WO2019013563A1

WO2019013563A1 - Method and system for testing dynamic visual acuity

Info

Publication number: WO2019013563A1
Application number: PCT/KR2018/007886
Authority: WO
Inventors: 권순철; 김정호; 손호준; 황이환; 이재현; 이승현; 홍성대
Original assignee: 광운대학교 산학협력단
Priority date: 2017-07-13
Filing date: 2018-07-12
Publication date: 2019-01-17
Also published as: JP2020528304A; KR101922343B1

Abstract

Disclosed, in the present invention, is a method for testing dynamic visual acuity performed in a control device connected with a head-mount display having an gaze tracking sensor and a voice recognition sensor, the method comprising: (a) a step of generating a test chart and providing the same to the head-mount display; (b) a step of providing, to the head-mount display, a marker for displaying, in the test chart, a specific visual target to be read by a user; (c) a step of receiving gaze tracking data on the movement of the user's gaze obtained from the gaze tracking sensor according to the display of the marker, and voice recognition data obtained from the voice recognition sensor as the user reads the visual target displayed by the marker; and (d) a step of generating a dynamic visual acuity test result on the basis of the gaze tracking data and the voice recognition data.

Description

Fuselage Visual Inspection Method and System

[0001] The present invention relates to a technique for inspecting a fuselage visual acuity, in which a fuselage visual acuity test for inspecting a fusiform visual acuity based on a voice of a user who reads and reads a user's gaze and a target gazing at a target of a test chart output to an optically- &Lt; / RTI >

The visibility affects sports vision, driving and so on. Especially, as the age of aging society has fallen due to reasons such as the decline in the ability of the elderly, traffic accidents are becoming a problem. However, visual training and evaluation charts remain in analog equipment. For example, conventional push-up bar, aperture rule, Eccentric circles, Brock string, Flipper, etc. are using optical lenses, rods, and print targets. The hardcopy-based fuselage vision test inspects the fuselage vision while the head is fixed. Therefore, development of the visual training equipment and evaluation charts is insufficient compared to the technological progress. Therefore, it is required to develop a visual inspection method of the fuselage which realizes a practical aspect by reflecting the actual environment of the user.

[Prior Art Literature]

[Patent Literature]

(Patent Document 1) Korean Patent Laid-Open No. 10-2012-0052224

SUMMARY OF THE INVENTION It is an object of the present invention to provide an impulse-type head-mounted display that uses an optically transmissive head-mounted display including a voice recognition sensor and a gaze tracking sensor to measure the time required for a user's gaze to reach a target, And to provide a method and a system for inspecting a fusiform body for measuring movement.

According to a first aspect of the present invention, there is provided a method for inspecting a fuselage visual acuity performed by a control device connected to a head-mounted display having a line-of-sight sensor and a speech recognition sensor, Providing the head-mounted display; (b) providing the head-mounted display with a marker for displaying a specific target to be read by a user in the inspection chart; (c) displaying the gaze tracking data according to the movement of the user's gaze obtained from the gaze tracking sensor and the index indicated by the marker in accordance with the display of the marker, ; And (d) generating a visual acuity test result based on the gaze tracking data and the speech recognition data.

Preferably, the method may further include calibrating gaze tracking data obtained from the gaze tracking sensor and an image output to the head mount display before the step (a).

Preferably, the step of calibrating further comprises the steps of creating a calibration marker and providing it to the head-mounted display; Acquiring gaze tracking data of a user staring the calibration marker and obtaining a gaze position coordinate of a user in the display image output from the head mounted display from the gaze tracking data; And matching the position coordinate of the gaze position with the position coordinate of the marker for calibration in the display image output from the head mount display.

Preferably, the step (b) includes setting a valid region for the specific target to display whether the user's gaze reaches a specific target, and displaying the valid region as a marker, A specific target to be read by the target is sequentially determined in the inspection chart, and a marker for displaying the target according to the determined target may be sequentially provided to the head mount display.

Preferably, the step (d) includes: determining whether the user's line of sight is located within the effective area from the gaze tracking data; And recording the time when the user ' s line of sight reaches the effective area.

Advantageously, the step (d) may include recording the time when the voice recognition data is received.

Preferably, the step (d) includes calculating a time difference when the user's gaze reaches the effective area and a time difference when the voice recognition data is received, wherein the marker is sequentially provided If a plurality of time differences are calculated, an average of the plurality of time differences can be calculated.

