JP7612467B2 - Ophthalmic Equipment - Google Patents

Description

The present invention relates to an ophthalmic device.

Conventionally, there has been known an ophthalmologic device that photographs the face of a subject, including the left and right eyes, and displays the photographed face image on a monitor (see, for example, Patent Documents 1 and 2).

Japanese Patent Application Publication No. 10-216089 JP 2017-196305 A

However, in conventional ophthalmic devices, the imaging means (camera) for capturing facial images is installed near the measurement head that measures the subject's eye. As a result, the image capturing the facial image is a wide-angle image, and the image of the subject's eye is relatively small, making it difficult to properly recognize the position of the subject's eye and move the face support unit.

The present invention was made in response to the above problem, and aims to provide an ophthalmic device that can control the movement of a face support unit based on an appropriately recognized position of the subject's eye.

In order to achieve the above object, the ophthalmologic apparatus of the present invention includes a measurement head for measuring the subject's eye, a face support unit that supports the face of the subject and is movable relative to the measurement head, a wide-angle camera that takes a face image including the left and right eyes of the subject supported by the face support unit, a touch panel monitor unit that displays the face image taken by the wide-angle camera and accepts touch operations on the face image, and a control unit that uses the touch operations accepted by the monitor unit as input information to perform support control of the movement of the face support unit and then moves the measurement head according to the position of the eye.The control unit calculates the vertical distance from the imaging optical axis to the eye based on the front-back distance from the lens principal point of the wide-angle camera to the eye, the front-back distance from the lens principal point to the image of the eye captured by the wide-angle camera, and the vertical distance from the imaging optical axis of the wide-angle camera to the image of the eye.

Therefore, the ophthalmic device of the present invention can perform movement support control of the face support unit based on the properly recognized position of the subject's eye.

1 is a perspective view showing an external appearance of an ophthalmic apparatus according to a first embodiment. 1 is a side view showing an external appearance of an ophthalmic apparatus according to a first embodiment. FIG. 2 is a block diagram showing a control system in the ophthalmic apparatus of the first embodiment. 5 is a flowchart showing a procedure for measuring examination information using the ophthalmologic apparatus of the first embodiment. 5 is a flowchart showing a procedure for measuring examination information using the ophthalmologic apparatus of the first embodiment. 11A and 11B are diagrams illustrating an example of a display screen when a face image is displayed on a monitor unit. 13A and 13B are diagrams showing other display examples of the display screen when a face image is displayed on the monitor unit. 13 is a diagram showing a display example of a display screen when an examiner specifies the position of an eye to be examined on a face image. FIG. FIG. 13 is a diagram showing an example of a display screen when rough alignment is completed; 11 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. 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.

Below, a form for implementing the ophthalmic device of the present invention will be described based on Example 1 shown in the drawings.

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".

In this specification, the X-axis, Y-axis, and Z-axis are taken as shown in each figure, and the explanations in the specification are based on the left-right direction (positive X-axis direction is rightward, negative X-axis direction is leftward), front-rear direction (positive Z-axis direction is backward, negative Z-axis direction is forward), and up-down direction (positive Y-axis direction is upward, negative Y-axis direction is downward, sometimes called height direction) in FIG. 1. In addition, the subject P side (negative Z-axis direction) is defined as the front of the ophthalmic device 1, the side facing the subject P (positive Z-axis direction) as the back of the ophthalmic device 1, the right side of the subject P (positive X-axis direction) as the right side of the ophthalmic device 1, and the left side of the subject P (negative X-axis direction) as the left side of the ophthalmic device 1.

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

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.

As shown in FIG. 2, the base unit 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.

As shown in FIG. 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 reflective and keratometric measurements of each of the left and right test eyes E of the subject P.

Here, "Reflection measurement" refers to measuring the spherical refractive power, cylindrical refractive power, and astigmatism axis angle of the subject's eye E. "Keratometry" 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 also be equipped with a function to calculate an intraocular pressure correction value that takes into account the effect of corneal thickness on intraocular pressure.

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, a light source for illuminating the anterior eye and for measuring the membrane shape is arranged in a ring shape on the front of the measurement head 12.

