Ophthalmic devices

Abstract

To provide an ophthalmologic device capable of executing movement support control for a face support part on the basis of the position of an eye to be examined recognized appropriately.SOLUTION: An ophthalmologic device includes: a measurement head 12 for measuring examination information on an eye E to be examined; a face support part 20 for supporting the face of a subject P, which is movably provided with respect to the measurement head 12; a wide angle camera 60 for capturing a face image M including the right and left eyes E to be examined of the subject P supported by the face support part 20; a touch panel type monitor part 14 for displaying the face image M captured by the wide angle camera 60, and receiving a touch operation for the face image M; and a main control part 17 for executing support control for the movement of the face support part 20 with the touch operation received by the monitor part 14 as input information.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an ophthalmic device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there has been known an ophthalmologic apparatus that photographs a face of a subject including the left and right eyes to be examined and displays the photographed face image on a monitor unit (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-216089 [Patent Document 2] JP 2017-196305 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional ophthalmologic devices, the imaging means (camera) for capturing a facial image is installed near the measurement head for measuring the subject's eye. Therefore, the image capturing the facial image becomes a wide-angle image, and the image of the subject's eye becomes relatively small, making it difficult to appropriately recognize the position of the subject's eye and move the face support unit.

[0005] The present invention has been made in response to the above-mentioned problems, and aims to provide an ophthalmic apparatus that can perform movement support control of a face support unit based on an appropriately recognized position of the test eye. [Means for solving the problem]

[0006] In order to achieve the above object, the ophthalmologic apparatus of the present invention includes a measurement head for measuring the subject's eye to be examined, a face support unit that supports the face of the subject and is provided so as to be movable relative to the measurement head, a wide-angle camera that takes a face image including the left and right eyes to be examined of the subject supported by the face support unit, a touch panel type monitor unit that displays the face image taken by the wide-angle camera and accepts touch operations on the face image, and a touch operation accepted by the monitor unit is used as input information to support and control the movement of the face support unit. Then, the measuring head is moved according to the position of the eye to be examined. A control unit is provided. Then, the control unit calculates the vertical distance from the shooting optical axis of the wide-angle camera to the test eye based on the forward / backward distance from the lens principal point of the wide-angle camera to the test eye, the forward / backward distance from the lens principal point to the image of the test eye captured by the wide-angle camera, and the vertical distance from the shooting optical axis of the wide-angle camera to the image of the test eye. Effect of the Invention

[0007] Therefore, in the ophthalmologic apparatus of the present invention, movement support control of the face support unit can be performed based on the position of the eye to be examined that has been appropriately recognized. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing the appearance of an ophthalmic apparatus according to a first embodiment. [Diagram 2] 1 is a side view showing the appearance of an ophthalmic apparatus according to a first embodiment. [Diagram 3] 2 is a block diagram showing a control system in the ophthalmologic apparatus of the first embodiment. FIG. [Figure 4A] 5 is a flowchart showing a procedure for measuring examination information using the ophthalmologic apparatus of the first embodiment. [Figure 4B] 5 is a flowchart showing a procedure for measuring examination information using the ophthalmologic apparatus of the first embodiment. [Diagram 5] 11A and 11B are diagrams illustrating an example of a display screen when a face image is displayed on a monitor unit. [Figure 6] 13A and 13B are diagrams showing other display examples of the display screen when a face image is displayed on the monitor unit. [Figure 7] 13 is a diagram showing a display example of a display screen when the position of a subject's eye on a face image is specified by an examiner; FIG. [Figure 8] FIG. 13 is a diagram showing an example of a display screen when rough alignment is completed; [Figure 9]10 is an explanatory diagram showing the positional relationship in the ZY direction between a wide-angle camera and a test eye before rough alignment. FIG. [Figure 10] 13A and 13B are diagrams showing examples of display on a display screen when a moving distance and a planned moving distance of a chin rest part are shown. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An ophthalmic apparatus according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0010] Example 1 The ophthalmic apparatus 1 of the first embodiment has two measurement heads, and integrates an autorefractor, an autokeratometer, a non-contact tonometer, and a corneal thickness measurement in one device, and can measure four types of examination information of the subject's eye. The ophthalmic apparatus 1 of the first embodiment is generally called an "autokeratometer".

[0011] In this specification, the X-axis, Y-axis, and Z-axis are taken as shown in each figure, and the description in the specification is based on the left-right direction (the positive direction of the X-axis is the right direction, and the negative direction is the left direction), the front-rear direction (the positive direction of the Z-axis is the rear direction, and the negative direction is the front direction), and the up-down direction (the positive direction of the Y-axis is the up direction, and the negative direction of the Y-axis is the down direction, or sometimes called the height direction) in Fig. 1. In addition, the subject P side (negative direction of the Z-axis) is defined as the front of the ophthalmic device 1, the side facing the subject P (positive direction of the Z-axis) as the back of the ophthalmic device 1, the right side of the subject P (positive direction of the X-axis) as the right side of the ophthalmic device 1, and the left side of the subject P (negative direction of the X-axis) as the left side of the ophthalmic device 1.

[0012] 1 and 2, the ophthalmic apparatus 1 includes an ophthalmic apparatus main body 2 having a main body section 10 and a face support section 20, an optical table 30 on which the ophthalmic apparatus main body 2 is placed, and an examination chair 50 on which a subject P sits. A top plate 31 of the optical table 30 and a seat surface 51 of the examination chair 50 can both be raised and lowered. The ophthalmic apparatus 1 further includes a wide-angle camera 60 that captures a face image M including the left and right eyes E of the subject P, a monitor section 14 that displays the face image M captured by the wide-angle camera 60, and a main control section 17 (control section) that controls each section of the apparatus, such as the ophthalmic apparatus main body 2 and the optical table 30.

[0013] The main body 10 has a base 11, a measuring head 12, a monitor 14, an operation unit 19, a wide-angle camera 60, and a main control unit 17, and the base 11 and the measuring head 12 are covered by a cover member 13.

[0014] As shown in FIG. 2, the base portion 11 incorporates a known XYZ drive mechanism and drive circuit 16 (measurement head drive mechanism) as a movement mechanism for driving the measurement head 12 in the X, Y, and Z directions, respectively.

[0015] As shown in Figure 2, the measurement head 12 is a composite measurement head having a CT measurement head 12a that measures the intraocular pressure and corneal thickness of each of the left and right test eyes E of the subject P, and a KR measurement head 12b that is positioned below the CT measurement head 12a and performs REF measurements and keratometry measurements of each of the left and right test eyes E of the subject P.

[0016] Here, "refractive index measurement" refers to measuring the spherical refractive power, cylindrical refractive power, and astigmatism axis angle of the subject's eye E. "Keratometric measurement" refers to measuring the corneal radius of curvature, corneal refractive power, corneal astigmatism, and corneal astigmatism axis direction of the subject's eye E. In "intraocular pressure measurement," air is blown onto the subject's eye E to measure the intraocular pressure of the subject's eye E. In addition, since the measured intraocular pressure is affected by the corneal thickness, the corneal thickness is measured when measuring the intraocular pressure of the subject's eye E. The ophthalmic device 1 may be equipped with a function to calculate an intraocular pressure correction value that takes into account the effect of corneal thickness on intraocular pressure.

[0017] As shown in FIG. 2, the CT measurement head 12a is provided with a first measurement optical system 15a having a first image sensor 151, together with a known measurement optical system for observation and photography and a control circuit for controlling the measurement optical system. As shown in FIG. 2, the KR measurement head 12b is provided with a second measurement optical system 15b having a second image sensor 152, together with a known measurement optical system for observation and photography and a control circuit for controlling the measurement optical system. The first measurement optical system 15a and the first image sensor 151 are arranged on the first inspection optical axis L1, and are the internal camera of the CT measurement head 12a. The second measurement optical system 15b and the second image sensor 152 are arranged on the second inspection optical axis L2, and are the internal camera of the KR measurement head 12b. In addition, light sources for illuminating the anterior eye and for measuring the membrane shape are arranged in an annular shape on the front of the measurement head 12.

