JP7097612B2 - Optometry device and optometry method - Google Patents

Description

The present invention relates to an optometry device and an optometry method.

Conventionally, as one of the optometry devices, a scanning laser ophthalmoscope (SLO) for capturing an image of the fundus of a subject has been known. In the imaging of the fundus image, visible light is irradiated to the retina of the subject from the scanning laser ophthalmoscope to project the gazing point, and while the subject is gazing at the gazing point, the inspector or the like scans. Alignment between the laser ophthalmoscope and the subject's eyeball is performed, and an image of the subject's fundus is captured by invisible light.

By the way, in telemedicine, which has become widespread in recent years, it is required to provide medical data (test results, etc.) for making a diagnosis to doctors. Therefore, in the field of ophthalmology, the development of portable optometry devices and the like that can be used in places other than medical institutions is being promoted.

When the conventional scanning laser optometry is portable, it is assumed that the conventional scanning laser optometry device is, for example, a composite optometry device combined with a spectacle-type retinal scanning direct illumination display (RSD). In this case, a method is conceivable in which the patient himself / herself takes an image of his / her own fundus with a composite optometry device and transmits the image data of the fundus image to a doctor via the Internet or the like.

Japanese Unexamined Patent Publication No. 2014-113250 Japanese Unexamined Patent Publication No. 9-276225

In order to capture the fundus image required for diagnosis by SLO, it is necessary to properly adjust the positional relationship between the pupil of the subject and the projection portion of the laser beam. Therefore, in the above-mentioned composite type optometry device, the subject adjusts the positional relationship between the pupil and the optometry device by himself / herself or with the assistance of the person in charge of examination.

However, in telemedicine, a medical worker in a remote location explains to the subject how to adjust the positional relationship between the subject's pupil and the optometry device, and the fundus imaged by the subject. It is difficult to tell the subject on the spot whether or not the image meets the required image quality.

In order to capture a fundus image by SLO, it is necessary to pass the laser beam through the pupil with a diameter of about 2 to 7 mm to reach the retina, and when the laser beam deviates from the pupil, the acquired fundus image is displayed. Eccentricity and chipping will occur. Therefore, the subject removes the optometry device after capturing the fundus image by himself / herself, confirms whether the captured fundus image is an image without the required eccentricity or chipping, and if the requirement is not satisfied. , The positional relationship between the pupil and the optometry device is changed, and the fundus image is taken again.

This work may be repeated until the required fundus image is captured, which is burdensome and complicated for the subject.

The disclosed technique was made in view of the above-mentioned circumstances, and is intended to allow the subject to take an appropriate image of his / her own fundus.

The disclosed techniques include a light source that emits visible and invisible light, an invisible light projection unit that scans the invisible light and irradiates the subject's retina with the invisible light, and the invisible light from the retina. A detection unit that detects the reflected light of the above, an image generation unit that generates image data showing an image of the fundus of the subject from the reflected light detected by the detection unit, and the image data generated by the image generation unit. A storage unit that holds the image data, and a visible light projection unit that scans the visible light based on the image data and projects an image of the fundus of the subject by the visible light onto the subject's retina. It is an eye examination device that has.

The subject can be made to take an appropriate image of his / her fundus.

It is a block diagram of the optometry apparatus of 1st Embodiment. It is a figure which shows the optical system of the optometry apparatus of 1st Embodiment. It is a figure explaining the appearance of the 1st Embodiment. It is a figure which shows the example of the appropriate fundus image which imaged by scanning invisible light. It is the first figure which shows the example of the fundus image which the subject is visually recognizing. It is a second figure which shows the example of the fundus image which the subject is visually recognizing. It is a figure explaining the function of the control part of the 1st Embodiment. It is a flowchart explaining the operation of the optometry apparatus of 1st Embodiment. It is a figure explaining the appearance of the optometry apparatus of the 2nd Embodiment. It is a block diagram of the optometry apparatus of the second embodiment. It is a figure explaining the function of the control part of the 2nd Embodiment. It is a flowchart explaining the operation of the optometry apparatus of 2nd Embodiment. It is a flowchart explaining other operation of the optometry apparatus of 2nd Embodiment.

(First embodiment)
The first embodiment will be described below with reference to the drawings. FIG. 1 is a block diagram of the optometry device of the first embodiment.

The optometry device 100 of the present embodiment includes a projection unit 10, a control unit 30, a detector 40, and an operation unit 41. The projection unit 10 includes a light source 11, an adjustment unit 12, a spectroscopic unit 13, an image projection optical system 14, an infrared optical optical system 15, a drive circuit 16, and an input circuit 17. The image projection optical system 14 has a scanning unit 20, and the infrared optical optical system 15 has a scanning unit 22. The scanning units 20 and 22 (scanners) are scanning mirrors such as MEMS (Micro Electro Mechanical System) mirrors or transmissive scanners. The control unit 30 includes a drive control unit 31, a signal processing unit 32, an image generation unit 33, and a storage unit 34.

