Visual acuity examination display tool, visual acuity examination system, visual acuity examination kit, control device, and program

Abstract

To perform a visual acuity test with high accuracy so as to be easily understood even by a child or the like.SOLUTION: A visual acuity examination display tool 20 includes a display tool body 21 and a visual acuity examination mark 100 displayed on the display tool body 21, and the visual acuity examination mark 100 includes a mark part 101 which can be recognized by an examination object person including a child, and a notch part 105 which is formed in a part of the mark part 101 and indicates a minimum separation threshold.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a visual acuity test display device, a visual acuity test system, a visual acuity test kit, a control device, and a program. [Background technology]

[0002] Amblyopia, with a reported prevalence of approximately 3%, is a common condition encountered in clinical ophthalmology. Amblyopia is a condition in which corrected visual acuity does not reach 0.8 even with glasses or contact lenses, despite the absence of any organic disease. Visual acuity typically develops gradually from approximately 0.02 at birth, reaching 1.0 by around age 3. Early and accurate measurement of children's visual acuity is important for the treatment of amblyopia, the prevention of myopia in younger children, and other pediatric ophthalmological diseases. For this reason, for example, in Japan, visual acuity tests are conducted on approximately 870,000 three-year-old children annually during health checkups. For example, Patent Document 1 discloses a configuration in which letters, numbers, pictures, and marks are used in addition to Landolt rings when conducting a visual acuity test. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7106024 Summary of the Invention [Problem to be solved by the invention]

[0004] However, visual acuity tests using Landolt rings are often difficult for children, especially those aged 3, to understand, and may not be able to provide highly accurate visual acuity tests. Furthermore, visual acuity tests using pictorial targets such as letters, numbers, pictures, and marks do not use the minimum separation thresholds specified by ISO (International Organization for Standardization) or JIS (Japanese Industrial Standards), and therefore cannot provide highly accurate visual acuity measurements.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide a visual acuity test display device, a visual acuity test system, a visual acuity test kit, a control device, and a program that are easy for children and others to understand and that enable visual acuity tests to be performed with high accuracy. [Means for solving the problem]

[0006] A visual acuity test display device according to one embodiment of the present invention comprises a display device main body and a visual acuity test mark displayed on the display device main body, the visual acuity test mark having a mark portion recognizable by test subjects, including children, and a notch portion formed in part of the mark portion and indicating a minimum separation threshold.

[0007] In addition, in a visual acuity test display device according to one aspect of the present invention, the visual acuity test mark and a comparison mark consisting only of the mark portion are displayed side by side on the display device main body.

[0008] In the visual acuity test display device according to one aspect of the present invention, the mark portion shows the shape of an item that attracts the interest of children.

[0009] In the visual acuity test display device according to one aspect of the present invention, the mark portion represents the shape of an article other than a Landolt ring.

[0010] In the visual acuity test display device according to one aspect of the present invention, a part of the mark portion includes a Landolt ring.

[0011] In a visual acuity test display device according to one aspect of the present invention, the display device main body displays a plurality of the visual acuity test marks of different sizes.

[0012] In addition, in the visual acuity test display device according to one aspect of the present invention, the display device main body displays a plurality of different types of the visual acuity test marks.

[0013] In addition, in a visual acuity test display device according to one embodiment of the present invention, the cutout portion is a rectangular recess recessed from the outer edge of the mark portion to the inside of the mark portion, or a slit formed across a portion of the mark portion.

[0014] In addition, in a visual acuity test display device according to one aspect of the present invention, the cutout portion has a dimension S1 in a first direction along the surface of the display device main body and a dimension S2 in a second direction along the surface of the display device main body that intersects with the first direction, S1:S2=1.00:1.04 is.

[0015] In a visual acuity test display device according to one aspect of the present invention, the display device main body is a monitor device that displays the visual acuity test mark.

[0016] In the visual acuity test indicator according to one aspect of the present invention, the indicator body is a sheet on which the visual acuity test marks are printed.

[0017] The vision testing system of the present invention comprises a vision test display device as described above, and a control device that causes the vision test display device to display the vision test marks, and the control device comprises a memory unit in which data for a plurality of the vision test marks is stored, an input receiving unit that receives input from outside specifying some of the plurality of vision test marks, and a display control unit that causes the vision test display device to display the specified some of the plurality of vision test marks based on the input from outside.

