Ophthalmic device and control method for ophthalmic device

Abstract

To improve usability of an ophthalmologic apparatus.SOLUTION: An ophthalmologic apparatus includes: an examination unit for executing an examination of an eye to be examined; driving means for driving the examination unit; and control means that starts control, according to a predetermined condition, of the examination unit and the driving means based on a plurality of different examination protocols which defines a series of control procedures for executing a plurality of examinations including alignment adjustment for aligning the examination unit with respect to the eye to be examined. The control means causes display means to display results of the plurality of examinations and display information for receiving a re-examination instruction for only parts of the plurality of examinations.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The disclosed technology relates to an ophthalmic device and a control method for an ophthalmic device.

Background Art

[0002] As ophthalmic devices, there are devices for acquiring a two-dimensional image of the fundus of an eye to be examined (hereinafter referred to as a fundus camera device), and devices for acquiring a tomographic image of an eye to be examined by using optical coherence tomography (OCT) with low coherence light (hereinafter referred to as an OCT device), which have been put into practical use.

[0003] These devices perform imaging after performing alignment adjustment between the device and the eye to be examined and necessary adjustments. In recent years, ophthalmic devices having an auto function for automatically performing these adjustments have been developed. By using the auto function, a user can easily perform imaging of an eye to be examined using an ophthalmic device without performing complicated adjustment operations.

[0004] Patent Document 1 discloses an optical image measurement device having a function of acquiring a tomographic image and a fundus image of the fundus. Further, the optical image measurement device disclosed in Patent Document 1 has a function of automating operations during imaging such as automatic imaging and autofocus. In the optical image measurement device disclosed in Patent Document 1, an arbitrary scanning mode is预先 selected from a plurality of scanning modes of signal light for scanning the fundus. Thereafter, when the function of automating operations during imaging is turned on, acquisition of a tomographic image of the fundus and acquisition of a fundus image based on the selected scanning mode are automatically performed.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In this case, the optical image measuring device disclosed in Patent Document 1 terminated its operation after storing the acquired interference image and color fundus image. Therefore, even if, for example, only a part of a series of shots needed to be redone, the user had to return to the step of specifying the shooting conditions, specify the same conditions again, and then repeat the same operation from the beginning, resulting in reduced usability.

[0007] One of the disclosure technologies aims to improve the usability of ophthalmic devices.

[0008] Furthermore, in addition to the aforementioned objectives, it is also possible to consider the effects and benefits derived from each configuration shown in the embodiments for carrying out the invention described later, which cannot be obtained by conventional art, as another objective of this invention. [Means for solving the problem]

[0009] One of the ophthalmic devices disclosed is, An examination unit that performs the examination of the eye being examined, A driving means for driving the inspection unit, A selection means for selecting one of several different examination protocols, according to user instructions, from among several examination protocols, each defined with a series of control procedures for performing multiple examinations, including alignment adjustments to align the examination unit with the eye being examined. The selected Taken The system includes control means for initiating control of the inspection unit and the drive means based on an inspection protocol, according to predetermined conditions, The control means is After starting the control of the inspection unit and the drive means according to the predetermined conditions, the inspection unit and the drive means are controlled to automatically and continuously perform the plurality of inspections, including inspections with different imaging methods. The display means displays the results of the aforementioned multiple tests and display information that accepts instructions for retesting at least one of the aforementioned multiple tests. [Effects of the Invention]

[0010] According to one of the disclosed technologies, the usability of ophthalmic devices can be improved.

Brief Description of Drawings

[0011] [Figure 1] Shows a schematic configuration example of the apparatus in Example 1 etc. [Figure 2] Shows a schematic configuration example of the control unit of the apparatus in Example 1 etc. [Figure 3] Shows an example of the measurement flowchart in Example 1. [Figure 4] Shows an example of the shooting screen in Example 1. [Figure 5] Shows an example of the result screen in Example 1. [Figure 6(a)] Shows an example of the result screen composed of multiple screens in Example 1. [Figure 6(b)] Shows another example of the result screen composed of multiple screens in Example 1. [Figure 7] Shows an example of the result screen in Example 1. [Figure 8(a)] Shows an example of the decision screen in Example 1. [Figure 8(b)] Shows an example of the decision screen in Example 1. [Figure 9] Shows an example of the measurement flowchart in Example 2. [Figure 10] Shows an example of the shooting screen in Example 2. [Figure 11] (a) is a diagram showing an example of the acquired image of the anterior eye image in Example 1 etc., and (b) is a diagram showing an example of the converted image of the anterior eye image in Example 1 etc. [Figure 12] (a) to (d) are diagrams showing an example of the screen display in Example 3. [Figure 13] Is a diagram showing an example of the inspection protocol in Example 3. [Figure 14] Is a diagram showing an example of the first standby operation flowchart in Example 3. [Figure 15] Is a diagram showing an example of the second standby operation flowchart in Example 4. [Figure 16] Is a diagram showing an example of the output screen of the modification example. [Figure 17] Is a diagram showing an example of the output screen of the modification example. [Modes for carrying out the invention]

[0012] Hereinafter, exemplary embodiments for carrying out the disclosed technology will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, and relative positions of components described in the following embodiments are arbitrary and can be modified depending on the configuration of the apparatus to which the disclosed technology is applied or various conditions. In addition, the same reference numerals will be used between drawings to indicate elements that are identical or functionally similar.

[0013] (Example 1) In this embodiment, an ophthalmic device that performs both OCT imaging and visible light fundus imaging will be described as an example of an ophthalmic device using the disclosed technology. Conventional optical imaging devices would terminate their operation after storing the acquired interference images and color fundus images. Therefore, for example, if the user wanted to repeat imaging under the same conditions after performing a series of imaging, or to repeat only a part of a series of imaging, they would have to return to the step of specifying the imaging conditions, specify the same conditions again, and then repeat the same operation from the beginning, resulting in reduced usability. Therefore, this embodiment aims to improve the usability of an ophthalmic device. The ophthalmic device according to this embodiment stores an examination protocol that defines a series of control procedures including both OCT imaging and visible light fundus imaging, and the user can select and execute one of several examination protocols.

[0014] The ophthalmic device according to this embodiment displays a fundus image acquired by fundus photography, an OCT image acquired by OCT photography, and a capture button, which is an example of display information that accepts instructions to perform at least one of fundus photography and OCT photography, on the display means. When the capture button is operated, the ophthalmic device according to this embodiment performs the instructed examination under the same conditions as the examination defined in the selected examination protocol, without displaying a screen that is shown when prompting the user to select an examination protocol.

[0015] Furthermore, the ophthalmology system in this embodiment may be configured such that an ophthalmology device (combined examination unit) based on the disclosed technology is connected to a network, receives orders (examination instructions) from a doctor's PC, performs examinations of the eye to be examined according to the order, and transmits the results to the doctor's PC.

[0016] <Device Configuration> The ophthalmic apparatus used in this embodiment comprises a fundus imaging unit that captures two-dimensional fundus images, and an OCT imaging unit that acquires a tomographic image of the eye using combined light (interference light) obtained by combining the reflected light from the eye irradiated with measurement light and a reference light. As an example of a fundus imaging unit, a configuration using a fundus camera that illuminates the fundus with visible light and captures a color image will be described, but a color SLO (Scanning Loom) that scans the fundus with visible light to obtain a color fundus image may also be used.

[0017] Here, a single examination is described as the sequence of adjustments required for imaging and the subsequent imaging. Information defining the sequence of multiple consecutive examinations is described as an examination protocol. Furthermore, the actions performed during the examination may be measurements of ocular characteristics instead of imaging. Examples of measurements include intraocular pressure, axial length, refractive power, corneal curvature, pupil diameter, wavefront aberration, and retinal thickness measurement using OCT.

[0018] The term "protocol" is generally used to mean rituals, procedures, or rules, and in the field of communications, it specifically refers to rules that define information formats and communication procedures. Here, an inspection protocol is described as information that defines the procedure for performing an inspection multiple times. Furthermore, an inspection protocol may also define both inspection conditions and inspection procedures. The shooting conditions, which are the conditions for taking images as part of the inspection, are, for example, the scanning pattern, scanning range, and scanning area.

[0019] With reference to Figure 1, which shows the schematic configuration and optical system of the ophthalmic apparatus of this embodiment, Example 1 will be described below.

[0020] In the following explanation, the direction that approximately coincides with the line of sight of the eye E under examination will be defined as the Z direction. Furthermore, the plane perpendicular to the Z direction will be defined as the XY plane, with the horizontal direction as the X direction and the vertical direction as the Y direction.

[0021] The ophthalmic device includes an optical head unit 100, a spectrometer 200, which is an example of an examination unit, and a control unit 300, which is an example of a control means. While the description will focus on a configuration in which these components are located inside the ophthalmic device, the control unit 300 and the spectrometer 200 may be located outside the main body of the ophthalmic device. Furthermore, a portion of the optical head unit 100 may be located outside the ophthalmic device. The configurations of the optical head unit 100, the spectrometer 200, and the control unit 300 will be described in order below.

[0022] <Configuration of the optical head unit 100 and the spectrometer 200> An example of an examination unit, the optical head unit 100, consists of a measurement optical system for capturing two-dimensional fundus images and three-dimensional tomographic images (OCT images) of the anterior segment Ea of the eye under examination E and the fundus Ef of the eye under examination. The various optical systems arranged within the optical head unit 100 will be described below.

[0023] In the optical head unit 100, an objective lens 101 is positioned facing the eye E under examination. A first dichroic mirror 102, which functions as an optical path separator, is positioned on the optical axis L1 of the objective lens 101. The first dichroic mirror 102 branches the optical path of the fundus imaging system (optical axis L3) and the optical path of the OCT interference system (optical axis L5) according to their wavelength bands.

[0024] On the optical axis L3 in the transmission direction of the first dichroic mirror 102, a perforated mirror 131, a photographic aperture 132, a focus lens 133 and an imaging lens 134, a third dichroic mirror 135, and an image sensor 136 are arranged. The perforated mirror 131 has an opening in the center. The focus lens 133 adjusts the focus by moving its position on the optical axis L3. The optical path on the optical axis L3 is branched by the third dichroic mirror 135 into an optical path leading to the image sensor 136 and an optical path leading to the fixation lamp 137, depending on the wavelength band. The image sensor 136 is a fundus image sensor that is sensitive to visible light and infrared light and is capable of both video observation and still image capture. The fixation lamp 137 generates visible light to encourage the subject to fixate.

[0025] On the optical axis L4 in the reflection direction of the perforated mirror 131, the corneal baffle 140, relay lens 141, focus indicator unit 142, lens 143, and ring slit 144 are arranged in this order. The corneal baffle 140 has a light-shielding point in the center. The ring slit 144 has a ring-shaped slit opening. Also on the optical axis L4, a crystalline lens baffle 145 as a light-shielding member having a light-shielding point, and a second dichroic mirror 146 having the property of transmitting infrared light and reflecting visible light are arranged. The focus indicator unit 142 is movable along the optical axis L4 and can be inserted into and removed from the optical axis L4.

[0026] A condenser lens 147 and a white LED light source 148 are positioned in the reflection direction of the second dichroic mirror 146. The white LED light source 148 is a light source for imaging, consisting of multiple white LEDs that emit visible pulsed light. A condenser lens 149 and an infrared LED light source 150 are positioned in the transmission direction of the second dichroic mirror 146. The infrared LED light source 150 is a light source for observation, consisting of multiple infrared LEDs that emit steady infrared light. The objective lens 101, the second dichroic mirror 146, the optical elements between them, and the condenser lenses 147 and 149 constitute an illumination optical system for illuminating the fundus of the eye. Light from the white LED light source 148 or the infrared LED light source 150 illuminates the fundus of the eye being examined through this illumination optical system.

