OCT-Based Intelligent Contact Lens Fitting Method and Device

Abstract

The present invention relates to the technical field of contact lens fitting, and discloses a method and device for intelligent contact lens fitting based on OCT. The method includes: obtaining an OCT image of a contact lens to be fitted, and determining target lens parameters of the contact lens according to the OCT image of the contact lens; based on the contact lens, obtaining target corneal parameters of the wearer, and performing a contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer. It can be seen that implementing the present invention can determine the target lens parameters of the contact lens according to the OCT image of the contact lens, and then perform a contact lens fitting operation on the wearer according to the target lens parameters and the obtained target corneal parameters of the wearer. In this way, it is not necessary for the wearer to try on the contact lens multiple times, improving the convenience and efficiency of contact lens fitting, and further being beneficial to enhancing the fitting comfort of the wearer for the contact lens, thus being beneficial to the popularization and application of contact lens fitting technology.

Description

Technical Field

[0001] The present invention relates to the technical field of contact lens fitting, and particularly to an OCT-based intelligent contact lens fitting method and device. Background Art

[0002] In the field of ophthalmic medicine, contact lenses have been widely used. According to different usage purposes and lens characteristics, contact lenses are mainly divided into two categories: corneal contact lenses (OK lenses) and scleral contact lenses (scleral lenses). Among them, in order to ensure that the contact lens can accurately fit the wearer's cornea and improve the wearing comfort and visual quality, the fitting technology of contact lenses is particularly important.

[0003] Traditional fitting methods mainly rely on the measurement of various parameters such as corneal refraction, corneal thickness, and corneal elevation, and determine the suitable lens type and parameters for the wearer through a complex derivation process based on these parameters. However, in the existing fitting methods, a large amount of eye data of the wearer needs to be collected and analyzed, and the wearer usually needs to try on multiple different types of lenses, which consumes a large amount of human and time costs, thus also limiting the further promotion and application of contact lens technology. It can be seen that it is particularly important to provide a method that can improve the convenience and efficiency of contact lens fitting. Summary of the Invention

[0004] The present invention provides an OCT-based intelligent contact lens fitting method and device, which can eliminate the need for the wearer to try on contact lenses multiple times, improve the convenience and efficiency of contact lens fitting, and further help to enhance the fitting comfort of the wearer for contact lenses, thus facilitating the promotion and application of contact lens fitting technology.

[0005] To solve the above technical problems, in a first aspect, the present invention discloses an OCT-based intelligent contact lens fitting method, the method comprising:

[0006] Obtaining an OCT image of a contact lens to be fitted, and determining target lens parameters of the contact lens according to the OCT image of the contact lens; the target lens parameters of the contact lens include the long chord length parameter and the short chord length parameter corresponding to each elevation parameter of the contact lens, all the elevation parameters are used to indicate the vertical distance from the inner surface center vertex of the contact lens to any reference horizontal plane of the contact lens, and the long chord length parameter and the short chord length parameter corresponding to each elevation parameter are respectively used to indicate the distance from the longest edge point on the inner surface of the contact lens passing through the center point of the reference horizontal plane and the distance from the shortest edge point on the inner surface of the contact lens in the reference horizontal plane corresponding to the elevation parameter;

[0007] Based on the contact lens, obtain the target corneal parameters of the wearer, and perform a contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer.

[0008] As an alternative implementation, in the first aspect of the present invention, the step of obtaining the target corneal parameters of the wearer based on the contact lens and performing a contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer includes:

[0009] When the contact lens to be fitted includes multiple orthokeratology (OK) lenses to be fitted, obtain the parameters of the inner surface of the wearer's cornea; the fitting arc curvatures between all the OK lenses to be fitted are different, and the parameters of the inner surface of the wearer's cornea include the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal elevation parameter on the inner surface of the wearer's cornea. All the corneal elevation parameters on the inner surface of the cornea are used to indicate the vertical distance from the central vertex of the inner surface of the cornea to any first reference horizontal plane corresponding to the inner surface of the cornea. The corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal elevation parameter on the inner surface of the cornea are respectively used to indicate the longest edge point distance and the shortest edge point distance of the inner surface of the cornea passing through the center point of the first reference horizontal plane in the first reference horizontal plane corresponding to the corneal elevation parameter on the inner surface of the cornea;

[0010] According to the target lens parameters of all the OK lenses to be fitted, establish the target elevation-chord length relationship curves of all the OK lenses to be fitted, and according to the parameters of the inner surface of the wearer's cornea, establish the elevation-chord length relationship curve of the inner surface of the wearer's cornea; each target elevation-chord length relationship curve of the OK lens to be fitted includes the elevation-long chord length relationship curve and the elevation-short chord length relationship curve of the OK lens to be fitted, and the elevation-chord length relationship curve of the inner surface of the wearer's cornea includes the elevation-long chord length relationship curve and the elevation-short chord length relationship curve of the inner surface of the wearer's cornea;

[0011] Determine the target OK lens that matches the wearer from all the OK lenses to be fitted according to the target elevation-chord length relationship curves of all the OK lenses to be fitted and the elevation-chord length relationship curve of the inner surface of the wearer's cornea.

[0012] As an alternative implementation, in the first aspect of the present invention, the step of determining the target OK lens that matches the wearer from all the OK lenses to be fitted according to the target elevation-chord length relationship curves of all the OK lenses to be fitted and the elevation-chord length relationship curve of the inner surface of the wearer's cornea includes:

[0013] Determine the similarity parameter of the sagittal height-chord length relationship between the inner surface of the wearer's cornea and each of the to-be-fitted OK lenses according to the target sagittal height-chord length relationship curves of all the to-be-fitted OK lenses and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea.

[0014] According to the target sagittal height-chord length relationship curve of each of the to-be-fitted OK lenses, determine the sagittal height-chord length relationship curve of each of the to-be-fitted OK lenses in the lens edge warping area, and according to the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea, determine the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping area.

[0015] Determine the target angle parameter between the inner surface of the wearer's cornea and each of the to-be-fitted OK lenses according to the sagittal height-chord length relationship curves of all the to-be-fitted OK lenses in the lens edge warping area and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping area.

[0016] Determine the lens K parameter of each of the to-be-fitted OK lenses within the target lens diameter range, and determine the corneal K parameter of the wearer's cornea within the target corneal diameter range, and determine the K parameter similarity parameter between the wearer's cornea and each of the to-be-fitted OK lenses according to the lens K parameters of all the to-be-fitted OK lenses within the target lens diameter range and the corneal K parameter of the wearer's cornea within the target corneal diameter range; the lens K parameter includes the flat K parameter of the lens and the steep K parameter of the lens, and the corneal K parameter includes the flat K parameter of the cornea and the steep K parameter of the cornea.

[0017] Determine the target OK lens that matches the wearer from all the to-be-fitted OK lenses according to the similarity parameter of the sagittal height-chord length relationship between the inner surface of the wearer's cornea and each of the to-be-fitted OK lenses, the target angle parameter between the inner surface of the wearer's cornea and each of the to-be-fitted OK lenses, and the K parameter similarity parameter between the wearer's cornea and each of the to-be-fitted OK lenses.

[0018] As an optional implementation manner, in the first aspect of the present invention, the determining the target angle parameter between the inner surface of the wearer's cornea and each of the to-be-fitted OK lenses according to the sagittal height-chord length relationship curves of all the to-be-fitted OK lenses in the lens edge warping area and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping area includes:

[0019] For each of the to-be-fitted OK lenses, based on the sagitta-chord length relationship curve of the to-be-fitted OK lens in the lens edge warping area and the sagitta-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping area, determine the inflection point in the edge warping area between the to-be-fitted OK lens and the inner surface of the wearer's cornea, the lens target point of the to-be-fitted OK lens under the target sagitta parameter in the lens edge warping area, and the corneal target point of the inner surface of the cornea under the target sagitta parameter in the corneal edge warping area;

[0020] For each of the to-be-fitted OK lenses, determine the inflection point sagitta parameter and inflection point chord length parameter corresponding to the inflection point in the edge warping area, the lens chord length parameter corresponding to the lens target point, and the corneal chord length parameter corresponding to the corneal target point, and based on the target sagitta parameter, the inflection point sagitta parameter and inflection point chord length parameter corresponding to the inflection point in the edge warping area, the lens chord length parameter corresponding to the lens target point, and the corneal chord length parameter corresponding to the corneal target point, determine the target angle parameter between the inner surface of the wearer's cornea and the to-be-fitted OK lens.

[0021] As an alternative implementation manner, in the first aspect of the present invention, for each of the to-be-fitted OK lenses, the target angle parameter between the inner surface of the wearer's cornea and the to-be-fitted OK lens is determined by the following formula:

[0022] α = ;

[0023] where α is the target angle parameter between the inner surface of the wearer's cornea and the to-be-fitted OK lens, a is the inflection point chord length parameter corresponding to the inflection point in the edge warping area, b is the corneal chord length parameter corresponding to the corneal target point, c is the lens chord length parameter corresponding to the lens target point, d is the target sagitta parameter, and e is the inflection point sagitta parameter corresponding to the inflection point in the edge warping area.