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 the image displayed on the display screen 40 and the contact position in association with each other.

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.

The base 11, measurement head 12, and monitor 14 of the main body 10 are electrically connected. In addition, as shown in FIG. 3, the main body 10 is electrically connected to the face support 20 and the optical table 30. This enables communication of data and operation instructions between the base 11, measurement head 12, and monitor 14, and further between the main body 10, face support 20, and 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, monitor 14, face support 20, and 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.

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.

As shown in FIG. 3, the main control unit 17 is connected to 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. The main control unit 17 loads the program stored in the memory unit 18 or the internal memory 17a onto, for example, a ROM, and centrally controls each part of the ophthalmic device 1 in response to an operation input signal from the operation unit 19.

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

The operation unit 19 further includes a touch panel display screen 40 of the monitor unit 14. That is, the monitor unit 14 displays various icons, an operation touch unit, a keyboard, a facial 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 facial images M that it displays. The 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 part of the ophthalmic device 1 using the touch operations accepted on the display screen 40 of the monitor unit 14 as input information.

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.

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

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 arranged to be movable up and down relative to the base 21, allowing it to be movable up and down relative to the main body 10, and the face of the subject P placed on the chin rest 22 can be moved relatively to the measurement head 12. However, in another different embodiment, the entire face support part 20 may be configured to be movable up and down relative to the main body 10, allowing the face of the subject P to be moved up and down relative to the measurement head 12.

The forehead rest 24 is a member against which the forehead of the subject P rests. In Example 1, the forehead rest 24 is provided on a pair of support pillars 23, and its position in the front-to-back direction is fixed. However, in another embodiment, the position of the forehead rest 24 may be freely adjusted in the front-to-back direction. The front-to-back position adjustment of the forehead rest 24 may also be configured to be performed by an appropriate drive mechanism (face support moving mechanism), allowing automatic adjustment by program or adjustment by operation input signal from the operation unit 19. It may also be configured to allow manual adjustment.

The subject P faces the ophthalmic device main body 2 while seated on an examination chair 50 or the like placed in front of (in front of) the ophthalmic device main body 2, places his/her chin on the chin rest 22, and presses his/her forehead against the forehead rest 24 to stabilize his/her face (head) to receive the measurement of the 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 placing 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 sitting in the wheelchair and placing his/her face against the face support part 20.

The face support section 20 may be of 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 while the examination information of the subject's eye E is being measured. As another different embodiment, for example, the face support section 20 may be configured to have only one of the chin rest section 22 and the forehead rest section 24. If only the forehead rest section 24 is included, this forehead rest section 24 (or the entire face support section 20) can be freely moved in the vertical direction, etc., by a specified drive mechanism.

The drive mechanism 25 is composed of a known drive mechanism, for example, a drive mechanism including a stepping motor, or a drive mechanism including a DC motor and a potentiometer. When driven, the drive mechanism 25 moves the chin rest 22 in a predetermined upward or downward direction at a predetermined speed by a predetermined distance (amount of movement).

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

In Example 1, the main control unit 17 functions as a face support unit control unit, but this is not limited thereto, 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.

The optical table 30 includes a top plate 31 on which the ophthalmic device 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 drive 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 device 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 also set to a height corresponding to measurement in a seated position. On the other hand, the ophthalmic device 1 may also perform measurement while the subject P is standing (standing position). In this case, it is not necessary to provide an examination chair 50, and the optical table 30 is set to a height corresponding to measurement in a standing position.

The lifting mechanism 32 is controlled by the table control unit 33 to raise and lower the top plate 31. This allows the height of the top plate 31 to be adjusted according to the height and chin position of the subject P. The lifting mechanism 32 is equipped with a lifting rod 32a that supports the top plate 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.

The driving unit 32c is, for example, an electric type composed of an electric actuator, but is not limited to this configuration. The driving unit 32c can be a hydraulic type, pneumatic type, screw type, link type, or other known lifting mechanism.

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 to easily move the ophthalmic device 1 together with the optical table 30 to the desired installation location, and at the installation location, the casters 36a can be locked to stably install the ophthalmic device 1 to prevent unexpected movement.

