A method of dividing a functional area of a progressive lens

Abstract

The application provides a progressive lens function area division method, comprising: establishing a lens view point coordinate prediction model special for a lens fitting user; collecting first input information of the lens fitting user when performing a viewing task while wearing a correction trial lens, and correcting a deviation of a pupil center coordinate in the first input information caused by optical refraction of the correction trial lens; inputting the corrected first input information into the lens view point coordinate prediction model special for the lens fitting user, and obtaining corresponding lens view point coordinates through the lens view point coordinate prediction model; and performing lens function area division on the lens actually worn by the lens fitting user based on the obtained lens view point coordinates. The application improves the problem of lacking personalized parameters in conventional fitting; and a corresponding compensation correction method is provided for the problem that the lens optical refraction causes deviation of the camera recorded pupil position from the actual pupil position after the superposition of multiple trial lenses, and the tracking of the lens view point is affected.

Description

Technical Field

[0001] This invention relates to the field of diagnostic identification technology for determining a person's viewpoint for visual correction and progressive lens fitting. The IPC belongs to A61B and can empower progressive lens fitting according to the wearer's personalized eye habits, providing progressive lens users with a more comfortable and natural visual experience. Background Technology

[0002] Adult progressive multifocal lenses achieve a gradual evolution of near vision correction from top to bottom on a single lens. By adding light for near reading, they eliminate or reduce accommodation during reading. The power gradually decreases from the distance vision zone to the near vision zone, allowing the refractive power of the lens to gradually and continuously increase from the distance vision zone at the top of the lens until the required near vision power is reached in the near vision zone at the bottom of the lens. Progressive lenses provide a visual space that gradually evolves from distance to intermediate and then to near vision, offering the wearer a continuous and clear visual effect from far to near. One lens can solve both distance and near vision problems, making it the preferred correction method for presbyopic patients.

[0003] Progressive multifocal lenses offer a natural, convenient, and comfortable correction method for presbyopia patients; however, there are currently several issues with their fitting. Firstly, there are numerous fitting parameters, and the accuracy of these parameters is closely related to fitting comfort. The current fitting process lacks consideration for personalized parameters, ultimately leading to poor fitting comfort. Therefore, when fitting progressive multifocal lenses, it is necessary to accurately calculate traditional factors such as pupillary distance, farsightedness zone, and nearsightedness prescription, while also considering personalized factors, such as the individual eye habits of the wearer, to ensure clear vision for different users in different commonly used areas. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides the following technical solution:

[0005] A method for dividing the functional areas of a progressive lens includes the following steps:

[0006] S1. Establish a lens viewpoint coordinate prediction model exclusive to eyeglass users. The lens viewpoint coordinate prediction model is based on the condition that the eyeglass user wears a trial lens for eye contact. After obtaining and inputting the first input information including the pupil center coordinates, lens-to-eye distance, lens-to-plate distance, and coordinates of the viewing target of one eye of the eyeglass user, the prediction result of the lens viewpoint coordinate of the corresponding side lens can be calculated.

[0007] S2. Collect the first input information of the user when performing vision tasks while wearing the corrective trial lens, and correct the deviation of the pupil center coordinate in the first input information caused by the optical refraction of the corrective trial lens to obtain the corrected first input information.

[0008] S3, input the corrected first input information into the lens view point coordinate prediction model dedicated to the lens wearer, and calculate the corresponding lens view point coordinate through the lens view point coordinate prediction model;

[0009] S4, based on the lens view point coordinate obtained in S3, assist in dividing the lens function area of the lens actually worn by the lens wearer.

