Portable visual function screening instrument

Abstract

The invention discloses a portable visual function screening instrument which comprises a lens bin, and lens cones are symmetrically installed on the two sides of the lens bin. The lens module switching system comprises a mounting main shaft, and a plurality of lens switching units are mounted on the mounting main shaft; a Worth4 point test lens module group, wherein the Worth4 point test lens module group comprises a red and green filter lens group and a Worth4 point sighting target lens group; the stereoscopic vision function detection lens module comprises a stereoscopic sighting target lens group and a polarizer group, the stereoscopic sighting target lens group is arranged at the rear end of the lens cone, and the polarizer group is arranged at the front end of the lens cone; and the distance conversion lens module comprises two groups of distance conversion lens groups, and the two groups of distance conversion lens groups are respectively arranged at the middle positions in the two groups of lens cones. According to the invention, two modes of Worth four-point test and stereo vision detection are integrated, preliminary screening of simultaneous vision, fusion vision and stereo vision is covered, and the detection function is more comprehensive.

Description

Technical Field

[0001] The present invention relates to the technical field of visual function detection, and in particular to a portable visual function screening instrument. Background Art

[0002] With the widespread use of electronic devices, the phenomenon of abnormal visual function caused by long-term close-up use of the eyes is gradually increasing. Abnormal binocular vision function can manifest as visual fatigue, monocular vision, diplopia or inaccurate spatial positioning, which can seriously affect study, work and life. Traditional binocular vision function testing mainly relies on professional equipment and personnel. Although it is highly accurate, it is costly and complicated to operate. It is not suitable for family self-examination or large-scale screening in primary medical institutions. Therefore, there is an urgent need for a low-cost, highly portable and easy-to-operate binocular vision function testing device to help the public preliminarily screen their simultaneous vision, fusion and stereoscopic vision functions.

[0003] Visual function refers to the ability of the eyes to perceive and process external objects, covering aspects such as light perception, color perception, shape perception (vision), motion perception (stereoscopic perception) and contrast perception. Binocular vision function is mainly divided into three levels: simultaneous vision, fusion vision and stereoscopic vision, which correspond to basic visual perception, image integration and spatial depth recognition ability respectively.

[0004] Simultaneous vision refers to the basic ability of both eyes to perceive external objects at the same time. This function is the basis of binocular vision and the prerequisite for the brain to fuse the images of both eyes. Lack of simultaneous vision will lead to monocular vision, which will affect spatial positioning and depth perception, and easily lead to distance judgment errors. The detection and training of simultaneous vision is of great significance for the diagnosis and treatment of binocular vision disorders such as strabismus and amblyopia.

[0005] Fusion vision refers to the brain's ability to integrate images from both eyes into a whole, and is the core of binocular vision. Fusion disorders may lead to problems such as diplopia (ghosting) and eye fatigue, which seriously affect the quality of daily life and work. Testing and training of fusion ability can help enhance the stability and comfort of binocular vision, thereby improving the quality of life of patients.

[0006] Stereopsis is the brain's ability to use binocular disparity information to perceive the depth and spatial position of objects. The lack of stereopsis can affect spatial positioning, hand-eye coordination, and the judgment of object movement, thereby limiting daily activities and sports performance. The detection and training of stereopsis is essential for the early detection and intervention of binocular vision dysfunction.

[0007] In clinical practice, patients with abnormal visual function may not have obvious symptoms in the early stage, but as the binocular visual system gradually becomes fatigued, they may show eye discomfort, visual fatigue, and even a tendency to worsen myopia. Therefore, early visual function testing and training play a key role in preventing the development of myopia and improving binocular vision, especially for patients with strabismus, amblyopia, cataracts, etc.

[0008] Existing testing methods mainly include contour stereopsis test, random dot stereopsis test, Randot Preschool Stereoacuity Test, perimeter test, and binocular vision assessment through visual evoked potential (VEP) and other technologies. Although these methods are accurate, most of them rely on large equipment and require professional technicians to operate. They are suitable for clinical diagnosis, but not for personal self-examination or large-scale census. They have the problems of complex operation, expensive equipment and poor portability.