The table control unit 33 is configured with a microprocessor, an internal memory 33a consisting of RAM, ROM, flash memory, etc. The table control unit 33 is electrically connected to the lifting mechanism 32, the power button 34, and the 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 these operations are performed, an operation input signal for raising or lowering is sent to the table control unit 33.

The table control unit 33 receives an 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 plate 31 (optical table 30) in the vertical direction. In 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 plate 31 in the vertical direction.

The examination chair 50 may be a known chair that allows the height of the seat 51 to be adjusted. 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 able to adjust the height of the seat 51 independently without linking with the ophthalmic device main body 2 or the optical table 30, but is not limited to this. For example, the seat 51 may be configured to move up and down, etc., according to a touch operation on the display screen 40 of the monitor unit 14. Also, the chin rest unit 22, the optical table 30, and the examination chair 50 may be configured to be moved and controlled so as to be appropriately positioned, under the control of the main control unit 17.

The wide-angle camera 60 has a cylindrical housing, a wide-angle lens, and an image sensor, and is a single camera that captures a facial image M including the left and right test 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 arranged 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/horizontal direction). In addition, the wide-angle camera 60 is arranged at an intermediate 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/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 to capture images during the initial stage from when the power is turned on until rough alignment is completed, and until measurements are completed by the CT measuring head 12a and the KR measuring head 12b, or may interrupt capture as appropriate.

The vertical angle of view of the wide-angle camera 60 in the Y-axis direction (vertical direction) is set so that the subject's eye E and the chin of the subject P, whose positions differ 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 that the subject's eye E enters during measurement by the CT measurement head 12a as the upper limit of the vertical angle of view and the line that the subject's eye E enters during measurement by the KR measurement head 12b as the lower limit of the vertical angle of view. In Example 1, the vertical angle of view of the wide-angle camera 60 is set to an angle of, for example, 70° or more.

The horizontal angle of view of the wide-angle camera 60 in the X-axis direction (horizontal direction) is set to an angle that captures the other eye when either the left or right subject 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. In Example 1, the horizontal angle of view of the wide-angle camera 60 is set to an angle of, for example, 90° or more.

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 that includes a wide-angle camera equipped with a wide-angle lens that can capture 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. Furthermore, wide-angle lenses and ultra-wide-angle lenses are different in that they correct the distortion that occurs when capturing a wide angle range, whereas a fisheye lens captures the distortion as it is without correcting it. However, a fisheye lens can be considered a type of ultra-wide-angle lens in the sense that it is a lens that can capture a wide angle range.

Below, an example of the operation from when the ophthalmic device 1 of Example 1 is turned on to when the measurement of the specified test information is completed will be described with reference to Figures 4A to 8. Note that the measurement procedure shown in the flowcharts of Figures 4A and 4B is based on the premise that the test information of the left and right test eyes E of one subject P is measured, and is started when the ophthalmic device 1 is turned on.

In step S1, when the examiner turns on the power of the ophthalmic device 1 (the ophthalmic device 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.

In step S2, following the movement of the measurement 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.

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 test eyes E and the chin of the subject P using the wide-angle camera 60. Note that capturing images using the wide-angle camera 60 continues until the specified measurement is completed.

In step S4, following the start of capturing the facial image M in step S3, the main control unit 17 causes the facial image M captured by the image sensor 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. The main control unit 17 also causes the display screen 40 to display 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 the standard position of the subject's eye relative to the first frame mark 41 (standard measurement position), superimposed on the facial image M.

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 (e.g., 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 test eyes E and the chin of the subject P (e.g., an entire image of the facial image M), as shown in FIG. 6. The facial image M is displayed in a rectangular first display area 40a set in the center of the display screen 40.

When displaying an area of the facial image M that does not include the chin of the subject P in the first display area 40a, the main control unit 17 causes the display screen 40 to display an image of at least the area of the facial image M captured by the imaging element of the wide-angle camera 60 that includes the chin of the subject P (for example, the lower image of the facial image M, hereinafter referred to as "chin image M'"), as shown in FIG. 5. The chin image M' is displayed in the second display area 40b set below the first display area 40a.

