JP2017225638A - Ophthalmic equipment - Google Patents

Abstract

Smooth alignment according to the state of an eye to be examined is realized.
An optical system of an ophthalmologic apparatus according to an embodiment acquires data of an eye to be examined. The drive unit moves the optical system. The alignment optical system projects an alignment index onto the anterior segment. The two or more photographing units photograph the anterior eye part on which the index is projected from different directions. The first analysis unit specifies the position of the eye to be examined based on the index images in the two or more captured images acquired by the two or more imaging units. The second analysis unit specifies the position of the eye to be examined based on the feature positions in the two or more captured images acquired by the two or more imaging units. The alignment control unit selectively selects a first alignment mode for controlling the drive unit based on the position specified by the first analysis unit and a second alignment mode for controlling the drive unit based on the position specified by the second analysis unit. It is feasible. A 1st alerting | reporting part alert | reports the information which shows the alignment mode currently performed.
[Selection] Figure 1

Description

  The present invention relates to an ophthalmologic apparatus for optically acquiring data of an eye to be examined.

  The ophthalmologic apparatus includes an ophthalmologic measuring apparatus for measuring the characteristics of the eye to be examined and an ophthalmologic photographing apparatus for obtaining an image of the eye to be examined.

  Examples of ophthalmic measuring devices include an ocular refraction examination device (refractometer, keratometer) that measures the refractive properties of the eye to be examined, a tonometer, a specular microscope that obtains the properties of the cornea (corneal thickness, cell distribution, etc.) There is a wavefront analyzer that obtains aberration information of an eye to be examined using a Hartmann-Shack sensor.

  As an example of an ophthalmologic photographing apparatus, an optical coherence tomography using optical coherence tomography (OCT), an optical coherence tomograph that obtains a tomographic image, a fundus camera that photographs a fundus, or a fundus image by laser scanning using a confocal optical system There is a scanning laser ophthalmoscope (SLO) or the like.

  In an ophthalmic examination using such an apparatus, the alignment (alignment) between the optical system and the eye to be examined is important from the viewpoint of the accuracy and accuracy of the examination. In general, the alignment includes an operation of aligning the optical axis of the optical system with the axis of the eye to be examined (XY alignment), and an operation of adjusting the distance between the eye to be examined and the optical system to a predetermined working distance (Z alignment). is there.

  In Patent Document 1, the anterior eye part of the eye to be examined is photographed substantially simultaneously by two or more cameras, and based on the position of the characteristic part (pupil center, etc.) of the anterior eye part depicted in two or more photographed images. A technique for performing alignment is disclosed. Further, Patent Document 2 discloses a technique in which an anterior segment where a light beam is projected on the cornea is photographed from the front, and alignment is performed based on a bright spot image (Purkinje image) depicted in the obtained anterior segment image. Has been.

JP 2013-248376 A Japanese Patent Laying-Open No. 2015-85081

  Since the eye refractive power measurement by the refractometer is performed for prescription of spectacles or contact lenses, it is necessary to measure the eye refractive power with reference to the apex of the cornea. Similarly, in order to ensure the accuracy of corneal curvature measurement with a keratometer, alignment based on the corneal apex is necessary.

  There are individual differences in the form of the eye to be examined. For example, the distance from the corneal apex to the pupil and the eccentric state between the cornea and the pupil are different for each person. Conventional alignment based on the pupil is effective for an apparatus that acquires fundus data through the pupil, but is not effective in an apparatus that requires alignment accuracy with respect to the cornea, such as a refractometer and a keratometer.

  Further, in the conventional alignment based on the Purkinje image, since the eye to be examined is photographed from the front, the Z alignment state is determined from the focus state of the Purkinje image, and it takes time for the alignment.

  Furthermore, depending on the state of the eye to be examined, a Purkinje image cannot be obtained and alignment may not be performed. This problem occurs, for example, when there are diseases such as keratoconus and corneal erosion. In this case, alignment has to be performed manually.

  An object of the present invention is to realize smooth alignment according to the state of the eye to be examined.

  The ophthalmologic apparatus of the embodiment includes an optical system, a drive unit, an alignment optical system, two or more imaging units, a first analysis unit, a second analysis unit, an alignment control unit, and a first notification unit. Prepare. The optical system acquires data of the eye to be examined. The drive unit moves the optical system. The alignment optical system projects an index for performing alignment of the optical system with respect to the eye to be examined on the anterior eye portion of the eye to be examined. The two or more photographing units photograph the anterior eye part in a state where the index is projected substantially simultaneously from different directions. The first analysis unit specifies the position of the eye to be inspected based on the index images in the two or more captured images obtained by the two or more imaging units. The second analysis unit specifies the position of the eye to be examined based on the feature positions in the two or more captured images obtained by the two or more imaging units. The alignment control unit includes a first alignment mode for controlling the drive unit based on the position specified by the first analysis unit, and a second alignment mode for controlling the drive unit based on the position specified by the second analysis unit. Can be selectively executed. A 1st alerting | reporting part alert | reports the information which shows the alignment mode currently performed by the alignment control part.

  According to the ophthalmologic apparatus according to the embodiment, it is possible to realize smooth alignment according to the state of the eye to be examined.

It is the schematic showing the example of a structure of the ophthalmologic apparatus which concerns on embodiment. It is the schematic for demonstrating the example of operation | movement of the ophthalmologic apparatus which concerns on embodiment. It is the schematic for demonstrating the example of operation | movement of the ophthalmologic apparatus which concerns on embodiment. It is the schematic for demonstrating the example of operation | movement of the ophthalmologic apparatus which concerns on embodiment. It is the schematic for demonstrating the example of operation | movement of the ophthalmologic apparatus which concerns on embodiment. It is the schematic for demonstrating the example of operation | movement of the ophthalmologic apparatus which concerns on embodiment. It is the schematic for demonstrating the example of operation | movement of the ophthalmologic apparatus which concerns on embodiment. It is the schematic for demonstrating the example of operation | movement of the ophthalmologic apparatus which concerns on embodiment. It is a flowchart showing the example of operation | movement of the ophthalmologic apparatus which concerns on embodiment. It is the schematic showing the example of the information which the ophthalmologic apparatus which concerns on embodiment displays. It is the schematic showing the example of the information which the ophthalmologic apparatus which concerns on embodiment displays. It is the schematic showing the example of the information which the ophthalmologic apparatus which concerns on embodiment displays. It is the schematic showing the example of the information which the ophthalmologic apparatus which concerns on embodiment outputs. It is the schematic showing the example of the information which the ophthalmologic apparatus which concerns on embodiment displays.

  Several embodiments of the present invention will be described. The ophthalmologic apparatus of the embodiment may be any ophthalmic measurement apparatus, any ophthalmologic imaging apparatus, or any multi-function machine. Examples of the ophthalmologic measurement device include a refractometer, a keratometer, a visual function inspection device, and a tonometer. Examples of the ophthalmologic photographing apparatus include an OCT apparatus, a fundus camera, and an SLO.

<Constitution>
A configuration example of the ophthalmologic apparatus is shown in FIG. The ophthalmologic apparatus 1 has a function of acquiring data of the eye E, that is, a function of photographing the eye E and / or a function of measuring characteristics of the eye E.

  The ophthalmologic apparatus 1 includes a control unit 11, a data processing unit 12, an optical unit 20, a face support unit 70, a first moving mechanism 80A, a second moving mechanism 80B, a user interface (UI) 90, and an output. Part 95. Note that only one of the first moving mechanism 80A and the second moving mechanism 80B may be provided.