The drive control unit 31 generates an image to be projected on the retina. An image signal is input to the input circuit 17 from the drive control unit 31. The drive circuit 16 drives the light source 11 and the scanning units 20 and 22 based on the image signal acquired by the input circuit 17 and the control signal of the drive control unit 31.

The light source 11 is, for example, visible light of red laser light (wavelength: about 610 nm to 660 nm), green laser light (wavelength: about 515 nm to 540 nm), blue laser light (wavelength: about 440 nm to 480 nm), and infrared laser light. It emits invisible light (wavelength: about 850 nm). That is, the light source 11 has laser diode chips for each of the red laser light, the green laser light, the blue laser light, and the infrared laser light in one module. The light source 11 may emit a laser beam having a single wavelength as visible light.

The adjusting unit 12 has a collimating lens, a toric lens, and / or an aperture, and forms the laser beam L emitted by the light source 11. The laser beam L is a beam obtained by synthesizing a red laser beam, a green laser beam, a blue laser beam, and / or an infrared laser beam, and the optical axes of the respective laser beams coincide with each other. The spectroscopic unit 13 is, for example, a dichroic mirror, and splits the laser beam L into visible laser beam La of red laser beam, green laser beam, and blue laser beam, and infrared laser beam Lb. The image projection optical system 14 scans the visible laser light La dispersed by the spectroscopic unit 13 in two dimensions by the scanning unit 20 and irradiates the subject's eye 70. The infrared optical optical system 15 scans the infrared laser light Lb dispersed by the spectroscopic unit 13 in two dimensions by the scanning unit 22 and irradiates the subject's eye 70. As an example, the conventional scanning type It realizes a part of the function of the laser ophthalmoscope (SLO).

The detector 40 is a photodetector such as an avalanche photodiode, and detects the infrared laser beam Lb reflected by the subject's eye 70. The path until the reflected infrared laser beam Lb reaches the detector 40 will be described later with reference to FIG. The signal processing unit 32 processes the output signal of the detector 40 based on the control signal from the drive control unit 31. The image generation unit 33 generates a two-dimensional image based on the signal processed by the signal processing unit 32.

The storage unit 34 stores image data representing a two-dimensional image generated by the image generation unit 33. The operation unit 41 is, for example, a shutter button or the like, and determines the timing at which the image data representing the two-dimensional image generated by the image generation unit 33 is captured and stored in the storage unit 34. The operation unit 41 may include a plurality of operation members.

The detector 40 and the signal processing unit 32 start detection at the timing when the light source 11 emits the infrared laser beam Lb based on the synchronization signal from the drive circuit 16.

In the drive control unit 31, the signal processing unit 32, and the image generation unit 33, a processor such as a CPU (Central Processing Unit) may cooperate with the program to perform processing. The drive control unit 31, the signal processing unit 32, and the image generation unit 33 may be a circuit designed exclusively for the drive control unit 31, the signal processing unit 32, and the image generation unit 33. The drive control unit 31, the signal processing unit 32, and the image generation unit 33 may be one circuit or different circuits.

FIG. 2 is a diagram showing an optical system of the optometry apparatus of the first embodiment. As shown in FIG. 2, the optometry device 100 of the present embodiment uses Maxwell vision to irradiate the retina 74 of a subject with a laser beam. The numerical aperture (NA) and / or the beam diameter of the laser beam L emitted by the light source 11 is adjusted by the adjusting unit 12. The laser light L is dispersed in the spectroscopic unit 13 into a visible laser light La of a red laser light, a green laser light, and a blue laser light, and an infrared laser light Lb. The spectroscopic unit 13 is, for example, a dichroic mirror that transmits visible laser light La and reflects infrared laser light Lb. The spectroscopic unit 13 is not limited to the dichroic mirror, and may be another optical element such as a dichroic prism.

The visible laser light La is reflected by the plane mirror 21 and scanned two-dimensionally by the scanning unit 20. The scanned visible laser light La irradiates the eye 70 of the subject via the lens 25, the compositing unit 26, and the lens 27. The visible laser light La converges in the vicinity of the crystalline lens 72, passes through the vitreous body 76, and irradiates the retina 74. As a result, an image is projected on the retina 74. The scanning unit 20 vibrates at a relatively high frequency, for example, 28 kHz such that 60 frames of images are projected per second.