[0018] The vision test kit of the present invention includes a vision test display device as described above, and an instruction display device showing the placement of the vision test marks and the comparison marks displayed on the display device body.

[0019] The control device of the present invention is a control device that displays the vision test marks on a vision test display device such as described above, and is equipped with a memory unit in which data for a plurality of the vision test marks is stored, an input receiving unit that receives input from outside specifying some of the plurality of vision test marks, and a display control unit that displays the specified some of the plurality of vision test marks on the vision test display device based on the input from outside.

[0020] The program of the present invention causes the control device described above to execute processing including the steps of receiving input from the outside specifying some of the plurality of vision test marks, and displaying the specified some of the plurality of vision test marks on the vision test display device based on the input from the outside. [Effects of the Invention]

[0021] The visual acuity test display device, visual acuity test system, visual acuity test kit, control device, and program of the present invention are easy to understand even for children and the like, and enable visual acuity tests to be performed with high accuracy. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a diagram showing a schematic configuration of a visual acuity testing system and a visual acuity test display device according to an embodiment of the present invention. [Figure 2] 10A and 10B are diagrams showing examples of visual acuity test marks and comparison marks displayed on the visual acuity test display device of the visual acuity testing system. [Figure 3] 10A and 10B are diagrams showing other examples of the eyesight test mark and the comparison mark. [Figure 4]10A and 10B are diagrams showing other examples of the eyesight test mark and the comparison mark. [Figure 5] 10A and 10B are diagrams showing other examples of the eyesight test mark and the comparison mark. [Figure 6] 10A and 10B are diagrams showing other examples of the eyesight test mark and the comparison mark. [Figure 7] FIG. 2 is a block diagram showing the hardware configuration of a control device of the above-mentioned vision testing system. [Figure 8] FIG. 2 is a functional block diagram showing the functional configuration of a control device of the above-mentioned vision testing system. [Figure 9] 3 is a flowchart showing the procedure of a control method for the vision testing system according to the embodiment of the present invention. [Figure 10] 1A and 1B are diagrams showing an instruction display device of a vision test kit according to an embodiment of the present invention. [Figure 11] FIG. 10 is a diagram showing still another example of the eyesight test mark and the comparison mark. [Figure 12] FIG. 10 is a diagram showing still another example of the eyesight test mark and the comparison mark. [Figure 13] FIG. 10 is a diagram showing still another example of the eyesight test mark and the comparison mark. [Figure 14] FIG. 10 is a diagram showing still another example of the eyesight test mark and the comparison mark. [Figure 15] FIG. 10 is a diagram showing still another example of the eyesight test mark and the comparison mark. [Figure 16] FIG. 10 is a diagram showing still another example of the eyesight test mark and the comparison mark. [Figure 17] FIG. 10 is a diagram showing still another example of the eyesight test mark and the comparison mark. [Figure 18] FIG. 10 is a diagram showing a schematic configuration of a visual acuity test indicator according to a modified example of an embodiment of the present invention. [Figure 19] FIG. 10 is a diagram showing a schematic configuration of a visual acuity test indicator according to a modified example of an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments for carrying out the visual acuity test display device, visual acuity test system, visual acuity test kit, control device, and program according to the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to these embodiments. (Configuration of the vision testing system) As shown in FIG. 1, the vision testing system 10 includes a vision test display device (vision test display device) 20 and a control device 60. This vision testing system 10 tests children and others who have difficulty understanding Landolt rings in vision tests using Landolt rings. The vision testing system 10 is not limited to children, and may also test people with intellectual disabilities, for example. In other words, the subjects of vision tests using the vision testing system 10 include children.

[0024] (Configuration of visual acuity test display device) The display device 20 for a visual acuity test includes a display device main body (display device main body) 21 and a visual acuity test mark 100 displayed on the display device main body 21. The display device main body 21 is a monitor device such as a liquid crystal monitor, and displays the visual acuity test marks 100 based on data output from the control device 60. The display device main body 21 is installed a predetermined distance away from the test position where the subject takes the test.

