WO2023119913A1 - 視野検査装置 - Google Patents
視野検査装置 Download PDFInfo
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- WO2023119913A1 WO2023119913A1 PCT/JP2022/041472 JP2022041472W WO2023119913A1 WO 2023119913 A1 WO2023119913 A1 WO 2023119913A1 JP 2022041472 W JP2022041472 W JP 2022041472W WO 2023119913 A1 WO2023119913 A1 WO 2023119913A1
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- 230000000007 visual effect Effects 0.000 title claims abstract description 129
- 238000012360 testing method Methods 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 238000007689 inspection Methods 0.000 claims description 28
- 238000012545 processing Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000008447 perception Effects 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 206010029216 Nervousness Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
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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
-
- 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
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors
-
- 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
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/113—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining or recording eye movement
Definitions
- the present invention relates to a visual field inspection device.
- a visual field inspection device for inspecting a visual field has been provided conventionally, and is disclosed in Patent Document 1 below, for example.
- the user is prompted to input whether or not the user is visually recognizing the optotype using an input device such as a button.
- Patent Document 2 describes a visual field test that automatically detects the line of sight, which is the direction in which the user is looking, by a line of sight detection device, and automatically determines whether the user is visually recognizing the optotype.
- the visual field test usually takes 10 minutes or more, and in the case of automatically determining visual recognition, as in the visual field test device disclosed in Patent Document 2, the user, who is the subject, sequentially displays on the display during that time. It is necessary to keep watching the visual target at all times.
- the visual field testing apparatus is a visual field testing apparatus for testing the visual field range of a user, comprising: a display for displaying a visual target; a line-of-sight detection unit that outputs line-of-sight information regarding a direction; a visual recognition determination unit that determines whether or not the user is visually recognizing the target based on the position information of the target and the line-of-sight information; a visual field inspection unit that sequentially displays the optotypes at predetermined positions and inspects the visual field range based on the output of the visual recognition determination unit, wherein the visual field inspection unit determines the A visual recognition detection feedback unit that, when detecting that the user is visually recognizing the visual target currently displayed on the display, performs feedback processing for informing the user of the detection for a predetermined period of time.
- the user by feeding back the detection of visual target visual recognition by the user, the user can be released from a tense state even for a short period of time, the user can concentrate more on the target, and a more accurate visual field test can be performed. It can be performed.
- FIG. 1 is a schematic diagram schematically showing the configuration of a visual target inspection apparatus according to an embodiment of the present invention.
- FIG. 2 is a diagram for explaining visual recognition detection feedback processing according to the embodiment of the present invention.
- FIG. 3 is a diagram for explaining a modified example of visual recognition detection feedback processing according to the embodiment of the present invention.
- FIG. 4 is a diagram for explaining a modified example of visual recognition detection feedback processing according to the embodiment of the present invention.
- a visual field inspection apparatus 1 according to an embodiment of the present invention will be described in detail below with reference to the drawings.
- the device side when a user who is a subject actually sees and visually recognizes visual targets sequentially displayed on the display 13 during a visual field test, the device side notifies the user of the fact that the visual recognition has been detected by feedback to the user. Characterized by
- the visual field inspection device 1 includes a head-mounted display (HMD) 10 and a control device 20 which is a computer connected to the HMD 10 via a communication cable.
- the HMD 10 is a device that is worn on the user's head during visual field testing, and includes a display 13 that displays visual targets, a camera 15 that captures the user's eyes, and the like.
- the HMD 10 has a line-of-sight detection function that automatically detects the line of sight, which is the direction in which the eyes of the user wearing the HMD 10 are looking, in cooperation with the line-of-sight detection unit 25 described later.
- the display 13 and the camera 15 are installed for the right eye and for the left eye, respectively.
- the control device 20 includes a computing device 70 such as a CPU (Central Processing Unit) for performing various computations, an HDD (Hard Disc Drive) for storing various information, and a RAM (Random and a storage device 75 such as Access Memory).
- a computing device 70 such as a CPU (Central Processing Unit) for performing various computations, an HDD (Hard Disc Drive) for storing various information, and a RAM (Random and a storage device 75 such as Access Memory).
- a computing device 70 such as a CPU (Central Processing Unit) for performing various computations
- an HDD Hard Disc Drive
- RAM Random and a storage device 75 such as Access Memory
- the storage device 75 includes a line-of-sight log storage unit 76 that sequentially records line-of-sight information detected by the line-of-sight detection unit 25, which will be described later, and a visual target storage unit 77 that records visual target information related to visual targets displayed on the display 13. ing.