[0009] Based on the above requirements, the present invention proposes a simple home visual function self-testing instrument which is easy to carry, low in cost and easy to operate. Summary of the invention

[0010] The purpose of the present invention is to provide a portable visual function screening instrument to solve the problems existing in the prior art.

[0011] To achieve the above object, the present invention provides the following solution: The present invention provides a portable visual function screening instrument, comprising:

[0012] A lens chamber, wherein lens barrels are symmetrically mounted on both sides of the lens chamber, and the lens chamber is in communication with the lens barrels;

[0013] A lens module switching system, the lens module switching system comprising a mounting spindle mounted in the lens chamber, and a plurality of lens switching units mounted on the mounting spindle;

[0014] A Worth 4-point test lens module, wherein the Worth 4-point test lens module comprises a red and green filter group and a Worth 4-point sight mark lens group, wherein the Worth 4-point sight mark lens group is arranged at the rear end of the lens barrel, and the red and green filter group is arranged at the front end of the lens barrel;

[0015] A stereoscopic vision function detection lens module, wherein the stereoscopic vision function detection lens module comprises a stereoscopic sight mark lens group and a polarization lens group, wherein the stereoscopic sight mark lens group is arranged at the rear end of the lens barrel, and the polarization lens group is arranged at the front end of the lens barrel;

[0016] A distance conversion lens module, the distance conversion lens module comprises two sets of distance conversion lens groups, the two sets of distance conversion lens groups are respectively arranged at the middle position of the two sets of lens barrels, the distance conversion lens groups are used to switch the visual distance between the Worth 4-point sight mark lens group and the red and green filter lens group, and between the stereoscopic sight mark lens group and the polarization lens group to 33cm and / or 6m;

[0017] Among them, the red and green filter group, the Worth 4-point sight mark group, the stereoscopic sight mark group, the polarization group, and the distance conversion group are respectively installed on a plurality of the lens switching units.

[0018] According to the portable visual function screening instrument provided by the present invention, the lens switching unit includes a mounting ring rotatably connected to the mounting spindle, the outer wall of the mounting ring is provided with an annular groove, the annular groove is provided with an outward-expanding spiral groove, a connecting block is slidably connected to the outward-expanding spiral groove, a lens frame is slidably connected to the lens compartment, one end of the lens frame is rotatably connected to the connecting block, and the other side of the mounting block is rotatably connected to a control gear, the outer wall of the lens compartment is provided with a through groove, the control gear extends out of the lens compartment through the through groove, and the control gear is rotatably connected to the through groove.

[0019] According to the portable visual function screening instrument provided by the present invention, the red and green filter group includes two groups of red and green filter lenses, and the two groups of red and green filter lenses are respectively mounted on the two groups of lens frames located at the front end of the lens bin, and are respectively arranged corresponding to the front ends of the two groups of lens barrels.

[0020] According to the portable visual function screening instrument provided by the present invention, the Worth 4-point sight mark lens group includes two groups of Worth 4-point sight mark lenses, and the two groups of Worth 4-point sight mark lenses are respectively mounted on the two groups of lens frames at the rear end of the lens bin, and are respectively arranged corresponding to the rear ends of the two groups of lens barrels.

[0021] According to the portable visual function screening instrument provided by the present invention, the stereoscopic sight mark lens group includes two groups of stereoscopic sight mark lenses, and the two groups of stereoscopic sight mark lenses are installed on the two groups of lens frames at the rear end of the lens bin, and are respectively arranged corresponding to the rear ends of the two groups of lens barrels.

[0022] According to the portable visual function screening instrument provided by the present invention, the polarized lens group includes two groups of polarized lenses, and the two groups of polarized lenses are respectively arranged on the two groups of lens frames at the front end of the lens chamber, and are respectively arranged corresponding to the front ends of the two groups of lens barrels;

[0023] Wherein, the stereoscopic sight mark lens and the polarized lens are located between the red and green filter lens and the Worth 4-point sight mark lens.

