Dynamic measurement device and method for binocular vision function

Abstract

The application provides a binocular visual function dynamic measurement device, comprising a movable target assembly, a binocular signal acquisition assembly and a controller. The controller is configured to control the target display device to continuously move; during the continuous movement of the target display device, real-time distance data, binocular visual axis angle data and pupil diameter data are synchronously recorded and stored with time as a label to obtain a three-dimensional time sequence related to the real-time distance data, the binocular visual axis angle data and the pupil diameter data; based on the three-dimensional time sequence, a time-domain synchronism quantization index of accommodation-vergence-miosis linkage is obtained; and based on the time-domain synchronism quantization index, an evaluation result of binocular visual function dynamic measurement is obtained. The device provided by the application realizes accurate quantitative detection of visual function, the detection result is consistent with the real physiological state, and is suitable for comprehensive detection and evaluation of binocular visual function in clinical ophthalmology and optometry center.

Description

Technical Field

[0001] This application relates to the field of visual function testing technology, specifically to a device and method for dynamic measurement of binocular visual function. Background Technology

[0002] Binocular vision function testing is a core component of optometry, vision rehabilitation, and ophthalmological diagnosis. It is primarily used to assess the physiological coordination functions of the human eye, such as accommodation, convergence, and fusion. Precise data on accommodation, convergence, eye position, and fusion are crucial for developing myopia control programs, presbyopic prescriptions, multi-point defocus lens fitting, and binocular vision abnormality training programs.

[0003] Currently, there are two fundamentally different systems for clinical testing of regulation and convergence functions: the negative mirror method and the proximity method.

[0004] The core principle of the negative lens method is to artificially alter the total refractive power of the eye's optical system by progressively adding negative (or positive) lenses in front of the eye, solely challenging the ciliary muscle's ability to contract and relax. Its independent variable is the lens power, and the accommodative trigger is the optical simulation of an object approaching; it lacks true convergence linkage. The negative lens method is suitable for assessing static optical performance such as overcorrection / undercorrection, plotting defocus curves, and measuring accommodative ability (AMP). However, the negative lens induction method relies on the optometrist's subjective occlusion judgment, resulting in a low testing frequency. Furthermore, traditional negative lens induction methods cannot achieve dynamic accommodation and convergence function measurements at continuous distances. The negative lens induction method is only performed at a fixed point at a distance; each addition of a negative lens requires interrupting the measurement and re-occlusion to assess eye position. The entire process is step-by-step and intermittent, only acquiring eye position data corresponding to two or three discrete accommodative stimulus points, failing to reflect the real-time linkage between accommodation and convergence during continuous fixation from far to near.

[0005] The core principle of the proximity test is to assess binocular vision by moving a visual target card closer to the subject from a distance and observing the subject's reaction. However, the proximity test cannot monitor the dynamic changes in eye position and pupil size in real time, cannot quantify them, and cannot monitor changes in pupil size. Furthermore, the human eye's accommodation-convergence-pupil constriction process is a coordinated physiological process that occurs at the millisecond level, and traditional testing methods cannot achieve accurate quantitative monitoring. Summary of the Invention

[0006] To at least partially address the aforementioned problems, according to one aspect of this application, embodiments of this application provide a binocular vision function dynamic measurement device, comprising:

[0007] The movable visual target assembly includes a driving device, a visual target display device, a linear guide rail, and a position sensor. The visual target display device is slidably mounted on the linear guide rail. The driving device can drive the visual target display device to move continuously in a straight line along the linear guide rail to continuously change the distance between the visual target display device and the eyes to be tested. The position sensor is used to acquire real-time distance data between the visual target display device and the eyes to be tested.

[0008] The binocular signal acquisition component is used to synchronously acquire data on the visual axis angle and pupil diameter of the two eyes under test in real time during the continuous movement of the optotype display device.

[0009] The controller is communicatively connected to the movable visual target assembly and the binocular signal acquisition assembly; wherein,

[0010] The controller is configured as follows:

[0011] Control the continuous movement of the target display device;

[0012] During the continuous movement of the visual target display device, real-time distance data, binocular visual axis angle data, and pupil diameter data are recorded and stored synchronously with time as the label, so as to obtain a three-dimensional time series related to the real-time distance data, binocular visual axis angle data, and pupil diameter data.

[0013] Based on three-dimensional time series, a quantitative index of temporal synchronicity of the three-linkage of adjustment-convergence-pupil constriction was obtained;

[0014] Based on the time-domain synchronicity quantification index, the evaluation results of dynamic measurement of binocular vision function are obtained.