[0018] The monitor unit 14 has a touch panel type display screen 40 configured by stacking touch sensors on the surface of a color liquid crystal panel. The monitor unit 14 accepts touch operations on the display screen 40. Note that "accepting a touch operation" means recognizing the relationship between an image displayed on the display screen 40 and a contact position in association with each other.

[0019] The monitor unit 14 is covered by a cover member 14a. A control circuit unit and the like are built into the cover member 14a. The cover member 14a is supported by one edge of the top of the measurement head 12 and is provided so as to be rotatable around a horizontal axis (around the X-axis or Z-axis) and a vertical axis (around the Y-axis). This allows the display screen 40 to be positioned at a desired angle or direction depending on the examiner's position, posture, eye level, and the like. For example, the display screen 40 can be directed toward the back of the main body 10 as shown in FIG. 2, or the display screen 40 can be directed toward the front of the main body 10 as shown in FIG. 1. The monitor unit 14 can also be positioned on the right or left side of the main body 10, and the display screen 40 can be directed toward the right or left side of the main body 10.

[0020] The base 11, the measurement head 12, and the monitor 14 of the main body 10 are electrically connected. In addition, the main body 10 is electrically connected to the face support 20 and the optical table 30 as shown in FIG. 3. This enables communication of data and operation instructions between the base 11, the measurement head 12, and the monitor 14, and further between the main body 10, the face support 20, and the optical table 30. In addition, for example, a power supply unit provided in the base 11 can be configured to supply power to the measurement head 12, the monitor 14, the face support 20, and further the optical table 30. The power supply unit of the optical table 30 can also be configured to be provided separately from the ophthalmic device main body 2.

[0021] The control circuit unit built into the cover member 14a that covers the monitor section 14 includes a microprocessor, RAM, ROM, EEPROM, flash memory, etc., and functions as the main control section 17, internal memory 17a, and storage section 18 shown in Fig. 3. The main control section 17 mainly consists of a microprocessor, the internal memory 17a mainly consists of RAM, etc., and the storage section 18 mainly consists of ROM, EEPROM, flash memory, etc.

[0022] 3, the first measurement optical system 15a, the second measurement optical system 15b, the XYZ drive mechanism and drive circuit 16, the monitor unit 14, the memory unit 18, the operation unit 19, the wide-angle camera 60, the drive mechanism 25 of the face support unit 20, the table control unit 33 of the optical table 30, etc. are connected to the main control unit 17. The main control unit 17 loads a program stored in the memory unit 18 or the internal memory 17a onto, for example, a ROM, and centrally controls each unit of the ophthalmologic apparatus 1 in response to an operation input signal from the operation unit 19.

[0023] The operation unit 19 includes a power button on the main body 10, a power button 34 on the optical table 30, and a lift lever 35, and accepts operation inputs to these. Operation input signals accepted by the operation unit 19 are sent to the main controller 17 and the table controller 33. In addition, if the ophthalmic apparatus 1 is provided with a control lever or an operation touch unit that can be operated by the examiner or subject P, or is provided with an examiner controller or subject controller, these are also included in the operation unit 19.

[0024] Furthermore, the operation unit 19 includes a touch panel type display screen 40 of the monitor unit 14. That is, the monitor unit 14 displays various icons, an operation touch unit, a keyboard, a face image M captured by the wide-angle camera 60, and the like on the display screen 40. The display screen 40 accepts touch operations on the icons and face images M that it displays. An operation input signal accepted by the display screen 40 is sent to the main control unit 17. As a result, the main control unit 17 controls each unit of the ophthalmologic apparatus 1 using the touch operations accepted on the display screen 40 of the monitor unit 14 as input information.

[0025] The face support unit 20 is connected to the front (front face) of the base unit 11 of the main body unit 10. Note that the face support unit 20 is not limited to being connected to the main body unit 10, and may be separated from the main body unit 10 and installed on the optical table 30.

[0026] The face support part 20 includes a base part 21 connected and fixed to the base part 11, a chin rest part 22 provided on the base part 21 so as to be movable up and down, a pair of pillars 23 provided protruding from both the left and right sides of the base part 21, a forehead rest part 24 provided on the upper ends of the pair of pillars 23, and a drive mechanism 25 as a face support part moving mechanism that moves the chin rest part 22 in the up and down direction. The face support part 20 may be provided so as to be movable in the front-rear direction and the left-right direction so that the position in the front-rear direction and the left-right direction can be adjusted.

[0027] The chin rest 22 is a member on which the chin of the subject P is placed. In Example 1, the chin rest 22 is provided to be vertically movable with respect to the base 21, thereby allowing it to be vertically movable with respect to the main body 10, and the face of the subject P placed on the chin rest 22 is movable relatively to the measurement head 12. However, as another different embodiment, the entire face support part 20 may be configured to be vertically movable with respect to the main body 10, allowing the face of the subject P to be vertically movable relative to the measurement head 12.

[0028] The forehead rest 24 is a member against which the forehead of the subject P is abutted. In Example 1, the forehead rest 24 is provided on a pair of support columns 23, and the position in the front-rear direction is fixed. However, in another different embodiment, the position of the forehead rest 24 may be freely adjusted in the front-rear direction. By configuring the fore-rear direction position adjustment of the forehead rest 24 to be performed by an appropriate drive mechanism (face support moving mechanism), automatic adjustment by a program or adjustment by an operation input signal from the operation unit 19 can be made possible. Furthermore, a configuration in which manual adjustment is also possible may be adopted.

[0029] The subject P faces the ophthalmologic apparatus main body 2 while seated on an examination chair 50 or the like placed in front of (in front of) the ophthalmologic apparatus main body 2, places his / her chin on the chin rest 22, and stabilises his / her face (head) by pressing his / her forehead against the forehead rest 24 to receive the measurement of examination information. Note that in the case of a short subject P such as a child, the measurement may be performed with the subject P standing and pressing his / her face against the face support part 20, rather than sitting on the examination chair 50. Also, in the case of a subject P in a wheelchair, the measurement may be performed with the subject P in the wheelchair pressing his / her face against the face support part 20.

[0030] The face support part 20 may have any configuration as long as it supports and stabilizes the face of the subject P so that the face (head) of the subject P does not move unexpectedly during measurement of the examination information of the subject's eye E. As another different embodiment, for example, the face support part 20 may have only one of the chin rest part 22 and the forehead rest part 24. When only the forehead rest part 24 is provided, this forehead rest part 24 (or the entire face support part 20) can be freely moved in the vertical direction, etc. by a predetermined drive mechanism.

[0031] The driving mechanism 25 is configured by a known driving mechanism, for example, a driving mechanism including a stepping motor, a driving mechanism including a DC motor and a potentiometer, etc. The driving mechanism 25 is driven to move the chin rest portion 22 in a predetermined moving direction, either upward or downward, at a predetermined moving speed, by a predetermined moving distance (moving amount).

[0032] The driving mechanism 25 is controlled by the main control unit 17. Specifically, the main control unit 17 calculates movement information such as the moving distance and moving direction of the chin rest 22 using a touch operation on a face image M including the left and right eyes E photographed by the wide-angle camera 60 and displayed on the display screen 40 as an operation input signal (input information). Then, the main control unit 17 controls the driving mechanism 25 according to the calculated movement information to move the chin rest 22 up and down. The moving distance and moving direction of the chin rest 22 can be detected by the number of steps of a stepping motor, the numerical value of a potentiometer, etc., and the main control unit 17 can easily and highly accurately control the movement of the chin rest 22 based on these numerical values.

[0033] In the first embodiment, the main control unit 17 functions as a face support unit control unit, but the present invention is not limited to this, and a face support unit control unit may be provided separately from the main control unit 17. In this case, the face support unit control unit drives and controls the drive mechanism 25 to move the chin rest unit 22 in response to an instruction signal from the main control unit 17.

