Portable short-distance and long-distance eye position and adjustability set-adjustment ratio screening instrument

Abstract

The invention relates to the technical field of short-distance and long-distance eye position and AC / A detection, and discloses a portable short-distance and long-distance eye position and adjustability set-adjustment ratio screening instrument which integrates a first mode, a second mode and a third mode, the first mode is long-distance eye position detection, the second mode is short-distance eye position detection, and the third mode is AC / A ratio detection; the screening instrument is of a binocular telescope structure, and a set of fixed separation prisms, a set of rotatable annular prisms and a set of + 1.00 D spherical lens additional system are arranged on the binocular telescope structure. A distance conversion system, a sighting mark projection module and a control button. The screening instrument has the characteristics of portability, operability and low cost, is suitable for daily detection of individuals and medical institutions, has a modular structure, is convenient to clean and maintain, and ensures the sanitation of the detection process and the reliability of data. The screening instrument is also suitable for being popularized and used in community health general survey, and provides a reliable auxiliary tool for visual function health screening.

Description

Technical Field

[0001] The present invention relates to the technical field of near and far eye positions and AC / A detection, and particularly relates to a portable near and far eye position and accommodative convergence - accommodation ratio screening instrument. Background Art

[0002] In recent years, with the popularization of electronic devices and the increase in near - distance eye use in work and study environments, problems such as visual fatigue and binocular vision abnormalities have become increasingly prominent in the population. In particular, the rapid increase in the myopia rate among teenagers has attracted wide social attention. The normal development of binocular vision function depends on the coordination of accommodation and convergence functions, and this coordination relationship can be evaluated through the detection of near and far eye positions and AC / A.

[0003] The near and far eye positions reflect the convergence state of the eyes at different distances and are used to evaluate whether accommodation and convergence are coordinated; while the AC / A ratio refers to the ratio between the degree of convergence caused by accommodation and the amplitude of accommodation, which can quantify the effectiveness of accommodative convergence. Appropriate near and far eye positions and normal AC / A ratios can maintain visual clarity and comfort, while abnormal eye positions and AC / A ratios are likely to cause visual fatigue, diplopia, blurred vision, and may even lead to binocular vision dysfunctions such as strabismus.

[0004] Traditional binocular vision function examination devices are mostly professional instruments, which are large in size, complex in structure and expensive in price. They are mainly used in hospitals and professional institutions and are difficult to be popularized to families or communities. This limitation makes it difficult for the general public to obtain convenient and low - cost opportunities for self - checking visual functions in daily life, especially in the initial stage of binocular vision function abnormalities, timely intervention and management are often not available. On the other hand, public health institutions also face problems of high cost and great operation difficulty when conducting large - scale screenings in communities, which limits the popularity and efficiency of eye health screenings.

[0005] Currently, the commonly used eye position and AC / A ratio detection devices on the market have the following deficiencies:

[0006] 1) Poor portability: Most of the existing eye position and AC / A ratio detection devices are in desktop or floor - standing structures, with large weight and volume, inconvenient to use and store, and difficult to achieve portable self - checking.

[0007] 2) Complex operation: The operation of professional devices involves steps such as adjusting the prism diopter and changing the lens settings, which requires trained operators and it is difficult for ordinary users to independently complete the detection.

[0008] 3) High cost: Traditional eye position and AC / A ratio detection devices are expensive, which makes it difficult to popularize them among individual users and at the same time increases the cost of large - scale screenings by public health institutions.

[0009] 4) Lack of multi-functional integration: Most existing devices focus on eye position detection at a single distance, making it difficult to achieve multi-functional detection of near and far eye positions and AC / A ratio on the same device. Summary of the Invention

[0010] The purpose of the present invention is to provide a portable near and far eye position and accommodative convergence - accommodation ratio screening instrument, aiming to provide a convenient, economical and efficient binocular vision function detection device for individual users and public health institutions to meet the rapid screening needs of near and far eye positions and AC / A ratio. The present invention is designed similar to binoculars, with good portability and simple operation methods, and can provide users with a variety of visual function screening modes, and realize self-check of eye position and accommodation function through mode switching.