[0010] Further, in S1, the method for establishing the lens view point coordinate prediction model comprises the following steps:

[0011] S11, position and fix the head of the lens wearer to form a first posture, and the method for forming the first posture comprises: limiting the head of the lens wearer on a medical headrest, first roughly adjusting the horizontal position and vertical position of the medical headrest, and aligning the pupil center of the eye of the lens wearer with the center calibration point in the center among the nine calibration points on the calibration board; then wearing a trial frame on the lens wearer, first placing a pinhole trial piece in the lens frame corresponding to the eye on the trial frame, the pinhole diameter is 1.5mm, and then finely adjusting the horizontal position and vertical position of the medical headrest until the pupil of the eye of the lens wearer is directly opposite the pinhole of the pinhole trial piece and the lit center calibration point on the calibration board is observed through the pinhole; then keep the head of the lens wearer fixed to form the first posture;

[0012] S12, replace the pinhole trial piece with a piano trial lens, and light the nine calibration points on the calibration board in turn; wherein, each time one of the calibration points is lit, the pupil center of the eye of the lens wearer is turned to and gazes at the calibration point, and the first input information corresponding to the calibration point is measured, the first input information comprising the pupil center coordinate of the eye, the calibration point coordinate, the eye-lens distance, and the lens-board distance, and the lens view point coordinate corresponding to the calibration point is calculated through the first input information, and the prediction model of the functional mapping relationship between the first input information and the lens view point coordinate is formed through fitting, that is, through the lens view point coordinate prediction model, the prediction result of the lens view point coordinate of the corresponding side lens can be calculated after the first input information comprising the pupil center coordinate of the eye of the lens wearer, the eye-lens distance, the lens-board distance, and the view target coordinate is obtained and input.

[0013] Further, in S2, the lens wearer does not limit the posture when performing the viewing task while wearing the corrective trial lens.

[0014] Further, in S2, the viewing task comprises the following steps performed in turn:

[0015] Far-near switching measurement task, which comprises: first watching a 3cm radius circular stimulation paradigm displayed on the far display screen; then watching a 1cm radius circular stimulation paradigm displayed on the near display screen; at this time, the near display screen is held by the wearer or placed on the table;

[0016] Far use zone measurement task, which comprises: watching the far display screen, on which a circular stimulation paradigm with an initial radius of 60cm and increasing by 5cm each time is displayed, until the wearer needs to obviously adjust the posture to stop;

[0017] Transition zone measurement task, which comprises: watching the intermediate display screen, on which a circular stimulation paradigm with an initial radius of 30cm and increasing by 2cm each time is displayed, until the wearer needs to obviously adjust the posture to stop;

[0018] Near use zone measurement task, which comprises: watching the near display screen, on which a circular stimulation paradigm with an initial radius of 20cm and increasing by 1cm each time is displayed, until the wearer needs to obviously adjust the posture to stop; at this time, the near display screen is held by the wearer.

[0019] Further, the far display screen used in the viewing task is vertically placed in front of the wearer at a distance of 3m, and the screen display surface faces the wearer, and the screen display area is 1.16m long and 0.89m high.

[0020] Further, the intermediate display screen used in the viewing task is vertically placed in front of the wearer at a distance of 50cm, and the screen display surface faces the wearer, and the screen display area is 16 inches, and the screen aspect ratio is 4:3 or 16:9.

[0021] Further, the near display screen used in the viewing task is placed in front of the wearer at a distance of 30cm, and the screen display area is 14 inches, and the screen aspect ratio is 4:3 or 16:9.

[0022] The present application has the following beneficial effects: based on the conventional fitting process, the present application uses the technical means of tracking the viewing point on the lens to collect the eye habits of the wearer, accurately divides the functional zones of the lens, and improves the problem of lack of personalized parameters in the conventional fitting; the present application proposes a corresponding compensation correction method for the problem that the tracking of the viewing point on the lens is affected due to the deviation of the pupil position recorded by the camera from the actual pupil position caused by the optical refraction of the lens after the multiple trial lenses are stacked in the fitting process of the progressive lens. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings constituting a part of this application serve to provide further understanding of the present application, the illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute an improper limitation on the present application, and other related drawings can also be obtained by those of ordinary skill in the art without creative labor on the basis of these drawings.