- control device 20 functionally includes a line-of-sight detection unit 25, an optotype display unit 30, a visual recognition determination unit 40, a perception (visibility) determination unit 50, and a visual field inspection unit 60. function is realized by executing a predetermined program stored in the storage device 75 by the arithmetic device 70 .
- the line-of-sight detection unit 25 detects the direction in which the user is looking, that is, the line of sight, based on the captured image of the user's eyes, which is the output of the camera 15 . Specifically, the line-of-sight detection unit 25 outputs two deviation angles ( ⁇ , ⁇ ) in polar coordinates (spherical coordinates) as line-of-sight information (line-of-sight angle) representing the line-of-sight direction. This line-of-sight detection is performed independently for the right eye and the left eye.
- the optotype display unit 30 Based on the optotype information recorded in the optotype storage unit 77, the optotype display unit 30 sequentially displays a white optotype of a given size at a given coordinate position on the display 13 with a given sensitivity (brightness). to display.
- the visual recognition determination unit 40 determines whether or not the user is actually viewing and recognizing the visual target. Specifically, visual recognition determination is performed based on whether or not the extension of the line of sight detected by the line of sight detection unit 25 on a predetermined coordinate system physically collides with the target visual target. In this embodiment, the line-of-sight angle detected by the line-of-sight detection unit 25 is compared with a target angle representing the target line-of-sight position. .
- the visual recognition determination unit 40 may perform visual recognition determination using a logical determination method based on the line-of-sight information log.
- the visual recognition determination unit 40 may be configured to logically make a visual recognition determination when the line of sight is close to the target visual target and continues to be positioned near the target visual target.
- the perception determination unit 50 determines whether or not the user can see (visible) the visual target at a position away from the user's gaze position, that is, whether or not the user perceives it. For example, after the visual target is displayed on the display 13, the perception determination unit 50 determines, based on the sight line reaching trajectory and arrival time from the visual line position at the time when the visual target is displayed to reaching (visually recognizing) the visual target. Then, a perception judgment is made at the time when the visual target is displayed.
- the visual field inspection unit 60 controls the line-of-sight detection unit 25, the optotype display unit 30, the visual recognition determination unit 40, and the perception determination unit 50, and executes the visual field inspection.
- the visual field inspection unit 60 notifies the user of the visual recognition when it is detected by the output of the visual recognition determination unit 40 that the user has visually recognized the optotype displayed on the display 13 during the visual field inspection.
- a visual recognition detection feedback unit 65 is provided to notify.
- the visual recognition detection feedback unit 65 controls the visual target display unit 30 to change the color of the visual target displayed on the display 13 from the standard white to another color, thereby notifying the user of the visual recognition detection. I do.
- the visual recognition detection feedback unit 65 performs feedback processing by changing the color of the optotype to green for 300 ms after 500 ms from visual recognition detection. At the end of the feedback process, the visually recognized visual target is erased in green, and the next visual target is immediately displayed on the display 13 in standard white.
- FIG. 2(a) shows a state in which the target is displayed in standard white on the display 13
- FIG. 2(b) shows a state in which the target is displayed in green on the display 13.
- the feedback processing time is desirably between 200 and 800 ms in order to secure the time that the user can notice and to prevent the visual field test time from becoming long.
- the color used to change the optotype for feedback processing is not limited to green, and other colors such as blue and red can be used as appropriate as long as the user can easily recognize that the color has changed. can do.
- the user who is the subject is instructed to keep gazing at the optotype displayed on the display 13. Therefore, if the user is in a tense state during the test and loses concentration during the test, he or she may lose sight of the optotype. In some cases, it becomes impossible to keep track of, and the inspection accuracy decreases.
- the visual field testing apparatus 1 since the visual field testing apparatus 1 detects that the user has visually recognized the optotype and notifies the user by feedback, the user has a very short time until the next optotype is displayed. Although it is only time, since the patient is relieved from the strained state, it becomes much easier to maintain the concentration for the examination, and the accuracy of the examination can be further improved.
- the change in the color of the optotype can be easily noticed by the user who continues to look at the optotype, and it can be easily implemented by modifying the program without the need for additional components. can be played.
- the visual field inspection apparatus 1 has been described above. According to the present embodiment, the visual field inspection apparatus 1 detects visual target recognition by the user and notifies the user by feedback to the user. An accurate visual field test can be performed.
- the feedback is performed by changing the color of the optotype displayed on the display 13 for a predetermined period of time, but the feedback may be performed by changing the shape of the optotype, for example. Alternatively, both the color and shape of the optotype may be combined and changed.
