WO2020137544A1 - Visual field test device - Google Patents

Visual field test device Download PDF

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Publication number
WO2020137544A1
WO2020137544A1 PCT/JP2019/048457 JP2019048457W WO2020137544A1 WO 2020137544 A1 WO2020137544 A1 WO 2020137544A1 JP 2019048457 W JP2019048457 W JP 2019048457W WO 2020137544 A1 WO2020137544 A1 WO 2020137544A1
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Prior art keywords
inspection target
display
peripheral
function
displayed
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PCT/JP2019/048457
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French (fr)
Japanese (ja)
Inventor
稔 川原
輝夫 相原
Original Assignee
国立大学法人愛媛大学
株式会社ファインデックス
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Application filed by 国立大学法人愛媛大学, 株式会社ファインデックス filed Critical 国立大学法人愛媛大学
Publication of WO2020137544A1 publication Critical patent/WO2020137544A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
    • A61B3/024—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for determining the visual field, e.g. perimeter types

Definitions

  • the present invention relates to a visual field inspection device. More specifically, it relates to a visual field inspection device used for inspecting various diseases and the degree of progress of each disease.
  • the visual field test is performed to examine diseases such as glaucoma, retinitis pigmentosa, diabetic retinopathy, retinal detachment, and macular degeneration, and the degree of progress of each disease.
  • a Goldman perimeter or Humphrey perimeter is used.
  • the perimeter of these devices measures the field of view by measuring the area visible around one point when gazing at one point. Specifically, the face is fixed to the perimeter, and the subject is made to stare at the center mark shown on the display unit inside the perimeter. In that state, light or the like is caused to appear around the display unit, and when the light is seen, the subject sounds a buzzer. In this way, the field of view and the missing portion are checked by checking which position the subject can recognize the light.
  • Patent Documents 1 to 3 have been developed as technologies for reducing the burden of such visual field inspection. These documents disclose a technique of presenting an optotype in the periphery while gazing at the fixation point and using the optotype displayed in the periphery as a new fixation point. In these techniques, since the visual target currently viewed is set as the fixation point, the burden on the subject can be reduced as compared with the case of gazing at the fixed fixation point.
  • the fixation point and the visual target are displayed on the display.
  • the optotype When the optotype is displayed on the peripheral portion of the display, the optotype may be blurred or the shape of the optotype may be deformed. Then, the accuracy of the inspection in the peripheral portion may be reduced.
  • an object of the present invention is to provide a visual field inspection device capable of maintaining high accuracy of visual field inspection.
  • the visual field inspection apparatus of the present invention includes a display unit that displays an inspection target, A detection unit that detects whether or not the subject recognizes the test target displayed on the display unit, A display control unit that controls a position and timing at which the inspection target is displayed on the display unit; Equipped with The display control unit An inspection target display function for alternately displaying the inspection target at a reference position on the display unit and a peripheral position other than the reference position on the display unit, A reaction time measuring function for measuring the time from when the test optotype is displayed at the peripheral position until the subject recognizes the test optotype, and The display position of the reference inspection target displayed at the reference position and the display position of the peripheral inspection target displayed at the peripheral position after the reference inspection target are displayed are associated with each other, and one set information is displayed.
  • the inspection target display function is A display position adjusting function for adjusting the display position of the reference inspection target and the display position of the peripheral inspection target before displaying the reference inspection target associated with the peripheral inspection target on the display unit.
  • the display position adjustment function In the case where it is determined whether the position at which the peripheral inspection target is to be displayed is located in the vicinity of the edge of the display unit or in the repellent region, and when it is determined that the position is in the vicinity of the edge or the repelled region, the peripheral inspection target Of the set information in which the display position of the reference inspection target associated with the peripheral inspection target is changed such that the display position of the reference inspection target is changed and the relative distance to the peripheral inspection target is maintained.
  • the vicinity of the edge is a position where deformation of the peripheral inspection target, bleeding, or a difference in visibility from other positions may occur
  • the repellent area is an area where bleeding or deformation of the display image occurs.
  • the positions at which the peripheral inspection target and the reference inspection target are displayed on the display unit are shifted while maintaining the distance between the peripheral inspection target and the reference inspection target. Then, the peripheral inspection target can be displayed at a position where it is easy to perform an accurate inspection on the display unit. Therefore, it is possible to prevent a decrease in the accuracy of the visual field inspection.
  • the visual field inspection apparatus of the present embodiment is an apparatus used for visual field inspection of a subject, and is characterized in that it can prevent a decrease in the accuracy of visual field inspection.
  • the visual field inspection device 1 of the present embodiment includes a display unit 2, a detection unit 3, a storage unit 4, and a display control unit 10.
  • the display control unit 10 is configured to change the position at which the inspection target M is displayed on the display unit 2.
  • the inspection target M displayed by the visual field inspection device 1 is not particularly limited.
  • a Landolt ring, a character that is the subject's native language, or the like can be used, and a simple shape such as a black circle can also be used.
  • the optotypes (reference inspection optotypes BM) displayed at the reference position BP described later and the optotypes (peripheral inspection optotypes SM) displayed at the peripheral position SP do not have to be the same type of optotypes. That is, the reference test target BM and the peripheral test target SM may use different types of targets. For example, characters or the like may be displayed as the reference inspection target BM at the reference position BP, and simple black dots or the like may be displayed as the peripheral inspection target SM at the peripheral position SP. Of course, conversely, a simple black dot or the like may be displayed as the reference inspection target BM at the reference position BP, and a character or the like may be displayed as the peripheral inspection target SM at the peripheral position SP.
  • the reference position BP corresponds to the "display position of the reference inspection target" in the claims
  • the peripheral position SP corresponds to the "display position of the peripheral inspection target" in the claims.
  • the display unit 2 can display information supplied from the display control unit 10 or the outside based on an instruction from the display control unit 10 or the outside.
  • the information supplied from the display control unit 10 or the outside is, for example, the examination target M. That is, the display unit 2 can display the examination target M at a predetermined position based on the instruction from the display control unit 10.
  • the display unit 2 may use any display device as long as it can display the inspection target M at a relatively high speed.
  • a known display device such as a liquid crystal display or a plasma display can be used.
  • the size of the display unit 2 is also not particularly limited. However, it is desirable that the display unit 2 is small because the visual field inspection device can be downsized. The visual field in which a person can recognize characters is at most about 30 degrees from the center of the visual field. Therefore, the size of the display unit 2 is, for example, when the visual distance (distance from the subject to the display unit 2) is 450 mm and the length and width are about 300 mm ⁇ 520 mm (23-inch display), the field of view is sufficient. An inspection can be done.
  • the shape of the display unit 2 is not particularly limited, and may be square, rectangular, or any other shape.
  • a head-mounted display may be used as the display unit 2.
  • the visual field inspection device is not limited to the visual field inspection device 1 of the present embodiment, and is generally designed on the assumption that the inspection is performed while keeping the distance (visual distance) from the subject's eyes to the display unit 2 constant. ing. If a head-mounted display is used as the display unit 2, it becomes easy to keep a constant visual distance from the subject's eyes to the display (that is, the display unit 2) without the subject being aware of it. Moreover, even when a person moves his or her face, the relative position between the display (that is, the display unit 2) and the eyes of the subject does not change. Then, the visual field inspection device using the head mounted display can improve the accuracy of the visual field inspection as compared with the visual field inspection device using the display such as a liquid crystal display installed at a test place.
  • the detection unit 3 has a function of detecting whether or not the subject recognizes the examination target M displayed on the display unit 2.
  • the detection unit 3 has a visual line detection function 3a that detects the visual line of the subject.
  • the line-of-sight detection function 3a is a function of detecting a line-of-sight using a known eye tracking technique.
  • a known eye tracking technique for detecting a line of sight such as a corneal reflection method or an eyeball potential method can be adopted.
  • the eye tracking function can be used as the line-of-sight detection function 3a, which is preferable.
  • the detection unit 3 has a visual recognition determination function 3b to which information regarding the line of sight (visual line information) from the visual line detection function 3a is transmitted.
  • the visual recognition determination function 3b compares the line-of-sight information with the information regarding the display position of the inspection target M displayed on the display unit 2 by the display control unit 10 described later, and the subject recognizes the inspection target M. It has a function of determining whether or not it is done. For example, by comparing the information on the subject's line of sight based on the line-of-sight information with the information on the coordinates at which the examination target M on the display unit 2 is displayed, it is possible to determine whether the subject visually recognizes the examination target M. You can judge. Further, the visual recognition determination function 3b has a function of transmitting a trigger signal (recognition signal) when it is determined that the subject visually recognizes the examination target M.
  • the subject When determining whether or not the subject is visually observing the examination target M, it may be determined whether or not the movement of the subject's line of sight remains within a certain range. For example, if the line of sight of the subject stays within a certain range near the coordinates where the examination target M is displayed for a certain period of time or more, it may be determined that the subject is visually recognizing the examination target M.
  • the visual recognition determination function 3b may have a function of invalidating the measurement data when the reaction time described later is shorter than a certain time.
  • the reaction time is shorter than the fixed time, it is possible that the line of sight accidentally reached the position of the examination target M while the subject was moving the line of sight. Then, the reaction time becomes shorter than the original reaction time, which may reduce the inspection accuracy. Therefore, when the reaction time is shorter than the fixed time, the measurement data may be invalidated.
  • the above “constant time” may be changed depending on the subject or the like, or may be constant regardless of the subject or the like. For example, when the reaction time is 100 milliseconds or less, the measurement data may be invalidated regardless of the subject.
  • the storage unit 4 is connected to the display control unit 10 and has a function of transmitting information from each function of the display control unit 10 and storing the information. For example, it has a function of associating information about a position (coordinates) at which the peripheral inspection target SM is displayed, which is transmitted from the inspection target display function 11 of the display control unit 10, with a reaction time described later, and stores the information. ing.
  • the storage unit 4 supplies stored information (for example, display information described later) to the display unit 2 or transmits the information to the outside based on an instruction from the display control unit 10 or the outside. It also has a function.
  • the storage unit 4 also stores information about the display unit 2.
  • the information on the display unit 2 includes the size (width or height) and the shape (square or curvature of the peripheral portion) of the display unit 2.
  • the display unit 2 also stores information about a region (hereinafter, also referred to as a repellent region EE) in which bleeding, deformation, and the like of a display image occur for a certain amount or more.
  • the display control unit 10 has a function of controlling the position and timing at which the inspection target M is displayed on the display unit 2.
  • the display control unit 10 includes an inspection target display function 11, a display position adjustment function 12, a reaction time measurement function 14, and a dark spot determination function 15.
  • the inspection target display function 11 has a function of displaying the inspection target M on the display unit 2. More specifically, the inspection target display function 11 displays the reference inspection target BM and the peripheral inspection target SM at the reference position BP and the peripheral position SP other than the reference position BP on the display unit 2, respectively. have. Moreover, the inspection target display function 11 has a function of alternately displaying the reference inspection target BM at the reference position BP and the peripheral inspection target SM at the peripheral position SP. That is, the inspection target display function 11 displays the reference inspection target BM at the reference position BP (see FIG. 2A), and then displays the peripheral inspection target SM at the peripheral position SP (see FIG. 2).
  • the inspection target display function 11 has a function of repeatedly performing a series of operations from (A) to (D) in FIG. Further, the inspection target display function 11 has a function of transmitting a trigger signal (start signal) when the reference inspection target BM is displayed at the reference position BP.
  • displaying the reference inspection target BM at the reference position BP and the peripheral inspection target SM at the peripheral position SP alternately is performed means that one of the inspection targets M is displayed. Displaying the other test target M after the display disappears, and temporarily turning off both test targets M and then displaying only the other test target M , Is included.
  • both test targets M temporarily disappear the length of time during which both test targets M disappear is not particularly limited. As a time when both of them disappear, for example, a case of 17 milliseconds or less can be mentioned.
  • the inspection target display function 11 acquires display information regarding the inspection target M from the storage unit 4 and transmits the acquired display information to the display unit 2.
  • the inspection target M is displayed on the display unit 2.
  • the display information includes information on the reference inspection target BM displayed at the reference position BP (reference inspection target information) and a peripheral inspection target displayed at the peripheral position SP after displaying the reference inspection target BM.
  • Information of SM peripheral inspection target information
  • the state in which the reference inspection target information and the peripheral inspection target information are associated and stored in the storage unit 4 is not particularly limited. As an example of a state in which the reference inspection target information and the peripheral inspection target information are associated and stored in the storage unit 4, set information in which the reference inspection target information and the peripheral inspection target information are one set The state stored as can be mentioned (see FIG. 4).
  • the display information includes a plurality of reference examination optotype information and a plurality of peripheral examination optotype information, and the plurality of reference examination optotype information and the plurality of peripheral examination optotype information are associated with each other. ing.
  • the reference inspection target information and the peripheral inspection target information constitute the set information
  • a plurality of set information is included in the display information.
  • This display information is stored in the storage unit 4, and the display information is read from the storage unit 4 according to a command from the inspection target display function 11.
  • the information included in the standard inspection target information and the peripheral inspection target information in the display information described above will be described.
  • the information included in the reference inspection target information and the peripheral inspection target information in the display information is not limited to the information described below, and may include information such as the brightness and color of the reference inspection target BM. I do not care.
  • the standard inspection target information includes information on the standard position BP.
  • the information on the reference position BP is information such as the coordinates of the reference position BP on the display unit 2.
  • the reference position BP is a preset position, and the reference position BP is set to an appropriate position depending on the shape and size of the display unit 2.
  • the position where the reference position BP is set is not particularly limited and may be set at a position where an appropriate inspection can be performed.
  • the reference position BP may be set at the center of the display unit 2, or the reference position BP may be set at a position slightly deviated from the center of the display unit 2.
  • the visual field (visual field) of each eye may be set based on the standard visual field of a general person.
  • the reference position BP can be set in each divided area. That is, the reference position BP may be set at an appropriate position for each of the region for inspecting the left eye and the region for inspecting the right eye.
  • the reference position BP is set at the center of each region after the division, that is, when each eye is inspected.
  • the reference position BP can be set. Also in this case, the reference position BP may be set at a position slightly deviated from the center of each divided area.
  • the reference position BP at the central position in the visual field (field of view) of each eye in order to perform inspection with higher accuracy for each eye.
  • the visual field (visual field) of each eye may be set with reference to the standard visual field of a general person.
  • the reference inspection target information includes information on the reference inspection target BM displayed at the reference position BP.
  • the information on the reference test optotype BM displayed at the reference position BP is information on the size and shape of the reference test optotype BM to be displayed.
  • the size or shape of the reference test index BM displayed by the test index display function 11 may be a predetermined size or shape, or may be changed to an appropriate size or shape according to the subject.
  • the peripheral inspection target information includes information on the peripheral position SP for displaying the peripheral inspection target SM.
  • the information on the peripheral position SP is information such as coordinates on the display unit 2 different from the reference position BP and displaying the peripheral inspection target SM.
  • the information on the peripheral position SP is associated with the information on the reference position BP.
  • the standard inspection target information and the peripheral inspection target information constitute set information.
  • the coordinates of the reference position BP are BP1(a,b)
  • the coordinates of the peripheral position SP are defined as SP1(a+c,b+d) and the like
  • the reference position BP is defined. It is also possible to correlate the information regarding the information with the information regarding the peripheral position SP (see FIG. 4).
  • the peripheral inspection target information includes information on the peripheral inspection target SM to be displayed at the peripheral position SP.
  • the information on the peripheral inspection optotype SM to be displayed at the peripheral position SP is information on the size and shape of the peripheral inspection optotype SM to be displayed.
  • the size and shape of the peripheral inspection target SM displayed by the inspection target display function 11 may be a predetermined size or shape, or may be changed to an appropriate size or shape according to the subject.
  • the size and shape of the peripheral inspection target SM may be the same as or different from the reference inspection target BM.
  • the timing of switching the display between the reference inspection target BM and the peripheral inspection target SM is performed based on the trigger signal from the detection unit 3. Specifically, regarding the reference inspection target BM and the peripheral inspection target SM of one set information, the timing of switching from the display of the reference inspection target BM to the display of the peripheral inspection target SM and the peripheral inspection target of one set information. The timing at which the display of the target SM is switched to the display of the reference inspection target BM of the next set information is performed based on the trigger signal from the detection unit 3.
  • the inspection target display function 11 displays the reference inspection target BM at the reference position BP based on certain set information, or based on one set information.
  • the peripheral inspection target SM displayed based on one set information is erased, and another peripheral inspection target SM is displayed.
  • the reference inspection index BM is displayed at the reference position BP based on the set information.
  • the inspection target display function 11 performs a process of causing the reference inspection target BM and the peripheral inspection target SM to disappear when the trigger signal is input, or a process of switching from one set information to another set information. You may go to This has the advantage that the test can be performed quickly. The above process may be performed after a certain period of time has elapsed since the trigger signal was input. Thereby, advantages such as reduction of fatigue of the subject can be obtained.
  • the display position adjusting function 12 has a function of adjusting the position for displaying the peripheral inspection target SM and the position for displaying the reference inspection target BM based on the relationship between the peripheral position SP and the display unit 2. ing.
  • the distance from the reference position BP to the edge of the display unit 2 is short in the vertical direction. .. Then, in a certain set information, when the distance between the reference position BP and the peripheral position SP is longer than the distance from the reference position BP to the edge of the display unit 2, the peripheral position SP cannot be displayed on the display unit 2. That is, the range in which the visual field inspection can be performed may be narrowed.
  • the peripheral inspection target SM may be deformed due to the performance of the display unit 2, or the like. It may bleed. In this case, the visibility of the peripheral inspection optotype SM at that position may be worse or conversely improved as compared with the peripheral inspection optotype SM at another position. Then, at the position corresponding to the vicinity of the edge of the display unit 2, the accuracy of the visual field inspection may be reduced.
  • the display position adjusting function 12 of the display control unit 10 can change the set information before the inspection target display function 11 displays the reference inspection target BM and the peripheral inspection target SM based on the set information.
  • the display position adjusting function 12 compares the information on the peripheral position SP with the information on the display unit 2 for the set information to be displayed on the display unit 2 next, and displays the reference inspection target BM and the peripheral inspection target SM. It has the function of adjusting the position. Then, the display position adjusting function 12 also has a function of transmitting information (or information not adjusting) of the positions at which the reference inspection target BM and the peripheral inspection target SM are displayed to the inspection target display function 11. ..
  • the display position adjusting function 12 compares the information of the peripheral position SP of the set information with the information of the display unit 2 when the reference position BP is set to a predetermined position (such as the center of the display unit 2). Then, it is determined whether or not the peripheral position SP is present in the display unit 2. Then, when it is determined that the peripheral position SP exists in the display unit 2, the display position adjustment function 12 transmits the set information as it is to the inspection target display function 11.
  • the reference inspection target BM and the peripheral inspection target SM are displayed based on the transmitted set information.
  • the display position adjusting function 12 determines that the peripheral position SP is located in the display unit 2 and that the reference position BP and the peripheral position SP are present.
  • the set information in which the reference position BP is changed is created at a position where the relative position with respect to does not change.
  • the changed set information is transmitted to the inspection target display function 11, and based on the transmitted set information, the reference inspection target BM and the peripheral inspection target SM are provided at the changed reference position BP and peripheral position SP. It is displayed (see FIGS. 3C and 3D).
  • the display position adjusting function 12 compares the information of the peripheral position SP with the information of the display unit 2 when the reference position BP is set to a predetermined position (the center of the display unit 2 or the like), and the peripheral position SP is a repellent area. It is determined whether or not it is located in EE. Then, when it is determined that the peripheral position SP does not exist in the avoidance area EE, the display position adjustment function 12 transmits the set information as it is to the inspection target display function 11. The reference inspection target BM and the peripheral inspection target SM are displayed based on the transmitted set information.
  • the display position adjusting function 12 determines that the peripheral position SP is outside the avoidance area EE and the relative position between the reference position BP and the peripheral position SP.
  • Set information in which the reference position BP is changed is created at a position where the position does not change.
  • the changed set information is transmitted to the inspection target display function 11, and the reference inspection target BM and the peripheral inspection target SM are displayed at the changed reference position BP and peripheral position SP based on the transmitted set information. (See FIGS. 3A and 3B).
  • the reference inspection target BM and the peripheral inspection target SM are set while maintaining the relative positional relationship between the reference position BP and the peripheral position SP. It can be properly displayed on the display unit 2.
  • the reference position BP can be moved by the same distance in the same direction as the movement of the peripheral position SP to display the reference inspection index BM. Therefore, the visual field inspection can be performed accurately in a wide range regardless of the display unit 2 used.
  • the display position adjusting function 12 may change the set information immediately before sending it to the inspection target display function 11. Further, the display position adjusting function 12 may change the set information based on the information about the display unit 2 when the information about the display unit 2 is obtained, and may store the changed set information in the storage unit 4.
  • reaction time measuring function 14 is determined by the visual recognition determination function 3b of the detection unit 3 that the test subject has recognized the peripheral inspection target SM after the peripheral inspection target SM is displayed at the peripheral position SP by the inspection target display function 11. It has a function of measuring the time until the trigger signal (recognition signal) to that effect is input.
  • the inspection target display function 11 displays the peripheral inspection target SM on the display unit 2, and at the same time, the inspection target display function 11 transmits a trigger signal (start signal) to the reaction time measurement function 14. It Upon receiving the start signal, the reaction time measuring function 14 starts measuring time. Eventually, when the visual recognition determination function 3b of the detection unit 3 determines that the subject has recognized the peripheral inspection target SM, the detection signal is transmitted from the detection unit 3 to the reaction time measurement function 14. Then, the reaction time measuring function 14 finishes measuring the time and sends the measured reaction time to the storage unit 4. In the storage unit 4, the reaction time is stored in association with the information on the peripheral position SP.
  • the reaction time measurement function 14 does not measure the reaction time, but simply stores the time when the start signal is transmitted from the inspection target display function 11 and the time when the recognition signal is transmitted from the detection unit 3. Then, the time may be transmitted to the storage unit 4.
  • the dark spot determination function 15 has a function of determining whether or not the peripheral position SP is a dark spot based on the reaction time measured by the reaction time measurement function 14. In addition, the dark spot determination function 15 has a function of storing the dark spot information in the storage unit 4 in association with the information of the peripheral position SP and the reaction time when the peripheral position SP is determined as a dark spot. ..
  • the scotoma determination function 15 determines a scotoma.
  • the scotoma determination function 15 simply displays the peripheral inspection target SM at the peripheral position SP and then determines that the visual recognition determination function 3b of the detection unit 3 determines that the subject visually recognizes the peripheral inspection target SM.
  • the position can be determined as a dark spot.
  • the inspection eye display function 11 transmits the start signal to the reaction time measurement function 14 and when the detection signal is transmitted from the detection unit 3 to the reaction time measurement function 14, the dark spot determination function 15 Alternatively, the recognition signal may be transmitted. In this case, if the recognition signal is not input from the detection unit 3 to the scotoma determination function 15 for a certain period of time or more after the start signal is transmitted from the inspection target display function 11 to the reaction time measurement function 14, the peripheral position SP thereof is changed.
  • the function of determining a dark spot is provided in the dark spot determination function 15.
  • the dark spot determination function 15 is provided with a function of transmitting a signal for displaying the inspection target M based on the following display information to the inspection target display function 11. Then, the inspection can proceed without waiting for input more than necessary, so that the inspection time can be shortened.
  • the scotoma determination function 15 does not necessarily have to be provided.
  • the dark spot determination function 15 may not be provided.
  • the test optotype display function 11, the reaction time measurement function 14 and the like may be provided with the scotoma determination function 15.
  • the inspection target display function is displayed between the reference inspection target BM and the peripheral inspection target SM.
  • 11 may switch the display.
  • an input device such as a keyboard, joystick, or mouse may be provided.
  • the subject may not be able to input the trigger signal accurately and may not be able to perform an accurate examination.
  • the subject can visually recognize the reference inspection target BM and the peripheral inspection target SM, if the input error or time is required, the subject visually recognizes the reference inspection target BM and the peripheral inspection target SM. It may be judged that it could not be done. In order to prevent such a problem and shorten the operation time itself, it is preferable to employ an eye tracking device.
  • the visual field inspection apparatus of the present invention is suitable for an apparatus for inspecting scotoma used for judging diseases such as glaucoma, retinitis pigmentosa, diabetic retinopathy, retinal detachment, and macular degeneration.