[0027] Lens 151, mirror 152, OCTX scanner 153-1, OCTY scanner 153-2, and lenses 154 and 155 are arranged on the optical axis L5 in the reflection direction of the first dichroic mirror 102. The OCTX scanner 153-1 and OCTY scanner 153-2 are composed of mirrors, for example, and function as scanning units that scan the measurement light over the fundus Ef of the eye under examination. Furthermore, the OCTX scanner 153-1 and OCTY scanner 153-2 are positioned such that their central positions are near the focal point of lens 151. This central position is also optically conjugate to the position of the pupil of the eye under examination E. With this configuration, the optical path with the scanning unit as the object point is approximately parallel between the objective lens 101 and lens 151. This makes it possible to ensure that the angle of incidence of the measurement light entering the dichroic mirror positioned between the OCTX scanner 153-1 and the OCTY scanner 153-2 is the same, even when scanning the fundus Ef with the measurement light. The OCTX scanner 153-1 and the OCTY scanner 153-2 scan the measurement light in a main scanning direction and a sub-scanning direction perpendicular to it, respectively, but the scanning directions are not limited to these.

[0028] The measurement light source 157 is a light source that emits light to obtain measurement light to be incident on the measurement optical path. In this embodiment, the measurement light in the OCT optical system is emitted from the fiber end as the light source, and the fiber end has an optically conjugate relationship with the fundus Er of the eye under examination E. Lens 154 is a lens for focusing and is driven in the optical axis direction indicated by the arrow in the figure by a motor (not shown). Focusing of the measurement light is performed so that the measurement light emitted from the fiber end acting as the light source is imaged onto the fundus Er. Lens 154, which functions as a focus adjustment unit, is positioned between the fiber end, which is the measurement light source, and the OCTX scanner 153-1 and OCTY scanner 153-2, which function as scanning units. With the focus adjustment described above, the image of the measurement light emitted from the fiber end can be imaged onto the fundus Er of the eye under examination E, and the light returned from the fundus Er can be efficiently returned to the optical fiber 156-2.

[0029] In Figure 1, the optical path between the OCTX scanner 153-1 and the OCTY scanner 153-2 is shown as being within the plane of the paper, but in reality, it is configured perpendicular to the plane of the paper.

[0030] Next, the optical path from the measurement light source 157, the reference optical path, and the configuration of the spectrometer 200 will be described. The Michelson interferometer is composed of the measurement light source 157, optical coupler 156, optical fibers 156-1 to 156-4, lens 158, dispersion compensation glass 159, reference mirror 160, and spectrometer 200. Optical fibers 156-1 to 156-4 are single-mode optical fibers connected to and integrated with the optical coupler 156. Light emitted from the measurement light source 157 is guided to the optical coupler 156 via optical fiber 156-1. The light guided to the optical coupler 156 is split into measurement light on the optical fiber 156-2 side and reference light on the optical fiber 156-3 side. The measurement light passes through the optical path of the OCT optical system described above and irradiates the fundus Er of the eye E being observed, and through reflection and scattering by the retina, it reaches the optical coupler 156 again through the same optical path.

[0031] Meanwhile, the reference light reaches the reference mirror 160 via optical fiber 156-3, lens 158, and dispersion compensation glass 159 inserted to match the dispersion of the measurement light and the reference light, and is reflected. The reference light reflected by the reference mirror 160 returns along the same optical path and reaches the optical coupler 156 again. The reference light and the measurement light (return light) that have reached the optical coupler 156 again are combined by the optical coupler 156. Here, when the optical path length of the measurement light and the optical path length of the reference light become approximately the same, interference between the respective lights occurs due to this combination. The reference mirror 160 is held in a position adjustable in the optical axis direction indicated by the arrow in the figure by a motor and drive mechanism (not shown). The optical path length of the reference light can be adjusted to match the optical path length of the measurement light, which varies depending on the eye E under examination, by using this motor, etc. The resulting combined light is led to the spectrometer 200 via optical fiber 156-4.

[0032] The spectrometer 200 includes a lens 201, a diffraction grating 202, a lens 203, and a line sensor 204. The multiplexed light emitted from the optical fiber 156-4 becomes approximately parallel light after passing through the lens 201, is then spectrally separated by the diffraction grating 202, and is imaged onto the line sensor 204 by the lens 203. Each element in the line sensor 204 outputs a signal corresponding to the received light. The control unit 300 samples this signal at a predetermined timing using an image acquisition unit 304 (described later), and generates a tomographic image by performing predetermined signal processing.

[0033] Next, we will describe the area surrounding the measurement light source 157. In this embodiment, the measurement light source 157 uses an SLD (Super Luminescent Diode), which is a typical low-coherent light source. The central wavelength of the light emitted from the measurement light source 157 is 855 nm, and the wavelength bandwidth is approximately 100 nm. Here, the bandwidth is an important parameter because it affects the resolution in the optical axis direction of the obtained tomographic image. In addition, although an SLD was selected as the type of light source here, any light source that emits low-coherent light will suffice, and ASE (Amplified Spontaneous Emission), etc., can also be used. Considering that the measurement light is for the eye, near-infrared light is appropriate for the central wavelength of the measurement light. Also, since the central wavelength affects the lateral resolution of the obtained tomographic image, it is desirable to have as short a wavelength as possible. For both reasons, in this embodiment, we decided to use light with a central wavelength of 855 nm.

[0034] In this embodiment, a Michelson interferometer is used, but a Mach-Zehnder interferometer may also be used. Depending on the difference in light intensity between the measurement light and the reference light, it is preferable to use a Mach-Zehnder interferometer when the difference in light intensity is large, and a Michelson interferometer when the difference in light intensity is relatively small.

[0035] Stereo cameras 180-1 and 180-2, each containing a lens and an image sensor, are positioned on optical axes L6-1 and L6-2, which are different from optical axis L1. Stereo cameras 180-1 and 180-2, which are examples of observation means, are positioned approximately symmetrically with respect to optical axis L1 on the XZ plane tangent to optical axis L1, in order to observe the anterior segment of the eye E, and substantially simultaneously capture stereo images of the anterior segment Ea of the eye E under examination from different directions. Each pixel value acquired by stereo cameras 180-1 and 180-2 is output to a display unit 310, which is an example of a display means, via the control unit 300. The display unit 310 may be a touch panel that allows the user to input instructions by tapping. Here, the action of the user touching the touch panel is called tapping. In addition, an anterior segment observation light source 125, positioned near the objective lens 101, illuminates the anterior segment Ea of the eye E under examination.

[0036] Here, the stereo cameras 180-1 and 180-2 are positioned approximately symmetrically with respect to the optical axis L1 on the XZ plane tangent to the optical axis L1. However, to reduce the effects of vignetting from eyelashes and eyelids, they may be positioned offset in the Y direction. Also, although two stereo cameras 180 are used, three or more may be used.

[0037] Furthermore, the optical head unit 100 includes a head drive unit 170, which is an example of a drive means for driving the examination unit. The head drive unit 170 consists of three motors (not shown) and is configured to allow the optical head unit 100 to move in three dimensions (X, Y, Z) relative to the eye E under examination. This makes it possible to adjust the alignment of the optical head unit 100 with respect to the eye E under examination.

[0038] <Configuration of the control unit 300> Next, with reference to Figure 2, the general configuration of the control unit 300 will be described. The control unit 300 includes an image capture control unit 301, a storage unit 302 which is an example of a storage means, an output control unit 303 which is an example of a notification means, an image acquisition unit 304, and an image processing unit 305.

[0039] The imaging control unit 301 is connected to the memory unit 302, the optical head 100, and the input unit 340. A touch panel that allows the user to input instructions by tapping may be provided, and the display unit 310 may also serve as the input unit 340. When the imaging control unit 301 receives an input signal from the input unit 340, it controls each part of the optical head unit 100 based on the inspection protocol stored in the memory unit 302. The input unit 340 consists of a mouse 307, a keyboard 308, etc.

[0040] The memory unit 302 stores the examination protocol, the generated images of the eye under examination, the image analysis results, the shooting conditions at the time of image acquisition, and information about the eye under examination. The memory unit 302 also stores various programs used to control the device.

[0041] Here, an examination protocol is information that defines a series of control procedures for performing multiple examinations. Here, an adjustment operation including alignment adjustment and imaging are considered as one examination. In addition, multiple examination protocols are pre-stored in the storage unit 302. On an examination protocol selection screen (not shown), the user selects one of the multiple examination protocols and issues an instruction to execute it. The control procedures defined in the examination protocol may include information on imaging conditions such as scanning patterns and scanning areas. Scanning patterns and scanning areas will be described later. Note that the examination protocol may also be a control procedure based on an order received via a network (not shown). In this case, the ophthalmic device may receive order information including patient information, examination mode, and examination area via the network, store it in the storage unit 302, and then transmit the examination result information stored in the storage unit 302 to the requesting PC.

[0042] The image acquisition unit 304 is connected to the storage unit 302, the optical head 100, the spectrometer 200, and the image processing unit 305. Furthermore, the image acquisition unit 304 is connected to the stereo cameras 180-1 and 180-2 in the optical head unit 100, generates an anterior eye image of the eye E under examination, and sends the image to the image processing unit 305. The image acquisition unit 304 is also connected to the image sensor 136 in the optical head unit 100, generates a fundus image of the eye E under examination, and sends the image to the image processing unit 305. In addition, the image acquisition unit 304 is connected to the line sensor 204 in the spectrometer 200, generates a tomographic image of the eye E under examination, and sends the image to the image processing unit 305.

[0043] The image processing unit 305 processes the anterior eye image, fundus image, and tomographic image acquired by the image acquisition unit 304 and sends them to the storage unit 302. The image processing unit 305 also analyzes the anterior eye image, detects the relative position information of the eye E being examined and the optical head 100, and sends it to the storage unit 302.

[0044] The output control unit 303 is connected to a display unit 310, such as a display, which is an example of a display means. The display unit 310 can display the anterior eye image, fundus image, tomographic image, and analysis results of the image processing unit 305 of the eye E under examination. The display unit 310, which is an example of a display means, may be a touch panel that allows user input by touching it. The action of a user touching a touch panel is called tapping. The output control unit 303 is also connected to an audio output unit 350, which is an example of a notification means, and can output the analysis results of the image processing unit 305 and warnings to the user as audio.

[0045] The control unit 300 may have a selection means for selecting one of several inspection protocols according to the user's instructions.

[0046] The control unit 300 described above may be configured as a module executed by a CPU or MPU, or as a circuit that implements a specific function, such as an ASIC. Furthermore, the storage unit 302 can be configured using any storage medium, such as memory or optical disk.

[0047] <How to display pre-eye images> Next, a method for displaying the anterior eye image of the eye E acquired by the stereo cameras 180-1 and 180-2 according to this embodiment will be described.

[0048] Since the stereo cameras 180-1 and 180-2 are positioned on optical axes L6-1 and L6-2, which are different from the optical axis L1, the anterior eye images acquired by the image acquisition unit 304 are distorted horizontally when viewed from the direction of optical axes L6-1 and L6-2 (diagonally to the side).

[0049] The image processing unit 305 performs a projection transformation to convert the distorted anterior eye image into an image that appears as if viewed from the optical axis L1 direction (front) (image transformation means). The transformed coordinates (x', y') of each pixel in the image can be transformed using the original coordinates (x, y) and transformation coefficients (a, b, c, d, e, f, g, h) using equations (1) and (2).

[0050]

number

[0051]

number

[0052] The conversion coefficients (a, b, c, d, e, f, g, h) can be determined if there are four or more corresponding points between the pre- and post-conversion values. These conversion coefficients can be determined during assembly or calibration while the device is running.

[0053] Figure 11(a) shows the anterior eye image acquired with either stereo camera 180-1 or 180-2, and Figure 11(b) shows the converted anterior eye image.

[0054] The image processing unit 305 periodically converts the captured anterior eye image and sends the converted image to the storage unit 302. The output control unit 303 then periodically reads the converted image from the storage unit 302 and displays the converted anterior eye image as a moving image on the display unit 310.

[0055] Here, the anterior eye image to be displayed as a moving image may be at least one of the images acquired by stereo cameras 180-1 and 180-2, or both.

[0056] In Figure 11(a), pupil 320 appears as a roughly oval that is contracted horizontally, making it difficult for the examiner to determine pupil size and other pupillary conditions. On the other hand, in Figure 11(b), pupil 321 appears as a roughly perfect circle, making it easier for the examiner to determine pupil size and other pupillary conditions.

[0057] Furthermore, when the output control unit 303 displays the converted anterior eye image as a moving image on the display unit 310, it superimposes and displays a circular alignment reference mark 322 as shown in Figure 11(b) (alignment reference mark generation means). The position of this alignment reference mark indicates the target alignment position, and the size of the circle indicates the minimum pupil diameter required for the examination.