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 up-down movement touch area T3 for moving the chin rest 22 up and down based on a manual operation, a mode setting touch area T4 (mode setting icon) for setting the 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-back touch area T7 for moving the measurement head 12 in the front-back direction (Z-axis direction) based on a manual operation, and an A/M touch area T8 for switching between automatic mode and manual mode. The icons displayed in the third display area 40c are not limited to those shown in FIG. 5 and FIG. 6, and other icons as necessary are displayed as appropriate.

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 one of the first measurement mode in which the CT measurement head 12a measures intraocular pressure and corneal thickness, the second measurement mode in which the KR measurement head 12b measures reflex and keratometry, and the third measurement mode in which the CT measurement head 12a measures intraocular pressure and corneal thickness, and the KR measurement head 12b measures reflex 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.

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 the position of the subject's eye E in the XY directions on the image. The touch operation on the first display area 40a is accepted by the monitor unit 14.

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

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 on the display screen 40, which is determined based on the contact position on the monitor unit 14. As shown in FIG. 7, the enlarged image M1 is displayed, for example, in the fourth display area 40d set adjacent to the second display area 40b. In addition, the tap mark 43 is superimposed on the enlarged image M1. The enlarged image M1 is a still image at the time 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.

In step S9, following the display of the enlarged image M1 in step S8, the main controller 17 determines whether the monitor unit 14 has received a predetermined touch operation (a tap operation on the face image M) twice. If the main controller 17 determines that the monitor unit 14 has not received two touch operations, the process returns to step S6. If the main controller 17 determines 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 test eyes E are respectively specified by the examiner.

In step S10, following the determination in step S9 that two touch operations (tap operations) have been received, the main control unit 17 sets the order of measurements of the left and right test 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 test eye E is specified 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. In other words, 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.

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 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 22 in the Y-axis direction, the vertical distance (ΔY') from the imaging 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 method for calculating ΔY' will be described later.

In step S12, following the calculation of ΔY' in step S11 or the determination that the coarse alignment is incomplete 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 coarse alignment is started using a touch operation on the face image M captured by the wide-angle camera 60 as input information. Note that coarse alignment refers to moving the chin rest 22 to bring the positional deviation between the subject's eye E and the measurement head 12 within the movable range of the measurement head 12 in the X, Y and Z directions.

In step S13, following the control of movement of the chin rest 22 in step S12 (start of execution of rough alignment), the main control unit 17 determines 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). 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 determines 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.

In step S14, following the determination in step S13 that the touch operation (tap operation) on the enlarged image M1 has been received, 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. The main controller 17 then moves the chin rest 22 in the Y-axis direction, using the newly calculated ΔY' as a target value.

In step S15, following the determination in step S13 that a touch operation (tap operation) on the enlarged image M1 has not been received or the correction of the rough alignment in step S14, the main control unit 17 determines whether the monitor unit 14 has received 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 received 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 received a touch operation (a swipe operation on the face image M), the main control unit 17 proceeds to step S16.

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 unit 22. In other words, the coarse alignment is interrupted. Then, an error message is displayed on the display screen 40, prompting the examiner to re-specify the position of the examined eye (touch operation on the face image M), and the process returns to step S6. This allows the examiner to re-specify the position of the examined 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.

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

When the chin rest 22 is moved in the Y-axis direction by ΔY' 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 test eye E on the image and the standard measurement position (second frame mark 42) becomes smaller, as shown in FIG. 8. However, ΔY' is a value calculated based on the test eye position on the image specified by the examiner touching the face image M (hereinafter referred to as "test eye designated position B", see FIG. 9). In other words, as shown in FIG. 9, the actual position of the test eye E (test eye actual position C) is shifted by ΔY-ΔY' in the Y-axis direction from the test eye designated position B. Furthermore, the test eye actual position C is shifted by ΔZ in the Z-axis direction from the test eye designated position B. Here, "ΔY" is the actual deviation distance in the Y-axis direction between the test eye actual 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 to align the actual vertical position of the subject's eye E with the imaging 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.