[0034] The optical table 30 includes a top plate 31 on which the ophthalmic apparatus main body 2 is placed, a lifting mechanism 32 as a table moving mechanism for raising and lowering the top plate 31, a table control unit 33 for controlling the driving of the lifting mechanism 32, a power button 34, a lifting lever 35 for manually operating the lifting mechanism 32, and a caster base 36 to which the lifting mechanism 32 is attached. In the first embodiment, the ophthalmic apparatus 1 performs measurement while the subject P is seated on the examination chair 50 (seated position), so the height of the optical table 30 is set to a height corresponding to measurement in a seated position. On the other hand, the ophthalmic apparatus 1 may also perform measurement while the subject P is standing (standing position). In this case, it is not necessary to provide the examination chair 50, and the optical table 30 is set to a height corresponding to measurement in a standing position.

[0035] The lifting mechanism 32 is controlled by the table control unit 33 to raise and lower the top board 31. This allows the height of the top board 31 to be adjusted according to the height and chin position of the subject P. The lifting mechanism 32 includes a lifting rod 32a that supports the top board 31, a support rod 32b that supports the lifting rod 32a so that it can move up and down, and a drive unit 32c that moves the lifting rod 32a up and down. Movement information (movement direction, movement distance, movement speed, etc.) of the lifting rod 32a is detected by a rotary encoder or the like and sent to the table control unit 33.

[0036] The driving unit 32c is, for example, an electric type constituted by an electric actuator or the like, but is not limited to this configuration. As the driving unit 32c, a hydraulic type, a pneumatic type, a screw type, a link type, or other known lifting mechanism can be used.

[0037] The caster base 36 supports the entire optical table 30. The caster base 36 is provided with casters 36a with a locking mechanism. This allows the examiner or the like to easily move the ophthalmic apparatus 1 together with the optical table 30 to a desired installation location, and at the installation location, the ophthalmic apparatus 1 can be stably installed by locking the casters 36a to prevent unexpected movement.

[0038] The table control unit 33 is configured to include a microprocessor, and an internal memory 33a consisting of a RAM, a ROM, a flash memory, etc. The table control unit 33 is electrically connected to the lifting mechanism 32, a power button 34, and a lifting lever 35. The power button 34 sends an ON / OFF operation input signal to the table control unit 33. The lifting lever 35 can be freely pushed up and down, and when this operation is performed, an operation input signal for raising or lowering is sent to the table control unit 33.

[0039] The table control unit 33 receives an operation input signal for raising or lowering from the lift lever 35, and controls and drives the drive unit 32c of the lift mechanism 32 to move the top board 31 (optical table 30) in the vertical direction. In addition, in the case of the automatic adjustment mode, the table control unit 33 controls the drive unit 32c based on an input signal from the main control unit 17 to move the top board 31 in the vertical direction.

[0040] The examination chair 50 may be a known chair capable of adjusting the height of the seat 51. For example, it may be a gas pressure type or an electric type. In the first embodiment, the examination chair 50 is configured to be capable of adjusting the height of the seat 51 independently without interlocking with the ophthalmologic apparatus main body 2 or the optical table 30, but is not limited thereto. For example, the seat 51 may be configured to move in the vertical direction or the like in response to a touch operation on the display screen 40 of the monitor unit 14. Also, it may be configured to control the movement of the chin rest unit 22, the optical table 30, and the examination chair 50 so that they are appropriately positioned under the control of the main control unit 17.

[0041] The wide-angle camera 60 has a cylindrical housing, a wide-angle lens, and an imaging element, and is a single camera that captures a facial image M including the left and right eyes E and the jaw of the subject P supported by the face support unit 20 from one position. The wide-angle camera 60 is located in front of the head of the measurement head 12 facing the face support unit 20, and is disposed at a position where the imaging optical axis L3 coincides with the first examination optical axis L1 of the CT measurement head 12a and the second examination optical axis L2 of the KR measurement head 12b in the X-axis direction (left-right direction and horizontal direction). The wide-angle camera 60 is also disposed at a height position between the height position of the first examination optical axis L1 of the CT measurement head 12a and the height position opposite the second examination optical axis L2 of the KR measurement head 12b in the Y-axis direction (height direction and vertical direction) (see FIG. 2). The facial image M captured by the wide-angle camera 60 is a moving image here. The wide-angle camera 60 may continue capturing images during the initial stage from when the power is turned on until the rough alignment is completed, and until the measurements by the CT measuring head 12a and the KR measuring head 12b are completed, or may stop capturing images as appropriate.

[0042] The vertical angle of view of the wide-angle camera 60 in the Y-axis direction (vertical direction) is set to an angle such that the subject's eye E and the chin of the subject P, which are different in position depending on the measurement mode, are both included in the angle of view during each measurement by the CT measurement head 12a and the KR measurement head 12b. That is, the position of the subject's eye E during measurement by the CT measurement head 12a and the position of the subject's eye E during measurement by the KR measurement head 12b are shifted in the Y-axis direction and the Z-axis direction. In contrast, the vertical angle of view of the wide-angle camera 60 is determined by setting the line where the subject's eye E is included during measurement by the CT measurement head 12a as the upper limit of the vertical angle of view and the line where the subject's eye E is included during measurement by the KR measurement head 12b as the lower limit of the vertical angle of view. In the first embodiment, the vertical angle of view of the wide-angle camera 60 is set to an angle of, for example, 70° or more.

[0043] The horizontal angle of view of the wide-angle camera 60 in the X-axis direction (horizontal direction) is set to an angle such that when either the left or right eye E is positioned on the imaging optical axis L3 during each measurement by the CT measuring head 12a and the KR measuring head 12b, the other eye is also captured in the angle of view. In the first embodiment, the horizontal angle of view of the wide-angle camera 60 is set to, for example, an angle of 90° or more.

[0044] The wide-angle camera 60 only needs to be able to capture a facial image M including the left and right eyes E of the subject P supported by the face support unit 20 and the chin of the subject P. That is, the wide-angle camera 60 refers to a photographing means including a wide-angle camera equipped with a wide-angle lens capable of capturing a wide angle range by shortening the focal length, an ultra-wide-angle camera equipped with an ultra-wide-angle lens, and a fisheye camera equipped with a fisheye lens. In addition, the wide-angle lens and the ultra-wide-angle lens are different in that the distortion occurring when capturing a wide angle range is corrected, whereas the fisheye lens captures the distortion as it is without correcting it. However, the fisheye lens can be said to be a type of ultra-wide-angle lens in the sense that it is a lens that can capture a wide angle range.

[0045] An example of the operation from when the ophthalmic apparatus 1 of the embodiment 1 is powered on to when the measurement of predetermined test information is completed will be described below with reference to Fig. 4A to Fig. 8. The measurement procedure shown in the flowcharts of Fig. 4A and Fig. 4B is based on the premise that the test information of each of the left and right eyes E of a single subject P is measured, and is started when the ophthalmic apparatus 1 is powered on.

[0046] In step S1, when the examiner turns on the power to the ophthalmic apparatus 1 (the ophthalmic apparatus main body 2 and the optical table 30) to measure the examination information of the subject P's eye E, the main control unit 17 moves the measurement head 12 to the initial position using the XYZ drive mechanism / drive circuit 16.

[0047] In step S2, following the movement of the measuring head 12 to the initial position in step S1, the main control unit 17 judges whether or not the subject P has placed his / her face on the chin rest 22 based on the detection value by the detection sensor 26 (contact sensor) of the face support unit 20. The main control unit 17 repeats the judgment of step S2 while the subject P has not placed his / her face on the chin rest 22, and when it judges that the subject P has placed his / her face on the chin rest 22, it proceeds to step S3.

[0048] In step S3, following the determination in step S2 that the subject P has placed his / her face on the chin rest 22, the main control unit 17 starts capturing a facial image M including the left and right eyes E and the chin of the subject P with the wide-angle camera 60. Note that the capturing of images by the wide-angle camera 60 continues until the predetermined measurement is completed.

