 403 is used for manufacturing a first corneal plastic mirror by combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter based on the first curvature radius; when the first eye problem is hyperopia, the data processing module 402 determines the hyperopic ametropia correction required by the user, and calculates a second curvature radius according to the original curvature radius and the hyperopic ametropia correction; when the second eye problem is presbyopia, determining the presbyopia correction amount required by the user, and calculating to obtain the presbyopia curvature radius according to the second curvature radius and the presbyopia correction amount; and/or when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by a user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction; the manufacturing module 403 manufactures a second orthokeratology lens based on the second curvature radius, and by combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter. When the orthokeratology lens is manufactured, the correction problem of myopia or hyperopia is considered, and the correction problem of presbyopia and/or astigmatism is also considered.
Claims (3)
1. A method for manufacturing a corneal plastic mirror based on corneal morphology and refractive data is characterized by comprising the following steps:
the method comprises the steps of obtaining cornea form data and refraction data of eyes of a user;
analyzing according to the refraction data to obtain eye problems of the user, wherein the eye problems comprise a first eye problem and a second eye problem, the first eye problem is myopia or hyperopia, and the second eye problem is presbyopia and/or astigmatism;
according to the corneal shape data, corneal curvature radiuses in two mutually perpendicular directions of the front surface of the cornea are obtained, and average calculation is carried out to obtain an average corneal curvature radius;
taking the average corneal radius of curvature as an original radius of curvature R of the anterior surface of the cornea;
judging a first eye problem, adopting a first flow when the first eye problem is near vision, and adopting a second flow when the first eye problem is near vision;
the first process is specifically:
determining a myopic ametropia correction amount A1 required by the user when the first eye problem is myopia; calculating a first radius of curvature R1 according to the formula 1000 × (n-1)/R = (1000 × (n-1)/R1) + A1, where n is the refractive index of the cornea;
then judging a second eye problem;
when the second eye problem is presbyopia, determining the presbyopia correction amount A2 required by the user; calculating a presbyopic curvature radius R2 according to a formula (1000 x (n-1)/R2) + A2=1000 x (n-1)/R1;
when the second eye problem is astigmatism, determining an astigmatism correction amount A3 and an astigmatism correction direction theta required by the user; calculating to obtain an astigmatism curvature radius R3 according to a formula (1000 x (n-1)/R) + A3=1000 x (n-1)/R3, and determining a direction parameter alpha according to the astigmatism correction direction theta, wherein the direction parameter is the direction of the toroidal surface of the base arc area;
when the second eye problem is presbyopia and astigmatism, determining a presbyopia correction amount A2 required by the user; calculating a presbyopic curvature radius R2 according to a formula (1000 x (n-1)/R2) + A2=1000 x (n-1)/R1; determining an astigmatism correction amount A3 and an astigmatism correction direction theta required by the user; calculating to obtain an astigmatism curvature radius R3 according to a formula (1000 x (n-1)/R) + A3=1000 x (n-1)/R3, and determining a direction parameter alpha according to the astigmatism correction direction theta, wherein the direction parameter is the direction of the toroidal surface of the base arc area;
then, based on the first curvature radius, combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameters to manufacture a first corneal plastic mirror;
the second process is specifically:
when the first eye problem is hyperopia, determining a hyperopia ametropia correction amount required by the user, and calculating to obtain a second curvature radius according to the original curvature radius and the hyperopia ametropia correction amount;
then judging a second eye problem;
when the second eye problem is presbyopia, determining the presbyopia correction required by the user, and calculating to obtain the presbyopia curvature radius according to the second curvature radius and the presbyopia correction;
when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by the user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining a direction parameter according to the astigmatism correction direction;
when the second eye problem is presbyopia and astigmatism, determining the presbyopia correction required by the user, and calculating to obtain a presbyopia curvature radius according to the second curvature radius and the presbyopia correction; determining an astigmatism correction amount and an astigmatism correction direction required by the user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining direction parameters according to the astigmatism correction direction;
then, based on the second curvature radius, combining the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter to manufacture a second cornea shaping mirror;
in the first process, the first cornea plastic mirror is manufactured by selecting a first manufacturing process, a second manufacturing process and a third manufacturing process according to the second eye problem, and the manufacturing process specifically comprises the following steps:
a first manufacturing process:
when first eye problem is myopia, when second eye problem is the presbyopia, based on first radius of curvature, combine presbyopia radius of curvature, the preparation obtains first cornea plastic mirror, includes:
presetting that a base arc area of a to-be-manufactured orthokeratology mirror is provided with at least two base arc areas;