The step (d) may include detecting an error for each of the vertical inspection and the horizontal inspection based on the speech recognition data and the mark indicated by the marker on the inspection chart, and calculating the total number of errors .

According to a second aspect of the present invention, there is provided a system for inspecting a fuselage, comprising: a head-mounted display including a line-of-sight sensor and a speech recognition sensor; And a control device connected to the head mount display, wherein the control device comprises: a test chart transmitting unit for generating a test chart and providing the test chart to the head mount display; A marker providing unit for providing the head mount display with a marker for displaying a specific target to be read by the user in the inspection chart; The visual track data corresponding to the movement of the user's gaze obtained from the visual tracker and the voice recognition data obtained from the voice recognition sensor as the user reads the index indicated by the marker, A data receiving unit; And a fuselage visual acuity measuring unit for generating a fusiform visual acuity test result based on the gaze tracking data and the speech recognition data.

The control device may further include a calibration unit for calibrating gaze tracking data obtained from the gaze tracking sensor and an image output to the head mounted display.

Preferably, the calibrating unit generates and provides a calibration marker to the head-mounted display, acquires gaze tracking data of a user staring at the marker for calibration, and displays, from the gaze tracking data, And the position coordinate of the eye mark position in the display image output from the head mount display can be matched with the position coordinate of the eye mark position in the display image output from the head mount display.

Preferably, the marker providing unit sets a valid region for the specific target to determine whether the user's gaze reaches a specific target, displays the valid region as a marker, and the specific target to be read by the user is The marker is sequentially determined in the inspection chart, and a marker for displaying the target according to the determined specific target may be sequentially provided to the head mount display.

Preferably, the fuselage visual acuity measuring unit may determine from the gaze tracking data whether the user's line of sight is located within the effective area, and record the time when the user's line of sight reaches the effective area.

Preferably, the fusiform visual acuity measuring unit may record a time when the speech recognition data is received.

Preferably, the fuselage visual acuity measuring unit calculates a time difference when the user's gaze reaches the effective area and a time difference when the user's voice recognition data is received, The average of the plurality of time differences can be calculated.

Preferably, the moving body visual acuity measuring unit may detect an error for each of the vertical inspection and the horizontal inspection on the basis of the voice recognition data and the mark indicated by the marker on the inspection chart, thereby calculating the total number of errors.

As described above, according to the present invention, since the conventional dynamic visual acuity test chart is outputted through the optically transmissive head-mounted display, there is an effect that the visual acuity test of the fuselage close to life can be performed, We can analyze the result of the visual acuity of the fuselage using the time difference between the time of reading the target and the time of reading the target, so that it is possible to judge the case where the behavior is fast despite the good fuscial visual acuity, There is an effect.

Further, according to the present invention, a virtual test chart is mixed and provided in a real world using an optically transmissive head-mounted display, so that visual activities performed by a user in daily life can be given to a living body vision test environment, It is possible to implement an in-vivo visual acuity test system, and thus the practical and practical aspects of the visual acuity test system are enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a vision system for a fuselage vision system according to a preferred embodiment of the present invention; FIG.

2 is a view for explaining a head-mounted display according to an embodiment.

3 is a block diagram of a controller according to one embodiment.

4 is a flowchart illustrating a method of inspecting a fusiform body vision according to an exemplary embodiment.

5 is a diagram illustrating an environment in which a fusiform vision visual inspection method according to an embodiment is performed.

6 is a schematic diagram showing the Landolt C target.

7 is an exemplary diagram for explaining the calibration.

8 is an exemplary diagram for explaining providing a marker.

Fig. 9 is an exemplary diagram for explaining how to measure the time when the line of sight reaches the effective area. Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will be more apparent from the following detailed description taken in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. &Quot; and / or " include each and every combination of one or more of the mentioned items.

Although the first, second, etc. are used to describe various elements, components and / or sections, it is needless to say that these elements, components and / or sections are not limited by these terms. These terms are only used to distinguish one element, element or section from another element, element or section. Therefore, it goes without saying that the first element, the first element or the first section mentioned below may be the second element, the second element or the second section within the technical spirit of the present invention.

Also, in each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, and the identification code does not describe the order of each step, Unless the order is described, it may happen differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terms used below are defined in consideration of the functions of the embodiments of the present invention, which may vary depending on the intention of the user, the operator, or the custom. Therefore, the definition should be based on the contents throughout this specification.

Dynamic Visual Acuity refers to the ability of an object or an observer to see an object in motion. Types of visual acuity include the following: Saccadic Eye Movement, Pursuit Eye Movement, Vestibular-ocular Reflex, Visual Fixation, and the like. In the inspection system, impulsive eye movements are measured.