[0024] Figure 1 A schematic diagram of a fitting frame and an infrared camera assembly structure thereon used in the present application;

[0025] Figure 2 A schematic diagram of the relative positions of the stimulation paradigm display screens used in the present application;

[0026] Figure 3 A main flowchart of the present application. DETAILED DESCRIPTION

[0027] The present application will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0028] The hardware devices used in the present application include:

[0029] The fitting frame as shown in Figure 1 : The fitting frame here is a short name for a fitting frame, and two infrared cameras 2 are fixed on the frame body 1, which are respectively directed at and photograph the left and right pupils of the lens-wearing user to obtain the pupil images of the lens-wearing user; specifically, each infrared camera is fixed to the front side of the corresponding side lens frame of the fitting frame frame body through a supporting leg, and the side lens frame is located between the pupil of the lens-wearing user on the same side and the infrared camera lens, that is, the side infrared camera can photograph the image of the pupil on the same side of the lens-wearing user behind the in-frame area of the side lens frame, for example: the infrared camera 2 for photographing the right eye pupil is fixed to the front right side of the right lens frame of the fitting frame frame body through a supporting leg to avoid affecting the user's forward vision, and can photograph the image of the right pupil of the lens-wearing user behind the in-frame area of the right lens frame 11. Further, the sampling frequency of each infrared camera is 120 Hz, and the resolution is 720P.

[0030] Preferably, it further includes a near-infrared illumination light source 3 fixed on the fitting frame frame body 1 for field illumination. Further, the working wavelength of the near-infrared illumination light source is 940 nm.

[0031] A calibration plate provided with nine calibration points arranged in a nine-square format, which can be turned on and off in order. Preferably, the calibration points use LED lights.

[0032] A stimulation paradigm display screen, in combination Figure 2 : an electronic display screen connected with a processing host respectively, for playing and displaying the stimulation paradigm content corresponding to the visual task; the stimulation paradigm display screen includes three kinds, which are:

[0033] a far distance display screen 4, which is vertically placed in front of the fitting user at a distance of 3 m and the screen display surface faces the fitting user, and the screen display area is 1.16 m long and 0.89 m high; and the far distance display screen displays the stimulus paradigm content corresponding to the far distance visual point collection task; preferably, the far distance display screen is a large-screen flat television to simulate the eye use scene of the fitting user when watching television in daily leisure.

[0034] a medium distance display screen 5, which is vertically placed in front of the fitting user at a distance of 50 cm and the screen display surface faces the fitting user, and the screen display area is 16 inches, and the screen aspect ratio is 4:3 or 16:9; and the medium distance display screen displays the stimulus paradigm content corresponding to the medium distance visual point collection task; preferably, the medium distance display screen is a desktop computer display to simulate the eye use scene of the fitting user when watching the desktop computer display in daily office work.

[0035] a near distance display screen 6, which is horizontally placed in front of the fitting user at a distance of 30 cm and the screen display surface faces upward, and the screen display area is 14 inches, and the screen aspect ratio is 4:3 or 16:9; and the near distance display screen displays the stimulus paradigm content corresponding to the near distance visual point collection task; preferably, the near distance display screen is a tablet computer, which is held by the fitting user to watch when the fitting user performs the near distance visual point collection task, to simulate the eye use scene of the fitting user when holding and watching the screen display content of the electronic device (tablet computer, mobile phone, etc.) or the content of a book.

[0036] In the present application, the screen center line of the near distance display screen and the screen center line of the far distance display screen should be aligned, that is, the screen center lines of the two are in the same vertical plane; and the height of the screen of the near distance display screen is lower than the height of the lower edge of the screen of the far distance display screen and the medium distance display screen; at the same time, the height of the lower edge of the screen of the medium distance display screen is higher than the height of the lower edge of the screen of the far distance display screen, and the height of the upper edge of the screen of the medium distance display screen is lower than the height of the upper edge of the screen of the far distance display screen.

[0037] As shown in Figure 3 the present application comprises:

[0038] S1, establishing a lens visual point coordinate prediction model special for the fitting user, the lens visual point coordinate prediction model is based on the condition that the fitting user wears a flat try-on piece, and through the lens visual point coordinate prediction model, the prediction result of the lens visual point coordinate of the corresponding side lens can be calculated after the first input information including the pupil center coordinate of one side eye of the fitting user, the interpupillary distance, the lens plate distance, and the viewing target coordinate is obtained and input;

[0039] the lens plate distance is the distance between the lens center and the display panel center;

[0040] The distance between the lens and the eye is the distance between the center of the lens and the center of the pupil of the person wearing the glasses.

[0041] The visual target is a prominently displayed target on the display panel for the user's pupils to focus on; it can be a dot or a block.