[0058] As described above, by displaying the anterior eye image as a moving image, the examiner can more easily pause and resume the examination in accordance with the pupillary state during the examination, thereby enabling efficient and stable examination results to be obtained.

[0059] <Method for detecting relative location information> Next, a method for detecting the relative position information of the optical head unit 100 with respect to the eye E under examination, using stereo cameras 180-1 and 180-2 according to this embodiment, will be described.

[0060] The image processing unit 305 analyzes the features of the anterior eye image to calculate the relative positional information (positional displacement) of the subject eye E and the optical head 100 in the X, Y, and Z directions.

[0061] The image processing unit 305 binarizes the anterior eye image at a predetermined threshold and detects the pupil region. The image processing unit 305 then calculates the centroid position of the detected pupil region. The amount of positional displacement in the X and Y directions is calculated from the difference between the calculated centroid position of the pupil region and a predetermined position in the anterior eye image. Here, the images used to calculate the positional displacement in the X and Y directions may be at least one or both of the images acquired by stereo cameras 180-1 and 180-2.

[0062] Furthermore, the image processing unit 305 calculates the difference in the centroid position of the pupil region calculated from the image of stereo camera 180-1 and the image of stereo camera 180-2, respectively. Then, using the difference in centroid position (parallax), the distance between stereo cameras 180-1 and 180-2, and the focal length, the image processing unit 305 calculates the amount and direction of the Z-direction displacement using the principle of triangulation.

[0063] Here, the centroid of the pupillary region was used as a characteristic of the anterior eye image, but the amount of displacement may also be calculated based on the pupillary center position, etc. Alternatively, an indicator may be projected onto the cornea and the amount of displacement may be calculated based on that indicator. Furthermore, a method of observing the anterior segment by inserting a split prism into the observation optical system may also be used.

[0064] <How to perform the adjustment> The adjustment method according to this embodiment will now be described. The ophthalmic device according to this embodiment performs three adjustment operations: alignment adjustment, focus adjustment, and coherence gate adjustment. Note that the adjustment operation is not limited to these three operations, and any adjustment performed for examination purposes is acceptable. For example, operations such as polarization to optimize the output sensitivity of the OCT may also be performed.

[0065] First, we will explain the alignment adjustment method, which is one of the adjustment operations of the optical head unit 100 for the eye E under examination.

[0066] The imaging control unit 301 instructs the head drive unit 170 to move in order to reduce the amount of positional displacement calculated by the image processing unit 305. The head drive unit 170 then drives three motors (not shown) to move the optical head unit 100 in three dimensions (X, Y, Z) relative to the eye E being examined.

[0067] The image processing unit 305 acquires an anterior eye image again after the optical head unit 100 has moved and detects the pupil region. Here, it determines whether the pupil of the eye under examination E has moved within a specified range on a pre-set display screen. If it is determined that the pupil has moved within this specified range, the alignment adjustment is terminated. On the other hand, if the pupil of the eye under examination is not within this specified range, the above process is repeated.

[0068] Alternatively, a split prism may be inserted into the observation optical system, and the amount of misalignment may be calculated based on the split anterior eye image. Alternatively, an alignment index may be projected onto the anterior eye, and the optical head 100 may be moved based on the position where the index is projected. The alignment index may consist of multiple rough and fine indices, and coarse and fine adjustments may be performed in steps. Furthermore, multiple alignment adjustment methods may be combined.

[0069] Next, we will describe one of the adjustment operations in this embodiment, which is the adjustment of focus on the fundus of the eye E being examined.

[0070] The image processing unit 305 acquires a fundus image and calculates the contrast of the acquired fundus image. The shooting control unit 301 moves the focus lens 133 so that the contrast of the fundus image is increased. After the movement of the focus lens 133, the image processing unit 305 acquires a fundus image again and calculates the contrast. If the contrast exceeds a preset standard, the focus adjustment is terminated. On the other hand, if the contrast does not exceed this standard, the above process is repeated.

[0071] The fundus image used for focus adjustment may be an infrared fundus image or an SLO (confocal laser scanning method using a near-infrared light source) image, or any other image obtained using any fundus imaging technique. In addition to contrast, methods such as calculating the overall brightness of the image or converting the image to frequency may also be used.

[0072] Furthermore, different methods may be used for focus adjustment. For example, a sensor that detects the phase difference of the image may be provided, and the optical head unit 100 may be moved based on the phase difference (phase difference autofocus). Alternatively, the pixels for imaging may be configured to have a function to detect the phase. Furthermore, a slit and a split prism may be inserted into the optical path, and the focus lens 133 may be moved so that the divided light beams rejoin. When performing OCT imaging, the brightness and position of the two-dimensional tomographic image (OCT image) acquired by OCT imaging may be detected, and the focus adjustment lens 154 may be moved so that these fall within an appropriate range. Multiple of the above operations may be combined to perform focus adjustment.

[0073] Furthermore, when performing OCT imaging, coherence gate adjustment, which is one of the adjustment operations, is performed. The image processing unit 305 acquires the OCT image and detects the position of the tomographic image. The imaging control unit 301 drives the mirror 160 based on the position of the tomographic image to adjust the optical path length of the reference light. After adjusting the optical path length, the image processing unit 305 acquires the OCT image again and detects the position of the tomographic image. If the tomographic image is within a predetermined area, the coherence gate adjustment is terminated. If the tomographic image is not within this area, the above process is repeated. Note that in coherence gate adjustment, it is not always necessary to change the optical path length of the reference light; for example, the optical path length of the measurement light can be changed by inserting a mirror into the optical path of the measurement light and changing the position of the mirror.

[0074] The adjustment operations described above may be performed in a different order, or they may be performed simultaneously. For example, after the rough adjustment of the alignment is completed, the fine adjustment of the alignment and the focus adjustment may be started at the same time. After the adjustment operations for alignment, focus, and coherence gate are completed, the adjustment operations for alignment, focus, and coherence gate may be performed again as fine adjustments.

[0075] <Operational flow of a series of tests based on the inspection protocol> The operation flow of a series of examinations based on the examination protocol in this embodiment will be explained using Figures 3 and 4. Here, as an example of an examination protocol, we will explain an example in which OCT imaging is performed first, followed by fundus imaging using visible light.

[0076] Prior to taking images, in S101, the selection means for selecting an inspection protocol selects an inspection protocol according to the user's instructions. The selection means for selecting an inspection protocol may also be located in the control unit 300. The inspection protocol selection screen displays multiple inspection protocols pre-stored in the storage unit 302. Each inspection protocol defines a series of control procedures for performing multiple inspections, including alignment adjustments.

[0077] The user may input instructions by tapping on display information that identifies the inspection protocol on an inspection protocol selection screen (not shown) displayed on the display unit 310. When displaying display information that identifies the inspection protocol, the name of the inspection protocol may be displayed. In addition, a shooting icon that is an illustration of the shooting conditions defined in the inspection protocol may be displayed.

[0078] The examination protocol may include information on imaging conditions such as the imaging mode, scanning mode, and left / right eye. Furthermore, the user can pre-set the order and number of times for multiple examinations, and the set order and number of times are stored in the memory unit 302. For example, an examination protocol that performs examinations of both the right and left eyes consecutively can be selected or set. In addition, it is possible to select and set the imaging to be displayed on the display unit 310 when the examination is completed, from examinations other than the final examination in the examination protocol. For example, when executing control based on an examination protocol that performs OCT imaging and fundus imaging, the OCT image can be displayed on the display unit 310 when the OCT imaging is completed, and fundus imaging can be performed subsequently.

[0079] The imaging modes include fundus imaging mode, fundus fluorescence imaging mode, OCT imaging mode, and anterior segment imaging mode. The scanning modes include Macula, Glaucoma, Disc, and OCT angiography (OCTA). Switching scanning modes sets the optimal scanning pattern and fixation position for each mode. OCT scanning patterns include 3D scan, radial scan, cross scan, circle scan, and raster scan.

[0080] Furthermore, in multiple different examination protocols, each examination protocol may include imaging with different scanning modes and other imaging conditions for the same imaging mode. For example, examples of multiple different examination protocols stored in the memory unit 302 include an examination protocol that performs OCT 3D scanning and fundus photography, and an examination protocol that performs OCT radial scanning and fundus photography. In this embodiment, we will describe a case in which 3D scanning is selected from the OCT scanning patterns and fundus photography is performed in conjunction with it.

[0081] Next, in S102, when the system proceeds from the examination protocol selection screen (not shown) to the imaging screen 1000, which is an example of the first screen, the image acquisition unit 304 begins acquiring the anterior eye image. At this time, the display unit 310 shows the anterior eye image 1101, the fundus observation image 1201, and the tomographic image 1301 within the imaging screen 1000 shown in Figure 4. Before the start of imaging, each image is displayed as a moving image.

[0082] When displaying the anterior eye image, correction may be performed so that the anterior segment is viewed from the front rather than from an oblique angle. Also, the anterior eye image to be displayed may be either one or both of the images acquired by stereo cameras 180-1 and 180-2.

[0083] In the first example screen, the capture screen 1000, it is not necessary to display the anterior eye image 1101, the fundus observation image 1201, and the tomographic image 1301 simultaneously. For example, while the user is adjusting the chin rest, only the anterior eye image may be displayed. Until the fundus observation image and the tomographic image are acquired, the window displaying the images may be blacked out or show static.

[0084] Furthermore, the first example screen, the shooting screen 1000, may consist of multiple screens that switch as the chin rest adjustment and adjustment operations progress. For example, only the anterior eye image 1101 may be displayed while the user adjusts the chin rest and while alignment adjustment is performed, and the fundus observation image 1201 and the tomographic image 1301 may be displayed while focus adjustment or coherence gate adjustment is performed.

[0085] In the first example screen, the capture screen 1000, the user taps the Capture button 1003 to initiate control based on the inspection protocol. While the operation of the Capture button 1003, an example of a user instruction, has been described as a predetermined condition for initiating control based on the inspection protocol, the predetermined conditions are not limited to this. For example, control based on the inspection protocol may be initiated based on the output of a non-contact sensor that detects when the subject approaches the device, or a contact sensor that detects when the subject places their chin on the chin rest.

[0086] Next, in S103, alignment adjustment, one of the adjustment operations, is performed. The imaging control unit 301 instructs the head drive unit 170 to reduce the amount of positional displacement calculated by the image processing unit 305. The head drive unit 170 then drives three motors (not shown) to move the position of the optical head unit 100 in three dimensions (X, Y, Z) relative to the eye E under examination. At this time, the eye E under examination is illuminated by infrared light from the illumination light source 125. Once the alignment adjustment is complete, the final alignment position is stored in the memory unit 302 for each individual imaging.

[0087] Next, one of the adjustment operations, focus adjustment, is performed. The image processing unit 305 acquires a fundus image and calculates the contrast of the acquired fundus image. The shooting control unit 301 moves the focus lens 133 so that the contrast of the fundus image is increased.

[0088] Furthermore, coherence gate adjustment, one of the adjustment operations, is performed. The image processing unit 305 acquires the OCT image and detects the position of the tomographic image. Based on the position of the tomographic image, the imaging control unit 301 drives the mirror 160 to adjust the optical path length of the reference light.

[0089] The adjustment operations of S103 may be performed in a different order, or they may be performed simultaneously. For example, after the rough adjustment of the alignment is completed, the fine adjustment of the alignment and the focus adjustment may be started at the same time. After the adjustment operations for alignment, focus, and coherence gate are completed, the adjustment operations for alignment, focus, and coherence gate may be performed again as fine adjustments.

[0090] In addition to the automatic shooting function described above, there may also be a function for the user to manually adjust the focus and alignment. The user moves the Z-axis position and XY-axis position of the optical head relative to the eye under examination using the slider 1103. They also adjust the focus using the slider 1203 and adjust the coherence gate of the tomographic image 1301 using the slider 1302. They adjust the scanning range displayed on the fundus observation image 1201. Then, they take a picture by pressing the Capture button 1003. When automatic shooting is performed, the Capture button 1003 accepts instructions to perform adjustment operations, but when manual adjustments are made, it accepts instructions to acquire an image. When the Capture button 1003 is tapped, the shooting control unit 301 scans the XY scanners 153-1 and 153-2 to perform a 3D scan.