  Each of the control unit 11 and the data processing unit 12 includes a processor. The processor is, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an ASIC (Application Specific Integrated Circuit), a programmable logic device (for example, SPLD (Simple Programmable LD). (Field Programmable Gate Array)).

  For example, the processor implements the functions according to the embodiment by reading and executing a program stored in a storage circuit or a storage device. At least a part of the memory circuit or the memory device may be included in the processor. Further, at least a part of the memory circuit or the memory device may be provided outside the processor 10. Processing that can be executed by the processor will be described later.

  The storage device or the like stores various data. Data stored in the storage device or the like includes data (measurement data, imaging data, etc.) acquired by the measurement optical system 30, information on the subject and the eye to be examined, and the like. The storage device or the like may store various computer programs and data for operating the ophthalmologic apparatus 1. The storage device or the like stores various types of data that are used and referred to in processing that will be described later.

(Control unit 11)
The control unit 11 executes control of each unit of the ophthalmologic apparatus 1. In particular, the control unit 11 controls the data processing unit 12, the optical unit 20, the first moving mechanism 80A, the second moving mechanism 80B, the user interface 90, and the output unit 95. The control unit 11 includes an alignment control unit 111, a data control unit 112, and an output control unit 113.

(Alignment control unit 111)
The alignment control unit 111 executes control related to alignment. The ophthalmologic apparatus 1 can execute alignment (index alignment mode) based on an index projected on the anterior segment and alignment (pupil alignment mode) based on a characteristic part of the eye E. The alignment control unit 111 executes processing for selecting the alignment mode and control of the first moving mechanism 80A (and / or the second moving mechanism 80B) in the selected alignment mode. A specific example of processing executed by the alignment control unit 111 will be described later.

(Data control unit 112)
The data control unit 112 associates information indicating the applied alignment mode (alignment mode information) with the data of the eye E acquired after alignment. In the present embodiment, alignment information indicating the index alignment mode is associated with the data acquired in the state of alignment in the index alignment mode. Further, alignment information indicating the pupil alignment mode is associated with the data acquired in the state of alignment in the pupil alignment mode. The process of associating the alignment information with the data of the eye E is arbitrary. Typical examples of association will be described below, but the present invention is not limited to these.

  As a first example, alignment information can be included in the data of the eye E. For example, alignment information can be embedded in image data, or alignment information can be embedded in a part of measurement data.

  As a second example, alignment information can be added to the data of the eye E. For example, alignment information can be recorded on a DICOM tag of image data, or alignment information can be attached to measurement data in a predetermined format.

  As a third example, it is possible to associate the data of the eye E with the alignment information using predetermined information. For example, the alignment information can be recorded on the electronic medical record, and the image data can be stored in the image archiving apparatus and associated with each other using the patient ID, the photographing date information, and the like.

(Output control unit 113)
The output control unit 113 executes control for outputting information. The information output mode is arbitrary, and typical examples include display output, audio output, print output, lighting of a light emitting diode, and the like. In the example illustrated in FIG. 1, the output control unit 113 performs control of the display unit 91 of the user interface 90 and control of the output unit 95. A specific example of processing executed by the output control unit 113 will be described later.

(Data processing unit 12)
The data processing unit 12 executes various data processing. In particular, the data processing unit 12 analyzes an image acquired by the anterior segment camera 60. The data processing unit 12 includes a first analysis unit 13 and a second analysis unit 14. These operations will be described later.

(Optical unit 20)
The optical unit 20 stores a configuration for measuring and / or photographing the eye E and a configuration for preparing the same. The former includes the measurement optical system 30 and the latter includes the alignment optical system 40. The optical path of the alignment optical system 40 is combined with the optical path of the measurement optical system 30 by the beam splitter 50. Although not shown, various optical members such as an objective lens are provided between the beam splitter 50 and the eye E to be examined.

  Two or more anterior eye cameras 60 are provided at different positions. In the example shown in FIG. 1, it is provided at a position off the optical path of the measurement optical system 30 or the like, but is not limited to this. For example, when the measurement optical system 30 is provided with an image sensor, one of the two or more anterior segment cameras may be the image sensor.

  In addition to the configuration shown in FIG. 1, the optical unit 20 may be provided with an optical system (observation optical system, imaging optical system, etc.) for imaging the eye E from the front. Further, a configuration for performing focusing of the measurement optical system 30 may be provided. The optical unit 20 may include a light source (anterior eye illumination light source) for illuminating the anterior eye portion of the eye E to be examined.

(Measurement optical system 30)
The measurement optical system 30 includes a configuration for measuring the characteristics of the eye E and / or a configuration for photographing the eye E. The measurement optical system 30 is configured according to the functions (measurement function, imaging function, etc.) provided by the ophthalmologic apparatus 1. The measurement optical system 30 includes a light source, an optical element (an optical member, an optical device), an actuator, a mechanism, a circuit, a display device, a light receiving element, an image sensor, and the like. The configuration of the measurement optical system 30 may be the same as that of a conventional ophthalmic apparatus. At least a part of the measurement optical system 30 may be disposed outside the optical path combined with the alignment optical system 40. For example, when a keratometer function for measuring the corneal curvature is provided, a light source (keratring light source) for projecting a ring-shaped light beam or a concentric light beam onto the cornea is disposed immediately before the eye E to be examined.

  The measurement optical system 30 may include a configuration for providing a function associated with the inspection. For example, a fixation optical system for projecting a target (fixation target) for fixing the eye E on the fundus of the eye E may be provided.

(Alignment optical system 40)
The alignment optical system 40 projects the light beam onto the eye E. Thereby, an index for alignment is projected onto the anterior segment. This index is detected as a Purkinje image, for example. The alignment using the index is, for example, a Z alignment in the optical axis direction (Z direction) of the measurement optical system 30 and an XY alignment in the X direction (horizontal direction) and the Y direction (vertical direction) orthogonal to the Z direction. At least one of the above.

  The Z alignment is performed by analyzing two or more captured images obtained substantially simultaneously by two or more anterior eye cameras 60. The XY alignment is performed by analyzing two or more captured images obtained substantially simultaneously by two or more anterior eye cameras 60, or an optical system for observing the eye E from the front (observation optical system, This is executed by analyzing an image (front image of the anterior eye portion) obtained by a photographing optical system or the like. The front image is acquired using, for example, an image sensor provided in the measurement optical system 30.

  The XY alignment based on the front image of the anterior segment is executed based on the position in the XY direction of the Purkinje image (index image) drawn on the front image, as in the conventional case. For example, the XY alignment based on the front image of the anterior eye part is executed by moving the optical unit 20 manually or automatically so as to guide the index image within an allowable range of alignment deviation (alignment mark). In the case of manual alignment, the output control unit 113 displays the front image and the alignment mark on the display unit 91, and the user operates the operation unit 92 so that the above conditions are satisfied. In the case of auto alignment, the data processing unit 12 calculates the displacement of the index image with respect to the alignment mark, and the alignment control unit 111 moves the optical unit 20 in the XY directions so as to cancel this displacement.

(Anterior eye camera 60)
As described above, two or more anterior eye cameras 60 are provided at different positions. Each anterior eye camera 60 is, for example, a video camera that performs moving image shooting at a predetermined frame rate. The two or more anterior segment cameras 60 photograph the anterior segment substantially simultaneously from different directions.