As a result, after the rough alignment is completed, the chin rest 22 can be moved further 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 beforehand prior to the fine alignment described below, the time required for fine alignment can be shortened. A detailed method for calculating ΔY-ΔY' and ΔZ will be described later.

In step S18, following the determination in step S17 that the rough alignment is complete or the determination in step S24 that the measurement is not complete, 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 of 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.

In step S19, following the switching of the fourth display area 40d in step S18, the main controller 17 determines 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 examined eye and redo the rough alignment. At this time, the main controller 17 may display a message on the display screen 40 prompting the examiner to re-designate the position of the examined eye (touch operation on the face image M).

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.

In step S21, following the specification of a feature point on the screen by the examiner in step S20 or the determination in step S22 that precision alignment is incomplete, the main controller 17 moves the CT measuring head 12a or the KR measuring head 12b used for measurement according to the measurement mode set in step S5, and performs automatic adjustment of precision alignment for the specified 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).

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/driving circuit 16 based on the calculated distance value. Then, based on the calculated distance value, the measuring head 12 (CT measuring head 12a or KR measuring head 12b) is moved in the up/down/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.

In step S22, following the automatic adjustment of the precision alignment in step S21, the main control unit 17 determines whether the precision alignment is complete. 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.

In step S23, following the determination of completion of the precision 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 while measuring 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.

In step S24, following the measurement of the subject's eye E in step S23, the main control unit 17 stores the measurement results in the memory unit 18 and determines whether or not all necessary measurements have been completed. If the measurement of the 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.

The method of calculating ΔY' in step S11 and the method of calculating ΔY-ΔY' and ΔZ in step S17 will be described below 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).

9, 61 indicates the photographing optical system of the wide-angle camera 60, the straight line L3 indicates the photographing optical axis of the photographing optical system 61, and point A indicates the lens principal point of the photographing optical system 61. 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. Point C indicates the actual position of the subject's eye E (actual position of the subject's eye). 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 "image position of the subject's eye"). 9, "s" is the distance in the front-back direction (Z-axis direction) from the lens principal point A of the imaging optical system 61 to the designated position B of the subject's eye. "s'" in FIG. 9 is the distance (focal length) in the front-back direction (Z-axis direction) from the lens principal point A of the imaging optical system 61 to the image sensor 62 of the wide-angle camera 60.

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 position D of the image of the subject's eye. “Δy′” is detected from the image of the subject's eye captured by the image sensor 62.

9, the movement distance ΔY' of the chin rest 22 is the vertical distance from the imaging optical axis L3 of the wide-angle camera 60 to the subject's eye E on the facial image M. In other words, the main control unit 17 calculates the vertical distance (ΔY') from the imaging optical axis L3 to the subject's eye E on the facial image M (designated position B of the subject's eye) 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 on the facial image M (designated position B of the subject's eye), 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 imaging optical axis L3 of the wide-angle camera 60 to the subject's eye image position D.

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)

Further, 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)

Here, "Δy2'" is the vertical (Z-axis) distance from the imaging optical axis L3 of the imaging 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. The deviation distance in the Y-axis between the actual position C of the subject's eye and the designated position B of the subject's eye 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 imaging 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 imaging optical axis L3 of the wide-angle camera 60 to the actual position C of the subject's eye.

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.

As a result, the vertical distance (ΔY) from the imaging optical axis L3 of the wide-angle camera 60 to the actual test eye E before rough alignment can be determined.

Furthermore, by determining the front-rear distance ΔZ from the designated position B of the test eye to the actual test eye E, the front-rear distance (s+ΔZ) from the lens principal point A of the wide-angle camera 60 to the actual test eye E before rough alignment can be determined. In other words, the main control unit 17 calculates the front-rear distance (s+ΔZ) from the lens principal point A of the wide-angle camera 60 to the actual test 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 test eye and the movement correction distance (ΔY-ΔY') of the chin rest unit 22 for aligning the actual vertical position of the test eye E with the imaging optical axis L3.