[0024] As an alternative implementation manner, in the first aspect of the present invention, the method for obtaining the target corneal parameters of the wearer based on the contact lens and performing the contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer includes:

[0025] When the contact lenses to be fitted include multiple scleral lenses to be fitted, obtain the parameters of the outer surface of the wearer's cornea; the lens sagittal heights between all the scleral lenses to be fitted are different, and the parameters of the outer surface of the wearer's cornea include the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sagittal height parameter of the outer surface of the wearer's cornea. All the corneal sagittal height parameters of the outer surface of the cornea are used to indicate the vertical distance from the central vertex of the outer surface of the cornea to any second reference horizontal plane corresponding to the outer surface of the cornea. The corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sagittal height parameter of the outer surface of the cornea are respectively used to indicate the longest edge point distance and the shortest edge point distance of the outer surface of the cornea passing through the center point of the second reference horizontal plane in the second reference horizontal plane corresponding to the corneal sagittal height parameter of the outer surface of the cornea;

[0026] According to the lens diameter parameters of all the scleral lenses to be fitted, determine the target corneal chord length parameter of the outer surface of the wearer's cornea, and according to the target corneal chord length parameter of the outer surface of the cornea and the parameters of the outer surface of the wearer's cornea, determine the corneal sagittal height parameter and the target edge point corresponding to the target corneal chord length parameter of the outer surface of the cornea;

[0027] According to the corneal sagittal height parameter corresponding to the target corneal chord length parameter of the outer surface of the cornea, determine the fitting reference point of the outer surface of the cornea, and take the target edge point and the fitting reference point as the fitting base points to fit the fitting semi-circular surface corresponding to the outer surface of the cornea;

[0028] Based on the fitting semi-circular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all the scleral lenses to be fitted.

[0029] As an optional implementation manner, in the first aspect of the present invention, the determining the target scleral lens that matches the wearer from all the scleral lenses to be fitted based on the fitting semi-circular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted includes:

[0030] According to the preset measurement chord length range parameter of the outer surface of the cornea, determine the area to be measured on the outer surface of the cornea, and according to the area to be measured on the outer surface of the cornea and the fitting semi-circular surface corresponding to the outer surface of the cornea, determine the vertical distance parameter between any point to be determined in the area to be measured and the fitting semi-circular surface;

[0031] According to the vertical distance parameters between all the points to be determined and the fitting semi-circular surface, determine whether there is an adjustable point among all the points to be determined whose vertical distance parameter is less than the preset distance parameter threshold;

[0032] When the judgment result is negative, according to the fitted semi-circular surface, determine the first sagittal height parameter corresponding to the fitted semi-circular surface, and according to the first sagittal height parameter and the target lens parameters of all the scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all the scleral lenses to be fitted;

[0033] When the judgment result is positive, adjust the fitted semi-circular surface according to the vertical distance parameter between the point to be adjusted and the fitted semi-circular surface and the target edge point to obtain an adjusted fitted semi-circular surface; according to the adjusted fitted semi-circular surface, determine the second sagittal height parameter corresponding to the adjusted fitted semi-circular surface, and according to the second sagittal height parameter and the target lens parameters of all the scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all the scleral lenses to be fitted.

[0034] The second aspect of the present invention discloses an intelligent contact lens fitting device based on OCT, and the device includes:

[0035] An acquisition module, configured to acquire an OCT image of a contact lens to be fitted;

[0036] A determination module, configured to determine the target lens parameters of the contact lens according to the OCT image of the contact lens; the target lens parameters of the contact lens include the long chord length parameter and the short chord length parameter corresponding to each sagittal height parameter of the contact lens, and all the sagittal height parameters are used to indicate the vertical distance from the center vertex of the inner surface of the contact lens to any reference horizontal plane of the contact lens, and the long chord length parameter and the short chord length parameter corresponding to each sagittal height parameter are respectively used to indicate the distance of the longest edge point on the inner surface of the contact lens passing through the center point of the reference horizontal plane and the distance of the shortest edge point on the inner surface in the reference horizontal plane corresponding to the sagittal height parameter;

[0037] A fitting module, configured to acquire the target corneal parameters of the wearer based on the contact lens, and perform a contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer.

[0038] As an optional implementation manner, in the second aspect of the present invention, the manner in which the fitting module acquires the target corneal parameters of the wearer based on the contact lens and performs a contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer specifically includes:

[0039] When the contact lenses to be fitted include multiple orthokeratology lenses (OK lenses) to be fitted, corneal inner surface parameters of the wearer are obtained; the fitting arc curvatures between all the OK lenses to be fitted are different, and the corneal inner surface parameters of the wearer include corneal long chord length parameters and corneal short chord length parameters corresponding to each corneal elevation parameter on the corneal inner surface of the wearer. All the corneal elevation parameters on the corneal inner surface are used to indicate the vertical distance from the central vertex of the corneal inner surface to any first reference horizontal plane corresponding to the corneal inner surface. The corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal elevation parameter on the corneal inner surface are respectively used to indicate the longest edge point distance and the shortest edge point distance of the corneal inner surface passing through the center point of the first reference horizontal plane in the first reference horizontal plane corresponding to the corneal elevation parameter on the corneal inner surface.

[0040] According to the target lens parameters of all the OK lenses to be fitted, a target elevation-chord length relationship curve for all the OK lenses to be fitted is established, and according to the corneal inner surface parameters of the wearer, a corneal inner surface elevation-chord length relationship curve of the wearer is established; the target elevation-chord length relationship curve of each OK lens to be fitted includes an elevation-long chord length relationship curve and an elevation-short chord length relationship curve of the OK lens to be fitted, and the corneal inner surface elevation-chord length relationship curve of the wearer includes a corneal inner surface elevation-long chord length relationship curve and a corneal inner surface elevation-short chord length relationship curve of the wearer.

[0041] According to the target elevation-chord length relationship curves of all the OK lenses to be fitted and the corneal inner surface elevation-chord length relationship curve of the wearer, a target OK lens that matches the wearer is determined from all the OK lenses to be fitted.

[0042] As an optional implementation manner, in the second aspect of the present invention, the manner in which the fitting module determines a target OK lens that matches the wearer from all the OK lenses to be fitted according to the target elevation-chord length relationship curves of all the OK lenses to be fitted and the corneal inner surface elevation-chord length relationship curve of the wearer specifically includes:

[0043] According to the target elevation-chord length relationship curves of all the OK lenses to be fitted and the corneal inner surface elevation-chord length relationship curve of the wearer, an elevation-chord length relationship similarity parameter between the corneal inner surface of the wearer and each OK lens to be fitted is determined.

[0044] According to the target elevation-chord length relationship curve of each orthokeratology (OK) lens to be fitted, determine the elevation-chord length relationship curve of each OK lens to be fitted in the lens edge warping area, and according to the elevation-chord length relationship curve of the inner surface of the wearer's cornea, determine the elevation-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping area;

[0045] According to the elevation-chord length relationship curves of all the OK lenses to be fitted in the lens edge warping area and the elevation-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping area, determine the target included angle parameters between the inner surface of the wearer's cornea and each OK lens to be fitted;

[0046] Determine the lens K parameters of each OK lens to be fitted within the target lens diameter range, and determine the corneal K parameters of the wearer's cornea within the target corneal diameter range, and according to the lens K parameters of all the OK lenses to be fitted within the target lens diameter range and the corneal K parameters of the wearer's cornea within the target corneal diameter range, determine the K parameter similarity parameters between the wearer's cornea and each OK lens to be fitted; the lens K parameters include the flat K parameter of the lens and the steep K parameter of the lens, and the corneal K parameters include the flat K parameter of the cornea and the steep K parameter of the cornea;

[0047] According to the elevation-chord length relationship similarity parameters between the inner surface of the wearer's cornea and each OK lens to be fitted, the target included angle parameters between the inner surface of the wearer's cornea and each OK lens to be fitted, and the K parameter similarity parameters between the wearer's cornea and each OK lens to be fitted, determine the target OK lens that matches the wearer from all the OK lenses to be fitted.

[0048] As an optional implementation manner, in the second aspect of the present invention, the manner in which the fitting module determines the target included angle parameters between the inner surface of the wearer's cornea and each OK lens to be fitted according to the elevation-chord length relationship curves of all the OK lenses to be fitted in the lens edge warping area and the elevation-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping area specifically includes:

[0049] For each OK lens to be fitted, according to the elevation-chord length relationship curve of the OK lens to be fitted in the lens edge warping area and the elevation-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping area, determine the inflection point in the edge warping area between the OK lens to be fitted and the inner surface of the wearer's cornea, the target lens point of the OK lens at the target elevation parameter in the lens edge warping area, and the target corneal point of the inner surface of the cornea at the target elevation parameter in the corneal edge warping area;

[0050] For each of the to-be-fitted OK lenses, determine the inflection point sagittal height parameter and the inflection point chord length parameter corresponding to the inflection point of the edge warping region, the lens chord length parameter corresponding to the lens target point, and the corneal chord length parameter corresponding to the corneal target point, and determine the target included angle parameter between the inner surface of the wearer's cornea and the to-be-fitted OK lens according to the target sagittal height parameter, the inflection point sagittal height parameter and the inflection point chord length parameter corresponding to the inflection point of the edge warping region, the lens chord length parameter corresponding to the lens target point, and the corneal chord length parameter corresponding to the corneal target point.