The infrared laser beam Lb is reflected by the plane mirror 23 and scanned two-dimensionally by the scanning unit 22. The scanned infrared laser beam Lb irradiates the subject's eye 70 via the lens 24, the compositing unit 26, and the lens 27. The infrared laser beam Lb converges in the vicinity of the crystalline lens 72, passes through the vitreous body 76, and irradiates the retina 74. The infrared laser beam Lb is reflected by the retina 74. The reflected infrared laser beam Lb returns to the optical path in which the infrared laser beam Lb has traveled toward the retina 74. That is, the reflected infrared laser light Lb is an optical path in which the infrared laser light Lb travels toward the retina 74 in the order of the lens 27, the synthesis unit 26, the lens 24, the scanning unit 22, the plane mirror 23, and the spectroscopic unit 13. Is incident on the detector 40 via the half mirror 43 and the lens 44. As a result, the detector 40 detects the infrared laser beam Lb reflected by the retina 74. The state of the fundus of the eye 70 can be detected (acquisition of the state information of the fundus) based on the detection result such as the change in the brightness of the infrared laser beam Lb by the detector 40, and the fundus image is acquired as an example of the detection target. can do. The scanning unit 22 is relatively low, for example, 12.5 kHz, which corresponds to the case where an image of 25 frames is projected per second, so that the state of the fundus of the eye 70 can be detected by the infrared laser beam Lb. It vibrates at a frequency.

This infrared laser beam Lb is projected while scanning on the retina in order to acquire a two-dimensional fundus image, but because it is invisible light, the subject does not see the infrared laser beam Lb. In addition, the fundus image can be acquired.

In the present embodiment, the scanning angle of the visible laser light La by the scanning unit 20 and the scanning angle of the infrared laser light Lb by the scanning unit 22 are, for example, substantially the same magnitude. The synthesizing unit 26 is, for example, a dichroic mirror, and synthesizes the visible laser light La scanned by the scanning unit 20 and the infrared laser light Lb scanned by the scanning unit 22. The visible laser light La and the infrared laser light Lb have the same optical axes after being synthesized by the synthesis unit 26. The compositing unit 26 is not limited to the dichroic mirror, and may be another optical element such as a dichroic prism.

In the present embodiment, each of the image projection optical system 14 and the infrared optical optical system 15 has a scanning unit, but the present invention is not limited to this. The image projection optical system 14 and the infrared optical optical system 15 may use a common scanning unit (MEMS).

Next, the appearance of the optometry device 100 of the present embodiment will be described with reference to FIG. FIG. 3 is a diagram illustrating the appearance of the optometry apparatus of the first embodiment.

3A is a front view of the optometry device, FIG. 3B is a perspective view of the optometry device from the front side, and FIG. 3C is a rear view of the optometry device. It is a perspective view.

The optometry device 100 of the present embodiment has a housing 101 and a front panel 102. The front panel 102 is formed with a hole 103 for irradiating the eyeball of the subject with a laser beam.

The optometry device 100 of the present embodiment is used so that the subject looks into the hole 103 formed in the front panel 102 with one eye. That is, the optometry device 100 of the present embodiment is an optometry device for one eye.

The housing 101 has a cylindrical shape having a back panel 104 and a rectangular cross section (consisting of a pair of arc-shaped portions (circumferential surface portions) and a pair of linear-shaped portions (flat portions) parallel to each other). Includes case 105. The case 105 has a pair of flat surface portions 105a and 105b and a pair of circumferential surface portions 105c and 105d.

In the case 105, the back panel 104 is attached to one opening, and the front panel 102 is attached to the inside of the other opening. Further, the opening on the front panel 103 side of the case 105 has a curved edge and recesses 106 and 107 are formed.

In the optometry device 100 of the present embodiment, such a shape allows the subject to hold the optometry device 100 in his / her hand and bring it closer to his / her face, and when he / she looks into the hole 103, the dents 106 and 107 are formed. The nose of the subject becomes fitted, and the optometry device 100 can be fitted to the face of the subject.

Further, the flat surface portion 105a of the case 105 is provided with the operating member 108, and the flat surface portion 105b is provided with the operating member 109. The position of the operating member 109 on the flat surface portion 105b may be, for example, a position corresponding to the position of the operating member 108 when the flat surface portion 105a is turned upside down. The operating members 108 and 109 are operating members for capturing an image of the fundus of the subject.

Further, in the eye examination device 100 of the present embodiment, an infrared optical optical system (invisible light projection unit) 15 for capturing an image of the fundus (retina) of the subject and an imaged subject are captured in the housing 101. A projection unit 10 including an image projection optical system (visible light projection) 14 that projects an image of the fundus of a person onto the retina of the subject is stored.

The optometry device 100 of the present embodiment irradiates the retina of the subject with invisible light in a state where the subject is looking into the hole 103, detects the reflected light, and images an image of the retina of the subject. Get the data. In the following description, the image of the retina of the subject is referred to as a fundus image of the subject, and the image data showing the fundus image is referred to as fundus image data.

When the optometry device 100 acquires the fundus image data of the subject, the projection unit 10 irradiates the retina of the subject with visible light based on the fundus image data, and projects the acquired fundus image onto the retina of the subject. do. That is, in the optometry device 100 of the present embodiment, the subject is shown the current image of his / her own fundus.