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Abstract

Provided is a visual field test device in which it is possible to maintain a high level of accuracy of visual tests. This visual field test device has: a display unit 2; a detection unit 3 which detects whether or not a test subject has recognized a test optotype being displayed on the display unit 2; and a display control unit 10 which controls the timing and position at which the test optotype is to be displayed on the display unit 2. The control display unit 10 has: a test optotype display function 11 for causing test optotypes to be displayed alternately at a reference position and a peripheral position; and a reaction time measurement function 14 for measuring the time it takes for the test subject to recognize a test optotype after the test optotype have been displayed at the peripheral position. The display position of a reference test optotype and the display position of a peripheral test optotype are associated with each other and stored as a single set of information. The test optotype display function 11 comprises a display position adjustment function 12 which is for adjusting the display position of the reference test optotype and the display position of the peripheral test optotype on the basis of the relation between the display unit 2 and the display position of the peripheral test optotype.

Description

視野検査装置Visual field inspection device
　本発明は、視野検査装置に関する。さらに詳しくは、種々の疾患や各疾患の進行度を検査するために使用される視野検査装置に関する。 The present invention relates to a visual field inspection device. More specifically, it relates to a visual field inspection device used for inspecting various diseases and the degree of progress of each disease.
　視野検査は、緑内障や網膜色素変性症、糖尿病性網膜症、網膜剥離、黄斑変性などの疾患や各疾患の進行度を調べるために実施される。かかる視野検査は、ゴールドマン視野計やハンフリー視野計などが使用される。これらの機器による視野計では、一点を注視したときに周囲に見える範囲を測定して視野を測定する。具体的には、視野計に顔を固定して、被験者に視野計内の表示部に示されている中心のマークを見つめさせる。その状態で、表示部の周辺に光などを出現させて、その光が見えたときに、被験者にブザーを鳴らさせる。このようにして、被験者がどの位置の光を認識できるか否かを調べることによって、視野や欠落部を調べている。
病院の検査の基礎知識　インターネット
＜URL:　http://medical-checkup.info/article/43671142.html＞
公益財団法人日本眼科学会　インターネット
＜URL:　http://www.nichigan.or.jp/public/disease/ryokunai_ryokunai.jsp＞ The visual field test is performed to examine diseases such as glaucoma, retinitis pigmentosa, diabetic retinopathy, retinal detachment, and macular degeneration, and the degree of progress of each disease. For such visual field inspection, a Goldman perimeter or Humphrey perimeter is used. The perimeter of these devices measures the field of view by measuring the area visible around one point when gazing at one point. Specifically, the face is fixed to the perimeter, and the subject is made to stare at the center mark shown on the display unit inside the perimeter. In that state, light or the like is caused to appear around the display unit, and when the light is seen, the subject sounds a buzzer. In this way, the field of view and the missing portion are checked by checking which position the subject can recognize the light.
Basic knowledge of hospital inspection Internet <URL: http://medical-checkup.info/article/43671142.html>
Japan Ophthalmological Society Internet <URL: http://www.nichigan.or.jp/public/disease/ryokunai_ryokunai.jsp>
　しかし、上述したような視野計では、両目の検査が終わるまでに３０分程度の時間を要するうえ、視線を固定して検査を行うので、検査における被験者の負担が大きい。しかも、長時間の検査を行うので、検査中に注意力が低下し、欠陥でなくても光の認識ができなくなる等の問題も生じている。そして、視野検査を適切に実施するためには、検査技師が装置の操作や検査ミスを監視しなければならないので、被験者だけでなく、検査技師の負担も大きいという問題もある。 However, with the perimeter as described above, it takes about 30 minutes to complete the examination of both eyes, and since the examination is performed with the line of sight fixed, the burden on the subject in the examination is large. In addition, since the inspection is performed for a long time, attention is lowered during the inspection, and there is a problem that the light cannot be recognized even if it is not a defect. Further, in order to properly perform the visual field inspection, the inspection technician must monitor the operation of the device and the inspection error, so that not only the subject but also the inspection technician has a problem.
　かかる視野検査の負担を軽減する技術として特許文献１～３の技術が開発されている。これらの文献では、固視点を凝視した状態で周辺に視標を提示させて、その周辺に表示させた視標を新たな固視点とする技術が開示されている。これらの技術では、現在見ている視標を固視点にするので、固定された固視点を注視する場合に比べて、被験者の負担を軽減することができる。 The technologies of Patent Documents 1 to 3 have been developed as technologies for reducing the burden of such visual field inspection. These documents disclose a technique of presenting an optotype in the periphery while gazing at the fixation point and using the optotype displayed in the periphery as a new fixation point. In these techniques, since the visual target currently viewed is set as the fixation point, the burden on the subject can be reduced as compared with the case of gazing at the fixed fixation point.
特表２０１５－５０２２３８号公報Japanese Patent Publication No. 2015-502238 特開２００３－５４２公報JP, 2003-542, A 特開２０１１－１６１１２２号公報JP, 2011-161122, A
　ところで、特許文献１～３に記載の技術では、ディスプレイに固視点や視標を表示させる。視標をディスプレイの周辺部に表示した場合には、視標が滲んだり、視標の形状が変形したりすることがある。すると、周辺部における検査の精度が低下する可能性がある。 By the way, in the technologies described in Patent Documents 1 to 3, the fixation point and the visual target are displayed on the display. When the optotype is displayed on the peripheral portion of the display, the optotype may be blurred or the shape of the optotype may be deformed. Then, the accuracy of the inspection in the peripheral portion may be reduced.
　本発明は上記事情に鑑み、視野検査の精度を高く維持することができる視野検査装置を提供することを目的とする。 In view of the above circumstances, an object of the present invention is to provide a visual field inspection device capable of maintaining high accuracy of visual field inspection.
　本発明の視野検査装置は、検査視標を表示する表示部と、
該表示部に表示された検査視標を被験者が認識したか否かを検出する検出部と、
前記表示部に前記検査視標を表示させる位置およびタイミングを制御する表示制御部と、
を備え、
該表示制御部は、
前記表示部における基準位置と前記表示部における前記基準位置以外の周辺位置とに交互に前記検査視標を表示させる検査視標表示機能と、
前記周辺位置に前記検査視標を表示させてから、該検査視標を被験者が認識するまでの時間を測定する反応時間測定機能と、を備えており、
前記基準位置に表示される基準検査視標の表示位置と該基準検査視標を表示した後に前記周辺位置に表示される周辺検査視標の表示位置とが相互に関連付けられて、一つのセット情報として記憶されており、
前記検査視標表示機能は、
該周辺検査視標と関連付けられている前記基準検査視標を前記表示部に表示する前に、該基準検査視標の表示位置および前記周辺検査視標の表示位置を調整する表示位置調整機能を有し、
前記表示位置調整機能は、
前記周辺検査視標を表示する予定の位置が表示部のエッジ近傍又は忌避領域に位置するか否かを判断し、前記エッジ近傍又は前記忌避領域にあると判断した場合において、前記周辺検査視標の表示位置を変更し、かつ、該周辺検査視標との相対的な距離が維持されるように該周辺検査視標と関連付けられている前記基準検査視標の表示位置を変更したセット情報を作成する機能を有し、
前記エッジ近傍は、前記周辺検査視標の変形、にじみ又は他の位置との視認性の異なりの生じる可能性のある位置であり、
前記忌避領域は、表示画像のにじみや変形が生じる領域である、ことを特徴とする。 The visual field inspection apparatus of the present invention includes a display unit that displays an inspection target,
A detection unit that detects whether or not the subject recognizes the test target displayed on the display unit,
A display control unit that controls a position and timing at which the inspection target is displayed on the display unit;
Equipped with
The display control unit
An inspection target display function for alternately displaying the inspection target at a reference position on the display unit and a peripheral position other than the reference position on the display unit,
A reaction time measuring function for measuring the time from when the test optotype is displayed at the peripheral position until the subject recognizes the test optotype, and
The display position of the reference inspection target displayed at the reference position and the display position of the peripheral inspection target displayed at the peripheral position after the reference inspection target are displayed are associated with each other, and one set information is displayed. Is stored as
The inspection target display function is
A display position adjusting function for adjusting the display position of the reference inspection target and the display position of the peripheral inspection target before displaying the reference inspection target associated with the peripheral inspection target on the display unit. Have,
The display position adjustment function,
In the case where it is determined whether the position at which the peripheral inspection target is to be displayed is located in the vicinity of the edge of the display unit or in the repellent region, and when it is determined that the position is in the vicinity of the edge or the repelled region, the peripheral inspection target Of the set information in which the display position of the reference inspection target associated with the peripheral inspection target is changed such that the display position of the reference inspection target is changed and the relative distance to the peripheral inspection target is maintained. Has the ability to create,
The vicinity of the edge is a position where deformation of the peripheral inspection target, bleeding, or a difference in visibility from other positions may occur,
The repellent area is an area where bleeding or deformation of the display image occurs.
　本発明によれば、周辺検査視標と基準検査視標との距離を維持したまま、周辺検査視標および基準検査視標を表示部に表示する位置をずらす。すると、表示部において正確な検査を実施しやすい位置に周辺検査視標を表示させることができる。よって、視野検査の精度の低下を防止できる。 According to the present invention, the positions at which the peripheral inspection target and the reference inspection target are displayed on the display unit are shifted while maintaining the distance between the peripheral inspection target and the reference inspection target. Then, the peripheral inspection target can be displayed at a position where it is easy to perform an accurate inspection on the display unit. Therefore, it is possible to prevent a decrease in the accuracy of the visual field inspection.
本実施形態の視野検査装置のブロック図である。It is a block diagram of the visual field inspection device of this embodiment. 表示制御部の検査視標表示機能による検査視標の表示方法の概略説明図である。It is a schematic explanatory drawing of the display method of the test|inspection target by the test|inspection target display function of a display control part. 表示制御部の表示位置調整機能による検査視標の表示位置調整の概略説明図である。It is a schematic explanatory drawing of the display position adjustment of the test|inspection target by the display position adjustment function of a display control part. 表示情報の一例を示した図である。It is a figure showing an example of display information.
　本実施形態の視野検査装置は、被験者の視野検査に使用される装置であって、視野検査の精度の低下を防止できるようにしたことに特徴を有している。 The visual field inspection apparatus of the present embodiment is an apparatus used for visual field inspection of a subject, and is characterized in that it can prevent a decrease in the accuracy of visual field inspection.
＜視野検査装置１＞
　図１に示すように、本実施形態の視野検査装置１は、表示部２と、検出部３と、記憶部４と、表示制御部１０と、を備えている。この視野検査装置１では、表示制御部１０によって検査視標Ｍを表示部２に表示させる位置が変化するように構成している。 <Visual field inspection device 1>
As shown in FIG. 1, the visual field inspection device 1 of the present embodiment includes a display unit 2, a detection unit 3, a storage unit 4, and a display control unit 10. In this visual field inspection device 1, the display control unit 10 is configured to change the position at which the inspection target M is displayed on the display unit 2.
＜検査視標Ｍについて＞
