CN108681100B - Method for manufacturing cornea shaping mirror - Google Patents
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- CN108681100B CN108681100B CN201810485316.2A CN201810485316A CN108681100B CN 108681100 B CN108681100 B CN 108681100B CN 201810485316 A CN201810485316 A CN 201810485316A CN 108681100 B CN108681100 B CN 108681100B
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/024—Methods of designing ophthalmic lenses
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/024—Methods of designing ophthalmic lenses
- G02C7/027—Methods of designing ophthalmic lenses considering wearer's parameters
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/024—Methods of designing ophthalmic lenses
- G02C7/028—Special mathematical design techniques
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
- G02C7/047—Contact lens fitting; Contact lenses for orthokeratology; Contact lenses for specially shaped corneae
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Abstract
The invention discloses a manufacturing method of a corneal plastic mirror, in the technical scheme provided by the invention, the coordinates of each arc section of the inner surface of the corneal plastic mirror are obtained by establishing a corneal model formula, and each arc section of the inner surface of the corneal plastic mirror is determined by combining the relation between the integral areas of the cross sections of tear films in each arc area and the points on the corresponding arc sections, so that the more accurate parabola-like actual shape of a cornea is combined in the design of the corneal plastic mirror, and the design has the capability of more accurately correcting ametropia by setting higher model resolution ratio; and by utilizing the design of the tear film, the volume of the tear storage space becomes more stable by controlling the integral area of the cross section of the tear film in each arc area, thereby ensuring the stability of the shaping effect of the corneal shaping mirror and simultaneously improving the central positioning performance of the corneal shaping mirror.
Description
Technical Field
The invention relates to the technical field of a cornea shaping mirror for correcting the eyesight of eyes, in particular to a manufacturing method of the cornea shaping mirror.
Background
Orthokeratology (Ortho-K) is a technique which actively, stepwise, gradually and scientifically changes the overall shape of the cornea through a specially designed Orthokeratology lens so as to quickly improve the naked eye vision and control the development of myopia of teenagers.
Modern orthokeratology lenses use the design principle of 'reversed geometry', the shape of the inner surface of the orthokeratology lens is designed to be opposite to the geometry of the front surface of the cornea, gaps are formed between the lens and the cornea, and the 'reshaping' effect is achieved by utilizing the mechanical action of tears. The cornea shaping mirror is a hard contact mirror, a layer of uniformly distributed tear film is clamped between the inner surface of the mirror and the outer surface of the cornea after the mirror is worn, and the epithelial cells in the center of the cornea are pulled to the middle periphery (periphery) by the hydrodynamic effect of the tear; meanwhile, when eyes close and blink, the action of the eyelids causes the center of the lens to exert certain pressure on the lower cornea. These two effects result in flattening of the central corneal curvature, thinning of the central epithelial layer, thickening of the mid-periphery, and movement of the object-imaging point closer to the retina. After the contact lens is worn for a period of time, the shape of the front surface of the cornea tends to be consistent with that of the back surface of the orthokeratology lens, and when the rigid air-permeable contact lens for orthokeratology is removed, the cornea still keeps the shape of the back surface of the orthokeratology lens, so that the myopia degree is reduced or even eliminated.
The existing manufacturing method of the orthokeratology lens generally divides the orthokeratology lens into four arc areas, and the orthokeratology lens is designed according to the requirements of the shape and diopter of the cornea of a patient aiming at two variables of curvature radius and width of the four arc areas. Referring to fig. 2, the inner surface of the orthokeratology mirror 100 is sequentially provided with a base arc area 1, a reverse arc area 2, an adaptation arc area 3 and a side arc area 4 from the center to the outside, the base arc area 1 contacts the central area of the cornea 200 of the human eye, the surface shape is flat and is used for flattening the surface of the cornea 200, the reverse arc area 2 is steep and is used for stabilizing the flattening effect of the base arc area 1 and ensuring a certain tear storage amount, the adaptation arc area 3 can also be called as a positioning arc area and is mainly used for stabilizing the orthokeratology mirror 100, and the side arc area 4 ensures the circulation of tears around the cornea 200 and the orthokeratology mirror 100 so as to form a tear film 201. However, the prior art methods for manufacturing orthokeratology lenses have major drawbacks and disadvantages: 1. the volume of a tear storage space is easy to be unstable, the shaping effect of the orthokeratology lens with different reduction degrees is also unstable, and the treatment effect is reduced; 2. the central positioning performance of the orthokeratology lens is poor.