[0091] Furthermore, the imaging screen 1000 may or may not include a Stop button, which is an example of display information for interrupting control based on the inspection protocol. In addition, a Restart button may or may not include a Restart button, which is an example of display information for resuming control when control based on the inspection protocol is interrupted.

[0092] In the first example screen, the capture screen 1000, it is not necessary to display the anterior eye image 1101, the fundus observation image 1201, and the tomographic image 1301 simultaneously. Furthermore, the capture screen 1000 may consist of multiple screens that switch as the chin rest adjustment and adjustment operations progress. For example, only the anterior eye image 1101 may be displayed while the user adjusts the chin rest and while alignment adjustment is performed, and the fundus observation image 1201 and the tomographic image 1301 may be displayed while focus adjustment or coherence gate adjustment is performed.

[0093] In S104, an image of the eye under examination is captured, and the memory unit 302 stores the image of the eye under examination. The capture may be performed immediately after the aforementioned adjustment operation is completed, or it may be performed after a pre-set countdown time has been performed. There may also be a function that allows the user to select one of these settings. In this embodiment, the case of capturing an image of the eye under examination is described as an example of an examination, but eye characteristics such as refractive power may also be measured.

[0094] After the shooting or measurement is performed in S104, the shooting control unit 301, which is an example of a control means, puts the optical head unit 100, which is an example of an inspection unit, into standby position. The position in which the optical head unit 100 is put into standby position is either the position of the optical head unit 100 when the shooting is completed, or a position moved in the Z direction opposite to the subject side from the position of the optical head unit 100 when the shooting or measurement is completed.

[0095] In this case, the position in which the optical head unit 100 is kept in standby mode does not need to be exactly the same as the position of the optical head unit 100 when the imaging or measurement is completed, in both the X and Y directions. The optical head unit 100 should be kept in standby mode within a certain range so as to shorten the time required for alignment adjustment necessary for the next inspection compared to returning the optical head unit 100 to its initial position without keeping it in standby mode. This control method can be changed by setting, and the optical head may be moved to the initial position of the optical head when the power is turned on after the imaging or measurement is completed.

[0096] By positioning the optical head unit 100 near the final alignment position after the completion of imaging or measurement, it becomes possible to shorten the time required for alignment adjustments to perform the examination instructed from the results screen described later. In addition, to reduce the burden on the subject, the optical head unit 100 may be moved away from the subject.

[0097] Furthermore, when switching between the left and right eyes to proceed to the next examination, the optical head unit 100 may be configured to move in the left-right direction rather than the forward-backward direction as described above. When the right eye is the last to be examined, the time required for alignment adjustment can be shortened by waiting in a position that includes the final position and moves towards the left eye. Conversely, when the left eye is the last to be examined, the time required for alignment adjustment can be shortened by waiting in a position that includes the final position and moves towards the right eye.

[0098] Furthermore, when in standby mode, the system is kept in a state that continuously detects the relative position information between the eye being examined and the optical head unit 100, so that it can return to adjustment operations, photography, or measurement at any time. In addition, by controlling the movement of the optical head unit 100 so that it is positioned within the range in which the relative position information between the eye being examined and the optical head unit 100 can be detected, it is possible to shorten the time required for alignment adjustment to perform the next examination.

[0099] An example of a range in which relative positional information between the eye under examination and the optical head unit 100 can be detected is the range in which the image processing unit 305 can detect the anterior eye image. In this case, the detectable range is the range in which the anterior portion of the eye under examination falls within the field of view of the observation means. It is desirable to ensure that the anterior portion of the eye under examination falls within the field of view of the observation means so that the next alignment adjustment can be performed quickly.

[0100] Furthermore, if it is determined that relative position information cannot be detected from the observation means for the anterior segment of the eye under examination, a warning may be issued to the user via the audio output unit 350, which is an example of a notification means. Alternatively, a warning message may be displayed on the display unit 310, which is an example of a display means. The head drive unit 170 may also be driven to keep the head within the detection range of the observation means for the anterior segment of the eye under examination at all times.

[0101] In S105, it is determined whether the tests included in the examination protocol selected in S101 have been completed. If not, the adjustment operation in S103 and the imaging or measurement in S104 are performed. For example, if control is being performed based on an examination protocol that involves fundus imaging after OCT imaging, and only the OCT imaging has been completed, the system proceeds to the adjustment operation or imaging for the fundus imaging that will be performed next. Once the tests included in the selected examination protocol are completed, the system proceeds to displaying the examination results in S106.

[0102] In S106, the results screen, which is an example of the second screen, is displayed. The results screen, which is an example of the second screen, includes the results of the examination included in the examination protocol set in S101, and a shooting button, which is an example of display information that accepts a re-examination instruction. Figure 5 shows an example of the results screen. For each shot, a shooting button, which is an example of display information that accepts a re-examination instruction, and a completion button, which is an example of display information that accepts a completion instruction, are displayed, and either completion or shooting can be selected. In Figure 5, since the OCT image and fundus image are displayed, the display information that accepts a re-examination instruction is the shooting button, but in the case of an examination protocol that measures refractive power, a measurement button may be displayed as the display information that accepts a re-examination instruction.

[0103] An example of display information that accepts instructions for re-examination is the capture button and the image, which are displayed in correspondence. The results screen may consist of multiple screens; for example, screens may be switched using tabs, or the screen may open when an icon is tapped while the contents of the examination are displayed, or screens may be switched by swiping on the touch panel. Figures 6(a) and (b) show examples of result screens that can be switched using tabs. In addition, a display time may be set for each screen, and the screen may switch after a predetermined time has elapsed.

[0104] Alternatively, a separate screen may be generated for each test. If a retest is requested for a test, the system may proceed to one of the following steps: adjustment, imaging, or measurement, and the results screen may be displayed again after the test is completed.

[0105] Furthermore, the aforementioned capture button and completion button can take any form. It is sufficient that the system can indicate completion for all examinations, and the completion button does not need to be displayed at all times. Additionally, checkboxes may be displayed corresponding to each image, and a button may be placed to execute the capture of all checked images at once. Figure 7 shows an example of a screen with checkboxes. Alternatively, the system may be configured so that either completion or capture can be selected by dragging and dropping icons or images corresponding to the examinations into a designated area.

[0106] The results screen may display numerical values ​​and a status bar indicating image quality, indicators showing the location and degree of effects such as flare and vignetting, and images with lines or frames indicating the scan position superimposed on the frontal fundus image. The system may also have a function to read and display the subject's past examination results on the results screen.

[0107] In S107, a decision is made regarding the acceptance status of the re-inspection instruction in S106, determining whether to complete or re-inspect. At this time, the results of the instructed inspection and related information may be displayed on the display unit 310. Figure 8(a) shows the decision screen displaying the instructions for each inspection. In Figure 8(b), for example, only the results of the inspection for which a re-inspection was instructed are displayed. The results of other completed inspections may be identified by graying them out or other means. Furthermore, the decision screen does not necessarily have to be displayed, and the system may proceed to the inspection operation immediately after receiving the user's instruction in S107, or the system may be configured to inform the user of the next inspection information through voice guidance or other means.

[0108] In S107, if completion is instructed for all tests included in the selected test protocol, the series of tests is terminated. On the other hand, if a retest is instructed, the relevant tests are performed. At this time, the already obtained results of the instructed tests may be deleted from the storage unit 302, and only the newly obtained results may be stored in the storage unit 302. Alternatively, both the already obtained results of the instructed tests and the results obtained after the instruction is received may be stored in the storage unit 302.

[0109] In S108, adjustment operations are performed to carry out the instructed inspection. At this time, the optical head unit 100 may be driven to the final alignment position stored in the memory unit 302 in S103. By performing alignment adjustment starting from the stored alignment position, the time required for alignment adjustment can be shortened.

[0110] Once step S108 is complete, the device performs the requested retest and displays the results screen again. When the ophthalmic device of the disclosed technology performs the requested retest, it performs the test under the same test conditions as the test defined in the test protocol selected in step 101. During the execution of the test, the control unit 300 performs control based on the selected test protocol. The series of tests ends when the device is instructed to complete all tests included in the selected test protocol.

[0111] The ophthalmic device of this embodiment allows for smooth ophthalmic examinations and improves the usability of the ophthalmic device.

[0112] (Example 2) In this embodiment, an ophthalmic device that performs both OCT imaging and visible light fundus imaging is described as an example of an ophthalmic device according to the disclosed technology. The ophthalmic device according to this embodiment stores an examination protocol that defines a series of control procedures including both OCT imaging and visible light fundus imaging, and the user can select and execute one of several examination protocols.

[0113] The device according to this embodiment is an ophthalmic device equipped with a Stop button and a Restart button. The Stop button is an example of display information that accepts an instruction to interrupt control based on the selected examination protocol. The Restart button is an example of display information that accepts an instruction to resume control when control has been interrupted. While control based on the selected examination protocol is being executed, the user can tap the Stop button to interrupt the operation. By tapping the Restart button, the user can resume control based on the selected examination protocol without returning to the examination protocol selection screen.

[0114] The configuration of the apparatus, the configuration of the control unit, the method for detecting relative position information, and the method for adjustment operation in Example 2 are the same as those of the apparatus, the configuration of the control unit, the method for detecting relative position information, and the method for adjustment operation in Example 1, so their explanation will be omitted.

[0115] <Operational flow of a series of tests based on the inspection protocol> The operation flow of a series of inspections based on the inspection protocol in this embodiment will be explained with reference to Figures 9 and 10.

[0116] Since S201, S202, and S203 are identical to S101, S102, and S103 respectively, their explanations will be omitted. This embodiment differs in that, in S204, the display unit 310 displays a Stop button, which is an example of display information that accepts an instruction to interrupt control, and a Restart button, which is an example of display information that accepts an instruction to resume control.

[0117] If the subject's movements are unstable, or if the user determines that the intended examination cannot be performed, the system accepts a command to interrupt control based on the examination protocol in order to perform imaging under optimal conditions. Furthermore, when optimal conditions are achieved, the system accepts a command to resume control based on the examination protocol without returning to the examination protocol selection screen, allowing for the desired examination to be performed quickly.

[0118] In S204, a decision is made to interrupt the control based on the inspection protocol. When the user taps the Stop button 1004, the control based on the inspection protocol is interrupted. Note that although S204 is shown between the adjustment operation and the image capture in Figure 9, this order is not required. The Stop button 1004 may be configured to accept user input at any step between steps S202 and S205. When the Stop button 1004 is tapped, the image capture control unit 301 interrupts its operation.

[0119] When operation is interrupted, the user can input a command by tapping the Restart button 1005. When the Restart button 1005 is tapped, control based on the selected inspection protocol is resumed. At this time, the resumed inspection will be an inspection with the same inspection conditions as the inspection that was being performed. When the control unit 100 resumes control, it resumes control from the adjustment operation or image capture that was being performed when the control was interrupted. Similarly, when performing a measurement, the control unit 100 resumes control from the adjustment operation or measurement that was being performed when the control was interrupted. For example, in an inspection protocol that involves taking two images, if the adjustment operation for the first image capture was in progress, the control will resume from the adjustment operation for the first image capture.

[0120] Furthermore, the adjustment operation may be resumed from the interrupted state, or it may be resumed by returning to a stage before the interruption. In addition, it may be configured to resume by returning to a stage set in advance by the user. Since the memory unit 302 stores the inspection protocol that was in progress, the control unit 100 can resume control without returning to the inspection protocol selection screen.

[0121] Furthermore, when in standby mode, the system may be kept in a state that continuously detects relative position information, similar to Example 1. In addition, if relative position information cannot be detected, a notification means may be provided so that the user can confirm the warning. It is also possible to drive the head drive unit 170 so that the eye under examination remains within the detection range at all times.

[0122] In Figure 9, the process is considered complete after the imaging in S205. However, it is also possible to add steps S105-108 of Example 1 as a flow chart and perform the process as a combination of Examples 1 and 2.

[0123] According to the ophthalmic device of this embodiment, the interrupted examination can be resumed without returning to the examination protocol selection screen, thereby improving the usability of the ophthalmic device.