[0051] As an alternative implementation manner, in the second aspect of the present invention, for each of the to-be-fitted OK lenses, the target included angle parameter between the inner surface of the wearer's cornea and the to-be-fitted OK lens is determined by the following formula:

[0052] α = ;

[0053] where α is the target included angle parameter between the inner surface of the wearer's cornea and the to-be-fitted OK lens, a is the inflection point chord length parameter corresponding to the inflection point of the edge warping region, b is the corneal chord length parameter corresponding to the corneal target point, c is the lens chord length parameter corresponding to the lens target point, d is the target sagittal height parameter, and e is the inflection point sagittal height parameter corresponding to the inflection point of the edge warping region.

[0054] As an alternative implementation manner, in the second aspect of the present invention, the fitting module acquires the target corneal parameters of the wearer based on the contact lens, and the manner of performing the contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer specifically includes:

[0055] When the contact lenses to be fitted include multiple to-be-fitted scleral lenses, acquire the outer surface parameters of the wearer's cornea; the lens sagittal heights between all the to-be-fitted scleral lenses are different, and the outer surface parameters of the wearer's cornea include the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sagittal height parameter of the outer surface of the wearer's cornea, and all the corneal sagittal height parameters of the outer surface of the cornea are used to indicate the vertical distance from the central vertex of the outer surface of the cornea to any second reference horizontal plane corresponding to the outer surface of the cornea, and the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sagittal height parameter of the outer surface of the cornea are respectively used to indicate the longest edge point distance and the shortest edge point distance of the outer surface of the cornea passing through the center point of the second reference horizontal plane in the second reference horizontal plane corresponding to the corneal sagittal height parameter of the outer surface of the cornea;

[0056] According to the lens diameter parameters of all the scleral lenses to be fitted, determine the target corneal chord length parameter of the outer surface of the wearer's cornea, and according to the target corneal chord length parameter of the outer surface of the cornea and the outer surface parameters of the wearer's cornea, determine the corneal sagittal height parameter and the target edge point corresponding to the target corneal chord length parameter of the outer surface of the cornea;

[0057] According to the corneal sagittal height parameter corresponding to the target corneal chord length parameter of the outer surface of the cornea, determine the fitting reference point of the outer surface of the cornea, and use the target edge point and the fitting reference point as the fitting base points to fit the fitting semi-circular surface corresponding to the outer surface of the cornea;

[0058] Based on the fitting semi-circular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all the scleral lenses to be fitted.

[0059] As an optional implementation manner, in the second aspect of the present invention, the manner in which the fitting module determines the target scleral lens that matches the wearer from all the scleral lenses to be fitted based on the fitting semi-circular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted specifically includes:

[0060] According to the preset measurement chord length range parameter of the outer surface of the cornea, determine the area to be measured on the outer surface of the cornea, and according to the area to be measured on the outer surface of the cornea and the fitting semi-circular surface corresponding to the outer surface of the cornea, determine the vertical distance parameter between any point to be determined in the area to be measured and the fitting semi-circular surface;

[0061] According to the vertical distance parameters between all the points to be determined and the fitting semi-circular surface, determine whether there are points to be adjusted among all the points to be determined whose vertical distance parameters are less than the preset distance parameter threshold;

[0062] When the judgment result is no, according to the fitting semi-circular surface, determine the first sagittal height parameter corresponding to the fitting semi-circular surface, and according to the first sagittal height parameter and the target lens parameters of all the scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all the scleral lenses to be fitted;

[0063] When the judgment result is yes, adjust the fitting semi-circular surface according to the vertical distance parameter between the point to be adjusted and the fitting semi-circular surface and the target edge point to obtain an adjusted fitting semi-circular surface; according to the adjusted fitting semi-circular surface, determine the second sagittal height parameter corresponding to the adjusted fitting semi-circular surface, and according to the second sagittal height parameter and the target lens parameters of all the scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all the scleral lenses to be fitted.

[0064] The third aspect of the present invention discloses another OCT-based intelligent contact lens fitting device, which includes:

[0065] A memory storing executable program code;

[0066] A processor coupled to the memory;

[0067] The processor calls the executable program code stored in the memory and executes the OCT-based intelligent contact lens fitting method disclosed in the first aspect of the present invention.

[0068] The fourth aspect of the present invention discloses a computer storage medium storing computer instructions, which are used to execute the OCT-based intelligent contact lens fitting method disclosed in the first aspect of the present invention when called.

[0069] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0070] In the embodiments of the present invention, an OCT image of a contact lens to be fitted is obtained, and based on the OCT image of the contact lens, target lens parameters of the contact lens are determined; based on the contact lens, target corneal parameters of the wearer are obtained, and based on the target lens parameters of the contact lens and the target corneal parameters of the wearer, a contact lens fitting operation is performed on the wearer. It can be seen that implementing the present invention can determine the target lens parameters of the contact lens according to the OCT image of the contact lens, and then perform a contact lens fitting operation on the wearer based on the target lens parameters and the obtained target corneal parameters of the wearer. In this way, it is not necessary for the wearer to try on the contact lens multiple times, improving the convenience and efficiency of contact lens fitting, and further facilitating the improvement of the fitting comfort of the contact lens for the wearer, thus facilitating the popularization and application of contact lens fitting technology. Description of the Drawings

[0071] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0072] Figure 1 is a schematic flowchart of an OCT-based intelligent contact lens fitting method disclosed in an embodiment of the present invention;

[0073] Figure 2 is a schematic flowchart of another OCT-based intelligent contact lens fitting method disclosed in an embodiment of the present invention;

[0074] Figure 3 It is a schematic structural diagram of an intelligent contact lens fitting device based on OCT disclosed in an embodiment of the present invention;

[0075] Figure 4 It is a schematic structural diagram of another intelligent contact lens fitting device based on OCT disclosed in an embodiment of the present invention;

[0076] Figure 5 It is a schematic diagram of an OCT image of a contact lens disclosed in an embodiment of the present invention;

[0077] Figure 6 It is a schematic diagram of the calculation process of the target included angle parameter between the inner surface of the cornea of the wearer and the OK lens to be fitted disclosed in an embodiment of the present invention;

[0078] Figure 7 It is a schematic diagram of the fitting process of a target scleral lens disclosed in an embodiment of the present invention. Detailed implementation manners

[0079] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0080] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or terminal including a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or terminals.

[0081] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0082] The present invention discloses an intelligent contact lens fitting method and device based on OCT, which can eliminate the need for the wearer to try on contact lenses multiple times, improve the convenience and efficiency of contact lens fitting, and thus contribute to enhancing the wearer's comfort during contact lens fitting, and further facilitate the popularization and application of contact lens fitting technology.

[0083] Embodiment 1

[0084] Please refer to Figure 1 , Figure 1 which is a schematic flowchart of an intelligent contact lens fitting method based on OCT disclosed in an embodiment of the present invention. Among them, Figure 1 the described intelligent contact lens fitting method based on OCT can be applied to fitting corneal contact lenses and can also be applied to fitting scleral contact lenses. Optionally, this method can be implemented by a contact lens fitting device, which can be integrated in a contact lens fitting device, or can be a local server or a cloud server for processing the contact lens fitting process, etc., which is not limited in the embodiments of the present invention. As Figure 1 shown, the intelligent contact lens fitting method based on OCT can include the following operations:

[0085] 101. Obtain the OCT image of the contact lens to be fitted, and determine the target lens parameters of the contact lens according to the OCT image of the contact lens.

[0086] In the embodiment of the present invention, further, the OCT image of the contact lens is obtained in the following manner: determine the target situation of the wearer and obtain the lens information of the contact lens to be fitted, and determine the image scanning parameters of the contact lens according to the target situation of the wearer and the lens information of the contact lens; obtain the OCT image of the contact lens according to the image scanning parameters of the contact lens. Among them, optionally, the target situation may include the demand situation of lens fitting speed, eye health condition information, etc., and the lens information of the contact lens may include lens type information, lens specification information, etc.; further optionally, the image scanning parameters of the contact lens include one or more of the image scanning line number parameter, image scanning line interval parameter, image scanning number parameter, and image scanning time parameter, and the OCT image of the contact lens may be a horizontal cross-sectional image of the contact lens or a vertical cross-sectional image of the contact lens.

[0087] Further, the target lens parameters of the contact lens include the long chord length parameter and the short chord length parameter corresponding to each sagittal height parameter of the contact lens. Among them, all sagittal height parameters are used to indicate the vertical distance from the center vertex of the inner surface of the contact lens (i.e., the deepest concave position of the inner surface) to any reference horizontal plane of the contact lens. The long chord length parameter and the short chord length parameter corresponding to each sagittal height parameter are respectively used to indicate the distance from the longest edge point of the inner surface of the contact lens passing through the center point of the reference horizontal plane and the distance from the shortest edge point of the inner surface of the contact lens in the reference horizontal plane corresponding to the sagittal height parameter (as Figure 5 shown, that is, the maximum chord length and the minimum chord length at different sagittal heights).

[0088] 102. Based on the contact lens, obtain the target corneal parameters of the wearer, and perform contact lens fitting operations on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer.

[0089] In the embodiment of the present invention, further, the target corneal parameters of the wearer are obtained in the following manner: determine the target situation of the wearer and obtain the lens information of the contact lens to be fitted, and determine the corneal scanning parameters of the wearer according to the target situation of the wearer and the lens information of the contact lens; obtain the target corneal parameters of the wearer according to the corneal scanning parameters of the wearer. Among them, optionally, the corneal scanning parameters include one or more of the corneal scanning line number parameter, the corneal scanning line interval parameter, the corneal scanning number parameter, and the corneal scanning time parameter.