[0015] In some embodiments, based on a three-dimensional time series, a quantitative index of the temporal synchronicity of the accommodation-convergence-constriction three-linkage is obtained, including:

[0016] The amount of modulated stimulus is obtained based on real-time distance data and time.

[0017] The ensemble response was obtained based on the binocular visual axis angle data and time.

[0018] The amount of pupillary constriction response was obtained based on pupil diameter data and time.

[0019] The temporal synchronization relationship among the accommodative stimulus, convergence response, and miosis response was fitted to obtain a quantitative index of the temporal synchronization of the three-linkage regulation-convergence-miosis.

[0020] In some embodiments, obtaining the modulated stimulus amount based on real-time distance data and time includes:

[0021] AS(t) = 1 / d(t), where AS(t) is the amount of conditioning stimulus at time t, and d(t) is the real-time distance data between the optotype display device and the eyes to be tested at time t;

[0022] The convergence response was obtained based on binocular visual axis angle data and time, including:

[0023] CR(t) = α(t) / PD, where CR(t) is the ensemble response at time t, α(t) is the angle between the visual axes of the two eyes at time t, and PD is the interpupillary distance of the two eyes to be tested under zero accommodation baseline conditions;

[0024] The amount of pupillary constriction response was obtained based on pupil diameter data and time, including:

[0025] PR(t) = p(t0) - p(t), where PR(t) is the pupillary constriction response at time t relative to the distant reference time t0, p(t) is the pupil diameter at time t, and p(t0) is the pupil diameter at zero accommodation baseline.

[0026] In some embodiments, the temporal synchronization relationship among the accommodative stimulus, convergence response, and miosis response is fitted to obtain a quantitative index of the temporal synchronicity of the accommodation-convergence-miosis three-way linkage, including:

[0027] By performing time-domain correlation analysis on three-dimensional data (AS(t), CR(t), PR(t)) over a continuous time series, the adjustment reaction time, convergence reaction time, and pupillary constriction reaction time are calculated, and the phase difference between any two of the three is determined; among them,

[0028] The accommodative response time is the time interval from the moment the target display device initiates displacement until the correlation coefficient between the accommodative stimulus amount and the actual measured change in refractive power first exceeds a first preset threshold.

[0029] The aggregate reaction time is the time interval from the moment the target display device starts displacement until the rate of change of the aggregate reaction quantity first exceeds the second preset threshold.

[0030] The pupillary constriction response time is the time interval from the moment the target display device starts displacement until the rate of pupil diameter reduction first exceeds the third preset threshold.

[0031] The first preset threshold, the second preset threshold, and the third preset threshold are determined based on empirical values.

[0032] In some embodiments, calculating the accommodation reaction time, convergence reaction time, and pupillary constriction reaction time, and determining the phase difference between any two of the three, includes:

[0033] Adjustment-collection phase difference ΔT AC =|T A -TC |, where T A To regulate the reaction time, T C When it is a collective reaction;

[0034] Accommodation-constriction phase difference ΔT AP =|T A -T P |, where T A To regulate the reaction time, T P When the pupil constriction reaction occurs;

[0035] Convergence-constriction phase difference ΔT CP =|T C -T P |, where T C When it is a collective reaction, T P When the pupil constricts.

[0036] In some embodiments, the evaluation results of dynamic measurement of binocular vision function are obtained based on the temporal synchronicity quantification index, including:

[0037] When any one or more of the accommodation-convergence phase difference, accommodation-contraction phase difference, or convergence-contraction phase difference increases abnormally, a signal is emitted indicating that there is a synergistic dysfunction in the corresponding neural pathway.

[0038] In some embodiments, the controller is further configured to:

[0039] During the process of the driving device driving the visual target display device to move continuously in a straight line from far to near relative to the eyes to be detected, a dynamic curve is generated with real-time distance data as the horizontal axis and the angle between the visual axes of the two eyes as the vertical axis.

[0040] Based on the morphological characteristics of the dynamic curve of the set, the near-sensory set component in the set response is obtained. The near-sensory set component is a non-autonomous set response that is independent of adjustment and triggered by near-distance perception during the continuous approach of the target display device.

[0041] In some embodiments, the near-sensory set component corresponds to the initial rising segment of the set dynamic curve.

[0042] In some embodiments, the controller is further configured to:

[0043] During the continuous linear movement of the target display device, the physical size of the target image presented by the target display device is dynamically reduced simultaneously.

[0044] According to another aspect of this application, embodiments of this application also provide a method for dynamic measurement of binocular vision function, the method comprising a method executed by a controller in the aforementioned device.