[0124] Examples 1 and 2 describe an ophthalmic device capable of performing OCT imaging and fundus photography to obtain examination results as images. However, a configuration that measures ocular characteristics such as refractive power may also be used.

[0125] Furthermore, while we have described an example where the control device is located inside the ophthalmic device, it is also possible for the control unit capable of controlling the ophthalmic device to be located in an external device. Examples of such control devices include personal computers and tablet terminals.

[0126] Furthermore, the control means may consist of multiple control units. For example, one control unit may cause the display means to display the inspection results, while another control unit may initiate control of the optical unit and the drive means. These multiple control units may be located inside the ophthalmic device, or they may be located separately inside and outside the ophthalmic device.

[0127] (Example 3) This embodiment describes an ophthalmic device that allows for a predetermined waiting time between examinations in an examination protocol that performs multiple examinations, depending on the content of the preceding and succeeding examinations. When multiple examinations are performed automatically and consecutively, the examination process may stop unnecessarily before the start of each examination, resulting in an overall longer examination time. Furthermore, it may not be possible to stop the examination at any desired timing during the examination, potentially leading to failed imaging. Therefore, this embodiment aims to efficiently perform consecutive examinations and obtain stable examination results. Note that the configuration of the device, the configuration of the control unit, the method for detecting relative position information, and the method for adjustment operation in Embodiment 3 are the same as those in Embodiment 1, so their explanation is omitted. In addition, the operation flow of this embodiment may be combined with or replaced with at least a part of the operation flows described in the various embodiments described above, as long as there is no contradiction.

[0128] The operation flow of the inspection in this embodiment will be explained with reference to Figures 12 and 13. Prior to imaging, the examiner first selects an inspection protocol on an inspection protocol selection screen (not shown) displayed on the display unit 310. The inspection protocol selection screen displays multiple inspection protocols that are pre-stored in the storage unit 302. An inspection protocol defines a series of control procedures for performing multiple inspections, including alignment adjustment. Furthermore, the imaging mode, imaging parameters, imaging conditions such as left and right eyes, the number of inspections, and the order of inspections for the multiple inspections defined in the inspection protocol may also be selectable.

[0129] Next, when the user moves from the examination protocol selection screen to the imaging screen, the image acquisition unit 304 starts acquiring anterior eye images. At this time, the screen 311 shown in Figure 12(a) is displayed on the display unit 310. The screen 311 is provided with an anterior eye image display area 323 (the anterior eye image is not yet displayed at this stage), a fundus image display area 324, and a tomographic image display area 325. The screen 311 is also provided with an examination start button 326 (start acceptance means) for accepting the start of the examination. Before the examination starts, the anterior eye image is displayed as a moving image on the anterior eye image display area 323.

[0130] Next, the subject is seated in front of the device. In this position, the examiner operates the head drive unit 170, which is capable of driving the optical head unit 100 in three dimensions (X, Y, Z), by operating an operating means (not shown). Specifically, the optical head unit 100 is moved so that a portion of the pupil of the subject's eye E is displayed on the anterior eye image display area 323. At this time, the subject's eye E is illuminated by infrared light from the illumination light source 125.

[0131] After a portion of the pupil of the eye E being examined is displayed on the anterior eye image display area 323, the examiner presses the start test button 326 to begin the examination protocol.

[0132] Figure 13 shows the flow of the examination protocol controlled by the imaging control unit 301. Figure 12(a) shows an example of an examination protocol in which tomographic imaging and fundus imaging (first examination) are performed on the subject's left eye once each, followed by tomographic imaging (second examination) and fundus imaging on the right eye once each. The operation of this examination protocol will be explained below.

[0133] In step S501, the imaging control unit 301 starts the inspection protocol and proceeds to step 502.

[0134] In step S502, the imaging control unit 301 performs three-dimensional (X, Y, Z) alignment of the left eye and the optical head unit 100 using the method described above. Once the alignment of the optical head unit 100 is complete, the process proceeds to step S503.

[0135] In step S503, the image acquisition unit 304 starts acquiring preview images of the fundus image and tomography image. The shooting control unit 301 then controls each part of the optical head 100 based on the acquired images and performs shooting adjustments. These shooting adjustments include focus adjustment and exposure adjustment for fundus image acquisition, focus adjustment and optical path length adjustment for tomography image acquisition, etc. Also, the screen 312 shown in Figure 12(b) is displayed on the display unit 310. A standby button 327 (standby instruction receiving means) is provided on the screen 312. The fundus image display area 324 displays the fundus image, and the tomography image display area 325 displays the tomography image.

[0136] Once the shooting adjustments are complete, proceed to step S504.

[0137] In step S504, the imaging control unit 301 performs tomographic imaging using infrared light under the imaging conditions defined in the examination protocol. Once imaging is complete, the process proceeds to step S505.

[0138] In step S505, the imaging control unit 301 performs fundus image acquisition using visible light under the imaging conditions defined in the examination protocol. The imaging control unit 301 may perform further adjustments to the imaging settings as needed before acquiring the fundus image. Once the acquisition is complete, the process proceeds to step S506.

[0139] In step S506, the imaging control unit 301 controls the head drive unit 170 so that the optical head unit 100 moves from in front of the left eye to in front of the right eye. The amount of movement here may be a predetermined fixed amount, or it may be a movement amount based on past alignment results. Once the movement is complete, the process proceeds to step S507.

[0140] In step S507, the same alignment operation as in step S502 is initiated, and once the image processing unit 305 has detected the pupil, the process proceeds to step S508. If the pupil cannot be detected at this point, the user may be given the option to take action.

[0141] In step S508, the imaging control unit 301 temporarily suspends the examination operation to dilate the pupils of the eyes, which have constricted due to the effects of the previous examination using visible light. During standby, the operation described later is performed. Also, the screen 313 shown in Figure 12(c) is displayed on the display unit 310. The screen 313 is provided with a standby remaining time display unit 328, a standby release button 329 (standby release switch), and a standby extension button 330 (standby extension switch). When the conditions for canceling standby, as described later, are met, the process proceeds to step S509.

[0142] In step S509, the same alignment operation as in step S502 is performed, and once the alignment is complete, the process proceeds to step S510.

[0143] Steps S510 to S512 perform the same operations as steps S503 to S505.

[0144] In step S513, a confirmation screen of the shooting results (not shown) is displayed on the display unit 310, and the inspection is completed.

[0145] In the inspection flow shown in Figure 13, an example is shown where the imaging operation is performed immediately in steps S504, S505, S511, and S512, but it is also possible to perform the imaging after a predetermined time has elapsed.

[0146] Furthermore, while Figure 13 shows an example of performing alignment movements in steps S502, S507, and S509, the alignment movement for the left eye may also be continued between steps S503 and S505, and the alignment movement for the right eye may also be continued between steps S510 and S512.

[0147] Furthermore, while the inspection flow in Figure 13 shows an example where the inspection is put on hold in step S508, it is sufficient to temporarily stop the imaging (steps S511, S512). Therefore, step S508, which puts the inspection on hold, may be performed during the alignment operation or imaging operation (steps S507-S510).

[0148] <First standby operation flow during standby> The standby operation in step S508, which is performed in the inspection following the inspection using visible light, will be explained using the flowchart in Figure 14.

[0149] In step S601, the imaging control unit 301 temporarily suspends the inspection operation, starts standby mode, and proceeds to step S602. The imaging control unit 301 also sets the standby time and counts down the remaining standby time from steps S602 to S609. The output control unit 303 then displays the remaining time on the standby time display unit 328 on the screen 313 shown in Figure 12(c). The output control unit 303 also notifies the remaining time by voice via the audio output unit 350.

[0150] In step S602, if the shooting control unit 301 detects that the standby release button 329 on the screen 313 shown in Figure 12(c) has been pressed, it proceeds to step S610. If the standby release button 329 has not been pressed, it proceeds to step S603.

[0151] In step S603, if the shooting control unit 301 detects that the standby extension button 330 on the screen 313 shown in Figure 12(c) has been pressed, it proceeds to step S604. If the standby release button 330 has not been pressed, it proceeds to step S605.

[0152] In step S604, the shooting control unit 301 extends the remaining standby time by a predetermined amount of time. The output control unit 303 also updates the remaining standby time display 328 on the screen 313 shown in Figure 12(c). Then, the process proceeds to step S605. The extension time here may be a predetermined fixed value or it may be set separately. For example, 5 seconds may be added each time the button is pressed.

[0153] In step S605, the shooting control unit 301 determines whether the remaining time for the standby operation has become 0 (whether the standby time has elapsed since the start of standby). If the remaining time for the standby operation is 0, the process proceeds to step S610. If the remaining time for the standby operation is not 0, the process proceeds to step S606.

[0154] The waiting time here is determined by the type or parameters of the preceding and succeeding examinations, because the degree of pupillary constriction caused by the previous examination will differ. For example, if the amount of visible light used in the previous examination is low, pupillary constriction is less likely to occur in the eye being examined. Therefore, the waiting time can be determined by the amount of visible light used in the previous examination.

[0155] Furthermore, the minimum pupil diameter required varies depending on the type of examination. For example, the minimum pupil diameter required for fundus photography is approximately 3.3-4.0 mm. On the other hand, for tomography, it is approximately 2.5 mm. Therefore, the waiting time can be determined by the type of examination.

[0156] If the amount of visible light used in the previous examination was low, or if the required pupil diameter for the next examination is small, the waiting time can be shortened. Additionally, the waiting time may be adjusted based on other examination parameters such as the examination mode and the number of images taken. Furthermore, the pupil diameter may be measured at least once before or after the examination, and the waiting time may be determined based on these measurement results.

[0157] The waiting time here may be a pre-prepared value stored in the memory unit 302, or it may be read from a condition-specific table stored in the memory unit 302, or it may be calculated from a formula.

[0158] In step S606, the image processing unit 305 acquires the anterior eye image, performs the aforementioned projection modification of the anterior eye image, and proceeds to step S607.

[0159] In step S607, the image processing unit 305 detects the pupil position using the position information detection method described above, and proceeds to step S608.

[0160] In step S608, the image processing unit 305 determines whether the pupil is within the pupil detection range based on the pupil position detection information. If it is outside the range, the process proceeds to step S609. If it is within the range, the process proceeds to step S602. The pupil detection range here may be the same narrow range near the center of the screen as the range of the alignment method described above, so that the alignment in step S507 continues even during standby.

[0161] Furthermore, the anterior eye image display area 323 may be wide enough to be close to the limit of the pupil detection range, and alignment may be performed during standby operation to prevent the pupil from being lost. By widening the alignment range, it becomes unnecessary to move the optical head unit 100 violently during standby operation.

[0162] In step S609, the shooting control unit 310 controls the optical head unit 100 so that it enters the pupil detection range determined in step S608, based on the pupil position detection information acquired in step S607. Once the movement is complete, the process proceeds to step S602.

[0163] In step S610, the imaging control unit 310 cancels the standby operation and resumes the inspection operation.

[0164] This embodiment describes an ophthalmic device that, in an examination protocol performing multiple examinations, pauses the examination for a predetermined time after a visible light examination, depending on the content of the preceding and succeeding examinations. When multiple examinations are performed automatically and continuously, conventional methods require stopping the device unnecessarily between examinations to allow the pupillary constriction of the eye to resolve, which can prolong the overall examination time. In this embodiment, since the device pauses according to the preceding and succeeding examinations, it stops only when necessary, allowing for efficient and stable examination results to be obtained.

[0165] <Wait button> Next, the standby operation using the standby button 327 on the screen 311 shown in Figure 12(b) will be explained. The standby button 327 can be pressed by the examiner at any time during the inspection protocol in steps S502 to S512 of Figure 13. When the standby button 327 is pressed, the imaging control unit 301 temporarily suspends the inspection operation and performs a standby operation including alignment operations similar to those in steps S602 to S609 of Figure 14. The standby time at this time can be set by the examiner inputting or selecting a numerical value in the standby time setting unit 330 (standby time setting means) displayed on the setting screen 313 shown in Figure 12(d) before starting the inspection. Alternatively, a predetermined fixed value may be used.