[0049] In step S4, following the start of capturing the face image M in step S3, the main control unit 17 causes the face image M captured by the imaging element of the wide-angle camera 60 to be displayed on the display screen 40 of the monitor unit 14, as shown in Fig. 5 or 6. In addition, the main control unit 17 causes a first frame mark 41 indicating the movable range of the measurement head 12 in the XYZ directions and a pair of second frame marks 42 indicating a standard position of the subject's eye relative to the first frame mark 41 (standard measurement position) to be superimposed on the face image M and displayed on the display screen 40.

[0050] Here, the facial image M displayed on the display screen 40 may be an image of a region of the facial image M captured by the imaging element that does not include the chin of the subject P (for example, an upper image of the facial image M) as shown in Fig. 5, or an image of a region that includes both the left and right eyes E to be examined and the chin of the subject P (for example, an entire image of the facial image M) as shown in Fig. 6. The facial image M is displayed in a square first display region 40a set in the center of the display screen 40.

[0051] When displaying an area of ​​the face image M that does not include the chin of the subject P in the first display area 40a, the main controller 17 causes an image of an area including at least the chin of the subject P (for example, a lower image of the face image M, hereinafter referred to as "chin image M'") in the face image M captured by the imaging element of the wide-angle camera 60 to be displayed on the display screen 40, as shown in Fig. 5. The chin image M' is displayed in the second display area 40b set below the first display area 40a.

[0052] In addition to the first display area 40a and the second display area 40b, the display screen 40 of the monitor unit 14 is provided with a third display area 40c for displaying various icons. The main control unit 17 displays, in the third display area 40c, an ID touch area T1 for inputting the ID of the subject P, an R touch area T2 for manually selecting the right eye, a chin rest vertical movement touch area T3 for manually moving the chin rest 22 up and down, a mode setting touch area T4 (mode setting icon) for setting a measurement mode, a setup touch area T5 for displaying a setup screen, an L touch area T6 for manually selecting the left eye, a measurement head front and rear touch area T7 for manually moving the measurement head 12 in the front and rear direction (Z-axis direction), and an A / M touch area T8 for switching between automatic and manual modes. The icons displayed in the third display area 40c are not limited to those shown in FIG. 5 and FIG. 6, and other icons are displayed as appropriate.

[0053] In step S5, following the display of the face image M in step S4, the main control unit 17 sets the measurement mode and proceeds to step S6. Here, the measurement mode is set based on the operation input signal received by the monitor unit 14 when the examiner touches (tap) the mode setting touch unit T4 displayed on the monitor unit 14. Here, the set mode is set to any one of a first measurement mode in which the CT measurement head 12a measures intraocular pressure and corneal thickness, a second measurement mode in which the KR measurement head 12b measures reflex measurement and keratometry, and a third measurement mode in which the CT measurement head 12a measures intraocular pressure and corneal thickness, and the KR measurement head 12b measures reflex measurement and keratometry in succession. The display state of the mode setting touch unit T4 is switched according to the touch operation by the examiner, that is, the measurement mode to be set.

[0054] In step S6, following either the setting of the measurement mode in step S5, or the determination that the touch operation has not been accepted twice in step S9, or the interruption of the rough alignment in step S16, or the determination that a touch operation (long press operation) on the face image M has been accepted in step S19, the examiner visually checks the face image M displayed in the first display area 40a, confirms the position of the subject's eye E, and then performs a predetermined touch operation (here, a tap operation) on the subject's eye E on the face image M to specify a position in the XY directions on the image of the subject's eye E. The touch operation on the first display area 40a is accepted by the monitor unit 14.

[0055] In step S7, following the position of the examiner's eye E in the XY directions specified by the examiner in step S6, the main controller 17 displays a cross-shaped tap mark 43 at the position where the examiner touched, as shown in Fig. 7. The tap mark 43 is displayed superimposed on the face image M. Note that when the main controller 17 determines that the position where the examiner touched is deviated from the position of the examiner's eye E on the image obtained by image analysis of the face image M by a preset distance or more, it may display an error message on the display screen 40 to warn the examiner to redo the touch operation.

[0056] In step S8, following the display of the tap mark 43 in step S7, the main control unit 17 enlarges the face image M at a preset magnification ratio to generate an enlarged image M1, and displays a predetermined range of the generated enlarged image M1, determined based on the contact position on the monitor unit 14, on the display screen 40. The enlarged image M1 is displayed, for example, in a fourth display area 40d set adjacent to the second display area 40b, as shown in FIG. 7. The tap mark 43 is also displayed superimposed on the enlarged image M1. The enlarged image M1 is a still image at the timing when the face image M is tapped. Note that FIG. 7 shows a state after the examiner performs a touch operation on each of the left and right test eyes E. When a touch operation is performed on only one of the left and right test eyes E, only one tap mark 43 is displayed and only one enlarged image M1 is displayed.

[0057] In step S9, following the display of the enlarged image M1 in step S8, the main controller 17 judges whether or not the monitor unit 14 has received a predetermined touch operation (a tap operation on the face image M) twice. If the main controller 17 judges that the monitor unit 14 has not received two touch operations, the process returns to step S6. If the main controller 17 judges that the monitor unit 14 has received two touch operations, the process proceeds to step S10. Note that the "state in which the monitor unit 14 has received two touch operations" refers to a state in which the XY positions of the left and right eyes E to be examined are respectively specified by the examiner.

[0058] In step S10, following the determination in step S9 that two touch operations (tap operations) have been received, the main controller 17 sets the order of measurements of the left and right subject eyes E by the measurement head 12 based on the order of the two touch operations received with a time difference. Here, which position of the left or right subject eye E is designated by the two touch operations received with a time difference is determined from the relative positional relationship of the two contact positions with respect to the first display area 40a. That is, when the contact position of the first touch operation is to the left of the contact position of the second touch operation, the order is set to measure the test information of the left eye first, followed by the test information of the right eye.

[0059] In step S11, following the setting of the measurement order in step S10, the main control unit 17 calculates the movement distance of the chin rest part 22 in the Y-axis direction to match the vertical heights of the two tap marks 43 and the pair of second frame marks 42. Here, as the movement distance of the chin rest part 22 in the Y-axis direction, the vertical distance (ΔY') from the photographing optical axis L3 of the wide-angle camera 60 to the subject's eye E on the facial image M is calculated based on the XY position of the subject's eye E on the image specified by the examiner by touching the facial image M. A detailed calculation method of ΔY' will be described later.

[0060] In step S12, following the calculation of ΔY' in step S11 or the determination that the coarse alignment is not complete in step S17, the main control unit 17 controls the drive mechanism 25 to move the chin rest 22 by ΔY' in the Y-axis direction. This causes the face of the subject P to move up and down together with the chin rest 22, and starts the execution of coarse alignment using a touch operation on the face image M captured by the wide-angle camera 60 as input information. Note that the coarse alignment refers to moving the chin rest 22 to bring the positional deviation between the subject's eye E and the measuring head 12 within the movable range of the measuring head 12 in the XYZ directions.

[0061] In step S13, following the movement control of the chin rest 22 in step S12 (start of execution of rough alignment), the main control unit 17 judges whether or not the monitor unit 14 has received a predetermined touch operation (here, a tap operation on the enlarged image M1 displayed in the fourth display area 40d) on the monitor unit 14. If the monitor unit 14 has not received a touch operation (no tap operation on the enlarged image M1), the main control unit 17 proceeds to step S15, and if it judges that the monitor unit 14 has received a touch operation (a tap operation on the enlarged image M1), the main control unit 17 proceeds to step S14.

