Progressive lens function region division method

Abstract

The invention provides a progressive lens function region division method. The progressive lens function region division method comprises the following steps: establishing an exclusive lens viewpoint coordinate prediction model for a lens matching user; the method comprises the following steps: acquiring first input information when a user wearing the correction try-on lens executes a watching task, and correcting deviation of pupil center coordinates in the first input information caused by optical refraction of the correction try-on lens; inputting the corrected first input information into a special lens viewpoint coordinate prediction model of the user; calculating through the lens viewpoint coordinate prediction model to obtain corresponding lens viewpoint coordinates; based on the obtained lens viewpoint coordinates, lens function area division is carried out on the lens actually worn by the lens matching user in an auxiliary mode. According to the invention, the problem of lack of personalized parameters in conventional fitting is improved; the invention provides a corresponding compensation and correction method for solving the problem that tracking of viewpoints on lenses is affected due to deviation of pupil positions recorded by a camera and actual pupil positions caused by optical refraction of the lenses after a plurality of try-on lenses are overlapped.

Description

Technical Field

[0001] The present invention relates to the technical field of diagnostic identification for determining a person's viewpoint for vision correction and progressive lens fitting. The IPC belongs to A61B and can enable the fitting of progressive lenses based on the wearer's personalized eye habits, providing users of progressive lenses with a more comfortable and natural visual experience. Background Art

[0002] Adult progressive multifocal lenses achieve a gradual evolution of near-field attachment from top to bottom on a single lens. By adding light for close-up reading, the adjustment required for reading is eliminated or reduced, and the light intensity gradually decreases from the far light zone to the near light zone, gradually and continuously increasing the refractive power of the lens from the far light zone at the top of the lens until the required near diopter is reached in the near light zone at the bottom of the lens. Progressive lenses provide a gradually evolving visual space from far to medium distance and then to near distance, offering the wearer continuous, clear vision from far to near. A single pair of lenses can address both long-distance and near vision problems, making them the preferred correction method for presbyopia wearers.

[0003] Progressive addition lenses provide a natural, convenient, and comfortable correction method for presbyopic patients, but there are currently many problems with the fitting of progressive addition lenses. First, there are many fitting parameters, and the accuracy of the relevant parameters is closely related to the fitting comfort; the current fitting process lacks consideration of personalized parameters, which ultimately leads to poor fitting comfort. Therefore, when fitting progressive addition lenses, it is necessary to accurately measure traditional factors such as pupil distance, degree of hyperopia and myopia, etc., and also to consider personalized factors, such as the wearer's personalized eye habits, to ensure that different users have a clear field of vision in different commonly used areas. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides the following technical solutions:

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

[0006] S1. Establishing a lens viewpoint coordinate prediction model exclusive to the user wearing the glasses. The lens viewpoint coordinate prediction model is based on the condition that the user wears the plano-vision trial lenses. The lens viewpoint coordinate prediction model can calculate the lens viewpoint coordinate prediction result of the corresponding lens lens after obtaining and inputting first input information including the pupil center coordinates of one eye of the user, the lens-to-eye distance, the lens-plate distance, and the viewing target coordinates;

[0007] S2. collecting first input information of the user performing a vision task while wearing corrective trial lenses, and correcting deviations of pupil center coordinates in the first input information caused by optical refraction of the corrective trial lenses to obtain corrected first input information;

[0008] S3, inputting the corrected first input information into a lens viewpoint coordinate prediction model exclusive to the user wearing the glasses, and calculating corresponding lens viewpoint coordinates through the lens viewpoint coordinate prediction model;

[0009] S4. Based on the lens viewpoint coordinates obtained in S3, the user is assisted in dividing the lens functional areas according to the actual lens worn by the user.