[0025] (Configuration of the visual acuity test mark) The vision test mark 100 is displayed on the display screen of the display device main body 21. As shown in FIGS. 1 and 2, the vision test mark 100 has a mark portion 101A and a notch portion 105.

[0026] The mark section 101A is formed in a shape that can be recognized by test subjects, including children. The mark section 101A is, for example, a pictorial target using an icon, pictogram, or the like, which indicates the shape of an object that children are interested in. Examples of objects that children are interested in include living things, vehicles, food, flowers, trees, the sun, and the moon. Objects that children are interested in other than those exemplified here may also be used. In this embodiment, the mark section 101A has a shape that resembles, for example, a whale. This mark section 101A indicates the shape of an object other than a Landolt ring.

[0027] The notch 105 is formed in a part of the mark portion 101A. The notch 105 indicates the minimum separation threshold required for the visual acuity test. In this embodiment, the notch 105 is, for example, a rectangular recess recessed from the outer edge of the mark portion 101A to the inside of the mark portion 101A. The notch 105 has a dimension S1 in a first direction along the surface of the display device main body 21 and a dimension S2 in a second direction intersecting the first direction along the surface of the display device main body 21, S1:S2=1.00:1.04 The notch 105 formed with such a dimensional ratio has a minimum separation threshold for a visual acuity test. The notch 105 has a minimum separation threshold equivalent to the gap of a Landolt ring that satisfies the requirements specified by ISO and JIS.

[0028] Such eyesight test marks 100 are displayed on the display screen of the display device main body 21 based on data output from a control device 60, which will be described later.

[0029] (Configuration of comparison marks) The visual acuity test display device 20 displays a comparison mark 200 alongside the visual acuity test mark 100. The comparison mark 200 consists of only the mark portion 101A of the visual acuity test mark 100. In other words, the comparison mark 200 does not have the cutout portion 105. The comparison mark 200 is the same size as the mark portion 101A of the visual acuity test mark 100. The visual acuity test mark 100 and the comparison mark 200 are arranged side by side on the display screen of the display device main body 21, for example.

[0030] The mark portion 101A of the vision test mark 100 and the comparison mark 200 is not limited to the above-mentioned whale-shaped mark portion, but may be, for example, a mark portion 101B shaped like a dog as shown in FIG. 3, a mark portion 101C shaped like an ice cream as shown in FIG. 4, a mark portion 101D shaped like a balloon as shown in FIG. 5, or a mark portion 101E shaped like an apple as shown in FIG. 6, etc.

[0031] (Control device configuration) FIG. 7 is a diagram illustrating a hardware configuration of the control device. 7, the control device 60 is a computer including various hardware components such as a CPU 61, a ROM 62, a RAM 63, a storage 64 such as a hard disk drive (HDD), and a communication module 65. For example, a personal computer, a tablet terminal, or a smartphone can be used as the control device 60. The control device 60 may also be provided with a dedicated controller.

[0032] FIG. 8 is a functional block diagram showing the functional configuration of the control device. As shown in FIG. 8, the control device 60 is functionally equipped with a memory unit 70, an input receiving unit 71, a display control unit 73, and an output unit 74, by the CPU 61 executing a program stored in advance in the device.

[0033] The memory unit 70 is a hardware storage device. The memory unit 70 stores data on a plurality of vision test marks 100 and comparison marks 200 to be displayed on the display device main body 21 of the vision test display device 20. The memory unit 70 stores data on a plurality of vision test marks 100 and comparison marks 200 of different sizes for measuring vision. Here, the mark portions 101A-101E of the vision test marks 100 and comparison marks 200 have a plurality of sizes corresponding to the level of vision. The cutout portion 105 of the vision test mark 100 has a plurality of sizes corresponding to the level of vision. In other words, the vision test marks 100 and comparison marks 200 are formed in similar shapes and have sizes corresponding to the level of vision. The memory unit 70 also stores data on a plurality of types of mark portions 101A-101E representing different objects as the vision test marks 100 and comparison marks 200.