  In this embodiment, as shown in FIG. 2, two anterior eye cameras 60A and 60B are provided. 2 is a top view, and the + Y direction indicates a vertically upward direction, and the + Z direction indicates the optical axis direction of the measurement optical system 30 and the direction from the measurement optical system 30 toward the eye E. FIG. Further, the anterior eye cameras 60 </ b> A and 60 </ b> B are provided at positions deviating from the optical path of the measurement optical system 30. In the present embodiment, the anterior eye cameras 60 </ b> A and 60 </ b> B are provided below the optical path of the measurement optical system 30. Thereby, the reflected light of the light beam (index) projected onto the cornea is less likely to vignetting the eyelashes or eyelids. Hereinafter, the two anterior eye cameras 60 </ b> A and 60 </ b> B may be collectively represented by reference numeral 60.

  The number of the anterior segment camera may be an arbitrary number of 2 or more as long as the anterior segment can be photographed substantially simultaneously from two different directions. One anterior eye camera may be arranged coaxially with the measurement optical system 30.

  “Substantially simultaneously” indicates that, for example, in photographing with two or more anterior segment cameras, a deviation in photographing timing that allows negligible eye movement is allowed. Thereby, an image when the eye E is substantially at the same position (orientation) can be acquired by two or more anterior segment cameras.

  In addition, although shooting with two or more anterior eye cameras may be moving image shooting or still image shooting, this embodiment will specifically describe the case of moving image shooting. In the case of moving image shooting, the above-described substantially simultaneous anterior ocular shooting can be realized by controlling the shooting start timing to match or by controlling the frame rate and shooting timing of each frame. On the other hand, in the case of still image shooting, this can be realized by controlling to match the shooting timing.

(Face support part 70)
The face support unit 70 includes a member for supporting the subject's face. For example, the face support unit 70 includes a forehead pad on which the subject's forehead abuts and a chin rest on which the subject's chin is placed. The face support unit 70 may include only one of the forehead support and the chin rest, or may include other members.

(Movement mechanisms 80A and 80B)
The moving mechanism 80A moves the optical unit 20 under the control of the control unit 11 (alignment control unit 111 or the like). The moving mechanism 80A can move the optical unit 20 three-dimensionally. The moving mechanism 80A includes, for example, a mechanism for moving the optical unit 20 in the X direction, a mechanism for moving in the Y direction, and a mechanism for moving in the Z direction, as in the conventional case. Further, the moving mechanism 81A may include a rotation mechanism that rotates the optical unit 20 in a plane (horizontal plane, vertical plane, etc.) including the optical axis of the optical unit 20.

  The moving mechanism 80B moves the face support unit 70 under the control of the control unit 11 (alignment control unit 111 or the like). The moving mechanism 80B can move the face support part 70 three-dimensionally. The moving mechanism 80B includes, for example, a mechanism for moving the face support unit 70 in the X direction, a mechanism for moving in the Y direction, and a mechanism for moving in the Z direction. Further, the moving mechanism 81B may include a rotation mechanism for changing the direction of the face support unit 70 (or a member included therein). When a plurality of members are provided on the face support unit 70, the moving mechanism 80B may be configured to move these members individually. For example, the moving mechanism 80B may be configured to move the forehead rest and the chin rest individually. As described above, generally, at least one of the moving mechanisms 80A and 80B is provided.

(User interface 90)
The user interface 90 provides functions for exchanging information between the ophthalmologic apparatus 1 and the user, such as information display, information input, and operation instruction input. The user interface 90 provides an output function and an input function.

  A display unit 91 is a typical example of a configuration that provides an output function. The display unit 91 includes a display device such as a flat panel display. Other examples of the configuration related to the output function include an audio output device and a light emitting diode. The output function is controlled by the output control unit 113.

  A typical example of a configuration that provides an input function is an operation unit 92. The operation unit 92 includes operation devices such as a lever, a button, a key, and a pointing device. Other examples of the configuration related to the input function include a microphone and a data writer.

  The user interface 90 may include a device in which an output function and an input function such as a touch panel display are integrated. The user interface 90 may include a graphical user interface (GUI) for inputting and outputting information.

(Output unit 95)
The output unit 95 includes a configuration for outputting information to the outside of the ophthalmologic apparatus 1. Typical examples include a printing apparatus, a data writer for writing to a recording medium, and a communication apparatus for transmitting data to an external apparatus (computer, ophthalmic apparatus, etc.). Note that at least a part of the output unit 95 may be included in the user interface 90.

(Details of the data processing unit 12)
Details of the data processing unit 12 will be described. As described above, the data processing unit 12 includes the first analysis unit 13 and the second analysis unit 14.

(First analysis unit 13)
The first analysis unit 13 specifies the position of the eye E based on index images in two or more captured images obtained by the anterior eye cameras 60A and 60B. An example of processing executed by the first analysis unit 13 will be described. In the present embodiment, the first analysis unit 13 includes, for example, an index image detection unit 131 and a position specifying unit 132.

(Index Image Detection Unit 131)
The index image detection unit 131 detects an index image drawn on each captured image by analyzing two or more captured images obtained substantially simultaneously by the anterior eye cameras 60A and 60B. When the anterior eye cameras 60A and 60B perform moving image shooting, the index image detection unit 131 detects an index image from each frame. The index image detection unit 131 detects the index image by analyzing the pixel value of the captured image. When the captured image is a luminance image, the index image detection unit 131 identifies an image region (pixel) corresponding to the index image based on the distribution of luminance values in the captured image. This process includes, for example, a process of selecting a pixel having a luminance value higher than a predetermined threshold value. When the captured image is a color image, the index image detection unit 131 includes, for example, processing for selecting a pixel having a luminance value higher than a predetermined threshold, or processing for selecting a pixel representing a predetermined color.

(Position specifying unit 132)
The position specifying unit 132 specifies the position of the eye E based on the two index images detected by the index image detecting unit 131. The position specifying unit 132 calculates at least the distance between the eye E and the measurement optical system 30 in the Z direction. Based on this calculation result, Z alignment is executed. Further, the position specifying unit 132 may calculate the displacement between the eye E and the measurement optical system 30 in the XY directions. XY alignment is executed based on this calculation result.

  Processing executed by the position specifying unit 132 will be described with reference to FIG. FIG. 2 is a top view showing the positional relationship between the eye E and the anterior eye cameras 60A and 60B. The distance (baseline length) between the two anterior eye cameras 60A and 60B in the XY directions is represented by “B”. A distance (index image distance) between the baselines of the two anterior eye cameras 60A and 60B and the index image P is represented by “H”. The distance (screen distance) between each anterior eye camera 60A and 60B and the screen plane is represented by “f”. In general, when the index beam is projected as a parallel beam onto the eye E, the index image (Purkinje image) P is displaced from the corneal surface in the + Z direction by a half of the corneal curvature radius of the eye E. It is formed.

  In such an arrangement state, the resolution of images taken by the anterior eye cameras 60A and 60B is expressed by the following equation. Here, Δp represents pixel resolution.

Resolution in the XY direction: ΔXY = H × Δp / f
Resolution in the Z direction: ΔZ = H × H × Δp / (B × f)

  The position specifying unit 132 has an arrangement relationship shown in FIG. 2 (and FIG. 1) with respect to the positions (known) of the two anterior eye cameras 60A and 60B and the position of the index image P in the two captured images. The position of the index image P, that is, the position of the eye E to be examined is specified by applying a known trigonometric method that takes into account the above. The specified position includes at least a position in the Z direction, and may further include a position in the XY direction.

  The position of the eye E to be examined specified by the position specifying unit 132 is sent to the control unit 11. Based on the Z position of the eye E, the alignment control unit 111 sets the drive mechanisms 80A and / or 80B so that the distance between the eye E and the measurement optical system 30 in the Z direction matches a predetermined working distance. Control. Further, the alignment control unit 111 controls the drive mechanisms 80A and / or 80B so that the optical axis of the measurement optical system 30 and the axis of the eye E are matched based on the XY position of the eye E. The working distance (working distance) is a distance between the eye E and the measurement optical system 30 set in advance to perform measurement by the measurement optical system 30.

