Contact lens intelligent fitting method and device based on OCT (Optical Coherence Tomography)

Abstract

The invention relates to the technical field of lens fitting, and discloses an OCT-based intelligent contact lens fitting method and device, and the method comprises the steps: obtaining an OCT image of a to-be-fitted contact lens, and determining a target lens parameter of the contact lens according to the OCT image of the contact lens; based on the contact lens, target cornea parameters of the wearer are obtained, and contact lens fitting operation is conducted on the wearer according to the target lens parameters of the contact lens and the target cornea parameters of the wearer. Visibly, the target lens parameter of the contact lens can be determined according to the OCT image of the contact lens, and then the contact lens fitting operation is performed on the wearer according to the target lens parameter and the obtained target cornea parameter of the wearer, so that the wearer does not need to try on the contact lens for many times, and the wearing efficiency is improved. The contact lens fitting convenience and efficiency are improved, the contact lens fitting comfort of a wearer can be improved, and the contact lens fitting technology can be popularized and applied.

Description

Technical Field

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

[0002] In the field of ophthalmology, contact lenses have been widely used. According to the purpose of use 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 lenses can accurately fit the wearer's cornea and improve wearing comfort and visual quality, the fitting technology of contact lenses is particularly important.

[0003] Traditional fitting methods mainly rely on the measurement of multiple parameters such as corneal refraction, corneal thickness, corneal sagittal height, etc., and determine the lens type and parameters suitable 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 many different types of lenses, which consumes a lot of manpower and time costs, thus 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 contact lens intelligent fitting method and device, which can eliminate the need for the wearer to try on the contact lens multiple times, thereby improving the convenience and efficiency of contact lens fitting, and further facilitating the wearer's comfort in contact lens fitting, thereby facilitating the promotion and application of contact lens fitting technology.

[0005] In order to solve the above technical problems, the first aspect of the present invention discloses an OCT-based contact lens intelligent fitting method, the method comprising: Obtain an OCT image of a contact lens to be fitted, and determine target lens parameters of the contact lens based on the OCT image of the contact lens; the target lens parameters of the contact lens include a long chord length parameter and a short chord length parameter corresponding to each sag parameter of the contact lens, all of the sag 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 sag parameter are used to indicate the longest edge point distance and the shortest edge point distance of the inner surface of the contact lens passing through the center point of the reference horizontal plane in the reference horizontal plane corresponding to the sag parameter, respectively; Based on the contact lens, the target corneal parameters of the wearer are obtained, and according to 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.

[0006] As an optional embodiment, 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, comprises: When the contact lenses to be fitted include a plurality of OK lenses to be fitted, the corneal inner surface parameters of the wearer are obtained; the fitting arc curvatures of all the OK lenses to be fitted are different, the corneal inner surface parameters of the wearer include a corneal long chord length parameter and a corneal short chord length parameter corresponding to each corneal sagittal height parameter of the wearer's corneal inner surface, all the 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 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 sagittal height parameter of the corneal inner surface, respectively; According to the target lens parameters of all the OK lenses to be fitted, the target sagitta-chord length relationship curves of all the OK lenses to be fitted are established, and according to the corneal inner surface parameters of the wearer, the corneal inner surface sagitta-chord length relationship curve of the wearer is established; each target sagitta-chord length relationship curve of the OK lenses to be fitted includes the sagitta-long chord length relationship curve and the sagitta-short chord length relationship curve of the OK lenses to be fitted, and the corneal inner surface sagitta-chord length relationship curve of the wearer includes the corneal inner surface sagitta-long chord length relationship curve and the corneal inner surface sagitta-short chord length relationship curve of the wearer; According to the target sagittal-chord length relationship curves of all the OK lenses to be fitted and the sagittal-chord length relationship curve of the corneal inner surface of the wearer, the target OK lenses matching the wearer are determined from all the OK lenses to be fitted.

[0007] As an optional embodiment, in the first aspect of the present invention, the target OK lens matching the wearer is determined 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, comprising: Determine the similarity parameter of the sagittal-chord length relationship between the inner surface of the cornea of ​​the wearer and each of the OK lenses to be fitted according to the target sagittal-chord length relationship curves of all the OK lenses to be fitted and the sagittal-chord length relationship curve of the inner surface of the cornea of ​​the wearer; 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 inner surface of the cornea of ​​the wearer in the corneal edge warping area according to the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer; Determine the target angle parameter between the inner surface of the cornea of ​​the wearer and each of the OK lenses to be fitted according to the sagittal height-chord length relationship curves of all the OK lenses to be fitted in the lens edge warping area and the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer in the corneal edge warping area; 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 determine the K parameter similarity parameters between the wearer's cornea and each OK lens to be fitted based on 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; the lens K parameters include lens flat K parameters and lens steep K parameters, and the corneal K parameters include corneal flat K parameters and corneal steep K parameters; According to the similarity parameters of the sagittal height-chord length relationship between the inner surface of the wearer's cornea and each of the OK lenses to be fitted, the target angle parameters between the inner surface of the wearer's cornea and each of the OK lenses to be fitted, and the K parameter similarity parameters between the wearer's cornea and each of the OK lenses to be fitted, the target OK lenses that match the wearer are determined from all the OK lenses to be fitted.

[0008] As an optional embodiment, in the first aspect of the present invention, the target angle parameter between the inner surface of the cornea of ​​the wearer and each of the OK lenses to be fitted is determined based on the sagittal height-chord length relationship curves of all the OK lenses to be fitted in the lens edge warping area and the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer in the corneal edge warping area, including: 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 warping area and the sagittal height-chord length relationship curve of the wearer's corneal inner surface in the corneal edge warping area, determine the edge warping area inflection point between the OK lens to be fitted and the wearer's corneal inner surface, the lens target point of the OK lens to be fitted under the target sagittal height parameter in the lens edge warping area, and the corneal target point of the corneal inner surface under the target sagittal height parameter in the corneal edge warping area; For each of the OK lenses to be fitted, determine the inflection point vector height parameters and inflection point chord length parameters corresponding to the inflection point of the edge warping area, the lens chord length parameters corresponding to the lens target point, and the corneal chord length parameters corresponding to the corneal target point; and determine the target angle parameters between the inner surface of the cornea of ​​the wearer and the OK lenses to be fitted based on the target vector height parameters, the inflection point vector height parameters and inflection point chord length parameters corresponding to the inflection point of the edge warping area, the lens chord length parameters corresponding to the lens target point, and the corneal chord length parameters corresponding to the corneal target point.

[0009] As an optional embodiment, in the first aspect of the present invention, for each OK lens to be fitted, the target angle parameter between the inner surface of the cornea of ​​the wearer and the OK lens to be fitted is determined by the following formula: α= ; Among them, α is the target 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 of 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 vector height parameter, and e is the inflection point vector height parameter corresponding to the inflection point of the edge warping area.