[0034] The input receiving unit 71 receives signals input from external operating means (not shown), such as a mouse, keyboard, touchpad, or switch, connected to the control device 60. The external operating means, such as a mouse, keyboard, touchpad, or switch, is operated by a doctor or the like who performs a visual acuity test on a child. When performing a visual acuity test on a child, the doctor or the like performs an operation to designate some of the visual acuity test marks 100 and comparison marks 200 from the plurality of visual acuity test marks 100 and comparison marks 200 stored in the memory unit 70. In order to determine whether the child, who is the subject of the test, can see the notch 105 or not, the doctor or the like designates some of the visual acuity test marks 100 and comparison marks 200 from the plurality of visual acuity test marks 100 and comparison marks 200, which vary in size depending on the child's visual acuity. In addition, in order to prevent children from getting bored with the test, doctors and others may specify, from among the multiple types of vision test marks 100 and comparison marks 200, vision test marks 100 and comparison marks 200 having different types of mark portions 101A to 101E.

[0035] The display control unit 73 outputs data for displaying, on the display device main body 21, a specified portion of the plurality of visual acuity test marks 100 and comparison marks 200 stored in the memory unit 70, based on a signal that is input from outside when a doctor or the like operates the operating means and that is received by the input receiving unit 71. The display control unit 73 also randomly switches the left and right positions of the visual acuity test marks 100 and comparison marks 200 and displays them side by side on the display device main body 21. The output unit 74 transmits the data output from the display control unit 73 to the display device main body 21.

[0036] (Processing Procedure) As shown in FIG. 9, the control device 60 executes a process including step S11 of receiving an input specifying a visual acuity test mark, and step S12 of displaying the specified visual acuity test mark.

[0037] In step S11, which accepts input specifying the visual acuity test marks, when a doctor or other person performing a visual acuity test on a child uses an external operating means to specify the visual acuity test marks 100 and the comparison marks 200 to be displayed on the display device main body 21, the input accepting unit 71 accepts the signal input from the operating means (not shown).

[0038] In step S12 of displaying the designated visual acuity test marks, the display control unit 73 outputs data for displaying the designated part of the visual acuity test marks 100 and comparison marks 200 among the plurality of visual acuity test marks 100 and comparison marks 200 stored in the memory unit 70, based on the signal received by the input receiving unit 71 in step S11. The output data is sent to the display device main body 21 by the output unit 74.

[0039] The display device main body 21 receives the data from the output unit 74 and displays the designated eyesight test mark 100 and comparison mark 200 on the display screen based on the received data.

[0040] The doctor shows the vision test mark 100 and the comparison mark 200 displayed on the display device main body 21 to the child being tested, and asks which mark has the notch 105, for example, by asking, "Which elephant has its mouth open?" If the child can see the notch 105, the child informs the doctor which of the two marks displayed on the display device main body 21 has the notch 105 by pointing with their finger, etc. If the child cannot see the notch 105, the child answers, "I don't know," etc. This allows the doctor to easily determine whether the child can visually recognize the difference (presence or absence of the notch 105) between the vision test mark 100 displayed on the display device main body 21 and the comparison mark 200.

[0041] Here, if the subject points with his / her finger at which of two marks displayed on the display device main body 21, which is provided at a position distant from the subject, has the notch 105, the doctor may not be able to accurately determine which mark the subject is pointing to. For this reason, for example, an instruction display device 50 as shown in Fig. 10 may be used. This instruction display device 50, together with the above-mentioned visual acuity test display device 20, constitutes a visual acuity test kit 30.

[0042] The instruction display device 50 includes a display device main body 51 and an instruction mark 300. The display device main body 51 is, for example, sheet-shaped and made of a printable material such as paper or resin. The instruction mark 300 is displayed by being printed on the surface of the display device main body 51. The display device main body 51 may be a tablet terminal, a monitor device, or the like placed at the hand of a doctor or a subject. When the display device main body 51 is a tablet terminal, a monitor device, or the like, the instruction mark 300 is displayed on the display screen of the display device main body 51.