[0045] The binocular vision function dynamic measurement device and method provided in the embodiments of this application control the continuous movement of the optotype display device. During the continuous movement of the optotype display device, real-time distance data, binocular visual axis angle data, pupil diameter data, and the time tags corresponding to these three types of data are recorded in real time. Based on the above data, the evaluation result of binocular vision function dynamic measurement is obtained. Physiological data is collected synchronously throughout the process, upgrading visual function detection from discrete static to continuous dynamic quantitative detection. The detection results are more in line with the real visual physiological state, avoiding the inherent defects of the negative lens method, and also avoiding the problem that the traditional proximity method can only make a rough assessment and cannot measure in real time, accurately, and quantitatively.

[0046] More importantly, this application creatively uses real-time distance data, binocular visual axis angle data, pupil diameter data, and the time labels corresponding to these three types of data to accurately quantify the temporal synchronization relationship of the three-linkage of regulation-convergence-pupil constriction through temporal domain correlation operations, thereby achieving an objective assessment of the synergistic function of neural pathways. This provides a new bioindicator for the diagnosis of binocular vision dysfunction, and is used to assess binocular vision function in a more quantitative, accurate, and effective manner. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the binocular vision function dynamic measurement device provided in an embodiment of this application;

[0049] Figure 2 This is a flowchart illustrating the usage method of the binocular vision function dynamic measurement device provided in an embodiment of this application.

[0050] The attached figures are labeled as follows:

[0051] Controller 100; movable visual target assembly 200; binocular signal acquisition assembly 300; human eye refractive correction assembly 400; negative lens measurement assembly 500.

[0052] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0053] The preferred embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection claimed in this application.

[0054] The terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0055] like Figure 1 As shown, an embodiment of this application provides a dynamic measurement device for binocular vision function, including a movable visual target component 200, a binocular signal acquisition component 300, and a controller 100. The dynamic measurement device for binocular vision function can be an improvement upon, for example, the subjective-objective integrated precision refraction device disclosed in the inventor's previous patent applications CN201910777661.8 and CN201910777914.1. Specifically, it can retain all the original optical paths and functions, and add the movable visual target component 200, the binocular signal acquisition component 300, and the controller 100 capable of executing the dynamic measurement method for binocular vision function provided in the embodiment of this application.

[0056] The movable visual target assembly 200 includes a driving device, a visual target display device, a linear guide rail, and a position sensor. The visual target display device is slidably mounted on the linear guide rail. The driving device drives the visual target display device to move continuously in a straight line along the linear guide rail, thereby continuously changing the distance between the visual target display device and the eyes to be tested. The position sensor is used to acquire real-time distance data between the visual target display device and the eyes to be tested. In this embodiment, the linear guide rail can be a silent precision linear guide rail, the driving device can be a servo drive motor, and the position sensor can be a high-precision grating position sensor. The visual target display device can be fixedly connected to a sliding base, and the sliding base is slidably connected to the linear guide rail. For example, the displacement range of the visual target display device can be 30cm-6m. Under the control of the controller, the visual target display device can achieve various movement modes such as uniform speed, variable speed, and stationary position to meet different visual function testing needs.

[0057] The binocular signal acquisition component 300 is used to synchronously acquire data on the visual axis angle and pupil diameter of both eyes in real time during the continuous movement of the visual target display device. The binocular signal acquisition component may include a binocular synchronous infrared camera unit and a pupil tracking unit, both with a sampling frequency of 200Hz, a visual axis angle recording accuracy of 0.1°, and a pupil diameter recording accuracy of 0.01mm, achieving high-precision synchronous acquisition of physiological signals.

[0058] The controller 100 is communicatively connected to the movable optotype component and the binocular signal acquisition component. The controller 100 can be an embedded industrial control terminal, integrating the existing optometry system with the new detection algorithm. For example, the new algorithm may include: first completing full refractive correction to establish a zero accommodation baseline, then controlling the optotype to move closer, acquiring data, performing calculations and analysis, generating a convergence dynamic curve, separating the near-sensory convergence and accommodative convergence components, calculating the three-linkage reaction time and phase difference, and outputting a complete evaluation report.

[0059] In this embodiment, the controller 100 is configured to: control the continuous movement of the visual target display device; during the continuous movement of the visual target display device, synchronously record and store real-time distance data, binocular visual axis angle data, and pupil diameter data using time as a label, and obtain a three-dimensional time series related to the real-time distance data, binocular visual axis angle data, and pupil diameter data; based on the three-dimensional time series, obtain a temporal synchronicity quantification index of the accommodation-convergence-pupil constriction three-linkage; and based on the temporal synchronicity quantification index, obtain the evaluation result of the dynamic measurement of binocular vision function.