Disclosure of Invention
The invention mainly aims to provide a manufacturing method of a corneal plastic mirror, aiming at solving the problems that the existing manufacturing method of the corneal plastic mirror easily causes unstable tear storage space capacity and poorer central positioning performance of the corneal plastic mirror.
In order to achieve the above purpose, the present invention provides a method for manufacturing a keratoplasty mirror, wherein a base arc region including a base arc segment, a reversal arc region including a reversal arc segment, an adaptation arc region including an adaptation arc segment, and a side arc region including a side arc segment are sequentially arranged on an inner surface of the keratoplasty mirror from a center to an outside, a tear film is formed between the inner surface of the keratoplasty mirror and a cornea, wherein an integral area of a cross section of the tear film in the base arc region is SBCWhat is, what isThe integral area of the cross section of the tear film in the region of the reverse arc region is SRCThe integral area of the cross section of the tear film in the adaptive arc area is SACThe integral area of the cross section of the tear film in the arc area is SPCThe manufacturing method of the orthokeratology mirror comprises the following steps:
s10: measurement of corneal curvature K and ametropia R within a specific range of the corneaxAnd corneal eccentricity e, where K is at an interval of 0.05, RxCalculating a corneal curvature radius value R from K with 0.05D as an interval and e with 0.01 as an interval;
s20: establishing a formula of the corneal height Z with the corneal vertex as an origin and the distance from the origin as x
And calculating the expected corneal rise change of the user by the Munnerlyn formula
Obtaining an actual vector height change quantity m delta Z through correction of a coefficient m, wherein D is the diameter of a corneal optical zone, and n is the refractive index of the cornea;
s30: according to the vertex (0, -m delta Z) of the base arc segment and two end points (x) on the diameter of the cornea optical zone1，Z(x1) And (x)2，Z(x2) Calculating the radius of curvature of the base arc segment and calculating SBC；
S40: in the adaptive arc area, different amplification amounts are carried out on a point on the cornea in the normal direction, the horizontal direction or the vertical direction of the point to obtain the coordinate (x plus delta x) of the point on the adaptive arc section1，Z(x+△x1)+△Z1) To form the gathering, fitting or flattening effect of the adaptive arc area on the cornea, at least three arbitrary points on the adaptive arc section are taken to determine the adaptive arc section, and S is calculatedAC；
S50: according to
Determination of SRCIn aIn the reversal arc area, the point on the cornea is zoomed in the normal direction, horizontal direction or vertical direction of the point to obtain the coordinate (x + delta x) of the point on the reversal arc section2，Z(x+△x2)+△Z2) According to at least any point on the arc segment of the reverse arc and SRCTo determine the reverse arc segment;
s60: according to
Determination of SPCIn the side arc area, the point on the cornea is magnified in the normal direction, horizontal direction or vertical direction of the point to obtain the coordinate (x + delta x) of the point on the side arc section3，Z(x+△x3)+△Z3) According to at least any two points on the side arc segment and SPCTo determine the side arc segment.
Preferably, in the step S20, 0.5. ltoreq. m.ltoreq.3.
Preferably, 1. ltoreq. m.ltoreq.2.
Preferably, the adaptive arc segments are arranged in 1 to 3 arc lines.
Preferably, in the step S40,
specifically a proportional relationship or a linear superposition relationship.
Preferably, in the step S60,
specifically a proportional relationship or a linear superposition relationship.
In the technical scheme provided by the invention, the coordinates of each arc section of the inner surface of the corneal shaping mirror are obtained by establishing a corneal model formula, and each arc section of the inner surface of the corneal shaping mirror is determined by combining the relation between the integral areas of the cross sections of the tear film in each arc area and the points on the corresponding arc section, so that the more accurate parabola-like actual shape of the cornea is combined in the design of the corneal shaping mirror, and the higher model resolution setting is considered, so that the design has the capability of more accurately correcting the ametropia; and by utilizing the design of the tear film, the volume of the tear storage space becomes more stable by controlling the integral area of the cross section of the tear film in each arc area, thereby ensuring the stability of the shaping effect of the corneal shaping mirror and simultaneously improving the central positioning performance of the corneal shaping mirror.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a method for manufacturing a orthokeratology mirror according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a keratoplasty mirror obtained by the design method of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Cornea shaping mirror | 4 | Side arc area |
| 1 | |
200 | Cornea |
| 2 | |
201 | Tear film |
| 3 | Adaptive arc zone |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 is a diagram illustrating an embodiment of a method for manufacturing a orthokeratology mirror according to the present invention.