　視野検査装置１が表示する検査視標Ｍはとくに限定されない。例えば、ランドルト環や被験者の母語となる文字等を使用することができるし、黒丸などの単純な形状の図形なども使用できる。 <About inspection target M>
The inspection target M displayed by the visual field inspection device 1 is not particularly limited. For example, a Landolt ring, a character that is the subject's native language, or the like can be used, and a simple shape such as a black circle can also be used.
　また、後述する基準位置ＢＰに表示させる視標（基準検査視標ＢＭ）と周辺位置ＳＰに表示させる視標（周辺検査視標ＳＭ）は、同じ種類の視標である必要はない。つまり、基準検査視標ＢＭと周辺検査視標ＳＭは異なる種類の視標を使用しても構わない。例えば、基準位置ＢＰには基準検査視標ＢＭとして文字等を表示させて、周辺位置ＳＰには周辺検査視標ＳＭとして単なる黒点等を表示させても構わない。もちろん、逆に、基準位置ＢＰには基準検査視標ＢＭとして単なる黒点等を表示させて、周辺位置ＳＰには周辺検査視標ＳＭとして文字等を表示させても構わない。なお、基準位置ＢＰが特許請求の範囲にいう「基準検査視標の表示位置」に相当し、周辺位置ＳＰが特許請求の範囲にいう「周辺検査視標の表示位置」に相当する。 Also, the optotypes (reference inspection optotypes BM) displayed at the reference position BP described later and the optotypes (peripheral inspection optotypes SM) displayed at the peripheral position SP do not have to be the same type of optotypes. That is, the reference test target BM and the peripheral test target SM may use different types of targets. For example, characters or the like may be displayed as the reference inspection target BM at the reference position BP, and simple black dots or the like may be displayed as the peripheral inspection target SM at the peripheral position SP. Of course, conversely, a simple black dot or the like may be displayed as the reference inspection target BM at the reference position BP, and a character or the like may be displayed as the peripheral inspection target SM at the peripheral position SP. The reference position BP corresponds to the "display position of the reference inspection target" in the claims, and the peripheral position SP corresponds to the "display position of the peripheral inspection target" in the claims.
＜表示部２＞
　表示部２は、表示制御部１０や外部からの指示に基づいて、表示制御部１０や外部から供給される情報を表示できる。表示制御部１０や外部から供給される情報とは、具体的には、例えば、検査視標Ｍである。すなわち、表示部２は、表示制御部１０からの指示に基づいて、検査視標Ｍを所定の位置に表示できる。 <Display unit 2>
The display unit 2 can display information supplied from the display control unit 10 or the outside based on an instruction from the display control unit 10 or the outside. The information supplied from the display control unit 10 or the outside is, for example, the examination target M. That is, the display unit 2 can display the examination target M at a predetermined position based on the instruction from the display control unit 10.
　なお、表示部２は、検査視標Ｍをある程度高速で表示できれば、どのような表示装置を使用してもよい。表示部２として、例えば、液晶ディスプレイやプラズマディスプレイ等の公知の表示装置を使用することができる。この表示部２の大きさもとくに限定されない。ただし、表示部２が小さいと視野検査装置を小型化できるので望ましい。人が文字などを認識できる視野は、視野中心からせいぜい３０度程度の範囲である。したがって、表示部２の大きさは、例えば、視距離（被験者から表示部２までの距離）が４５０ｍｍの場合、縦横の長さが３００ｍｍ×５２０ｍｍ程度（２３インチディスプレイ）であれば、十分に視野検査を行うことができる。なお、表示部２の形状はとくに限定されず、正方形でも長方形でもよいし、その他の形状でもよい。 Note that the display unit 2 may use any display device as long as it can display the inspection target M at a relatively high speed. As the display unit 2, for example, a known display device such as a liquid crystal display or a plasma display can be used. The size of the display unit 2 is also not particularly limited. However, it is desirable that the display unit 2 is small because the visual field inspection device can be downsized. The visual field in which a person can recognize characters is at most about 30 degrees from the center of the visual field. Therefore, the size of the display unit 2 is, for example, when the visual distance (distance from the subject to the display unit 2) is 450 mm and the length and width are about 300 mm×520 mm (23-inch display), the field of view is sufficient. An inspection can be done. The shape of the display unit 2 is not particularly limited, and may be square, rectangular, or any other shape.
　また、表示部２として、ヘッドマウントディスプレイのディスプレイを使用してもよい。本実施形態の視野検査装置１に限らず、視野検査装置は、一般的に、被験者の目から表示部２までの距離（視距離）を一定に保って検査を実施することを前提に設計されている。表示部２としてヘッドマウントディスプレイを使用すれば、被験者が意識しなくても、被験者の目からディスプレイ（つまり表示部２）までの視距離を一定に保ちやすくなる。しかも、人が顔を動かした場合でも、ディスプレイ（つまり表示部２）と被験者の目との相対的な位置が変化しない。すると、ヘッドマウントディスプレイを使用した視野検査装置は、液晶ディスプレイ等のように試験場所などに設置されたディスプレイを使用した視野検査装置に比べて、視野検査の精度を向上させることができる。 Also, a head-mounted display may be used as the display unit 2. The visual field inspection device is not limited to the visual field inspection device 1 of the present embodiment, and is generally designed on the assumption that the inspection is performed while keeping the distance (visual distance) from the subject's eyes to the display unit 2 constant. ing. If a head-mounted display is used as the display unit 2, it becomes easy to keep a constant visual distance from the subject's eyes to the display (that is, the display unit 2) without the subject being aware of it. Moreover, even when a person moves his or her face, the relative position between the display (that is, the display unit 2) and the eyes of the subject does not change. Then, the visual field inspection device using the head mounted display can improve the accuracy of the visual field inspection as compared with the visual field inspection device using the display such as a liquid crystal display installed at a test place.
＜検出部３＞
　検出部３は、表示部２に表示された検査視標Ｍを被験者が認識したか否かを検出する機能を有するものである。 <Detection unit 3>
The detection unit 3 has a function of detecting whether or not the subject recognizes the examination target M displayed on the display unit 2.
＜視線検出機能３ａ＞
　この検出部３は、被験者の視線を検出する視線検出機能３ａを有している。この視線検出機能３ａは、公知のアイトラッキング技術を用いて視線を検出する機能である。検出部３に、例えば、角膜反射法や眼球電位法等、視線を検出する公知のアイトラッキング技術を採用できる。なお、表示部２として、アイトラッキング機能を有しているヘッドマウントディスプレイのディスプレイを使用した場合には、そのアイトラッキング機能を視線検出機能３ａとして使用できるため、好ましい。 <Gaze detection function 3a>
The detection unit 3 has a visual line detection function 3a that detects the visual line of the subject. The line-of-sight detection function 3a is a function of detecting a line-of-sight using a known eye tracking technique. For the detection unit 3, for example, a known eye tracking technique for detecting a line of sight such as a corneal reflection method or an eyeball potential method can be adopted. In addition, when a display of a head mounted display having an eye tracking function is used as the display unit 2, the eye tracking function can be used as the line-of-sight detection function 3a, which is preferable.
＜視認判断機能３ｂ＞
　検出部３は、視線検出機能３ａからの視線に関する情報（視線情報）が送信される視認判断機能３ｂを有している。この視認判断機能３ｂは、視線情報と、後述する表示制御部１０によって表示部２に表示されている検査視標Ｍの表示位置に関する情報と、を比較して、被験者が検査視標Ｍを認識したか否かを判断する機能を有している。例えば、視線情報に基づいて被験者の視線の情報と、表示部２における検査視標Ｍが表示されている座標の情報と、を比較することによって、被験者が検査視標Ｍを視認しているかを判断することができる。また、視認判断機能３ｂは、被験者が検査視標Ｍを視認したと判断すると、トリガー信号（認識信号）を発信する機能を有している。 <Visual recognition determination function 3b>
The detection unit 3 has a visual recognition determination function 3b to which information regarding the line of sight (visual line information) from the visual line detection function 3a is transmitted. The visual recognition determination function 3b compares the line-of-sight information with the information regarding the display position of the inspection target M displayed on the display unit 2 by the display control unit 10 described later, and the subject recognizes the inspection target M. It has a function of determining whether or not it is done. For example, by comparing the information on the subject's line of sight based on the line-of-sight information with the information on the coordinates at which the examination target M on the display unit 2 is displayed, it is possible to determine whether the subject visually recognizes the examination target M. You can judge. Further, the visual recognition determination function 3b has a function of transmitting a trigger signal (recognition signal) when it is determined that the subject visually recognizes the examination target M.
　被験者が検査視標Ｍを視認しているか否かを判断する際には、被験者の視線の動きが一定の範囲内に留まっているか否かを判断してもよい。例えば、被験者の視線が検査視標Ｍが表示されている座標近傍の一定の範囲内に一定の時間以上留まっていれば、被験者が検査視標Ｍを視認していると判断してもよい。 When determining whether or not the subject is visually observing the examination target M, it may be determined whether or not the movement of the subject's line of sight remains within a certain range. For example, if the line of sight of the subject stays within a certain range near the coordinates where the examination target M is displayed for a certain period of time or more, it may be determined that the subject is visually recognizing the examination target M.
　なお、視認判断機能３ｂは、後述する反応時間が一定の時間よりも短い場合には、その測定データを無効にする機能を有してもよい。反応時間が一定の時間よりも短い場合には、被験者が視線を移動させているときに、偶然に検査視標Ｍの位置に視線が到達した可能性が有る。そうすると、反応時間が本来の反応時間よりも短くなるため、検査精度が低下する可能性がある。したがって、反応時間が一定の時間よりも短い場合には、測定データを無効にしてもよい。上述した「一定の時間」は、被験者等によって変更しても構わないし、被験者等によらず一定にしても構わない。例えば、反応時間が１００ミリ秒以下の場合には、被検者によらず、その測定データを無効にするようにしても構わない。 Note that the visual recognition determination function 3b may have a function of invalidating the measurement data when the reaction time described later is shorter than a certain time. When the reaction time is shorter than the fixed time, it is possible that the line of sight accidentally reached the position of the examination target M while the subject was moving the line of sight. Then, the reaction time becomes shorter than the original reaction time, which may reduce the inspection accuracy. Therefore, when the reaction time is shorter than the fixed time, the measurement data may be invalidated. The above "constant time" may be changed depending on the subject or the like, or may be constant regardless of the subject or the like. For example, when the reaction time is 100 milliseconds or less, the measurement data may be invalidated regardless of the subject.
＜記憶部４＞
　記憶部４は、表示制御部１０と接続されており、表示制御部１０の各機能から情報が送信され、その情報を記憶する機能を有している。例えば、表示制御部１０の検査視標表示機能１１から送信される、周辺検査視標ＳＭを表示させた位置（座標）に関する情報と、後述する反応時間と、を関連付けて記憶する機能を有している。 <Memory unit 4>
The storage unit 4 is connected to the display control unit 10 and has a function of transmitting information from each function of the display control unit 10 and storing the information. For example, it has a function of associating information about a position (coordinates) at which the peripheral inspection target SM is displayed, which is transmitted from the inspection target display function 11 of the display control unit 10, with a reaction time described later, and stores the information. ing.
　加えて、記憶部４は、表示制御部１０や外部からの指示に基づいて、記憶している情報（例えば、後述する表示情報等）を表示部２に供給したり、外部に送信したりする機能も有している。 In addition, the storage unit 4 supplies stored information (for example, display information described later) to the display unit 2 or transmits the information to the outside based on an instruction from the display control unit 10 or the outside. It also has a function.
　さらに、記憶部４には、表示部２に関する情報も記憶されている。表示部２に関する情報とは、表示部２の大きさ（幅や高さ）や、形状（四角形や周辺部の曲率など）を含む。また、表示部２において、表示画像のにじみや変形等が一定以上生じる領域（以下、忌避領域ＥＥという場合がある）に関する情報も記憶されていることが望ましい。 Further, the storage unit 4 also stores information about the display unit 2. The information on the display unit 2 includes the size (width or height) and the shape (square or curvature of the peripheral portion) of the display unit 2. In addition, it is preferable that the display unit 2 also stores information about a region (hereinafter, also referred to as a repellent region EE) in which bleeding, deformation, and the like of a display image occur for a certain amount or more.