[0010] Furthermore, in S1, the method for establishing the lens viewpoint coordinate prediction model includes the following steps:

[0011] S11. Positioning and fixing the head of the user wearing the glasses to form a first posture, wherein the method for forming the first posture comprises: restraining the head of the user wearing the glasses on a medical head support, first roughly adjusting the horizontal and vertical positions of the medical head support so that the center of the pupil of one eye of the user wears the glasses is aligned with the central calibration point located at the center of the nine calibration points on the calibration plate; then having the user wear the glasses wear a trial frame, first placing a pinhole trial lens with a pinhole diameter of 1.5 mm in the lens frame corresponding to the eye of the user on the trial frame, and finely adjusting the horizontal and vertical positions of the medical head support until the pupil of the eye of the user wears the glasses is aligned with the pinhole of the pinhole trial lens and the illuminated central calibration point of the calibration plate is visible through the pinhole; and then keeping the head of the user wearing the glasses fixed to form the first posture;

[0012] S12. Replace the pinhole trial lens with a plano trial lens, and light up the nine calibration points on the calibration plate in sequence; wherein, each time one of the calibration points is lit up, the pupil center of the eye on the side of the user wearing the glasses is turned to and gaze at the calibration point, and the first input information corresponding to the calibration point is measured, the first input information including the pupil center coordinates of the eye, the calibration point coordinates, the lens-to-eye distance, and the lens-plate distance, and the lens viewpoint coordinates corresponding to the calibration point are calculated based on the first input information, and a prediction model of a functional mapping relationship between the first input information and the lens viewpoint coordinates is formed through fitting, 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, the lens-to-eye distance, the lens-plate distance, and the viewing target coordinates of the eye on one side of the user wearing the glasses.

[0013] Furthermore, in S2, when the user wearing the corrective trial lenses performs the vision task, no restrictions are placed on the user's posture.

[0014] Furthermore, in S2, the viewing task includes executing in sequence:

[0015] The near-far switching task involves first viewing a circular stimulus with a radius of 3 cm on a far-distance display, and then viewing a circular stimulus with a radius of 1 cm on a near-distance display. The near-distance display is held by the wearer or placed on a table.

[0016] The distance zone measurement task includes: viewing a distance display screen on which a circular stimulus paradigm with an initial radius of 60 cm and gradually increasing by 5 cm is displayed until the user needs to adjust their posture significantly;

[0017] The transition zone measurement task involves viewing a mid-range display screen that displays a circular stimulus with an initial radius of 30 cm and gradually increasing by 2 cm until the user needs to adjust their posture significantly.

[0018] The near zone measurement task includes: viewing a near-range display screen on which a circular stimulus paradigm with an initial radius of 20 cm and gradually increasing by 1 cm is displayed until the user wearing glasses needs to obviously adjust their posture to stop; at this time, the near-range display screen is held by the user wearing glasses.

[0019] Furthermore, the remote display screen used in the viewing task is placed vertically at a distance of 3 meters in front of the user wearing glasses, with the screen display surface facing the user, and the screen display area is 1.16 meters long and 0.89 meters high.

[0020] Furthermore, the mid-distance display screen used in the viewing task is placed vertically at a distance of 50 cm in front of the user wearing glasses with the screen display surface facing the user wearing glasses, the screen display area is 16 inches, and the screen aspect ratio is 4:3 or 16:9.

[0021] Furthermore, the near-distance display screen used in the viewing task is placed 30 cm in front of the user wearing glasses, has a screen display area of 14 inches, and a screen aspect ratio of 4:3 or 16:9.

[0022] The beneficial effects of the present invention are as follows: Based on the conventional fitting process, the present invention uses the technical means of tracking the viewpoint on the lens to collect the eye habits of the wearer, accurately divide the functional areas of the lens, and improve the problem of lack of personalized parameters in conventional fitting; in order to solve the problem that after multiple trial lenses are superimposed in the progressive lens fitting process, the optical refraction of the lenses causes the deviation between the pupil position recorded by the camera and the actual pupil position, which affects the tracking of the viewpoint on the lens, a corresponding compensation correction method is proposed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings that constitute part of the present invention are used to provide further understanding of the present invention. The schematic embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without making any creative efforts.