Referring to fig. 2, the orthokeratology mirror 100 has an inner surface facing a cornea 200, the inner surface of the orthokeratology mirror 100 is sequentially provided with a base arc region 1 including a base arc segment, an inversion arc region 2 including an inversion arc segment, an adaptation arc region 3 including an adaptation arc segment, and a side arc region 4 including a side arc segment from the center to the outside, a tear film 201 is formed between the inner surface of the orthokeratology mirror 100 and the cornea 200, wherein an integral area of a cross section of the tear film 201 in the base arc region 1 is SBCThe integral area of the cross section of the tear film 201 in the region of the inversion arc region 2 is SRCThe integral area of the cross section of the tear film 201 in the region of the adaptive arc region 3 is SACThe integral area of the cross section of the tear film 201 in the region of the side arc region 4 is SPC。
Referring to fig. 1, in the present embodiment, the method for manufacturing the orthokeratology mirror includes the following steps:
step S10, measuring corneal curvature K and ametropia R within a specific range of corneaxAnd corneal eccentricity e, where K is at an interval of 0.05, RxAt an interval of 0.05D, e at an interval of 0.01, and calculating the corneal curvature radius value R from K.
Before each arc zone design of the orthokeratology lens is carried out, the corneal curvature K and the ametropia R within a specific range of the cornea of a user need to be measuredxAnd the corneal eccentricity e,in the existing manufacturing method of the orthokeratology lens, K is usually 0.25 as an interval, and when the value of the corneal eccentricity e is fixed, every time K is increased by 0.25, the corresponding increase of the corneal vector height variable Delta Z is 5-6 mu m. However, by the Munnerlyn formula
The calculation shows that the cutting depth is increased by about 1 to 2 μm within the diameter range of the cornea optical zone of 6.2mm when the myopia degree is increased by 10 degrees. Therefore, the precision specification of the orthokeratology lens obtained by the existing manufacturing method of the orthokeratology lens is difficult to meet the requirement for accurately controlling the myopia degree of a user, so in the embodiment, K takes 0.05 as an interval, and the specification and the model of the orthokeratology lens obtained by the design method can meet the requirement for accurately controlling the myopia degree. In the same regard, in the present embodiment, RxAt an interval of 0.05D, e at an interval of 0.01. After the corneal curvature K is measured, the corneal curvature radius value R can be obtained by conversion using an existing formula.
Step S20, establishing a formula of corneal height Z with the corneal vertex as the origin and the distance from the origin as x
And calculating the expected corneal rise change of the user by the Munnerlyn formula
And obtaining the actual vector height change quantity m delta Z by correcting the coefficient m, wherein D is the diameter of the corneal optical zone, and n is the refractive index of the cornea.
Considering that the actual cornea surface is irregular, in order to facilitate the subsequent design of the corneal plastic mirror and simulate the actual surface shape of the cornea as much as possible, establishing a cornea model formula Z (x), and after establishing the cornea model formula and obtaining the expected corneal rise change quantity delta Z, obtaining the actual rise change quantity m delta Z through the correction of a coefficient m, wherein m is more than or equal to 0.5 and less than or equal to 3 (further, m is more than or equal to 1 and less than or equal to 2).