[0024] According to the portable visual function screening instrument provided by the present invention, the distance conversion lens set includes a +3.00D lens and a +0.17D lens, and the +3.00D lens and the +0.17D lens are both mounted on the lens frame located in the middle of the lens bin.

[0025] The present invention discloses the following technical effects:

[0026] Convenient and easy to operate: Existing binocular vision function testing equipment is usually large in size, complex in structure, and requires professional operation. The present invention is designed as a portable binocular structure, with a telescope-like appearance. The detection mode and test distance can be switched by simple button operation, making it easy for non-professional users to use.

[0027] Adaptable to multiple scenarios and wide coverage: Existing visual function testing equipment is mostly used in clinics or specialized optometry centers. The equipment is expensive and has high maintenance costs, making it unsuitable for families or primary medical institutions. The low cost and easy operation of the present invention make it not only suitable for family self-examination, but also widely used in schools, communities or public health censuses to meet the visual function screening needs in different scenarios.

[0028] Diverse functions and comprehensive detection: The present invention integrates the Worth 4-point test and stereoscopic detection modes, covering the preliminary screening of simultaneous vision, fusion vision and stereoscopic vision. Users can use one device to meet the detection needs of different distances (33 cm and 6 meters). Compared with the existing single-function devices, its detection function is more comprehensive.

[0029] Low cost and high popularity: Compared with traditional equipment, the manufacturing and maintenance costs of the present invention are greatly reduced, and it can be put on the market at a lower price, which meets the economic requirements of large-scale census and promotion. This will help to increase the popularity of binocular vision screening, especially in developing countries and regions, and reduce the risk of health problems caused by abnormal vision.

[0030] Hygiene and portability: The device is compact and easy to carry, and the binocular lenses are easy to clean and disinfect, meeting the hygiene standards for public health surveys. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of the portable visual function screening instrument of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the lens switching unit of the present invention.

[0034] Among them, 1. Lens compartment; 2. Lens barrel; 3. Mounting spindle; 4. Worth 4-point sight lens group; 5. Red and green filter lens group; 6. Distance conversion lens group; 7. Lens frame. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figure 1-Figure 2 The present invention provides a portable visual function screening instrument, comprising:

[0038] The lens chamber 1 has lens barrels 2 symmetrically mounted on both sides of the lens chamber 1, and the lens chamber 1 and the lens barrel 2 are connected; the lens chamber 1 and the lens barrel 2 in the present invention are both made of lightweight materials to improve the portability of the device;

[0039] The lens module switching system includes a mounting spindle 3 installed in the lens chamber 1, and a plurality of lens switching units are installed on the mounting spindle 3;

[0040] Worth 4-point test lens module, the Worth 4-point test lens module includes a red-green filter group 5 and a Worth 4-point sight mark lens group 4, the Worth 4-point sight mark lens group 4 is arranged at the rear end of the lens barrel 2, and the red-green filter group 5 is arranged at the front end of the lens barrel 2;

[0041] A stereoscopic vision function detection lens module, which includes a stereoscopic sight mark lens group and a polarization lens group. The stereoscopic sight mark lens group is arranged at the rear end of the lens barrel 2, and the polarization lens group is arranged at the front end of the lens barrel 2;

[0042] The distance conversion lens module includes two sets of distance conversion lens groups 6, which are respectively arranged at the middle position of the two sets of lens barrels 2, and the distance conversion lens group 6 is used to switch the visual distance between the Worth 4-point sight mark lens group 4 and the red and green filter lens group 5, and between the stereoscopic sight mark lens group and the polarization lens group to 33cm and / or 6m;

[0043] Among them, the red and green filter lens group 5, the Worth 4-point sight mark lens group 4, the stereoscopic sight mark lens group, the polarization lens group, and the distance conversion lens group 6 are respectively installed on a plurality of lens switching units.