[0043] The instruction marks 300 indicate on the display device main body 51 the arrangement of the vision test marks 100 and the comparison marks 200 displayed on the display device main body 21. That is, the display device main body 51 displays the instruction marks 300 imitating the vision test marks 100 and the comparison marks 200 in the same number and arrangement as the vision test marks 100 and the comparison marks 200. In this embodiment, two instruction marks 300 are displayed side by side on the display device main body 51, corresponding to the vision test marks 100 and the comparison marks 200, similar to the vision test marks 100 and the comparison marks 200. Here, it is preferable that the instruction marks 300 have the same shape as either the vision test marks 100 or the comparison marks 200. In the example of FIG. 10 , each of the two instruction marks 300 arranged side by side has the same shape as the vision test marks 100 having the cutout portion 105. Each of the two instruction marks 300 arranged side by side may have the same shape as the comparison mark 200 .

[0044] When the doctor presents such an instruction display device 50 to the subject, the subject indicates which of the two marks displayed on the display device main body 21 has the notch 105 by pointing with his / her finger at one of the two instruction marks 300 displayed on the instruction display device 50. In this way, the subject uses the instruction display device 50 to indicate which of the two marks displayed on the display device main body 21, which is provided at a distance from the subject, has the notch 105, allowing the doctor to accurately know which mark the subject is pointing at.

[0045] The doctor uses the operating means to input an operation to display on the display device main body 21 other vision test marks 100 and comparison marks 200 of different sizes depending on the visual recognition status of the subject, i.e., the difference between the vision test mark 100 and the comparison mark 200 (presence or absence of the notch 105). The control device 60 then sequentially performs steps S11 and S12 as described above, and displays on the display device main body 21 other vision test marks 100 and comparison marks 200 of different sizes as specified by the doctor. At this time, the doctor may display marks having different types of mark portions 101A-101E from the vision test marks 100 and comparison marks 200 displayed immediately before, in order to prevent the child subject from getting bored with the test. The doctor repeats this procedure until the subject's visual acuity is measured.

[0046] (Action and effect) In the visual acuity test display device 20, visual acuity test system 10, and control device 60 configured as described above, a visual acuity test mark 100 having a mark portion 101A that can be recognized by test subjects, including children, and a notch portion 105 that is formed in part of the mark portion 101A and indicates a minimum separation threshold, is displayed on the display device main body 21. This makes it easy for children and others to understand, and enables a visual acuity test to be performed with high accuracy.

[0047] Furthermore, the display device main body 21 displays the visual acuity test mark 100 and the comparison mark 200 consisting only of the mark portion 101A side by side. This eliminates the need for the test subject to answer the direction of the slit in the Landolt ring, such as up, down, left, or right, as in a visual acuity test using a Landolt ring. The test subject only needs to point to the mark with the notch portion 105 of the two side-by-side marks (the visual acuity test mark 100 and the comparison mark 200), for example, using the pointing device 50. This also makes the visual acuity test easy to understand, even for children, and enables a highly accurate visual acuity test.

[0048] (Modification of the embodiment) In the above embodiment, the vision test mark 100 and the comparison mark 200 have multiple types of mark portions 101A to 101E, but the mark portions of the vision test mark 100 and the comparison mark 200 may be other than these.

[0049] For example, as shown in FIG. 11, the mark portion 101F of the vision test mark 100 and the comparison mark 200 may resemble a banana being cut with a knife.

[0050] As shown in FIG. 12, the mark portion 101G of the eyesight test mark 100 and the comparison mark 200 may be shaped like a rice ball.

[0051] As shown in FIG. 13, the mark portion 101H of the eyesight test mark 100 and the comparison mark 200 may be shaped like an insect cage.

[0052] As shown in FIG. 14, the mark portion 101I of the eyesight test mark 100 and the comparison mark 200 may be shaped like a tree.

[0053] Here, in the vision test mark 100 illustrated in Figures 11 to 15, the notch portion 105 indicating the minimum separation threshold is not a recess recessed from the outer edge of the mark portions 101A to 101E as shown in the above embodiment, but a slit formed across the line 102 forming the mark portions 101F to 101I.

[0054] (Another modified example of the embodiment) 15, the mark portion 101J of the vision test mark 100 and the comparison mark 200 resembles a whale, and a line 102J extending in an arc shape. The cutout portion 105 of the vision test mark 100 is a slit formed to cross the arc-shaped line 102J. As a result, the vision test mark 100 having such a mark portion 101J has a configuration that includes a C-shaped Landolt ring in part.