The following describes the characteristic functions of the ophthalmic device 1 of the first embodiment.

The ophthalmic device 1 of the first embodiment includes a measurement head 12 that measures the subject's eye E, a face support unit 20 that supports the face of the subject P and is 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 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 uses the touch operations accepted by the monitor unit 14 as input information to support and control the movement of the chin rest unit 22 of the face support unit 20 relative to the measurement head 12.

That is, when the ophthalmic 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 facial 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 facial image M captured by the wide-angle camera 60, the image of the subject's eye E becomes relatively small, making it difficult to properly recognize the position of the subject's eye E in image processing.

In contrast, in the ophthalmologic apparatus 1 of Example 1, the process proceeds to step S5 and step S6, and once the examiner's touch operation (tap operation) on the facial image M specifies the XY position of the subject's eye E on the image, the process proceeds to step S7, step S8, and step S9. Furthermore, once the examiner performs two touch operations on the facial image M to specify the XY positions of the left and right subjects' 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 facial image M, and the movement distance (ΔY') of the chin rest portion 22 in the Y-axis direction is calculated. The process then proceeds to step S12, where the chin rest portion 22 is moved in the Y-axis direction to perform coarse alignment.

In this way, the main control unit 17 sets the position of the subject's eye E based on the examiner's touch operation on the facial image M, calculates the movement distance (ΔY') of the chin rest portion 22 in the Y-axis direction, and moves the chin rest portion 22 to perform rough alignment. Therefore, even if the image of the subject's eye E is relatively small in the facial image M and it is difficult to recognize the subject's eye E by image processing, the main control unit 17 can support and control the movement of the face support unit 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 unit 14 as input information.

In the ophthalmologic apparatus 1 of Example 1, when the monitor unit 14 receives a predetermined touch operation (a swipe operation on the face image M) while the chin rest unit 22 is moving, the main control unit 17 stops the movement of the chin rest unit 22 and interrupts the coarse alignment. That is, after starting the coarse alignment by moving the chin rest unit 22 in step S12 of the flowchart shown in FIG. 4B, the process proceeds to step S13, step S14, and step S15, and if it is determined that a swipe operation on the face image M has been performed, the process proceeds to step S16, stops the movement of the chin rest unit 22, and interrupts the coarse alignment.

As a result, even if an unexpected event occurs, such as the subject P's face coming off the face support part 20, the movement of the chin rest part 22 can be stopped quickly without the need for complicated operations. Note that the predetermined touch operation for stopping the movement of the chin rest part 22 while it 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.

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) has been performed on the monitor unit 14. If it is determined that a long press operation has been 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. In other words, 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.

Therefore, before performing fine alignment by moving the measurement head 12, for example, when the subject's eye E is significantly outside the measurable range, the coarse alignment can be redone without the need for complicated operations. Note that the specified touch operation for redoing the coarse alignment before fine alignment is not limited to a long press operation on the face image M, but may also be, for example, a swipe operation, flick operation, double tap operation, etc. on the monitor unit 14.

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

This allows the main control unit 17 to simply calculate the movement distance (ΔY') when moving the chin rest unit 22 using the touch operation on the monitor unit 14 as input information.

In addition, in the ophthalmic device 1 of Example 1, 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 it is located at a position (actual position C of the subject's eye) shifted from the designated position B of the subject's eye. Therefore, the main control unit 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.

As a result, when performing coarse alignment by moving the chin rest portion 22, the chin rest portion 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.

Furthermore, in the ophthalmic device 1 of Example 1, the main control unit 17 calculates the front-rear 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 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 subject's eye and the movement correction distance (ΔY-ΔY') of the chin rest unit 22 to align the actual vertical position of the subject's eye E with the imaging optical axis L3.

This makes it possible to move the measurement head 12 in the forward and backward directions in advance according to the position of the test eye E, before precision alignment in which the measurement head 12 is moved according to the position of the test eye E. This makes it possible to reduce the distance that the measurement head 12 moves during precision alignment, thereby shortening the time required for precision alignment.

The ophthalmic device of the present invention has been described above based on Example 1, but 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 as claimed in each claim of the patent.

