JP2018175021A - Visual acuity test equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide visual acuity test equipment provided with a display device for recording a visual acuity value determination process and making the visual acuity value determination process accurate by displaying a time-series change in the correctness of a subject's response.SOLUTION: Visual acuity test equipment includes: target presentation means for presenting a target; input means for inputting a response of a subject to the target presented by the target presentation means; selection means for selecting a new target with a different visual acuity value based on the correctness of the response; repetition means for causing the target presentation means, the input means, and the selection means to be operated repeatedly using the new target; and display means for displaying a correctness result list for each of a plurality of times of responses. The display means displays the correctness result according to the order of presentation for each visual acuity value of the targets presented by the target presentation means.SELECTED DRAWING: Figure 9

Description

  This specification discloses a vision testing device. In particular, the present invention discloses a visual acuity inspection apparatus provided with a display device which displays correct / incorrect time-series change of the response of the subject to record and correct the process of determining the visual acuity value.

  The visual acuity inspection apparatus is provided with an objective presenting means for presenting an objective (for example, Landolt's ring) and an input means for inputting a response of the subject to the presented objective (for example, a response that the break is right or left). It is done. Depending on whether the response is correct or incorrect, a vision test apparatus is also known which selects a new target to be presented next, presents a new index by the target presenting means, and repeatedly operates the input means and the selecting means. There is. In this type of visual acuity test apparatus, if the response is correct, an index corresponding to a high visual acuity value is selected and presented, and if the response is incorrect, a target for a low visual acuity value is selected and presented.

  In addition, in order to support the process of determining the visual acuity value, a display device has been developed which displays a list of the results of the error. For example, in Patent Document 1, correctness results are displayed in a list on a graph in which visual acuity values are used as one axis and visual target groups belonging to the same visual acuity value are arranged along the other axis.

  Further, Patent Document 2 discloses a display device for displaying a measurement progress of practical visual acuity. In Patent Document 2, the measured visual acuity value of normal visual acuity is displayed, and with regard to the measurement progress of practical visual acuity measured based on the visual acuity value of ordinary visual acuity, the elapsed time is taken as one axis, and the visual acuity of the displayed target Display values along the other axis.

JP-A-6-46992 Japanese Patent Application Publication No. 2003-088501

  The display device of Patent Document 1 lists correctness / incorrectness for each visual acuity value of the visual targets presented to the subject. For this reason, the examiner can grasp the correctness / incorrectness of each presented visual acuity value of the visual target, but can not grasp the presenting order of a plurality of visual targets. For example, in the case where a target belonging to the same visual acuity value is presented a plurality of times and the response result includes correct and incorrect answers, it may be correct before the end of the test whether it was correct immediately after the start of the test It is not possible to grasp the progress of measurement of For this reason, it is not possible to sufficiently acquire information necessary for accurately grasping the visual acuity value of the subject's eye and other conditions of the subject's eye. Further, the display device of Patent Document 2 displays the time change of the determined visual acuity value, and can not acquire information necessary for determining the visual acuity value of the eye to be examined.

  The present specification discloses a visual acuity inspection apparatus which displays correct / incorrect time-series change of a subject's response to record and correct the process of determining the visual acuity value.

  The visual acuity inspection device disclosed in the present specification is based on target presenting means for presenting a target, input means for inputting a subject's response to the target presented by the target presenting means, and correctness of the response. Selecting means for selecting new targets having different visual acuity values, repeating means for repeatedly operating the target presenting means, the input means, and the selecting means using the new targets, and the correctness result of each of the plurality of responses A display means for displaying a list is provided. The display means displays the correctness result according to the presentation order for each visual acuity value of the visual targets presented by the visual target presenting means.