[0042] The method for establishing the lens viewpoint coordinate prediction model includes the following steps:

[0043] S11. Position and fix the user's head to form a first posture. The method for forming the first posture includes: restricting the user's head to a medical headrest; firstly, roughly adjusting the horizontal and vertical positions of the medical headrest so that the center of the pupil of one eye (e.g., the right eye) of the user is aligned with the center calibration point located in the center of the nine calibration points on the calibration plate; then, fitting the user with a trial frame; firstly, placing a pinhole trial lens with a pinhole diameter of 1.5mm in the lens frame 11 corresponding to that eye on the trial frame; finely adjusting the horizontal and vertical positions of the medical headrest until the pupil of that eye of the user is directly aligned with the pinhole of the pinhole trial lens and the illuminated center calibration point of the calibration plate (display panel) can be observed through the pinhole; then, keeping the user's head fixed to form the first posture.

[0044] S12. Replace the pinhole trial lens with a plano trial lens, and sequentially illuminate (highlight) the nine calibration points (visual targets) on the calibration plate (display panel); wherein, for each calibration point illuminated, the pupil center of the user's eye on that side is turned and focused on the calibration point, and the first input information corresponding to the calibration point (visual target) is measured, the first input information including the pupil center coordinates of that eye. The calibration point coordinates (i.e., the coordinates of the viewing target) (x, y), the lens-to-eye distance a, and the lens-to-plate distance b are used to calculate the lens viewpoint coordinates corresponding to the calibration point (viewing target) through the first input information. A prediction model is formed by fitting the first input information to form a functional mapping relationship between the lens viewpoint coordinates and the first input information. That is, the lens viewpoint coordinate prediction model can calculate the prediction result of the lens viewpoint coordinates of the corresponding side lens after obtaining and inputting the first input information including the pupil center coordinates, lens-to-eye distance, lens-to-plate distance, and viewing target coordinates of the eye on one side of the eye wearing glasses.

[0045] In this step, the lens in the lens-plate distance is a plano trial lens, the center of the lens is the center of the plano trial lens, the display plate is a calibration plate, and the center of the display plate is the center calibration point of the calibration plate; the lens in the lens-eye distance is a plano trial lens, the center of the lens is the center of the plano trial lens; the target being viewed is the illuminated calibration point on the calibration plate.

[0046] The "calculating the lens view point coordinate corresponding to the calibration point (viewing target) through the first input information" can be achieved by various existing technologies, and one of the embodiments provided by the present application is as follows: the lens eye distance a, the lens plate distance b, and the coordinate of the center calibration point (0 cm, 0 cm) are measured. The coordinate of the calibration point on the calibration plate is (x, y), and the corresponding coordinate (x * ,y * ) on the lens is calculated according to the similar triangle principle according to the following formula.

[0047]

[0048] The method for establishing the function mapping relationship in the "prediction model for forming a function mapping relationship between the first input information and the lens view point coordinate" can be achieved by various existing technologies, and one of the embodiments provided by the present application is as follows: a six-parameter binary quadratic regression function is used to perform least squares fitting on the relationship between the pupil center coordinate and the corresponding coordinate (x * ,y * ) of the calibration point on the lens, and the obtained fitting parameters (a0, a1, a2, a3, a4, a5) and (b0, b1, b2, b3, b4, b5) are saved as the prediction model.

[0049] The function form of the six-parameter binary quadratic regression function can be as follows:

[0050]

[0051] The same process is performed on the left eye, and the corresponding content of the lens view point coordinate prediction model of the left eye is obtained, which will not be described herein.

[0052] The collection and acquisition of the first input information such as the pupil center coordinate, the lens eye distance, the lens plate distance, and the viewing target coordinate in the present application can be achieved by various existing technologies. For example, the pupil image of the lens fitting user can be obtained by the infrared camera fixed on the aforementioned fitting frame, and under the premise that the distance, angle, and three-dimensional coordinate between the infrared camera and the fitting frame and the pupil of the same side eye of the lens fitting user are known, the pupil center coordinate can be obtained by using the pupil center pixel size and position information in the image. For example: the square frame of the pupil is recognized by using the trained target detection Yolov11 model, the square frame with a confidence greater than 0.9 in the model inference result is extracted, the pupil is embedded in the square frame, and the horizontal and vertical coordinates of the pupil center are calculated by averaging the horizontal and vertical coordinates of the upper left corner and the lower right corner of the frame to obtain the pupil center coordinate. The data set for training the Yolov11 model can come from 300 infrared pupil images artificially labeled by using the infrared camera.