  As described above, the first analysis unit 13 can obtain the position of the index image P (Purkinje image) as the position of the eye E (the approximate position). Further, the first analysis unit 13 can determine the position of the cornea (vertex) of the eye E based on the position of the identified index image P and the separately measured corneal curvature radius. In a state where the XYZ alignment is in alignment, the corneal apex is considered to be arranged at a position displaced from the index image P by a half of the corneal curvature radius in the −Z direction. Therefore, by subtracting a half value of the corneal curvature radius from the Z coordinate value of the index image P, the Z coordinate value (XYZ coordinate value including the corneal vertex) of the cornea can be estimated.

  The corneal curvature radius is measured using a keratometer, a corneal topographer, or an anterior segment OCT. When the ophthalmologic apparatus 1 does not have a function of measuring the corneal curvature radius, a measured value of the corneal curvature radius obtained in the past is input to the ophthalmic apparatus 1. The 1st analysis part 13 can obtain | require a corneal vertex position using this measured value. On the other hand, when the ophthalmologic apparatus 1 has a function of measuring the corneal curvature radius, for example, the corneal curvature radius is measured after the alignment is performed, and the alignment is performed again using the obtained measurement value. it can. Even if the ophthalmologic apparatus 1 has a function of measuring the corneal curvature radius, it is possible to use a measured value of the corneal curvature radius obtained in the past.

(Other processing example of the first analysis unit 13)
Another example of processing for specifying the position of the eye E based on two captured images obtained by the anterior eye cameras 60A and 60B will be described.

  In FIG. 3A, the left diagram shows a state in which the XYZ alignment is matched, and the right diagram shows two captured images obtained at that time. When all the alignments of XYZ match the index image P, that is, the position where the optical axis of the right anterior eye camera 60A and the optical axis of the right anterior eye camera 60B intersect (optical axis crossing position). ), The captured image GA is obtained by the right anterior eye camera 60A, and the captured image GB is obtained by the left anterior eye camera 60B. In the captured image GA, the index image PA is arranged on (or in the vicinity of) the center position AC in the left-right direction in the frame. Similarly, in the captured image GB, the index image PB is arranged on the center position BC (or the vicinity thereof) in the horizontal direction in the frame.

  FIG. 3B shows a case where the eye E is too close to the ophthalmologic apparatus 1, that is, a case where the index image P is located closer to the ophthalmologic apparatus 1 than the optical axis crossing position. In the captured image GA obtained by the right anterior eye camera 60A, the index image PA is arranged on the right side of the center position AC. On the other hand, in the captured image GB obtained by the left anterior eye camera 60B, the index image PB is arranged on the left side of the center position BC. That is, the interval between the two index images PA and PB in the two captured images GA and GB is widened.

  Conversely, FIG. 3C shows a case where the eye E is too far away from the ophthalmologic apparatus 1. In the captured image GA obtained by the right anterior eye camera 60A, the index image PA is arranged on the left side of the center position AC. On the other hand, in the captured image GB obtained by the left anterior eye camera 60B, the index image PB is arranged on the right side of the center position BC. That is, the interval between the index images PA and PB in the two captured images GA and GB is narrowed.

  Thus, the relative positions of the two index images PA and PB in the two captured images GA and GB change according to the state of the Z alignment. The shift direction (proximity / distant) of the Z alignment appears as a change direction (interval increase / interval decrease) of the relative positions of the two index images PA and PB. Further, the amount of deviation of the Z alignment appears as a change amount of the relative position between the two index images PA and PB.

  Information representing this relationship is stored in advance in the first analysis unit 13 (or the control unit 11 or the like). In this information, for example, the relative position (interval) of the two index images is associated with the shift direction and the shift amount of Z alignment. The index image detection unit 131 detects the index images PA and PB by analyzing the captured images GA and GB, respectively. The position specifying unit 132 obtains the positions (relative positions) of the two index images PA and PB detected by the index image detecting unit 131. Further, the position specifying unit 132 obtains the Z alignment shift direction and shift amount corresponding to the positions of the two obtained index images PA and PB with reference to the storage information.

  4A, as in FIG. 3A, the left diagram shows a state in which the XYZ alignment is matched, and the right diagram shows two photographed images obtained at that time.

  FIG. 4B shows a case where the eye E to be examined is displaced to the right with respect to the anterior eye cameras 60A and 60B, that is, the index image P is located on the right side of the optical axis crossing position of the anterior eye cameras 60A and 60B. Indicates. In the captured image GA obtained by the right anterior eye camera 60A, the index image PA is arranged on the left side of the center position AC. Similarly, in the captured image GB obtained by the left anterior eye camera 60B, the index image PB is arranged on the left side of the center position BC. That is, the interval between the two index images PA and PB in the two captured images GA and GB is not substantially changed, and these are displaced to the left by substantially the same distance.

  Conversely, FIG. 4C shows a case where the eye E is displaced to the left with respect to the anterior eye cameras 60A and 60B. In the captured image GA obtained by the right anterior eye camera 60A, the index image PA is arranged on the right side of the center position AC. Similarly, in the captured image GB obtained by the left anterior eye camera 60B, the index image PB is arranged on the right side of the center position BC. That is, the interval between the two index images PA and PB in the two captured images GA and GB is not substantially changed, and these are displaced to the right by substantially the same distance.

  Thus, according to the state of the X alignment, the two index images PA and PB in the two captured images GA and GB are displaced by a substantially equal distance in the same direction. The X alignment misalignment direction (right / left) appears as an integral displacement direction of the two index images PA and PB. Further, the amount of deviation of the X alignment appears as an integral displacement amount of the two index images PA and PB.

  Information representing this relationship is stored in advance in the first analysis unit 13 (or the control unit 11 or the like). In this information, for example, the displacement (displacement direction and displacement amount) of the two index images with respect to the frame center in the left-right direction is associated with the displacement direction and displacement amount of the X alignment. The index image detection unit 131 detects the index images PA and PB by analyzing the captured images GA and GB, respectively. The position specifying unit 132 obtains the positions of the two index images PA and PB detected by the index image detecting unit 131, and obtains the displacement direction and the displacement amount with respect to the center positions AC and BC. Then, the position specifying unit 132 obtains the displacement direction and displacement amount of the X alignment corresponding to the displacement direction and displacement amount of the obtained two index images PA and PB with reference to the stored information.

  Similarly, the Y alignment displacement is calculated based on the correspondence between the vertical displacement (displacement direction and displacement amount) of the two index images relative to the frame center and the Y alignment displacement direction and displacement amount. Is done.

(Second analysis unit 14)
The second analysis unit 14 specifies the position of the eye to be examined based on the feature positions in the two or more captured images obtained by the anterior eye camera 60A and 60B. The characteristic position is the position of the characteristic part of the eye E. An example of processing executed by the second analysis unit 14 will be described. In the present embodiment, the second analysis unit 14 includes, for example, a feature position detection unit 141 and a position specification unit 142.

  As disclosed in JP 2013-248376 A, the ophthalmologic apparatus 1 can execute alignment based on the position of the characteristic part of the anterior segment. Data processing for this purpose is executed by the second analysis unit 14.

  The feature position detection unit 141 identifies a feature position corresponding to a feature part of the anterior segment by analyzing each of the two captured images obtained substantially simultaneously by the anterior segment cameras 60A and 60B. The characteristic part of the anterior segment is, for example, the center of the pupil (pupil center of gravity).