[0010] As an optional embodiment, 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, comprises: When the contact lenses to be fitted include a plurality of scleral lenses to be fitted, the wearer's corneal outer surface parameters are obtained; the lens sagittas of all the scleral lenses to be fitted are different, the wearer's corneal outer surface parameters include a corneal long chord length parameter and a corneal short chord length parameter corresponding to each corneal sagitta parameter of the wearer's corneal outer surface, all the corneal sagitta 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 sagitta parameter of the corneal outer surface are 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 sagitta parameter of the corneal outer surface, respectively; Determine a target corneal chord length parameter of the outer surface of the cornea of ​​the wearer according to the lens diameter parameters of all the scleral lenses to be fitted, and determine a corneal sagittal height parameter and a target edge point corresponding to the target corneal chord length parameter of the outer surface of the cornea according to the target corneal chord length parameter of the outer surface of the cornea and the outer surface parameters of the wearer; Determine a fitting reference point of the corneal outer surface according to a corneal sagittal height parameter corresponding to a target corneal chord length parameter of the corneal outer surface, and fit a fitting semicircular surface corresponding to the corneal outer surface using the target edge point and the fitting reference point as fitting base points; Based on the fitting semicircular surface corresponding to the corneal outer surface and the target lens parameters of all the scleral lenses to be fitted, a target scleral lens matching the wearer is determined from all the scleral lenses to be fitted.

[0011] As an optional embodiment, in the first aspect of the present invention, the step of determining a target scleral lens matching the wearer from all the scleral lenses to be fitted based on the fitting semicircular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted comprises: Determine the area to be measured on the outer surface of the cornea according to a preset measurement chord length range parameter of the outer surface of the cornea, and determine the vertical distance parameter between any to-be-determined point in the area to be measured and the fitting semicircular surface corresponding to the outer surface of the cornea according to the area to be measured on the outer surface of the cornea and the fitting semicircular surface; According to the vertical distance parameters between all the points to be determined and the fitting semicircular surface, it is determined whether there is a point to be adjusted whose vertical distance parameter is less than a preset distance parameter threshold among all the points to be determined; When the judgment result is no, determining a first sagittal height parameter corresponding to the fitting semicircular surface according to the fitting semicircular surface, and determining a target scleral lens matching the wearer from all the scleral lenses to be fitted according to the first sagittal height parameter and target lens parameters of all the scleral lenses to be fitted; When the judgment result is yes, the fitting semicircular surface is adjusted according to the vertical distance parameter between the point to be adjusted and the fitting semicircular surface and the target edge point to obtain the adjusted fitting semicircular surface; according to the adjusted fitting semicircular surface, a second vector height parameter corresponding to the adjusted fitting semicircular surface is determined, and according to the second vector height parameter and the target lens parameters of all the scleral lenses to be fitted, a target scleral lens matching the wearer is determined from all the scleral lenses to be fitted.

[0012] The second aspect of the present invention discloses an OCT-based contact lens intelligent fitting device, the device comprising: An acquisition module, used for acquiring an OCT image of a contact lens to be fitted; A determination module, used for 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 a long chord length parameter and a short chord length parameter corresponding to each vector height parameter of the contact lens, all of the vector 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 vector height parameter are used to indicate the longest edge point distance and the shortest edge point distance of the inner surface of the contact lens passing through the center point of the reference horizontal plane in the reference horizontal plane corresponding to the vector height parameter, respectively; The fitting module is used to obtain the target corneal parameters of the wearer based on the contact lens, 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.

[0013] As an optional implementation, in the second aspect of the present invention, the fitting module 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 including: When the contact lenses to be fitted include a plurality of OK lenses to be fitted, the corneal inner surface parameters of the wearer are obtained; the fitting arc curvatures of all the OK lenses to be fitted are different, the corneal inner surface parameters of the wearer include a corneal long chord length parameter and a corneal short chord length parameter corresponding to each corneal sagittal height parameter of the wearer's corneal inner surface, all the 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 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 sagittal height parameter of the corneal inner surface, respectively; According to the target lens parameters of all the OK lenses to be fitted, the target sagitta-chord length relationship curves of all the OK lenses to be fitted are established, and according to the corneal inner surface parameters of the wearer, the corneal inner surface sagitta-chord length relationship curve of the wearer is established; each target sagitta-chord length relationship curve of the OK lenses to be fitted includes the sagitta-long chord length relationship curve and the sagitta-short chord length relationship curve of the OK lenses to be fitted, and the corneal inner surface sagitta-chord length relationship curve of the wearer includes the corneal inner surface sagitta-long chord length relationship curve and the corneal inner surface sagitta-short chord length relationship curve of the wearer; According to the target sagittal-chord length relationship curves of all the OK lenses to be fitted and the sagittal-chord length relationship curve of the corneal inner surface of the wearer, the target OK lenses matching the wearer are determined from all the OK lenses to be fitted.

[0014] As an optional implementation, in the second aspect of the present invention, the fitting module determines the target OK lens matching the wearer from all the OK lenses to be fitted according to the target sagittal-chord length relationship curves of all the OK lenses to be fitted and the corneal inner surface sagittal-chord length relationship curve of the wearer, specifically including: Determine the similarity parameter of the sagittal-chord length relationship between the inner surface of the cornea of ​​the wearer and each of the OK lenses to be fitted according to the target sagittal-chord length relationship curves of all the OK lenses to be fitted and the sagittal-chord length relationship curve of the inner surface of the cornea of ​​the wearer; 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 inner surface of the cornea of ​​the wearer in the corneal edge warping area according to the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer; Determine the target angle parameter between the inner surface of the cornea of ​​the wearer and each of the OK lenses to be fitted according to the sagittal height-chord length relationship curves of all the OK lenses to be fitted in the lens edge warping area and the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer in the corneal edge warping area; 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 determine the K parameter similarity parameters between the wearer's cornea and each OK lens to be fitted based on 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; the lens K parameters include lens flat K parameters and lens steep K parameters, and the corneal K parameters include corneal flat K parameters and corneal steep K parameters; According to the similarity parameters of the sagittal height-chord length relationship between the inner surface of the wearer's cornea and each of the OK lenses to be fitted, the target angle parameters between the inner surface of the wearer's cornea and each of the OK lenses to be fitted, and the K parameter similarity parameters between the wearer's cornea and each of the OK lenses to be fitted, the target OK lenses that match the wearer are determined from all the OK lenses to be fitted.