[0053] S2, collect the first input information of the user wearing the corrective trial lens when performing the visual task, and correct the deviation of the pupil center coordinates in the first input information caused by the optical refraction of the corrective trial lens to obtain the corrected first input information.

[0054] Since in this step, the flat trial lens with negligible refraction effect is replaced by the corrective trial lens with greater refraction effect, and even the corrective trial lens can be a multi-piece superposition, for example, including a near vision trial lens, an astigmatism corrective trial lens and a progressive trial lens configured according to the actual vision of the user, therefore, the deviation caused by the refraction effect of the corrective trial lens between the infrared camera and the pupil on the pupil image of the user obtained by the infrared camera needs to be corrected to obtain the accurate pupil center coordinates.

[0055] The correction method for correcting the deviation of the pupil center coordinates in the first input information caused by the optical refraction of the corrective trial lens can be realized by various existing technologies, and one of the examples provided herein is as follows:

[0056] First, a relationship between the pixel size and the actual size in the pupil image of the user is established, that is, the pupil image is calibrated. The specific method is to find the reference distance in the image, calculate the pixel value corresponding to the reference distance, and thereby calculate the corresponding relationship between the pixel and the actual distance under this structure. The reference distance refers to a unit that can measure the length, which can be an eye-approaching component on the trial frame or a scale bar placed near the eye in the field of view of the infrared camera. For example, taking the 12mm camera angle near the eye on the trial frame as the reference distance, the corresponding pixel value is 162.78px, and then the corresponding relationship between the pixel size and the actual size in the pupil image is 13.6px / mm.

[0057] Then, the optical path of the pupil, the lens and the camera is modeled in the optical simulation software. The model takes the pupil as a point light source, and the distance between the pupil and the optical center of the first lens is the interpupillary distance of the lens wearer. The parameters of the modeled lens include the surface curvature and the refractive index of the optical material, which are derived from the lens parameters provided by the supplier. The distance between the two lenses is determined by the size of the trial frame. The distance between the last lens and the camera is measured mechanically, and the camera is modeled as an aperture. Finally, the virtual image position coordinates of the pupil are obtained by the fast focusing of the software, and the x and y direction coordinates of the virtual image position are read out to obtain the offset of the actual size of the pupil center in the x and y directions. According to the corresponding relationship between the pixel size and the actual size in the pupil image, the pixel size offset of the pupil center in the x and y directions is calculated to determine the correction amount of the pupil center position. For example, before the lens wearer performs the viewing task, a -1.00D myopia negative lens trial piece for correcting myopia and an ADD+1.00 progressive trial piece are placed on the trial frame for the user. With the pupil position as the three-dimensional space position coordinate origin (0mm, 0mm, 0mm), the optical simulation calculates the three-dimensional position coordinates of the pupil position under the influence of the light deflection of the structure of the two lenses as (0.09mm, -0.17mm, 3.23mm); in the corresponding relationship between the pixel size and the actual size in the pupil image is 13.6px / mm, then the pupil center coordinates in the x direction is -1.2px, and in the y direction is +2.3px. When predicting the coordinates of the viewing point on the lens, the coordinates of the pupil center should be corrected for the influence of refraction. For example, in a frame of pupil image in the process, the pupil center coordinates recorded by the infrared camera are (175, 125), which are the center coordinates of the virtual image of the pupil after deflection, and the center coordinates of the real pupil should be (176.2, 122.7). The corrected center coordinates of the real pupil are brought into the prediction model to calculate the viewing point position on the lens during the viewing process.

[0058] In this step, the lens wearer performs the viewing task while wearing the corrective trial lens without restrictions on the user's posture.