[0024] Figure 1 This is a schematic diagram of the assembly structure of the fitting frame and the infrared camera thereon used in the present invention;

[0025] Figure 2 Schematic diagram of the relative positions of the display screens used in the stimulation paradigm of the present invention;

[0026] Figure 3 It is the main flow chart of the present invention. DETAILED DESCRIPTION

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

[0028] The hardware devices used in this invention include:

[0029] like Figure 1 The trial-fitting frame shown here is short for a trial-fitting frame. Two infrared cameras 2 are fixed to its frame body 1. The two infrared cameras face and capture the left and right pupils of the user, respectively, to obtain pupil images of the user. Specifically, each infrared camera is fixed to the front side of the lens frame on the corresponding side of the trial-fitting frame body via a support leg, and the side lens frame is located between the user's pupil on the same side and the infrared camera lens. That is, the infrared camera on that side can capture an image of the user's pupil on that side behind the inner area of the lens frame on that side. For example, the infrared camera 2 for capturing the right pupil is fixed to the front right side of the right lens frame of the trial-fitting frame body via a support leg to avoid affecting the user's forward line of sight. It can also capture an image of the user's right pupil behind the inner area of the right lens frame 11. Furthermore, each infrared camera has a sampling frequency of 120Hz and a resolution of 720P.

[0030] Preferably, it also includes a near-infrared illumination source 3, which is fixed on the fitting frame body 1 and is used for illuminating the field of view. Furthermore, the operating wavelength of the near-infrared illumination source is 940nm.

[0031] The calibration board is provided with nine calibration points arranged in a nine-square format, and the nine calibration points can be lit and extinguished in sequence. Preferably, the calibration points are LED lights.

[0032] Stimulus paradigm display, combined with Figure 2 As shown, there are three types of electronic display screens connected to the processing host, which are used to play and display the stimulation paradigm content corresponding to the viewing task.

[0033] A remote display screen 4 is placed vertically at a distance of 3 meters in front of the user wearing glasses, with the screen display surface facing the user, and the screen display area is 1.16 meters long and 0.89 meters high; the stimulation paradigm content corresponding to the remote viewpoint acquisition task is displayed on it; preferably, the remote display screen is a large-screen flat-screen TV to simulate the eye use scenario of the user wearing glasses watching TV during daily leisure time.

[0034] The medium-distance display screen 5 is placed vertically at a distance of 50 cm in front of the user wearing glasses and the screen display surface faces the user wearing glasses. The screen display area is 16 inches and the screen aspect ratio is 4:3 or 16:9; the stimulation paradigm content corresponding to the medium-distance viewpoint acquisition task is displayed on it; preferably, the medium-distance display screen is a desktop computer monitor to simulate the eye use scenario of the user wearing glasses watching the desktop computer monitor during daily office work.

[0035] A close-range display screen 6 is horizontally placed at a distance of 30 cm in front of the user wearing glasses with the screen display facing upwards, with a screen display area of 14 inches and a screen aspect ratio of 4:3 or 16:9; displayed thereon is the stimulation paradigm content corresponding to the close-range viewpoint acquisition task; preferably, the close-range display screen is a tablet computer, which is held by the user wearing glasses when performing the close-range viewpoint acquisition task, so as to simulate the eye use scenario of the user wearing glasses holding and watching the screen display content of an electronic device (tablet computer, mobile phone, etc.) or the content of a book in daily life.

[0036] Among them, 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 screen height 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 middle-distance display screen; at the same time, the height of the lower edge of the screen of the middle-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 middle-distance display screen is lower than the height of the upper edge of the screen of the far-distance display screen.