[0060] The binocular vision function dynamic measurement device provided in the embodiments of this application controls the continuous movement of the optotype display device. During the continuous movement of the optotype display device, real-time distance data, binocular visual axis angle data, pupil diameter data, and the corresponding time tags of these three types of data are recorded in real time. Based on the above data, the evaluation result of the dynamic measurement of binocular vision function is obtained. Physiological data is collected synchronously throughout the process, upgrading the visual function detection from discrete static to continuous dynamic quantitative detection. The detection results are more in line with the real visual physiological state, avoiding the inherent defects of the negative lens method, and at the same time avoiding the problem that the traditional proximity method can only make a rough assessment and cannot measure in real time, accurately, and quantitatively.

[0061] More importantly, this application creatively uses real-time distance data, binocular visual axis angle data, pupil diameter data, and the time labels corresponding to these three types of data to accurately quantify the temporal synchronization relationship of the three-linkage of regulation-convergence-pupil constriction through temporal domain correlation operations, thereby achieving an objective assessment of the synergistic function of neural pathways. This provides a new bioindicator for the diagnosis of binocular vision dysfunction, and is used to assess binocular vision function in a more quantitative, accurate, and effective manner.

[0062] In some embodiments, a quantitative index of the temporal synchronicity of the accommodation-convergence-pupil constriction three-linkage is obtained based on a three-dimensional time series, including: obtaining the accommodation stimulus based on real-time distance data and time; obtaining the convergence response based on binocular visual axis angle data and time; obtaining the constriction response based on pupil diameter data and time; and fitting the temporal synchronicity relationship among the accommodation stimulus, convergence response, and constriction response to obtain the quantitative index of the temporal synchronicity of the accommodation-convergence-pupil constriction three-linkage.

[0063] In this embodiment, addressing the problem that traditional techniques cannot synchronously and accurately separate the three types of physiological responses—adjustment, convergence, and pupillary constriction—and can only obtain single indicators in a scattered manner, failing to quantify the three-linkage synergistic process and leading to a one-sided and unsystematic visual function assessment, this embodiment decomposes the three-dimensional time series step by step to accurately separate and quantify the three core physiological parameters: adjustment stimulus, convergence response, and pupillary constriction response. This lays the foundation for subsequent fitting of the temporal synchronization relationship of the three and quantification of the three-linkage characteristics, achieving a systematic and quantitative analysis of the three-linkage physiological process.

[0064] In some embodiments, the accommodative stimulus quantity is obtained based on real-time distance data and time, including: AS(t) = 1 / d(t), where AS(t) is the accommodative stimulus quantity at time t, d(t) is the real-time distance data between the optotype display device and the eyes to be tested at time t, the unit of AS(t) can be diopters (D), and the unit of d(t) can be meters (m); the convergence response quantity is obtained based on binocular visual axis angle data and time, including: CR(t) = α(t) / PD, where CR(t) = α(t) / PD. CR(t) represents the convergent response at time t, where CR(t) can be expressed in meters angles (MA). α(t) is the angle between the visual axes of the two eyes at time t, and PD is the pupillary distance of the two eyes under zero accommodation baseline conditions. The constriction response is obtained based on pupil diameter data and time, including: PR(t) = p(t0) - p(t), where PR(t) is the constriction response at time t relative to the distant reference time t0, p(t) is the pupil diameter data at time t, and p(t0) is the pupil diameter under zero accommodation baseline conditions. In this embodiment, standardized quantitative formulas for the three types of responses are creatively established, transforming measured data such as real-time distance, visual axis angle, and pupil diameter into industry-standard quantitative indicators. The convergent response is introduced into the pupillary distance, and the constriction response is bound to the zero accommodation baseline, eliminating interference from individual differences and baseline deviations, achieving accurate and unified conversion of response quantities, allowing for horizontal data comparison and enhancing clinical applicability.

[0065] In some embodiments, the temporal synchronization relationship among the accommodative stimulus, convergence response, and miosis response is fitted to obtain a quantitative index of the temporal synchronicity of the accommodation-convergence-miosis three-way linkage. This includes: performing temporal correlation analysis on three-dimensional data (AS(t), CR(t), PR(t)) over a continuous time series to calculate the accommodation reaction time, convergence reaction time, and miosis reaction time, and determining the phase difference between any two of the three. The accommodation reaction time is the time interval from the moment the target display device initiates displacement until the correlation coefficient between the accommodative stimulus and the actually measured change in refractive power first exceeds a first preset threshold; the convergence reaction time is the time interval from the moment the target display device initiates displacement until the rate of change of the convergence response first exceeds a second preset threshold; and the miosis reaction time is the time interval from the moment the target display device initiates displacement until the rate of decrease in pupil diameter data first exceeds a third preset threshold. The first, second, and third preset thresholds are determined based on empirical values. In this embodiment, the actual measured refractive power can be the objective refractive power obtained from real-time wavefront aberration measurement, i.e., the objective accommodative response. For example, the total refractive power of the human eye, which is collected in real-time, continuously, and objectively by the wavefront aberration acquisition module during the movement of the optotype display device, includes both static refractive and dynamic accommodative responses, and is a direct measurement of the true accommodative response. The correlation coefficient between the accommodative stimulus amount and the actual measured change in refractive power can be the Pearson correlation coefficient, which is used to measure the degree of linear correlation between the accommodative stimulus amount and the measured change in refractive power.