When either the operation member 108 or the operation member 109 is operated while the fundus image is projected on the retina of the subject, the optometry device 100 is projected on the retina of the subject at that time. Capture and save the fundus image data of the fundus image. In other words, the optometry apparatus 100 captures a fundus image and acquires fundus image data.

Specifically, as shown in FIG. 3, when the operation member 108 is operated with the flat surface portion 105a as the upper surface, the optometry device 100 captures an image of the fundus of the right eye of the subject. Further, when the operation member 109 is operated with the flat surface portion 105b as the upper surface, the optometry device 100 captures an image of the fundus of the left eye of the subject.

In the present embodiment, by projecting the current fundus image on the retina of the subject in this way, the subject is made to visually recognize the fundus image, and whether or not the fundus image is properly captured. This can be confirmed in real time without taking the eye examination device 100 away from the eyes.

Hereinafter, an appropriate fundus image in the present embodiment will be described with reference to FIGS. 4 and 5. FIG. 4 is a diagram showing an example of an appropriate fundus image taken by scanning invisible light.

The optometry device 100 of the present embodiment projects the fundus image 401 onto the retina with visible light. At this time, the fundus image 401 may not be properly projected depending on the position of the optometry device 100 with respect to the eyeball of the subject and the line-of-sight direction of the subject.

An example is shown below. FIG. 5 is a first diagram showing an example of a fundus image visually recognized by a subject.

In the example of FIG. 5A, the projected fundus image 502 is deviated (eccentric) from the center in the field of view 501 of the subject, and a part of the projected fundus image 502 is missing.

In the present embodiment, the subject visually recognizes the fundus image 502, and the optometry device 100 is moved up, down, left, right, front and back so as to be located in the center of the visual field, and as shown in FIG. 5 (B), the fundus. By manipulating the operating member 108 or 109 while the image 502 is located substantially in the center of the field of view, an appropriate fundus image will be captured.

That is, according to the optometry device 100 of the present embodiment, the subject can adjust the positional relationship between the projection unit of the optometry device 100 and the eyeball by himself / herself.

For example, in the present embodiment, the subject gradually changes the holding method, angle, etc. of the optometry device 100 while looking at his / her own fundus image, and the visible fundus image is located substantially in the center of the visual field. Occasionally, the operating member 108 or 109 may be operated.

Therefore, according to the present embodiment, the subject performs the positioning of the optometry device and the subject's eyeball so that the entire fundus image can be seen in the central part of the visual field, and captures the fundus image. , No need for inspectors.

It may be difficult to determine whether the fundus image is in the center of the visual field. Therefore, in the present embodiment, as shown in FIG. 6, an image that serves as a visual index of the fundus image may be superimposed on the periphery of the fundus image captured by the optometry device 100 and projected onto the retina of the subject.

FIG. 6 is a second diagram showing an example of a fundus image visually recognized by the subject. In the present embodiment, an image showing the visual recognition index J is superimposed around the fundus image 502. For example, four indexes J may be provided around the fundus image 502.

By adjusting the position of the optometry device 100 so that the four indexes J can be visually recognized equally, the subject can visually recognize the fundus image 502 projected by the optometry device 100 in the central portion of the visual field. ..

The visual acuity in the peripheral part of the visual field is lower than the visual acuity in the central part. In FIG. 6, this is used. That is, the fact that the four indexes J cannot be visually recognized equally means that the four indexes J do not exist within a certain range from the central portion of the visual field, and the fundus image 502 is displayed. Indicates that it is not located in the central part of the field of view.

On the other hand, as shown in FIG. 6B, when the four indexes J can be visually recognized equally, the four indexes J exist within a certain range from the central portion of the visual field, and the fundus image 502. Indicates that is located in the central part of the field of view.

Further, the optometry device 100 of the present embodiment has a size that can be carried by the subject, and the case 105 covers the view of the subject by allowing the subject to look into the hole 103. Therefore, the subject can take an appropriate fundus image at any place. That is, by using the optometry device 100 of the present embodiment, the subject can easily take an image of his / her fundus at any place such as a home, a workplace, a waiting room of a hospital, or the like.

The fundus image data showing the fundus image may be transmitted to a terminal or the like used by a doctor via the Internet or the like, for example, in order to receive a remote diagnosis.

As described above, according to the present embodiment, by projecting the fundus image captured by scanning the invisible light onto the retina with visible light, the subject can determine whether the captured fundus image is appropriate. By making a judgment by oneself and having the subject adjust the projected position, the subject can be made to take an appropriate fundus image.

Next, with reference to FIG. 7, the function of the control unit 30 of the present embodiment will be described. FIG. 4 is a diagram illustrating a function of the control unit of the first embodiment.

The control unit 30 of the present embodiment is, for example, an arithmetic processing unit such as a CPU (Central Processing Unit).