  The position specifying unit 142 specifies the position of the eye E based on the feature position specified by the feature position detecting unit 141.

  In this example, the position of the pupil center represents the position of the eye E. The position of the corneal apex by using the distance between the corneal apex and the pupil in the eye E or the distance between the corneal apex and the pupil in a standard eye (model eye, average value, etc.) As the position of the eye E to be examined. The distance in the eye E is measured using, for example, OCT or an ultrasonic measurement device.

  The 2nd analysis part 14 may be able to perform the process similar to the process of the 1st analysis part 13 demonstrated with reference to FIG. 3A-FIG. 4C. In this case, the center of the pupil (or other feature position) is used instead of the index image P in FIGS. 3A to 4C.

<Operation>
The operation of the ophthalmologic apparatus 1 will be described. An example of the operation of the ophthalmologic apparatus 1 is shown in FIG.

(S1: Start index projection and anterior segment imaging)
The alignment control unit 111 controls the alignment optical system 40 so that an instruction for starting the alignment is given by the user or the control unit 11, so that an index for alignment is an anterior segment of the eye E to be examined. To project.

  In addition, the control unit 11 controls the anterior eye cameras 60 </ b> A and 60 </ b> B to start acquisition of a moving image of the anterior eye part. The anterior eye cameras 60A and 60B form captured images (frames) at a predetermined frame rate. The captured images are sequentially input to the data processing unit 12.

  The projection of the index is continued until, for example, the end of the index alignment (end of alignment or switching to pupil alignment). Anterior segment imaging is continued until, for example, the end of alignment.

(S2: Was the index image detected?)
The index image detection unit 131 of the first analysis unit 13 analyzes each of the two captured images GA and GB obtained substantially simultaneously by the anterior eye cameras 60A and 60B in order to detect an index image. If an index image is not detected from at least one of the two captured images GA and GB (S2: NO), the process proceeds to step S5. Conversely, when an index image is detected from both of the two captured images GA and GB (S2: YES), the process proceeds to step S3.

  For example, one of the following can be applied to determine whether or not an index image has been detected. In the first example, it is determined whether or not an index image is included in the captured image GA (GB). That is, whether or not the index image is extracted from the captured image GA (GB) is a determination criterion. In the second example, it is determined whether or not an index image is included in a predetermined range in the captured image GA (GB). That is, whether or not the index image is extracted by searching within a predetermined range of the captured image GA (GB) is a determination criterion. The predetermined range is, for example, a region near the center of the frame of the captured image, and its position and size are set in advance (may be the same as that of a conventional ophthalmologic apparatus).

(S3: Index alignment mode)
When an index image is detected from both of the two captured images GA and GB in step S2 (S2: YES), the alignment control unit 111 starts control for the index alignment mode. The ophthalmologic apparatus 1 according to the present embodiment repeatedly executes the following series of processes based on a pair of captured images GA and GB (a pair of frames) acquired sequentially by the anterior eye cameras 60A and 60B.

  First, the index image detection unit 131 of the first analysis unit 13 detects the index images PA and PB by analyzing each of the captured images GA and GB. Next, the position specifying unit 132 specifies the position of the eye E based on the index images PA and PB detected by the index image detecting unit 131. Subsequently, the alignment control unit 111 controls the first drive mechanism 80A (and / or the second drive mechanism 80B) based on the position of the eye E to be examined specified by the position specifying unit 132. In this control, for example, the optical unit 20 (and / or the face support) is canceled so that the displacement between the specified position of the eye E to be examined and the center position of the predetermined range representing the allowable range of alignment deviation is canceled. Part 70) is moved.

  Further, with the start of the index alignment mode, the output control unit 113 causes the display unit 91 to display information (alignment mode information) indicating the index alignment mode that is the current alignment mode. An example of information displayed in the step S3 is shown in FIG. 6A.

  The output control unit 113 displays the window 200 on the display unit 91. In the window 200, an alignment information display area 210 and an anterior segment image 220 are displayed. The alignment information display area 210 displays alignment information. In the stage of step S3, for example, a character string “CORNEA” representing an index alignment mode (corneal reference alignment mode) executed on the basis of the cornea using an index projected on the anterior segment is displayed as the alignment information 210a. Is done. Note that alignment information provided for each alignment mode is stored in advance in the storage device or the like of the control unit 11.

  The anterior segment image 220 is an image acquired by at least one of the anterior segment cameras 60A and 60B, or an image based on it. For example, an image obtained by one of the anterior eye cameras 60A and 60B or an image obtained by processing the image can be displayed. Also, a pair of images acquired substantially simultaneously by the anterior eye cameras 60A and 60B can be displayed side by side, or a composite image of the pair of images can be displayed. The anterior segment image 220 may be a still image or a moving image.

  The anterior eye image 220 includes an index image 223 in addition to the iris image 221 and the pupil image 222 of the eye E. The index image 223 is an index image (PA and / or PB) detected from at least one of a pair of images acquired substantially simultaneously by the anterior eye cameras 60A and 60B, or an image based on them. . An example of the latter is a mark indicating the position of the index image.

  The method for notifying the current alignment mode is not limited to the display of alignment information. For example, when a light emitting diode or the like for each alignment mode is provided in the housing or the like of the ophthalmologic apparatus 1, the output control unit 113 can turn on the light emitting diode corresponding to the current alignment mode. When a single light emitting diode is provided, the output control unit 113 can turn on the light emitting diode in a mode (color, blinking, etc.) corresponding to the current alignment mode. When an audio output device is provided, the output control unit 113 can cause the audio output device to output audio information corresponding to the current alignment mode. It is also possible to combine two or more notification methods as exemplified here.

(S4: Alignment OK?)
The operation in step S3 is repeatedly executed until alignment is achieved (S4: NO). If the alignment is successful (S4: YES), the process proceeds to step S13.

  The determination of whether or not the alignment is correct is performed by determining whether or not the index image detected after the optical unit 20 is moved is included in the predetermined range, for example. In this case, when the index image is not included in the predetermined range, the alignment operation is performed again, and the process proceeds to step S13 in response to the index image being included in the predetermined range.

  Note that it is possible to output a warning or to shift to manual alignment in response to the number of repetitions reaching a predetermined number or when the repetition process has continued for a predetermined time.

(S5: detect pupil image)
When the index image is not detected in step S2 (S2: NO), the feature position detection unit 141 of the second analysis unit 14 has a pair of captured images GA obtained substantially simultaneously by the anterior eye cameras 60A and 60B. A pupil image is detected by analyzing each of GB and GB.

(S6: Was a pupil image detected?)
If a pupil image is detected in step S5 (S6: YES), the process proceeds to step S8. On the other hand, when no pupil image is detected in step S5 (S6: NO), the process proceeds to step S7. Causes of the pupil image not being detected include blinking, eye movement, or misalignment so that the anterior segment of the eye E is not within the imaging range.

(S7: Manual alignment)
If no pupil image is detected in step S6 (S6: NO), the output control unit 113 causes the display unit 91 to display information for shifting to manual alignment. For example, the output control unit 113 can display a message that the pupil is not detected or a message that instructs the optical unit 20 and / or the face support unit 70 to move so that the pupil is photographed. When manual alignment is started, the process returns to step S2.

(S8: Pupil alignment mode)
When a pupil image is detected in step S6 (S6: YES), the alignment control unit 111 starts control for the pupil alignment mode. The ophthalmologic apparatus 1 according to the present embodiment repeatedly executes the following series of processes based on a pair of captured images GA and GB (a pair of frames) acquired sequentially by the anterior eye cameras 60A and 60B.