[0066] Correlation coefficient

[0067] Where AS(t) is the modulated stimulus amount, and M(t) is the actual measured refractive power. Let AS(t) be the mean. Let r be the mean of M(t). For example, when r first exceeds a first preset threshold (e.g., 0.8), the regulatory response can be determined to have started.

[0068] In this embodiment, the objective judgment logic and threshold rules of the above three types of reaction times are used to start from the target initiation displacement as a unified starting point and the quantitative index change rate / correlation coefficient is used as the judgment basis to avoid human subjective error; the response speed of the three-linkage physiological reaction is accurately quantified, providing an accurate temporal benchmark for subsequent calculation of phase difference and evaluation of neural pathway synergy, thereby improving the objectivity and reliability of temporal analysis.

[0069] In some embodiments, calculating the accommodation reaction time, convergence reaction time, and pupillary constriction reaction time, and determining the phase difference between any two of the three, includes: the accommodation-convergence phase difference ΔT. AC =|T A -TC |, where T A To regulate the reaction time, T C For a collection reaction; the accommodation-constriction phase difference ΔT AP =|T A -T P |, where T A To regulate the reaction time, T P During the pupillary constriction response; the convergence-pupil phase difference ΔT CP =|T C -T P |, where T C When it is a collective reaction, T P During the pupillary constriction response. In this embodiment, the above method is used to establish a quantitative calculation system for the phase difference between each pair of the three linkages, transforming temporal synchronicity into a quantifiable numerical indicator; the phase difference accurately reflects the temporal matching degree of the three types of physiological responses, intuitively presenting the difference in synergistic delay between neural pathways, providing a quantitative basis for accurately locating the link of synergistic dysfunction, and refining the assessment dimensions of the three linkage abnormalities.

[0070] In summary, fitting the temporal synchronization relationship among accommodation stimulus, convergence response, and miosis response to obtain a quantitative index of the temporal synchronicity of the accommodation-convergence-miosis three-way linkage can include the following steps: Using the moment the target display device initiates movement as a common zero point, interpolate and resample the three-dimensional time series to ensure a strict one-to-one correspondence between AS(t), CR(t), and PR(t) on the same time axis; using the far-distance stationary state before the target display device moves as a zero reference, perform baseline normalization on the three types of signals to eliminate interference from individual physiological differences; use a moving average filter to denoise the time series signals, preserving the physiological trend and removing high-frequency noise; automatically identify the signal start point, rising edge, rate change point, and stable point to determine the response initiation moment; using time as an offset, perform a sliding cross-correlation operation on each pair of signals, and take the offset corresponding to the maximum correlation coefficient as the physiological time delay. Determine the accommodation response time T according to a threshold. A T during aggregate reaction C T during pupillary constriction reaction P ; Calculate ΔT AC ΔT AP ΔT CP This forms a quantitative indicator of time-domain synchronization.

[0071] In some embodiments, the evaluation results of dynamic measurement of binocular vision function are obtained based on temporal synchronicity quantification indicators, including: when any one or more of the accommodation-convergence phase difference, accommodation-pupil phase difference, or convergence-pupil phase difference abnormally increase, a signal is issued indicating that there is a synergistic dysfunction in the corresponding neural pathway. In this embodiment, phase difference quantification indicators are used as the judgment criteria to automatically identify abnormalities in the synergistic function of neural pathways and issue prompt signals, establishing an objective and standardized abnormality judgment mechanism; reducing reliance on human experience, accurately detecting hidden neural synergistic disorders that are difficult to detect by traditional methods, and providing objective support for the early diagnosis and precise intervention of binocular vision function abnormalities.