  The visual acuity inspection apparatus described above displays the correctness result of each of the responses to the visual targets presented to the subject, in the order of presentation for each visual acuity value of the visual targets. Therefore, it is easy to visually grasp the number of times the target is presented for each visual acuity value, and the proportion of correctness or wrongness for each visual acuity value. Furthermore, the correctness result of the response for each visual acuity value is displayed according to the presenting order of the visual targets. For this reason, it is possible to visually and easily grasp the order of correctness / incorrectness of the response for each visual acuity value, and it is possible to easily and accurately evaluate the visual acuity value and the state of the subject eye.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the structure of the visual acuity inspection apparatus which concerns on an Example. The flowchart which shows an example of the process in which the vision test | inspection apparatus which concerns on an Example measures the eyesight value of a to-be-tested eye. It is a figure which shows an example of the display screen displayed on a touch panel, Comprising: The state which inputted the visual acuity value of the first visual target into the starting visual acuity value input column is shown. It is a figure which shows an example of the display screen displayed on a touch panel, Comprising: The state which displayed that it is a response waiting state with respect to the first visual mark is shown. It is a figure which shows an example of the display screen displayed on a touch panel, Comprising: The state which displayed the response result (correct answer) with respect to the first visual target is shown. It is a figure which shows an example of the display screen displayed on a touch panel, Comprising: It shows the state which displayed that it is a response waiting state with respect to the optotype presented second time with the response result with respect to the 1st optotype. It is a figure which shows an example of the display screen displayed on a touch panel, Comprising: The state displayed that it is a response waiting state with respect to the visual target currently presented with the visual target shown 3rd time with the response result with respect to the visual target previously shown is shown. It is a figure which shows an example of the display screen displayed on a touch panel, Comprising: It shows the state which displayed that it is a response waiting state with respect to the visual target currently presented with the visual target presented previously. It is a figure which shows an example of the display screen displayed on a touch panel, Comprising: The state in which the test | inspection was complete | finished is shown. It is a figure which shows another example of the display screen displayed on a touch panel, Comprising: It shows the state which displayed the correct answer rate for every target and visual acuity value which were shown with the correctness of a response.

  The main features of the embodiment described below are listed. The technical elements described below are technical elements that are independent of each other and exhibit technical usefulness by themselves or various combinations, and are not limited to the combinations described in the claims at the time of filing. Absent.

(Feature 1) In the visual acuity inspection apparatus disclosed in the present specification, the display means may list the plurality of correctness results on a graph in which the visual acuity value is one axis and the presentation order is the other axis. Good. According to such a configuration, it is possible to easily grasp the correctness result for each visual acuity value more visually.

(Feature 2) In the visual acuity inspection apparatus disclosed in this specification, a connection line connecting the correctness result at the previous presentation and the correctness result at the present presentation may be superimposed and displayed on the graph. According to such a configuration, it is possible to easily grasp not only the order of presenting the visual targets for each visual acuity value but also the order of presenting visual targets for the entire plurality of correctness / incorrectness results. Therefore, the progress of the visual acuity test can be grasped more easily. Note that the presentation order corresponding to each correctness result may be superimposed and displayed with a number instead of the connection line connecting the correctness result at the previous presentation and the correctness result at the present presentation. In addition, by selecting one of the displayed true / false results, it may be displayed so that the true / false results answered before and after the true / false result can be grasped.

(Feature 3) In the visual acuity inspection apparatus disclosed in the present specification, targets corresponding to the respective correctness results may be superimposed and displayed on the graph. According to such a configuration, it is possible to visually grasp the relationship between each true / false result and the type of target. Therefore, for example, it is possible to grasp the direction in which the eye to be examined is difficult to see, and it is possible to evaluate other states other than the visual acuity value for the eye to be examined. In addition, each correctness result may be displayed on a graph by square frame for every test | inspection frequency, and a visual target may be displayed overlappingly in the square frame.

  Hereinafter, the vision test apparatus 10 according to the present embodiment will be described. As shown in FIG. 1, the visual acuity examination apparatus 10 includes a visual target presenting unit 12, a touch panel 14, and a control unit 16.