Impulsive eye movement refers to the movement of the pupil to position the image of a moving object in the center of the retina. The movement of the eyeball when you want to move your gaze from an object you are already watching to another is your impulsive eyeball movement. In the same sense, impulsive eye movements refer to eye movements that place an image of an object other than the center of the eye in the center of the eye. Reading belongs to a typical impulsive eye movement. Clinically normal impulsive eye movements are faster than those of the follow - up eye movements and the upward movements, which are about 300 seconds per second and 30 seconds per second. Impulsive eye movements have higher speed and longer duration of eye movement. For example, turning a pupil by 40 degrees than turning a pupil by 5 degrees is faster and longer. Also, the starting point of the exercise is fast and the ending is slowing down. When there is a problem with impulsive eye movement, especially when reading, middle and middle words are read and read, skip by one line, and reading position is lost. In addition to this, when you move your head and read a book, or when you play ball, you will not be able to catch or catch the ball because your eyes and hands do not cooperate.

Hereinafter, a method and system for examining a fusiform eye vision for measuring impulsive eye movements, which are movements of an eyeball for positioning a moving object in the center of a retina, will be described.

Referring to FIG. 1, the fusiform vision system 100 includes a head mound display 110 and a control device 120, and the head mounted display 110 and the control device 120 are connected to each other via a network.

A head mounted display (HMD) 110 is a device mounted on a user's head for displaying a virtual reality or augmented reality, and outputs a test chart for examining the visual acuity . Preferably, the head-mounted display 110 may include a line-of-sight sensor 111, e.g., a camera capable of tracking the user's line of sight, and a speech recognition sensor 112, e.g., a microphone. The line-of-sight sensor 111 senses and tracks movement of the line of sight of the user wearing the head-mounted display 110, and the voice recognition sensor 112 can sense and recognize the voice of the user reading the target. Here, the line-of-sight sensor 111 may be provided with two lines for tracking the line of sight of the user's right eye and the left eye. Although not shown in the drawing, the head mount display 110 may include a GPS, a geomagnetic sensor, a gyroscope sensor, and the like.

Preferably, the head-mounted display 110 is capable of outputting a test chart to an augmented reality corresponding to an optical see-through head-mounted display. 2, the head mount display 110 corresponding to the optically transmissive head mount display displays a test chart provided from the controller 120 through an image output unit (for example, a mini projector) And the inspection chart outputted through the image output unit can be mixed with the image of the actual environment passing through the prism and can be displayed to the user. That is, the user can view an augmented reality image mixed with a test chart in an actual environment.

1 and 2 illustrate that the speech recognition sensor 112 is included in the head mount display 110, the speech recognition sensor 112 may be coupled to the head mount display 110 or the control device 120 May be implemented as separate components or devices.

The controller 120 is connected to the head mount display 110 to perform a visual inspection of the body. Preferably, the control device 120 generates and provides a test chart for performing a fusiform visual acuity test to the head-mounted display 110, and the line-of-sight sensor 111 and the speech recognition sensor 112 The visual acuity of the fuselage may be measured based on the line-of-sight tracking data and the speech recognition data obtained from the fuselage visual acuity data and the fusional sight test result.

3 is a block diagram of a controller according to one embodiment.

Referring to FIG. 3, the control device 120 includes a test chart transmitting unit 121, a marker providing unit 122, a data receiving unit 123, a moving body visual acuity measuring unit 124, and a control unit 125. Here, the control unit 125 controls the operation of the test chart transmitting unit 121, the marker providing unit 122, the data receiving unit 123, and the moving body visual acuity measuring unit 124 and the flow of data. Hereinafter, a method of inspecting a visual body of a moving body performed by the control device 120 will be described in detail with reference to FIGS.

5, the user wears the head-mounted display 110 and displays the image of the real environment through the head-mounted display 110 It is possible to examine the visual acuity of the fuselage while viewing the test chart outputted to the augmented reality. Here, the test chart may be provided, for example, as a King-Devic chart or a DEM (Developmental eye movement) chart, and the test chart target may be a 1.5 mm inner diameter Can be applied based on the built-in convex lens or prism magnification when viewing the test chart through the head mount display 110 based on the Landolt C test chart which defines the visual acuity and the time to discriminate between the visual acuity and the visual acuity. Also, OTF (Open Type Font) can be applied to the fonts of the test chart displayed by the head mount display 110, and OTF shows the same letter shapes on the printed matter regardless of the type of operating system. In addition, the OTF method produces a curved line with a three-dimensional Bézier method, and a detailed curve can be expressed although the calculation process is complicated and the expression speed is slow.