[0072] In some embodiments, the controller is further configured to: generate a convergence dynamic curve using real-time distance data as the abscissa and binocular visual axis angle data as the ordinate during the continuous linear movement of the target display device relative to the eyes to be tested from far to near by the driving device; and obtain the near-sensory convergence component in the convergence response based on the morphological characteristics of the convergence dynamic curve. The near-sensory convergence component is a non-involuntary convergence response independent of accommodation triggered by near-distance perception during the continuous approach of the target display device; the convergence response may also include an accommodative convergence component, i.e., convergence triggered by accommodative stimuli, i.e., convergence dominated by the AC / A relationship. It is understood that traditional techniques cannot dynamically generate convergence change curves, cannot distinguish between near-sensory convergence and accommodative convergence components, can only measure the total convergence amount, and are difficult to determine the cause of convergence abnormalities (near-sensory drive or accommodation drive), resulting in blurred visual function classification and a lack of targeted rehabilitation training. In this embodiment, a dynamic convergence curve is generated dynamically from real-time data, intuitively presenting the entire process of convergence response changing with distance. It accurately separates the proximal convergence component, triggered by near-field perception and independent of accommodation, refining the dimensions of convergence function assessment and clarifying the causes of convergence abnormalities. This provides a reliable basis for accurate classification of visual function abnormalities and the development of targeted rehabilitation training programs. For example, when the proximal convergence component is abnormal, sensory / autonomic nervous system training can be performed; when the accommodation convergence component is abnormal, accommodation / AC / A can be trained.

[0073] In some embodiments, the proximal aggregation component corresponds to the initial rising segment of the aggregation dynamic curve. Specifically, the proximal aggregation component can correspond to the initial rising segment of the aggregation dynamic curve when the modulating stimulus has not yet changed significantly. More specifically, the proximal aggregation component can be the aggregation increase value within the range where the modulating stimulus change is <0.25D in the aggregation dynamic curve, that is: when ΔAS(t) = AS(t) - AS(t0) < 0.25D, the rising segment of the aggregation signal is defined as the proximal aggregation component. In this embodiment, a clear and identifiable morphological feature determination standard is established to avoid confusion between proximal aggregation and modulating aggregation components, ensure the accuracy and consistency of component separation, achieve accurate quantification of the proximal aggregation component, and improve the reliability of the subdivided evaluation of aggregation function.

[0074] In some embodiments, the controller is further configured to: simultaneously control the visual target display device to dynamically reduce the physical size of the visual target image it presents during the continuous linear movement of the visual target display device. In this embodiment, the physical size of the visual target is dynamically reduced synchronously during the approach of the visual target to compensate for the spectral magnification effect caused by the approaching distance, so that the imaging angle of the visual target on the retina remains constant, eliminating spectral distortion interference, ensuring that the real physical spatial distance is the only detection independent variable, the detection data is pure and interference-free, and accurately restores the real visual physiological response state of the human eye.

[0075] In some embodiments, the binocular vision function dynamic measurement device may further include a human eye refractive correction component 400 for refractive correction of the two eyes to be tested. In refractive correction mode, the optotype display device is held at a fixed distance to obtain refractive information of the two eyes to be tested, and then the human eye refractive correction component is adjusted to perform refractive correction of the two eyes to be tested and establish a zero-accommodation detection baseline; in binocular vision function detection mode, the drive device is activated and drives the optotype display device to perform linear displacement.

[0076] In some embodiments, the binocular vision function dynamic measurement device may further include a negative lens measurement component 500, which measures the subject's simple accommodation ability, defocus curve, and changes in best-corrected visual acuity by altering the total refractive power of the ocular optical system by progressively adding negative or positive lenses in the optical path under zero accommodation detection baseline. In this embodiment, the negative lens measurement component can be connected to a controller and complete the switching and measurement of negative lenses under the control of the controller. In this embodiment, by setting the negative lens measurement component, selective or synergistic detection of the approach method (controlling the optotype display device to move closer to the eyes to be tested) and the negative lens method (increasing the negative or positive lenses in front of the eyes to be tested) under the same baseline can be achieved, expanding the clinical testing scenarios. Preferably, the approach method and the negative lens method can be used synergistically in the same testing process: for example, the approach method is first performed to complete a full-item visual function test including accommodation-convergence-miosis linkage, heterophoria, AC / A ratio, and convergence near point; then, at the convergence near point distance, the negative lens method is switched to measure positive and negative relative accommodation (NRA / PRA) to evaluate the subject's accommodative reserve and relaxation ability under near fixation. Specifically, the visual target display device can be kept stationary at the convergence near point, and the negative lens method testing mode can be switched. With a step size of 0.25D, the negative lens and positive lens are increased sequentially to measure positive relative accommodation (PRA) and negative relative accommodation (NRA) respectively, so as to achieve a joint evaluation of dynamic visual function and static accommodation ability. The two types of test data are based on the same test baseline and can be mutually verified and complementary.