  The target presenting unit 12 includes a monitor (not shown), and presents the target to the subject by showing the monitor to the subject. At the time of visual acuity measurement, the visual target presenting unit 12 is disposed at a position where the visual target displayed on the monitor is a predetermined distance from the eye to be examined. A Landolt ring is used as a target presented by the target presenting unit 12, and the direction of the break of the presented Landolt ring is four directions. The configuration of the visual target presenting unit 12 is not limited to the above-described configuration, and one used in a known visual acuity test apparatus can be used. For example, the target presenting unit may be configured to display the target in the housing. In this case, the visual target presenting unit presents the visual target to the subject (that is, the eye to be examined) through the inspection window provided in the housing. In addition, in the present embodiment, Landolt's ring is used as a visual target, but the type of visual target presented by the visual target presenting unit 12 is not particularly limited. For example, an E-chart, a Sneren's visual target, or the like may be used, and those used in known visual acuity inspection apparatuses can be used. The target presenting unit 12 is an example of the “target presenting means”.

  The touch panel 14 is a display device that provides the examiner with various results regarding the visual acuity test and the response results of the subject to each presented target, and is an input device that receives instructions and information from the examiner. . FIG. 3 shows an example of a display screen displayed on the touch panel 14. As shown in FIG. 3, on the touch panel 14, the presented visual target display field 32, the start button 34, the end button 36, the start visual acuity value input field 38, the determined visual acuity value display field 40, and the response result input button 42 and a graph column 44 are displayed.

  In the presented visual target display column 32, the type of visual target being presented to the visual target presenting unit 12 (that is, the Landolt ring having a break in any of the predetermined directions (for example, four directions)) and the visual acuity value Is displayed. When the target presented to the target presenting unit 12 is changed, the type of the changed target and its visual acuity value are displayed in the presented target display field 32.

  When the start button 34 is pressed, the examination is started, and as described later, the eyesight examination apparatus 10 ends the examination when the set examination completion condition is satisfied. By pressing the end button 36, the examination can be ended before the examination end condition is satisfied.

  The start visual acuity value input field 38 is disposed at a position adjacent to the start button 34 (on the right side of the start button 34 in FIG. 3). By inputting the visual acuity value at the start of the examination in the start visual acuity value input field 38, the visual acuity value of the target to be presented first is indicated. The visual acuity value input to the start visual acuity value input field 38 is stored in the storage unit 18 of the control unit 16 described later. The determined visual acuity value display field 40 is disposed at a position adjacent to the end button 36 (on the right side of the end button 36 in FIG. 3). The determined visual acuity value display field 40 displays the visual acuity value of the subject eye determined by the examination.

  In the response result input button 42, a correct answer button (a button indicated by "o" arranged on the left side in FIG. 3) and a wrong answer button (a button indicated by "x" arranged on the right side in FIG. 3) ) Are arranged. If the subject's response is the correct answer, the examiner presses the correct answer button, and if the subject's response is the wrong answer, the examiner presses the wrong answer button. The response result input by the response result input button 42 is stored in the storage unit 18 together with the type of the presented target (i.e., the direction of the break of the Landolt ring) and the visual acuity value thereof.

  In the graph field 44, the response results of the subject are displayed by a bar graph. The horizontal axis of the graph is the visual acuity value, and the vertical axis is the number of times the target was presented. In the graph column 44, a square (hereinafter, also referred to as a "box") of a predetermined size is displayed for each presentation of a target, and the response results for each visual acuity value are stacked and displayed in the order of presentation. For example, the box is displayed in white in the visual acuity value of the presented optotype during the period from the presentation of the optotype to the input of the response result of the subject (hereinafter also referred to as “response standby state”) Be done. Then, the box is changed from white to green when the response of the subject is input as a correct answer, and the box is changed from white to red when an incorrect answer is input. Ru. As described above, the graph column 44 displays the response standby state, the correct answer, and the incorrect answer in distinction. The graph column 44 only needs to distinguish and display the response standby state, the correct answer, and the incorrect answer, and the display mode is not limited. In the present specification, as shown in FIGS. 4 to 10, the box is illustrated in white when indicating a response standby state, and the box is indicated by a light and thin light dot (hereinafter also referred to as a thin dot) when indicating a correct answer. The box is indicated by a dark and dark dot (hereinafter also referred to as a dark dot) in the case of showing an incorrect answer.