[0011] In order to achieve the above purpose, the following technical solutions are adopted:

[0012] A portable near and far eye position and accommodative convergence - accommodation ratio screening instrument integrates three detection modes, namely Mode 1, Mode 2 and Mode 3. Mode 1 is for distant eye position detection, Mode 2 is for near eye position detection, and Mode 3 is for AC / A ratio detection;

[0013] It includes a binocular telescope structure, and the following are arranged on the binocular telescope structure:

[0014] A set of fixed split prisms;

[0015] A set of rotatable annular prisms;

[0016] A set of +1.00D spherical lens attachment systems;

[0017] A distance conversion system for switching the visual target projection distance between 33 cm and 6 m, which is switched through a switching button;

[0018] A visual target projection module for projecting different visual targets at a specified distance;

[0019] Control buttons for switching the visual target projection distance between 33 cm and 6 m and attaching the +1.00D spherical lens.

[0020] Preferably, in the above portable near and far eye position and accommodative convergence - accommodation ratio screening instrument, Mode 1 is used to detect the user's distant eye position. By presenting split visual targets within a visual distance range of 6 m and using adjustable prism diopters, the distant eye position can be quickly judged to ensure accurate detection of the hyperopic eye position;

[0021] Mode 2 is used to detect the near eye position. By presenting split visual targets within 33 cm, the myopic eye position state of the user can be evaluated;

[0022] Mode 3 is used to detect the near eye position in the adjustment state. By presenting a dissociative visual target at 33 cm and placing a +1.00D spherical lens in front of the eyes, it assists in measuring the AC / A ratio, thereby achieving a rapid screening of the accommodation-convergence function.

[0023] Preferably, in the above portable near and far eye position and accommodation-convergence ratio screening instrument, the set of fixed dissociative prisms includes a prism angle of 6△BU for the right eye and 12△BI for the left eye, so that the subject can observe two dissociative visual targets in the upper left and lower right through binocular vision, thereby effectively detecting the deviation of the eye position.

[0024] Preferably, in the above portable near and far eye position and accommodation-convergence ratio screening instrument, the set of rotatable annular prisms is arranged in a rotating assembly. A 0-4△BU and 0-20△BD annular prism are configured in front of the right eye, and an 8△BI and 0-20△BO annular prism are configured in front of the left eye. The prism degree is adjusted through the rotating assembly to meet the detection requirements of different eye positions.

[0025] Preferably, in the above portable near and far eye position and accommodation-convergence ratio screening instrument, the +1.00D spherical lens attachment system is set in Mode 3. By automatically placing the +1.00D spherical lens into the observation path, it realizes the auxiliary detection of the AC / A ratio of the subject and evaluates the coordination of accommodation and convergence.

[0026] Preferably, in the above portable near and far eye position and accommodation-convergence ratio screening instrument, the visual target projection module has an adjustable visual target display device, and the adjustable visual target display device is used to project different types of dissociative visual targets at a specified distance by changing the projection angle and position, meeting the detection requirements of Mode 1, Mode 2 or Mode 3.

[0027] Preferably, in the above portable near and far eye position and accommodation-convergence ratio screening instrument, the visual target projection module has an adjustable visual target display device, which projects different types of dissociative visual targets at a specified distance by changing the projection angle and position, meeting the detection requirements of Modes 1, 2, and 3.

[0028] Preferably, in the above portable near and far eye position and accommodation-convergence ratio screening instrument, the control button is used to control the switching of different detection modes, including switching the visual target projection distance between 33 cm and 6 m, enabling or disabling the +1.00D spherical lens attachment system, and adjusting the set of rotatable annular prisms, so that the user can complete the corresponding eye position and AC / A ratio detection operations in different modes.