＜表示制御部１０＞
　表示制御部１０は、表示部２に検査視標Ｍを表示させる位置およびタイミングを制御する機能を有するものである。この表示制御部１０は、検査視標表示機能１１と、表示位置調整機能１２と、反応時間測定機能１４と、暗点判断機能１５と、を備えている。 <Display control unit 10>
The display control unit 10 has a function of controlling the position and timing at which the inspection target M is displayed on the display unit 2. The display control unit 10 includes an inspection target display function 11, a display position adjustment function 12, a reaction time measurement function 14, and a dark spot determination function 15.
＜検査視標表示機能１１＞
　検査視標表示機能１１は、表示部２に検査視標Ｍを表示させる機能を有する。より詳しく説明すると、検査視標表示機能１１は、表示部２における基準位置ＢＰと、基準位置ＢＰ以外の周辺位置ＳＰとに、それぞれ基準検査視標ＢＭと周辺検査視標ＳＭとを表示させる機能を有している。しかも、検査視標表示機能１１は、基準位置ＢＰにおける基準検査視標ＢＭの表示と、周辺位置ＳＰにおける周辺検査視標ＳＭの表示を交互に実施させる機能を有している。つまり、検査視標表示機能１１は、基準位置ＢＰに基準検査視標ＢＭを表示させ（図２の（Ａ）参照）、その後に周辺位置ＳＰに周辺検査視標ＳＭを表示させ（図２の（Ｂ）参照）、その後に再び基準位置ＢＰに基準検査視標ＢＭを表示させ（図２の（Ｃ）参照）、その後に周辺位置ＳＰに周辺検査視標ＳＭを表示させる（図２の（Ｄ）参照）。そして、検査視標表示機能１１は、図２の（Ａ）から（Ｄ）までの一連の作業を繰り返し実施する機能を有している。また、検査視標表示機能１１は、基準位置ＢＰに基準検査視標ＢＭを表示させるとトリガー信号（開始信号）を発信する機能を有している。 <Inspection target display function 11>
The inspection target display function 11 has a function of displaying the inspection target M on the display unit 2. More specifically, the inspection target display function 11 displays the reference inspection target BM and the peripheral inspection target SM at the reference position BP and the peripheral position SP other than the reference position BP on the display unit 2, respectively. have. Moreover, the inspection target display function 11 has a function of alternately displaying the reference inspection target BM at the reference position BP and the peripheral inspection target SM at the peripheral position SP. That is, the inspection target display function 11 displays the reference inspection target BM at the reference position BP (see FIG. 2A), and then displays the peripheral inspection target SM at the peripheral position SP (see FIG. 2). (See (B)), and thereafter, the reference inspection target BM is again displayed at the reference position BP (see (C) of FIG. 2), and thereafter the peripheral inspection target SM is displayed at the peripheral position SP (( of FIG. 2). See D)). The inspection target display function 11 has a function of repeatedly performing a series of operations from (A) to (D) in FIG. Further, the inspection target display function 11 has a function of transmitting a trigger signal (start signal) when the reference inspection target BM is displayed at the reference position BP.
　なお、一つ上の段落における、「基準位置ＢＰにおける基準検査視標ＢＭの表示と、周辺位置ＳＰにおける周辺検査視標ＳＭの表示を交互に実施させる」ことは、一方の検査視標Ｍの表示が消えてから他方の検査視標Ｍを表示させること、および、一時的に両方の検査視標Ｍが消えた状態となり、その後に他方の検査視標Ｍだけが表示された状態になること、を含んでいる。一時的に両方の検査視標Ｍが消える場合、両方が消えている時間の長さはとくに限定されない。両方が消えている時間として、例えば、１７ミリ秒以下の場合を挙げることができる。 In the paragraph immediately above, "displaying the reference inspection target BM at the reference position BP and the peripheral inspection target SM at the peripheral position SP alternately is performed" means that one of the inspection targets M is displayed. Displaying the other test target M after the display disappears, and temporarily turning off both test targets M and then displaying only the other test target M , Is included. When both test targets M temporarily disappear, the length of time during which both test targets M disappear is not particularly limited. As a time when both of them disappear, for example, a case of 17 milliseconds or less can be mentioned.
　検査視標表示機能１１は、検査視標Ｍを表示部２に表示させる場合、検査視標Ｍに関する表示情報を記憶部４から取得して、取得した表示情報を表示部２に送信して、検査視標Ｍを表示部２に表示させる。この表示情報には、基準位置ＢＰに表示される基準検査視標ＢＭの情報（基準検査視標情報）と、この基準検査視標ＢＭを表示した後に周辺位置ＳＰに表示される周辺検査視標ＳＭの情報（周辺検査視標情報）と、が関連づけられて記憶部４に記憶されている。基準検査視標情報と周辺検査視標情報とが関連づけられて記憶部４に記憶されている状態は、とくに限定されない。基準検査視標情報と周辺検査視標情報とが関連づけられて記憶部４に記憶されている状態の一例として、基準検査視標情報と周辺検査視標情報とが一つのセットとなったセット情報として記憶されている状態を挙げることができる（図４参照）。 When the inspection target M is displayed on the display unit 2, the inspection target display function 11 acquires display information regarding the inspection target M from the storage unit 4 and transmits the acquired display information to the display unit 2. The inspection target M is displayed on the display unit 2. The display information includes information on the reference inspection target BM displayed at the reference position BP (reference inspection target information) and a peripheral inspection target displayed at the peripheral position SP after displaying the reference inspection target BM. Information of SM (peripheral inspection target information) is associated and stored in the storage unit 4. The state in which the reference inspection target information and the peripheral inspection target information are associated and stored in the storage unit 4 is not particularly limited. As an example of a state in which the reference inspection target information and the peripheral inspection target information are associated and stored in the storage unit 4, set information in which the reference inspection target information and the peripheral inspection target information are one set The state stored as can be mentioned (see FIG. 4).
　なお、表示情報には、複数の基準検査視標情報と複数の周辺検査視標情報とが含まれており、複数の基準検査視標情報と複数の周辺検査視標情報とが、それぞれ関連付けられている。基準検査視標情報と周辺検査視標情報とがセット情報を構成している場合には、複数のセット情報が表示情報に含まれている。この表示情報は記憶部４に記憶されており、表示情報は検査視標表示機能１１からの指令により記憶部４から読みだされる。 The display information includes a plurality of reference examination optotype information and a plurality of peripheral examination optotype information, and the plurality of reference examination optotype information and the plurality of peripheral examination optotype information are associated with each other. ing. When the reference inspection target information and the peripheral inspection target information constitute the set information, a plurality of set information is included in the display information. This display information is stored in the storage unit 4, and the display information is read from the storage unit 4 according to a command from the inspection target display function 11.
　上述した表示情報における基準検査視標情報および周辺検査視標情報に含まれる情報の一例を説明する。なお、表示情報における基準検査視標情報および周辺検査視標情報に含まれる情報は、以下で説明する情報に限られず、基準検査視標ＢＭ等の輝度や色等の情報が含まれていても構わない。 An example of the information included in the standard inspection target information and the peripheral inspection target information in the display information described above will be described. The information included in the reference inspection target information and the peripheral inspection target information in the display information is not limited to the information described below, and may include information such as the brightness and color of the reference inspection target BM. I do not care.
　基準検査視標情報には、基準位置ＢＰに関する情報が含まれている。基準位置ＢＰに関する情報とは、表示部２上における基準位置ＢＰの座標等の情報である。基準位置ＢＰは、予め設定された位置であり、基準位置ＢＰは表示部２の形状や大きさによって適切な位置に設定される。 The standard inspection target information includes information on the standard position BP. The information on the reference position BP is information such as the coordinates of the reference position BP on the display unit 2. The reference position BP is a preset position, and the reference position BP is set to an appropriate position depending on the shape and size of the display unit 2.
　基準位置ＢＰを設定する位置はとくに限定されず、適切な検査ができる位置に設定すればよい。例えば、表示部２の中央に基準位置ＢＰを設定しても構わないし、表示部２の中央から若干ずれた位置に基準位置ＢＰを設定しても構わない。しかし、より精度よく検査する上では、各眼の視野（視界）における中央に基準位置ＢＰが位置するように設定することが望ましい。この場合の各眼の視野（視界）は、一般的な人の標準的な視野を基準として設定してもよい。 The position where the reference position BP is set is not particularly limited and may be set at a position where an appropriate inspection can be performed. For example, the reference position BP may be set at the center of the display unit 2, or the reference position BP may be set at a position slightly deviated from the center of the display unit 2. However, for more accurate inspection, it is desirable to set the reference position BP at the center of the visual field (field of view) of each eye. In this case, the visual field (visual field) of each eye may be set based on the standard visual field of a general person.
　また、表示部２を左右で２分割して、分割後の各領域で左右の眼を別々に検査する場合には、分割後の各領域に基準位置ＢＰを設定することができる。つまり、左の眼を検査する領域と、右の眼を検査する領域とで、それぞれ適切な位置に基準位置ＢＰを設定すればよい。例えば、ヘッドマウントディスプレイを表示部２として使用する場合であれば、表示部２を左右方向で２分割にした際の分割後の各領域の中央に基準位置ＢＰ、つまり、各眼を検査する際の基準位置ＢＰを設定することができる。この場合も、分割後の各領域の中央から若干ずれた位置に基準位置ＢＰを設定しても構わない。ただし、各眼についてより精度よく検査する上では、各眼の視野（視界）における中央の位置に基準位置ＢＰを設定することが望ましい。この場合も、各眼の視野（視界）は、一般的な人の標準的な視野を基準として設定してもよい。 Further, when the display unit 2 is divided into left and right and the left and right eyes are separately inspected in each divided area, the reference position BP can be set in each divided area. That is, the reference position BP may be set at an appropriate position for each of the region for inspecting the left eye and the region for inspecting the right eye. For example, when the head mounted display is used as the display unit 2, when the display unit 2 is divided into two in the left-right direction, the reference position BP is set at the center of each region after the division, that is, when each eye is inspected. The reference position BP can be set. Also in this case, the reference position BP may be set at a position slightly deviated from the center of each divided area. However, it is desirable to set the reference position BP at the central position in the visual field (field of view) of each eye in order to perform inspection with higher accuracy for each eye. Also in this case, the visual field (visual field) of each eye may be set with reference to the standard visual field of a general person.
　また、基準検査視標情報には、基準位置ＢＰに表示させる基準検査視標ＢＭに関する情報が含まれている。基準位置ＢＰに表示させる基準検査視標ＢＭに関する情報とは、表示させる基準検査視標ＢＭの大きさや形状等に関する情報である。なお、検査視標表示機能１１によって表示させる基準検査視標ＢＭの大きさや形状は、予め定められた大きさや形状でも構わないし、被験者に合わせて適切な大きさや形状に変更しても構わない。 Further, the reference inspection target information includes information on the reference inspection target BM displayed at the reference position BP. The information on the reference test optotype BM displayed at the reference position BP is information on the size and shape of the reference test optotype BM to be displayed. The size or shape of the reference test index BM displayed by the test index display function 11 may be a predetermined size or shape, or may be changed to an appropriate size or shape according to the subject.