[0166] Furthermore, during standby operation, screen 313 shown in Figure 12(c) is displayed, and the standby extension button 330 and standby release button 329 can be pressed. When the standby extension button 330 is pressed, the remaining standby time is extended by a predetermined time, similar to steps S603 to S604. When the standby release button 329 is pressed, standby is released and the inspection operation resumes.

[0167] Furthermore, if the standby release button 329 is pressed after the shooting adjustment (steps S503, S510), the standby extension button 330 may be given the function of a shooting button, so that shooting is performed immediately when the button is pressed.

[0168] When performing multiple tests automatically and consecutively, if the device cannot be stopped at any point during the test, there is a risk that the image may fail to be captured due to blinking or other factors during the eye examination. In this embodiment, the device can be stopped at any point, allowing for efficient and stable test results to be obtained.

[0169] (Example 4) The operation flow of this embodiment is an inspection protocol in which the inspection is performed multiple times, and the inspection is paused for a predetermined time according to the measurement result of the pupil diameter. Note that the configuration of the device, the configuration of the control unit, the method for detecting relative position information, and the method for adjustment operation of Embodiment 4 are the same as the configuration of the device, the configuration of the control unit, the method for detecting relative position information, and the method for adjustment operation of Embodiment 1, so a description is omitted. Furthermore, the operation flow of this embodiment may be implemented in combination with or replaced with at least a part of the operation flows etc. described in the various embodiments described above, to the extent that there is no contradiction.

[0170] <Method for measuring pupil diameter> This example describes how the image processing unit 305 measures pupil diameter.

[0171] The image processing unit 305 acquires an anterior eye image, performs projection modification on the anterior eye image, and detects the pupil region, similar to the method described in the operation flow of Example 3. The image processing unit 305 then approximates the boundary coordinates of the pupil region as an ellipse and measures the length of the minor axis (minor diameter) as the pupil diameter.

[0172] <Operation Flow> The inspection operation flow in this embodiment is the same as the inspection protocol (Figure 13) of the inspection operation flow in Embodiment 3, so the explanation of the inspection protocol will be omitted.

[0173] <Second standby operation flow during standby> The waiting operation in step S508, which is performed in the next inspection using visible light in this flow, is explained in flowchart 15.

[0174] In step S701, the imaging control unit 301 temporarily suspends the inspection operation and starts waiting, then proceeds to step S702. The imaging control unit 301 also sets the waiting time and counts down the remaining time for the waiting operation from steps S702 to S707. The output control unit 303 then displays the remaining time on the standby time display 328 on the screen 313 shown in Figure 12(c). The output control unit 303 also notifies the remaining time by voice via the audio output unit 350.

[0175] In steps S702 to S705, similar to steps S606 to S609 in Figure 14, the pupil position is detected from the anterior eye image, it is determined whether it is within the pupil detection range, and alignment is performed as necessary.

[0176] In step S704, if the pupil detection result is within the detection range, the process proceeds to step S706.

[0177] In step S706, the imaging control unit 301 measures the pupil diameter using the pupil diameter measurement method described above, and proceeds to step S707.

[0178] In step S707, the image processing unit 305 determines whether the pupil diameter is greater than or equal to a predetermined pupil diameter based on the pupil diameter measurement information. If it is smaller than the predetermined pupil diameter, the process proceeds to step S702. If it is larger than the predetermined pupil diameter, the process proceeds to step S708. The criteria for determining the pupil diameter here are determined by the type of the next examination and the minimum pupil diameter required for the next examination.

[0179] In step S708, the imaging control unit 310 cancels the standby operation and resumes the inspection operation.

[0180] This workflow describes an ophthalmic device that, in an examination protocol performing multiple examinations, pauses the examination for a predetermined time after a visible light examination, depending on the pupil diameter measurement result. When performing multiple examinations automatically and consecutively, conventional methods involve stopping the system unnecessarily between examinations to wait for the pupil constriction of the eye to resolve, which can prolong the overall examination time. This workflow, however, pauses only when necessary because the system waits based on the pupil diameter measurement result, allowing for efficient and stable examination results.

[0181] Furthermore, in step S706, the image processing unit 305 may predict the time until a predetermined pupil diameter is reached from the measurement results of multiple pupil diameters at different times. For example, an approximation curve may be calculated from the measurement results of multiple pupil diameters at different times to calculate the time until a predetermined pupil diameter is reached. Then, the remaining time until the predetermined pupil diameter is reached may be counted and output by the display unit 310 or the audio output unit 350.

[0182] Furthermore, the order of the tests in the examination protocol may be rearranged based on the pupil diameter measurement result obtained in step S706. For example, if a test that can be performed with a smaller pupil diameter than the pupil diameter measurement result is scheduled after a pending test in the examination protocol, the test that can be performed with the smaller pupil diameter may be performed first.

[0183] As described above, the disclosed technology provides a device that can efficiently and stably obtain test results in continuous testing.

[0184] (Variation: Result Output) When the imaging conditions were poor, a re-examination was performed, but the images obtained after re-examination did not always yield good results. Therefore, in the various embodiments described above, the images obtained after re-examination may be displayed side by side with the images before re-examination, allowing the examiner to make a selection.

[0185] Figure 16 shows two examples of displaying the test results list, (A) and (B). This is an example where five tests were performed, with test 3 requiring one retest and test 4 requiring two retests. (A) shows the number of retests by the number of icons displayed, and (B) shows that a retest was performed by hatching. When the column for test 4 is clicked, the captured images 1701, 1702, and 1705 are displayed as shown in Figure 17, and one image can be selected by clicking the corresponding selection buttons 1702, 1704, and 1706. Alternatively, a button 1708 to instruct editing may be displayed, and clicking button 1708 may be used to perform editing and generate a new image. Here, for example, an example is shown where images 1701 and 1702 are selected using selection buttons 1702 and 1704 and the images are combined. To make it clear which image is selected, the frame of the image may be colored, or the color of the selection button may be changed. Furthermore, if the test was ordered via a network, the test results, including the re-examination image and the image from before the re-examination, may be sent to the computer that requested the order, allowing the doctor to select the correct image on that computer screen.

[0186] With regard to the various embodiments and modifications described above, the following additional notes are disclosed as aspects of the disclosed technology and as selective features.

[0187] (Note 1-1) An examination unit that performs the examination of the eye being examined, A driving means for driving the inspection unit, A selection means for selecting one of several different examination protocols, according to user instructions, from among several examination protocols, each defined with a series of control procedures for performing multiple examinations, including alignment adjustments to align the examination unit with the eye being examined. The system includes control means for initiating control of the inspection unit and the drive means based on the selected inspection protocol according to predetermined conditions, The control means is an ophthalmic device that causes the display means to display the results of the plurality of tests and display information that receives an instruction to perform at least one of the plurality of tests based on the selected test protocol.

[0188] (Appendix 1-2) An examination unit that performs the examination of the eye being examined, A driving means for driving the inspection unit, The system includes control means for initiating control of the examination unit and the drive means according to predetermined conditions, based on an examination protocol that defines a series of control procedures for performing multiple examinations, including alignment adjustments for aligning the examination unit with the eye to be examined. The control means is an ophthalmic device that causes the display means to display the results of the multiple tests and display information that accepts instructions to re-examine only a portion of the multiple tests.

[0189] (Appendix 1-3) The system further comprises a selection means for selecting one of several different examination protocols, according to user instructions, from among several defined control procedures for performing multiple examinations, including alignment adjustments for aligning the examination unit with the eye under examination. The control means may initiate control of the inspection unit and the drive means based on the selected inspection protocol according to predetermined conditions.

[0190] (Appendix 1-4) The display means is a touch panel, The displayed information may also be a button that the user can tap.

[0191] (Appendix 1-5) The control means may display on the display means the result of one of the multiple tests and the display information indicating that an instruction has been received to perform the test.

[0192] (Appendix 1-6) The control means causes the display means to display a first screen that is shown while the adjustment operation, including the alignment adjustment, is in progress, and a second screen that displays the results of the multiple inspections. The second screen may consist of multiple screens that can be switched according to the user's instructions.

[0193] (Appendix 1-7) The control means causes the display means to display a first screen that is shown while the adjustment operation, including the alignment adjustment, is in progress, and a second screen that displays the results of the multiple inspections. The second screen may consist of multiple screens that switch after a predetermined amount of time has elapsed.

[0194] (Appendix 1-8) The control means may cause one of the multiple screens constituting the second screen to display the result of one of the multiple tests, and display information indicating that an instruction to perform the one test has been received.

[0195] (Appendix 1-9) The aforementioned screen may be generated each time one of the multiple tests is completed.

[0196] (Appendix 1-10) The user can select a test from among the tests included in the aforementioned test protocol that is different from the final test, The control means may cause the second screen, which displays the results of the multiple tests, to be displayed when the tests selected by the user are completed.

[0197] (Appendix 1-11) The control means is The control of the inspection unit and the drive means based on the inspection protocol is interrupted in response to user instructions. If the control of the inspection unit and the drive means based on the inspection protocol is interrupted, the control of the inspection unit and the drive means based on the inspection protocol may be resumed in response to a user instruction.

[0198] (Appendix 1-12) An examination unit that performs the examination of the eye being examined, A driving means for driving the inspection unit, The system includes control means for initiating control of the examination unit and the drive means according to predetermined conditions, based on an examination protocol that defines a series of control procedures for performing multiple examinations, including alignment adjustments for aligning the examination unit with the eye to be examined. An ophthalmic apparatus comprising control means for interrupting the control of the inspection unit and the drive means based on the inspection protocol in accordance with the user's instructions, and for resuming the control of the inspection unit and the drive means based on the selected inspection protocol in accordance with the user's instructions if the control of the inspection unit and the drive means based on the selected inspection protocol has been interrupted.

[0199] (Appendix 1-13) If the control means receives an instruction to resume control of the inspection unit and the drive means based on the selected inspection protocol, it may resume control of the inspection unit and the drive means from the interrupted inspection among the plurality of inspections defined in the selected inspection protocol.

[0200] (Appendix 1-14) If the control means receives an instruction to interrupt the control of the inspection unit and the drive means based on the inspection protocol, it may put the inspection unit into standby mode at the position of the inspection unit at the time the instruction was received.

[0201] (Appendix 1-15) The system further comprises detection means for detecting relative positional information between the eye to be examined and the examination unit, Even if the control of the inspection unit and the drive means based on the inspection protocol is interrupted, the detection of the relative position information by the detection means may continue.

[0202] (Appendix 1-16) The system may further include notification means for issuing a warning if the detection means is unable to detect the relative position information.

[0203] (Appendix 1-17) The control means may control the drive means so that the eye under examination remains within the range in which the detection means can detect the relative position information.

[0204] (Appendix 1-18) The aforementioned predetermined conditions may also be instructed by the user.

[0205] (Appendix 1-19) The control means may be capable of modifying the tests included in the test protocol according to user instructions.

[0206] (Appendix 1-20) The control means may wait for the inspection unit to complete at least one of the plurality of inspections.

[0207] (Appendix 1-21) The position in which the inspection unit is kept in standby is: The position of the inspection unit at the end of at least one of the inspections, In the direction of the optical axis of the optical system of the inspection unit, the position to which the inspection unit has moved from its position at the end of at least one examination, in the direction away from the eye being examined, Either of these is acceptable.

[0208] (Appendix 1-22) The position in which the inspection unit is kept in standby is: If the examination protocol includes examination of both the left and right eyes, and at least one of the examinations is the final examination of the right eye, The position of the testing unit at the end of at least one of the tests, and the position of the testing unit closer to the left eye from the position of the testing unit at the end of at least one of the tests, If the examination protocol includes examination of both the left and right eyes, and at least one of the examinations is the final examination of the left eye, The position of the testing unit may be either the position of the testing unit at the end of the at least one test, or the position of the testing unit closer to the right eye from the position of the testing unit at the end of the at least one test.

[0209] (Appendix 1-23) The control device is capable of aligning the examination unit to both the right and left eyes of the subject, The aforementioned examination protocol may be one that is defined as performing examinations on both the right and left eyes.

[0210] (Appendix 1-24) The inspection unit is capable of performing an OCT examination to acquire information about the characteristics of the eye under examination using multiplexed light obtained by combining the reflected light from the eye under examination, which has been irradiated with measurement light, and a reference light. The aforementioned examination protocol defines the imaging conditions for performing the OCT examination included in the plurality of examinations, The adjustment operations that the control means causes the inspection unit and the drive means to perform may include alignment adjustment, focus adjustment, and coherence gate adjustment.

