Shielding device for vision test

Abstract

The utility model discloses a shielding device for vision testing, which comprises an eyeshade shell, a pivoting shielding plate and a restraint strap, the eyeshade shell is suitable for being worn on the head, and the eyeshade shell is provided with a first through hole and a second through hole corresponding to the eyes of a human body; the pivoting shielding plate is pivotally arranged on the front side of the eyeshade shell around a vertical axis and can pivot between a first position and a second position, and the rotating angle range between the first position and the second position is 180 degrees; when the pivot shielding plate is located at the first position, the pivot shielding plate shields the first through hole and opens the second through hole, and when the pivot shielding plate rotates to the second position, the pivot shielding plate opens the first through hole and shields the second through hole. The restraint strap is connected to the eyeshade shell and used for wearing and fixing the eyeshade shell to the head of the human body. The shielding device is compact in structure and convenient to operate, the sight shielding state of a single eye can be reliably controlled, multiple defects of a traditional handheld shielding object are overcome, and the single-eye vision testing quality and credibility are greatly improved.

Description

Technical Field

[0001] The utility model relates to vision testing tools, in particular to an occluder for vision testing. Background Art

[0002] Vision testing is an important way to evaluate people's visual function. And vision testing usually requires testing monocular vision. In order to test monocular vision, it is necessary to use an occluder to block the line of sight of one eye of the person being tested. Currently, some occluders are usually a flapper with a handle. During the testing process, the person being tested needs to hold the handle of the flapper by himself / herself and block the flapper in front of one eye to block the line of sight of that eye, so as to test the vision of the other eye alone.

[0003] However, when using such an occluder by hand, it is impossible to ensure that the distance between the flapper and the eye of the person being tested remains stable. Due to the limitations of the size and shape of the flapper, plus the possible displacement or tilt when holding it by hand, it may cause some visual field ranges of the eye being tested not to be completely blocked, so that the eye being tested can still capture some visual information, thus interfering with the accuracy of monocular vision testing and affecting the reliability of the test results. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the related art to some extent. For this purpose, the purpose of the utility model is to provide an occluder for vision testing.

[0005] To achieve the above purpose, according to an embodiment of the utility model, the occluder for vision testing includes:

[0006] An eye mask shell, which is adapted to be worn on the head, and the eye mask shell has a first through hole and a second through hole corresponding to the human eye;

[0007] A pivotable shutter, which is pivotably arranged on the front side of the eye mask shell around a vertical axis and can pivot between a first position and a second position, and the rotation angle range between the first position and the second position is 180°;

[0008] When the pivotable shutter is in the first position, the pivotable shutter blocks the first through hole and opens the second through hole. When the pivotable shutter rotates to the second position, the pivotable shutter opens the first through hole and shields the second through hole;

[0009] A restraint band, which is connected to the eye mask shell and is used to wear and fix the eye mask shell to the head of the human body.

[0010] According to the embodiment of the utility model, the shield for vision test includes an eye mask shell, a pivoting shield and a restraint belt. The eye mask shell can be worn on the head of the testee, and a through hole is opened at the position corresponding to the two eyes, namely, a first through hole and a second through hole, so that the two eyes can be exposed naturally. A pivoting shield that can pivot 180 degrees is set on the front side of the eye mask shell. The pivoting shield can accurately switch to block the first through hole or the second through hole corresponding to any eye, thereby completely blocking the line of sight of a single eye and realizing a true monocular vision test. When switching the monocular shielding, only the pivoting shield needs to be rotated, which is convenient and simple to use. At the same time, the restraint belt ensures the stability of the eye mask shell during the test, does not need to be held, the eye mask shell is in a stable position, and the pivoting shield is reliable in shielding, avoiding the influence of displacement on the test accuracy, and ensuring the accuracy and reliability of the test results. In general, the shield has a compact structure, is easy to operate, can reliably control the shielding state of the line of sight of a single eye, overcomes many defects of traditional handheld shielding objects, and greatly improves the quality and credibility of monocular vision test.