[0090] It can be seen that implementing the embodiment of the present invention can determine the target lens parameters of the contact lens according to the OCT image of the contact lens, and then perform contact lens fitting operations on the wearer according to the target lens parameters and the obtained target corneal parameters of the wearer. In this way, it is possible to avoid the wearer trying on the contact lens multiple times, improve the convenience and efficiency of contact lens fitting, and further improve the fitting comfort of the wearer for the contact lens, thus facilitating the popularization and application of contact lens fitting technology.

[0091] In an optional embodiment, the above step 102 of obtaining the target corneal parameters of the wearer based on the contact lens and performing contact lens fitting operations on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer includes:

[0092] When the contact lens to be fitted includes multiple orthokeratology lenses to be fitted, obtain the inner surface parameters of the wearer's cornea;

[0093] According to the target lens parameters of all orthokeratology lenses to be fitted, establish the target sagittal height-chord length relationship curve of all orthokeratology lenses to be fitted, and establish the inner surface sagittal height-chord length relationship curve of the wearer's cornea according to the inner surface parameters of the wearer's cornea;

[0094] Based on the target elevation-chord length relationship curves of all OK lenses to be fitted and the elevation-chord length relationship curves of the inner surface of the wearer's cornea, a target OK lens that matches the wearer is determined from all the OK lenses to be fitted.

[0095] In this alternative embodiment, the fitting arc curvatures among all the OK lenses to be fitted are all different. Further, the parameters of the inner surface of the wearer's cornea include the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal elevation parameter of the inner surface of the wearer's cornea. Among them, all the corneal elevation parameters of the inner surface of the cornea are used to indicate the vertical distance from the central vertex of the inner surface of the cornea to any first reference horizontal plane corresponding to the inner surface of the cornea. The corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal elevation parameter of the inner surface of the cornea are respectively used to indicate the longest edge point distance and the shortest edge point distance of the inner surface of the cornea passing through the center point of the first reference horizontal plane in the first reference horizontal plane corresponding to the corneal elevation parameter of the inner surface of the cornea (for reference Figure 5 for understanding).

[0096] Furthermore, the target elevation-chord length relationship curve of each OK lens to be fitted includes the elevation-long chord length relationship curve and the elevation-short chord length relationship curve of the OK lens to be fitted (such as the curve made with the elevation parameter of the OK lens to be fitted as the y1 axis and the long chord length parameter or the short chord length parameter of the OK lens to be fitted as the x1 axis). The elevation-chord length relationship curve of the inner surface of the wearer's cornea includes the elevation-long chord length relationship curve and the elevation-short chord length relationship curve of the inner surface of the wearer's cornea (such as the curve made with the corneal elevation parameter of the wearer as the y2 axis and the corneal long chord length parameter or the corneal short chord length parameter of the wearer as the x2 axis).

[0097] It can be seen that this alternative embodiment can establish the elevation-chord length relationship curve of the inner surface of the wearer's cornea through the parameters of the inner surface of the wearer's cornea, and establish the target elevation-chord length relationship curve of each OK lens to be fitted through the target lens parameters of each OK lens to be fitted. Subsequently, a target OK lens is matched for the wearer. In this way, not only is the fitting process of contact lenses simplified, the fitting time is shortened, but also the problems of fitting discomfort or poor correction effect caused by the mismatch between the lens and the corneal shape are reduced, which is beneficial to improving the visual quality and fitting satisfaction of the wearer.

[0098] In another alternative embodiment, the step of determining a target OK lens that matches the wearer from all the OK lenses to be fitted according to the target elevation-chord length relationship curves of all the OK lenses to be fitted and the elevation-chord length relationship curves of the inner surface of the wearer's cornea includes:

[0099] Determine the similarity parameter of the elevation-chord length relationship between the inner surface of the wearer's cornea and each OK lens to be fitted according to the target elevation-chord length relationship curve of all OK lenses to be fitted and the elevation-chord length relationship curve of the inner surface of the wearer's cornea;

[0100] According to the target elevation-chord length relationship curve of each OK lens to be fitted, determine the elevation-chord length relationship curve of each OK lens to be fitted in the lens edge warping area, and according to the elevation-chord length relationship curve of the inner surface of the wearer's cornea, determine the elevation-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping area;

[0101] Determine the target angle parameter between the inner surface of the wearer's cornea and each OK lens to be fitted according to the elevation-chord length relationship curve of all OK lenses to be fitted in the lens edge warping area and the elevation-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping area;

[0102] Determine the lens K parameter of each OK lens to be fitted within the target lens diameter range, and determine the corneal K parameter of the wearer's cornea within the target corneal diameter range, and determine the similarity parameter of the K parameter between the wearer's cornea and each OK lens to be fitted according to the lens K parameter of all OK lenses to be fitted within the target lens diameter range and the corneal K parameter of the wearer's cornea within the target corneal diameter range;

[0103] Determine the target OK lens that matches the wearer from all the OK lenses to be fitted according to the similarity parameter of the elevation-chord length relationship between the inner surface of the wearer's cornea and each OK lens to be fitted, the target angle parameter between the inner surface of the wearer's cornea and each OK lens to be fitted, and the similarity parameter of the K parameter between the wearer's cornea and each OK lens to be fitted.

[0104] In this optional embodiment, the similarity parameter of the elevation-chord length relationship between the inner surface of the wearer's cornea and each OK lens to be fitted can be understood as the parameter coincidence degree between the inner surface parameter of the wearer's cornea and the target lens parameters of each OK lens to be fitted. The higher the parameter coincidence degree, the more suitable the fitting arc curvature of the OK lens to be fitted is with the wearer's cornea.

[0105] It should be noted that by calculating the target angle parameter between the inner surface of the wearer's cornea and each OK lens to be fitted to screen out the matching target OK lens, and combining the tear film parameters of the wearer (such as tear film thickness parameter, tear film angle parameter, tear film liquid volume parameter, tear film liquid distribution position parameter, etc.), the edge warping angle of the target OK lens can ensure that there is sufficient space between the lens and the wearer's cornea for tear exchange, so as to ensure the tear exchange effectiveness in the posterior edge warping area of the target OK lens.

[0106] Optionally, both the target lens diameter range and the target corneal diameter range can be determined according to one or more of the lens structure parameters of each orthokeratology (OK) lens to be fitted, the eye structure parameters of the wearer, the ocular health status information, etc. Among them, the lens K parameter includes the flat K parameter of the lens and the steep K parameter of the lens, and the corneal K parameter includes the flat K parameter of the cornea and the steep K parameter of the cornea. And it should be noted that by calculating the K parameter similarity parameter between the wearer's cornea and each OK lens to be fitted, and screening out the target OK lens with a higher K parameter similarity parameter, it can ensure that the base curve of the target OK lens is adapted to the base curve of the wearer's cornea.

[0107] It can be seen that this optional embodiment can match a target OK lens for the wearer by calculating the sagittal height-chord length relationship similarity parameter between the inner surface of the wearer's cornea and each OK lens to be fitted, the target angle parameter between the inner surface of the wearer's cornea and each OK lens to be fitted, and the K parameter similarity parameter between the wearer's cornea and each OK lens to be fitted. In this way, the adaptability between the target OK lens and the wearer's cornea can be improved, and then the target OK lens can fit the shape of the wearer's cornea better, reduce the friction and discomfort between the lens and the cornea, ensure the normal exchange of tears, and thus improve the wearing comfort and compliance of the wearer; at the same time, it can also ensure that the lens can reshape the wearer's cornea more effectively, achieve the expected correction effect, improve the wearer's vision, and thus enhance the overall visual experience of the wearer.

[0108] In another optional embodiment, the step of determining the target angle parameter between the inner surface of the wearer's cornea and each OK lens to be fitted according to the sagittal height-chord length relationship curve of all OK lenses to be fitted in the lens edge lift area and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge lift area includes:

[0109] For each OK lens to be fitted, according to the sagittal height-chord length relationship curve of the OK lens to be fitted in the lens edge lift area and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge lift area, determine the edge lift area inflection point between the OK lens to be fitted and the inner surface of the wearer's cornea, the lens target point at the target sagittal height parameter of the OK lens to be fitted in the lens edge lift area, and the corneal target point at the target sagittal height parameter of the inner surface of the wearer's cornea in the corneal edge lift area;

[0110] For each OK lens to be fitted, determine the inflection point sagittal height parameter and the inflection point chord length parameter corresponding to the edge lift area inflection point, the lens chord length parameter corresponding to the lens target point, and the corneal chord length parameter corresponding to the corneal target point, and determine the target angle parameter between the inner surface of the wearer's cornea and the OK lens to be fitted according to the target sagittal height parameter, the inflection point sagittal height parameter and the inflection point chord length parameter corresponding to the edge lift area inflection point, the lens chord length parameter corresponding to the lens target point, and the corneal chord length parameter corresponding to the corneal target point.