[0015] As an optional embodiment, in the second aspect of the present invention, the fitting module determines the target angle parameter between the inner surface of the cornea of ​​the wearer and each of the OK lenses to be fitted according to the sagittal height-chord length relationship curves of all the OK lenses to be fitted in the lens edge warping area and the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer in the corneal edge warping area, specifically including: 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 warping area and the sagittal height-chord length relationship curve of the wearer's corneal inner surface in the corneal edge warping area, determine the edge warping area inflection point between the OK lens to be fitted and the wearer's corneal inner surface, the lens target point of the OK lens to be fitted under the target sagittal height parameter in the lens edge warping area, and the corneal target point of the corneal inner surface under the target sagittal height parameter in the corneal edge warping area; For each of the OK lenses to be fitted, determine the inflection point vector height parameters and inflection point chord length parameters corresponding to the inflection point of the edge warping area, the lens chord length parameters corresponding to the lens target point, and the corneal chord length parameters corresponding to the corneal target point; and determine the target angle parameters between the inner surface of the cornea of ​​the wearer and the OK lenses to be fitted based on the target vector height parameters, the inflection point vector height parameters and inflection point chord length parameters corresponding to the inflection point of the edge warping area, the lens chord length parameters corresponding to the lens target point, and the corneal chord length parameters corresponding to the corneal target point.

[0016] As an optional embodiment, in the second aspect of the present invention, for each OK lens to be fitted, the target angle parameter between the inner surface of the cornea of ​​the wearer and the OK lens to be fitted is determined by the following formula: α= ; Among them, α is the target 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 of 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 vector height parameter, and e is the inflection point vector height parameter corresponding to the inflection point of the edge warping area.

[0017] As an optional implementation, in the second aspect of the present invention, the fitting module 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 including: When the contact lenses to be fitted include a plurality of scleral lenses to be fitted, the wearer's corneal outer surface parameters are obtained; the lens sagittas of all the scleral lenses to be fitted are different, the wearer's corneal outer surface parameters include a corneal long chord length parameter and a corneal short chord length parameter corresponding to each corneal sagitta parameter of the wearer's corneal outer surface, all the corneal sagitta 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 sagitta parameter of the corneal outer surface are 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 sagitta parameter of the corneal outer surface, respectively; Determine a target corneal chord length parameter of the outer surface of the cornea of ​​the wearer according to the lens diameter parameters of all the scleral lenses to be fitted, and determine a corneal sagittal height parameter and a target edge point corresponding to the target corneal chord length parameter of the outer surface of the cornea according to the target corneal chord length parameter of the outer surface of the cornea and the outer surface parameters of the wearer; Determine a fitting reference point of the corneal outer surface according to a corneal sagittal height parameter corresponding to a target corneal chord length parameter of the corneal outer surface, and fit a fitting semicircular surface corresponding to the corneal outer surface using the target edge point and the fitting reference point as fitting base points; Based on the fitting semicircular surface corresponding to the corneal outer surface and the target lens parameters of all the scleral lenses to be fitted, a target scleral lens matching the wearer is determined from all the scleral lenses to be fitted.

[0018] As an optional implementation, in the second aspect of the present invention, the fitting module determines the target scleral lens matching the wearer from all the scleral lenses to be fitted based on the fitting semicircular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted, specifically comprising: Determine the area to be measured on the outer surface of the cornea according to a preset measurement chord length range parameter of the outer surface of the cornea, and determine the vertical distance parameter between any to-be-determined point in the area to be measured and the fitting semicircular surface corresponding to the outer surface of the cornea according to the area to be measured on the outer surface of the cornea and the fitting semicircular surface; According to the vertical distance parameters between all the points to be determined and the fitting semicircular surface, it is determined whether there is a point to be adjusted whose vertical distance parameter is less than a preset distance parameter threshold among all the points to be determined; When the judgment result is no, determining a first sagittal height parameter corresponding to the fitting semicircular surface according to the fitting semicircular surface, and determining a target scleral lens matching the wearer from all the scleral lenses to be fitted according to the first sagittal height parameter and target lens parameters of all the scleral lenses to be fitted; When the judgment result is yes, the fitting semicircular surface is adjusted according to the vertical distance parameter between the point to be adjusted and the fitting semicircular surface and the target edge point to obtain the adjusted fitting semicircular surface; according to the adjusted fitting semicircular surface, a second vector height parameter corresponding to the adjusted fitting semicircular surface is determined, and according to the second vector height parameter and the target lens parameters of all the scleral lenses to be fitted, a target scleral lens matching the wearer is determined from all the scleral lenses to be fitted.

[0019] The third aspect of the present invention discloses another OCT-based contact lens intelligent fitting device, the device comprising: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the OCT-based contact lens intelligent fitting method disclosed in the first aspect of the present invention.

[0020] The fourth aspect of the present invention discloses a computer storage medium, wherein the computer storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the OCT-based contact lens intelligent fitting method disclosed in the first aspect of the present invention.

[0021] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: In the embodiment of the present invention, an OCT image of a contact lens to be fitted is obtained, and the target lens parameters of the contact lens are determined based on the OCT image of the contact lens; based on the contact lens, the target corneal parameters of the wearer are obtained, and the contact lens fitting operation is performed on the wearer based on the target lens parameters of the contact lens and the target corneal parameters of the wearer. It can be seen that the implementation of the present invention can determine the target lens parameters of the contact lens based on the OCT image of the contact lens, and then perform the contact lens fitting operation on the wearer based on the target lens parameters and the acquired target corneal parameters of the wearer. In this way, the wearer does not need to try on the contact lens multiple times, which improves the convenience and efficiency of contact lens fitting, and is conducive to improving the wearer's comfort in fitting the contact lens, thereby facilitating the promotion and application of contact lens fitting technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a flow chart of an OCT-based contact lens intelligent fitting method disclosed in an embodiment of the present invention; Figure 2 It is a flow chart of another OCT-based contact lens intelligent fitting method disclosed in an embodiment of the present invention; Figure 3 It is a structural schematic diagram of an OCT-based contact lens intelligent fitting device disclosed in an embodiment of the present invention; Figure 4 It is a structural schematic diagram of another OCT-based contact lens intelligent fitting device disclosed in an embodiment of the present invention; Figure 5 is a schematic diagram of an OCT image of a contact lens disclosed in an embodiment of the present invention; Figure 6 It is a schematic diagram of a calculation process of a target angle parameter between the inner surface of a wearer's cornea and a to-be-fitted OK lens disclosed in an embodiment of the present invention; Figure 7 It is a schematic diagram of a fitting process of a target scleral lens disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] 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 "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] 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 the contact lens multiple times, thereby improving the convenience and efficiency of contact lens fitting, and further facilitating the wearer's comfort in contact lens fitting, thereby facilitating the promotion and application of contact lens fitting technology.

[0028] Embodiment 1 See also Figure 1 , Figure 1 : is a flow chart of an OCT-based contact lens intelligent fitting method disclosed in an embodiment of the present invention. Figure 1 The described OCT-based contact lens intelligent fitting method can be applied to fitting corneal contact lenses, and can also be applied to fitting scleral contact lenses. Optionally, the 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 cloud server for processing the contact lens fitting process, etc., which is not limited in the embodiments of the present invention. Figure 1 As shown, the OCT-based contact lens intelligent fitting method may include the following operations: 101. Obtain an OCT image of a contact lens to be fitted, and determine target lens parameters of the contact lens based on the OCT image of the contact lens.