[0062] In step S14, following the determination in step S13 that the touch operation (tap operation) on the enlarged image M1 has been accepted, the main controller 17 corrects the movement control (rough alignment) of the chin rest 22 using the contact position on the enlarged image M1 as information on the new XY position of the subject's eye E. Specifically, first, the main controller 17 temporarily erases the tap mark 43 displayed in the first display area 40a and the fourth display area 40d. Then, the main controller 17 redisplays the tap mark 43 at the contact position on the fourth display area 40d. Also, based on the positional relationship between the tap mark 43 and the enlarged image M1, the main controller 17 redisplays the tap mark 43 in the first display area 40a. Then, the main controller 17 determines that the examiner has touched the fourth display area 40d, and the XY position of the subject's eye E has been specified again. That is, the main controller 17 sets the contact position on the enlarged image M1 as the XY position of the subject's eye E on the image, and recalculates ΔY' based on the newly set position of the subject's eye. Then, the main controller 17 moves the chin rest 22 in the Y-axis direction with the newly calculated ΔY' as a target value.

[0063] In step S15, following the determination in step S13 that a touch operation (tap operation) on the enlarged image M1 has not been accepted or the correction of the rough alignment in step S14, the main control unit 17 determines whether or not the monitor unit 14 has accepted a predetermined touch operation on the monitor unit 14 (here, a swipe operation on the face image M displayed in the first display area 40a). If the monitor unit 14 has not accepted a touch operation (no swipe operation on the face image M), the main control unit 17 proceeds to step S17, and if the monitor unit 14 has accepted a touch operation (a swipe operation on the face image M), the main control unit 17 proceeds to step S16.

[0064] In step S16, following the determination in step S15 that a touch operation (swipe operation) on the face image M has been accepted, the main control unit 17 stops the movement of the chin rest portion 22. That is, the coarse alignment is interrupted. Then, an error message prompting the examiner to re-designate the position of the subject's eye (touch operation on the face image M) is displayed on the display screen 40, and the process returns to step S6. This allows the examiner to re-designate the position of the subject's eye and redo the coarse alignment. Note that after interrupting the coarse alignment and displaying the error message, the process may proceed to the end without returning to step S6.

[0065] In step S17, following the determination in step S15 that the touch operation (swipe operation) on the face image M has not been accepted, the main control unit 17 determines whether or not the movement of the chin rest portion 22 in the Y-axis direction has been completed. If the movement in the Y-axis direction has been completed, that is, if the chin rest portion 22 has moved by ΔY', it is determined that the rough alignment has been completed and the process proceeds to step S18. On the other hand, if the movement of the chin rest portion 22 has not been completed, the process returns to step S12.

[0066] When the chin rest 22 is moved by ΔY' in the Y-axis direction to complete the rough alignment, the two tap marks 43 and the pair of second frame marks 42 approach each other in the vertical direction, so that the deviation in the Y-axis direction between the subject's eye E on the image and the standard measurement position (second frame mark 42) is reduced as shown in FIG. 8. However, ΔY' is a value calculated based on the subject's eye position on the image designated by the examiner's touch operation on the face image M (hereinafter referred to as "designated subject's eye position B", see FIG. 9). That is, as shown in FIG. 9, the actual position of the subject's eye E (actual subject's eye position C) is deviated by ΔY-ΔY' in the Y-axis direction from the designated subject's eye position B. Furthermore, the actual subject's eye position C is deviated by ΔZ in the Z-axis direction from the designated subject's eye position B. Here, "ΔY" is the actual deviation distance in the Y-axis direction between the actual subject's eye position C and the imaging optical axis L3 of the wide-angle camera 60. That is, ΔY-ΔY' is the movement correction distance of the chin rest 22 for matching the actual vertical position of the subject's eye E with the photographing optical axis L3 of the wide-angle camera 60. Also, "ΔZ" is the actual deviation distance in the Z-axis direction between the actual position C of the subject's eye and the designated position B of the subject's eye.

[0067] As a result, after completion of the rough alignment, the chin rest 22 can be further moved in the Y-axis direction by ΔY-ΔY' to further reduce the deviation in the Y-axis direction between the actual vertical position of the subject's eye E and the standard measurement position (second frame mark 42). In addition, by moving the measurement head 12 in the Z-axis direction by ΔZ in advance before the fine alignment described below, the time required for the fine alignment can be shortened. A detailed calculation method for ΔY-ΔY' and ΔZ will be described later.

[0068] In step S18, following the determination that the rough alignment is complete in step S17 or the determination that the measurement is not complete in step S24, the main controller 17 switches the display in the fourth display area 40d as shown in Fig. 8. That is, the main controller 17 displays only the enlarged image M1 of the subject's eye E to be measured (enlarged image M1 of the left eye in Fig. 8) in the fourth display area 40d according to the measurement order set in step S10. The enlarged image M1 of the subject's eye E to be measured is determined from the relative positional relationship between the two contact positions with respect to the first display area 40a. That is, when the left eye is measured first, the enlarged image M1 of a predetermined range is displayed with the contact position on the first display area 40a being the relatively left contact position as the center.

[0069] In step S19, following the switching of the fourth display area 40d in step S18, the main controller 17 judges whether the monitor unit 14 has received a predetermined touch operation (here, a long press operation on the face image M displayed in the first display area 40a). If the monitor unit 14 has not received a touch operation (no long press operation on the face image M), the main controller 17 proceeds to step S19, and if the monitor unit 14 has received a touch operation (long press operation on the face image M), the main controller 17 returns to step S6. This allows the examiner to re-designate the position of the subject's eye and redo the rough alignment. At this time, the main controller 17 may display a message on the display screen 40 to prompt the examiner to re-designate the position of the subject's eye (touch operation on the face image M).

[0070] In step S20, following the determination in step S19 that the touch operation (long press operation) on the face image M has not been accepted, the examiner performs a predetermined touch operation (here, a tap operation) on the enlarged image M1 displayed in the fourth display area 40d to specify a feature point (e.g., the pupil position) of the subject's eye E. The touch operation on the fourth display area 40d is accepted by the monitor unit 14. In addition, the main control unit 17 displays a cross-shaped tap mark 43 at the position touched by the examiner (see FIG. 8). The tap mark 43 is displayed superimposed on the enlarged image M1.

[0071] In step S21, following the designation of a feature point on the screen by the examiner in step S20 or the determination that the precise alignment is incomplete in step S22, the main controller 17 moves the CT measuring head 12a or the KR measuring head 12b used for the measurement according to the measurement mode set in step S5, and performs automatic adjustment of the precise alignment for the designated feature point. At this time, the main controller 17 displays a cross-shaped alignment mark 44 indicating the alignment center in the fourth display area 40d (see FIG. 8).

[0072] In automatic adjustment of the precision alignment, the main control unit 17 calculates the distance between the tap mark 43 and the alignment mark 44 displayed in the fourth display area 40d, and controls the driving of the XYZ driving mechanism and driving circuit 16 based on the calculated distance value. Then, based on the calculated distance value, the measuring head 12 (the CT measuring head 12a or the KR measuring head 12b) is moved in the up-down and left-right directions (Y-axis direction and X-axis direction), and the measuring head 12 is moved in the front-back direction (Z-axis direction) so that the feature point image is focused.

[0073] In step S22, following the automatic adjustment of the precision alignment in step S21, the main control unit 17 judges whether the precision alignment is complete or not. If the precision alignment is not complete, the process returns to step S21, and if the precision alignment is complete, the process proceeds to step S23.

[0074] In step S23, following the determination of completion of the precise alignment in step S22, the main controller 17 automatically starts measuring the test information of the subject's eye E. Here, the main controller 17 may continue to display the face image M captured by the wide-angle camera 60 on the display screen 40 during the measurement of the test information of the subject's eye E. At this time, the area of ​​the first display region 40a may be reduced from that before the measurement of the test information, and may be set to any position within the display screen 40.

[0075] In step S24, following the measurement of the subject's eye E in step S23, the main controller 17 stores the measurement results in the memory 18 and judges whether or not all necessary measurements have been completed. If the measurement of necessary test information has not been completed, the process returns to step S18, and if all necessary measurements have been completed, the process proceeds to the end.