[0055] (Still another modification of the embodiment) In the above embodiment, the visual acuity test mark 100 and the comparison mark 200 are displayed side by side on the display screen of the display device main body 21, but this is not limiting. For example, one visual acuity test mark 100 and two or more comparison marks 200 may be displayed side by side on the display screen of the display device main body 21, and the test subject may point to the visual acuity test mark 100 when the subject sees the visual acuity test mark 100 with the notch 105 formed therein among the three or more marks, thereby conducting the test.

[0056] (Still another modification of the embodiment) Furthermore, in the above embodiment, the eyesight test mark 100 and the comparison mark 200 having the mark portions 101A to 101J of the same shape are displayed side by side, but the present invention is not limited to this. 16, for example, a vision test mark 100 has a mark portion 101K that resembles an automobile. In such a vision test mark 100, for example, of the two wheels 103A and 103B that the mark portion 101K has, one wheel 103A has a notch portion 105, and the other wheel 103B does not have a notch portion 105. In other words, the other wheel 103B functions as a comparison mark. When the subject can see the notch 105, he or she points to the wheel of the two wheels 103A, 103B that has the notch 105 formed therein. The wheel 103A having the notch 105 formed therein is a Landolt ring. In other words, a part of the mark portion 101K of the vision test mark 100 includes a Landolt ring. Even with such a vision test mark 100, the person being tested can take the vision test while comparing the wheel 103A in which the notch 105 is formed with the wheel 103B in which the notch 105 is not formed.

[0057] 17, the vision test mark 100 has a mark portion 101L that resembles a locomotive. In such a vision test mark 100, for example, of the two wheels 104A and 104B that the mark portion 101L has, one wheel 104A has a notch portion 105, and the other wheel 104B, which functions as a comparison mark, does not have a notch portion 105. Even with such a vision test mark 100, the person being tested can take the vision test while comparing the wheel 104A in which the notch 105 is formed with the wheel 104B in which the notch 105 is not formed.

[0058] (Other embodiments) The above describes in detail an embodiment of the present invention with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes and the like are also included within the scope that does not deviate from the gist of the present invention. In the above embodiment, the visual acuity test display device 20 is configured to include a monitor device as the display device main body 21, but the present invention is not limited to this. For example, as shown in FIG. 18 , the visual acuity test display device 40 may include a sheet-like display device main body 41, visual acuity test marks 100, and comparison marks 200. In this case, the display device main body 41 is formed from a printable material such as paper or resin. The visual acuity test marks 100 and comparison marks 200 are displayed by being printed on the surface of the display device main body 41. Such a visual acuity test display device 40 can be used as a so-called visual acuity chart.

[0059] Also, for example, as shown in Figure 19, a visual acuity test display device 40 may include a sheet-like display device main body 41 and multiple sets of visual acuity test marks 100 and comparison marks 200 of different sizes and types.

[0060] In addition, in the above embodiment, the positions at which the notch portions 105 are formed (the directions in which the notch portions 105 open) may be made different in the mark portions 101A to 101L of the vision test mark 100, and the subject may perform the vision test by indicating the direction of the notch portion 105 when the subject can see that direction, similar to a vision test using a Landolt ring.

[0061] Alternatively, a program for implementing all or part of the functions of the control device 60 may be recorded on a computer-readable recording medium, and the program may be loaded into a computer system and executed to perform processing by each functional unit. The term "computer system" as used herein includes hardware such as an OS and peripheral devices. Furthermore, if a WWW system is used, the term "computer system" also includes the homepage provision environment (or display environment). Furthermore, the term "computer-readable recording medium" refers to portable media such as CDs, DVDs, and USBs, as well as storage devices such as hard disks built into the computer system. Furthermore, if the program is distributed to the control device 60 via a communication line, the control device 60 may load the program into the storage 64 and execute the above-described processing. Furthermore, the program may be for implementing part of the above-described functions, or may be capable of implementing the above-described functions in combination with a program already stored in the computer system. [Explanation of symbols]

[0062] 10... Vision testing system 20...Visual acuity test display device (visual acuity test display device) 21...Display device body (display body) 30...Eye Test Kit 40...Visual acuity test display device 41...Display device body 50…Indication device 60...Control device 70...Storage section 71...input reception section 73...Display control unit 100...eyesight test mark 101A~101L...Marked section 105...Notch 200...Comparison mark

Claims

1. A display device main body; a visual acuity test mark displayed on the display device body, The vision test mark is a mark portion that can be recognized by test subjects, including children; a notch formed in a part of the mark portion and indicating a minimum separation threshold; Visual acuity test display device.