  In addition, although the vision test | inspection apparatus 10 of a present Example is provided with the touch panel 14, it is not limited to such a structure. It may be configured to be capable of displaying and inputting response results etc. For example, a monitor and an input device (for example, a mouse, a keyboard, etc.) may be provided. Further, in the present embodiment, only correctness or falseness is input for the response of the subject, but the present invention is not limited to such a configuration. The configuration may be any configuration that can detect whether the subject's response is correct, and, for example, the subject's response may be input. In this case, it is possible to detect the correctness of the response by determining whether or not the input response and the correct response match. As an example of inputting a subject's answer, for example, a method of inputting a break direction of a Landolt ring using a joystick can be mentioned. In addition, when the examinee's answer is input, the examinee may input the answer without the intervention of the examiner. The touch panel 14 is an example of the “input unit” and the “display unit”.

  The control unit 16 can be configured by, for example, a computer provided with a CPU, a ROM, a RAM, and the like. The control unit 16 is provided with a storage unit 18 and a visual target selection unit 20. In the storage unit 18, for example, the visual acuity value input in the start visual acuity value input field 38, the presented visual target and the corresponding result of the subject's subject, the visual acuity value of the subject eye determined by the examination, etc. Is stored. Further, the presented visual targets and the response results of the subject corresponding thereto are stored in the storage unit 18 in chronological order according to the presented order. The storage unit 18 also stores inspection end conditions. The examination termination condition can be set based on the wrong answer rate for the target with the same visual acuity value, the number of consecutive incorrect answers in the target with the same visual acuity value, and the like. The inspection end condition can be changed by inputting from the touch panel 14.

  In addition, the control unit 16 functions as the visual target selection unit 20 when the computer executes a program. The visual target selection unit 20 stores the visual acuity value input to the start visual acuity value input field 38 and information such as the presented visual target and the corresponding result of the subject. , The target to be presented to the target presenting unit 12 is selected. Specifically, the target selecting unit 20 selects a target to be presented first from the visual acuity values inputted in the starting visual acuity value input field 38. The target selected at this time is the input visual acuity value for the visual acuity value, and is randomly selected for the break direction of the Landolt ring. Further, the target selecting unit 20 selects targets to be presented for the second and subsequent times based on the accuracy of the subject's response to the target presented immediately before that. For example, if the subject's response to the presented target is a correct answer, a target with an eyesight value higher than that of the target is selected, and the subject's response to the presented target is incorrect If it is an answer, select a target whose visual acuity value is lower than that of the target. In any case, the cut direction of the Landolt ring is randomly selected. The target selection unit 20 is an example of the “selection unit”.

  With reference to FIGS. 2-8, the process in which the vision test | inspection apparatus 10 measures the visual acuity value of a to-be-tested eye is demonstrated. FIG. 2 is a flowchart showing an example of processing in which the vision test apparatus 10 measures the visual acuity value of the subject's eye. As shown in FIG. 2, first, the control unit 16 causes the target presenting unit 12 to present the first target (S12). The presentation of the first visual target is performed in the following procedure. First, the examiner inputs the visual acuity value of the target to be presented first into the start visual acuity value input field 38. For example, as shown in FIG. 3, the examiner inputs “0.03” in the start visual acuity value input field 38. The visual acuity value input to the start visual acuity value input field 38 is stored in the storage unit 18. Next, the examiner presses the start button 34. Then, the control unit 16 presents the visual target of the visual acuity value input in the start visual acuity value input field 38 to the visual target presenting unit 12. That is, the target presenting unit 12 presents a target whose visual acuity value is 0.03.

  When the target is presented to the target presenting unit 12, the control unit 16 displays a display indicating that the first target is in a response standby state in the graph column 44 (S14). As shown in FIG. 4, the control unit 16 displays a white box indicating a response standby state in “0.03” of the graph column 44. In addition, the control unit 16 displays the type of the visual target presented by the visual target presenting unit 12 and the visual acuity value thereof in the presented visual target display field 32. In FIG. 4, the Landolt's ring on which the break direction is left and the visual acuity value “0.03” are displayed in the presentation target display column 32.

  Next, the control unit 16 causes the storage unit 18 to store the subject's response to the target presented first (S16). The subject's response is stored in the following procedure. When the target is presented to the target presenting unit 12, the subject responds to the presented target. Then, the examiner presses the correct answer button of the response result input button 42 when the subject's response is a correct answer, and presses the incorrect answer button when it is an incorrect answer. The control unit 16 stores the response result input by the examiner in the storage unit 18.