[0029] In an embodiment of the present invention, further, the OCT image of the contact lens is obtained by: determining the target condition of the wearer and obtaining the lens information of the contact lens to be fitted, and determining the image scanning parameters of the contact lens according to the target condition of the wearer and the lens information of the contact lens; and obtaining the OCT image of the contact lens according to the image scanning parameters of the contact lens. Optionally, the target condition may include the lens fitting speed requirement, eye health 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 an image scanning line number parameter, an image scanning line interval parameter, an image scanning number parameter, and an 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.

[0030] Furthermore, the target lens parameters of the contact lens include the long chord length parameter and the short chord length parameter corresponding to each sag parameter of the contact lens, wherein all sag parameters are used to indicate the vertical distance from the central vertex of the inner surface of the contact lens (i.e., the most concave position of the inner surface) to any reference horizontal plane of the contact lens, and the long chord length parameter and the short chord length parameter corresponding to each sag parameter are used to indicate the longest edge point distance and the shortest edge point distance of the inner surface of the contact lens in the reference horizontal plane corresponding to the sag parameter and passing through the center point of the reference horizontal plane, respectively (e.g. Figure 5 As shown, the maximum chord length and minimum chord length under different sagittal heights).

[0031] 102. Based on the contact lens, the target corneal parameters of the wearer are obtained, and according to the target lens parameters of the contact lens and the target corneal parameters of the wearer, the contact lens fitting operation is performed on the wearer.

[0032] In an embodiment of the present invention, further, the target corneal parameters of the wearer are obtained by: determining the target condition of the wearer and obtaining the lens information of the contact lens to be fitted, and determining the corneal scanning parameters of the wearer according to the target condition of the wearer and the lens information of the contact lens; and obtaining the target corneal parameters of the wearer according to the corneal scanning parameters of the wearer. Optionally, the corneal scanning parameters include one or more of a corneal scanning line number parameter, a corneal scanning line interval parameter, a corneal scanning number parameter, and a corneal scanning time parameter.

[0033] It can be seen that the implementation of the embodiment of the present invention can determine the target lens parameters of the contact lens based on the OCT image of the contact lens, and then perform contact lens fitting operations on the wearer based on the target lens parameters and the acquired target corneal parameters of the wearer. In this way, the wearer does not need to try on the contact lens multiple times, which improves the convenience and efficiency of contact lens fitting, and further helps to enhance the wearer's comfort in contact lens fitting, thereby facilitating the promotion and application of contact lens fitting technology.

[0034] In an optional embodiment, the step 102 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: When the contact lenses to be fitted include multiple OK lenses to be fitted, obtaining the wearer's corneal inner surface parameters; According to the target lens parameters of all OK lenses to be fitted, the target sagittal height-chord length relationship curves of all OK lenses to be fitted are established, and according to the wearer's corneal inner surface parameters, the corneal inner surface sagittal height-chord length relationship curve of the wearer is established; According to the target sagittal height-chord length relationship curves of all OK lenses to be fitted and the sagittal height-chord length relationship curve of the wearer's corneal inner surface, the target OK lens that matches the wearer is determined from all OK lenses to be fitted.

[0035] In this optional embodiment, the curvatures of the fitting arcs of all OK lenses to be fitted are different. Further, 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, wherein 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 passing through the center point of the first reference horizontal plane in the first reference horizontal plane corresponding to the corneal sagittal height parameter of the corneal inner surface (refer to Figure 5 to understand).

[0036] 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 (such as a curve made with the sagittal height 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), 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 (such as a curve made with the wearer's corneal sagittal height parameter as the y2 axis and the wearer's corneal long chord length parameter or the corneal short chord length parameter as the x2 axis).

[0037] It can be seen that this optional embodiment 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. In this way, not only the fitting process of contact lenses is simplified and the fitting time is shortened, but also the fitting discomfort or poor correction effect caused by the mismatch between the lens and the corneal morphology is reduced, which is beneficial to improving the wearer's visual quality and fitting satisfaction.

[0038] In another optional embodiment, the above step of determining a target OK lens that matches the wearer from all OK lenses to be fitted according to the target sagittal height-chord length relationship curves of all OK lenses to be fitted and the corneal inner surface sagittal height-chord length relationship curve of the wearer includes: 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; 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; Determine the target angle parameter between the inner surface of the cornea of ​​the wearer and each OK lens to be fitted according to the sagittal height-chord length relationship curves of all the OK lenses to be fitted in the lens edge warping area and the sagittal height-chord length relationship curves of the inner surface of the cornea of ​​the wearer in the corneal edge warping area; 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 determine the K parameter similarity parameters between the wearer's cornea and each OK lens to be fitted based on the lens K parameters of all 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; According to the similarity parameters of the sagittal height-chord length relationship between the inner surface of the wearer's cornea and each OK lens to be fitted, the target 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, the target OK lens that matches the wearer is determined from all the OK lenses to be fitted.

[0039] In this optional embodiment, the similarity parameter of the sagittal height-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 between the inner surface parameters of the wearer's cornea and the target lens parameters of each OK lens to be fitted. The higher the parameter coincidence, the more the curvature of the fitting arc of the OK lens to be fitted is adapted to the wearer's cornea.

[0040] It should be noted that the target angle parameters between the inner surface of the wearer's cornea and each OK lens to be fitted are calculated to screen out the matching target OK lens, and combined with the wearer's tear layer parameters (such as tear layer thickness parameters, tear layer angle parameters, tear layer liquid volume parameters, tear layer liquid distribution position parameters, 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, thereby ensuring the effectiveness of tear exchange in the back edge warping area of ​​the target OK lens.

[0041] Optionally, the target lens diameter range and the target corneal diameter range can be determined based on one or more of the lens structural parameters of each OK lens to be fitted, the eye structural parameters of the wearer, eye health information, etc. Among them, 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. It should be noted that by calculating the K parameter similarity parameter between the wearer's cornea and each OK lens to be fitted, the target OK lens with a higher K parameter similarity parameter is selected, which can ensure that the base curve of the target OK lens is compatible with the corneal base curve of the wearer.

[0042] It can be seen that this optional embodiment can match a target OK lens for the wearer by calculating the similarity parameters of the sagittal height-chord length relationship between the inner surface of the wearer's cornea and each OK lens to be fitted, the target 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. In this way, the compatibility between the target OK lens and the wearer's cornea can be improved, so that the target OK lens can better fit the wearer's corneal shape, reduce friction and discomfort between the lens and the cornea, ensure normal exchange of tears, and thus improve the wearer's wearing comfort and compliance; at the same time, it can also ensure that the lens can more effectively reshape the wearer's cornea to achieve the expected correction effect, so as to improve the wearer's vision, thereby enhancing the wearer's overall visual experience.