Step S30, according to the top of the base arc segmentPoint (0, -m Δ Z) and two endpoints (x) on the diameter of the optical zone of the cornea1，Z(x1) And (x)2，Z(x2) Calculating the radius of curvature of the base arc segment and calculating SBC。
After the actual rise change quantity m delta Z is obtained, the coordinates (0, -m delta Z) of the top point of the base arc segment can be determined, and because the width of the base arc area can be generally selected as an empirical value constant, the abscissa x of two end points of the base arc segment can be obtained1And x2Then according to the vertex (0, -m delta Z) of the base arc segment and the two ends (x) on the diameter of the optical zone of the cornea1，Z(x1) And (x)2，Z(x2) Using the principle of three-point co-circularity, calculating the radius of curvature of the base arc segment, and since the calculated radius of curvature of the base arc segment is larger than the radius of curvature of the optical zone of the cornea before correction, there will be a change in tear film thickness when the lens is placed on the cornea. Then obtaining the integral area S of the cross section of the tear film in the basal arc regionBC。
Step S40, in the adaptive arc area, different amounts of the points on the cornea are played in the normal direction, horizontal direction or vertical direction of the points to obtain the coordinates (x + delta x) of the points on the adaptive arc segment1，Z(x+△x1)+△Z1) To form the gathering, fitting or flattening effect of the adaptive arc area on the cornea, at least three arbitrary points on the adaptive arc section are taken to determine the adaptive arc section, and S is calculatedAC。
Based on the cornea model formula, the coordinates (x, Z) of the point on the cornea in the fitting arc area (generally, the width of the fitting arc area can be determined according to different types of products) are zoomed in the normal direction, horizontal direction or vertical direction of the point by the existing tear film thickness design method to obtain the coordinates (x + Deltax) of the point on the fitting arc section1，Z(x+△x1)+△Z1) At least any three points on the adaptive arc segment are taken, and at least one segment of arc is formed by utilizing a three-point common circle or a multipoint smooth curve, so that the adaptive arc segment is obtained, and the adaptive arc segment is formedThe cornea is gathered, attached and pushed flat by the adaptive arc area, and the cornea shaping mirror can provide more stable central positioning performance and shaping effect according to different putting design of points on the adaptive arc section. Then obtaining the integral area S of the cross section of the tear film in the adaptive arc areaAC。
In this implementation, the adaptation arc section is 1 to 3 sections settings, like this the design of adaptation arc section is comparatively simpler, the plastic mirror of cornea can provide more stable central authorities location performance.
Step S50, based onDetermination of SRCIn the reversal arc area, the point on the cornea is magnified in the normal direction, horizontal direction or vertical direction of the point to obtain the coordinate (x + delta x) of the point on the reversal arc section2，Z(x+△x2)+△Z2) According to at least any point on the arc segment of the reverse arc and SRCTo determine the reversed arc segment.
The shaping effect of the orthokeratology mirror is related to the pressure born by the base arc area, and the pressure born by the base arc area 1 is related to the integral area S of the cross section of the tear film in the base arc areaBCAnd the integrated area S of the tear film cross section in the region of the inverted arc regionRCRelated, general definition
Wherein S isRCAnd SBCProportional, linear superposition, or other functional relationship (e.g., S)RC＝a(SBC) Wherein a is an experimental value constant), thereby enabling the tear storage space capacity to become more stable and ensuring the stability of the shaping effect of the corneal shaping mirror. So as to pass the integral area S of the cross section of the tear film in the basal arc regionBCCalculating to obtain the integral area S of the cross section of the tear film in the region of the inversion arc regionRC。
Then, based on the cornea model formula, the inversion is carried outThe coordinates (x, Z) of a point on the cornea within an arc (generally, the width of the inverted arc may be selected as an empirical constant) are scaled by the conventional tear film thickness design method in the normal direction, horizontal direction or vertical direction of the point to obtain the coordinates (x + Deltax) of the point on the inverted arc2，Z(x+△x2)+△Z2). The base arc segment and the adaptive arc segment are obtained in the previous step, namely the coordinates of two end points of the reversal arc segment are determined, at least any point on the reversal arc segment is only needed to be taken, and the integral area S of the tear film cross section in the reversal arc area is combinedRCThereby obtaining the reversed arc segment.
Step S60, based on
Determination of SPCIn the side arc area, the point on the cornea is magnified in the normal direction, horizontal direction or vertical direction of the point to obtain the coordinate (x + delta x) of the point on the side arc section3，Z(x+△x3)+△Z3) According to at least any two points on the side arc segment and SPCTo determine the side arc segment.
The exchange of tears between the orthokeratology lens and the cornea is the integral area S of the cross section of the tear film in the region of the fitting arcACAnd the integrated area S of the cross section of the tear film in the region of the side arc regionPCThere is a relation between, by definition
Wherein S isACAnd SPCProportional, linear superposition, or other functional relationship (e.g., S)PC＝b(SAC) Where b is an empirical constant), thereby promoting tear exchange. So as to pass the integral area S of the cross section of the tear film in the region of the adaptive arc regionACCalculating to obtain the integral area S of the cross section of the tear film in the side arc areaPC。
Then, taking the cornea model formula as a reference, and dividing the edge arc area into two parts(generally, the width of the side arc region can be selected as an empirical constant) coordinates (x, Z) of a point on the cornea are scaled by a conventional tear film thickness design method in the normal direction, horizontal direction or vertical direction of the point to obtain coordinates (x + Deltax) of a point on the side arc segment3，Z(x+△x3)+△Z3). The adaptive arc segment is obtained in the previous step, namely the coordinate of one end point of the side arc segment is established, at least any two points on the side arc segment are taken, and the integral area S of the tear film cross section in the side arc area is combinedPCThereby obtaining the side arc segment.