In one embodiment, before the fuselage visual acuity test method using the inspection chart shown in Fig. 4 is performed, calibration is performed to match the area in which the user looks at the line of sight and the area displayed at the display end of the head mount display 110 . In order to perform such calibration, the controller 120 controls the calibration unit (not shown) for calibrating the gaze tracking data obtained from the gaze tracking sensor 111 and the image output to the head mounted display 110 .

More specifically, the calibration section generates a marker for calibration and provides it to the head mount display 110. For example, referring to FIG. 7A, the calibration unit can generate a 5X5 calibration marker, and the generated calibration marker is sequentially displayed on the head-mounted display (FIG. 7B) 110). As the marker for calibration is sequentially provided to the head mount display 110, the calibration unit acquires the gaze tracking data of the user gazing at the marker for calibration, and detects the gaze tracking data from the gaze tracking data in the display image output from the head- And aligns the position coordinates of the visual axis position with the position coordinates of the markers for calibration in the display image output from the head mount display 110. [ For example, as shown in (b) of FIG. 7, when a marker for calibration # 1 is provided, the user gazes at the marker for calibration # 1, and the calibration unit obtains, from the obtained gaze tracking data, It is possible to acquire the user's gaze position coordinate indicating where the gaze is gazing and to match the gaze position coordinate of the user with the position coordinate of the marker for No. 1 calibration. Then, for the second calibration marker and the remaining calibration markers, the user's gaze position coordinate and the marker's position coordinate can be matched in the same manner, so that the area where the user looks at the gaze and the head mount display 110 can be completed.

Referring again to FIG. 4, the test chart transmitting unit 121 generates a test chart and provides it to the head mount display (step S410). The marker providing unit 122 displays a specific target to be read by the user in the test chart To the head mount display 110 (step S420).

Preferably, the marker providing unit 122 may set a valid region for a specific target and display the valid region as a marker in order to determine whether or not the user's gaze reaches a specific target. For example, referring to FIG. 8, the marker providing unit 122 sets the effective area as indicated by a red box for the targets "5" and "9" in the inspection chart, A marker corresponding to the red box may be provided to the head mount display 110. [ That is, the user can see a test chart marked with a marker for a specific target on the head mount display 110 as shown in FIG.

Preferably, the specific target to be read by the user is determined sequentially in the inspection chart, and markers for displaying the target according to the determined specific target are sequentially provided to the head mount display 110. [ For example, referring to FIG. 8, 5, 9, 2, 5, 7, ... The markers corresponding to the red boxes may be sequentially provided in the same order as in FIG.

The data receiving unit 123 receives the gaze tracking data and the marker indicated by the marker obtained by the gaze tracking sensor 111 from the gaze tracking sensor 111 and acquires the gaze tracking data from the voice recognition sensor 112 (Step S430). The fuselage visual acuity measuring unit 124 generates a fuselage visual acuity test result based on the gaze tracking data and the speech recognition data (step S440).

Preferably, the fuselage visual acuity measuring unit 124 determines whether the user's line of sight is located within the effective area from the line-of-sight trace data, records the time when the user's line of sight reaches the effective area, 124 may record the time at which the voice recognition data is received. Here, the time to be recorded can be measured in units of 1/100 second, and can be recorded in the form of HH: MM 'SS' '. Ss.

9, when a marker indicating the effective area for each of the targets is displayed by the marker providing unit 122 as shown in FIG. 9A, the moving body visual acuity measuring unit 124 measures It is possible to determine whether or not the user's line of sight reaches the effective area on the basis of the line-of-sight trace data corresponding to the movement of the user's line of sight received by the data receiving unit 123. For example, As shown, when the user's line of sight indicated by the black dot enters the effective area indicated by the red box, it can be determined that the user's line of sight has reached the effective area. When the user's line of sight reaches the effective area, the fusiform visual acuity measuring unit 124 can measure the time. For example, with respect to the target " 5 " in Fig. 9B, If the time is 35.45 seconds, it can be recorded as 00: 00'35 ".45. When the user looks at the target " 5 " according to the movement of the line of sight and then looks at the " 9 ", the fusiform visual acuity measuring unit 124 measures the time at which the user's gaze reaches the effective area of the target & For example, 00: 00'35 ".99 can be recorded.