　周辺検査視標情報には、周辺検査視標ＳＭを表示させる周辺位置ＳＰに関する情報が含まれている。周辺位置ＳＰに関する情報とは、表示部２上における基準位置ＢＰとは異なる位置であって周辺検査視標ＳＭを表示させる座標等の情報である。この周辺位置ＳＰに関する情報は、基準位置ＢＰに関する情報と関連付けられている。例えば、基準検査視標情報と周辺検査視標情報とがセット情報を構成していると仮定する。この場合、一つのセット情報（ＳＥＴ１）において、基準位置ＢＰの座標をＢＰ１（ａ，ｂ）とすると、周辺位置ＳＰの座標をＳＰ１（ａ＋ｃ，ｂ＋ｄ）等のように定義して、基準位置ＢＰに関する情報と周辺位置ＳＰに関する情報とを関連付けても構わない（図４参照）。 The peripheral inspection target information includes information on the peripheral position SP for displaying the peripheral inspection target SM. The information on the peripheral position SP is information such as coordinates on the display unit 2 different from the reference position BP and displaying the peripheral inspection target SM. The information on the peripheral position SP is associated with the information on the reference position BP. For example, it is assumed that the standard inspection target information and the peripheral inspection target information constitute set information. In this case, in one set information (SET1), if the coordinates of the reference position BP are BP1(a,b), the coordinates of the peripheral position SP are defined as SP1(a+c,b+d) and the like, and the reference position BP is defined. It is also possible to correlate the information regarding the information with the information regarding the peripheral position SP (see FIG. 4).
　また、周辺検査視標情報には、周辺位置ＳＰに表示させる周辺検査視標ＳＭに関する情報が含まれている。周辺位置ＳＰに表示させる周辺検査視標ＳＭに関する情報とは、表示させる周辺検査視標ＳＭの大きさや形状等に関する情報である。なお、検査視標表示機能１１によって表示させる周辺検査視標ＳＭの大きさや形状は、予め定められた大きさや形状でも構わないし、被験者に合わせて適切な大きさや形状に変更しても構わない。また、周辺検査視標ＳＭの大きさや形状等は、基準検査視標ＢＭと同じでも構わないし、異なっていても構わない。 Further, the peripheral inspection target information includes information on the peripheral inspection target SM to be displayed at the peripheral position SP. The information on the peripheral inspection optotype SM to be displayed at the peripheral position SP is information on the size and shape of the peripheral inspection optotype SM to be displayed. The size and shape of the peripheral inspection target SM displayed by the inspection target display function 11 may be a predetermined size or shape, or may be changed to an appropriate size or shape according to the subject. The size and shape of the peripheral inspection target SM may be the same as or different from the reference inspection target BM.
　また、検査視標表示機能１１において、基準検査視標ＢＭと周辺検査視標ＳＭとの間で表示を切り替えるタイミングは、検出部３からのトリガー信号に基づいて行われる。具体的には、一つのセット情報の基準検査視標ＢＭと周辺検査視標ＳＭについて基準検査視標ＢＭの表示から周辺検査視標ＳＭの表示に切り替えるタイミングや、一つのセット情報の周辺検査視標ＳＭの表示から次のセット情報の基準検査視標ＢＭの表示に切り替えるタイミングは、検出部３からのトリガー信号に基づいて行われる。 Further, in the inspection target display function 11, the timing of switching the display between the reference inspection target BM and the peripheral inspection target SM is performed based on the trigger signal from the detection unit 3. Specifically, regarding the reference inspection target BM and the peripheral inspection target SM of one set information, the timing of switching from the display of the reference inspection target BM to the display of the peripheral inspection target SM and the peripheral inspection target of one set information. The timing at which the display of the target SM is switched to the display of the reference inspection target BM of the next set information is performed based on the trigger signal from the detection unit 3.
　例えば、検査視標表示機能１１は、検出部３からのトリガー信号が入力されると、あるセット情報に基づいて基準位置ＢＰに基準検査視標ＢＭを表示させる、または、一つのセット情報に基づいて表示されている基準検査視標ＢＭを消滅させて周辺位置ＳＰに周辺検査視標ＳＭを表示させるように切り替える。
　また、一つのセット情報に基づいて周辺位置ＳＰに周辺検査視標ＳＭが表示されている場合には、一つのセット情報に基づいて表示されている周辺検査視標ＳＭを消滅させて、他のセット情報に基づいて基準位置ＢＰに基準検査視標ＢＭを表示させる。 For example, when the trigger signal from the detection unit 3 is input, the inspection target display function 11 displays the reference inspection target BM at the reference position BP based on certain set information, or based on one set information. The reference inspection target BM displayed as is disappeared and the peripheral inspection target SM is displayed at the peripheral position SP.
Further, when the peripheral inspection target SM is displayed at the peripheral position SP based on one set information, the peripheral inspection target SM displayed based on one set information is erased, and another peripheral inspection target SM is displayed. The reference inspection index BM is displayed at the reference position BP based on the set information.
　なお、検査視標表示機能１１は、トリガー信号が入力されると同時に基準検査視標ＢＭや周辺検査視標ＳＭを表示消滅させる処理を行ったり、一つのセット情報から他のセット情報に切り替える処理を行ったりしても構わない。これにより、検査が迅速に実施できるという利点が得られる。また、トリガー信号が入力されてから一定の期間経過後、上記処理を行うようにしても構わない。これにより、被験者の疲労低減等の利点が得られる。 Note that the inspection target display function 11 performs a process of causing the reference inspection target BM and the peripheral inspection target SM to disappear when the trigger signal is input, or a process of switching from one set information to another set information. You may go to This has the advantage that the test can be performed quickly. The above process may be performed after a certain period of time has elapsed since the trigger signal was input. Thereby, advantages such as reduction of fatigue of the subject can be obtained.
＜表示位置調整機能１２＞
　表示位置調整機能１２は、周辺位置ＳＰと表示部２との関係に基づいて、周辺検査視標ＳＭを表示する位置と、基準検査視標ＢＭを表示する位置と、を調整する機能を有している。 <Display position adjustment function 12>
The display position adjusting function 12 has a function of adjusting the position for displaying the peripheral inspection target SM and the position for displaying the reference inspection target BM based on the relationship between the peripheral position SP and the display unit 2. ing.
　例えば、ディスプレイにおいて、表示部２の横方向（両目の並ぶ方向）に比べて上下方向の長さが短い場合には、上下方向では、基準位置ＢＰから表示部２のエッジまでの距離が短くなる。すると、あるセット情報において、基準位置ＢＰと周辺位置ＳＰとの距離が、基準位置ＢＰから表示部２のエッジまでの距離よりも長い場合には、周辺位置ＳＰを表示部２に表示できなくなる。つまり、視野検査できる範囲が狭くなる可能性がある。 For example, in the display, when the length in the vertical direction is shorter than the horizontal direction of the display unit 2 (the direction in which both eyes are arranged), the distance from the reference position BP to the edge of the display unit 2 is short in the vertical direction. .. Then, in a certain set information, when the distance between the reference position BP and the peripheral position SP is longer than the distance from the reference position BP to the edge of the display unit 2, the peripheral position SP cannot be displayed on the display unit 2. That is, the range in which the visual field inspection can be performed may be narrowed.
　また、上下方向に限らず横方向であっても、周辺位置ＳＰが表示部２のエッジ近傍に表示される場合には、表示部２の性能等によって、周辺検査視標ＳＭが変形したり、にじんだりする可能性がある。この場合、その位置における周辺検査視標ＳＭの視認性が、他の位置の周辺検査視標ＳＭに比べて悪化したり逆に改善したりする可能性がある。すると、表示部２のエッジ近傍に対応する位置では、視野検査の精度が低下してしまう可能性がある。 Further, when the peripheral position SP is displayed near the edge of the display unit 2 not only in the vertical direction but also in the horizontal direction, the peripheral inspection target SM may be deformed due to the performance of the display unit 2, or the like. It may bleed. In this case, the visibility of the peripheral inspection optotype SM at that position may be worse or conversely improved as compared with the peripheral inspection optotype SM at another position. Then, at the position corresponding to the vicinity of the edge of the display unit 2, the accuracy of the visual field inspection may be reduced.
　そこで、セット情報に基づいて検査視標表示機能１１が基準検査視標ＢＭおよび周辺検査視標ＳＭを表示する前に、表示制御部１０の表示位置調整機能１２は、セット情報を変更できる。 Therefore, the display position adjusting function 12 of the display control unit 10 can change the set information before the inspection target display function 11 displays the reference inspection target BM and the peripheral inspection target SM based on the set information.
　表示位置調整機能１２は、次に表示部２に表示するセット情報について、周辺位置ＳＰの情報と表示部２の情報とを比較して、基準検査視標ＢＭおよび周辺検査視標ＳＭを表示する位置を調整する機能を有している。そして、表示位置調整機能１２は、基準検査視標ＢＭおよび周辺検査視標ＳＭを表示する位置を調整した情報（または調整しない情報）を検査視標表示機能１１に送信する機能も有している。 The display position adjusting function 12 compares the information on the peripheral position SP with the information on the display unit 2 for the set information to be displayed on the display unit 2 next, and displays the reference inspection target BM and the peripheral inspection target SM. It has the function of adjusting the position. Then, the display position adjusting function 12 also has a function of transmitting information (or information not adjusting) of the positions at which the reference inspection target BM and the peripheral inspection target SM are displayed to the inspection target display function 11. ..
　具体的には、表示位置調整機能１２は、基準位置ＢＰを所定の位置（表示部２の中央等）とした場合に、セット情報の周辺位置ＳＰの情報と表示部２の情報とを比較して、周辺位置ＳＰが表示部２内に存在しているか否かを判断する。
　そして、周辺位置ＳＰが表示部２内に存在していると判断した場合には、表示位置調整機能１２は、そのままのセット情報を検査視標表示機能１１に送信する。送信されたセット情報に基づいて、基準検査視標ＢＭおよび周辺検査視標ＳＭが表示される。
　一方、周辺位置ＳＰが表示部２内に存在していないと判断した場合には、表示位置調整機能１２は、周辺位置ＳＰが表示部２内に位置し、かつ、基準位置ＢＰと周辺位置ＳＰとの相対的な位置が変化しない位置に、基準位置ＢＰを変更したセット情報を作成する。そして、変更したセット情報が検査視標表示機能１１に送信され、送信されたセット情報に基づいて、変更された基準位置ＢＰおよび周辺位置ＳＰに、基準検査視標ＢＭおよび周辺検査視標ＳＭが表示される（図３（Ｃ）、（Ｄ）参照）。 Specifically, the display position adjusting function 12 compares the information of the peripheral position SP of the set information with the information of the display unit 2 when the reference position BP is set to a predetermined position (such as the center of the display unit 2). Then, it is determined whether or not the peripheral position SP is present in the display unit 2.
Then, when it is determined that the peripheral position SP exists in the display unit 2, the display position adjustment function 12 transmits the set information as it is to the inspection target display function 11. The reference inspection target BM and the peripheral inspection target SM are displayed based on the transmitted set information.
On the other hand, when it is determined that the peripheral position SP does not exist in the display unit 2, the display position adjusting function 12 determines that the peripheral position SP is located in the display unit 2 and that the reference position BP and the peripheral position SP are present. The set information in which the reference position BP is changed is created at a position where the relative position with respect to does not change. Then, the changed set information is transmitted to the inspection target display function 11, and based on the transmitted set information, the reference inspection target BM and the peripheral inspection target SM are provided at the changed reference position BP and peripheral position SP. It is displayed (see FIGS. 3C and 3D).
　また、表示位置調整機能１２は、基準位置ＢＰを所定の位置（表示部２の中央等）とした場合に、周辺位置ＳＰの情報と表示部２の情報を比較して周辺位置ＳＰが忌避領域ＥＥに位置するか否かを判断する。
　そして、周辺位置ＳＰが忌避領域ＥＥ内に存在していないと判断した場合には、表示位置調整機能１２は、そのままのセット情報を検査視標表示機能１１に送信する。送信されたセット情報に基づいて、基準検査視標ＢＭおよび周辺検査視標ＳＭが表示される。
　一方、周辺位置ＳＰが忌避領域ＥＥ内に位置すると判断した場合には、表示位置調整機能１２は、周辺位置ＳＰが忌避領域ＥＥ外となり、かつ、基準位置ＢＰと周辺位置ＳＰとの相対的な位置が変化しない位置に、基準位置ＢＰを変更したセット情報を作成する。そして、変更したセット情報が検査視標表示機能１１に送信され、送信されたセット情報に基づいて、変更された基準位置ＢＰおよび周辺位置ＳＰに基準検査視標ＢＭおよび周辺検査視標ＳＭが表示される（図３（Ａ）、（Ｂ）参照）。 Further, the display position adjusting function 12 compares the information of the peripheral position SP with the information of the display unit 2 when the reference position BP is set to a predetermined position (the center of the display unit 2 or the like), and the peripheral position SP is a repellent area. It is determined whether or not it is located in EE.
Then, when it is determined that the peripheral position SP does not exist in the avoidance area EE, the display position adjustment function 12 transmits the set information as it is to the inspection target display function 11. The reference inspection target BM and the peripheral inspection target SM are displayed based on the transmitted set information.