[0059] The viewing task includes the following steps performed in sequence:

[0060] The far-near switching measurement task includes: first viewing a circular stimulus paradigm (i.e. viewing target, the same below) with a radius of 3 cm displayed on the far display screen; then viewing a circular stimulus paradigm with a radius of 1 cm displayed on the near display screen; at this time, the near display screen is held by the lens wearer or placed on the table;

[0061] The far zone measurement task includes: viewing the far display screen, on which a circular stimulus paradigm with an initial radius of 60 cm and increasing by 5 cm each time is displayed, until the lens wearer needs to adjust his posture significantly and stops;

[0062] The transitional zone measurement task includes: watching a middle-distance display screen on which a circular stimulation paradigm with a radius of 30 cm initially and increasing by 2 cm each time is displayed until the spectacle user needs to obviously adjust the posture to stop;

[0063] The near zone measurement task includes: watching a near-distance display screen on which a circular stimulation paradigm with a radius of 20 cm initially and increasing by 1 cm each time is displayed until the spectacle user needs to obviously adjust the posture to stop; at this time, the near-distance display screen is held by the spectacle user.

[0064] S3, input the corrected first input information into the lens view point coordinate prediction model dedicated to the spectacle user, and calculate the corresponding lens view point coordinate through the lens view point coordinate prediction model;

[0065] Since the first input information of S2 is corrected to eliminate the deviation caused by the optical refraction of the corrective trial lens, and the execution of the look task in the collection process of S2 simulates the daily eye habits of the spectacle user, the lens view point coordinate calculated by the lens view point coordinate prediction model through the corrected first input information is accurate and consistent with the daily eye habits of the spectacle user.

[0066] S4, based on the lens view point coordinate obtained in S3, assist in dividing the lens function area of the lens actually worn by the spectacle user.

[0067] Precise division of the function area of the lens, and assistance in personalized selection or customization of the lens of the spectacle user are the ultimate application purposes of the present application.

[0068] Based on the lens view point coordinate obtained in S3, a corresponding view point distribution map can be generated, so as to divide the lens function area of the lens actually worn by the spectacle user. The three-dimensional model system can be used to directly visualize the lens function area division result to the user or the lens processing party, and the head of the user and the frame and lens can also be visualized in the three-dimensional model, so as to facilitate the spectacle user to intuitively preview the selection effect. How the three-dimensional model system models and visualizes the lens function area division result has corresponding solutions in the prior art, and will not be described herein.