If the user recognizes the voice of the user and the voice recognition data is received by the data receiving unit 123, the user can check the visual acuity of the body of the user The unit 124 can record the time when the speech recognition data is received.

Preferably, the fuselage visual acuity measuring unit 124 may calculate the time when the user's line of sight reaches the effective area and the time difference when the speech recognition data is received using the following equation (1). Here, if a plurality of time differences are calculated as the markers are sequentially provided, the fusiform visual acuity measuring unit 124 may calculate an average of a plurality of time differences using the following Equation (2). For example, if there are forty marks on the inspection chart and markers are sequentially displayed for each target, the time when the user's line of sight reaches the effective area and the time when the speech recognition data is received are 40 And thus the calculated time difference becomes a total of 40, so that the fusiform visual acuity measuring unit 124 can calculate the average of the time difference values.

[Formula 1]

[Formula 2]

Here, adr time is the time when the speech recognition data is received, tdr time is the time when the line of sight reaches the effective area, diff time is the time difference, cn is the number of the target, and average difftime is the average value of the time differences.

Preferably, the moving body visual acuity measuring unit 124 may calculate the total number of errors by detecting an error for each of the vertical inspection and the horizontal inspection based on the voice recognition data and the index indicated by the marker on the inspection chart. Here, the moving body visual acuity measuring unit 124 can convert the voice in the voice recognition data into text using the STT (Speech To Text) algorithm. The visual inspection of the fuselage consists of a vertical inspection using a vertical test chart and a horizontal test using a horizontal test chart. When the user reads the characters in a vertical or horizontal direction The fuselage visual acuity test result can be generated on the basis of the time required for reading, that is, the test execution time, the wrong number calculated by comparing the voice data and the inspection chart, the number read repeatedly, and the number omitted.

Preferably, the control device 120 can calculate the total number of errors by detecting an error for each of the vertical inspection and the horizontal inspection based on the voice recognition data received from the voice recognition sensor 112 and the inspection chart. Here, the total number of errors can be calculated by Equation 3 below, where Total Errors is the total number of errors, s is the number read incorrectly, o is the number read out, The number, and t, is the number that is read.

[Formula 3]

Preferably, the control device 120 may calculate the adjustment time based on the inspection execution time and the number of errors detected for each of the vertical inspection and the horizontal inspection. In the equation 4, ADJ Time is the adjustment time, Time is the test execution time, cn is the number of the target, o is the number read out, and a is Additional readings.

[Formula 4]

Preferably, the control device 120 may generate a fuselage visual acuity test result based on the ratio of the adjustment time calculated for each of the vertical inspection and the horizontal inspection. That is, the control device 120 calculates the "ratio = horizontal adjustment time / vertical adjustment time" and determines whether the fuselage visual acuity is normal, insufficient, or has any problem in consideration of the calculated ratio, the adjustment time, You can decide.

In one embodiment, the time when the line of sight of the user calculated through the fuselage visual acuity measuring unit 124 reaches the effective area and the time difference or the average value of the time differences when the speech recognition data is received, The number of errors and the adjustment time analyzed on the basis can be provided as a result of the fuselage visual acuity test.

Therefore, according to the present invention, it is possible not only to determine the visual acuity of the fuselage but also to judge whether the action is fast despite the good fuselage visual acuity, or whether the behavior is slow or the fusiform visual acuity is poor.

Meanwhile, the method of inspecting a fuselage visual acuity according to an embodiment of the present invention can also be implemented as a computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored.

For example, the computer-readable recording medium includes a ROM, a RAM, a CD-ROM, a magnetic tape, a hard disk, a floppy disk, a removable storage device, a nonvolatile memory, , And optical data storage devices.

In addition, the computer readable recording medium may be distributed and executed in a distributed manner in a computer system connected to a computer network, and may be stored and executed in a code that can be read in a distributed manner.

Although the preferred embodiments of the method for inspecting a fuselage visual acuity according to the present invention and the fuselage visual inspection system for performing the same are described above, the present invention is not limited thereto, It is possible to carry out various modifications within the scope of the present invention, and this also belongs to the present invention.