[0076] Hereinafter, a method of calculating ΔY' in step S11 and a method of calculating ΔY-ΔY' and ΔZ in step S17 will be described with reference to Fig. 9. Fig. 9 shows a schematic diagram of the positional relationship between the subject's eye E and the wide-angle camera 60 in the Y-axis direction (up-down direction) and the Z-axis direction (front-back direction).

[0077] In FIG. 9, 61 indicates the photographing optical system of the wide-angle camera 60, a straight line L3 indicates the photographing optical axis of the photographing optical system 61, and a point A indicates the lens principal point of the photographing optical system 61. Also, a point B indicates the position of the subject's eye E on the face image M (designated position of the subject's eye). The position of the designated position B of the subject's eye in the XY direction is set by the examiner touching the face image M, and the position of the designated position B of the subject's eye in the Z direction is set to the position where the wide-angle camera 60 is focused. When calculating ΔY', it is assumed that the subject's eye E is present at the designated position B of the subject's eye, which is a position on the face image M. Also, a point C indicates the actual position of the subject's eye E (actual position of the subject's eye). Furthermore, a point D indicates the center position of the image of the subject's eye captured by the image sensor 62 of the wide-angle camera 60 (hereinafter referred to as the "position of the subject's eye image"). 9 is the distance in the front-back direction (Z-axis direction) from the lens principal point A of the photographing optical system 61 to the designated position B of the subject's eye. "s'" in Fig. 9 is the distance (focal length) from the lens principal point A of the photographing optical system 61 to the image sensor 62 of the wide-angle camera 60 in the front-back direction (Z-axis direction).

[0078] Then, the moving distance ΔY′ of the chin rest portion 22 for matching the vertical positions of the two tap marks 43 and the pair of second frame marks 42 is calculated from the following formula (1). ΔY´ = (s / s´)×Δy´ ···(1) Here, Δy′ is the distance in the vertical direction (Z-axis direction) from the photographing optical axis L3 of the wide-angle camera 60 to the subject's eye image position D. “Δy′” is detected from the subject's eye image captured by the imaging element 62.

[0079] 9, the moving distance ΔY' of the chin rest 22 is the vertical distance from the photographing optical axis L3 of the wide-angle camera 60 to the subject's eye E on the face image M. That is, the main control unit 17 calculates the vertical distance (ΔY') from the photographing optical axis L3 to the subject's eye E (designated position B of the subject's eye) on the face image M based on the front-rear distance (s) from the lens principal point A of the wide-angle camera 60 to the subject's eye E (designated position B of the subject's eye) on the face image M, the front-rear distance (s') from the lens principal point A to the subject's eye image position D, and the vertical distance (Δy') from the photographing optical axis L3 of the wide-angle camera 60 to the subject's eye image position D.

[0080] Furthermore, ΔY' is calculated on the assumption that the subject's eye E is located at the designated subject's eye position B, which is a position on the face image M, but the subject's eye E is actually located at a position (actual subject's eye position C) shifted from the designated subject's eye position B. Therefore, the actual deviation distance ΔY in the Y-axis direction between the actual subject's eye position C and the imaging optical axis L3 of the wide-angle camera 60 is calculated from the following formula (2) taking into account the actual deviation distance ΔZ in the Z-axis direction between the actual subject's eye position C and the designated subject's eye position B. ΔY = ((s+ΔZ) / s´)×Δy´ ···(2)

[0081] Furthermore, the difference between ΔY and ΔY′ (the deviation distance in the Y-axis direction between the actual position C of the subject's eye and the designated position B of the subject's eye) is calculated by the following formula (3). ΔY-ΔY´ = ((s+ΔZ) / s´)×Δy2´ ···(3)

[0082] Here, "Δy2'" is the vertical (Z-axis) distance from the photographing optical axis L3 of the photographing optical system 61 to the subject's eye image position D at the time when the rough alignment of moving the chin rest 22 by ΔY' is completed. Moreover, the deviation distance in the Y-axis direction between the subject's eye actual position C and the subject's eye designated position B calculated by the above formula (3) is the movement correction distance of the chin rest 22 for matching the actual vertical position of the subject's eye E with the photographing optical axis L3. That is, the main control unit 17 calculates the movement correction distance (ΔY-ΔY') of the chin rest 22 based on the movement distance (ΔY') of the chin rest 22 and the vertical distance (ΔY) from the photographing optical axis L3 of the wide-angle camera 60 to the subject's eye actual position C.

[0083] The unknown values ​​in equations (2) and (3) are ΔY and ΔZ. Therefore, by solving equations (2) and (3) as simultaneous equations, the unknown values ​​ΔY and ΔZ can be calculated.

[0084] As a result, the vertical distance (ΔY) from the photographing optical axis L3 of the wide-angle camera 60 to the actual eye E before rough alignment can be obtained.

[0085] Furthermore, by calculating the front-rear distance ΔZ from the designated position B of the eye to the actual eye E, it is possible to calculate the front-rear distance (s+ΔZ) from the lens principal point A of the wide-angle camera 60 before rough alignment to the actual eye E. That is, the main controller 17 calculates the front-rear distance (s+ΔZ) from the lens principal point A of the wide-angle camera 60 to the actual eye E based on the vertical distance (ΔY) from the imaging optical axis L3 of the wide-angle camera 60 to the actual position C of the eye and the movement correction distance (ΔY-ΔY') of the chin rest part 22 for matching the actual vertical position of the eye E with the imaging optical axis L3.

[0086] The characteristic functions of the ophthalmologic apparatus 1 of the first embodiment will be described below.

[0087] The ophthalmic device 1 of the first embodiment includes a measurement head 12 for measuring the subject's eye E of the subject P, a face support unit 20 that supports the face of the subject P and is provided so as to be movable relative to the measurement head 12, a wide-angle camera 60 that captures a face image M including the left and right eyes E of the subject P supported by the face support unit 20, and a touch panel type monitor unit 14 that displays the face image M captured by the wide-angle camera 60 and accepts touch operations on the face image M. Furthermore, the ophthalmic device 1 of the first embodiment includes a main control unit 17 that performs support control of the movement of the chin rest unit 22 of the face support unit 20 relative to the measurement head 12 using the touch operations accepted by the monitor unit 14 as input information.

[0088] That is, when the ophthalmologic apparatus 1 measures the subject's eye E, the process proceeds to steps S1, S2, S3, and S4 in the flowchart shown in Fig. 4A, and the face image M captured by the wide-angle camera 60 is displayed on the display screen 40 of the monitor unit 14. At this time, since the left and right subject's eyes E of the subject P are displayed in the face image M captured by the wide-angle camera 60, the image of the subject's eye E becomes relatively small, and it becomes difficult to appropriately recognize the position of the subject's eye E in image processing.

[0089] In contrast, in the ophthalmologic apparatus 1 of the first embodiment, the process proceeds to step S5 and step S6, and when the XY position of the subject's eye E on the image is specified by the examiner's touch operation (tap operation) on the face image M, the process proceeds to step S7, step S8, and step S9. Furthermore, when the examiner performs two touch operations on the face image M to specify the XY positions of the left and right eyes E, the process proceeds to step S10 and step S11, where the position of the subject's eye E is set based on the examiner's touch operation on the face image M, and the movement distance (ΔY') of the chin rest portion 22 in the Y-axis direction is calculated. Then, the process proceeds to step S12, where the chin rest portion 22 is moved in the Y-axis direction to perform rough alignment.

[0090] In this way, the main controller 17 sets the position of the subject's eye E based on the examiner's touch operation on the face image M, calculates the moving distance (ΔY') of the chin rest portion 22 in the Y-axis direction, and performs rough alignment by moving the chin rest portion 22. Therefore, even if the image of the subject's eye E becomes relatively small in the face image M and it is difficult to recognize the subject's eye E by image processing, the main controller 17 can perform support control of the movement of the face support portion 20 (chin rest portion 22) based on the appropriately recognized position of the subject's eye E by moving the chin rest portion 22 using the examiner's touch operation received by the monitor portion 14 as input information.