[0111] In this alternative embodiment, further, for each orthokeratology (OK) lens to be fitted, the target included angle parameter between the inner surface of the wearer's cornea and the OK lens to be fitted is determined by the following formula:

[0112] α = ;

[0113] where α is the target included angle parameter between the inner surface of the wearer's cornea and the OK lens to be fitted, a is the inflection chord length parameter corresponding to the inflection point of the edge warping region, b is the corneal chord length parameter corresponding to the corneal target point, c is the lens chord length parameter corresponding to the lens target point, d is the target sagittal height parameter, and e is the inflection sagittal height parameter corresponding to the inflection point of the edge warping region (as shown in Figure 6 , it can be understood as the data of the lens edge warping region intercepted from the target sagittal height-chord length relationship curve of the corresponding OK lens to be fitted, and the data of the corneal edge warping region intercepted from the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea). Figure 6

[0114] It can be seen that this alternative embodiment can calculate the target included angle parameter between the inner surface of the wearer's cornea and the OK lens to be fitted through the sagittal height-chord length relationship curve of the OK lens to be fitted in the lens edge warping region and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warping region, so that the target OK lens can be accurately matched to the unique corneal shape of the wearer, thereby realizing the personalized and accurate fitting of OK lenses, improving the fitting accuracy and comfort of the wearer's lenses, and reducing the problems of wearing discomfort or poor correction effect caused by lens mismatch.

[0115] Embodiment Two

[0116] Please refer to Figure 2 , Figure 2 which is a schematic flowchart of another OCT-based intelligent contact lens fitting method disclosed in the embodiments of the present invention. Among them, Figure 2 the described OCT-based intelligent contact lens fitting method can be applied to fitting corneal contact lenses and can also be applied to fitting scleral contact lenses. Optionally, this method can be implemented by a contact lens fitting device, which can be integrated in a contact lens fitting device, or can be a local server or a cloud server for processing the contact lens fitting process, etc., which is not limited in the embodiments of the present invention. As shown in Figure 2 , the OCT-based intelligent contact lens fitting method may include the following operations:

[0117] 201. Obtain the OCT image of the contact lens to be fitted, and determine the target lens parameters of the contact lens according to the OCT image of the contact lens.

[0118] ​202. When the contact lenses to be fitted include multiple scleral lenses to be fitted, obtain the parameters of the outer surface of the wearer's cornea.

[0119] In an embodiment of the present invention, among them, the lens vaults between all the scleral lenses to be fitted are all different. Further, the parameters of the outer surface of the wearer's cornea include the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal vault parameter of the outer surface of the wearer's cornea. Among them, all the corneal vault parameters of the outer surface of the cornea are used to indicate the vertical distance from the central vertex of the outer surface of the cornea to any second reference horizontal plane corresponding to the outer surface of the cornea. The corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal vault parameter of the outer surface of the cornea are respectively used to indicate the longest edge point distance and the shortest edge point distance of the outer surface of the cornea passing through the center point of the second reference horizontal plane in the second reference horizontal plane corresponding to the corneal vault parameter of the outer surface of the cornea (reference can be made to Figure 5 for understanding).

[0120] 203. According to the lens diameter parameters of all the scleral lenses to be fitted, determine the target corneal chord length parameter of the outer surface of the wearer's cornea, and according to the target corneal chord length parameter of the outer surface of the cornea and the parameters of the outer surface of the wearer's cornea, determine the corneal vault parameter corresponding to the target corneal chord length parameter of the outer surface of the cornea and the target edge points.

[0121] In an embodiment of the present invention, as Figure 7 shown, the target corneal chord length parameter of the outer surface of the wearer's cornea is the length parameter of L1 in Figure 7 , and point A1 and point A2 are the target edge points corresponding to the target corneal chord length parameter of the outer surface of the cornea.

[0122] 204. According to the corneal vault parameter corresponding to the target corneal chord length parameter of the outer surface of the cornea, determine the fitting reference point of the outer surface of the cornea, and use the target edge points and the fitting reference point as the fitting base points to fit out the fitting semi-circular surface corresponding to the outer surface of the cornea.

[0123] In an embodiment of the present invention, for example, as Figure 7 shown, according to the lens diameter parameters of all the scleral lenses to be fitted, it is determined that the target corneal chord length parameter of the outer surface of the wearer's cornea needs to be L1, and then the target edge points A1 and A2 under L1 and the corresponding corneal vault parameter are determined; then, according to the corneal vault parameter under L1 and combined with the lens structure parameters of all the scleral lenses to be fitted, it can be determined that a position 300 μm higher than the corneal vault parameter under L1 needs to be used as the fitting reference point - point O of the outer surface of the cornea, and then, with A1, A2 and point O as the fitting base points, the fitting semi-circular surface corresponding to the outer surface of the cornea is fitted out (this fitting semi-circular surface can be understood as the inner surface of the simulated scleral lens).

[0124] 205. Based on the fitting semi-circular surface corresponding to the outer corneal surface and the target lens parameters of all scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all scleral lenses to be fitted.

[0125] In the embodiments of the present invention, for other descriptions of step 201, please refer to the detailed description of step 101 in Embodiment 1, and the embodiments of the present invention will not be elaborated herein.

[0126] It can be seen that implementing the embodiments of the present invention can fit the fitting semi-circular surface corresponding to the outer corneal surface through the corneal sagittal height parameter corresponding to the target corneal chord length parameter of the outer corneal surface of the wearer, and then, based on the fitting semi-circular surface corresponding to the outer corneal surface, match the target scleral lens for the wearer. In this way, the fitting state of the inner surface of the scleral lens can be accurately simulated for the wearer, reducing discomfort and vision problems caused by lens mismatch, thereby improving the fitting accuracy of the scleral lens and the fitting comfort of the wearer; at the same time, the fitting cycle of the scleral lens is also shortened, improving the work efficiency of the optometrist.

[0127] In an alternative embodiment, the determining, from all scleral lenses to be fitted, the target scleral lens that matches the wearer based on the fitting semi-circular surface corresponding to the outer corneal surface and the target lens parameters of all scleral lenses to be fitted in step 205 includes:

[0128] According to the preset measurement chord length range parameter of the outer corneal surface, determine the area to be measured on the outer corneal surface, and based on the area to be measured on the outer corneal surface and the fitting semi-circular surface corresponding to the outer corneal surface, determine the vertical distance parameter between any point to be determined in the area to be measured and the fitting semi-circular surface;

[0129] According to the vertical distance parameters between all points to be determined and the fitting semi-circular surface, determine whether there are points to be adjusted with vertical distance parameters less than the preset distance parameter threshold among all points to be determined;

[0130] When the judgment result is negative, determine the first sagittal height parameter corresponding to the fitting semi-circular surface according to the fitting semi-circular surface, and based on the first sagittal height parameter and the target lens parameters of all scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all scleral lenses to be fitted;

[0131] When the judgment result is positive, adjust the fitting semi-circular surface according to the vertical distance parameter between the point to be adjusted and the fitting semi-circular surface and the target edge point to obtain the adjusted fitting semi-circular surface; determine the second sagittal height parameter corresponding to the adjusted fitting semi-circular surface according to the adjusted fitting semi-circular surface, and based on the second sagittal height parameter and the target lens parameters of all scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all scleral lenses to be fitted.

[0132] In this optional embodiment, for example, as Figure 7 shown, after determining the area to be measured on the outer surface of the cornea according to the preset measurement chord length range parameter L2 of the outer surface of the cornea, the vertical distance parameter between any point to be determined in the area to be measured and the fitted semi-circular surface can be calculated; and when there is an adjustment point (such as point B in Figure 7 ) among all the points to be determined whose vertical distance parameter is less than the preset distance parameter threshold, the fitted semi-circular surface needs to be adjusted to ensure that the vertical distance parameter between the adjusted fitted semi-circular surface and any point to be determined in the area to be measured is less than the preset distance parameter threshold. Thus, the second elevation parameter corresponding to the adjusted fitted semi-circular surface, that is, the vertical distance between the O` point of the adjusted fitted semi-circular surface and L1, is used as the recommended elevation parameter of the scleral lens for the wearer to realize the fitting process of the target scleral lens.

[0133] It can be seen that this optional embodiment can calculate the vertical distance parameter between any point to be determined in the area to be measured on the outer surface of the cornea and the fitted semi-circular surface through the preset measurement chord length range parameter of the outer surface of the cornea, and then realize the simulation adjustment process of the inner surface of the scleral lens for the wearer. In this way, those adjustment points with small but non-negligible differences from the fitted semi-circular surface can be discovered and adjusted, thereby greatly improving the matching accuracy between the scleral lens and the wearer's cornea, which is beneficial to improving the wearing comfort and visual quality of the wearer and promoting the wide use and popularization of the scleral lens.

[0134] Embodiment III

[0135] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of an OCT-based contact lens intelligent fitting device disclosed in an embodiment of the present invention. As Figure 3 shown, the OCT-based contact lens intelligent fitting device may include:

[0136] An acquisition module 301, configured to acquire an OCT image of a contact lens to be fitted;

[0137] A determination module 302, configured to determine the target lens parameters of the contact lens according to the OCT image of the contact lens;

[0138] A fitting module 303, configured to acquire the target corneal parameters of the wearer based on the contact lens, and perform a contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer.

[0139] In an embodiment of the present invention, the target lens parameters of the contact lens include the long chord length parameter and the short chord length parameter corresponding to each sagittal height parameter of the contact lens. All the sagittal height parameters are used to indicate the vertical distance from the center vertex of the inner surface of the contact lens to any reference horizontal plane of the contact lens. The long chord length parameter and the short chord length parameter corresponding to each sagittal height parameter are respectively used to indicate the distance from the longest edge point of the inner surface of the contact lens passing through the center point of the reference horizontal plane and the distance from the shortest edge point of the inner surface of the contact lens in the reference horizontal plane corresponding to the sagittal height parameter.