The control unit 30 of the present embodiment includes an infrared light control unit 131, an image data acquisition unit 132, a projection control unit 133, and an operation reception unit 134.

The infrared light control unit 131 controls the infrared optical optical system 15. Specifically, the infrared light control unit 131 controls the scanning unit 22 of the infrared optical optical system 15 to scan the retina of the subject with the infrared laser light Lb. Further, the infrared light control unit 131 causes the storage unit 34 to hold the fundus image data generated by the image generation unit 33 from the reflected wave of the infrared laser light Lb scanned by the infrared optical optical system 15.

When the operation reception unit 134 receives an operation on the operation member 108 or 109, the image data acquisition unit 132 acquires the fundus image data held in the storage unit 34 as an inspection result.

In other words, the image data acquisition unit 132 captures the fundus image data held in the storage unit 34 at the time when the operation member 108 or 109 is operated, and captures it as the inspection result image data. The inspection result image data may be held by the image data acquisition unit 132, or may be stored as inspection result image data in the storage unit 34.

The projection control unit 133 scans the scanning unit 20 of the image projection optical system 14 based on the fundus image data held in the storage unit 34, and projects the fundus image onto the retina of the subject.

The operation reception unit 134 detects that an operation has been performed on the operation member 108 or 109. Specifically, the operation members 108 and 109 may be, for example, a shutter button, and the operation reception unit 134 detects that the shutter button has been pressed. That is, the operation members 108 and 109 of the present embodiment are operation units 41 that instruct the timing of capturing the fundus image.

Next, the operation of the optometry device 100 of the present embodiment will be described with reference to FIG. FIG. 8 is a flowchart illustrating the operation of the optometry apparatus of the first embodiment.

In the eye examination device 100 of the present embodiment, the invisible light 50b irradiated from the light source 11 and dispersed by the spectroscopic unit 13 is scanned by the scanning unit 22 and irradiated to the retina 74, and the invisible light reflected by the retina 74 is detected by the detector. It is detected by 40, and the fundus image data of the retina is generated by the image generation unit 33 (step S801).

Subsequently, the optometry device 100 temporarily holds the fundus image data generated by the image generation unit 33 in the storage unit 34 (step S802). The fundus image data held in the storage unit 34 may be overwritten each time the image generation unit 33 acquires new fundus image data.

Subsequently, the optometry device 100 reads out the fundus image data held in the storage unit 34 by the control unit 30, controls the image projection optical system 14, and projects the fundus image onto the retina of the subject (the subject's retina). Step S803). That is, in step S803, the subject is made to visually recognize the fundus image showing the current state of the fundus.

Next, the optometry device 100 determines whether or not the operation of the operation member 108 or 109 has been accepted by the operation reception unit 134 of the control unit 30 (step S804). Specifically, the optometry device 100 determines whether or not the shutter has been pressed.

If the shutter button is not pressed in step S804, the optometry device 100 returns to step S801.

When the shutter button is pressed in step S804, the optometry device 100 acquires the fundus image data stored in the storage unit 34 when the shutter button is pressed by the image data acquisition unit 132 of the control unit 30. (Step S805). That is, the fundus image data acquired here is image data that captures the fundus image projected on the retina of the subject when the shutter button is pressed.

Subsequently, the optometry apparatus 100 stores the fundus image data acquired by the image data acquisition unit 132 in the storage unit 34 as the examination result of the subject (step S806), and ends the process. The image data acquisition unit 132 associates the acquired fundus image data with a device ID or the like previously assigned to the optometry device 100 in order to identify the optometry device 100, and stores the data in the storage unit 34. This fundus image data may be used as an inspection result.

Further, in the present embodiment, the fundus image data temporarily held in the storage unit 34 when the shutter button is pressed may not be overwritten as it is, and may be used as an inspection result.

As described above, in the present embodiment, the subject adjusts the positional relationship between the optometry device 100 and his / her eyeball while visually recognizing his / her own fundus image, and the image quality of the fundus image is appropriate depending on the subject. When the judgment is made, the shutter button is operated and the fundus image data as the examination result is acquired.

Therefore, according to the present embodiment, the assistance of a third party (inspector or the like) for capturing the fundus image is not required, and the subject himself / herself can capture the fundus image having an appropriate image quality.

Further, the optometry device 100 of the present embodiment has a communication function of communicating with a device connected to the outside, and the fundus image data acquired as an inspection result may be output to the external device. Further, the optometry device 100 of the present embodiment has, for example, a function of connecting to a network for communication, and the fundus image data acquired as an inspection result is collected together with the device ID of the optometry device 100 as a terminal of a medical institution. You may send it to etc.

Further, in the optometry device 100 of the present embodiment, a user ID or the like that identifies the user of the optometry device 100 may be stored in advance, and the fundus image data acquired as the inspection result corresponds to the user ID. It may be attached and transmitted to an external device such as a terminal of a medical institution.