taking the first curvature radius R1 as a manufacturing parameter of a first base arc region in the at least two base arc regions, and taking the presbyopia curvature radius R2 as a manufacturing parameter of a second base arc region in the at least two base arc regions;
manufacturing to obtain a first corneal plastic mirror based on the manufacturing parameters of the first base arc region and the second base arc region;
the second manufacturing process comprises the following steps:
when the first eye problem is myopia, the second eye problem is astigmatism, based on the first curvature radius, the astigmatism curvature radius and the direction parameter are combined, and a first corneal plastic mirror is manufactured and obtained, wherein the method comprises the following steps:
presetting a base arc area of a to-be-manufactured orthokeratology mirror to be provided with a ring curved surface and at least two base arc areas;
taking the first curvature radius R1 as a manufacturing parameter of a part of base arc regions in the at least two base arc regions;
taking the astigmatism curvature radius R3 and the direction parameter alpha as manufacturing parameters of a toroidal surface of the base arc area;
manufacturing to obtain a first corneal plastic mirror based on manufacturing parameters of part of the base arc regions in the at least two base arc regions and manufacturing parameters of the annular curved surface of the base arc regions;
the third manufacturing process comprises the following steps:
when first eye problem is near-sighted, second eye problem is presbyopia and astigmatism, based on first curvature radius, combine presbyopia curvature radius with astigmatism curvature radius reaches the direction parameter, the preparation obtains first cornea plastic mirror, includes:
presetting a base arc area of a to-be-manufactured orthokeratology mirror to be provided with a ring curved surface and at least two base arc areas;
taking the first curvature radius R1 as a manufacturing parameter of a first base arc region in the at least two base arc regions, and taking the presbyopia curvature radius R2 as a manufacturing parameter of a second base arc region in the at least two base arc regions;
taking the astigmatism curvature radius R3 and the direction parameter alpha as manufacturing parameters of a toroidal surface of the base arc area;
and manufacturing to obtain the first corneal plastic mirror based on the manufacturing parameters of the first base arc area and the second base arc area and the manufacturing parameters of the annular curved surface of the base arc area.
2. A method for making a orthokeratology lens based on corneal morphology and refractive data as claimed in claim 1, wherein said analyzing the refractive data to obtain the user's eye problems comprises:
analyzing according to the refractive data to obtain ametropia data and presbyopia refractive data;
analyzing according to the ametropia data to obtain a first eye problem, wherein the first eye problem is myopia or hypermetropia;
and analyzing the presbyopia refractive data to obtain a second eye problem, wherein the second eye problem is presbyopia and/or astigmatism.
3. A device for making a orthokeratology lens based on corneal morphology and refractive data, comprising:
the data acquisition module is used for acquiring cornea form data and refraction data of eyes of a user;
the data processing module is used for analyzing and obtaining the eye problems of the user according to the refraction data, wherein the eye problems comprise a first eye problem and a second eye problem, the first eye problem is short-sighted or long-sighted, and the second eye problem is long-sighted and/or astigmatic;
the data processing module is further used for obtaining the corneal curvature radiuses in two mutually perpendicular directions of the front surface of the cornea according to the corneal shape data, and carrying out average calculation to obtain an average corneal curvature radius; taking the average corneal radius of curvature as an original radius of curvature R of the anterior surface of the cornea;
the data processing module is further used for selecting and processing a first flow and a second flow according to the first eye problem;
the first process is specifically:
determining the myopic ametropia correction amount A1 required by the user when the first eye problem is near vision; calculating a first radius of curvature R1 according to the formula 1000 × (n-1)/R = (1000 × (n-1)/R1) + A1, where n is the refractive index of the cornea;
then judging a second eye problem;
when the second eye problem is presbyopia, determining a presbyopia correction amount A2 required by the user; calculating a presbyopic curvature radius R2 according to a formula (1000 x (n-1)/R2) + A2=1000 x (n-1)/R1;
determining an astigmatism correction amount A3 and an astigmatism correction direction θ required by the user when the second eye problem is astigmatism; calculating to obtain an astigmatism curvature radius R3 according to a formula (1000 x (n-1)/R) + A3=1000 x (n-1)/R3, and determining a direction parameter alpha according to the astigmatism correction direction theta, wherein the direction parameter is the direction of the toroidal surface of the base arc area;
determining a presbyopic correction A2 required by the user when the second eye problem is presbyopia and astigmatism; calculating the presbyopia curvature radius R2 according to the formula (1000 x (n-1)/R2) + A2=1000 x (n-1)/R1; determining the astigmatism correction amount A3 and the astigmatism correction direction theta required by the user; calculating to obtain an astigmatism curvature radius R3 according to a formula (1000 x (n-1)/R) + A3=1000 x (n-1)/R3, and determining a direction parameter alpha according to the astigmatism correction direction theta, wherein the direction parameter is the direction of the toroidal surface of the base arc area;
the second process specifically comprises the following steps:
when the first eye problem is far vision, determining the far vision ametropia correction required by the user, and calculating to obtain a second curvature radius according to the original curvature radius and the far vision ametropia correction;