[0091] In the ophthalmologic apparatus 1 of the first embodiment, when the monitor unit 14 receives a predetermined touch operation (a swipe operation on the face image M) during the movement of the chin rest unit 22, the main control unit 17 stops the movement of the chin rest unit 22 and interrupts the rough alignment. That is, after the chin rest unit 22 is moved to start the rough alignment in step S12 of the flowchart shown in Fig. 4B, the process proceeds to steps S13, S14, and S15, and if it is determined that a swipe operation on the face image M has been performed, the process proceeds to step S16 to stop the movement of the chin rest unit 22 and interrupt the rough alignment.

[0092] As a result, even if an unexpected event occurs, such as the face of the subject P coming off the face support part 20, the movement of the chin rest part 22 can be quickly stopped without the need for complicated operations. Note that the predetermined touch operation for stopping the movement of the chin rest part 22 while the chin rest part 22 is moving is not limited to a swipe operation on the face image M, and may be, for example, a flick operation, a long press operation, a double tap operation, or the like on the monitor part 14.

[0093] In the ophthalmologic apparatus 1 of the first embodiment, after the movement of the chin rest 22 is completed and it is determined that the rough alignment is completed in step S17 shown in FIG. 4B, the process proceeds to step S18 and step S19, where it is determined whether or not a predetermined touch operation (long press operation on the face image M) is performed on the monitor unit 14. If it is determined that a long press operation is performed on the face image M, the process returns to step S6, where the examiner re-specifies the position of the examined eye. Then, the main control unit 17 re-moves the chin rest 22 using the new touch operation on the face image M as input information. That is, after the movement of the chin rest 22 is completed and before the alignment (fine alignment) for moving the measurement head 12 is performed, when the monitor unit 14 receives a predetermined touch operation (long press operation on the face image M), the main control unit 17 performs support control for re-moving the chin rest 22 using the new touch operation on the face image M as input information.

[0094] Therefore, before performing precision alignment by moving the measurement head 12, for example, when the subject's eye E is significantly out of the measurable range, the coarse alignment can be redone without the need for complicated operations. Note that the predetermined touch operation for redoing the coarse alignment before precision alignment is not limited to a long press operation on the face image M, and may be, for example, a swipe operation, a flick operation, a double tap operation, or the like on the monitor unit 14.

[0095] Furthermore, in the ophthalmic device 1 of Example 1, the main control unit 17 calculates the vertical distance (ΔY') from the shooting optical axis L3 to the test eye E on the facial image M as the movement distance of the chin rest portion 22 when moving the chin rest portion 22, based on the front-to-back distance (s) from the lens principal point A of the wide-angle camera 60 to the test eye E (designated position B of the test eye) on the facial image M, the front-to-back distance (s') from the lens principal point A to the test eye image position D, and the vertical distance (Δy') from the shooting optical axis L3 of the wide-angle camera 60 to the test eye image position D.

[0096] This allows the main control unit 17 to simply calculate the movement distance (ΔY′) when the chin rest portion 22 is moved, using the touch operation on the monitor portion 14 as input information.

[0097] In the ophthalmologic apparatus 1 of the first embodiment, when calculating the movement distance (ΔY') when moving the chin rest portion 22, it is assumed that the subject's eye E is located at the designated position B of the subject's eye, but in reality the subject's eye E is located at a position (actual position C of the subject's eye) displaced from the designated position B of the subject's eye. Therefore, the main control portion 17 calculates the movement correction distance (ΔY-ΔY') of the chin rest portion 22 based on the movement distance (ΔY') of the chin rest portion 22 and the vertical distance (ΔY) from the imaging optical axis L3 of the wide-angle camera 60 to the actual position C of the subject's eye.

[0098] As a result, when performing coarse alignment by moving the chin rest 22, the chin rest 22 can be moved according to the actual position of the subject's eye E, and the deviation in the Y-axis direction between the actual vertical position of the subject's eye E and the standard measurement position (second frame mark 42) can be further reduced. This improves the accuracy of the coarse alignment. Furthermore, during precise alignment by moving the measurement head 12 according to the position of the subject's eye E, the distance that the measurement head 12 moves can be reduced, making it possible to shorten the time required for precise alignment.

[0099] Furthermore, in the ophthalmologic apparatus 1 of Example 1, the main control unit 17 calculates the front-back distance (s+ΔZ) from the lens principal point A of the wide-angle camera 60 to the actual position C of the subject's eye E based on the vertical distance (ΔY) from the shooting optical axis L3 of the wide-angle camera 60 to the actual position C of the subject's eye and the movement correction distance (ΔY-ΔY') of the chin rest portion 22 for aligning the actual vertical position of the subject's eye E with the shooting optical axis L3.

[0100] This makes it possible to move the measurement head 12 in the front-back direction in advance according to the position of the subject's eye E, before precision alignment in which the measurement head 12 is moved according to the position of the subject's eye E. This makes it possible to suppress the distance the measurement head 12 moves during precision alignment, and shorten the time required for precision alignment.

[0101] The ophthalmic device of the present invention has been described above based on Example 1. However, the specific configuration is not limited to this Example, and design changes and additions are permitted as long as they do not deviate from the gist of the invention according to each claim in the claims.

[0102] In the first embodiment, as the support control of the movement of the face support part 20 (the chin rest part 22) performed by the main control part 17, an example has been shown in which the main control part 17 controls the drive mechanism 25 to automatically move the chin rest part 22 up and down. However, the support control of the movement of the face support part 20 is not limited to this. For example, when the examiner touches the chin rest up and down movement touch part T3 and the main control part 17 controls the drive mechanism 25 to move the chin rest part 22 using the touch operation on the chin rest up and down movement touch part T3 as input information, that is, when the chin rest part 22 is moved based on a manual operation, the main control part 17 may calculate the movement distance (ΔY′) of the chin rest part 22 in the Y-axis direction using the touch operation on the face image M captured by the wide-angle camera 60 as input information, and then display the movement distance of the chin rest part 22 and information on the movement target position of the chin rest part 22 on the display screen 40 of the monitor part 14 to perform the support control of the movement of the face support part 20.

[0103] In this way, the support control of the movement of the face support part 20 (chin rest part 22) performed by the main control part 17 not only automatically moves the chin rest part 22, but also includes presenting information necessary when moving the chin rest part 22, so that the examiner can move the chin rest part 22 smoothly when moving the chin rest part 22 by manual operation.

[0104] In this case, the examiner can visually confirm information such as the movement distance of the chin rest portion 22 displayed on the monitor unit 14, and perform a touch operation on the chin rest up and down movement touch unit T3 based on the visually confirmed information, thereby appropriately moving the chin rest portion 22 and performing rough alignment. Note that information such as the movement distance of the chin rest portion 22 may be notified to the examiner by voice or the like.

[0105] In the ophthalmologic apparatus 1 of the first embodiment, while the chin rest portion 22 is being moved (during rough alignment), a scale image 46 indicating the distance (movement distance) that the chin rest portion 22 has moved and the remaining movement distance (planned movement distance) of the chin rest portion 22 may be displayed on the monitor portion 14 as shown in Fig. 10. This allows the examiner to visually check the scale image 46 displayed on the monitor portion 14 and grasp the movement status of the chin rest portion 22 and how far the chin rest portion 22 will move remaining. This makes it possible to perform rough alignment by moving the chin rest portion 22 with peace of mind even through remote control or the like.

[0106] Furthermore, when the scale image 46 is displayed on the monitor unit 14, as shown in Fig. 10, the jaw image M' (an image of a region of the face image M including at least the jaw of the subject P) may be displayed in the center of the display screen 40, and the scale image 46 may be displayed in accordance with the position of the jaw of the subject P shown in the jaw image M'. This allows the examiner to more easily grasp the positional relationship between the subject P and the face support unit 20, and allows for smooth rough alignment.