In this embodiment, for example, in step S801 of FIG. 8, a sample of the fundus image may be projected on the retina of the subject before the acquisition of the fundus image data of the subject is started. The sample of the fundus image is a fundus image of the image quality required for diagnosis.

In this way, by making the subject visually recognize the sample of the fundus image in advance, when the subject himself / herself captures the fundus image, he / she can grasp the image quality of the image. Can be made to. The image data showing the sample of the fundus image may be stored in the storage unit 34 or the like in advance.

(Second embodiment)
The second embodiment will be described below with reference to the drawings. In the second embodiment, two holes corresponding to the left and right eyes are formed on the front panel, and two infrared optical optical systems 15 and two image projection optical systems 14 are provided corresponding to the respective holes. This is different from the first embodiment. Therefore, in the following description of the second embodiment, the differences from the first embodiment will be described, and for those having the same functional configuration as the first embodiment, the description of the first embodiment will be described. A code similar to the code used is assigned, and the description thereof will be omitted.

FIG. 9 is a diagram illustrating the appearance of the optometry apparatus of the second embodiment. 9 (A) is a front view of the optometry device, FIG. 9 (B) is a perspective view of the optometry device from the front side, and FIG. 9 (C) is a view of the optometry device from the back side. It is a perspective view.

The optometry device 100A of the present embodiment has a housing 101A and a front panel 102A. A hole 103L and a hole 103R corresponding to the left and right eyes of the subject are formed on the front panel 102A, and a projection portion 10 corresponding to the hole 103L and a hole 103R correspond to the inside of the housing 101A. The projection unit 10 to be used is stored.

That is, the optometry device 100A of the present embodiment has two projection units 10 corresponding to the left and right eyes of the subject.

The housing 101A of the present embodiment is formed of a back panel 104 and a case 105A. The case 105A has flat surface portions 105a1 and 105b and circumferential surface portions 105c and 105d.

In the case 105A of the present embodiment, the dent 106 is not formed in the flat surface portion 105a1, and the dent 107 is formed only in the flat surface portion 105b.

Further, in the case 105A of the present embodiment, the operation member 108L, the operation member 108R, and the slide switch SW are formed on the flat surface portion 105a1.

The operating member 108L is formed at a position corresponding to the hole 103L, and the operating member 108R is formed at a position corresponding to the hole 103R. That is, in the present embodiment, when the subject wears the optometry device 100A so that the flat surface portion 105a1 faces the upper surface, the operation member 108L is arranged on the left eye side of the subject and the right eye side of the subject. The operation member 108R will be arranged in.

In the example of FIG. 9, the slide switch SW is formed on the flat surface portion 105a1, but the present invention is not limited to this, and the slide switch SW may be formed at any position in the case 105.

The slide switch SW is a switch for selecting the projection unit 10 to be driven from the two projection units 10 housed in the housing 101A.

For example, when the slide switch SW is turned on on the operation member 108L side, the projection unit 10 corresponding to the hole 103L is driven, and the laser beam is irradiated from the hole 103L. That is, in this case, the optometry apparatus 100A captures the fundus image of the left eye of the subject or projects the fundus image of the left eye of the subject.

Further, for example, when the slide switch SW is turned on on the operation member 108R side, the projection unit 10 corresponding to the hole 103R is driven, and the laser beam is irradiated from the hole 103R. That is, in this case, the optometry device 100A captures the fundus image of the right eye of the subject or projects the fundus image of the right eye of the subject.

As described above, in the present embodiment, it is possible to select whether to capture the fundus image of the left or right eye of the subject and to project the fundus image to which eye of the subject.

Next, the optometry device 100A of the present embodiment will be described with reference to FIG. 10. FIG. 10 is a block diagram of the optometry device of the second embodiment.

The optometry device 100A of the present embodiment includes a projection unit 10L, a projection unit 10R, a detector 40L, a detector 40R, a control unit 30A, and an operation unit 41.

The projection unit 10L of the present embodiment outputs the laser light emitted from the hole 103L of the front panel 102A, and the projection unit 10R outputs the laser light emitted from the hole 103R of the front panel 102A.

The projection unit 10L includes a light source 11L, an adjustment unit 12L, a spectroscope 13L, an image projection optical system 14L, an infrared optical optical system 15L, a drive circuit 16L, and an input circuit 17L. The projection unit 10R includes a light source 11R, an adjustment unit 12R, a spectroscope 13R, an image projection optical system 14R, an infrared optical optical system 15R, a drive circuit 16R, and an input circuit 17R. Since each part of the projection parts 10L and 10R is the same as that of the first embodiment, the description thereof will be omitted.

The detector 40L scans the infrared laser light Lb by the infrared optical optical system 15L, irradiates the subject's eye 70, and detects the reflected wave. The detector 40R scans the infrared laser beam Lb by the infrared optical optical system 15R, irradiates the eye 70 of the subject, and detects the reflected wave.