  First, the feature position detector 141 of the second analyzer 14 detects the center of the pupil by analyzing each of the captured images GA and GB. Next, the position specifying unit 142 specifies the position of the eye E based on the pair of pupil centers detected by the feature position detecting unit 141. Subsequently, the alignment control unit 111 controls the first drive mechanism 80A (and / or the second drive mechanism 80B) based on the position of the eye E to be examined specified by the position specifying unit 142. In this control, for example, the optical unit 20 (and / or the face support) is canceled so that the displacement between the specified position of the eye E to be examined and the center position of the predetermined range representing the allowable range of alignment deviation is canceled. Part 70) is moved.

  Moreover, with the start of the pupil alignment mode, the output control unit 113 causes the display unit 91 to display information (alignment mode information) indicating the pupil alignment mode that is the current alignment mode. An example of information displayed in the step S8 is shown in FIG. 6B.

  The window 200 of FIG. 6B is the same window as the window 200 of FIG. 6A, but the display content is different. In the alignment information display area 210 of the window 200 shown in FIG. 6B, a character string “PUPIL” representing the pupil alignment mode executed with reference to the feature position (pupil center) in the anterior segment image is displayed as the alignment information 210b. Is done.

  The alignment information can also be displayed on the anterior segment image 220. In the example shown in FIG. 6B, an annular image 224a showing the outline of the pupil image and a cross-shaped image 224b showing the center of the pupil are overlaid on the anterior eye image 220.

  As in the case described above, the current alignment mode (pupil alignment mode) can be notified using a method (for example, a light emitting diode or an audio output device) other than the display of alignment information.

(S9: Alignment OK?)
If the alignment in step S8 has failed (S9: NO), the process proceeds to step S7, and the same processing as described above is executed. On the other hand, if the alignment in step S8 is successful (S9: YES), the process proceeds to step S10.

  The determination of whether or not the alignment is correct is performed by determining whether or not the pupil center detected after the movement of the optical unit 20 is included in the predetermined range, for example. In this case, for example, the alignment operation is repeatedly executed so that the pupil center is included in the predetermined range. Then, when the number of repetitions reaches a predetermined number or when the repetition process continues for a predetermined time, it is determined that the alignment has failed (S9: NO), and the process proceeds to manual alignment in step S7.

(S10: Has the index image been detected?)
If the alignment in step S8 fails (S9: NO), the alignment control unit 111 sends the two captured images GA and GB obtained substantially simultaneously by the anterior eye cameras 60A and 60B to the first analysis unit 13. . The index image detection unit 131 analyzes each of the captured images GA and GB in order to detect an index image.

  When an index image is detected from both the captured images GA and GB (S10: YES), the process proceeds to step S3 and alignment in the index alignment mode is executed. On the other hand, when the index image is not detected from one of the captured images GA and GB (S10: NO), the process proceeds to step S11. The determination as to whether or not the index image has been detected is executed, for example, in the same manner as in step S2.

(S11: Select pupil alignment?)
When the index image is not detected in step S10 (S10: NO), the output control unit 113 displays information for allowing the user to select whether or not to perform measurement in the alignment state achieved by the pupil alignment mode. 91.

  When the pupil alignment mode is selected (S11: YES), the alignment in the pupil alignment mode is continued as it is, and the process proceeds to step S13 after the completion. Conversely, when the pupil alignment mode is not selected (S11: NO), the process proceeds to step S12.

  An example of the information displayed in step S11 is shown in FIG. 6C. The window 200 of FIG. 6C is the same window as the window 200 of FIGS. 6A and 6B, but the display content is different. As in the case of FIG. 6B, in the alignment information display area 210, the character string “PUPIL” representing the pupil alignment mode is displayed as the alignment information 210b, but the display mode is different. For example, in FIG. 6C, the alignment information display area 210 and the alignment information 210b are blinked to prompt the user to select an alignment mode.

  The alignment information can also be displayed on the anterior segment image 220. In the example shown in FIG. 6C, a frame-like image 225 representing the index image search range is displayed in an overlay manner. Further, a message 226 is displayed indicating that the index image has not been detected in step S10, that is, the position of the corneal apex of the eye E has not been detected.

  It is possible to prompt the user to select an alignment mode using a method other than these. For example, a voice message for that purpose can be output to the voice output device.

  The user operates the operation unit 92 to specify whether or not to select the pupil alignment mode based on the information displayed on the display unit 91. For example, when the window 200 of FIG. 6C is displayed on the touch panel display, the user can select the pupil alignment mode by tapping (touching) the alignment information display area 210 that is blinking. When the pupil alignment mode is not selected, for example, another touch operation (for example, swipe) can be performed.

(S12: Manual alignment)
If the pupil alignment mode is not selected in step S11 (S11: NO), manual alignment is executed in the same manner as in step S7. After the manual alignment is completed, the process proceeds to step S13.

(S13: Measurement)
When the alignment in the index alignment mode is completed in step S4 (S4: YES), the pupil alignment mode is selected in step S11 and the alignment is completed (S11: YES), or the manual alignment in step S12 is completed The control unit 11 executes a preparatory operation such as focusing as necessary, and controls the measurement optical system 30 to execute measurement (imaging) of the eye E.

(S14: Accompanying alignment mode information)
When the measurement of the eye E is completed, the data control unit 112 associates information (alignment mode information) indicating the alignment mode applied immediately before this measurement with the data acquired by this measurement.

  When the measurement in step S13 is performed after the alignment in the index alignment mode is completed in step S4, the alignment mode information indicating the index alignment mode is associated with the measurement data. Further, when the measurement in step S13 is performed after the pupil alignment mode is selected in step S11 and the alignment is completed, the alignment mode information indicating the pupil alignment mode is associated with the measurement data. When the measurement in step S13 is performed after the manual alignment in step S12 is completed, the alignment mode information indicating the manual alignment mode is associated with the measurement data.

(S15: Display measurement data)
The output control unit 113 causes the display unit 91 to display the measurement data acquired in step S13 and information based on the alignment mode information attached thereto.

  For example, when imaging of the eye E is performed in step S13, an image acquired thereby and information (character string or the like) indicating the alignment mode applied immediately before imaging can be displayed. Further, when the characteristic of the eye E is measured in step S13, the measurement value, map, etc., and information (character string etc.) indicating the alignment mode applied immediately before the measurement can be displayed.

  In addition, the result obtained by analyzing the data of the eye E to be examined acquired in step S13 by the data processing unit 12 and information (character string or the like) indicating the alignment mode applied immediately before measurement or imaging are displayed. Can be made. For example, when OCT of the fundus is performed in step S13, the data processing unit 12 can obtain the retinal thickness distribution by analyzing the acquired OCT data. Then, the output control unit 113 can display the map representing the retinal thickness distribution on the display unit 91 together with information (character string or the like) indicating the alignment mode applied immediately before photographing.

(S16: Output measurement data)
The output control unit 113 controls the output unit 95 to output the measurement data acquired in step S13 together with the alignment mode information attached in step S14.

  For example, when the output unit 95 includes a printing device, alignment mode information (such as a character string) can be printed on paper with measurement data. An example of information to be printed is shown in FIG. Reference numeral 300 denotes a printing sheet. The printing paper 300 has, in order from the top, a letter “R” indicating that the measurement target is the right eye, a character string “REF” indicating a measurement result by the refractometer, and a measured value of the sphericity (S). , Measured value of astigmatism degree (C), measured value of astigmatism axis (A), character string “KRT” indicating measurement result by keratometer, measured value of weak main meridian (R1), strong main meridian (R2) ) Measurement value, angle (A) measurement value, letter “L” indicating that the object to be measured is the left eye, character string “REF” indicating the measurement result by the refractometer, and so on. Is printed.