[0011] In addition, the occluder for vision testing according to the above embodiment of the utility model may also have the following additional technical features:

[0012] According to one embodiment of the utility model, the pivoting shield is pivotally connected to the eye mask shell via a rotating shaft, the rotating shaft and the pivoting shield are relatively fixed in the circumferential direction, and a toggle handle is connected to the upper end or the lower end of the rotating shaft, and the toggle handle is operated by a user to drive the pivoting shield to rotate from the first position to the second position.

[0013] According to an embodiment of the utility model, a separation portion is provided between the first through hole and the second through hole, and a connecting groove is provided on the separation portion, which passes through the first through hole and the second through hole in a horizontal direction;

[0014] The pivotable shielding plate comprises a shielding portion and a pivoting portion horizontally extending from the shielding portion, wherein the pivoting portion is located in the connecting groove and is pivotally connected to the eye mask shell through the rotating shaft;

[0015] When the pivoting shield is rotated to the first position, the shielding portion shields the first through hole, and the front surface of the pivoting shield is located on the same surface as the front surface of the eye mask shell;

[0016] When the pivotable shield is rotated to the second position, the shielding portion shields the second through hole, and the rear surface of the pivotable shield is located on the same surface as the front surface of the eye mask shell.

[0017] According to one embodiment of the utility model, the top wall of the connecting groove is provided with a first axial hole, the bottom wall of the connecting groove is provided with a second axial hole, the pivot portion is provided with a third axial hole, and the rotating shaft passes through the first axial hole, the third axial hole and the second axial hole.

[0018] According to one embodiment of the utility model, a step surface is provided in the first through hole and the second through hole, and when the pivoting shield is rotated to the first position, the rear surface of the pivoting shield stops on the step surface, and when the pivoting shield is rotated to the second position, the front surface of the pivoting shield stops on the step surface.

[0019] According to one embodiment of the utility model, the side of the pivoting shield has a protruding ear, and the front surface and the rear surface of the ear are provided with a magnet;

[0020] The side wall of the first through hole is provided with a first opening, and a first magnetic conductive metal sheet is provided in the first opening; the side wall of the second through hole is provided with a second opening, and a second magnetic conductive metal sheet is provided in the second opening; when the pivoting shield is rotated to the first position, the ear is located in the first opening and adsorbed to the first magnetic conductive metal sheet; when the pivoting shield is rotated to the second position, the ear is located in the second opening and adsorbed to the second magnetic conductive metal sheet.

[0021] According to an embodiment of the utility model, a first cavity and a second cavity are provided on the inner surface of the eye mask shell, the first through hole is communicated with the first cavity, and the second through hole is communicated with the second cavity.

[0022] According to an embodiment of the utility model, the restraint belt includes a first belt body and a second belt body, and the free ends of the first belt body and the second belt body are provided with Velcro that are bonded to each other.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of an obstruction device for vision testing (the pivoting shield is in the first position) according to an embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the shielding device for vision testing (the pivoting shielding plate is in the second position) according to an embodiment of the utility model;

[0027] Figure 3 This is an exploded view of the occluder for vision testing in an embodiment of the present utility model.

[0028] Reference numerals:

[0029] 10. Eyepatch shell;

[0030] 101. First magnetizable metal sheet;

[0031] 102. Second magnetizable metal sheet;

[0032] 103. Step surface;

[0033] H101. First through hole;

[0034] H102. Second through hole;

[0035] H103. First opening;

[0036] H104. Second opening;

[0037] H105. Connecting groove;

[0038] 20. Pivoting shutter;

[0039] 201. Occluding portion;

[0040] 202. Pivoting portion;

[0041] 2011. Ear portion;

[0042] 2012. Magnet member;

[0043] 203. Rotating shaft;

[0044] 204. Dialing handle;

[0045] 30. Restraining strap;

[0046] 301. First belt body;

[0047] 302. Second belt body.

[0048] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0049] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, but should not be construed as limiting the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0050] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present utility model and simplifying the description, 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 thus should not be construed as limiting the present utility model.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0052] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0053] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0054] The occluder for vision testing according to an embodiment of the present utility model will be described in detail below with reference to the accompanying drawings.