[0043] In yet another optional embodiment, the above steps determine the target angle parameter between the inner surface of the cornea of ​​the wearer and each OK lens to be fitted according to the sagittal height-chord length relationship curves of all OK lenses to be fitted in the lens edge warping area and the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer in the corneal edge warping area, including: 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 warping area and the sagittal height-chord length relationship curve of the wearer's corneal inner surface in the corneal edge warping area, determine the edge warping area inflection point between the OK lens to be fitted and the wearer's corneal inner surface, the lens target point of the OK lens to be fitted under the target sagittal height parameter of the lens edge warping area, and the corneal target point of the corneal inner surface under the target sagittal height parameter of the corneal edge warping area; For each OK lens to be fitted, determine the inflection point sagittal height parameters and inflection point chord length parameters corresponding to the inflection point of the edge warping area, the lens chord length parameters corresponding to the lens target point, and the corneal chord length parameters corresponding to the corneal target point; and determine the target angle parameters between the wearer's corneal inner surface and the OK lens to be fitted based on the target sagittal height parameters, the inflection point sagittal height parameters and inflection point chord length parameters corresponding to the inflection point of the edge warping area, the lens chord length parameters corresponding to the lens target point, and the corneal chord length parameters corresponding to the corneal target point.

[0044] In this optional embodiment, further, for each OK lens to be fitted, the target angle parameter between the inner surface of the wearer's cornea and the OK lens to be fitted is determined by the following formula: α= ; Among them, α is the target 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 of 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 sagittal height parameter, and e is the inflection point sagittal height parameter corresponding to the inflection point of the edge warping area (such as Figure 6 As shown, Figure 6 It can be understood as the data of the lens edge warping area 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 area intercepted from the sagittal height-chord length relationship curve of the wearer's corneal inner surface).

[0045] It can be seen that this optional embodiment can calculate the target angle parameters 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 area and the sagittal height-chord length relationship curve of the wearer's corneal inner surface in the corneal edge warping area. This can make the target OK lens accurately match the wearer's unique corneal morphology, and then achieve personalized and precise fitting of the OK lens, thereby improving the wearer's lens fitting accuracy and fitting comfort, and reducing the problems of wearing discomfort or poor correction effect caused by lens mismatch.

[0046] Embodiment 2 See also Figure 2 , Figure 2 is a flow chart of another OCT-based contact lens intelligent fitting method disclosed in an embodiment of the present invention. Figure 2 The described OCT-based contact lens intelligent fitting method can be applied to fitting corneal contact lenses, and can also be applied to fitting scleral contact lenses. Optionally, the 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 cloud server for processing the contact lens fitting process, etc., which is not limited in the embodiments of the present invention. Figure 2 As shown, the OCT-based contact lens intelligent fitting method may include the following operations: 201. Obtain an OCT image of a contact lens to be fitted, and determine target lens parameters of the contact lens based on the OCT image of the contact lens.

[0047] 202. When the contact lenses to be fitted include a plurality of scleral lenses to be fitted, obtaining parameters of the outer surface of the cornea of ​​the wearer.

[0048] In the embodiment of the present invention, the lens sagitta of all scleral lenses to be fitted are different. Further, the wearer's corneal outer surface parameters include the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sagitta parameter of the wearer's corneal outer surface, wherein all corneal sagitta 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 sagitta 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 sagitta parameter of the corneal outer surface (refer to Figure 5 to understand).

[0049] 203. Determine the target corneal chord length parameter of the outer surface of the cornea of ​​the wearer based on the lens diameter parameters of all 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 outer surface of the cornea based on the target corneal chord length parameter of the outer surface of the cornea and the outer surface parameters of the wearer.

[0050] In the embodiment of the present invention, Figure 7 As shown, the target corneal chord length parameter of the wearer's corneal outer surface is Figure 7 The length parameter of L1 in , while points A1 and A2 are the target edge points corresponding to the target corneal chord length parameters on the outer surface of the cornea.

[0051] 204. 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 use the target edge point and the fitting reference point as fitting base points to fit a fitting semicircular surface corresponding to the corneal outer surface.

[0052] In the embodiment of the present invention, for example, Figure 7 As 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 wearer's corneal outer surface must be L1, and then the target edge points A1 and A2 under L1 and the corresponding corneal sagittal height parameters are determined; then, according to the corneal sagittal height parameters under L1 and the lens structure parameters of all the scleral lenses to be fitted, it can be determined that the position that is 300 μm higher than the corneal sagittal height parameters under L1 needs to be used as the fitting reference point of the corneal outer surface - point O, so that A1, A2 and O points are used as fitting base points to fit the fitting semicircular surface corresponding to the corneal outer surface (the fitting semicircular surface can be understood as the simulated inner surface of the scleral lens).

[0053] 205. Based on the fitting semicircular 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.

[0054] In the embodiment of the present invention, for other descriptions of step 201, please refer to the detailed description of step 101 in the first embodiment, and the embodiment of the present invention will not be repeated.

[0055] It can be seen that the implementation of the embodiment of the present invention can fit the fitting semicircular surface corresponding to the outer surface of the cornea of ​​the wearer through the corneal sagittal height parameter corresponding to the target corneal chord length parameter of the outer surface of the cornea, and then match the target scleral lens for the wearer based on the fitting semicircular surface corresponding to the outer surface of the cornea. In this way, the fitting state of the inner surface of the scleral lens can be accurately simulated for the wearer, reducing the discomfort and vision problems caused by lens mismatch, thereby improving the fitting accuracy of the scleral lens and improving the fitting comfort of the wearer; at the same time, it also shortens the fitting cycle of the scleral lens and improves the work efficiency of the optometrist.

[0056] In an optional embodiment, the step 205 above, based on the fitting semicircular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted, determines the target scleral lens matching the wearer from all the scleral lenses to be fitted, including: Determine 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 determine the vertical distance parameter between any to-be-determined point in the area to be measured and the fitting semicircular surface according to the area to be measured on the outer surface of the cornea and the fitting semicircular surface corresponding to the outer surface of the cornea; According to the vertical distance parameters between all the points to be determined and the fitted semicircular surface, it is determined whether there is a point to be adjusted whose vertical distance parameter is less than a preset distance parameter threshold among all the points to be determined; When the judgment result is no, determining a first sagittal height parameter corresponding to the fitted semicircular surface according to the fitted semicircular surface, and determining a target scleral lens matching the wearer from all scleral lenses to be fitted according to the first sagittal height parameter and target lens parameters of all scleral lenses to be fitted; When the judgment result is yes, the fitting semicircular surface is adjusted according to the vertical distance parameter between the point to be adjusted and the fitting semicircular surface and the target edge point to obtain the adjusted fitting semicircular surface; according to the adjusted fitting semicircular surface, the second sagittal height parameter corresponding to the adjusted fitting semicircular surface is determined, and according to the second sagittal height parameter and the target lens parameters of all scleral lenses to be fitted, the target scleral lens matching the wearer is determined from all scleral lenses to be fitted.