[0140] It can be seen that implementing Figure 3 The described OCT-based intelligent contact lens fitting device can determine the target lens parameters of the contact lens according to the OCT image of the contact lens, and then perform the contact lens fitting operation on the wearer according to the target lens parameters and the obtained target corneal parameters of the wearer. In this way, it is not necessary for the wearer to try on the contact lens multiple times, which improves the convenience and efficiency of contact lens fitting, and further helps to improve the fitting comfort of the wearer for the contact lens, thus facilitating the popularization and application of contact lens fitting technology.

[0141] In an optional embodiment, the manner in which the fitting module 303 obtains the target corneal parameters of the wearer based on the contact lens and performs the contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer specifically includes:

[0142] When the contact lenses to be fitted include multiple orthokeratology lenses (OK lenses) to be fitted, obtain the corneal inner surface parameters of the wearer;

[0143] According to the target lens parameters of all the OK lenses to be fitted, establish the target sagittal height-chord length relationship curve of all the OK lenses to be fitted, and according to the corneal inner surface parameters of the wearer, establish the corneal inner surface sagittal height-chord length relationship curve of the wearer;

[0144] According to the target sagittal height-chord length relationship curve of all the OK lenses to be fitted and the corneal inner surface sagittal height-chord length relationship curve of the wearer, determine the target OK lens that matches the wearer from all the OK lenses to be fitted.

[0145] In this optional embodiment, the curvatures of the fitting arcs of all OK lenses to be fitted are different, and the wearer's corneal inner surface parameters include the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sagittal height parameter of the wearer's corneal inner surface, and all corneal sagittal height parameters of the corneal inner surface are used to indicate the vertical distance from the central vertex of the corneal inner surface to any first reference horizontal plane corresponding to the corneal inner surface, and the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sagittal height parameter of the corneal inner surface are respectively used to indicate the longest edge point distance and the shortest edge point distance of the corneal inner surface in the first reference horizontal plane corresponding to the corneal sagittal height parameter of the corneal inner surface, passing through the center point of the first reference horizontal plane.

[0146] Furthermore, the target sagittal height-chord length relationship curve of each OK lens to be fitted includes the sagittal height-long chord length relationship curve and the sagittal height-short chord length relationship curve of the OK lens to be fitted, and the wearer's corneal inner surface sagittal height-chord length relationship curve includes the wearer's corneal inner surface sagittal height-long chord length relationship curve and the corneal inner surface sagittal height-short chord length relationship curve.

[0147] It can be seen that implementation Figure 3 The described OCT-based intelligent contact lens fitting device can establish the wearer's corneal inner surface sagitta-chord length relationship curve through the wearer's corneal inner surface parameters, and establish the target sagitta-chord length relationship curve of each OK lens to be fitted through the target lens parameters of each OK lens to be fitted, and then match the target OK lens for the wearer. This not only simplifies the contact lens fitting process and shortens the fitting time, but also reduces the fitting discomfort or poor correction effect caused by the mismatch between the lens and corneal morphology, which is beneficial to improving the wearer's visual quality and fitting satisfaction.

[0148] In another optional embodiment, the fitting module 303 determines the target OK lens that matches the wearer from all the OK lenses to be fitted according to the target sagittal height-chord length relationship curves of all the OK lenses to be fitted and the corneal inner surface sagittal height-chord length relationship curve of the wearer, specifically including:

[0149] Determine the sagittal-chord-length relationship similarity parameter between the corneal inner surface of the wearer and each OK lens to be fitted based on the target sagittal-chord-length relationship curves of all OK lenses to be fitted and the sagittal-chord-length relationship curve of the corneal inner surface of the wearer;

[0150] Determine the sagittal height-chord length relationship curve of each OK lens to be fitted in the lens edge warping area according to the target sagittal height-chord length relationship curve of each OK lens to be fitted, and determine the sagittal height-chord length relationship curve of the wearer's corneal inner surface in the corneal edge warping area according to the sagittal height-chord length relationship curve of the wearer's corneal inner surface;

[0151] Determine the target angle parameter between the inner surface of the wearer's cornea and each OK lens to be fitted according to the sagittal height-chord length relationship curve of all the OK lenses to be fitted in the lens edge bevel area and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge bevel area;

[0152] Determine the lens K parameter of each OK lens to be fitted within the target lens diameter range, and determine the corneal K parameter of the wearer's cornea within the target corneal diameter range. Then, according to the lens K parameters of all the OK lenses to be fitted within the target lens diameter range and the corneal K parameters of the wearer's cornea within the target corneal diameter range, determine the K parameter similarity parameter between the wearer's cornea and each OK lens to be fitted;

[0153] Determine the target OK lens that matches the wearer from all the OK lenses to be fitted according to the sagittal height-chord length relationship similarity parameter between the inner surface of the wearer's cornea and each OK lens to be fitted, the target angle parameter between the inner surface of the wearer's cornea and each OK lens to be fitted, and the K parameter similarity parameter between the wearer's cornea and each OK lens to be fitted.

[0154] In this optional embodiment, the lens K parameter includes the lens flat K parameter and the lens steep K parameter, and the corneal K parameter includes the corneal flat K parameter and the corneal steep K parameter.

[0155] It can be seen that implementing Figure 3 The described OCT-based contact lens intelligent fitting device can calculate the sagittal height-chord length relationship similarity parameter between the inner surface of the wearer's cornea and each OK lens to be fitted, the target angle parameter between the inner surface of the wearer's cornea and each OK lens to be fitted, and the K parameter similarity parameter between the wearer's cornea and each OK lens to be fitted, and match the target OK lens for the wearer. In this way, the adaptability between the target OK lens and the wearer's cornea can be improved, and then the target OK lens can fit the shape of the wearer's cornea better, reduce the friction and discomfort between the lens and the cornea, ensure the normal exchange of tears, and thus improve the wearing comfort and compliance of the wearer; at the same time, it can also ensure that the lens can reshape the wearer's cornea more effectively to achieve the expected correction effect, improve the wearer's vision, and thus enhance the overall visual experience of the wearer.

[0156] In another optional embodiment, the specific manner in which the fitting module 303 determines the target angle parameter between the inner surface of the wearer's cornea and each OK lens to be fitted according to the sagittal height-chord length relationship curve of all the OK lenses to be fitted in the lens edge bevel area and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge bevel area includes:

[0157] For each orthokeratology (OK) lens to be fitted, based on the sagittal height-chord length relationship curve of the OK lens to be fitted in the lens edge bevel area and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge bevel area, determine the inflection point in the edge bevel area between the OK lens to be fitted and the inner surface of the wearer's cornea, the lens target point of the OK lens to be fitted under the target sagittal height parameter in the lens edge bevel area, and the corneal target point of the inner surface of the cornea under the target sagittal height parameter in the corneal edge bevel area;

[0158] For each OK lens to be fitted, determine the inflection point sagittal height parameter and the inflection point chord length parameter corresponding to the inflection point in the edge bevel area, the lens chord length parameter corresponding to the lens target point, and the corneal chord length parameter corresponding to the corneal target point, and based on the target sagittal height parameter, the inflection point sagittal height parameter and the inflection point chord length parameter corresponding to the inflection point in the edge bevel area, the lens chord length parameter corresponding to the lens target point, and the corneal chord length parameter corresponding to the corneal target point, determine the target included angle parameter between the inner surface of the wearer's cornea and the OK lens to be fitted.

[0159] In this alternative embodiment, further, for each OK lens to be fitted, the target included angle parameter between the inner surface of the wearer's cornea and the OK lens to be fitted is determined by the following formula:

[0160] α = ;

[0161] where α is the target included angle parameter between the inner surface of the wearer's cornea and the OK lens to be fitted, a is the inflection point chord length parameter corresponding to the inflection point in the edge bevel area, b is the corneal chord length parameter corresponding to the corneal target point, c is the lens chord length parameter corresponding to the lens target point, d is the target sagittal height parameter, and e is the inflection point sagittal height parameter corresponding to the inflection point in the edge bevel area.

[0162] It can be seen that implementing Figure 3 the described OCT-based contact lens intelligent fitting device can calculate the target included angle parameter between the inner surface of the wearer's cornea and the OK lens to be fitted through the sagittal height-chord length relationship curve of the OK lens to be fitted in the lens edge bevel area and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge bevel area, which can enable the target OK lens to accurately match the unique corneal shape of the wearer, thereby realizing personalized and accurate fitting of OK lenses, improving the accuracy and comfort of lens fitting for the wearer, and reducing problems such as wearing discomfort or poor correction effect caused by lens mismatch.

[0163] In yet another alternative embodiment, the fitting module 303 obtains the target corneal parameters of the wearer based on the contact lens, and the specific manner of performing the contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer includes:

[0164] When the contact lenses to be fitted include multiple scleral lenses to be fitted, obtain the parameters of the outer surface of the wearer's cornea;

[0165] According to the lens diameter parameters of all the scleral lenses to be fitted, determine the target corneal chord length parameters of the outer surface of the wearer's cornea, and according to the target corneal chord length parameters of the outer surface of the cornea and the parameters of the outer surface of the wearer's cornea, determine the corneal sagittal height parameters and target edge points corresponding to the target corneal chord length parameters of the outer surface of the cornea;

[0166] According to the corneal sagittal height parameters corresponding to the target corneal chord length parameters of the outer surface of the cornea, determine the fitting reference points of the outer surface of the cornea, and using the target edge points and the fitting reference points as the fitting base points, fit out the fitting semi-circular surface corresponding to the outer surface of the cornea;

[0167] Based on the fitting semi-circular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all the scleral lenses to be fitted.