then judging a second eye problem;
when the second eye problem is presbyopia, determining the presbyopia correction required by the user, and calculating to obtain the presbyopia curvature radius according to the second curvature radius and the presbyopia correction;
when the second eye problem is astigmatism, determining an astigmatism correction amount and an astigmatism correction direction required by the user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining direction parameters according to the astigmatism correction direction;
when the second eye problem is presbyopia and astigmatism, determining the presbyopia correction amount required by the user, and calculating to obtain a presbyopia curvature radius according to the second curvature radius and the presbyopia correction amount; determining an astigmatism correction amount and an astigmatism correction direction required by the user, calculating to obtain an astigmatism curvature radius according to the original curvature radius and the astigmatism correction amount, and determining direction parameters according to the astigmatism correction direction;
the manufacturing module is used for selecting and executing a first manufacturing flow, a second manufacturing flow and a third manufacturing flow based on the first curvature radius;
the first manufacturing process specifically comprises the following steps:
when the first eye problem is myopia and the second eye problem is presbyopia, presetting that a base arc area of the orthokeratology mirror to be manufactured is provided with at least two base arc areas; taking the first curvature radius R1 as a manufacturing parameter of a first base arc region in the at least two base arc regions, and taking the presbyopia curvature radius R2 as a manufacturing parameter of a second base arc region in the at least two base arc regions; manufacturing to obtain a first corneal plastic mirror based on the manufacturing parameters of the first base arc region and the second base arc region;
the second manufacturing process specifically comprises the following steps:
when the first eye problem is myopia and the second eye problem is astigmatism, presetting a base arc area of a keratoplasty mirror to be manufactured to be provided with a ring curved surface and at least two base arc areas; taking the first curvature radius R1 as a manufacturing parameter of a part of base arc area in the at least two base arc areas; taking the astigmatism curvature radius R3 and the direction parameter alpha as manufacturing parameters of a toroidal surface of the base arc area; manufacturing to obtain a first corneal plastic mirror based on manufacturing parameters of part of the base arc regions in the at least two base arc regions and manufacturing parameters of the annular curved surface of the base arc regions;
the third manufacturing process specifically comprises the following steps:
when the first eye problem is myopia and the second eye problem is presbyopia and astigmatism, presetting that a base arc area of the orthokeratology lens to be manufactured is provided with a ring curved surface and at least two base arc areas; taking the first curvature radius R1 as a manufacturing parameter of a first base arc region in the at least two base arc regions, and taking the presbyopia curvature radius R2 as a manufacturing parameter of a second base arc region in the at least two base arc regions; taking the astigmatism curvature radius R3 and the direction parameter alpha as manufacturing parameters of a toroidal surface of the base arc area; manufacturing to obtain a first corneal plastic mirror based on the manufacturing parameters of the first base arc region and the second base arc region and the manufacturing parameters of the annular curved surface of the base arc region;
the manufacturing module is further used for manufacturing a second orthokeratology lens based on the second curvature radius and combined with the presbyopia curvature radius and/or the astigmatism curvature radius and the direction parameter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210670684.0A CN114967176B (en) | 2022-06-15 | 2022-06-15 | Method and device for manufacturing orthokeratology lens based on cornea shape and refraction data |
| PCT/CN2022/100939 WO2023240675A1 (en) | 2022-06-15 | 2022-06-24 | Orthokeratology lens manufacturing method and apparatus based on corneal morphology and refractive data |
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| CN202210670684.0A CN114967176B (en) | 2022-06-15 | 2022-06-15 | Method and device for manufacturing orthokeratology lens based on cornea shape and refraction data |
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| WO2008014544A1 (en) * | 2006-07-31 | 2008-02-07 | The Institute For Eye Research | Corneal and epithelial remodelling |
| SG11201811620WA (en) * | 2016-06-30 | 2019-01-30 | Mitsui Medical Commerce Co Ltd | Orthokeratology lens designating method, designating system, designating and supplying method, and designating and supplying system |
| CN206757221U (en) * | 2017-05-15 | 2017-12-15 | 王江桥 | A kind of Ortho-K for being used to correct long sight and presbyopia |
| CN108008544B (en) * | 2017-12-06 | 2020-05-12 | 爱博诺德(北京)医疗科技股份有限公司 | Method for manufacturing orthokeratology mirror |
| CN107728338B (en) * | 2017-12-06 | 2024-01-26 | 爱博诺德(北京)医疗科技股份有限公司 | Cornea shaping mirror |
| CN112684611A (en) * | 2019-10-17 | 2021-04-20 | 爱博诺德(北京)医疗科技股份有限公司 | Corneal plastic mirror design method, manufacturing method and corneal plastic mirror |
| CN113806908A (en) * | 2021-08-04 | 2021-12-17 | 美视(杭州)人工智能科技有限公司 | Parameter processing method based on cornea shaping lens fitting and related equipment |
| CN114239208A (en) * | 2021-08-04 | 2022-03-25 | 美视(杭州)人工智能科技有限公司 | Data processing method based on cornea shaping lens fitting and related equipment |
| CN114545659A (en) * | 2022-03-03 | 2022-05-27 | 上海艾康特医疗科技有限公司 | Corneal contact lens and design method thereof |
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