[0057] In this optional embodiment, for example, Figure 7As shown in FIG. 1 , after the area to be measured on the outer surface of the cornea is determined 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 fitting semicircular surface can be calculated; and when there is a point to be adjusted whose vertical distance parameter is less than the preset distance parameter threshold value among all the points to be determined (such as Figure 7 ), it is necessary to adjust the fitting semicircular surface to ensure that the vertical distance parameters between the adjusted fitting semicircular surface and any point to be determined in the measured area are less than the preset distance parameter threshold, so that the second sagittal height parameter corresponding to the adjusted fitting semicircular surface, that is, the vertical distance between point O` of the adjusted fitting semicircular surface and L1, is used as the recommended sagittal height parameter of the scleral lens corresponding to the wearer to realize the fitting process of the target scleral lens.

[0058] 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 fitting semicircular surface through the preset measurement chord length range parameter of the outer surface of the cornea, and then realize the simulated adjustment process of the inner surface of the wearer's scleral lens. In this way, those points to be adjusted that have small but non-negligible differences from the fitting semicircular 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 wearer's wearing comfort and visual quality, and promoting the widespread use and popularization of scleral lenses.

[0059] Embodiment 3 See also Figure 3 , Figure 3 Schematic diagram of the structure of an OCT-based contact lens intelligent fitting device disclosed in an embodiment of the present invention. Figure 3 As shown, the OCT-based contact lens intelligent fitting device may include: An acquisition module 301 is used to acquire an OCT image of a contact lens to be fitted; A determination module 302 is used to determine target lens parameters of the contact lens based on the OCT image of the contact lens; The fitting module 303 is used to obtain the target corneal parameters of the wearer based on the contact lens, 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.

[0060] In an embodiment of the present invention, the target lens parameters of the contact lens include a long chord length parameter and a short chord length parameter corresponding to each vector height parameter of the contact lens, all vector 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 vector height parameter are respectively used to indicate the longest edge point distance and the shortest edge point distance of the inner surface of the contact lens in the reference horizontal plane corresponding to the vector height parameter and passing through the center point of the reference horizontal plane.

[0061] It can be seen that implementation Figure 3 The described OCT-based intelligent contact lens fitting device can determine the target lens parameters of the contact lens based on the OCT image of the contact lens, and then perform contact lens fitting operations on the wearer based on the target lens parameters and the acquired target corneal parameters of the wearer. In this way, the wearer does not need to try on the contact lenses multiple times, which improves the convenience and efficiency of contact lens fitting, and further helps to enhance the wearer's comfort in contact lens fitting, thereby facilitating the promotion and application of contact lens fitting technology.

[0062] In an optional embodiment, 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 including: When the contact lenses to be fitted include multiple OK lenses to be fitted, obtaining the wearer's corneal inner surface parameters; According to the target lens parameters of all OK lenses to be fitted, the target sagittal height-chord length relationship curves of all OK lenses to be fitted are established, and according to the wearer's corneal inner surface parameters, the corneal inner surface sagittal height-chord length relationship curve of the wearer is established; According to the target sagittal height-chord length relationship curves of all OK lenses to be fitted and the sagittal height-chord length relationship curve of the wearer's corneal inner surface, the target OK lens that matches the wearer is determined from all OK lenses to be fitted.

[0063] 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.

[0064] 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.

[0065] It can be seen that implementation Figure 3The 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.

[0066] 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: 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; 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; Determine the target angle parameter between the inner surface of the cornea of ​​the wearer and each OK lens to be fitted according to the sagittal height-chord length relationship curves of all the OK lenses to be fitted in the lens edge warping area and the sagittal height-chord length relationship curves of the inner surface of the cornea of ​​the wearer in the corneal edge warping area; 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 determine the K parameter similarity parameters between the wearer's cornea and each OK lens to be fitted based on the lens K parameters of all 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; According to the similarity parameters of the sagittal height-chord length relationship between the inner surface of the wearer's cornea and each OK lens to be fitted, the target 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, the target OK lens that matches the wearer is determined from all the OK lenses to be fitted.

[0067] In this optional embodiment, the lens K parameter includes a lens flat K parameter and a lens steep K parameter, and the corneal K parameter includes a corneal flat K parameter and a corneal steep K parameter.

[0068] It can be seen that implementation Figure 3 The described OCT-based contact lens intelligent fitting device can match a target OK lens for the wearer by calculating the similarity parameters of the sagittal height-chord length relationship between the wearer's corneal inner surface and each OK lens to be fitted, the target angle parameters between the wearer's corneal inner surface 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. In this way, the compatibility between the target OK lens and the wearer's cornea can be improved, so that the target OK lens can better fit the wearer's corneal shape, reduce friction and discomfort between the lens and the cornea, ensure normal exchange of tears, and thus improve the wearer's wearing comfort and compliance; at the same time, it can also ensure that the lens can more effectively reshape the wearer's cornea to achieve the expected correction effect, so as to improve the wearer's vision, thereby enhancing the wearer's overall visual experience.

[0069] In another optional embodiment, the fitting module 303 determines the target angle parameter between the inner surface of the cornea of ​​the wearer and each OK lens to be fitted according to the sagittal height-chord length relationship curves of all OK lenses to be fitted in the lens edge warping area and the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer in the corneal edge warping area, specifically including: 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 warping area and the sagittal height-chord length relationship curve of the wearer's corneal inner surface in the corneal edge warping area, determine the edge warping area inflection point between the OK lens to be fitted and the wearer's corneal inner surface, the lens target point of the OK lens to be fitted under the target sagittal height parameter of the lens edge warping area, and the corneal target point of the corneal inner surface under the target sagittal height parameter of the corneal edge warping area; For each OK lens to be fitted, determine the inflection point sagittal height parameters and inflection point chord length parameters corresponding to the inflection point of the edge warping area, the lens chord length parameters corresponding to the lens target point, and the corneal chord length parameters corresponding to the corneal target point; and determine the target angle parameters between the wearer's corneal inner surface and the OK lens to be fitted based on the target sagittal height parameters, the inflection point sagittal height parameters and inflection point chord length parameters corresponding to the inflection point of the edge warping area, the lens chord length parameters corresponding to the lens target point, and the corneal chord length parameters corresponding to the corneal target point.

[0070] In this optional embodiment, further, for each OK lens to be fitted, the target angle parameter between the inner surface of the wearer's cornea and the OK lens to be fitted is determined by the following formula: α= ; Among them, α is the target 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 of 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 sagittal height parameter, and e is the inflection point sagittal height parameter corresponding to the inflection point of the edge warping area.

[0071] It can be seen that implementation Figure 3 The described OCT-based intelligent contact lens fitting device can calculate the target angle parameters between the wearer's corneal inner surface 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 area and the sagittal height-chord length relationship curve of the wearer's corneal inner surface in the corneal edge warping area. This can make the target OK lens accurately match the wearer's unique corneal morphology, thereby achieving personalized and precise fitting of the OK lens, thereby improving the wearer's lens fitting accuracy and fitting comfort, and reducing the problems of wearing discomfort or poor correction effect caused by lens mismatch.