[0077] like Figure 2 As shown, by way of example, the method of using the binocular vision function dynamic measurement device provided in the embodiments of this application can be as follows:

[0078] Step S1: Turn on the binocular vision function dynamic measurement device, start the subjective and objective integrated precision refraction device, complete the objective refractive measurement and subjective correction of the subject's eyes, establish a far-distance zero-accommodation detection baseline, and record the reference pupil diameter.

[0079] Step S2: Control the drive device to move the target display device at a constant speed of 5cm / s from a distance of 6m to a distance of 30cm, while collecting real-time distance data and dynamically reducing the target size to maintain a constant imaging angle.

[0080] Step S3: The binocular signal acquisition component synchronously acquires binocular visual axis angle data and pupil diameter data in real time;

[0081] Step S4: The controller uses time as a label to synchronously integrate real-time distance data, binocular visual axis angle data, and pupil diameter data to form a three-dimensional time series;

[0082] Step S5: Perform correlation calculations using a preset algorithm, calculate the amount of accommodative stimulus, convergence response, and pupillary constriction response, generate a temporal synchronicity index, analyze reaction time and phase difference, plot convergence dynamic curves, and separate convergence components.

[0083] Step S6: Automatically generate and output an evaluation report that includes dynamic linkage relationships, temporal synchronization, and various visual function parameters.

[0084] According to another aspect of this application, embodiments of this application also provide a dynamic measurement method for binocular vision function, the method comprising a method executed by a controller in the aforementioned device. The binocular vision function dynamic measurement method based on the real physical distance approach method provided by this invention can be applied to the aforementioned device. It sequentially establishes a zero-accommodation baseline through full refractive correction, uniform target approach with constant visual angle compensation, synchronous acquisition of multi-dimensional physiological signals, temporal domain correlation calculation, and quantitative index analysis, ultimately outputting a complete binocular vision function assessment result, achieving dynamic, accurate, and full-process vision function detection.

[0085] Embodiments of this application also provide a device and method for dynamic measurement of binocular vision function, which has at least the following beneficial effects:

[0086] 1. Achieve dynamic and continuous quantitative detection, breaking through the limitations of traditional step-by-step fixed-point detection. Through real physical proximity + constant viewing angle technology, physiological data is collected synchronously throughout the process, upgrading visual function detection from discrete static to continuous dynamic quantitative detection. The detection results are more consistent with the real visual physiological state.

[0087] 2. It is the first to create a quantitative index for the time-domain synchronicity of the three-linkage of accommodation, convergence and pupil constriction. By calculating reaction time and phase difference, it can achieve an objective assessment of the synergistic function of neural pathways and provide a new bioindicator for the diagnosis of binocular vision dysfunction.

[0088] 3. Achieve precise separation and quantification of proximal and accommodative convergence, refine the dimensions of convergence function analysis, and provide a reliable basis for accurate classification of visual function abnormalities and targeted rehabilitation training.

[0089] 4. By using constant viewing angle technology to eliminate detection distortion, the only independent variable is physical distance, resulting in pure and accurate detection data and avoiding the viewing angle interference problem of traditional close-range detection.

[0090] 5. The integrated approach method and negative lens method are combined, and the same equipment and baseline are used to complete two types of tests. The process is simplified and the data is shared, which greatly improves the efficiency of clinical testing and enables a comprehensive assessment of physiological synergy and optical adjustment capabilities.

[0091] Based on the various embodiments of this application described above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0092] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A dynamic measurement device for binocular vision function, characterized in that, include: A movable visual target assembly includes a driving device, a visual target display device, a linear guide rail, and a position sensor. The visual target display device is slidably mounted on the linear guide rail. The driving device can drive the visual target display device to move continuously in a straight line along the linear guide rail to continuously change the distance between the visual target display device and the eyes to be tested. The position sensor is used to acquire real-time distance data between the visual target display device and the eyes to be tested. A binocular signal acquisition component is used to synchronously acquire data on the visual axis angle and pupil diameter of the two eyes to be tested in real time during the continuous movement of the visual target display device. The controller is communicatively connected to the movable visual target component and the binocular signal acquisition component; wherein, The controller is configured to: Control the target display device to move continuously; During the continuous movement of the visual target display device, real-time distance data, binocular visual axis angle data, and pupil diameter data are recorded and stored synchronously with time as the label, thereby obtaining a three-dimensional time series related to the real-time distance data, binocular visual axis angle data, and pupil diameter data. Based on the aforementioned three-dimensional time series, a quantitative index of the temporal synchronicity of the three-linkage of adjustment-convergence-pupil constriction is obtained; Based on the aforementioned temporal synchronicity quantification index, the evaluation results of dynamic measurement of binocular vision function are obtained.