On the other hand, when it is determined that the peripheral position SP is located within the avoidance area EE, the display position adjusting function 12 determines that the peripheral position SP is outside the avoidance area EE and the relative position between the reference position BP and the peripheral position SP. Set information in which the reference position BP is changed is created at a position where the position does not change. Then, the changed set information is transmitted to the inspection target display function 11, and the reference inspection target BM and the peripheral inspection target SM are displayed at the changed reference position BP and peripheral position SP based on the transmitted set information. (See FIGS. 3A and 3B).
　以上のように、表示位置調整機能１２によってセット情報を変更すれば、基準位置ＢＰと周辺位置ＳＰとの相対的な位置関係は維持した状態で、基準検査視標ＢＭおよび周辺検査視標ＳＭを適切に表示部２に表示できる。例えば、周辺位置ＳＰを移動させた同じ方向に同じ距離だけ、基準位置ＢＰを移動させて基準検査視標ＢＭを表示できる。したがって、使用する表示部２に係らず、視野検査を幅広い範囲で精度よく実施できる。 As described above, if the set information is changed by the display position adjusting function 12, the reference inspection target BM and the peripheral inspection target SM are set while maintaining the relative positional relationship between the reference position BP and the peripheral position SP. It can be properly displayed on the display unit 2. For example, the reference position BP can be moved by the same distance in the same direction as the movement of the peripheral position SP to display the reference inspection index BM. Therefore, the visual field inspection can be performed accurately in a wide range regardless of the display unit 2 used.
　さらに、表示位置調整機能１２は、検査視標表示機能１１に送信する直前にセット情報を変更しても構わない。また、表示位置調整機能１２は、表示部２に関する情報が得られると、表示部２に関する情報に基づいてセット情報を変更し、変更したセット情報を記憶部４に記憶させても構わない。 Further, the display position adjusting function 12 may change the set information immediately before sending it to the inspection target display function 11. Further, the display position adjusting function 12 may change the set information based on the information about the display unit 2 when the information about the display unit 2 is obtained, and may store the changed set information in the storage unit 4.
（反応時間測定機能１４）
　反応時間測定機能１４は、検査視標表示機能１１によって周辺検査視標ＳＭが周辺位置ＳＰに表示された後、被験者が周辺検査視標ＳＭを認識したと検出部３の視認判断機能３ｂが判断した旨のトリガー信号（認識信号）が入力されるまでの時間を測定する機能を有している。 (Reaction time measurement function 14)
The reaction time measuring function 14 is determined by the visual recognition determination function 3b of the detection unit 3 that the test subject has recognized the peripheral inspection target SM after the peripheral inspection target SM is displayed at the peripheral position SP by the inspection target display function 11. It has a function of measuring the time until the trigger signal (recognition signal) to that effect is input.
　具体的には、検査視標表示機能１１によって周辺検査視標ＳＭが表示部２に表示されると同時に、検査視標表示機能１１から反応時間測定機能１４にトリガー信号（開始信号）が送信される。その開始信号を受信すると、反応時間測定機能１４が時間の測定を開始する。やがて、被験者が周辺検査視標ＳＭを認識したと検出部３の視認判断機能３ｂが判断すると、検出部３から反応時間測定機能１４に認識信号が送信される。すると、反応時間測定機能１４は時間の測定を終了し、測定された反応時間を、記憶部４に送信する。記憶部４では、反応時間が周辺位置ＳＰの情報と関連付けられて記憶される。 Specifically, the inspection target display function 11 displays the peripheral inspection target SM on the display unit 2, and at the same time, the inspection target display function 11 transmits a trigger signal (start signal) to the reaction time measurement function 14. It Upon receiving the start signal, the reaction time measuring function 14 starts measuring time. Eventually, when the visual recognition determination function 3b of the detection unit 3 determines that the subject has recognized the peripheral inspection target SM, the detection signal is transmitted from the detection unit 3 to the reaction time measurement function 14. Then, the reaction time measuring function 14 finishes measuring the time and sends the measured reaction time to the storage unit 4. In the storage unit 4, the reaction time is stored in association with the information on the peripheral position SP.
　なお、反応時間測定機能１４は、反応時間を測定せずに、単に、検査視標表示機能１１から開始信号が送信された時間と、検出部３から認識信号が送信された時間とを記憶して、その時間を記憶部４に送信するようにしても構わない。 The reaction time measurement function 14 does not measure the reaction time, but simply stores the time when the start signal is transmitted from the inspection target display function 11 and the time when the recognition signal is transmitted from the detection unit 3. Then, the time may be transmitted to the storage unit 4.
＜暗点判断機能１５＞
　暗点判断機能１５は、反応時間測定機能１４によって測定された反応時間に基づいて、周辺位置ＳＰが暗点か否かを判断する機能を有している。加えて、暗点判断機能１５は、その周辺位置ＳＰを暗点と判断した場合、暗点情報を、周辺位置ＳＰの情報や反応時間と関連付けて記憶部４に記憶させる機能を有している。 <Dark spot determination function 15>
The dark spot determination function 15 has a function of determining whether or not the peripheral position SP is a dark spot based on the reaction time measured by the reaction time measurement function 14. In addition, the dark spot determination function 15 has a function of storing the dark spot information in the storage unit 4 in association with the information of the peripheral position SP and the reaction time when the peripheral position SP is determined as a dark spot. ..
　暗点判断機能１５が暗点を判断する方法は、種々の方法を採用できる。例えば、暗点判断機能１５は、単純に、周辺位置ＳＰに周辺検査視標ＳＭを表示してから被験者が周辺検査視標ＳＭを視認したと検出部３の視認判断機能３ｂが判断するまでの時間が一定以上となった場合に、その位置を暗点と判断することができる。 Various methods can be adopted as the method for the scotoma determination function 15 to determine a scotoma. For example, the scotoma determination function 15 simply displays the peripheral inspection target SM at the peripheral position SP and then determines that the visual recognition determination function 3b of the detection unit 3 determines that the subject visually recognizes the peripheral inspection target SM. When the time becomes a certain value or more, the position can be determined as a dark spot.
　また、検査視標表示機能１１から反応時間測定機能１４に上記開始信号が送信されるとき、および、検出部３から反応時間測定機能１４に認識信号が送信されるときに、暗点判断機能１５にも認識信号が送信されるようにしても構わない。この場合、検査視標表示機能１１から反応時間測定機能１４に開始信号が送信された後に、一定時間以上、検出部３から暗点判断機能１５に認識信号が入力されない場合、その周辺位置ＳＰを暗点と判断する機能を暗点判断機能１５に設けておく。同時に、検査視標表示機能１１に対して、次の表示情報に基づいて検査視標Ｍを表示させる信号を送信する機能を暗点判断機能１５に設けておく。すると、必要以上に入力を待たずに検査を進められるので、検査時間を短縮できる。 In addition, when the inspection eye display function 11 transmits the start signal to the reaction time measurement function 14 and when the detection signal is transmitted from the detection unit 3 to the reaction time measurement function 14, the dark spot determination function 15 Alternatively, the recognition signal may be transmitted. In this case, if the recognition signal is not input from the detection unit 3 to the scotoma determination function 15 for a certain period of time or more after the start signal is transmitted from the inspection target display function 11 to the reaction time measurement function 14, the peripheral position SP thereof is changed. The function of determining a dark spot is provided in the dark spot determination function 15. At the same time, the dark spot determination function 15 is provided with a function of transmitting a signal for displaying the inspection target M based on the following display information to the inspection target display function 11. Then, the inspection can proceed without waiting for input more than necessary, so that the inspection time can be shortened.
　なお、暗点判断機能１５は必ずしも設けなくてもよい。例えば、視野検査終了後、記憶部４に記録されている情報を処理して暗点を判断する場合には、暗点判断機能１５は設けなくてもよい。もちろん、検査視標表示機能１１や反応時間測定機能１４等に暗点判断機能１５を具備させてもよい。 Note that the scotoma determination function 15 does not necessarily have to be provided. For example, when the information recorded in the storage unit 4 is processed to determine a dark spot after the visual field inspection is completed, the dark spot determination function 15 may not be provided. Of course, the test optotype display function 11, the reaction time measurement function 14 and the like may be provided with the scotoma determination function 15.
＜入力機能について＞
　上記例では、検出部３の視認判断機能３ｂによって被験者が検査視標Ｍを認識したと判断した場合に、検出部３からトリガー信号が検査視標表示機能１１に入力され、基準検査視標ＢＭと周辺検査視標ＳＭとの間で表示を切り替える場合を説明している。 <About input function>
In the above example, when the visual recognition determination function 3b of the detection unit 3 determines that the test subject has recognized the inspection target M, the trigger signal is input from the detection unit 3 to the inspection target display function 11 and the reference inspection target BM. The case where the display is switched between the peripheral inspection target SM and the peripheral inspection target SM will be described.
　一方、被験者が入力装置を操作することによって、トリガー信号が入力装置から検査視標表示機能１１に入力されると、基準検査視標ＢＭと周辺検査視標ＳＭとの間で検査視標表示機能１１が表示を切り替えるように構成してもよい。例えば、キーボードやジョイスティック、マウス等の入力装置を設けてもよい。かかる入力装置を設けた場合には、被験者が入力装置の操作に不慣れな場合、被験者が正確にトリガー信号を入力できず、正確な検査ができない可能性がある。例えば、被験者が基準検査視標ＢＭや周辺検査視標ＳＭを視認できていても、入力ミスや入力に時間を要した場合には、被験者が基準検査視標ＢＭや周辺検査視標ＳＭを視認できなかったと判断される可能性がある。かかる問題を防ぐため、また、操作時間自体の短縮のためには、アイトラッキングデバイスを採用することが好ましい。 On the other hand, when the test subject operates the input device to input the trigger signal to the inspection target display function 11 from the input device, the inspection target display function is displayed between the reference inspection target BM and the peripheral inspection target SM. 11 may switch the display. For example, an input device such as a keyboard, joystick, or mouse may be provided. When such an input device is provided, if the subject is unfamiliar with the operation of the input device, the subject may not be able to input the trigger signal accurately and may not be able to perform an accurate examination. For example, even if the subject can visually recognize the reference inspection target BM and the peripheral inspection target SM, if the input error or time is required, the subject visually recognizes the reference inspection target BM and the peripheral inspection target SM. It may be judged that it could not be done. In order to prevent such a problem and shorten the operation time itself, it is preferable to employ an eye tracking device.
　本発明の視野検査装置は、緑内障や網膜色素変性症、糖尿病性網膜症、網膜剥離、黄斑変性などの疾患を判断するために使用する暗点を検査する装置に適している。 The visual field inspection apparatus of the present invention is suitable for an apparatus for inspecting scotoma used for judging diseases such as glaucoma, retinitis pigmentosa, diabetic retinopathy, retinal detachment, and macular degeneration.
　　１　　　視野検査装置
　　２　　　表示部
　　３　　　検出部
　　４　　　記憶部
　１０　　　表示制御部
　１１　　　検査視標表示機能
　１２　　　表示位置調整機能
　１４　　　反応時間測定機能
　１５　　　暗点判断機能
　ＢＰ　　　基準位置
　ＳＰ　　　周辺位置
　　Ｍ　　　検査視標
　ＢＭ　　　基準検査視標
　ＳＭ　　　周辺検査視標
  1 visual field inspection device 2 display unit 3 detection unit 4 storage unit 10 display control unit 11 inspection target display function 12 display position adjustment function 14 reaction time measurement function 15 dark spot determination function BP reference position SP peripheral position M inspection target BM standard Inspection target SM Peripheral inspection target