[0055] Referring Figures 1 to 3 As shown, the occluder for vision testing according to an embodiment of the present utility model includes an eye mask shell 10, a pivotable shutter 20 and a restraint strap 30.

[0056] Specifically, the eye mask shell 10 is adapted to be worn on the head, and the eye mask shell 10 is provided with a first through hole H101 and a second through hole H102 corresponding to the human eyes. The design form of the eye mask shell 10 is similar to a face mask, which can be worn on the head of the person to be tested, and a first through hole H101 and a second through hole H102 are respectively opened at positions corresponding to the two eyes, so that the two eyes of the person to be tested can be naturally exposed during the test.

[0057] The pivotable shutter 20 is pivotably provided on the front side of the eye mask shell 10 around a vertical axis and is pivotable between a first position and a second position, and the rotation angle range between the first position and the second position is 180°. When the pivotable shutter 20 is in the first position, the pivotable shutter 20 blocks the first through hole H101 and opens the second through hole H102, thereby completely shielding one eye of the person to be tested, and the line of sight of the other eye is unobstructed. When the pivotable shutter 20 rotates to the second position, the pivotable shutter 20 opens the first through hole H101 and shields the second through hole H102, so as to shield the eye that has completed the test and open the other eye for testing.

[0058] By switching the pivotable shutter 20 between two positions, the occluder can accurately control the occlusion of the line of sight of either eye, creating test conditions for monocular vision testing. At the same time, the design of the pivotable shutter 20 ensures that the distance between the pivotable shutter 20 and the occluded eye remains constant each time of occlusion, avoiding the problem of distance fluctuation existing in the case of holding an occluding object by hand. The structural design of the pivotable shutter 20 and the first through hole H101 and the second through hole H102 enables complete occlusion of the line of sight without any partial omission, greatly improving the accuracy of the test.

[0059] The restraint strap 30 is connected to the eye mask shell 10 and is used to wear and fix the eye mask shell 10 to the head of a human body. Through the restraint strap 30, the eye mask shell 10 can be firmly fixed to the head of the tested person, effectively avoiding the displacement of the eye mask shell 10 during the test and affecting the test quality. The material of the restraint strap 30 can be selected from high-quality fabrics, silica gels, etc., to ensure comfort and adjustability.

[0060] Before performing the monocular vision test, align the eye mask shell 10 with the face of the tested person so that the first through hole H101 and the second through hole H102 are respectively located at the positions of the two eyes of the tested person. Then wind the restraint strap 30 around the back of the tested person's head and adjust and fix it to ensure that the eye mask shell 10 can be firmly worn on the head without sliding or displacement.

[0061] After wearing is completed, the operator can control the pivoting shutter 20 to rotate to the corresponding position according to the eye to be tested. Suppose it is necessary to test the right eye vision of the tested person, then the operator should rotate the pivoting shutter 20 to the first position where it blocks the first through hole H101. At this time, the line of sight of the left eye of the tested person will be completely blocked, while the right eye can clearly observe the vision test target through the opened second through hole H102. In this state, the right eye is tested for vision.

[0062] After the right eye test is completed, to check the vision of the left eye of the tested person, simply rotate the pivoting shutter 20 by 180 degrees to the second position, and it can be switched to the state of blocking the second through hole H102 and exposing the first through hole H101. Subsequently, the left eye vision test of the tested person can be carried out.