[0037] like Figure 3 As shown, the method of the present invention comprises:

[0038] S1. Establishing a lens viewpoint coordinate prediction model exclusive to the user wearing the glasses. The lens viewpoint coordinate prediction model is based on the condition that the user wears the plano-vision trial lenses. The lens viewpoint coordinate prediction model can calculate the lens viewpoint coordinate prediction result of the corresponding lens lens after obtaining and inputting first input information including the pupil center coordinates of one eye of the user, the lens-to-eye distance, the lens-plate distance, and the viewing target coordinates;

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

[0040] The eye-to-eye distance is the distance between the center of the lens and the center of the pupil of the wearer;

[0041] The visual target is a target highlighted on the display panel for the pupil of the user to focus on. It can be a dot or block target.

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

[0043] S11. Positioning and fixing the head of the user wearing glasses to form a first posture, wherein the method for forming the first posture comprises: restraining the head of the user wearing glasses on the medical head support, first roughly adjusting the horizontal and vertical positions of the medical head support so that the center of the pupil of one eye of the user wearing glasses (such as the right eye) is aligned with the central calibration point located at the center of the nine calibration points on the calibration plate; then having the user wearing glasses wear a trial frame, first placing a pinhole trial lens with a pinhole diameter of 1.5 mm in the lens frame 11 corresponding to the eye of the trial frame, and finely adjusting the horizontal and vertical positions of the medical head support until the pupil of the eye of the user wearing glasses is aligned with the pinhole of the pinhole trial lens and the illuminated central calibration point of the calibration plate (display panel) is observed through the pinhole; and then keeping the head of the user wearing glasses 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 board (display board); each time a calibration point is illuminated, the pupil center of the user's eye on that side is directed to and gazes at that calibration point, and the first input information corresponding to the calibration point (visual target) is measured. The first input information includes the coordinates of the pupil center of the eye. The coordinates of the calibration point (i.e., the coordinates of the viewing target) (x, y), the lens-to-eye distance a, and the lens-plate distance b are calculated based on the first input information to obtain the viewpoint coordinates of the lens corresponding to the calibration point (viewing target), and a prediction model is formed through fitting to form a functional mapping relationship between the first input information and the lens viewpoint coordinates, that is, the lens viewpoint coordinate prediction model can calculate the prediction result of the lens viewpoint coordinates of the corresponding lens after obtaining and inputting the first input information including the pupil center coordinates of one eye of the glasses user, the lens-to-eye distance, the lens-plate distance, and the view target coordinates;

[0045] The lens in the lens plate distance in this step is a plano trial lens, the lens center is the lens center of the plano trial lens, the display board is a calibration board, and the center of the display board is the center calibration point of the calibration board; the lens in the lens eye distance is a plano trial lens, the lens center is the lens center of the plano trial lens; the visual target is the lit calibration point on the calibration board;

[0046] The "calculating the lens viewpoint coordinates corresponding to the calibration point (looking at the target) by the first input information" can be achieved by a variety of existing technologies. This application provides one of the embodiments as follows: the lens-to-eye distance is measured to be a, the lens-plate distance is b, and the coordinates of the center calibration point are (0cm, 0cm). The coordinates of the calibration point on the calibration plate are (x, y), and the corresponding coordinates on the lens (x * ,y * ) is calculated according to the following formula based on the principle of similar triangles.

[0047]

[0048] The method for establishing the function mapping relationship in the "prediction model for forming the function mapping relationship between the first input information and the lens viewpoint coordinates by fitting" can be implemented by a variety of existing technologies. This application provides one of the embodiments as follows: a six-parameter binary quadratic regression function is used to calculate the pupil center coordinates. The corresponding coordinates of the calibration point on the lens (x * ,y * ) are fitted by the least squares method, 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] Among them, the functional form of the six-parameter binary quadratic regression function can be the following:

[0050]

[0051] The same process is repeated for the left eye to obtain the corresponding content of the left eye lens viewpoint coordinate prediction model, which will not be described in detail in this article.