[0211] (Appendix 1-25) The aforementioned imaging conditions may be at least one of the scanning pattern, scanning area, and scanning range.

[0212] (Appendix 1-26) The aforementioned examination protocol may be an examination protocol defined to include performing multiple different examinations, including fundus photography using visible light.

[0213] (Appendix 1-27) The aforementioned examination protocol may be defined as an examination protocol that includes both an OCT examination, which acquires information on the characteristics of the eye by combining the reflected light from the eye irradiated with measurement light with a reference light and using the resulting combined light, and fundus photography using visible light.

[0214] (Appendix 1-28) An examination unit that performs OCT imaging to acquire a tomographic image of the eye under examination using multiplexed light obtained by combining the reflected light from the eye under examination, which has been irradiated with measurement light, and a reference light, and fundus imaging using visible light, A driving means for driving the inspection unit, The system includes a selection means for selecting one of several shooting conditions for the aforementioned OCT imaging according to the user's instructions. An ophthalmic apparatus comprising control means that, according to predetermined conditions, gives instructions to automatically perform, in order, adjustment operations including alignment adjustment, focus adjustment, and coherence gate adjustment, OCT imaging based on the selected imaging conditions, and fundus imaging, wherein control means causes a display means to display an OCT image of the eye under examination taken by the OCT imaging based on the selected imaging conditions, a fundus image of the eye under examination taken by the fundus imaging, and display information indicating that an instruction has been received to perform at least one of the OCT imaging and fundus imaging based on the selected imaging conditions.

[0215] (Appendix 1-29) A control method for an ophthalmic apparatus comprising an examination unit for performing an examination of an eye to be examined, and a driving means for driving the examination unit, The process includes selecting one of several different testing protocols from a set of control procedures defined for performing multiple tests, including alignment adjustments to align the testing unit with the eye being tested, according to the user's instructions. The steps include: starting control of the inspection unit and the drive means based on the selected inspection protocol according to predetermined conditions; A step of displaying the results of the plurality of inspections and display information that receives an instruction to perform at least one of the plurality of inspections based on the selected inspection protocol on a display means, A method for controlling ophthalmic devices, including those mentioned above.

[0216] (Appendix 1-30) A control method for an ophthalmic apparatus comprising an examination unit for performing an examination of an eye to be examined, and a driving means for driving the examination unit, A step of starting control of the inspection unit and the drive means according to predetermined conditions, based on an inspection protocol that defines a series of control procedures for performing multiple inspections, including alignment adjustments to align the inspection unit with the eye to be examined, A step of displaying the results of the aforementioned multiple tests and display information that accepts instructions for re-examining only a portion of the aforementioned multiple tests on a display means, A method for controlling ophthalmic devices, including those mentioned above.

[0217] (Appendix 1-31) A control method for an ophthalmic apparatus comprising an examination unit for performing an examination of an eye to be examined, and a driving means for driving the examination unit, A step of starting control of the inspection unit and the drive means according to predetermined conditions, based on an inspection protocol that defines a series of control procedures for performing multiple inspections, including alignment adjustments to align the inspection unit with the eye to be examined, A step of interrupting the control of the inspection unit and the drive means based on the inspection protocol in accordance with the user's instructions, If the control of the inspection unit and the drive means based on the selected inspection protocol is interrupted, the control of the inspection unit and the drive means based on the selected inspection protocol is restarted in accordance with the user's instructions. A method for controlling ophthalmic devices, including those mentioned above.

[0218] (Appendix 1-32) A control method for an ophthalmic apparatus comprising: an examination unit that performs OCT imaging to acquire a tomographic image of an eye using multiplexed light obtained by combining the reflected light from the eye irradiated with measurement light and a reference light, and fundus imaging using visible light; and a driving means for driving the examination unit, The process of selecting one of several imaging conditions for the aforementioned OCT imaging according to the user's instructions, A process of giving instructions to automatically perform, in order, adjustment operations including alignment adjustment, focus adjustment, and coherence gate adjustment, OCT imaging based on the selected imaging conditions, and fundus imaging, according to predetermined conditions, A step of displaying on a display means an OCT image of the eye under examination taken by the OCT imaging based on the selected imaging conditions, a fundus image of the eye under examination taken by the fundus imaging, and display information that receives an instruction to perform at least one of the OCT imaging and fundus imaging based on the selected imaging conditions. A method for controlling ophthalmic devices, including those mentioned above.

[0219] (Appendix 1-33) This could also be a program that causes a computer to execute a control method for ophthalmic equipment.

[0220] (Note 2-1) An examination unit for performing an examination on the eye to be examined, and an alignment means for aligning the examination unit with respect to the eye to be examined, A position information detection means for detecting the relative position information of the eye to be examined and the examination unit, A storage means for storing an examination sequence that defines a series of control procedures for performing an examination multiple times, including an alignment operation for aligning the examination unit with the eye to be examined, The system includes a control means that controls the alignment by the alignment means based on the relative positional relationship, and controls the inspection unit to perform the inspection according to the stored inspection sequence. The control means is characterized in that it causes the examination unit to wait for a predetermined time after the first examination, which is performed using visible light, has been performed, and before the next examination, which is the second examination, has been performed.

[0221] (Note 2-2) An examination unit that optically examines the eye being examined, An observation means having at least two imaging units that photograph the anterior segment of the eye under examination from a direction different from the optical axis of the examination unit, Alignment means for aligning the examination unit with respect to the eye to be examined, A conversion means that uses images captured by at least two of the aforementioned imaging units to convert them into images captured from the optical axis direction of the inspection unit, An ophthalmic apparatus characterized by having a control means for superimposing and displaying an alignment reference mark, which is the reference for the aforementioned alignment, onto the converted image.

[0222] (Appendix 2-3) The alignment reference mark may also be a mark indicating the pupil diameter required for the examination.

[0223] (Appendix 2-4) A driving means for driving the alignment means, A position information detection means for detecting relative position information between the eye under examination and the examination unit based on the output of the observation means, A storage means for storing an examination sequence that defines a series of control procedures for performing an examination multiple times, including an alignment operation for aligning the examination unit with the eye to be examined, A start reception means that receives an instruction to start the stored inspection sequence. Control means for controlling the inspection unit to perform multiple inspections. It further possesses, The control means is In response to the start instruction, the drive means is controlled based on the relative positional relationship, and the inspection unit is controlled according to the stored inspection sequence to perform the inspection. After performing the first inspection, which uses visible light, among the multiple inspections described above, the inspection unit may be made to wait for a predetermined time before performing the second inspection.

[0224] (Appendix 2-5) An observation method for observing the anterior segment of the subject's eye, A testing unit that performs an examination on the eye to be examined, Alignment means for aligning the examination unit with respect to the eye to be examined, A driving means for driving the alignment means, A position information detection means for detecting relative position information between the eye under examination and the examination unit based on the output of the observation means, A storage means for storing an examination sequence that defines a series of control procedures for performing an examination multiple times, including an alignment operation for aligning the examination unit with the eye to be examined, A start reception means that receives an instruction to start the stored inspection sequence, The system includes a control means that controls the drive means based on the relative positional relationship in response to the start instruction, and controls the inspection unit to perform the inspection according to the stored inspection sequence, The control means is An ophthalmic apparatus characterized by having the examination unit wait for a predetermined time after performing the first examination, which is performed using visible light, and before performing the second examination, which is the next examination, among the multiple examinations described above.

[0225] (Appendix 2-6) The predetermined time is The waiting time may vary depending on the type of the first and second tests and at least one of the test parameters.

[0226] (Appendix 2-7) The aforementioned test parameters are: This may include information regarding the amount of visible light used in the first examination and the minimum pupil diameter required for the second examination.

[0227] (Appendix 2-8) The control means is The examination unit may be placed in front of the eye being examined in the second examination.

[0228] (Appendix 2-9) The system includes a pupil diameter measuring means for measuring the pupil diameter of the eye being examined based on the image captured by the aforementioned imaging unit, When the pupil diameter of the subject eye measured by the pupil diameter measuring means reaches a predetermined pupil diameter, the control unit may execute the second examination.

[0229] (Appendix 2-10) Prediction means for predicting the time until the pupil diameter of the subject eye reaches the predetermined pupil diameter based on the output from the pupil diameter measuring means, Counting means for counting the remaining time until the pupil diameter reaches the predetermined pupil diameter, The apparatus may further include notification means for notifying the remaining time counted by the counting means.

[0230] (Appendix 2-11) If the pupil diameter of the subject eye measured by the pupil diameter measuring means during standby is smaller than the predetermined pupil diameter, and If an examination that can be performed with a smaller pupil diameter is scheduled after the examination during standby in the examination sequence, The control unit may execute the examination that can be performed with the smaller pupil diameter first.

[0231] (Appendix 2-12) An examination unit for performing an examination on the subject eye, Alignment means for aligning the examination unit with the subject eye, Position information detection means for detecting the relative position information between the subject eye and the examination unit, Storage means for storing an examination sequence that defines a series of control procedures for repeatedly performing an examination including an alignment operation for aligning the examination unit with the subject eye, Control means for controlling the alignment by the alignment means based on the relative position relationship and controlling the examination unit according to the stored examination sequence to execute the examination, An ophthalmic apparatus, comprising reception means for receiving an instruction to temporarily stop the operation during the operation of the examination sequence and wait for a predetermined time.

[0232] (Appendix 2-13) The system may further include setting means for setting the predetermined time.

[0233] (Appendix 2-14) The control means is The examination unit may be placed on standby in front of the eye that is scheduled to be aligned next, or is currently being aligned.

[0234] (Appendix 2-15) The system further includes an extension switch that instructs to extend the aforementioned waiting time by a predetermined period of time. Each time the extension switch is activated, the waiting time may be extended by a predetermined period.

[0235] (Appendix 2-16) The system may further include a release switch that instructs the system to cancel the standby state.

[0236] (Appendix 2-17) The inspection unit is a composite inspection unit capable of performing multiple different inspections, The examination performed using visible light may be an examination that illuminates the fundus of the eye being examined and obtains an image of the fundus of the eye being examined.

[0237] (Appendix 2-18) A counting means for counting the remaining time of the aforementioned waiting time, The system may further include a notification means for notifying the remaining time counted by the counting means.

[0238] (Appendix 2-19) The notification means may also be the display means for displaying the remaining time.

[0239] (Appendix 2-20) The notification means may also be a means for notifying the remaining time by voice.

[0240] (Appendix 2-21) The location information detection means continues to detect location information even during standby. When the position of the eye to be examined approaches the limit of the detection range of the position information detection means, the control means may control the alignment means so that the position of the eye to be examined remains within the detection range of the position information detection means.

[0241] (Appendix 2-22) A control method for an ophthalmic device having an inspection unit that performs an inspection on an eye to be examined and an alignment means for aligning the inspection unit with the eye to be examined, comprising: a step of detecting relative position information between the eye to be examined and the inspection unit; a step of storing an inspection sequence that defines a series of control procedures for performing a plurality of inspections including an alignment operation for aligning the inspection unit with the eye to be examined; a control step of controlling the alignment by the alignment means based on the relative position relationship and controlling the inspection unit according to the stored inspection sequence to perform an inspection, In the control step, after performing a first inspection using visible light among the inspections to be performed a plurality of times, the inspection unit is made to wait for a predetermined time before performing a second inspection which is the next inspection. A control method for an ophthalmic device characterized by this.

[0242] (Appendix 2-23) A control method for an ophthalmic device having at least two imaging units that image the anterior eye part of the eye to be examined from a direction different from the optical axis of an inspection unit that optically inspects the eye to be examined, comprising: [[ID=二十二]]an alignment step of aligning the inspection unit with the eye to be examined; a conversion step of converting, using the images respectively captured by the at least two imaging units, into an image captured from the direction of the optical axis of the inspection unit; a control step of superimposing and displaying an alignment reference mark which is a reference at the time of alignment on the converted image. A control method for an ophthalmic device characterized by having this.