The control unit 30A controls the projection unit 10L or the projection unit 10R according to the operation of the subject.

In the example of FIG. 10, each of the projection units 10L and 10R has a light source 11L and 11R, respectively, but the present invention is not limited to this. The light source may be common to the projection unit 10L and the projection unit 10R.

Hereinafter, the function of the control unit 30A of the present embodiment will be described with reference to FIG. FIG. 11 is a diagram illustrating the function of the control unit of the second embodiment.

The control unit 30A of the present embodiment includes an infrared light control unit 131A, an image data acquisition unit 132, a projection control unit 133A, an operation reception unit 134A, and a selection unit 135.

The infrared light control unit 131A controls the scanning unit 22 of either the infrared optical optical system 15L or the infrared optical optical system 15R according to the operation received by the operation reception unit 134A.

The projection control unit 133A controls the scanning unit 20 of either the image projection optical system 14L or the image projection optical system 14R according to the operation received by the operation reception unit 134A.

The operation receiving unit 134A receives an operation on the slide switch SW and an operation on the operating members 108L and 108R.

The selection unit 135 selects a projection unit to be driven according to the operation of the slide switch SW. Specifically, the selection unit 135 selects and drives the projection unit 10L when the slide switch SW is turned on on the operating member 108L side, and when the slide switch SW is turned on on the operating member 108R side, the selection unit 135 selects and drives the projection unit 10L. The projection unit 10R is selected and driven.

Next, the operation of the optometry device 100A of the present embodiment will be described with reference to FIG. 12. FIG. 12 is a flowchart illustrating the operation of the optometry apparatus of the second embodiment.

In the optometry device 100A, the operation receiving unit 134A accepts the selection of either left or right by operating the slide switch SW by the subject (step S1201). In the following description, it is assumed that the slide switch SW is turned on on the left side.

Subsequently, the optometry device 100A drives the selected projection unit 10L by the selection unit 135, scans the retina of the subject's left eye with invisible light by the infrared optical optical system 15L, and detects the detector 40L. The reflected light is detected by the image generation unit 33, and the fundus image data is generated by the image generation unit 33 (step S1202).

Subsequently, the optometry device 100A temporarily holds the fundus image data generated by the image generation unit 33 in the storage unit 34 (step S1203).

Subsequently, the optometry device 100A reads out the fundus image data held in the storage unit 34 by the control unit 30A, controls the image projection optical system 14L of the selected projection unit 10L, and covers the fundus image. It is projected onto the retina of the examiner's left eye (step S1204). That is, in step S1204, the subject is made to visually recognize the fundus image showing the current state of the fundus of the left eye.

Since the processing of steps S1205 to S1207 of FIG. 12 is the same as the processing of steps S804 to S806 of FIG. 8, the description thereof will be omitted.

As described above, according to the present embodiment, the subject can capture the fundus image of the selected eye among the left and right eyes without turning the eye examination device 100A upside down.

Further, in the optometry device 100A of the present embodiment, for example, after acquiring the fundus image data of one of the left and right eyes, the fundus image based on the acquired fundus image data is projected on the retina of the other eye. You can also do it.

For example, there may be a case where the retina of the subject's left eye has some kind of disease, and even if the fundus image of the left eye is projected onto the retina of the left eye, the subject cannot visually recognize the fundus image. In such a case, by projecting the fundus image of the left eye onto the retina of the right eye, the subject can visually recognize the fundus image of his / her left eye with the right eye.

In the optometry device 100A of the present embodiment, the projection unit of either the projection unit 10L or the projection unit 10R acquires the fundus image data of one of the left and right eyes of the subject, and the other projection unit covers the image. The image indicated by the fundus image data may be projected on the other eye of the examiner.

Hereinafter, the operation of the optometry device 100A will be described with reference to FIG. 13 when the eye that captures the fundus image and the eye that projects the fundus image are different.

FIG. 13 is a flowchart illustrating another operation of the optometry apparatus of the second embodiment.

Since the processing from step S1301 to step S1303 in FIG. 13 is the same as the processing from step S1201 to step S1203 in FIG. 12, the description thereof will be omitted.

In step S1303, when the fundus image data is held in the storage unit 34, the optometry device 100A determines whether or not the operation reception unit 134A of the control unit 30A has accepted the selection of the side to project the fundus image (step). S1304). If the selection is not accepted in step S1304, the optometry device 100A returns to step S1302.

When the selection is accepted in step S1304, the optometry apparatus 100A uses the selection unit 135 to display the fundus image based on the fundus image data held in the storage unit 34 by the image projection optical system of the selected projection unit. It is projected (step S1305).

Specifically, when the control unit 30A receives the operation selected by the operation reception unit 134, the selection unit 135 selects the projection unit 110L or the projection unit 110R on the side corresponding to the operation. Then, the control unit 30A controls the scanning unit 20 of the image projection optical system 14 possessed by the selected projection unit by the fundus image data held in the storage unit 34, and examines the fundus image indicated by the fundus image data. It is projected onto the person's retina.