2. The visual acuity test mark and a comparison mark consisting of only the mark portion are displayed side by side on the display device body. The visual acuity test display device according to claim 1.

3. The marking portion indicates the shape of an article that attracts children's attention. The visual acuity test display device according to claim 1.

4. The mark portion indicates the shape of an article other than a Landolt ring. The visual acuity test display device according to claim 1.

5. A part of the mark portion includes a Landolt ring. The visual acuity test display device according to claim 1.

6. The display device main body displays a plurality of the vision test marks of different sizes. The visual acuity test display device according to claim 1.

7. The display device main body displays a plurality of different types of the vision test marks. The visual acuity test display device according to claim 1.

8. The notch is a rectangular recess recessed from the outer edge of the mark to the inside of the mark, or a slit formed so as to cross a part of the mark. The visual acuity test display device according to claim 1.

9. The cutout portion has a dimension S1 in a first direction along the surface of the display device main body and a dimension S2 in a second direction intersecting the first direction along the surface of the display device main body, S1:S2=1.00:1.04 is The visual acuity test display device according to claim 1.

10. The display device main body is a monitor device that displays the visual acuity test mark. The visual acuity test display device according to claim 1.

11. The indicator body is a sheet on which the visual acuity test marks are printed. The visual acuity test display device according to claim 1.

12. The marking portion indicates the shape of an article that attracts children's attention. The visual acuity test display device according to claim 2.

13. The mark portion indicates the shape of an article other than a Landolt ring. The visual acuity test display device according to claim 2.

14. A part of the mark portion includes a Landolt ring. The visual acuity test display device according to claim 2.

15. The display device main body displays a plurality of the vision test marks of different sizes. The visual acuity test display device according to claim 2.

16. The display device main body displays a plurality of different types of the vision test marks. The visual acuity test display device according to claim 2.

17. The notch is a rectangular recess recessed from the outer edge of the mark to the inside of the mark, or a slit formed so as to cross a part of the mark. The visual acuity test display device according to claim 2.

18. The cutout portion has a dimension S1 in a first direction along the surface of the display device main body and a dimension S2 in a second direction intersecting the first direction along the surface of the display device main body, S1:S2=1.00:1.04 is The visual acuity test display device according to claim 2.

19. The display device main body is a monitor device that displays the visual acuity test mark. The visual acuity test display device according to claim 2.

20. The indicator body is a sheet on which the visual acuity test marks are printed. The visual acuity test display device according to claim 2.

21. The visual acuity test display device according to any one of claims 1 to 20, a control device that causes the visual acuity test display device to display the visual acuity test mark, The control device a memory unit in which data of a plurality of the vision test marks is stored; an input receiving unit that receives an input from an external device specifying some of the plurality of vision test marks; A vision testing system comprising: a display control unit that displays a specified portion of the plurality of vision test marks on the vision test display device based on external input.

22. The visual acuity test display device according to any one of claims 2 and 12 to 20, and an indicator indicating the arrangement of the visual acuity test mark and the comparison mark displayed on the indicator body. Eye test kit.

23. A control device for displaying the visual acuity test mark on the visual acuity test display device according to any one of claims 1 to 20, a memory unit in which data of a plurality of the vision test marks is stored; an input receiving unit that receives an input from an external device specifying some of the plurality of vision test marks; A control device comprising: a display control unit that displays a specified portion of the plurality of vision test marks on the vision test display device based on an external input.

24. The control device according to claim 23, receiving an input from an external device specifying some of the plurality of vision test marks; and a step of displaying a specified portion of the plurality of visual acuity test marks on the visual acuity test display device based on an external input.

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