[0243] (Appendix 2-24) observation means for observing the anterior eye part of the eye to be examined of the subject, A testing unit that performs an examination on the eye to be examined, Alignment means for aligning the examination unit with respect to the eye to be examined, A driving means for driving the alignment means, A position information detection means for detecting relative position information between the eye under examination and the examination unit based on the output of the observation means, A storage means for storing an examination sequence that defines a series of control procedures for performing an examination multiple times, including an alignment operation for aligning the examination unit with the eye to be examined, A start reception means that receives an instruction to start the stored inspection sequence, A control method for an ophthalmic device, comprising: a control means that controls the driving means based on the relative positional relationship in response to the start instruction; and a control means that controls the examination unit to perform an examination according to the stored examination sequence, A control method for an ophthalmic device, characterized in that, after performing the first test, which is performed using visible light, among the multiple tests described above, the test unit is made to wait for a predetermined time before performing the second test, which is the next test.

[0244] (Note 3-1) An ophthalmic device that automatically performs multiple tests on the eye being examined using an examination unit, An inspection means that performs the plurality of inspections sequentially using the inspection unit, Between the first and second tests, there is a reception mechanism for receiving specific instructions, An ophthalmic apparatus characterized by having control means for controlling the inspection means in accordance with the instructions.

[0245] (Appendix 3-2) Alignment means for aligning the examination unit with respect to the eye to be examined, A position information detection means for detecting the relative position information of the eye to be examined and the examination unit, The system further includes storage means for storing an examination sequence that defines a series of control procedures for performing an examination multiple times, including an alignment operation for aligning the examination unit with the eye to be examined. The control means controls the alignment by the alignment means based on the relative positional relationship, and controls the inspection unit to perform the inspection according to the stored inspection sequence. After performing the first inspection, which is one of several inspections performed using visible light, the inspection unit may be kept in standby mode before performing the second inspection.

[0246] (Appendix 3-3) An observation means having at least two imaging units that photograph the anterior segment of the eye under examination from a direction different from the optical axis of the examination unit, Alignment means for aligning the examination unit with respect to the eye to be examined, A conversion means that uses images captured by at least two of the aforementioned imaging units to convert them into images captured from the optical axis direction of the inspection unit, The system may further include output control means for superimposing and displaying alignment reference marks, which are the references used during the alignment process, onto the converted image.

[0247] (Appendix 3-4) A control method for an ophthalmic device that automatically performs multiple tests using an examination unit on an eye under examination, An inspection process in which the plurality of inspections are performed sequentially using the inspection unit, Between the first and second inspections, there is a reception process for receiving specific instructions, A method for controlling an ophthalmic device, characterized by comprising a control step of controlling the inspection means in accordance with the instructions.

[0248] (Appendix 3-5) A driving means for driving the inspection unit, The system further includes a selection means for selecting one of several different test sequences, according to user instructions, from a set of control procedures defined for performing multiple tests, including alignment adjustments to align the test unit with the eye being examined. The control means initiates control of the inspection unit and the drive means based on the selected inspection sequence, according to predetermined conditions. The display means may display the results of the plurality of tests and display information indicating that an instruction has been received to perform at least one of the plurality of tests based on the selected test sequence.

[0249] (Other examples) Furthermore, the disclosed technology can also be realized by performing the following process: that is, the disclosed technology can also be realized by supplying software (programs) that implement one or more of the functions of the various embodiments and modifications described above to a system or device via a network or storage medium, and the computer (or CPU, MPU, etc.) of that system or device reads and executes the program. The computer has one or more processors or circuits and may include a network of separate computers or separate processors or circuits in order to read and execute computer executable instructions.

[0250] In this case, the processor or circuit may include a central processing unit (CPU), a microprocessing unit (MPU), a graphics processing unit (GPU), an application-specific integrated circuit (ASIC), or a field-programmable gateway (FPGA). Furthermore, the processor or circuit may include a digital signal processor (DSP), a dataflow processor (DFP), or a neural processing unit (NPU).

Claims

1. An examination unit that performs the examination of the eye being examined, A driving means for driving the inspection unit, A selection means for selecting one of several different examination protocols, according to user instructions, from among several examination protocols, each defined with a series of control procedures for performing multiple examinations, including alignment adjustments to align the examination unit with the eye being examined. The system includes control means for initiating control of the inspection unit and the drive means based on the selected inspection protocol according to predetermined conditions, The control means is After starting the control of the inspection unit and the drive means according to the predetermined conditions, the inspection unit and the drive means are controlled so that the plurality of inspections, including inspections with different imaging methods, are automatically and continuously performed. An ophthalmic device that displays the results of the aforementioned multiple tests and display information indicating that an instruction has been received to retest at least one of the aforementioned multiple tests, on a display means.

2. The ophthalmic apparatus according to claim 1, wherein the control means causes each of the multiple different examination protocols to be displayed as an icon on the display means.

3. The display means is a touch panel, The ophthalmic device according to claim 1 or 2, wherein the displayed information is a button that the user can tap.

4. The ophthalmic apparatus according to any one of claims 1 to 3, wherein the control means displays on the display means in association with the result of one of the results of the plurality of tests and the display information that receives an instruction to perform the one test.

5. The control means causes the display means to display a first screen that is shown while the adjustment operation, including the alignment adjustment, is in progress, and a second screen that displays the results of the multiple inspections. The ophthalmic apparatus according to any one of claims 1 to 4, wherein the second screen is composed of multiple screens that can be switched according to the user's instructions or multiple screens that are switched after a predetermined time has elapsed.

6. The ophthalmic apparatus according to claim 5, wherein the control means causes one of the plurality of screens constituting the second screen to display the result of one of the plurality of tests and display information for receiving an instruction to perform the one test.

7. The ophthalmic apparatus according to claim 6, wherein the aforementioned screen is generated after the completion of one of the multiple examinations.

8. The user can select a test from among the tests included in the aforementioned test protocol that is different from the final test, The ophthalmic apparatus according to any one of claims 5 to 7, wherein the control means displays the second screen showing the results of the plurality of tests at the end of the tests selected by the user.

9. The control means is The control of the inspection unit and the drive means based on the inspection protocol is interrupted in response to user instructions. The ophthalmic apparatus according to any one of claims 1 to 8, wherein if the control of the inspection unit and the drive means based on the inspection protocol is interrupted, the control of the inspection unit and the drive means based on the inspection protocol is resumed in response to a user's instruction.

10. An examination unit that performs the examination of the eye being examined, A driving means for driving the inspection unit, A selection means for selecting one of several different examination protocols, according to user instructions, from among several examination protocols, each defined with a series of control procedures for performing multiple examinations, including alignment adjustments to align the examination unit with the eye being examined. The system includes control means for initiating control of the inspection unit and the drive means based on the selected inspection protocol according to predetermined conditions, The control means is After starting the control of the inspection unit and the drive means according to the predetermined conditions, the inspection unit and the drive means are controlled to automatically and continuously perform the plurality of inspections, including inspections with different imaging methods. An ophthalmic device that displays the results of the aforementioned multiple tests and display information indicating instructions for re-examination of at least two of the aforementioned multiple tests on a display means.

11. The ophthalmic apparatus according to claim 9 or 10, wherein the control means, upon receiving an instruction to resume control of the inspection unit and the drive means based on the inspection protocol, resumes control of the inspection unit and the drive means from the interrupted inspection among the plurality of inspections defined in the inspection protocol.

12. The apparatus according to any one of claims 9 to 11, wherein the control means, when it receives an instruction to interrupt the control of the inspection unit and the drive means based on the inspection protocol, causes the inspection unit to stand at the position of the inspection unit at the time the instruction was received.

13. The system further comprises detection means for detecting relative positional information between the eye to be examined and the examination unit, The ophthalmic apparatus according to any one of claims 9 to 12, wherein the detection of the relative position information by the detection means is continued even when the control of the inspection unit and the driving means based on the inspection protocol is interrupted.

14. The ophthalmic apparatus according to claim 13, further comprising a notification means for issuing a warning when the detection means is unable to detect the relative position information.

15. The ophthalmic apparatus according to claim 13 or 14, wherein the control means controls the drive means so that the eye under examination remains within a range in which the detection means can detect the relative position information.

16. The ophthalmic apparatus according to any one of claims 1 to 15, wherein the predetermined conditions are instructions from the user.

17. The ophthalmic apparatus according to any one of claims 1 to 16, wherein the control means is capable of changing the tests included in the test protocol according to the user's instructions.

18. The ophthalmic apparatus according to any one of claims 1 to 17, wherein the control means waits in a predetermined position after the completion of at least one of the plurality of tests.

19. The position in which the inspection unit is kept in standby is: The position of the inspection unit at the end of at least one of the inspections, In the direction of the optical axis of the optical system of the inspection unit, the position to which the inspection unit has moved from its position at the end of at least one examination, in the direction away from the eye being examined, The ophthalmic device according to claim 18, which is any of the following:

20. The position in which the inspection unit is kept in standby is: If the examination protocol includes examination of both the left and right eyes, and at least one of the examinations is the final examination of the right eye, The position of the testing unit at the end of at least one of the tests, and the position of the testing unit closer to the left eye from the position of the testing unit at the end of at least one of the tests, If the examination protocol includes examination of both the left and right eyes, and at least one of the examinations is the final examination of the left eye, The ophthalmic apparatus according to claim 18, wherein the position of the examination unit is either the position of the examination unit at the end of the at least one examination, or the position of the examination unit closer to the right eye from the position of the examination unit at the end of the at least one examination.

21. The control means is capable of aligning the examination unit to both the right and left eyes of the subject, The ophthalmic apparatus according to any one of claims 1 to 20, wherein the examination protocol is defined as an examination protocol that performs examinations on both the right and left eyes.

22. The inspection unit is capable of performing an OCT examination to acquire information about the characteristics of the eye under examination using multiplexed light obtained by combining the reflected light from the eye under examination, which has been irradiated with measurement light, and a reference light. The aforementioned examination protocol defines the imaging conditions for performing the OCT examination, which is included in the plurality of examinations. The ophthalmic apparatus according to any one of claims 1 to 21, wherein the adjustment operation that the control means causes the inspection unit and the drive means to perform is alignment adjustment, focus adjustment, and coherence gate adjustment.

23. The ophthalmic apparatus according to claim 22, wherein the aforementioned imaging conditions are at least one of a scanning pattern, a scanning area, and a scanning range.

24. The ophthalmic apparatus according to any one of claims 1 to 23, wherein the examination protocol is defined as performing both an OCT examination, in which information on the characteristics of the eye is acquired using multiplexed light obtained by combining the reflected light from the eye irradiated with measurement light and a reference light, and fundus photography using visible light.

25. A control method for an ophthalmic apparatus comprising an examination unit for performing an examination of an eye to be examined, and a driving means for driving the examination unit, The process includes selecting one of several different testing protocols from a set of control procedures defined for performing multiple tests, including alignment adjustments to align the testing unit with the eye being tested, according to the user's instructions. The steps include: starting control of the inspection unit and the drive means based on the selected inspection protocol according to predetermined conditions; After the control of the inspection unit and the drive means is started according to the predetermined conditions, the inspection unit and the drive means are controlled so that the plurality of inspections, including inspections with different imaging methods, are automatically and continuously performed. A step of displaying the results of the aforementioned multiple tests and display information that accepts instructions for retesting at least one of the aforementioned multiple tests on a display means, A method for controlling ophthalmic devices, including those mentioned above.

26. A control method for an ophthalmic apparatus comprising an examination unit for performing an examination of an eye to be examined, and a driving means for driving the examination unit, The process includes selecting one of several different testing protocols from a set of control procedures defined for performing multiple tests, including alignment adjustments to align the testing unit with the eye being tested, according to the user's instructions. The steps include: starting control of the inspection unit and the drive means based on the selected inspection protocol according to predetermined conditions; After the control of the inspection unit and the drive means is started according to the predetermined conditions, the inspection unit and the drive means are controlled so that the plurality of inspections, including inspections with different imaging methods, are automatically and continuously performed. A step of displaying the results of the aforementioned multiple tests and display information that accepts instructions for retesting at least two of the aforementioned multiple tests on a display means, A method for controlling ophthalmic devices, including those mentioned above.

27. A program that causes a computer to execute the control method for an ophthalmic device according to claim 25 or 26.

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