[0107] The main control unit 17 may display the movement distance or the planned movement distance of the chin rest portion 22 not only by the scale image 46 shown in FIG. 10 but also by numerical values ​​or the like.

[0108] In addition, in the first embodiment, an example has been shown in which the top plate 31 of the optical table 30 on which the measuring head 12 is placed is not raised or lowered when the chin rest 22 is moved. However, this is not limited to this. For example, the main control unit 17 sets the elevation state of the top plate 31 according to the moving state of the chin rest 22 of the face support unit 20. Then, according to the set elevation state of the top plate 31, the lifting mechanism 32 of the optical table 30 may be driven and controlled to raise or lower the top plate 31 of the optical table 30. In other words, the optical table 30 and the chin rest 22 may be "moved in coordination."

[0109] This eliminates the need to adjust the position of the optical table 30 and the position of the chin rest 22 separately, and allows rough alignment to be performed by the coordinated movement of the optical table 30 and the chin rest 22. This prevents, for example, the face of the subject P from moving up and down significantly during rough alignment, causing discomfort, or preventing the chin from coming off the chin rest 22, and allows the face of the subject P to be stably supported without imposing a physical burden on the subject P. In addition, the height of the measurement head 12 and the subject's eye E can be efficiently adjusted. Note that the optical table 30 may be movable not only up and down but also forward and backward and left and right (three-dimensional directions), and the optical table 30 and the chin rest 22 may be "coordinated" in any of the three-dimensional directions.

[0110] Furthermore, in the first embodiment, it is not determined whether the chin of the subject P is supported during the movement of the chin rest 22, but this is not limited thereto. For example, the main control unit 17 determines whether the subject P places his / her face on the chin rest 22 based on the detection value by the detection sensor 26 (contact sensor) of the face support unit 20 during the movement of the chin rest 22. Then, when it is determined that the subject P does not place his / her face on the chin rest 22 (the chin is removed from the chin rest 22), the main control unit 17 may stop the movement of the chin rest 22 and interrupt the rough alignment. Furthermore, after the interruption of the rough alignment, when it is determined that the subject P places his / her face on the chin rest 22, the main control unit 17 may resume the movement of the chin rest 22. That is, the main control unit 17 may perform support control of the movement of the chin rest 22 using the detection result of the detection sensor 26 as input information.

[0111] As a result, if an unexpected event occurs during the movement of the chin rest portion 22, the movement of the chin rest portion 22 can be automatically controlled without the examiner performing any operation. This reduces the burden of operation on the examiner. Note that the detection sensor 26 only needs to detect the support state of the subject P by the face support portion 20, so the detection sensor 26 may be provided in the forehead rest portion 24, and the main control portion 17 may determine whether the subject P is placing his / her forehead against the forehead rest portion 24.

[0112] In the ophthalmologic apparatus 1 of the first embodiment, an example has been shown in which the facial image M captured by the wide-angle camera 60 includes the left and right eyes E and the chin of the subject P. However, the facial image M may be an image including at least the left and right eyes E of the subject P, and the chin of the subject P may or may not be captured by an image capturing means other than the wide-angle camera 60.

[0113] In the ophthalmic apparatus 1 of the first embodiment, the monitor unit 14 that receives a touch operation on the face image M is attached to the ophthalmic apparatus body 2. However, the monitor unit 14 may be detachable from the ophthalmic apparatus body 2, and the examiner may hold and operate the monitor unit 14. In addition, a controller such as a tablet terminal, an information terminal such as a smartphone, or a dedicated terminal that has a display unit and an operation unit such as a touch panel or a keyboard may be provided separately from the monitor unit 14, and the controller may be used as the monitor unit. In this case, a screen (including the face image M) similar to the screen displayed on the display screen 40 of the monitor unit 14 is displayed on the display unit of the controller. This allows the examiner to hold the monitor unit 14 or the controller and appropriately specify the position of the subject's eye E from a desired location away from the ophthalmic apparatus body 2.

[0114] In the ophthalmic apparatus 1 of the first embodiment, an example of a composite measurement head having a CT measurement head 12a and a KR measurement head 12b is shown as the measurement head 12. However, the measurement head 12 is not limited to a composite measurement head, and may be a single measurement head. Furthermore, the type of the measurement head 12 is not limited to the CT measurement head 12a or the KR measurement head 12b, and may be various measurement heads applied to the ophthalmic apparatus 1, such as a corneal shape measurement head, a fundus photography head, an axial length measurement head, an endothelial cell measurement head, etc.

[0115] In the ophthalmologic apparatus 1 of the first embodiment, the wide-angle camera 60 is configured to include a cylindrical housing, a wide-angle lens, and an image sensor. However, the wide-angle camera 60 may be configured to include a pinhole aperture, a focusing lens means, or the like to increase the focal depth.

[0116] 1 Ophthalmology equipment 2 Ophthalmology device body 10 Main body 12 Measuring head 12a CT measuring head 12b KR measuring head 14 Monitor section 40 display screen 17 Main control unit (control unit) 19 Control section 20 Face support 22 Chin rest 24 Forehead support 60 Wide-angle camera E. Examined eye M face image M1 Enlarged Image P Subject

Claims

1. A measurement head for measuring the subject's eye; a face support unit that supports the face of the subject and is provided so as to be movable relative to the measurement head; and a wide-angle camera that captures a facial image including the left and right test eyes of the subject supported by the face support unit. a touch panel type monitor unit that displays the face image captured by the wide-angle camera and receives touch operations on the face image; a control unit that performs support control of the movement of the face support unit using the touch operation received by the monitor unit as input information, and then moves the measurement head according to the position of the subject's eye; Equipped with The control unit calculates the vertical distance from the shooting optical axis of the wide-angle camera to the test eye based on the forward / backward distance from the lens principal point of the wide-angle camera to the test eye, the forward / backward distance from the lens principal point to the image of the test eye captured by the wide-angle camera, and the vertical distance from the shooting optical axis of the wide-angle camera to the image of the test eye.

2. 2. The ophthalmic apparatus according to claim 1, The control unit stops the movement of the face support unit when the monitor unit receives a predetermined touch operation while the face support unit is moving. An ophthalmic apparatus comprising:

3. In the ophthalmic apparatus according to claim 1 or 2, When the monitor receives a predetermined touch operation after the movement of the face support unit is completed and before the measurement head is moved according to the position of the subject's eye, the control unit performs support control for re-moving the face support unit using a new touch operation on the face image displayed on the monitor as input information. An ophthalmic apparatus comprising:

4. The ophthalmic apparatus according to any one of claims 1 to 3, The control unit causes at least one of a moving distance of the face support unit or a planned moving distance of the face support unit to be displayed on the monitor unit while the face support unit is moving. An ophthalmic apparatus comprising:

5. The ophthalmic apparatus according to any one of claims 1 to 4, The measuring head is placed on an optical table that is movable in three dimensions; The control unit moves the optical table in accordance with the moving state of the face support unit. An ophthalmic apparatus comprising:

6. The ophthalmic apparatus according to any one of claims 1 to 5, the face support unit has a contact sensor that detects a contact state of the subject's face, The control unit performs support control of the movement of the face support unit using a detection result of the contact sensor as input information while the face support unit is moving. An ophthalmic apparatus comprising:

7. An ophthalmic device according to any one of claims 1 to 6, The control unit calculates a movement correction distance of the face support unit for matching the vertical position of the subject's eye with the imaging optical axis, based on a movement distance of the face support unit and a vertical distance from the imaging optical axis to the subject's eye. An ophthalmic apparatus comprising:

8. The ophthalmic device according to claim 7, The control unit calculates a distance in a front-rear direction from the lens principal point to the subject's eye based on a distance in a vertical direction from the imaging optical axis to the subject's eye and a movement correction distance of the face support unit. An ophthalmic apparatus comprising:

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