[0052] The acquisition method of the first input information such as pupil center coordinates, lens-to-eye distance, lens plate distance, and viewing target coordinates in the present invention can be realized by a variety of existing technologies. For example, the pupil center coordinates can be obtained by capturing the pupil image of the user wearing glasses using an infrared camera fixed to the aforementioned fitting frame. Under the premise of knowing the distance, angle, three-dimensional coordinates and other information between the infrared camera and the fitting frame and the pupil of the user's ipsilateral eye, the pupil center coordinates can be obtained using information such as the pupil center pixel size and position in the image. For example: a trained target detection Yolov11 model is used to perform inference to identify the square frame of the pupil, extract the square frame with a confidence level greater than 0.9 in the model inference result, and the pupil is embedded in the square frame. The horizontal and vertical coordinates of the upper left corner and lower right corner of the frame are respectively averaged to calculate the horizontal and vertical coordinates of the pupil center, i.e., the pupil center coordinates. The dataset used to train the Yolov11 model can come from 300 manually labeled infrared pupil images taken with the infrared camera.

[0053] S2. Collecting first input information of the user wearing corrective trial lenses while performing a vision task, and correcting the deviation of the pupil center coordinates in the first input information caused by the optical refraction of the corrective trial lenses to obtain corrected first input information.

[0054] Since in this step, the plano trial lenses with negligible refractive effects are replaced with corrective trial lenses with greater refractive effects, and even the corrective trial lenses may be multiple lenses superimposed, for example, including myopia trial lenses, astigmatism correction trial lenses and progressive trial lenses configured and superimposed according to the actual vision of the user, therefore, the deviation caused by the refractive effect of the corrective trial lenses located between the infrared camera and the pupil on the pupil image of the user obtained by the infrared camera needs to be corrected in order to obtain the accurate pupil center coordinates.

[0055] The correction method for correcting the deviation of the pupil center coordinate in the first input information caused by the optical refraction of the corrective trial lens can be implemented by various existing technologies. An example is provided as follows:

[0056] First, a relationship is established between the pixel size in the pupil image of the user wearing glasses and the actual size, which is to calibrate the pupil image. The specific method is to find the reference distance in the image, calculate the pixel value corresponding to this reference distance, and thus calculate the correspondence between the pixel and the actual distance under this structure. The reference distance refers to a unit that can be measured in length. It can be a part close to the eye on the fitting frame, or a scale bar artificially placed close to the eye within the field of view of the infrared camera. For example, the 12mm frame angle close to the eye captured by the camera on the fitting frame is used as the reference distance, and its corresponding pixel value is 162.78px. Then, the correspondence between the pixel size and the actual size in the pupil image is 13.6px / mm.

[0057] Then, the optical path of the pupil, lens, and camera is modeled in optical simulation software. The model treats the pupil as a point light source, with the distance from the pupil to the optical center of the first lens as the user's eye-to-eye distance. Modeled lens parameters, including surface curvature and the refractive index of the optical material, are derived from lens specifications provided by the supplier. The distance between the two lenses is determined by the dimensions of the fitting frame. The distance from the last lens to the camera is mechanically measured, and the camera is modeled as an aperture. Finally, the software uses fast focusing to determine the position coordinates of the pupil's virtual image. The x and y coordinates of the virtual image are read out to determine the x and y offsets of the pupil center from its actual dimensions. Based on the correspondence between the pixel size in the pupil image and its actual dimensions, the x and y offsets of the pupil center are calculated to determine the correction for the pupil center position. For example, before the user begins a visual task, a -1.00D myopia minus spherical trial lens and a +1.00 ADD progressive lens are placed in the fitting frame. Taking the pupil position as the origin of the three-dimensional coordinate system (0mm, 0mm, 0mm), optical simulation calculates the three-dimensional coordinates of the pupil under the influence of light deflection caused by the two-lens structure to be (0.09mm, -0.17mm, 3.23mm). In this pupil image, the correspondence between pixel size and actual size is 13.6px / mm, so the pupil center coordinates are -1.2px in the x-direction and +2.3px in the y-direction. When predicting the viewpoint coordinates on the lens, the pupil center coordinates should be corrected for the effects of refraction. For example, in a certain frame of the pupil image during the process, the pupil center coordinates recorded by the infrared camera are (175, 125). These are the center coordinates of the virtual pupil image captured after deflection. The actual pupil center coordinates should be (176.2, 122.7). The corrected actual pupil center coordinates are then substituted into the prediction model to calculate the viewpoint position on the lens during vision.