- FIG. 3 is a diagram showing an example of a change in the shape of a visual target for feedback.
- FIG. 3(a) shows a state in which a standard circular optotype is displayed on the display 13
- FIG. 3(b) shows a state in which the optotype is displayed in the form of a star on the display 13. is shown.
- the normally circular indicia may be changed to the star shape only during feedback for a given period of time.
- other shapes such as polygons such as squares may be appropriately changed and fed back.
- a small vibrator may be placed on the HMD 10, and the vibrator may be vibrated during feedback for a predetermined period of time (for example, 300 ms).
- FIG. 4 is a schematic diagram schematically showing the configuration of the HMD 10 when tactile feedback is given to the user. As shown in the figure, by installing small transducers 18 inside the housing 11 of the HMD 10 on both sides, it is possible to give feedback to the user without shifting the mounting state of the HMD 10 .
- a notification sound may be emitted from a speaker (not shown) of the visual field inspection device 1 to notify the user of visual detection.
- feedback processing may be performed by combining visual feedback, tactile feedback, auditory feedback, and the like.
- the present invention is not limited to the above embodiments, and various modifications are possible without departing from the gist of the present invention.
- an HMD worn on the head is used as a display, a normal independent or wall-mounted liquid crystal monitor or the like may be used.
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Abstract
Description
10 HMD
11 筐体
13 ディスプレイ
15 カメラ
18 振動子
20 制御装置
25 視線検出部
30 視標表示部
40 視認判定部
50 知覚判定部
60 視野検査部
65 視認検知フィードバック部
70 演算装置
75 記憶装置
76 視線ログ記憶部
77 視標記憶部
Claims (5)
- ユーザーの視野範囲を検査する視野検査装置において、
視標を表示するためのディスプレイと、
前記ユーザーの視線を検出して前記視線の方向に関する視線情報を出力する視線検出部と、
前記視標の位置情報と前記視線情報とに基づき、前記ユーザーが前記視標を視認しているか否かを判定する視認判定部と、
前記ディスプレイ上の所定の位置に前記視標を順次表示し、前記視認判定部の出力に基づき、前記視野範囲を検査する視野検査部と、を備え、
前記視野検査部は、前記視認判定部の出力により前記ディスプレイ上に現在表示している前記視標を前記ユーザーが視認していることを検知すると、検知したことを前記ユーザーに対して所定の時間だけ知らせるフィードバック処理を行う視認検知フィードバック部を備えることを特徴とする視野検査装置。 - 前記視認検知フィードバック部は、前記フィードバック処理として、前記ディスプレイ上に現在表示されている視認された前記視標の色を変えることを特徴とする請求項1記載の視野検査装置。
- 前記視認検知フィードバック部は、前記フィードバック処理として、前記ディスプレイ上に現在表示されている視認された前記視標の形状を変えることを特徴とする請求項1又は2記載の視野検査装置。
- 前記視野検査部は、前記フィードバック処理の終了と共に視認された前記視標を消去し、その後、次の前記視標を前記ディスプレイ上に表示することを特徴とする請求項1乃至3何れか1項記載の視野検査装置。
- 前記フィードバック処理の時間は、200~800ms間であることを特徴とする請求項1乃至4何れか1項記載の視野検査装置。
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EP22910632.3A EP4427663A1 (en) | 2021-12-24 | 2022-11-08 | Visual field test device |
US18/743,015 US20240335104A1 (en) | 2020-06-16 | 2024-06-13 | Visual Field Testing Apparatus |
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Citations (3)
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JP2011161122A (ja) | 2010-02-15 | 2011-08-25 | Kansai Univ | 視野検査システム |
WO2017022757A1 (ja) | 2015-08-03 | 2017-02-09 | 国立大学法人愛媛大学 | 視野計測方法、視野計測装置および視力検査視標 |
WO2019050048A1 (ja) * | 2017-09-11 | 2019-03-14 | 株式会社ニコン | 眼科機器、管理装置、及び眼科機器の管理方法 |
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JP2011161122A (ja) | 2010-02-15 | 2011-08-25 | Kansai Univ | 視野検査システム |
WO2017022757A1 (ja) | 2015-08-03 | 2017-02-09 | 国立大学法人愛媛大学 | 視野計測方法、視野計測装置および視力検査視標 |
WO2019050048A1 (ja) * | 2017-09-11 | 2019-03-14 | 株式会社ニコン | 眼科機器、管理装置、及び眼科機器の管理方法 |
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