[0029] Preferably, in the above portable near and far eye position and accommodative convergence - accommodation ratio screener, the housing of the binocular telescope structure is designed with anti - slip material, which is convenient for users to hold with one hand and has a modular disassembly function.

[0030] The beneficial effects of the present invention are as follows:

[0031] 1. Portability and ease of operation: The portable screener of this invention patent adopts the appearance design of binocular telescope, with a compact and lightweight structure, which is convenient for carrying and storing, and can be used conveniently in places such as homes, schools, and communities. Its operation interface is simple. Users only need to toggle the button to switch different detection modes and can complete the detection independently without the assistance of professionals. This is difficult to achieve in traditional large - sized and complex - operation - dependent devices, significantly improving the portability of the device and the user experience.

[0032] 2. Multi - functional integrated design: This device integrates three functions: near - distance eye position detection, far - distance eye position detection, and accommodative convergence - accommodation ratio (AC / A) detection, enabling users to comprehensively evaluate binocular vision functions without using multiple devices. Different modes can be easily switched through buttons, and the device can flexibly switch between detection distances of 33 cm and 6 m, effectively saving detection time and equipment costs.

[0033] 3. Low - cost and high - efficiency screening: This invention patent selects economical components in the design, optimizing the production cost and making the device have a high cost - performance ratio. Its efficient and convenient detection method is suitable for large - scale promotion and use, especially having extremely high application value in community health censuses and public health screenings. Compared with expensive professional equipment, this screener significantly reduces the threshold for eye position and AC / A ratio detection, making it affordable for more users.

[0034] 4. Hygiene and reliability: This screener adopts a modular structure design, and each component is easy to disassemble and clean, effectively ensuring the hygiene of the device. At the same time, the design of the prism, spherical mirror, and target module makes the detection results more stable, providing reliable data support. In contrast, traditional devices usually have complex structures, inconvenient maintenance, potential hygiene hazards, and difficult - to - guarantee reliability.

[0035] 5. Suitable for multiple populations: The detection method of this device takes into account the needs of users of different age groups and is suitable for children, adolescents, and adults to conduct self - examinations of visual functions, especially for the detection of visual fatigue, binocular accommodation disorders, and early binocular vision function disorders. At the same time, the simple operation method of this device enables non - professional users to conveniently conduct self - examinations, effectively improving the early detection rate and prevention rate of binocular vision abnormalities. Description of the Drawings

[0036] Figure 1Shows an overall appearance diagram of a portable near and far eye position and accommodative convergence - accommodation ratio screening instrument according to an embodiment of the present invention.

[0037] Figure 2 Shows a structural diagram of the near and far eye position test module of a portable near and far eye position and accommodative convergence - accommodation ratio screening instrument according to an embodiment of the present invention.

[0038] Figure 3 Shows a near and far distance conversion diagram of a portable near and far eye position and accommodative convergence - accommodation ratio screening instrument according to an embodiment of the present invention (simulating the conversion of near and far distances through spherical lens conversion).

[0039] Figure 4 Shows a structural diagram of the AC / A test module of a portable near and far eye position and accommodative convergence - accommodation ratio screening instrument according to an embodiment of the present invention; (realizing the measurement of AC / A by adding a +1.00D spherical lens).

[0040] Figure 5 Shows an optical path diagram of the visual target display of a portable near and far eye position and accommodative convergence - accommodation ratio screening instrument according to an embodiment of the present invention (adjusting the light through a reflecting mirror so that both eyes can simultaneously see a single visual target in the lens barrel).

[0041] Reference numerals:

[0042] 1: Lens cartridge; 2: Lens barrel; 3: Rotating annular prism; 4: Distance conversion system; 5: +1.00D spherical lens additional unit; 6: Visual target projection module; 7: Separating prism; 8: 33 - centimeter magnifying lens; 9: 6 - meter magnifying lens; 10: +1.00D spherical lens. Detailed implementation manners

[0043] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0044] The following further describes in detail the specific implementation manners of the present invention in conjunction with the drawings and embodiments.