[0072] In another optional embodiment, 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 including: When the contact lenses to be fitted include a plurality of scleral lenses to be fitted, obtaining the corneal outer surface parameters of the wearer; Determine the target corneal chord length parameter of the wearer's corneal outer surface according to the lens diameter parameters of all 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 use the target edge point and the fitting reference point as fitting base points to fit a fitting semicircular surface corresponding to the corneal outer surface; Based on the fitting semicircular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted, a target scleral lens matching the wearer is determined from all the scleral lenses to be fitted.

[0073] In this optional embodiment, the lens sags of all scleral lenses to be fitted are different, and the wearer's corneal outer surface parameters include the corneal long chord length parameter and the corneal short chord length parameter corresponding to each corneal sag parameter of the wearer's corneal outer surface, and all corneal sag 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 sag 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 in the second reference horizontal plane corresponding to the corneal sag parameter of the corneal outer surface, passing through the center point of the second reference horizontal plane.

[0074] It can be seen that implementation Figure 3 The described OCT-based contact lens intelligent fitting device can fit the fitting semicircular surface corresponding to the outer surface of the cornea of ​​the wearer through the corneal sagittal height parameter corresponding to the target corneal chord length parameter of the outer surface of the cornea, and then match the target scleral lens for the wearer based on the fitting semicircular surface corresponding to the outer surface of the cornea. In this way, the fitting state of the inner surface of the scleral lens can be accurately simulated for the wearer, reducing the discomfort and vision problems caused by lens mismatch, thereby improving the fitting accuracy of the scleral lens and improving the fitting comfort of the wearer; at the same time, it also shortens the fitting cycle of the scleral lens and improves the work efficiency of the optometrist.

[0075] In yet another optional embodiment, the fitting module 303 determines the target scleral lens matching the wearer from all the scleral lenses to be fitted based on the fitting semicircular surface corresponding to the outer surface of the cornea and the target lens parameters of all the scleral lenses to be fitted, specifically including: Determine 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 determine the vertical distance parameter between any to-be-determined point in the area to be measured and the fitting semicircular surface according to the area to be measured on the outer surface of the cornea and the fitting semicircular surface corresponding to the outer surface of the cornea; According to the vertical distance parameters between all the points to be determined and the fitted semicircular surface, it is determined whether there is a point to be adjusted whose vertical distance parameter is less than a preset distance parameter threshold among all the points to be determined; When the judgment result is no, determining a first sagittal height parameter corresponding to the fitted semicircular surface according to the fitted semicircular surface, and determining a target scleral lens matching the wearer from all scleral lenses to be fitted according to the first sagittal height parameter and target lens parameters of all scleral lenses to be fitted; When the judgment result is yes, the fitting semicircular surface is adjusted according to the vertical distance parameter between the point to be adjusted and the fitting semicircular surface and the target edge point to obtain the adjusted fitting semicircular surface; according to the adjusted fitting semicircular surface, the second sagittal height parameter corresponding to the adjusted fitting semicircular surface is determined, and according to the second sagittal height parameter and the target lens parameters of all scleral lenses to be fitted, the target scleral lens matching the wearer is determined from all scleral lenses to be fitted.

[0076] It can be seen that implementation Figure 3 The described OCT-based contact lens intelligent fitting device can calculate the vertical distance parameter between any point to be determined in the measured area of ​​the corneal outer surface and the fitting semicircular surface through the preset measurement chord length range parameter of the corneal outer surface, and then realize the simulated adjustment process of the inner surface of the wearer's scleral lens. In this way, those points to be adjusted that have small but non-negligible differences from the fitting semicircular 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 wearer's wearing comfort and visual quality, and promoting the widespread use and popularization of scleral lenses.

[0077] Embodiment 4 See also Figure 4 , Figure 4 FIG. 1 is a schematic diagram of another OCT-based contact lens intelligent fitting device disclosed in an embodiment of the present invention. Figure 4 As shown, the OCT-based contact lens intelligent fitting device may include: A memory 401 storing executable program codes; a processor 402 coupled to the memory 401; The processor 402 calls the executable program code stored in the memory 401 to execute the steps of the OCT-based contact lens intelligent fitting method described in the first embodiment of the present invention or the second embodiment of the present invention.

[0078] Embodiment 5 An embodiment of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute the steps in the OCT-based contact lens intelligent fitting method described in Embodiment 1 or Embodiment 2 of the present invention.

[0079] Embodiment 6 An embodiment of the present invention discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a computer to execute the steps in the OCT-based contact lens intelligent fitting method described in Example 1 or Example 2.

[0080] The device embodiments described above are only illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, i.e., they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0081] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on such an understanding, the above technical solution can be essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0082] Finally, it should be noted that the OCT-based contact lens intelligent fitting method and device disclosed in the embodiments of the present invention only disclose the preferred embodiments of the present invention, which are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An OCT-based contact lens intelligent fitting method, characterized in that: The method comprises: Obtain an OCT image of a contact lens to be fitted, and determine target lens parameters of the contact lens based on the OCT image of the contact lens; the target lens parameters of the contact lens include a long chord length parameter and a short chord length parameter corresponding to each sag parameter of the contact lens, all of the sag 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 sag parameter are used to indicate the longest edge point distance and the shortest edge point distance of the inner surface of the contact lens passing through the center point of the reference horizontal plane in the reference horizontal plane corresponding to the sag parameter, respectively; Based on the contact lens, the target corneal parameters of the wearer are obtained, and according to 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.

2. The OCT-based contact lens intelligent fitting method according to claim 1, characterized in that: 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, comprises: When the contact lenses to be fitted include a plurality of OK lenses to be fitted, the corneal inner surface parameters of the wearer are obtained; the fitting arc curvatures of all the OK lenses to be fitted are different, the corneal inner surface parameters of the wearer include a corneal long chord length parameter and a corneal short chord length parameter corresponding to each corneal sagittal height parameter of the wearer's corneal inner surface, all the 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 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 sagittal height parameter of the corneal inner surface, respectively; According to the target lens parameters of all the OK lenses to be fitted, the target sagitta-chord length relationship curves of all the OK lenses to be fitted are established, and according to the corneal inner surface parameters of the wearer, the corneal inner surface sagitta-chord length relationship curve of the wearer is established; each target sagitta-chord length relationship curve of the OK lenses to be fitted includes the sagitta-long chord length relationship curve and the sagitta-short chord length relationship curve of the OK lenses to be fitted, and the corneal inner surface sagitta-chord length relationship curve of the wearer includes the corneal inner surface sagitta-long chord length relationship curve and the corneal inner surface sagitta-short chord length relationship curve of the wearer; According to the target sagittal-chord length relationship curves of all the OK lenses to be fitted and the sagittal-chord length relationship curve of the corneal inner surface of the wearer, the target OK lenses matching the wearer are determined from all the OK lenses to be fitted.