  Next, the control unit 16 displays the response result in the graph column 44 (S18). The control unit 16 changes the display indicating the response standby state of the graph column 44 into a display indicating the correct answer or the incorrect answer based on the correctness of the response to the first visual target stored in the storage unit 18. For example, if the subject's response to the first visual target is a correct answer, as shown in FIG. 5, the white box displayed as "0.03" is changed to a box indicated by a thin dot.

  Next, the target selection unit 20 of the control unit 16 selects a target to be presented next (hereinafter also referred to as a new index) based on the correctness of the response to the first target stored in the storage unit 18. (S20). If the subject's response to the first visual target stored in the storage unit 18 in step S16 is a correct answer, the visual target selecting unit 20 selects a visual target having a higher visual acuity value than the first visual target. On the other hand, when the subject's response to the first visual target stored in the storage unit 18 in step S16 is an incorrect answer, the visual target selection unit 20 selects a visual target having a visual acuity value lower than that of the first visual target. Do. In FIG. 5, since the subject's response to the target presented first is a correct answer, the target selecting unit 20 selects the target of 0.04 which is the visual acuity value higher than 0.03. Then, the control unit 16 causes the target presenting unit 12 to present the new target selected in step S20 (S22).

  When a new target is presented to the target presenting unit 12, the control unit 16 displays the previous response result (that is, the response result for the first target) together with a display indicating that the new target is in a response standby state. And a connection line connecting the display indicating the response standby state of the new index to the graph column 44 (S24). As shown in FIG. 6, the control unit 16 displays a white box indicating a response standby state in “0.04” of the graph column 44. In addition, the control unit 16 connects a box indicated by light dots displayed at “0.03” (display indicating a response result to the first visual target) and a white box displayed at “0.04”. The connection line 45 is displayed in the graph field 44. Furthermore, the control unit 16 displays the type of the visual target presented by the visual target presenting unit 12 and the visual acuity value thereof in the presented visual target display field 32. In FIG. 6, the Landolt's ring on the right of which the break direction is right and the visual acuity value “0.04” are displayed in the presentation target display column 32.

  Next, the control unit 16 stores the response of the subject to the new index in the storage unit 18 (S26). In addition, since the process of step S26 is the same as the process of step S16, detailed description is abbreviate | omitted. Then, the control unit 16 displays the response result of the subject to the new index in the graph column 44 (S28). The control unit 16 changes the display indicating the response standby state of the graph column 44 into a display indicating a correct answer or an incorrect answer based on the correctness or incorrectness of the response to the new visual target stored in the storage unit 18. For example, if the subject's response to the new visual target is a correct answer, the white box displayed in “0.04” is changed to a box indicated by a thin dot (see FIG. 7).

  Next, the control unit 16 determines whether the result of the subject's response to the target presented a plurality of times from the start of the examination corresponds to the examination end condition (S30). The inspection end condition is stored in advance in the storage unit 18. When the response result of the subject does not correspond to the inspection end condition (in the case of NO at step S30), the process returns to step S20, and the processing of step S20 to step S30 is repeated. On the other hand, when the response result of the subject corresponds to the examination end condition (YES in step S30), the control unit 16 displays the visual acuity value of the subject eye in the determined visual acuity value display field 40, and the visual acuity value Finish the measurement of.

  With reference to FIGS. 6-8, the process which repeats step S20-step S30 is demonstrated concretely. Here, the test termination condition is "when four or more responses are made to the same visual acuity value, and the false answer rate is 60% or more".

  If the response to the target presented the second time (i.e., the target presented next based on the response to the first target) is a correct answer, in step S30, the control unit 16 performs the above-described examination. It is determined whether the end condition is met. Here, since the same visual acuity value has not responded four or more times (see FIG. 6), the control unit 16 determines that the above-described examination end condition is not met. Then, the process returns to step S20, and the target selecting unit 20 selects a new index (target to be presented for the third time). At this time, since the subject's response to the target presented for the second time was a correct answer, the target selecting unit 20 selects a target of 0.05 having a visual acuity value higher than 0.04, and the control unit 16 causes the target presenting unit 12 to present a new index. Then, as shown in FIG. 7, the control unit 16 displays a white box indicating the response standby state in “0.05” of the graph column 44 and indicates by a thin dot displayed in “0.04”. Display a connecting line 46 connecting the box and the white box displayed in "0.05".