[0168] In this optional embodiment, the lens sagittal heights between all the scleral lenses to be fitted are all different. The parameters of the outer surface of the wearer's cornea include the corneal long chord length parameters and corneal short chord length parameters corresponding to each corneal sagittal height parameter of the outer surface of the wearer's cornea. All the corneal sagittal height parameters of the outer surface of the cornea are used to indicate the vertical distance from the central vertex of the outer surface of the cornea to any second reference horizontal plane corresponding to the outer surface of the cornea. The corneal long chord length parameters and corneal short chord length parameters corresponding to each corneal sagittal height parameter of the outer surface of the cornea are respectively used to indicate the longest edge point distance and the shortest edge point distance of the outer surface of the cornea passing through the center point of the second reference horizontal plane in the second reference horizontal plane corresponding to the corneal sagittal height parameter of the outer surface of the cornea.

[0169] It can be seen that implementing Figure 3 The described OCT-based intelligent contact lens fitting device can fit out the fitting semi-circular surface corresponding to the outer surface of the wearer's cornea through the corneal sagittal height parameters corresponding to the target corneal chord length parameters of the outer surface of the wearer's cornea, and then, based on the fitting semi-circular surface corresponding to the outer surface of the cornea, match the target scleral lens for the wearer. In this way, the fitting state of the inner surface of the scleral lens can be accurately simulated for the wearer, reducing discomfort and vision problems caused by lens mismatch, thereby improving the fitting accuracy of the scleral lens and the fitting comfort of the wearer; at the same time, the fitting cycle of the scleral lens is also shortened, and the working efficiency of the optometrist is improved.

[0170] In another optional embodiment, the specific manner in which the fitting module 303 determines the target scleral lens that matches the wearer from all the scleral lenses to be fitted based on the fitting semi-circular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted includes:

[0171] Determine the area to be measured on the outer surface of the cornea according to the preset parameter of the measurement chord length range of the outer surface of the cornea, and determine the vertical distance parameter between any point to be judged in the area to be measured on the outer surface of the cornea and the fitted semi-circular surface corresponding to the outer surface of the cornea;

[0172] According to the vertical distance parameters between all the points to be judged and the fitted semi-circular surface, judge whether there are points to be adjusted among all the points to be judged whose vertical distance parameters are less than the preset distance parameter threshold;

[0173] When the judgment result is negative, determine the first elevation parameter corresponding to the fitted semi-circular surface according to the fitted semi-circular surface, and determine the target scleral lens that matches the wearer from all the scleral lenses to be fitted according to the first elevation parameter and the target lens parameters of all the scleral lenses to be fitted;

[0174] When the judgment result is positive, adjust the fitted semi-circular surface according to the vertical distance parameter between the point to be adjusted and the fitted semi-circular surface and the target edge point to obtain the adjusted fitted semi-circular surface; determine the second elevation parameter corresponding to the adjusted fitted semi-circular surface according to the adjusted fitted semi-circular surface, and determine the target scleral lens that matches the wearer from all the scleral lenses to be fitted according to the second elevation parameter and the target lens parameters of all the scleral lenses to be fitted.

[0175] It can be seen that implementing Figure 3 the described OCT-based contact lens intelligent fitting device can calculate the vertical distance parameter between any point to be judged in the area to be measured on the outer surface of the cornea according to the preset parameter of the measurement chord length range of the outer surface of the cornea, and then realize the simulation adjustment process of the inner surface of the scleral lens for the wearer. In this way, those points to be adjusted with small but non-negligible differences from the fitted semi-circular surface can be found and adjusted, thereby greatly improving the matching accuracy between the scleral lens and the wearer's cornea, which is beneficial to improving the wearing comfort and visual quality of the wearer and promoting the wide use and popularization of scleral lenses.

[0176] Embodiment 4

[0177] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of another OCT-based contact lens intelligent fitting device disclosed in the embodiments of the present invention. As Figure 4 shown, the OCT-based contact lens intelligent fitting device may include:

[0178] A memory 401 storing executable program codes;

[0179] A processor 402 coupled to the memory 401;

[0180] The processor 402 calls the executable program code stored in the memory 401 and executes the steps in the OCT-based intelligent contact lens fitting method described in Embodiment 1 or Embodiment 2 of the present invention.

[0181] Embodiment 5

[0182] An embodiment of the present invention discloses a computer storage medium. The computer storage medium stores computer instructions, which are used to execute the steps in the OCT-based intelligent contact lens fitting method described in Embodiment 1 or Embodiment 2 of the present invention when the computer instructions are called.

[0183] Embodiment 6

[0184] An embodiment of the present invention discloses a computer program product. The computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the steps in the OCT-based intelligent contact lens fitting method described in Embodiment 1 or Embodiment 2.

[0185] The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

[0186] Through the specific descriptions of the above embodiments, those skilled in the art can clearly understand that each implementation manner can be realized by means of software plus a necessary general hardware platform, and of course, it can also be realized by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, and the storage medium includes read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc memories, magnetic disk memories, tape memories, or any other medium that can be used to carry or store data and is computer-readable.

[0187] Finally, it should be noted that: The disclosed intelligent contact lens fitting method and device based on OCT according to the embodiments of the present invention are only the preferred embodiments of the present invention, and are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An OCT-based intelligent contact lens fitting method, characterized in that, The method includes: Obtaining an OCT image of a contact lens to be fitted, and determining target lens parameters of the contact lens according to the OCT image of the contact lens; the target lens parameters of the contact lens include long chord length parameters and short chord length parameters corresponding to each sagittal height parameter of the contact lens, and all the sagittal height parameters are used to indicate the vertical distance from the central vertex of the inner surface of the contact lens to any reference horizontal plane of the contact lens, and the long chord length parameter and the short chord length parameter corresponding to each sagittal height parameter are respectively used to indicate the distance from the longest edge point of the inner surface of the contact lens passing through the center point of the reference horizontal plane and the distance from the shortest edge point of the inner surface of the contact lens in the reference horizontal plane corresponding to the sagittal height parameter; Based on the contact lens, obtaining target corneal parameters of the wearer, and performing a contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer; Wherein, the step of based on the contact lens, obtaining target corneal parameters of the wearer, and performing a contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer includes: When the contact lens to be fitted includes a plurality of scleral lenses to be fitted, obtaining corneal outer surface parameters of the wearer; the lens sagittal heights between all the scleral lenses to be fitted are different, and the corneal outer surface parameters of the wearer include corneal long chord length parameters and corneal short chord length parameters corresponding to each corneal sagittal height parameter of the corneal outer surface of the wearer, and all the corneal sagittal height parameters of the corneal outer surface are used to indicate the vertical distance from the central vertex of the corneal outer surface to any second reference horizontal plane corresponding to the corneal outer surface, and the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sagittal height parameter of the corneal outer surface are respectively used to indicate the distance from the longest edge point of the corneal outer surface passing through the center point of the second reference horizontal plane and the distance from the shortest edge point of the corneal outer surface in the second reference horizontal plane corresponding to the corneal sagittal height parameter of the corneal outer surface; Determining target corneal chord length parameters of the corneal outer surface of the wearer according to the lens diameter parameters of all the scleral lenses to be fitted, and determining the corneal sagittal height parameter and the target edge point corresponding to the target corneal chord length parameter of the corneal outer surface according to the target corneal chord length parameters of the corneal outer surface and the corneal outer surface parameters of the wearer; Determining a fitting reference point of the corneal outer surface according to the corneal sagittal height parameter corresponding to the target corneal chord length parameter of the corneal outer surface, and fitting a fitting semi-circular surface corresponding to the corneal outer surface with the target edge point and the fitting reference point as fitting base points; Based on the fitting semi-circular surface corresponding to the corneal outer surface and the target lens parameters of all the scleral lenses to be fitted, determining a target scleral lens that matches the wearer from all the scleral lenses to be fitted.

2. The OCT-based intelligent contact lens fitting method according to claim 1, wherein Based on the contact lens, obtain the target corneal parameters of the wearer, and perform a contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer, including: When the contact lenses to be fitted include multiple orthokeratology (OK) lenses to be fitted, obtain the inner corneal surface parameters of the wearer; the fitting arc curvatures between all the OK lenses to be fitted are different, and the inner corneal surface parameters of the wearer include the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal elevation parameter on the inner corneal surface of the wearer. All the corneal elevation parameters on the inner corneal surface are used to indicate the vertical distance from the central vertex of the inner corneal surface to any first reference horizontal plane corresponding to the inner corneal surface. The corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal elevation parameter on the inner corneal surface are respectively used to indicate the longest edge point distance and the shortest edge point distance of the inner corneal surface passing through the center point of the first reference horizontal plane in the first reference horizontal plane corresponding to the corneal elevation parameter on the inner corneal surface; According to the target lens parameters of all the OK lenses to be fitted, establish the target elevation-chord length relationship curves of all the OK lenses to be fitted, and according to the inner corneal surface parameters of the wearer, establish the inner corneal surface elevation-chord length relationship curve of the wearer; the target elevation-chord length relationship curve of each OK lens to be fitted includes the elevation-long chord length relationship curve and the elevation-short chord length relationship curve of the OK lens to be fitted, and the inner corneal surface elevation-chord length relationship curve of the wearer includes the inner corneal surface elevation-long chord length relationship curve and the inner corneal surface elevation-short chord length relationship curve of the wearer; According to the target elevation-chord length relationship curves of all the OK lenses to be fitted and the inner corneal surface elevation-chord length relationship curve of the wearer, determine the target OK lens that matches the wearer from all the OK lenses to be fitted.