[0063] According to the occluder for vision test provided by the embodiment of the present invention, it includes an eye mask shell 10, a pivoting shutter 20 and a restraint strap 30. The eye mask shell 10 can be worn on the head of the tested person, and a through hole is opened at each position corresponding to the two eyes, namely the first through hole H101 and the second through hole H102, so that the two eyes can be naturally exposed. A pivoting shutter 20 that can pivot 180 degrees is arranged on the front side of the eye mask shell 10. The pivoting shutter 20 can accurately switch to block the first through hole H101 or the second through hole H102 corresponding to either eye, thereby completely blocking the line of sight of a single eye and realizing a true monocular vision test. When switching the monocular occlusion, only need to rotate the pivoting shutter 20, which is convenient and simple to use; at the same time, the restraint strap 30 ensures the stability of the eye mask shell 10 during the test, without the need to hold it by hand. The position of the eye mask shell 10 is stable, and the pivoting shutter 20 blocks reliably, avoiding affecting the test accuracy due to displacement and ensuring the accuracy and reliability of the test results. Generally speaking, this occluder has a compact structure and convenient operation, can reliably control the line of sight occlusion state of a single eye, overcomes many defects of traditional hand-held occluders, and greatly improves the quality and credibility of monocular vision tests.

[0064] In one embodiment of the present invention, the pivoting shield 20 is pivotally connected to the eye mask shell 10 via a rotating shaft 203, the rotating shaft 203 and the pivoting shield 20 are relatively fixed in the circumferential direction, and a toggle handle 204 is connected to the upper end or the lower end of the rotating shaft 203, and the toggle handle 204 is operated by the user to drive the pivoting shield 20 to rotate from the first position to the second position.

[0065] In order to facilitate the user to operate and switch the position of the pivoting shield 20, this embodiment is equipped with a toggle handle 204 at the upper end or the lower end of the rotating shaft 203. The design shape of the toggle handle 204 can be a strip or other structure that is convenient for hand holding, and the material can be metal, plastic, etc. The toggle handle 204 is firmly connected to the rotating shaft 203. When the user manually pushes and pulls the handle, the entire rotating shaft 203 and the pivoting shield 20 can be driven to rotate.

[0066] In other words, by providing the toggle handle 204, the user does not need to directly operate the pivoting shield 20, but can flexibly control the pivoting shield 20 to switch between the first position and the second position by simply toggling the handle 204. The design of the toggle handle 204 makes the rotation operation of the pivoting shield 20 more convenient, avoids the inconvenience of directly operating the pivoting shield 20, and greatly improves the practicality and operability of the shield. At the same time, the design of the toggle handle 204 also makes the overall structure of the shield more compact.

[0067] In one embodiment of the present invention, a separation portion is provided between the first through hole H101 and the second through hole H102, and a connecting groove H105 is provided on the separation portion and passes through the first through hole H101 and the second through hole H102 in a horizontal direction.

[0068] The pivotable shielding plate 20 includes a shielding portion 201 and a pivoting portion horizontally extending from the shielding portion 201 . The pivoting portion is located in the connecting groove H105 and is pivotally connected to the eye mask shell 10 through the rotating shaft 203 .

[0069] When the pivoting shield is rotated to the first position, the shielding portion 201 shields the first through hole H101, and the front surface of the pivoting shield is located on the same surface as the front surface of the eye mask shell 10. When the pivoting shield is rotated to the second position, the shielding portion 201 shields the second through hole H102, and the rear surface of the pivoting shield is located on the same surface as the front surface of the eye mask shell 10.

[0070] In this embodiment, the first through-hole H101 and the second through-hole H102 are connected through a communication groove H105. On the one hand, it enables the pivoting shutter 20 to be more conveniently pivotally connected to the eyecup housing 10, and ensures that the pivoting shutter 20 can rotate flexibly and reliably within a limited space. At the same time, the co-planar design of the shielding portion 201 and the front surface of the eyecup housing 10 completely eliminates the unevenness on the overall appearance, so that the shutter can present an integral appearance in any use state.

[0071] In an embodiment of the present utility model, a first shaft hole is provided on the top wall of the communication groove H105, a second shaft hole is provided on the bottom wall of the communication groove H105, a third shaft hole is provided on the pivoting portion 202, and the rotating shaft 203 passes through the first shaft hole, the third shaft hole and the second shaft hole.

[0072] In this embodiment, the rotating shaft 203 accurately passes through the first shaft hole, the second shaft hole and the third shaft hole to pivotally connect with the eyecup housing 10, ensuring a reliable connection between the pivoting shutter 20 and the eyecup housing 10. The pivoting shutter 20 can maintain stable and efficient rotation for a long time, so as to ensure accurate switching between blocking the first through-hole H101 or the second through-hole H102 every time. Moreover, this structure is simple and reliable with a long service life.