[0044] A further optimized solution is that the lens switching unit includes a mounting ring rotatably connected to the mounting spindle 3, an annular groove is provided on the outer wall of the mounting ring, an outward-expanding spiral groove is provided in the annular groove, a connecting block is slidably connected in the outward-expanding spiral groove, a lens frame 7 is slidably connected in the lens bin 1, one end of the lens frame 7 is rotatably connected to the connecting block, and a control gear is rotatably connected to the other side of the mounting block, a through groove is provided on the outer wall of the lens bin 1, the control gear extends out of the lens bin 1 through the through groove, and the control gear is rotatably connected to the through groove.

[0045] According to a further optimization scheme, the red and green filter lens group 5 includes two groups of red and green filter lenses, which are respectively mounted on two groups of lens frames 7 located at the front end of the lens bin 1 and are respectively arranged corresponding to the front ends of the two groups of lens barrels 2.

[0046] According to a further optimization scheme, the Worth 4-point sight mark lens group 4 includes two groups of Worth 4-point sight mark lenses, which are respectively mounted on two groups of lens frames 7 at the rear end of the lens bin 1 and are respectively arranged corresponding to the rear ends of the two groups of lens barrels 2.

[0047] According to a further optimization scheme, the stereoscopic sight mark lens group includes two groups of stereoscopic sight mark lenses, and the two groups of stereoscopic sight mark lenses are installed on two groups of lens frames 7 at the rear end of the lens bin 1, and are respectively arranged corresponding to the rear ends of the two groups of lens barrels 2.

[0048] According to a further optimized solution, the polarized lens group includes two groups of polarized lenses, which are respectively arranged on two groups of lens frames 7 at the front end of the lens chamber 1 and are respectively arranged corresponding to the front ends of the two groups of lens barrels 2;

[0049] Among them, the stereoscopic sight mark lens and the polarized lens are located between the red and green filter lens and the Worth 4-point sight mark lens.

[0050] According to a further optimized solution, the distance conversion lens group 6 includes a +3.00D lens and a +0.17D lens, and both the +3.00D lens and the +0.17D lens are mounted on a lens frame 7 located in the middle of the lens compartment 1 .

[0051] A visual function screening method includes a Worth 4-point test method and a stereoscopic vision test method. The Worth 4-point test method includes the following steps:

[0052] S11, placing the device in front of the tester's eyes, and the lens switching unit switches the lens module so that the red and green filter lens group 5 and the Worth 4-point sight mark lens group 4 enter the front end and the rear end of the lens barrel 2 respectively;

[0053] S12, the distance conversion lens group 6 switches the visual distance between the Worth 4-point sight lens group 4 and the red and green filter lens group 5 to 33 cm and / or 6 m;

[0054] S13, the tester looks at the test mark of Worth 4-point sight mark set 4 and describes the number of points and colors seen;

[0055] S14, judging the simultaneous vision and fusion function of the binocular vision through the test subject's description. If the test subject describes seeing two red dots, three green dots or five visual marks, there may be visual abnormality. If the test subject describes that all dots are visible, the simultaneous vision and fusion function of the binocular vision is normal.

[0056] The stereoscopic vision test method comprises the following steps:

[0057] S21, placing the device in front of the tester's eyes, and the lens switching unit switches the lens module so that the stereoscopic sight mark lens group and the polarization lens group enter the lens barrel 2 and are located at the rear end and the front end of the lens barrel 2 respectively;

[0058] S22, the distance conversion lens group 6 switches the visual distance between the stereoscopic sight lens group and the polarization lens group to 33 cm and / or 6 m;

[0059] S23, the tester observes the pattern content and reports the visual perception based on his or her depth perception ability;

[0060] S24, judging whether the stereoscopic vision is normal based on the tester's reported vision. A tester with normal stereoscopic vision can perceive the stereoscopic effect of the visual mark pattern, whereas a tester with normal stereoscopic vision cannot perceive the stereoscopic effect.