[0045] An embodiment of the present invention provides a portable near and far eye position and accommodative convergence - accommodation ratio screener. This portable near and far eye position and accommodative convergence - accommodation ratio screener has the function of detecting eye positions at close and far distances, and can detect the AC / A ratio through a built - in +1.00D spherical lens 10, which is suitable for users to quickly self - check the binocular vision status at different distances. The device structure is similar to that of binoculars, with simple operation. By toggling a button, it can switch between different detection modes, enabling users to easily complete eye position and AC / A screening between distances of 33 cm and 6 m. In addition, through modular design, the screener features low cost and is easy to clean and maintain, making it suitable for convenient application by individuals and public health institutions in daily life or general surveys, providing innovative technical support for the early screening and health management of binocular vision functions.

[0046] Please refer to Figures 1 to 5 As shown, the main body of this portable near and far eye position and accommodative convergence - accommodation ratio screener has a binocular structure, including two eyepiece channels, a target display module, prism and lens components, a distance conversion system, control buttons and other components. Its appearance is convenient for holding and carrying, and is suitable for personal and community screening. Among them, the eyepiece channel includes a lens chamber 1 and a barrel 2, and the lens chamber 1 is arranged inside the barrel 2.

[0047] Among them, the core components and working principles are as follows:

[0048] Split prism assembly: In the device, the split prism 7 is fixed on the optical path of the eyepiece channel, enabling the user to see the split targets. The split prism 7 is configured as follows:

[0049] A 6△BU (Base Up) prism is installed in front of the right eye, and a 12△BI (Base In) prism is installed in front of the left eye. This configuration projects two targets in the eyepiece channel, located in the upper - left and lower - right fields of view respectively.

[0050] This design is used to separate the targets at far and near distances, facilitating the detection of eye position deviation.

[0051] Rotating annular prism assembly: A rotating annular prism 3 is installed in front of each eyepiece. The user can adjust the prism power as needed to meet the detection requirements of different eye positions. The specific configuration is as follows:

[0052] A 0 - 4△BU and 0 - 20△BD annular prism is installed in front of the right eye.

[0053] An 8△BI and 0 - 20△BO annular prism is installed in front of the left eye.

[0054] Through rotation adjustment, the user can select a suitable prism angle to meet the personalized detection needs of different users.

[0055] +1.00D spherical lens addition system 5: In the AC / A ratio detection mode, a +1.00D spherical lens 10 is added in front of the eyepiece through the control button to simulate the near eye position under the adjustment state, facilitating the user to evaluate the coordination and stability of the accommodative convergence function.

[0056] Distance conversion system 4: It includes +3D and +0.167D lenses (i.e., 33 cm magnifying lens 8 and 6 m magnifying lens 9), which are used to adjust the actual detection distance of the projected target, enabling the device to flexibly switch between 33 cm and 6 m.

[0057] Through button selection, the user can switch to the near-distance mode of 33 cm or the far-distance mode of 6 m according to the detection requirements, realizing eye position detection at multiple distances.

[0058] Target projection module 6: The device has two groups of light reflection lenses and a target

[0059] Control buttons: The device is equipped with multiple control buttons, and the user can switch between the following functions through the control buttons:

[0060] Switch between near and far detection modes;

[0061] Activate the +1.00D spherical lens addition system 5 to enter the AC / A ratio detection mode;

[0062] Adjust the degree of the rotating annular prism to meet the personalized needs of the user's eye position.

[0063] The operation process of this portable near and far eye position and accommodative convergence - accommodation ratio screening instrument is as follows:

[0064] 1. Far - distance eye position detection (Mode 1):

[0065] 1) The user selects the far - distance detection mode and simulates a 6 - m visual distance through the spherical lens addition.

[0066] 2) The split prism enables the user to observe two targets, one on the upper left and the other on the lower right. The user adjusts the prism angle by rotating the annular prism to judge the deviation of the eye position and quickly evaluate the far - distance eye position state.