  If the subject responds to the target presented for the third time and the response is an incorrect answer, the control unit 16 changes the white box in FIG. 7 into a box indicated by a dark dot (see FIG. 8). ). Then, the process proceeds to step S30 again, and the control unit 16 determines whether the above-described inspection end condition is satisfied. Here, since the same visual acuity value has not responded four or more times (see FIG. 7), the control unit 16 determines that the above-described examination end condition is not met. Then, the process returns to step S20 again, and the target selecting unit 20 selects a new index (target to be presented for the fourth time). Since the subject's response to the target presented for the third time was an incorrect answer, the target selecting unit 20 selects a target with a visual acuity value of 0.04 lower than 0.05, and the control unit 16 The target presenting unit 12 presents the new index. Then, as shown in FIG. 8, the control unit 16 displays a white box indicating a response standby state in “0.04” of the graph column 44 with a box indicating a light dot indicating the above response result (second time Displayed on top of the response results for In addition, a connection line 47 is displayed which connects a box indicated by dark dots displayed in “0.05” and a white box displayed stacked in “0.04”. In this manner, the processing of step S20 to step S30 is repeated until the inspection end condition is satisfied. The control unit 16 is an example of the “repeating unit”.

  FIG. 9 is an example of a display screen in a state where the examination is completed. In FIG. 9, the response results for five times are displayed in “0.05” of the graph column 44, and the false answer rate is 60%. Therefore, the control unit 16 displays "0.04" in the determined visual acuity value display column 40 because "the same visual acuity value responds 4 times or more and the wrong answer rate is 60% or more", and the examination is performed. Have finished. As shown in FIG. 9, in the graph column 44, correctness / incorrectness of responses for a plurality of times (specifically, 13 times) are listed and displayed for each visual acuity value. For this reason, it is possible to easily grasp the number of responses and their correctness for each of the visual acuity values of the presented targets for the plurality of response results. Moreover, while the correctness / incorrectness of the response for several times is displayed on the graph column 44, each response result and the response result just before that are connected by the connection line. For this reason, it is possible to easily grasp visually the correctness of each response and the order of presentation thereof. Therefore, for example, even when a target with the same visual acuity value is presented, the progress of the test visually such as whether the false answer rate is high in the first half of the test or high in the second half of the test It can be made easy to grasp. In addition, if the number of responses for each visual acuity value is high (if the height of the bar graph is high), or if the visual acuity value of the displayed target is wide (if the horizontal spread of the graph is large), the examination is underway. It can be understood that the visual acuity of the subject's eye was unstable. Thus, not only the visual acuity of the subject's eye but also the condition of the subject's eye can be evaluated by listing the order of the presentation together with the correctness of the response for each visual acuity value. For this reason, the visual acuity test result of the subject's eye by the visual acuity test apparatus 10 can be used for a primary diagnosis for evaluating the state and the medical condition of the subject's eye. Also, by being able to grasp the presenting order of the visual targets from the display screen, it is possible to evaluate the visual acuity value and the state of the subject's eye after the examination. For this reason, even if the examinee himself / herself inputs a response answer without the examiner being present, the examiner can accurately evaluate the state of the subject's eye after the examination is completed. The above-described examination end condition of the present embodiment is an example, and the condition can be set in accordance with the medical condition or the condition of the eye to be examined.