[0058] In this step, when the user wearing the corrective trial lenses performs the vision task, there is no restriction on the user's posture.

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

[0060] The near-far switching task involves first viewing a 3cm radius circular stimulus on a far-distance display (i.e., viewing the visual target, the same applies below); then viewing a 1cm radius circular stimulus on a near-distance display; the near-distance display is held by the wearer or placed on a table.

[0061] The distance zone measurement task includes: viewing a distance display screen on which a circular stimulus paradigm with an initial radius of 60 cm and gradually increasing by 5 cm is displayed until the user needs to adjust their posture significantly;

[0062] The transition zone measurement task involves viewing a mid-range display screen that displays a circular stimulus with an initial radius of 30 cm and gradually increasing by 2 cm until the user needs to adjust their posture significantly.

[0063] The near zone measurement task includes: viewing a near-range display screen on which a circular stimulus paradigm with an initial radius of 20 cm and gradually increasing by 1 cm is displayed until the user wearing glasses needs to obviously adjust their posture to stop; at this time, the near-range display screen is held by the user wearing glasses.

[0064] S3, inputting the corrected first input information into a lens viewpoint coordinate prediction model exclusive to the user wearing the glasses, and calculating corresponding lens viewpoint coordinates through the lens viewpoint coordinate prediction model;

[0065] Since the first input information of S2 has been corrected to eliminate the deviation caused by the optical refraction of the corrective trial lens, and the viewing task performed by the S2 acquisition process simulates the daily eye habits of the user wearing glasses, the lens viewpoint coordinates calculated by the lens viewpoint coordinate prediction model through the corrected first input information are accurate and consistent with the daily eye habits of the user wearing glasses.

[0066] S4. Based on the lens viewpoint coordinates obtained in S3, the user is assisted in dividing the lens functional areas according to the actual lens worn by the user.

[0067] The ultimate application purpose of the present invention is to accurately divide the functional areas of the lens and assist users in selecting or customizing personalized progressive lenses.

[0068] Based on the lens viewpoint coordinates obtained by S3, a corresponding viewpoint distribution map can be generated, thereby dividing the functional areas of the lenses actually worn by the user. The three-dimensional model system can be used to directly visualize the lens functional area division results and present them to the user or lens manufacturer. The user's head, frame, and lenses can also be visualized in the three-dimensional model, allowing the user to intuitively preview the matching effect. The existing technology already has corresponding solutions for how the three-dimensional model system can be used to model and display the lens functional area division results, and this article will not elaborate on them.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for dividing functional areas of progressive lenses, characterized in that: The steps include: S1. Establishing a lens viewpoint coordinate prediction model exclusive to the user wearing the glasses. The lens viewpoint coordinate prediction model is based on the condition that the user wears the plano-vision trial lenses. The lens viewpoint coordinate prediction model can calculate the lens viewpoint coordinate prediction result of the corresponding lens lens after obtaining and inputting first input information including the pupil center coordinates of one eye of the user, the lens-to-eye distance, the lens-plate distance, and the viewing target coordinates; S2. collecting first input information of the user performing a vision task while wearing corrective trial lenses, and correcting deviations of pupil center coordinates in the first input information caused by optical refraction of the corrective trial lenses to obtain corrected first input information; S3, inputting the corrected first input information into a lens viewpoint coordinate prediction model exclusive to the user wearing the glasses, and calculating corresponding lens viewpoint coordinates through the lens viewpoint coordinate prediction model; S4. Based on the lens viewpoint coordinates obtained in S3, the user is assisted in dividing the lens functional areas according to the actual lens worn by the user.