[0067] 2. Near - distance eye position detection (Mode 2):

[0068] 1) The user switches to the near - distance detection mode and projects the target to a 33 - cm visual distance.

[0069] 2) Through the split prism, the user can observe the targets separated for the left and right eyes, and detect the convergence state of the near - distance eye position by adjusting the annular prism.

[0070] 3. AC / A ratio detection (Mode 3):

[0071] 1) The user switches to the AC / A detection mode. At this time, based on a distance of 33 cm, a +1.00D spherical lens is placed in front of the eyepiece.

[0072] 2) The user observes the visual target in the adjustment state, adjusts the prism diopter by rotating the annular prism, evaluates the convergence response of both eyes at close range, and obtains the measurement result of the AC / A ratio.

[0073] The working principle of this portable near and far eye position and accommodative convergence - accommodation ratio screener is as follows:

[0074] This portable near and far eye position and accommodative convergence - accommodation ratio screener combines optical components, a prism system, visual targets, and adjustment lenses, and uses optical path and prism separation technologies to screen the eye position and AC / A ratio at different distances. This device relies on the optical adjustment and separated visual target functions under different viewing distance conditions to assist the user in evaluating the eye position deviation at far and near distances and the accommodative convergence - accommodation ratio.

[0075] 1. Simulation of far and near viewing distances

[0076] Through the distance conversion system in the device, using +3D and +0.167D lenses, the visual target can be projected onto two standard distances of 33 cm and 6 m in the optical channel, thereby simulating the visual responses of the test subject's eyes at far and near distances. This viewing distance simulation principle can accurately present the visual targets at long distance (6 m) and short distance (33 cm), and achieve independent detection of the far and near eye positions.

[0077] 2. Detection principle of separated visual targets

[0078] The separated visual target is the core principle for detecting the eye position in this screener, specifically including the following optical separation designs:

[0079] 1) The separation prism components installed in the eyepiece channel place prisms of 6△BU (right eye) and 12△BI (left eye) in front of the left and right eyes respectively, so as to separate the lines of sight of the left and right eyes, enabling the user to observe two visual targets at the upper left and lower right positions in the visual fields of each eye respectively.

[0080] 2) This separation effect is used to guide the user to project the visual targets into different visual fields of the left and right eyes respectively, facilitating the judgment of whether the eye position is normal and helping to identify potential eye position deviations at far and near viewing distances.

[0081] 3. Annular prism adjustment

[0082] To meet the individualized eye position needs of users, the device of this invention patent installs rotating annular prisms with 0-4△BU and 0-20△BD (right eye) as well as 8△BI and 0-20△BO (left eye) in front of the left and right eyes respectively. Users can adjust the prism angle by rotation to achieve fine adjustment and accurately locate the eye position state. This adjustment function can perform more accurate correction detection on the near and far eye positions of users and improve the screening accuracy.

[0083] 4. Detection principle of AC / A ratio

[0084] In the AC / A detection mode, based on the near vision mode, a +1.00D spherical lens 10 is added in front of the eyepiece to enable users to enter the convergence detection environment under the adjustment state and measure the coordination between accommodation and convergence. The +1.00D spherical lens 10 will induce an accommodation response, simulate the accommodation load of users, and obtain the AC / A ratio value by observing the convergence response of the visual target.

[0085] 5. Visual target module

[0086] Through the principle of plane mirror reflection, lenses at a certain angle are set at the end of the lens barrel to change the optical path so that both eyes can see the same visual target simultaneously.

[0087] 6. Control system

[0088] Users can achieve prism diopter conversion, distance conversion, and the additional function of the +1.00D spherical lens through the control buttons. The control system is responsible for switching the detection mode and adding lenses, and synchronizes the operation of each functional component according to the user's operation to ensure that the operation process is simple and smooth, and at the same time meets the requirements of multi-mode detection.

[0089] The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Those of ordinary skill in the relevant technical fields can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention shall be defined by the claims.