Claims (2)

  1. 　検査視標を表示する表示部と、
    該表示部に表示された検査視標を被験者が認識したか否かを検出する検出部と、
    前記表示部に前記検査視標を表示させる位置およびタイミングを制御する表示制御部と、
    を備え、
    該表示制御部は、
    前記表示部における基準位置と前記表示部における前記基準位置以外の周辺位置とに交互に前記検査視標を表示させる検査視標表示機能と、
    前記周辺位置に前記検査視標を表示させてから、該検査視標を被験者が認識するまでの時間を測定する反応時間測定機能と、を備えており、
    前記基準位置に表示される基準検査視標の表示位置と該基準検査視標を表示した後に前記周辺位置に表示される周辺検査視標の表示位置とが相互に関連付けられて、一つのセット情報として記憶されており、
    前記検査視標表示機能は、
    該周辺検査視標と関連付けられている前記基準検査視標を前記表示部に表示する前に、該基準検査視標の表示位置および前記周辺検査視標の表示位置を調整する表示位置調整機能を有し、
    前記表示位置調整機能は、
    前記周辺検査視標を表示する予定の位置が表示部のエッジ近傍又は忌避領域に位置するか否かを判断し、前記エッジ近傍又は前記忌避領域にあると判断した場合において、前記周辺検査視標の表示位置を変更し、かつ、該周辺検査視標との相対的な距離が維持されるように該周辺検査視標と関連付けられている前記基準検査視標の表示位置を変更したセット情報を作成する機能を有し、
    前記エッジ近傍は、前記周辺検査視標の変形、にじみ又は他の位置との視認性の異なりの生じる可能性のある位置であり、
    前記忌避領域は、表示画像のにじみや変形が生じる領域である、
    ことを特徴とする視野検査装置。     A display unit that displays the inspection target,
    A detection unit that detects whether or not the subject recognizes the test target displayed on the display unit,
    A display control unit that controls a position and timing at which the inspection target is displayed on the display unit;
    Equipped with
    The display control unit
    An inspection target display function for alternately displaying the inspection target at a reference position on the display unit and a peripheral position other than the reference position on the display unit,
    A reaction time measuring function for measuring the time from when the test optotype is displayed at the peripheral position until the subject recognizes the test optotype, and
    The display position of the reference inspection target displayed at the reference position and the display position of the peripheral inspection target displayed at the peripheral position after the reference inspection target are displayed are associated with each other, and one set information is displayed. Is stored as
    The inspection target display function is
    A display position adjusting function for adjusting the display position of the reference inspection target and the display position of the peripheral inspection target before displaying the reference inspection target associated with the peripheral inspection target on the display unit. Have,
    The display position adjustment function,
    In the case where it is determined whether the position at which the peripheral inspection target is to be displayed is located in the vicinity of the edge of the display unit or in the repellent region, and when it is determined that the position is in the vicinity of the edge or the repelled region, the peripheral inspection target Of the set information in which the display position of the reference inspection target associated with the peripheral inspection target is changed such that the display position of the reference inspection target is changed and the relative distance to the peripheral inspection target is maintained. Has the ability to create,
    The vicinity of the edge is a position where deformation of the peripheral inspection target, bleeding, or a difference in visibility from other positions may occur,
    The repellent area is an area where bleeding or deformation of the display image occurs.
    A visual field inspection device characterized in that
  2. 　前記検出部は、
    被験者の視線を検出する視線検出機能と、
    該視線検出機能が検出した視線に基づいて被験者が前記検査視標を認識したか否かを判断
    する視認判断機能と、を有しており、
    前記検査視標表示機能は、
    被験者が前記検査視標を認識したと前記視認判断機能が判断すると、前記検査視標を表示
    する位置を、前記基準位置と前記周辺位置との間で切り換える
    ことを特徴とする請求項１記載の視野検査装置。
          The detection unit,
    A gaze detection function that detects the gaze of the subject,
    It has a visual recognition determination function of determining whether or not the subject recognizes the inspection target based on the visual line detected by the visual line detection function,
    The inspection target display function is
    2. The position for displaying the inspection target is switched between the reference position and the peripheral position when the visual recognition determination function determines that the test subject has recognized the inspection target. Visual field inspection device.
PCT/JP2019/048457 2018-12-25 2019-12-11 Visual field test device WO2020137544A1 (en)