2. The apparatus according to claim 1, characterized in that, Based on the aforementioned three-dimensional time series, a quantitative index of the temporal synchronicity of the accommodation-convergence-constriction three-linkage mechanism is obtained, including: The amount of adjustable stimulation is obtained based on the real-time distance data and time. The ensemble response is obtained based on the binocular visual axis angle data and time. The pupillary constriction response amount was obtained based on the pupil diameter data and time. The temporal synchronization relationship among the accommodative stimulus, the convergence response, and the miosis response is fitted to obtain a quantitative index of the temporal synchronization of the accommodative-convergence-miosis three-linkage.

3. The apparatus according to claim 2, characterized in that, The modulated stimulus amount is obtained based on the real-time distance data and time, including: AS(t) = 1 / d(t), where AS(t) is the amount of adjustment stimulus at time t, and d(t) is the real-time distance data between the optotype display device and the eyes to be tested at time t; The ensemble response is obtained based on the binocular visual axis angle data and time, including: CR(t) = α(t) / PD, where CR(t) is the ensemble response at time t, α(t) is the angle between the visual axes of the two eyes at time t, and PD is the interpupillary distance of the two eyes to be tested under zero accommodation baseline conditions; The pupillary constriction response is obtained based on the pupil diameter data and time, including: PR(t) = p(t0) - p(t), where PR(t) is the pupillary constriction response at time t relative to the distant reference time t0, p(t) is the pupil diameter at time t, and p(t0) is the pupil diameter at zero accommodation baseline.

4. The apparatus according to claim 3, characterized in that, The temporal synchronization relationship among the accommodation stimulus, convergence response, and miosis response is fitted to obtain a quantitative index of the temporal synchronization of the accommodation-convergence-miosis three-way linkage, including: By performing time-domain correlation analysis on three-dimensional data (AS(t), CR(t), PR(t)) over a continuous time series, the adjustment reaction time, convergence reaction time, and pupillary constriction reaction time are calculated, and the phase difference between any two of the three is determined; among them, The adjustment response time is the time interval from the moment the target display device starts displacement until the correlation coefficient between the adjustment stimulus amount and the actual measured change in refractive power first exceeds a first preset threshold. The aggregate reaction time is the time interval from the moment the target display device starts displacement until the rate of change of the aggregate reaction quantity first exceeds the second preset threshold. The pupil constriction response time is the time interval from the moment the target display device starts displacement until the rate of pupil diameter reduction first exceeds a third preset threshold. The first preset threshold, the second preset threshold, and the third preset threshold are determined based on empirical values.

5. The apparatus according to claim 4, characterized in that, Calculate the accommodation reaction time, convergence reaction time, and pupillary constriction reaction time, and determine the phase difference between any two of the three, including: Adjustment-collection phase difference ΔT AC =|T A -T C |, where T A To regulate the reaction time, T C When it is a collective reaction; Accommodation-constriction phase difference ΔT AP =|T A -T P |, where T A To regulate the reaction time, T P When the pupil constriction reaction occurs; Convergence-constriction phase difference ΔT CP =|T C -T P |, where T C When it is a collective reaction, T P When the pupil constricts.

6. The apparatus according to claim 5, characterized in that, Based on the aforementioned temporal synchronicity quantification index, the evaluation results of dynamic measurement of binocular vision function are obtained, including: When any one or more of the accommodation-convergence phase difference, accommodation-contraction phase difference, or convergence-contraction phase difference increases abnormally, a signal is emitted indicating that there is a synergistic dysfunction in the corresponding neural pathway.

7. The apparatus according to claim 1, characterized in that, The controller is also configured to: During the process of the driving device driving the visual target display device to move continuously in a straight line from far to near relative to the eyes to be detected, a dynamic curve is generated with the real-time distance data as the horizontal axis and the angle between the visual axes of the two eyes as the vertical axis. Based on the morphological characteristics of the dynamic curve of the set, the proximal sensing set component in the set response is obtained. The proximal sensing set component is a non-autonomous set response that is independent of adjustment and triggered by close-range perception during the continuous approach of the target display device.

8. The apparatus according to claim 7, characterized in that, The near-sensory set component corresponds to the initial rising segment of the set dynamic curve.

9. The apparatus according to claim 1, characterized in that, The controller is also configured to: During the continuous linear movement of the target display device, the physical size of the target image presented by the target display device is dynamically reduced simultaneously.

10. A method for dynamic measurement of binocular vision function, characterized in that, The method includes a method performed by a controller in the apparatus according to any one of claims 1-9.

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