[0073] In an embodiment of the present utility model, a stepped surface 103 is provided in the first through-hole H101 and the second through-hole H102. When the pivoting shutter rotates to the first position, the rear surface of the pivoting shutter abuts against the stepped surface 103. When the pivoting shutter rotates to the second position, the front surface of the pivoting shutter abuts against the stepped surface 103. In this way, whether the pivoting shutter rotates to the first position or the second position, the shielding portion 201 on the pivoting shutter can abut against the stepped surface 103, stably and completely closing the first through-hole H101 or the second through-hole H102, avoiding displacement, shaking, light leakage and other situations, thus ensuring the thoroughness of the shielding. At the same time, the pivoting shutter 20 and the front surface of the eyecup housing 10 can also be kept on the same surface, thereby maintaining the overall flat appearance.

[0074] In an embodiment of the present utility model, the side surface of the pivoting shutter has a protruding ear portion 2011, and magnet members 2012 are provided on both the front surface and the rear surface of the ear portion 2011, and the magnet members 2012 make both the front and rear surfaces of the ear portion 2011 have magnetic adsorption effects.

[0075] The side wall of the first through hole H101 is provided with a first opening H103, and a first magnetically permeable metal sheet 101 is arranged in the first opening H103. The side wall of the second through hole H102 is provided with a second opening H104, and a second magnetically permeable metal sheet 102 is arranged in the second opening H104. The first magnetically permeable metal sheet 101 and the second magnetically permeable metal sheet 102 can be made of iron sheets or the like.

[0076] When the pivotable shutter rotates to the first position, the ear portion 2011 is located in the first opening H103 and adsorbs to the first magnetically permeable metal sheet 101. When the pivotable shutter rotates to the second position, the ear portion 2011 is located in the second opening H104 and adsorbs to the second magnetically permeable metal sheet 102.

[0077] That is to say, when the pivotable shutter 20 rotates to the first position, the shielding portion 201 will shield the first through hole H101. At the same time, the ear portion 2011 of the pivotable shutter 20 will be accurately clamped into the first opening H103. Due to the magnetic attraction between the magnet member 2012 on the surface of the ear portion 2011 and the first magnetically permeable metal sheet 101, the two will automatically adsorb together, thereby firmly locking the pivotable shutter 20 in the first position and preventing accidental displacement. Similarly, when the pivotable shutter 20 rotates to the second position, the ear portion 2011 will be clamped into the second opening H104 and adsorb to the second magnetically permeable metal sheet 102, thereby achieving reliable locking of the second position.

[0078] In this embodiment, the magnetic adsorption method is adopted. Whenever the pivotable shutter 20 needs to be fixed at the position of shielding the first through hole H101 or the second through hole H102, its ear portion 2011 will be reliably locked in the corresponding first opening H103 or second opening H104, ensuring the reliability of shielding. At the same time, this magnetic adsorption design also brings great convenience to the operation of the user. After each switching of the shielding position, the pivotable shutter 20 will be automatically locked in the required state, and the user does not need to perform additional fixing operations, which is simple and convenient to use and improves the efficiency of vision testing.

[0079] In an embodiment of the present utility model, the inner surface of the eye mask shell 10 is provided with a first cavity and a second cavity. The first through hole H101 communicates with the first cavity, and the second through hole H102 communicates with the second cavity.

[0080] By providing a first cavity and a second cavity inside the blindfold shell 10, it actually creates more space around the eyes of the person being tested. This not only helps relieve the tightness of the eyes when wearing, but also avoids inappropriate contact and friction between parts such as the eyelids and eyebrows and the inner surface of the blindfold shell 10. Thus, the overall wearing comfort of the occluder is significantly improved. In addition, the cavity design in this embodiment can leave necessary movement space for the eyes, effectively reducing the discomfort in the eyes during the vision examination, enabling the person being tested to maintain a relatively relaxed and natural state, and avoiding affecting the credibility of the vision test data due to nervousness.