[Description of Symbols]

100: Fuselage vision system

110: Head mount display

111: Eye Tracking Sensor

112: Speech recognition sensor

120: Control device

121: Test chart transmission unit

122: Marker offering

123: Data receiver

124: Fuselage visual acuity measuring unit

125:

Claims

A visual inspection method for a moving body visual acuity test performed in a control device connected to a head mount display having a visual tracker sensor and a voice recognition sensor,

(a) generating a test chart and providing it to the head-mounted display;

(b) providing the head-mounted display with a marker for displaying a specific target to be read by a user in the inspection chart;

(c) displaying the gaze tracking data according to the movement of the user's gaze obtained from the gaze tracking sensor and the index indicated by the marker in accordance with the display of the marker, ; And

(d) generating a visual acuity test result based on the gaze tracking data and the voice recognition data.
The method according to claim 1, wherein before step (a)

Further comprising the step of calibrating gaze tracking data obtained from the gaze tracking sensor and an image output to the head mount display.
3. The method of claim 2, wherein the calibrating step

Creating a marker for calibration and providing it to the head-mounted display;

Acquiring gaze tracking data of a user staring the calibration marker and obtaining a gaze position coordinate of a user in the display image output from the head mounted display from the gaze tracking data; And

And matching the position coordinates of the gaze position with the position coordinates of the marker for calibration in the display image output from the head mount display.
2. The method of claim 1, wherein step (b)

Setting a valid region for the specific target to determine whether the user's gaze reaches a specific target, and displaying the valid region as a marker,

Wherein the specific target to be read by the user is sequentially determined in an inspection chart, and a marker for displaying the target according to the determined target is sequentially provided to the head mount display.
5. The method of claim 4, wherein step (d)

Determining from the gaze tracking data whether the user's line of sight is located within the effective area; And

And recording the time when the user's line of sight reaches the effective area.
6. The method of claim 5, wherein step (d)

And recording the time when the speech recognition data is received.
7. The method of claim 6, wherein step (d)

Calculating a time when the user's line of sight reaches the effective area and a time difference when receiving the voice recognition data,

Wherein when a plurality of time differences are calculated as the marker is sequentially provided, an average of the plurality of time differences is calculated.
2. The method of claim 1, wherein step (d)

Detecting an error for each of the vertical inspection and the horizontal inspection based on the speech recognition data and the mark indicated by the marker on the inspection chart, and calculating the total number of errors.
A head-mounted display having a line-of-sight sensor and a speech recognition sensor; And

And a controller coupled to the head mount display,

The control device includes:

A test chart transmitting unit for generating a test chart and providing the test chart to the head mount display;

A marker providing unit for providing the head mount display with a marker for displaying a specific target to be read by the user in the inspection chart;

The visual track data corresponding to the movement of the user's gaze obtained from the visual tracker and the voice recognition data obtained from the voice recognition sensor as the user reads the index indicated by the marker, A data receiving unit; And

And a fuselage visual acuity measuring unit for generating a fusiform visual acuity test result based on the gaze tracking data and the voice recognition data.
10. The apparatus according to claim 9, wherein the control device

Further comprising a calibration unit for calibrating gaze tracking data obtained from the gaze tracking sensor and an image output to the head mount display.
The apparatus of claim 10, wherein the calibration unit

A marker for calibration is generated and provided to the head-mounted display,

Acquiring gaze tracking data of a user gazing at the marker for calibration, obtaining a gaze position coordinate of a user in a display image output from the head mounted display from the gaze tracking data,

Wherein the visual axis position coordinate coincides with the position coordinate of the marker for calibration in the display image output from the head mount display.
10. The apparatus of claim 9, wherein the marker providing unit

Setting a valid area for the specific target to determine whether the user's gaze reaches a specific target, and marking the valid area as a marker,

Wherein the specific target to be read by the user is sequentially determined in an inspection chart, and a marker for displaying the target according to the determined target is sequentially provided to the head mount display.
13. The apparatus according to claim 12, wherein the moving body visual acuity measuring unit

From the gaze tracking data, whether or not the user ' s line of sight is located within the effective area,

And records the time when the user's line of sight reaches the effective area.
14. The apparatus according to claim 13, wherein the moving body visual acuity measuring unit

And the time when the voice recognition data is received is recorded.
15. The apparatus according to claim 14, wherein the moving body visual acuity measuring unit

Calculating a time when the user's line of sight reaches the effective area and a time difference when receiving the voice recognition data,

Wherein when a plurality of time differences are calculated as the marker is sequentially provided, an average of the plurality of time differences is calculated.
The apparatus according to claim 9, wherein the moving body visual acuity measuring unit

And an error is detected for each of the vertical inspection and the horizontal inspection based on the speech recognition data and the mark indicated by the marker on the inspection chart to calculate the total number of errors.
9. A computer-readable recording medium having recorded thereon a computer program for executing the method according to any one of claims 1 to 8.