[0061] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0062] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A portable visual function screening instrument, characterized in that: include: A lens chamber (1), wherein lens barrels (2) are symmetrically mounted on both sides of the lens chamber (1), and the lens chamber (1) and the lens barrel (2) are in communication; A lens module switching system, the lens module switching system comprising a mounting spindle (3) mounted in the lens chamber (1), a plurality of lens switching units being mounted on the mounting spindle (3); A Worth 4-point test lens module, the Worth 4-point test lens module comprising a red and green filter group (5) and a Worth 4-point sight mark lens group (4), the Worth 4-point sight mark lens group (4) being arranged at the rear end of the lens barrel (2), and the red and green filter group (5) being arranged at the front end of the lens barrel (2); A stereoscopic vision function detection lens module, the stereoscopic vision function detection lens module comprising a stereoscopic sight mark lens group and a polarization lens group, the stereoscopic sight mark lens group being arranged at the rear end of the lens barrel (2), and the polarization lens group being arranged at the front end of the lens barrel (2); A distance conversion lens module, the distance conversion lens module comprising two groups of distance conversion lens groups (6), the two groups of distance conversion lens groups (6) being respectively arranged at middle positions in the two groups of lens barrels (2), the distance conversion lens groups (6) being used to switch the visual distance between the Worth 4-point sight mark lens group (4) and the red and green filter lens group (5), and between the stereoscopic sight mark lens group and the polarization lens group to 33 cm and / or 6 m; The red and green filter lens group (5), the Worth 4-point sight mark lens group (4), the stereoscopic sight mark lens group, the polarization lens group, and the distance conversion lens group (6) are respectively installed on a plurality of the lens switching units.

2. A portable visual function screening instrument according to claim 1, characterized in that: The lens switching unit comprises a mounting ring rotatably connected to the mounting spindle (3); an annular groove is provided on the outer wall of the mounting ring; an outwardly expanding spiral groove is provided in the annular groove; a connecting block is slidably connected in the outwardly expanding spiral groove; a lens frame (7) is slidably connected in the lens bin (1); one end of the lens frame (7) is rotatably connected to the connecting block; the other side of the mounting block is rotatably connected to a control gear; a through groove is provided on the outer wall of the lens bin (1); the control gear extends out of the lens bin (1) through the through groove; and the control gear is rotatably connected to the through groove.

3. A portable visual function screening instrument according to claim 2, characterized in that: The red and green filter lens group (5) comprises two groups of red and green filter lenses, which are respectively mounted on two groups of lens frames (7) located at the front end of the lens bin (1) and are respectively arranged corresponding to the front ends of the two groups of lens barrels (2).

4. A portable visual function screening instrument according to claim 3, characterized in that: The Worth 4-point sight mark lens set (4) comprises two groups of Worth 4-point sight mark lenses, which are respectively mounted on two groups of lens frames (7) at the rear end of the lens bin (1) and are respectively arranged corresponding to the rear ends of the two groups of lens barrels (2).

5. A portable visual function screening instrument according to claim 4, characterized in that: The stereoscopic sight mark lens set comprises two groups of stereoscopic sight mark lenses, and the two groups of stereoscopic sight mark lenses are mounted on two groups of lens frames (7) at the rear end of the lens bin (1), and are respectively arranged corresponding to the rear ends of the two groups of lens barrels (2).

6. A portable visual function screening instrument according to claim 5, characterized in that: The polarized lens group comprises two groups of polarized lenses, the two groups of polarized lenses are respectively arranged on two groups of lens frames (7) at the front end of the lens chamber (1), and are respectively arranged corresponding to the front ends of the two groups of lens barrels (2); Wherein, the stereoscopic sight mark lens and the polarized lens are located between the red and green filter lens and the Worth 4-point sight mark lens.

7. A portable visual function screening instrument according to claim 6, characterized in that: The distance conversion lens group (6) comprises a +3.00D lens and a +0.17D lens, and the +3.00D lens and the +0.17D lens are both mounted on the lens frame (7) located in the middle of the lens bin (1).

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