  On the right side of the character string “REF” of the right eye “R”, the character string “ALIGNMENT: PUPIL” as the alignment mode information 310 is printed. This represents that the right eye reflex measurement was performed by applying the pupil alignment mode. Similarly, the character string “ALIGNMENT: PUPIL” as the alignment mode information 320 is printed on the right side of the character string “KRT” of the right eye “R”. This represents that the right eye kerato measurement was performed by applying the pupil alignment mode. A character string “ALIGNMENT: CORNEA” as the alignment mode information 330 is printed on the right side of the character string “REF” of the left eye “L”. This represents that the left eye reflex measurement was performed by applying the corneal reference alignment mode (index alignment mode).

  When the output unit 95 includes a data writer, the alignment mode information can be written to the recording medium together with the measurement data. Moreover, when the output part 95 contains a communication apparatus, alignment mode information can be transmitted to an external apparatus with measurement data. This is the end of the processing of this operation example (end).

<Other operation examples>
Another example of the operation of the ophthalmologic apparatus 1 will be described.

  The alignment mode can be selected according to the type of inspection (measurement, imaging, etc.) to be performed. For example, the index alignment mode can be selected when kerato measurement is performed that requires alignment accuracy with respect to the corneal apex. Further, when reflex measurement is performed in which a light beam is projected onto the fundus through the pupil, the pupil alignment mode can be selected.

  In such a case, the measurement optical system 30 is configured to be able to acquire two or more types of data. That is, the measurement optical system 30 is configured to be able to perform two or more types of measurements. The type of measurement to be performed is specified manually or automatically. For the manual designation, for example, the user interface 90 is used. As an example of automatic designation, there may be a case where one or more measurement types (and their order) are determined in advance, such as a medical checkup or clinical path. When one or more measurement types are assigned in advance for each disease type, the control unit 11 or the like can select the measurement type corresponding to the disease type input from the electronic medical record or the like. When the measurement type is determined, the control unit 11 (alignment control unit 111 or the like) can select an alignment mode corresponding to the measurement type.

  Alternatively, the output control unit 113 can cause the display unit 91 to display a window 400 as shown in FIG. In the alignment information display area 410 of the window 400, a character string “PUPIL” representing the pupil alignment mode is displayed as the alignment information 411. In order to prompt the user to select an alignment mode, the alignment information display area 410 and the alignment information 411 are blinked.

  In addition, a frame-shaped image 430 representing the index image search range is displayed in an overlay on the anterior segment image 420. Further, an index image 440 is presented in the anterior segment image 420. When the index image 440 is included in the range defined by the frame-like image 430, the alignment control unit 111 can select the index alignment mode. If the index image 440 is not included in the range defined by the frame-like image 430, the output control unit 113 indicates that the index image has not been detected (that is, the position of the corneal vertex of the eye E to be examined). A message can be displayed (see FIG. 6C).

  Further, for example, when performing kerato measurement, an operation for selecting an index alignment based on the corneal apex can be performed. This operation may be a tap operation of the index image 440, for example. For example, when performing a reflex measurement, an operation for selecting pupil alignment can be performed. This operation may be a tap operation of the alignment information display area 410 or the frame-like image 430, for example.

<Action and effect>
The operation and effect of the ophthalmologic apparatus according to the embodiment will be described.

  The first aspect of the ophthalmic apparatus according to the embodiment includes an optical system (for example, the measurement optical system 30), a drive unit (for example, the first drive mechanism 80A), an alignment optical system (for example, the alignment optical system 40), and two or more Imaging unit (for example, anterior eye camera 60), first analysis unit (for example, first analysis unit 13), second analysis unit (for example, second analysis unit 14), and alignment control unit (for example, alignment control unit 111) And a first notification unit (for example, output control unit 113, user interface 90, output unit 95).

  The optical system acquires data of the eye to be examined. The drive unit moves the optical system. The alignment optical system projects an index for performing alignment of the optical system with respect to the eye to be examined on the anterior eye portion of the eye to be examined. The two or more photographing units photograph the anterior eye part in a state where the index is projected substantially simultaneously from different directions. The first analysis unit specifies the position of the eye to be inspected based on the index images in the two or more captured images obtained by the two or more imaging units. The second analysis unit specifies the position of the eye to be inspected based on the feature positions in the two or more captured images obtained by the two or more imaging units. The alignment control unit controls the driving unit based on the first alignment mode for controlling the driving unit based on the position of the eye to be examined specified by the first analyzing unit and the position of the eye to be examined specified by the second analyzing unit. The second alignment mode can be selectively executed. A 1st alerting | reporting part alert | reports the information (alignment mode information) which shows the alignment mode currently performed by the alignment control part.

  According to such an ophthalmologic apparatus, it is possible to selectively execute the first and second alignment modes and to notify which alignment mode is applied, so that it corresponds to the condition (disease etc.) of the eye to be examined. The alignment mode can be easily selected. Therefore, it is possible to facilitate alignment.

  In the embodiment, the first notification unit can display the alignment mode information on the display unit. The display means includes either one built in the ophthalmologic apparatus (for example, the display unit 91) or one provided outside the ophthalmologic apparatus.

  According to this configuration, alignment mode information can be visually recognized. The notification of the alignment mode information is not limited to a visual method, and may be a method using other sensory functions such as an auditory method.

  The ophthalmologic apparatus of the embodiment may further include a data control unit (for example, the data control unit 112). The data control unit associates information indicating the alignment mode executed by the alignment control unit with data acquired by the optical system after alignment.

  According to this configuration, it is possible to manage the eye data and alignment mode information acquired by the optical system in an integrated manner. For example, when reading or outputting data of the eye to be examined, alignment mode information associated with this data can also be read or output. This makes it possible to recognize which alignment mode has been applied to acquire this data.

  The second aspect of the ophthalmic apparatus according to the embodiment includes an optical system (for example, the measurement optical system 30), a drive unit (for example, the first drive mechanism 80A), an alignment optical system (for example, the alignment optical system 40), and two or more Imaging unit (for example, anterior eye camera 60), first analysis unit (for example, first analysis unit 13), second analysis unit (for example, second analysis unit 14), and alignment control unit (for example, alignment control unit 111) And a data control unit (for example, the data control unit 112).

  The optical system acquires data of the eye to be examined. The drive unit moves the optical system. The alignment optical system projects an index for performing alignment of the optical system with respect to the eye to be examined on the anterior eye portion of the eye to be examined. The two or more photographing units photograph the anterior eye part in a state where the index is projected substantially simultaneously from different directions. The first analysis unit specifies the position of the eye to be inspected based on the index images in the two or more captured images obtained by the two or more imaging units. The second analysis unit specifies the position of the eye to be inspected based on the feature positions in the two or more captured images obtained by the two or more imaging units. The alignment control unit controls the drive unit based on the first alignment mode for controlling the drive unit based on the position of the eye to be examined specified by the first analysis unit, and the position of the eye to be examined specified by the second analysis unit. The second alignment mode can be selectively executed. The data control unit associates information (alignment mode information) indicating the alignment mode executed by the alignment control unit with data acquired by the optical system after alignment.

  According to such an ophthalmologic apparatus, the first and second alignment modes can be selectively executed, and the data of the eye to be examined and the alignment mode information acquired by the optical system can be integratedly managed. it can. This makes it possible to recognize which alignment mode has been applied to acquire this data.

  The ophthalmologic apparatus of the embodiment may further include an output unit (for example, an output unit 95) that outputs data of the eye to be examined and alignment mode information acquired by the optical system.