Next, the optometry device 100A determines whether or not the operation of the operation member 108L or 108R has been accepted by the operation reception unit 134A of the control unit 30A (step S1306). Specifically, the optometry device 100A determines whether or not the shutter has been pressed.

If the shutter button is not pressed in step S1306, the optometry device 100A returns to step S1301.

In step S1106, the processing of step S1307 and step S1308 when the shutter button is pressed is the same as that of step S805 and step S806 of FIG. 8, so the description thereof will be omitted.

Thus, in the present embodiment, the fundus image of one eye of the subject can be projected onto the retina of the other eye. Therefore, according to the present embodiment, for example, even when there is some disease in one eye, the subject can appropriately image the fundus image on the side with the disease.

In the example of FIG. 13, the process of selecting the side for capturing the fundus image and then selecting the side for projecting is not limited to this. In the present embodiment, the side for capturing the fundus image and the side for projecting the fundus image may be selected in advance, and the acquisition of the fundus image data and the projection of the fundus image may be performed in parallel.

Although the present invention has been described above based on each embodiment, the present invention is not limited to the requirements shown here, such as the configuration described in the above embodiment and the combination with other elements. With respect to these points, the gist of the present invention can be changed without impairing the gist of the present invention, and can be appropriately determined according to the application form thereof.

10, 10L, 10R Projection unit 11 Light source 12 Adjustment unit 13 Spectroscopy unit 14 Image projection optical system 15 Infrared optical optical system 16 Drive circuit 17 Input circuit 30, 30A Control unit 40, 40L, 40R Detector 41 Operation unit 100, 100A Optometry device 101 Housing 102 Front panel 103 Hole 104 Back panel 105 Case 108, 109 Operation member

Claims (9)

A light source that emits visible and invisible light,
An invisible light projection unit that scans the invisible light and irradiates the subject's retina with the invisible light.
A detection unit that detects the reflected light of the invisible light from the retina,
An image generation unit that generates image data showing a fundus image of the subject from the reflected light detected by the detection unit, and an image generation unit.
A storage unit that holds the image data generated by the image generation unit, and a storage unit.
An optometry device comprising a visible light projection unit that scans the visible light based on the image data and projects the fundus image of the subject onto the retina of the subject by the visible light. The visible light projection unit is
The optometry device according to claim 1, wherein an image of a visual recognition index is projected around the fundus image of the subject . An operation unit that instructs the capture of the image data, and
The optometry device according to claim 1 or 2, further comprising an image data acquisition unit that captures the image data held in the storage unit and acquires it as inspection result image data at the timing when the operation unit is operated. The invisible light projection unit irradiates either one of the left and right eyes of the subject with the invisible light.
The visible light projection unit irradiates the visible light to the retina of the eye on the side of the left and right eyes of the subject to which the invisible light is irradiated, according to any one of claims 1 to 3. The optometry device described. Any one of claims 1 to 4, wherein the invisible light projection unit and the visible light projection unit are provided one by one so as to correspond to either one of the left and right eyes of the subject. The optometry device according to paragraph 1. A control unit that controls the invisible light projection unit and the visible light projection unit,
It has a switch for selecting one of the left and right eyes of the subject.
The invisible light projection unit includes a first invisible light projection unit and a second invisible light projection unit corresponding to each of the left and right eyes of the subject.
The visible light projection unit includes a first visible light projection unit and a second visible light projection unit corresponding to each of the left and right eyes of the subject.
The control unit
The subject's retina is scanned by either the first invisible light projection unit or the second invisible light projection unit according to the selection by the switch.
One of claims 1 to 4, wherein the retina of the subject is scanned by either the first visible light projection unit or the second visible light projection unit according to the selection by the switch. The optometry device described in. The control unit
Depending on the selection by the switch,
Of the left and right eyes of the subject, the eye that acquires the image data of the fundus image of the subject and the eye that irradiates the visible light to project the fundus image of the subject onto the retina. The eye examination device according to claim 6, which is different from the eyes. It has an optical system that irradiates the invisible light and the visible light on the retina of the subject.
The optometry apparatus according to any one of claims 1 to 7, wherein the optical system is shared by the invisible light projection unit and the visible light projection unit. It is an optometry method using an optometry device.
A light source emits visible and invisible light,
The invisible light is scanned by the invisible light projection unit to irradiate the subject's retina with the invisible light.
The detection unit detects the reflected light of the invisible light from the retina,
The image generation unit generates image data showing the fundus image of the subject from the reflected light detected by the detection unit.
The image data generated by the image generation unit is stored in the storage unit.
An optometry method in which the visible light is scanned by a visible light projection unit based on the image data, and an image of the fundus of the subject is projected onto the retina of the subject by the visible light.

Images