[0069] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method of dividing a functional area of a progressive lens, characterized in that, Comprising the following steps: S1, establishing a lens view point coordinate prediction model exclusive to the lens fitting user, the lens view point coordinate prediction model is based on the condition that the lens fitting user wears a see-through trial lens, and through the lens view point coordinate prediction model, the prediction result of the lens view point coordinate of the corresponding side lens can be calculated after the first input information including the pupil center coordinate of the lens fitting user's one eye, the interpupillary distance, the lens plate distance, and the look target coordinate is obtained and input; S2, collecting the first input information of the lens fitting user when performing the look task while wearing the corrective trial lens, and correcting the deviation of the pupil center coordinate in the first input information caused by the optical refraction of the corrective trial lens to obtain the corrected first input information; S3, inputting the corrected first input information into the lens view point coordinate prediction model exclusive to the lens fitting user, and calculating the corresponding lens view point coordinate through the lens view point coordinate prediction model; S4, based on the lens view point coordinate obtained in S3, assisting in dividing the lens function area of the lens actually worn by the lens fitting user; In S1, the establishment method of the lens view point coordinate prediction model comprises the following steps: S11, positioning and fixing the head of the lens fitting user to form a first posture, the forming method of the first posture comprises: limiting the head of the lens fitting user on a medical headrest, first roughly adjusting the horizontal position and vertical position of the medical headrest, so that the pupil center of the one eye of the lens fitting user is aligned with the center calibration point among the nine calibration points on the calibration board; then wearing a trial frame on the lens fitting user, first placing a pinhole trial lens in the lens frame corresponding to the eye on the trial frame, the pinhole diameter is 1.5mm, and the horizontal position and vertical position of the medical headrest are finely adjusted until the pupil of the eye of the lens fitting user is directly opposite the pinhole of the pinhole trial lens and the center calibration point of the calibration board is observed through the pinhole; then keeping the head of the lens fitting user fixed to form the first posture; S12, replacing the pinhole trial lens with a plain trial lens, and lighting the nine calibration points on the calibration board in turn; wherein, each time one of the calibration points is lit, the pupil center of the eye of the lens fitting user is turned to and fixated on the calibration point, and the first input information corresponding to the calibration point is measured, the first input information includes the pupil center coordinate of the eye, the calibration point coordinate, the interpupillary distance, the lens plate distance, and the lens view point coordinate corresponding to the calibration point is calculated through the first input information, and a prediction model of the functional mapping relationship between the first input information and the lens view point coordinate is formed through fitting, that is, through the lens view point coordinate prediction model, the prediction result of the lens view point coordinate of the corresponding side lens can be calculated after the first input information including the pupil center coordinate of the lens fitting user's one eye, the interpupillary distance, the lens plate distance, and the look target coordinate is obtained and input; The "calculating the lens view point coordinate corresponding to the calibration point through the first input information" is specifically: measuring the eye-lens distance a, the lens plate distance b, and the coordinate of the center calibration point (0 cm, 0 cm); the coordinate of the calibration point on the calibration plate is (x, y), and the corresponding coordinate (x * ,y * ) on the lens is calculated according to the similar triangle principle according to the following formula: The method for establishing the function mapping relationship in the calculation of the lens view point coordinate corresponding to the calibration point by the first input information is specifically as follows: a six-parameter binary quadratic regression function is used to perform least square fitting on the relationship between the pupil center coordinates (x , y * ) and the corresponding coordinates (x * , y * ) of the calibration point on the lens, and the obtained fitting parameters (a0, a1, a2, a3, a4, a5) and (b0, b1, b2, b3, b4, b5) are saved as a prediction model. * , y * ) and the corresponding coordinates (x , y * ) of the calibration point on the lens, and the obtained fitting parameters (a0, a1, a2, a3, a4, a5) and (b0, b1, b2, b3, b4, b5) are saved as a prediction model.

2. The method of claim 1, wherein, In S2, the lens fitting user does not limit the user's posture when performing the look task while wearing the corrective trial lens.

3. The method of claim 1, wherein the functional zones of the progressive lens are divided into a first zone, a second zone, a third zone, a fourth zone, and a fifth zone. In S2, the look task includes the following steps performed in turn: Distance-near switch test, which includes: first watching a 3 cm radius circle stimulus displayed on the far display screen; then watching a 1 cm radius circle stimulus displayed on the near display screen; the near display screen is held by the wearer or placed on the table at this time; Distance zone test, which includes: watching the far display screen on which a circle stimulus with an initial radius of 60 cm and increasing by 5 cm each time is displayed until the wearer needs to adjust the posture obviously; Transition zone test, which includes: watching the intermediate display screen on which a circle stimulus with an initial radius of 30 cm and increasing by 2 cm each time is displayed until the wearer needs to adjust the posture obviously; Near zone test, which includes: watching the near display screen on which a circle stimulus with an initial radius of 20 cm and increasing by 1 cm each time is displayed until the wearer needs to adjust the posture obviously; the near display screen is held by the wearer at this time.

4. The method for dividing the functional area of ​​a progressive lens as described in claim 3, characterized in that, The far display screen used in the viewing task is vertically placed 3 m in front of the wearer, and the screen display surface faces the wearer, with a screen display area of 1.16 m in length and 0.89 m in height.

5. The method of claim 3, wherein the functional zones of the progressive lens are divided into a first zone, a second zone, a third zone, a fourth zone, and a fifth zone, and the first zone is divided into a first sub-zone and a second sub-zone. The intermediate display screen used in the viewing task is vertically placed 50 cm in front of the wearer, and the screen display surface faces the wearer, with a screen display area of 16 inches, and a screen aspect ratio of 4:3 or 16:

9.

6. The method of claim 3, wherein the functional zones of the progressive lens are divided into a first zone, a second zone, a third zone, a fourth zone, and a fifth zone, and the first zone is divided into a first sub-zone and a second sub-zone. The near display screen used in the viewing task is placed 30 cm in front of the wearer, with a screen display area of 14 inches, and a screen aspect ratio of 4:3 or 16:9.

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