  In the present embodiment, although the correctness / incorrectness of the response to the presented target and the connection line indicating the presentation order are displayed on the touch panel 14, the present invention is not limited to such a configuration. For example, as shown in FIG. 10, the touch panel 14 may display the type of the presented optotype along with the correctness / incorrectness of the response to the presented optotype and the connection line indicating the presentation order. That is, in the graph column 44, along with each response result, a target corresponding to the response result may be displayed superimposed on the response result. By displaying in this manner, it is possible to grasp the type of the presented target (that is, the direction of the Landolt ring break) together with the correctness of the response for each visual acuity value. For this reason, for example, it is possible to grasp which type of target (that is, at which break direction Landolt ring) among the targets having the same visual acuity value there are many incorrect answers, etc. For example, other medical conditions or conditions such as astigmatism can be evaluated. Therefore, the accuracy of the primary diagnosis can be improved. Further, in the graph column 44, together with the graph for each visual acuity value, the correct answer rate (or false answer rate) of the visual acuity value may be displayed in an overlapping manner. By displaying in this way, the correct answer rate (or false answer rate) for each visual acuity value can be grasped more easily, particularly when the number of responses for each visual acuity value is high (when the height of the bar graph is high) In addition, the correct answer rate (or the wrong answer rate) for each visual acuity value can be grasped more easily.

  In the visual acuity inspection apparatus 10 according to the present embodiment, the break direction of the Landolt ring presented to the target presenting unit 12 is four directions, but the present invention is not limited to such a configuration. For example, the break direction of the Landolt ring presented to the visual target presenting unit 12 may be eight directions, or may be configured to be switchable between four directions and eight directions. When the four directions and the eight directions can be switched, the four directions and the eight directions can be switched according to the state of the eye to be examined. For example, it may be switched to four directions at the start of the examination, and may be switched to eight directions when it is determined that the eyesight of the subject's eye is stable, or eight directions at the start of the examination. If it is turned on, it may be switched in four directions. Moreover, although the visual acuity inspection apparatus 10 of a present Example inputs the response result with respect to each visual target from the touch panel 14, it is not limited to such a structure. For example, the input device that inputs the response result for each target may be input by speech recognition.

  Further, in the present embodiment, each response result and the response result immediately before that are connected by the connection line, but the present invention is not limited to such a configuration. The presentation order corresponding to each response result may be displayed in a visually comprehensible manner, and for example, the presentation order may be displayed numerically superimposed on each response result. Alternatively, in the graph field 44, connection lines or numbers may not be displayed. Since the response result for each visual acuity value is displayed in the graph column 44 according to the presentation order, the display order of the visual targets can be grasped even if the connection line is not displayed. In addition, the display (overlay display) to be superimposed on each response result such as the connection line or the number indicating the presentation order, the type of the presented target, the display indicating the correct answer rate and the incorrect answer rate, etc. It may be switchable. For example, by providing the switching button on the touch panel 14, the above-described overlapping display may be displayed or not displayed. In addition, by selecting (for example, clicking) one of a plurality of response results displayed in a list, a superimposed display corresponding to the selected response result may be displayed.

  The specific examples of the technology disclosed in the present specification have been described above in detail, but these are merely examples and do not limit the scope of the claims. The art set forth in the claims includes various variations and modifications of the specific examples illustrated above. The technical elements described in the present specification or the drawings exhibit technical usefulness singly or in various combinations, and are not limited to the combinations described in the claims at the time of filing.

10: visual acuity inspection device 12: target presenting unit 14: touch panel 16: control unit 18: storage unit 20: target selecting unit 44: graph column 44
45, 46, 47: Connection line

Claims (4)

Target presenting means for presenting a target;
An input unit for inputting a response of the subject to the target presented by the target presenting unit;
Selection means for selecting new targets having different visual acuity values based on the correctness of the response;
Repeating means for causing the target presenting means, the input means, and the selecting means to repeatedly operate using the new visual target;
It has a display means to list the correctness result of each of multiple responses,
The visual acuity inspection apparatus, wherein the display means displays the correctness result according to the presentation order for each visual acuity value of the visual targets presented by the visual target presenting means.   The visual acuity inspection apparatus according to claim 1, wherein the display means displays the plurality of true / false results in a list on a graph having the visual acuity value as one axis and the presentation order as the other axis.   The visual acuity inspection apparatus according to claim 2, wherein a connection line connecting the correctness result at the previous presentation and the correctness result at the present presentation is superimposed and displayed on the graph.   The visual acuity inspection apparatus according to claim 2 or 3, wherein targets corresponding to the respective correctness / incorrectness results are superimposed and displayed on the graph.

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