3. The OCT-based intelligent contact lens fitting method according to claim 2, wherein The step of determining the target OK lens that matches the wearer from all the OK lenses to be fitted according to the target elevation-chord length relationship curves of all the OK lenses to be fitted and the inner corneal surface elevation-chord length relationship curve of the wearer includes: According to the target elevation-chord length relationship curves of all the OK lenses to be fitted and the inner corneal surface elevation-chord length relationship curve of the wearer, determine the elevation-chord length relationship similarity parameter between the inner corneal surface of the wearer and each OK lens to be fitted; According to the target elevation-chord length relationship curve of each OK lens to be fitted, determine the elevation-chord length relationship curve of each OK lens in the lens edge warping area, and according to the inner corneal surface elevation-chord length relationship curve of the wearer, determine the elevation-chord length relationship curve of the inner corneal surface of the wearer in the corneal edge warping area; Based on the sagittal height-chord length relationship curves of all the to-be-fitted OK lenses in the lens edge warpage region and the sagittal height-chord length relationship curves of the inner surface of the wearer's cornea in the corneal edge warpage region, determine the target included angle parameters between the inner surface of the wearer's cornea and each of the to-be-fitted OK lenses; Determine the lens K parameters of each of the to-be-fitted OK lenses within the target lens diameter range, and determine the corneal K parameters of the wearer's cornea within the target corneal diameter range. Based on the lens K parameters of all the to-be-fitted OK lenses within the target lens diameter range and the corneal K parameters of the wearer's cornea within the target corneal diameter range, determine the K parameter similarity parameters between the wearer's cornea and each of the to-be-fitted OK lenses; the lens K parameters include the lens flat K parameter and the lens steep K parameter, and the corneal K parameters include the corneal flat K parameter and the corneal steep K parameter; Based on the sagittal height-chord length relationship similarity parameters between the inner surface of the wearer's cornea and each of the to-be-fitted OK lenses, the target included angle parameters between the inner surface of the wearer's cornea and each of the to-be-fitted OK lenses, and the K parameter similarity parameters between the wearer's cornea and each of the to-be-fitted OK lenses, determine the target OK lens that matches the wearer from all the to-be-fitted OK lenses.

4. The OCT-based intelligent contact lens fitting method according to claim 3, wherein The step of determining the target included angle parameters between the inner surface of the wearer's cornea and each of the to-be-fitted OK lenses based on the sagittal height-chord length relationship curves of all the to-be-fitted OK lenses in the lens edge warpage region and the sagittal height-chord length relationship curves of the inner surface of the wearer's cornea in the corneal edge warpage region includes: For each of the to-be-fitted OK lenses, based on the sagittal height-chord length relationship curve of the to-be-fitted OK lens in the lens edge warpage region and the sagittal height-chord length relationship curve of the inner surface of the wearer's cornea in the corneal edge warpage region, determine the edge warpage region inflection point between the to-be-fitted OK lens and the inner surface of the wearer's cornea, the lens target point of the to-be-fitted OK lens at the target sagittal height parameter in the lens edge warpage region, and the corneal target point of the inner surface of the cornea at the target sagittal height parameter in the corneal edge warpage region; For each of the to-be-fitted OK lenses, determine the inflection point sagittal height parameter and inflection point chord length parameter corresponding to the edge warpage region inflection point, the lens chord length parameter corresponding to the lens target point, and the corneal chord length parameter corresponding to the corneal target point. Based on the target sagittal height parameter, the inflection point sagittal height parameter and inflection point chord length parameter corresponding to the edge warpage region inflection point, the lens chord length parameter corresponding to the lens target point, and the corneal chord length parameter corresponding to the corneal target point, determine the target included angle parameters between the inner surface of the wearer's cornea and the to-be-fitted OK lens.

5. The OCT-based intelligent contact lens fitting method according to claim 4, wherein For each of the to-be-fitted OK lenses, the target included angle parameters between the inner surface of the wearer's cornea and the to-be-fitted OK lens are determined by the following formula: α= ； Wherein, α is the target included angle parameter between the inner surface of the cornea of the wearer and the OK lens to be fitted, a is the chord length parameter of the inflection point corresponding to the edge warping region, b is the corneal chord length parameter corresponding to the corneal target point, c is the lens chord length parameter corresponding to the lens target point, d is the target sagittal height parameter, and e is the inflection point sagittal height parameter corresponding to the edge warping region inflection point.

6. The OCT-based intelligent contact lens fitting method according to claim 1, wherein, Determining a target scleral lens that matches the wearer from all the scleral lenses to be fitted based on the fitting semi-circular surface corresponding to the outer surface of the cornea and all the target lens parameters of the scleral lenses to be fitted includes: Determining the area to be measured on the outer surface of the cornea according to the preset measurement chord length range parameter of the outer surface of the cornea, and determining the vertical distance parameter between any point to be determined in the area to be measured and the fitting semi-circular surface according to the area to be measured on the outer surface of the cornea and the fitting semi-circular surface corresponding to the outer surface of the cornea; Judging whether there are points to be adjusted with the vertical distance parameter less than the preset distance parameter threshold among all the points to be determined according to the vertical distance parameters between all the points to be determined and the fitting semi-circular surface; When the judgment result is negative, determining the first sagittal height parameter corresponding to the fitting semi-circular surface according to the fitting semi-circular surface, and determining a target scleral lens that matches the wearer from all the scleral lenses to be fitted according to the first sagittal height parameter and all the target lens parameters of the scleral lenses to be fitted; When the judgment result is positive, adjusting the fitting semi-circular surface according to the vertical distance parameter between the point to be adjusted and the fitting semi-circular surface and the target edge point to obtain an adjusted fitting semi-circular surface; determining the second sagittal height parameter corresponding to the adjusted fitting semi-circular surface according to the adjusted fitting semi-circular surface, and determining a target scleral lens that matches the wearer from all the scleral lenses to be fitted according to the second sagittal height parameter and all the target lens parameters of the scleral lenses to be fitted.

7. An OCT-based intelligent contact lens fitting device, characterized in that, The device includes: An acquisition module, configured to acquire an OCT image of a contact lens to be fitted; A determination module, configured to determine the target lens parameters of the contact lens according to the OCT image of the contact lens; the target lens parameters of the contact lens include the long chord length parameter and the short chord length parameter corresponding to each sagittal height parameter of the contact lens, and all the sagittal height parameters are used to indicate the vertical distance from the center vertex of the inner surface of the contact lens to any reference horizontal plane of the contact lens, and the long chord length parameter and the short chord length parameter corresponding to each sagittal height parameter are respectively used to indicate the distance from the longest edge point of the inner surface of the contact lens passing through the center point of the reference horizontal plane and the distance from the shortest edge point of the inner surface in the reference horizontal plane corresponding to the sagittal height parameter; A fitting module, configured to acquire the target corneal parameters of the wearer based on the contact lens, and perform a contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer. Among them, the fitting module obtains the target corneal parameters of the wearer based on the contact lens, and the method for performing the contact lens fitting operation on the wearer according to the target lens parameters of the contact lens and the target corneal parameters of the wearer specifically includes: When the contact lenses to be fitted include multiple scleral lenses to be fitted, obtain the corneal outer surface parameters of the wearer; the lens sagittal heights between all the scleral lenses to be fitted are different, and the corneal outer surface parameters of the wearer include the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sagittal height parameter of the corneal outer surface of the wearer. All the corneal sagittal height parameters of the corneal outer surface are used to indicate the vertical distance from the central vertex of the corneal outer surface to any second reference horizontal plane corresponding to the corneal outer surface, and the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sagittal height parameter of the corneal outer surface are respectively used to indicate the longest edge point distance and the shortest edge point distance of the corneal outer surface passing through the center point of the second reference horizontal plane in the second reference horizontal plane corresponding to the corneal sagittal height parameter of the corneal outer surface; Determine the target corneal chord length parameter of the corneal outer surface of the wearer according to the lens diameter parameters of all the scleral lenses to be fitted, and determine the corneal sagittal height parameter and the target edge point corresponding to the target corneal chord length parameter of the corneal outer surface according to the target corneal chord length parameter of the corneal outer surface and the corneal outer surface parameters of the wearer; Determine the fitting reference point of the corneal outer surface according to the corneal sagittal height parameter corresponding to the target corneal chord length parameter of the corneal outer surface, and fit the fitting semi-circular surface corresponding to the corneal outer surface with the target edge point and the fitting reference point as the fitting base points; Based on the fitting semi-circular surface corresponding to the corneal outer surface and the target lens parameters of all the scleral lenses to be fitted, determine the target scleral lens that matches the wearer from all the scleral lenses to be fitted.

8. An OCT-based intelligent contact lens fitting device, characterized in that, The device includes: A memory storing executable program code; A processor coupled to the memory; The processor calls the executable program code stored in the memory and executes the OCT-based contact lens intelligent fitting method according to any one of claims 1-6.

9. A computer storage medium, characterized in that, The computer storage medium stores computer instructions, which are used to execute the OCT-based contact lens intelligent fitting method according to any one of claims 1-6 when the computer instructions are called.

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