Claims

1. A convenient near and far distance eye position and accommodation convergence-accommodation ratio screening instrument, characterized in that: Three detection modes are integrated, namely mode 1, mode 2 and mode 3. Mode 1 is long-distance eye position detection, mode 2 is close-distance eye position detection, and mode 3 is AC / A ratio detection. It comprises a binoculars structure, on which are arranged: a fixed set of split prisms; a set of rotatable annular prisms; A set of +1.00D spherical lens attachment system; A distance conversion system for switching the sight mark projection distance between 33 cm and 6 meters, which is switched by a switch button; A sight mark projection module, used for projecting different sight marks at a specified distance; Control button for switching the sight mark projection distance between 33 cm and 6 meters and for attaching a +1.00D spherical lens.

2. The portable near and far distance eye position and accommodation convergence-accommodation ratio screening instrument as claimed in claim 1, characterized in that: Mode 1 is used to detect the user's long-distance eye position, by presenting a separated sight mark within a viewing distance of 6 meters and using an adjustable prism to quickly determine the long-distance eye position, thereby ensuring accurate detection of the hyperopic eye position; Mode 2 is used to detect near-distance eye position, by presenting a separation sight mark within 33 cm, thereby evaluating the user's near-sighted eye position status; Mode three is used to detect the near eye position in the accommodative state, by presenting a separation sight mark at 33 cm and placing a +1.00D spherical lens in front of the eyes to assist in measuring the AC / A ratio, thereby achieving a rapid screening of the accommodative convergence function.

3. The portable near and far distance eye position and accommodation convergence-accommodation ratio screening instrument as claimed in claim 1, characterized in that: The set of fixed separation prisms includes corners of the right eye 6△BU and the left eye 12△BI, so that the subject can observe two separation sight marks at the upper left and lower right through binocular vision, thereby effectively detecting eye position deviation.

4. The portable near and far distance eye position and accommodation convergence-accommodation ratio screening instrument as claimed in claim 1, characterized in that: The group of rotatable annular prisms is arranged in a rotating component. 0-4△BU and 0-20△BD annular prisms are configured in front of the right eye, and 8△BI and 0-20△BO annular prisms are configured in front of the left eye. The prism degree is adjusted by the rotating component to meet different eye position detection needs.

5. The portable near and far distance eye position and accommodation convergence-accommodation ratio screening instrument as claimed in claim 1, characterized in that: The +1.00D spherical lens attachment system is set in mode three, and the +1.00D spherical lens is automatically placed in the observation path to achieve auxiliary detection of the AC / A ratio of the subject and evaluate the coordination of accommodation and convergence.

6. The portable near and far distance eye position and accommodation convergence-accommodation ratio screening instrument as claimed in claim 1, characterized in that: The sight mark projection module has an adjustable sight mark display device, which is used to project different types of separated sight marks at a specified distance by changing the projection angle and position to meet the detection requirements of mode one, mode two or mode three.

7. The portable near and far distance eye position and accommodation convergence-accommodation ratio screening instrument as claimed in claim 1, characterized in that: The sight mark projection module has an adjustable sight mark display device, which projects different types of separated sight marks at a specified distance by changing the projection angle and position to meet the detection requirements of modes one, two, and three.

8. The portable near and far distance eye position and accommodation convergence-accommodation ratio screening instrument as claimed in claim 1, characterized in that: The control button is used to control the switching of different detection modes, including switching the sight mark projection distance between 33 cm and 6 meters, enabling or disabling the +1.00D spherical lens attachment system, and adjusting the set of rotatable annular prisms, so that the user can complete the corresponding eye position and AC / A ratio detection operations in different modes.

9. The portable near and far distance eye position and accommodation convergence-accommodation ratio screening instrument as claimed in claim 1, characterized in that: The outer shell of the binoculars structure is designed with anti-slip material, which is convenient for users to hold with one hand and has a modular disassembly function.

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