In the technical scheme provided by the invention, the coordinates of each arc section of the inner surface of the corneal shaping mirror are obtained by establishing a corneal model formula, and each arc section of the inner surface of the corneal shaping mirror is determined by combining the relation between the integral areas of the cross sections of the tear film in each arc area and the points on the corresponding arc section, so that the more accurate parabola-like actual shape of the cornea is combined in the design of the corneal shaping mirror, and the higher model resolution setting is considered, so that the design has the capability of more accurately correcting the ametropia; and by utilizing the design of the tear film, the volume of the tear storage space becomes more stable by controlling the integral area of the cross section of the tear film in each arc area, thereby ensuring the stability of the shaping effect of the corneal shaping mirror and simultaneously improving the central positioning performance of the corneal shaping mirror.
The present invention also provides a more specific embodiment of a method of making a orthokeratology lens that incorporates an AC arc lens design. The specific steps are as follows (wherein BC is a base arc zone, RC is a reverse arc zone, AC is an adaptive arc zone, and PC is a side arc zone):
1. corneal parameters K, R obtained from corneal topographyxAnd e;
2. determining the cornea basic shape model formula
And calculating the corneal rise variation through the subjective and objective optometry results and Munnerlyn formulaOver-coefficient m adjusted corneal rise change
The actual change m delta Z of the corneal rise in the design is obtained (when R isxWhen smaller and K larger, it is appropriate to take a larger factor m, for example, when R is greaterxWhen K is 46, m should be 2);
3. the corrected rise of the cornea is
Lens BC curvature radius R solved by cornea optical zone diameter D1With Sag1The following relationships exist:
to solve R1Placing the BC over the optical zone of the cornea, the equation for the BC fitting
Where a is the tear film thickness measurement (e.g., 5 μm) of the apex after BC is placed over the corneal optic zone, yielding y ═ fBC(x) Calculating the integral area S of the cross section of the tear film in the BC regionBCIs provided with
(wherein, 3.1 represents half of the value of D, namely the diameter of the optical area of the lens is 6.2 mm);
4. taking the model of the lens with the total diameter of 10.2mm as an example, take any three points (x) on the Z (x) in the diameter of the AC area1,y1),(x2,y2),(x3,y3) Designing according to the 'gathering' principle, and respectively making normal lines for the three points to obtain the three-point normal equation, such as (x)1,y1) Therein is provided with
(x2,y2),(x3,y3) After solving the normal equation, taking the same tear film thickness value in the direction of 'out of cornea' along the normal equation of each point asTear film design in region AC, to give (x)1’,y1’)(x2’,y2’)(x3’,y3') can be easily solved by the three-point coordinates to obtain the circumscribed circle equation of y ═ fAC(x) Calculating the integral area S of the tear film cross section in the AC regionAC；
5. GetNamely SRC＝0.2SBCAnd the RC area is subjected to a straight line design of round corner connection, and then two end points are respectively (3.1, f)BC(3.1)),(4.7,fAC(4.7)), and taking a point lens coordinate in the RC area as (3.9, y)4) Then are respectively represented by (3.1, f)BC(3.1))，(3.9，y4) And (3.9, y)4)，(4.7,fAC(4.7)) can be used for two straight lines4Denotes that it is y ═ fRC1(x) And y ═ fRC2(x) Then there is
To give out y4Finally, f is obtainedRC1(x) And fRC2(x)；
6. The PC region design can be obtained by the same processing method as the RC region.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. The manufacturing method of the orthokeratology mirror is characterized in that a base arc area comprising a base arc section, a reverse arc area comprising a reverse arc section, an adaptation arc area comprising an adaptation arc section and a side arc area comprising a side arc section are sequentially arranged on the inner surface of the orthokeratology mirror from the center to the outside, a tear film is formed between the inner surface of the orthokeratology mirror and the cornea, wherein the cross section of the tear film in the base arc area is provided with the tear filmIntegral area of SBCThe integral area of the cross section of the tear film in the region of the inversion arc is SRCThe integral area of the cross section of the tear film in the adaptive arc area is SACThe integral area of the cross section of the tear film in the arc area is SPCThe manufacturing method of the orthokeratology mirror comprises the following steps:
s10: measurement of corneal curvature K and ametropia R within a specific range of the corneaxAnd corneal eccentricity e, where K is at an interval of 0.05, RxCalculating a corneal curvature radius value R from K with 0.05D as an interval and e with 0.01 as an interval;
s20: establishing a formula of the corneal height Z with the corneal vertex as an origin and the distance from the origin as x
And calculating the expected corneal rise change of the user by the Munnerlyn formula
Obtaining an actual vector height change quantity m delta Z through correction of a coefficient m, wherein D is the diameter of a corneal optical zone, and n is the refractive index of the cornea;
s30: according to the vertex (0, -m delta Z) of the base arc segment and two end points (x) on the diameter of the cornea optical zone1，Z(x1) And (x)2，Z(x2) Calculating the radius of curvature of the base arc segment and calculating SBC；
S40: in the adaptive arc area, different amplification amounts are carried out on a point on the cornea in the normal direction, the horizontal direction or the vertical direction of the point to obtain the coordinate (x plus delta x) of the point on the adaptive arc section1，Z(x+△x1)+△Z1) To form the gathering, fitting or flattening effect of the adaptive arc area on the cornea, at least three arbitrary points on the adaptive arc section are taken to determine the adaptive arc section, and S is calculatedAC；
S50: according toDetermination of SRCIn the reversal arc area, the point on the cornea is magnified in the normal direction, horizontal direction or vertical direction of the point to obtain the coordinate (x + delta x) of the point on the reversal arc section2，Z(x+△x2)+△Z2) According to at least any point on the arc segment of the reverse arc and SRCTo determine the reverse arc segment;
s60: according toDetermination of SPCIn the side arc area, the point on the cornea is magnified in the normal direction, horizontal direction or vertical direction of the point to obtain the coordinate (x + delta x) of the point on the side arc section3，Z(x+△x3)+△Z3) According to at least any two points on the side arc segment and SPCTo determine the side arc segment.
2. The method for manufacturing a orthokeratology mirror as claimed in claim 1, wherein in step S20, m is 0.5 ≦ m ≦ 3.
3. The method of claim 2, wherein m is 1. ltoreq. m.ltoreq.2.
4. The method of claim 1, wherein the adaptive arc segments are arranged in 1 to 3 arc segments.
5. The method for manufacturing a orthokeratology mirror as claimed in claim 1, wherein in step S40,
specifically a proportional relationship or a linear superposition relationship.
6. The method of claim 1, wherein the method comprisesIn the step S60, in the above step,
specifically a proportional relationship or a linear superposition relationship.
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| CN201810485316.2A CN108681100B (en) | 2018-05-17 | 2018-05-17 | Method for manufacturing cornea shaping mirror |
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| CN201810485316.2A CN108681100B (en) | 2018-05-17 | 2018-05-17 | Method for manufacturing cornea shaping mirror |
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| CN108681100A CN108681100A (en) | 2018-10-19 |
| CN108681100B true CN108681100B (en) | 2020-01-07 |
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| CN110426861A (en) * | 2019-08-30 | 2019-11-08 | 裴兰 | A kind of cornea moulding contact lense and its design method |
| CN110515218A (en) * | 2019-09-10 | 2019-11-29 | 欧普康视科技股份有限公司 | A kind of Ortho-K |
| CN111000525B (en) * | 2019-11-21 | 2022-02-15 | 明灏科技（北京）有限公司 | Corneal plastic lens fitting method and system based on big data |
| CN215986770U (en) * | 2020-11-25 | 2022-03-08 | 上海艾康特医疗科技有限公司 | Cornea plastic mirror for reshaping front surface shape of cornea |
| CN112807151B (en) * | 2021-01-12 | 2022-09-13 | 首都医科大学附属北京同仁医院 | Method and system for determining AC value of orthokeratology mirror |
| CN113505466A (en) * | 2021-05-25 | 2021-10-15 | 深圳市新产业眼科新技术有限公司 | Method and device for fitting orthokeratology lens, terminal equipment and storage medium |
| CN113934016B (en) * | 2021-08-24 | 2024-04-16 | 天津世纪康泰生物医学工程有限公司 | Cornea shaping mirror based on artificial intelligence optimization algorithm |
| CN114706233B (en) * | 2022-04-06 | 2023-11-21 | 无锡蕾明视康科技有限公司 | Edge arc design method of cornea shaping mirror |
| TWI812272B (en) * | 2022-06-10 | 2023-08-11 | 亨泰光學股份有限公司 | The Optical Center of Orthokeratology and the Design Structure of Multi-arc Lens |
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