3. The OCT-based contact lens intelligent fitting method according to claim 2, characterized in that: The step of determining a target OK lens that matches the wearer from all the OK lenses to be fitted based on 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 comprises: Determine the similarity parameter of the sagittal-chord length relationship between the inner surface of the cornea of ​​the wearer and each of the OK lenses to be fitted according to the target sagittal-chord length relationship curves of all the OK lenses to be fitted and the sagittal-chord length relationship curve of the inner surface of the cornea of ​​the wearer; 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 inner surface of the cornea of ​​the wearer in the corneal edge warping area according to the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer; Determine the target angle parameter between the inner surface of the cornea of ​​the wearer and each of the OK lenses to be fitted according to the sagittal height-chord length relationship curves of all the OK lenses to be fitted in the lens edge warping area and the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer in the corneal edge warping area; 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 determine the K parameter similarity parameters between the wearer's cornea and each OK lens to be fitted based on 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; the lens K parameters include lens flat K parameters and lens steep K parameters, and the corneal K parameters include corneal flat K parameters and corneal steep K parameters; According to the similarity parameters of the sagittal height-chord length relationship between the inner surface of the wearer's cornea and each of the OK lenses to be fitted, the target angle parameters between the inner surface of the wearer's cornea and each of the OK lenses to be fitted, and the K parameter similarity parameters between the wearer's cornea and each of the OK lenses to be fitted, the target OK lenses that match the wearer are determined from all the OK lenses to be fitted.

4. The OCT-based contact lens intelligent fitting method according to claim 3, characterized in that: Determining the target angle parameter between the inner surface of the cornea of ​​the wearer and each of the OK lenses to be fitted based on the sagittal height-chord length relationship curves of all the OK lenses to be fitted in the lens edge warping area and the sagittal height-chord length relationship curve of the inner surface of the cornea of ​​the wearer in the corneal edge warping area includes: 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 warping area and the sagittal height-chord length relationship curve of the wearer's corneal inner surface in the corneal edge warping area, determine the edge warping area inflection point between the OK lens to be fitted and the wearer's corneal inner surface, the lens target point of the OK lens to be fitted under the target sagittal height parameter in the lens edge warping area, and the corneal target point of the corneal inner surface under the target sagittal height parameter in the corneal edge warping area; For each of the OK lenses to be fitted, determine the inflection point vector height parameters and inflection point chord length parameters corresponding to the inflection point of the edge warping area, the lens chord length parameters corresponding to the lens target point, and the corneal chord length parameters corresponding to the corneal target point; and determine the target angle parameters between the inner surface of the cornea of ​​the wearer and the OK lenses to be fitted based on the target vector height parameters, the inflection point vector height parameters and inflection point chord length parameters corresponding to the inflection point of the edge warping area, the lens chord length parameters corresponding to the lens target point, and the corneal chord length parameters corresponding to the corneal target point.

5. The OCT-based contact lens intelligent fitting method according to claim 4, characterized in that: For each OK lens to be fitted, the target angle parameter between the inner surface of the cornea of ​​the wearer and the OK lens to be fitted is determined by the following formula: α= ； Among them, α is the target 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 of 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 vector height parameter, and e is the inflection point vector height parameter corresponding to the inflection point of the edge warping area.

6. The OCT-based contact lens intelligent fitting method according to claim 1, characterized in that: 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, comprises: When the contact lenses to be fitted include a plurality of scleral lenses to be fitted, the wearer's corneal outer surface parameters are obtained; the lens sagittas of all the scleral lenses to be fitted are different, the wearer's corneal outer surface parameters include a corneal long chord length parameter and a corneal short chord length parameter corresponding to each corneal sagitta parameter of the wearer's corneal outer surface, all the corneal sagitta 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 sagitta parameter of the corneal outer surface are 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 sagitta parameter of the corneal outer surface, respectively; Determine a target corneal chord length parameter of the outer surface of the cornea of ​​the wearer according to the lens diameter parameters of all the scleral lenses to be fitted, and determine a corneal sagittal height parameter and a target edge point corresponding to the target corneal chord length parameter of the outer surface of the cornea according to the target corneal chord length parameter of the outer surface of the cornea and the outer surface parameters of the wearer; Determine a fitting reference point of the corneal outer surface according to a corneal sagittal height parameter corresponding to a target corneal chord length parameter of the corneal outer surface, and fit a fitting semicircular surface corresponding to the corneal outer surface using the target edge point and the fitting reference point as fitting base points; Based on the fitting semicircular surface corresponding to the corneal outer surface and the target lens parameters of all the scleral lenses to be fitted, a target scleral lens matching the wearer is determined from all the scleral lenses to be fitted.

7. The OCT-based contact lens intelligent fitting method according to claim 6, characterized in that: The method of determining a target scleral lens matching the wearer from all the scleral lenses to be fitted based on the fitting semicircular surface corresponding to the corneal outer surface and the target lens parameters of all the scleral lenses to be fitted comprises: Determine the area to be measured on the outer surface of the cornea according to a preset measurement chord length range parameter of the outer surface of the cornea, and determine the vertical distance parameter between any to-be-determined point in the area to be measured and the fitting semicircular surface corresponding to the outer surface of the cornea according to the area to be measured on the outer surface of the cornea and the fitting semicircular surface; According to the vertical distance parameters between all the points to be determined and the fitting semicircular surface, it is determined whether there is a point to be adjusted whose vertical distance parameter is less than a preset distance parameter threshold among all the points to be determined; When the judgment result is no, determining a first sagittal height parameter corresponding to the fitting semicircular surface according to the fitting semicircular surface, and determining a target scleral lens matching the wearer from all the scleral lenses to be fitted according to the first sagittal height parameter and target lens parameters of all the scleral lenses to be fitted; When the judgment result is yes, the fitting semicircular surface is adjusted according to the vertical distance parameter between the point to be adjusted and the fitting semicircular surface and the target edge point to obtain the adjusted fitting semicircular surface; according to the adjusted fitting semicircular surface, a second vector height parameter corresponding to the adjusted fitting semicircular surface is determined, and according to the second vector height parameter and the target lens parameters of all the scleral lenses to be fitted, a target scleral lens matching the wearer is determined from all the scleral lenses to be fitted.

8. An OCT-based contact lens intelligent fitting device, characterized in that: The device comprises: An acquisition module, used for acquiring an OCT image of a contact lens to be fitted; A determination module, used for 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 a long chord length parameter and a short chord length parameter corresponding to each vector height parameter of the contact lens, all of the vector 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 vector height parameter are used to indicate the longest edge point distance and the shortest edge point distance of the inner surface of the contact lens passing through the center point of the reference horizontal plane in the reference horizontal plane corresponding to the vector height parameter, respectively; The fitting module is used to obtain the target corneal parameters of the wearer based on the contact lens, 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.

9. An OCT-based contact lens intelligent fitting device, characterized in that: The device comprises: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the OCT-based contact lens intelligent fitting method as described in any one of claims 1-7.

10. A computer storage medium, characterized in that: The computer storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the OCT-based contact lens intelligent fitting method as described in any one of claims 1-7.

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