  According to this configuration, the data of the eye to be examined and the alignment mode information can be printed, transmitted to an external device, or recorded on a recording medium.

  In the embodiment, when the index image is not detected from any of the two or more captured images by the first analysis unit, the alignment control unit can execute the second alignment mode. That is, it is possible to automatically shift to the pupil alignment mode when the index image is not drawn in the captured image.

  Alternatively, the alignment control unit can execute the second alignment mode when the first analysis unit does not detect an index image from any predetermined range of two or more captured images. That is, it is possible to automatically shift to the pupil alignment mode when the index image is not drawn within a predetermined search range that is a part of the captured image.

  When the index image is not detected from the entire captured image or a predetermined range thereof, the alignment control unit causes the second analysis unit to detect the characteristic position and specify the position of the eye to be examined, and to set the position of the eye to be examined. Based on this, the second alignment mode can be executed.

  According to this configuration, it is possible to perform control so that the second alignment mode (pupil alignment mode) is automatically executed when the first alignment mode (index alignment mode) cannot be performed.

  The ophthalmic apparatus according to the embodiment includes a second notification unit (for example, an output control unit 113, a user interface 90, and an output) that performs notification when the first analysis unit does not detect an index image from the entire captured image or a predetermined range thereof. Part 95).

  According to this configuration, it can be notified that the first alignment mode (index alignment mode) cannot be performed. Therefore, the user can recognize it and can perform preparations and operations for shifting to the second alignment mode (pupil alignment mode).

  In the embodiment, the second notification unit can cause the display unit to display a software key for shifting to the second alignment mode. When the software key is operated, the alignment control unit can start the second alignment mode. Examples of this software key include the alignment information display area 210 and alignment information 210b in FIG. 6C, the alignment information display area 410 and alignment information 411 in FIG. 8, and the frame-like image 430 in FIG.

  According to this configuration, the user can determine whether or not to shift to the second alignment mode. Note that it is also possible to provide means for shifting to the first alignment mode, like a tap operation on the index image 440 in FIG.

  In the embodiment, the optical system may be able to acquire two or more types of data. The ophthalmologic apparatus of such an embodiment may further include a designation unit for designating (automatically or manually) the type of data acquired by the optical system. The designation unit that can be automatically designated is the control unit 11, for example. The designation unit for manual designation is, for example, the user interface 90. The alignment control unit can select one of the first alignment mode and the second alignment mode based on the type specified by the specifying unit.

  According to this configuration, it is possible to select an alignment mode corresponding to the type of examination (measurement, imaging, etc.) performed on the eye to be examined.

  In the embodiment, the first analysis unit specifies the position of the eye to be examined in the optical axis direction (Z direction) of the optical system based on the relative positions of the two or more images of the index detected from the two or more captured images. be able to. The first analysis unit may specify the position of the eye to be examined in a direction (XY direction) orthogonal to the optical axis direction of the optical system based on the positions of two or more images of the index in two or more captured images. it can.

  When a plurality of measurements (photographing) are performed sequentially, alignment can be performed immediately before each measurement. For example, when performing corneal curvature measurement (kerato measurement), eye refractive power measurement (ref measurement), and subjective examination (visual measurement) in this order, before kerato measurement, between kerato measurement and reflex measurement, and It is possible to perform alignment between the reflex measurement and the subjective examination. Further, alignment may be performed immediately before a part of a plurality of measurements.

  The embodiment described above is merely a typical example of the present invention. Therefore, arbitrary modifications (omitted, replacement, addition, etc.) within the scope of the present invention can be made as appropriate.

DESCRIPTION OF SYMBOLS 1 Ophthalmology apparatus 11 Control part 111 Alignment control part 112 Data control part 113 Output control part 12 Data processing part 13 1st analysis part 14 2nd analysis part 30 Measurement optical system 40 Alignment optical system 60 Anterior eye part camera 80A 1st moving mechanism 90 User interface 95 Output section

Claims (13)

An optical system for acquiring data of the eye to be examined;
A drive unit for moving the optical system;
An alignment optical system that projects an index for performing alignment of the optical system with respect to the eye to be examined on the anterior eye portion of the eye to be examined;
Two or more photographing units that photograph the anterior eye portion in a state where the index is projected substantially simultaneously from different directions;
A first analysis unit that identifies the position of the eye to be examined based on the image of the index in two or more captured images obtained by the two or more imaging units;
A second analysis unit that identifies the position of the eye to be examined based on feature positions in two or more captured images obtained by the two or more imaging units;
A first alignment mode for controlling the drive unit based on the position specified by the first analysis unit, and a second alignment mode for controlling the drive unit based on the position specified by the second analysis unit. An alignment control unit capable of selectively executing
An ophthalmologic apparatus comprising: a first notification unit that notifies information indicating an alignment mode being executed by the alignment control unit. The ophthalmologic apparatus according to claim 1, wherein the first notification unit displays the information on a display unit. The ophthalmologic apparatus according to claim 1, further comprising: a data control unit that associates information indicating an alignment mode executed by the alignment control unit with data acquired by the optical system after alignment. An optical system for acquiring data of the eye to be examined;
A drive unit for moving the optical system;
An alignment optical system that projects an index for performing alignment of the optical system with respect to the eye to be examined on the anterior eye portion of the eye to be examined;
Two or more photographing units that photograph the anterior eye portion in a state where the index is projected substantially simultaneously from different directions;
A first analysis unit that identifies the position of the eye to be examined based on the image of the index in two or more captured images obtained by the two or more imaging units;
A second analysis unit that identifies the position of the eye to be examined based on feature positions in two or more captured images obtained by the two or more imaging units;
A first alignment mode for controlling the drive unit based on the position specified by the first analysis unit; and a second alignment mode for controlling the drive unit based on the position specified by the second analysis unit. An selectively executable alignment controller;
An ophthalmologic apparatus comprising: a data control unit that associates information indicating an alignment mode executed by the alignment control unit with data acquired by the optical system after alignment. The ophthalmologic apparatus according to claim 3, further comprising an output unit that outputs the data and the information. The alignment control unit executes the second alignment mode when the image of the index is not detected from any of the two or more captured images by the first analysis unit. The ophthalmic apparatus according to any one of 5. The alignment control unit executes the second alignment mode when the image of the index is not detected from any predetermined range of the two or more captured images by the first analysis unit. Item 6. An ophthalmologic apparatus according to any one of Items 1 to 5. When the index image is not detected, the alignment control unit causes the second analysis unit to execute detection of the characteristic position and specification of the position of the eye to be examined, and to perform the second alignment mode based on the position. The ophthalmic apparatus according to claim 6, wherein the ophthalmic apparatus is executed. The ophthalmologic apparatus according to claim 6, further comprising a second notification unit that performs notification when an image of the index is not detected. The second notification unit causes a display unit to display a software key for shifting to the second alignment mode,
The ophthalmologic apparatus according to claim 9, wherein when the software key is operated, the alignment control unit starts execution of the second alignment mode. The optical system can acquire two or more types of data,
Further comprising a designation unit for designating a type of data acquired by the optical system;
The ophthalmology according to any one of claims 1 to 10, wherein the alignment control unit selects one of the first alignment mode and the second alignment mode based on a type specified by the specifying unit. apparatus. The first analysis unit specifies a position of the eye to be examined in an optical axis direction of the optical system based on a relative position of two or more images of the index detected from the two or more captured images. The ophthalmic apparatus according to any one of claims 1 to 11. The first analysis unit specifies a position of the eye to be examined in a direction orthogonal to an optical axis direction of the optical system based on positions of two or more images of the index in the two or more captured images. The ophthalmologic apparatus according to any one of claims 1 to 12.