[0081] In some embodiments of the present invention, the restraint strap 30 includes a first strap body 301 and a second strap body 302. The free ends of the first strap body 301 and the second strap body 302 are provided with Velcro that adheres to each other. Using the connection method of Velcro is convenient and simple without the need for complex operations, and it can adapt to different testers, greatly improving the wearing convenience and adaptability.

[0082] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0083] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made using the description of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. An occluder for vision testing, characterized in that, include: An eye mask shell, wherein the eye mask shell is suitable for being worn on the head and has a first through hole and a second through hole corresponding to the human eye; A pivoting shield, the pivoting shield is pivotally disposed on the front side of the eye mask shell around a vertical axis and is pivotable between a first position and a second position, wherein the rotation angle range between the first position and the second position is 180°; When the pivoting shutter is located at the first position, the pivoting shutter blocks the first through hole and opens the second through hole, and when the pivoting shutter rotates to the second position, the pivoting shutter opens the first through hole and blocks the second through hole; A restraint belt is connected to the eye mask shell and is used for fixing the eye mask shell to the head of a human body when worn.

2. The occluder for vision test according to claim 1, wherein, The pivotable shield is pivotally connected to the eye mask shell via a rotating shaft, the rotating shaft and the pivotable shield are relatively fixed in the circumferential direction, and a toggle handle is connected to the upper end or the lower end of the rotating shaft, and the toggle handle is operated by a user to drive the pivotable shield to rotate from the first position to the second position.

3. The occluder for vision test according to claim 2, wherein A separation portion is provided between the first through hole and the second through hole, and a connecting groove is provided on the separation portion and passes through the first through hole and the second through hole in a horizontal direction; The pivotable shielding plate comprises a shielding portion and a pivoting portion horizontally extending from the shielding portion, wherein the pivoting portion is located in the connecting groove and is pivotally connected to the eye mask shell through the rotating shaft; When the pivoting shield is rotated to the first position, the shielding portion shields the first through hole, and the front surface of the pivoting shield is located on the same surface as the front surface of the eye mask shell; When the pivotable shield is rotated to the second position, the shielding portion shields the second through hole, and the rear surface of the pivotable shield is located on the same surface as the front surface of the eye mask shell.

4. The occluder for vision test according to claim 3, characterized in that, The top wall of the communicating groove is provided with a first axial hole, the bottom wall of the communicating groove is provided with a second axial hole, the pivoting portion is provided with a third axial hole, and the rotating shaft passes through the first axial hole, the third axial hole and the second axial hole.

5. The occluder for vision test according to claim 3, wherein, A step surface is provided in the first through hole and the second through hole. When the pivoting shield is rotated to the first position, the rear surface of the pivoting shield stops on the step surface. When the pivoting shield is rotated to the second position, the front surface of the pivoting shield stops on the step surface.

6. The occluder for vision test according to claim 3, wherein, The side of the pivoting shield has a protruding ear portion, and the front surface and the rear surface of the ear portion are both provided with a magnet member; The side wall of the first through hole is provided with a first opening, and a first magnetic conductive metal sheet is provided in the first opening; the side wall of the second through hole is provided with a second opening, and a second magnetic conductive metal sheet is provided in the second opening; when the pivoting shield is rotated to the first position, the ear is located in the first opening and adsorbed to the first magnetic conductive metal sheet; when the pivoting shield is rotated to the second position, the ear is located in the second opening and adsorbed to the second magnetic conductive metal sheet.

7. The occluder for vision test according to claim 1, characterized in that, The inner surface of the eye mask shell is provided with a first cavity and a second cavity, the first through hole is communicated with the first cavity, and the second through hole is communicated with the second cavity.

8. The occluder for vision test according to claim 1, characterized in that, The restraint strap includes a first strap body and a second strap body, and Velcro fasteners that are adhesively bonded to each other are provided at the free ends of the first strap body and the second strap body.

Images