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EP4241651A4 (en) * 2020-11-05 2024-04-17 FINDEX Inc. Characteristic inspection system

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JP2011224198A (en) * 2010-04-21 2011-11-10 Panasonic Electric Works Co Ltd Visual function testing apparatus
JP2013502962A (en) * 2009-08-28 2013-01-31 ケンブリッジ エンタープライズ リミテッド Field of view measurement system and method
JP2016140423A (en) * 2015-01-30 2016-08-08 株式会社ニデック Ophthalmologic apparatus
WO2017022757A1 (en) * 2015-08-03 2017-02-09 国立大学法人愛媛大学 Visual field measuring method, visual field measuring apparatus, and optotype

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JP2013502962A (en) * 2009-08-28 2013-01-31 ケンブリッジ エンタープライズ リミテッド Field of view measurement system and method
JP2011224198A (en) * 2010-04-21 2011-11-10 Panasonic Electric Works Co Ltd Visual function testing apparatus
JP2016140423A (en) * 2015-01-30 2016-08-08 株式会社ニデック Ophthalmologic apparatus
WO2017022757A1 (en) * 2015-08-03 2017-02-09 国立大学法人愛媛大学 Visual field measuring method, visual field measuring apparatus, and optotype

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4241651A4 (en) * 2020-11-05 2024-04-17 FINDEX Inc. Characteristic inspection system

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