2. The method for dividing functional areas of a progressive lens according to claim 1, wherein: In S1, the method for establishing the lens viewpoint coordinate prediction model includes the following steps: S11. Positioning and fixing the head of the user wearing the glasses to form a first posture, wherein the method for forming the first posture comprises: restraining the head of the user wearing the glasses on a medical head support, first roughly adjusting the horizontal and vertical positions of the medical head support so that the center of the pupil of one eye of the user wears the glasses is aligned with the central calibration point located at the center of the nine calibration points on the calibration plate; then having the user wear the glasses wear a trial frame, first placing a pinhole trial lens with a pinhole diameter of 1.5 mm in the lens frame corresponding to the eye of the user on the trial frame, and finely adjusting the horizontal and vertical positions of the medical head support until the pupil of the eye of the user wears the glasses is aligned with the pinhole of the pinhole trial lens and the illuminated central calibration point of the calibration plate is visible through the pinhole; and then keeping the head of the user wearing the glasses fixed to form the first posture; S12. Replace the pinhole trial lens with a plano trial lens, and light up the nine calibration points on the calibration plate in sequence; wherein, each time one of the calibration points is lit up, the pupil center of the eye on the side of the user wearing the glasses is turned to and gaze at the calibration point, and the first input information corresponding to the calibration point is measured, the first input information including the pupil center coordinates of the eye, the calibration point coordinates, the lens-to-eye distance, and the lens-plate distance, and the lens viewpoint coordinates corresponding to the calibration point are calculated based on the first input information, and a prediction model of a functional mapping relationship between the first input information and the lens viewpoint coordinates is formed through fitting, 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, the lens-to-eye distance, the lens-plate distance, and the viewing target coordinates of the eye on one side of the user wearing the glasses.

3. The method for dividing functional areas of a progressive lens according to claim 1, wherein: In S2, when the user wearing the corrective trial lenses performs the vision task, there is no restriction on the user's posture.

4. The method for dividing functional areas of a progressive lens according to claim 1, wherein: In S2, the viewing task includes performing the following steps in sequence: The near-far switching task involves first viewing a circular stimulus with a radius of 3 cm on a far-distance display, and then viewing a circular stimulus with a radius of 1 cm on a near-distance display. The near-distance display is held by the wearer or placed on a table. The distance zone measurement task includes: viewing a distance display screen on which a circular stimulus paradigm with an initial radius of 60 cm and gradually increasing by 5 cm is displayed until the user needs to adjust their posture significantly; The transition zone measurement task involves viewing a mid-range display screen that displays a circular stimulus with an initial radius of 30 cm and gradually increasing by 2 cm until the user needs to adjust their posture significantly. The near zone measurement task includes: viewing a near-range display screen on which a circular stimulus paradigm with an initial radius of 20 cm and gradually increasing by 1 cm is displayed until the user wearing glasses needs to obviously adjust their posture to stop; at this time, the near-range display screen is held by the user wearing glasses.

5. The method for dividing functional areas of a progressive lens according to claim 4, wherein: The remote display screen used in the viewing task was placed vertically at a distance of 3 meters in front of the user with the glasses, with the screen display surface facing the user. The screen display area was 1.16 meters long and 0.89 meters high.

6. The method for dividing functional areas of a progressive lens according to claim 4, wherein: The mid-distance display screen used in the viewing task was placed vertically at a distance of 50 cm in front of the user with the screen facing the user. The screen display area was 16 inches and the screen aspect ratio was 4:3 or 16:

9.

7. The method for dividing functional areas of a progressive lens according to claim 4, wherein: The near-distance display screen used in the viewing task is placed 30 cm in front of the user wearing glasses, with a screen display area of 14 inches and a screen aspect ratio of 4:3 or 16:9.

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