In the first embodiment, the main control unit 17 controls the drive mechanism 25 to automatically move the chin rest 22 up and down as the support control of the movement of the face support unit 20 (chin rest 22). However, the support control of the movement of the face support unit 20 is not limited to this. For example, when the examiner touches the chin rest up and down movement touch unit T3 and the main control unit 17 controls the drive mechanism 25 to move the chin rest 22 using the touch operation on the chin rest up and down movement touch unit T3 as input information, that is, when the chin rest 22 is moved based on manual operation, the main control unit 17 calculates the movement distance (ΔY') of the chin rest 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 displays the movement distance of the chin rest 22 and information on the movement target position of the chin rest 22 on the display screen 40 of the monitor unit 14, thereby supporting the movement of the face support unit 20.

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 moves the chin rest part 22 automatically, but also includes presenting information required 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.

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 visual 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.

In the ophthalmic device 1 of Example 1, while the chin rest 22 is being moved (during coarse alignment), as shown in FIG. 10, a scale image 46 indicating the distance that the chin rest 22 has moved (movement distance) and the remaining movement distance (planned movement distance) of the chin rest 22 may be displayed on the monitor unit 14. This allows the examiner to visually check the scale image 46 displayed on the monitor unit 14 and grasp the movement status of the chin rest 22 and how far the chin rest 22 will move remaining. This makes it possible to perform coarse alignment by moving the chin rest 22 with peace of mind even when using remote control, etc.

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 an area of the face image M that includes 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 aligned with the position of the jaw of the subject P shown in the jaw image M'. This makes it easier for the examiner to grasp the positional relationship between the subject P and the face support unit 20, and allows for smooth rough alignment.

The main control unit 17 may display the movement distance and planned movement distance of the chin rest portion 22 not only using the scale image 46 shown in FIG. 10, but also using numerical values, etc.

In addition, in Example 1, an example was shown in which the top plate 31 of the optical table 30 on which the measurement 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 movement 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."

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. For this reason, for example, it is possible to prevent the subject P's face from moving significantly up and down during rough alignment, causing discomfort, or preventing the chin from coming off the chin rest 22, and to stably support the subject P's face 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 adjusted efficiently. 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.

In addition, in the first embodiment, the subject P's chin is not judged to be supported during the movement of the chin rest 22, but the present invention is not limited to this. For example, the main control unit 17 judges 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 the main control unit 17 judges 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, when the main control unit 17 judges that the subject P places his/her face on the chin rest 22 after the interruption of the rough alignment, the main control unit 17 may resume the movement of the chin rest 22. In other words, 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.

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 having to perform any operation. This reduces the burden of operation on the examiner. Note that the detection sensor 26 only needs to detect the state in which the subject P is supported by the face support portion 20, so the detection sensor 26 may be provided in the forehead support portion 24, and the main control portion 17 may determine whether or not the subject P is placing his or her forehead against the forehead support portion 24.

In addition, in the ophthalmologic apparatus 1 of Example 1, an example has been shown in which the facial image M captured by the wide-angle camera 60 includes the left and right test eyes E and the chin of the subject P. However, it is sufficient that the facial image M is an image that includes at least the left and right test eyes E of the subject P, and the chin of the subject P may or may not be captured by a capturing means other than the wide-angle camera 60.

In the ophthalmic device 1 of Example 1, the monitor unit 14 that receives touch operations on the face image M is attached to the ophthalmic device main body 2. However, the monitor unit 14 may be detachable from the ophthalmic device main 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 keyboard may be provided separately from the monitor unit 14, and the controller may be used as the monitor unit. In this case, the display unit of the controller displays a screen (including the face image M) similar to the screen displayed on the display screen 40 of the monitor unit 14. 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 device main body 2.

In the ophthalmic device 1 of Example 1, 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 device 1, such as a corneal shape measurement head, a fundus photography head, an axial length measurement head, an endothelial cell measurement head, etc.

In the ophthalmic device 1 of Example 1, an example is shown in which the wide-angle camera 60 is configured to have a cylindrical housing, a wide-angle lens, and an image sensor. However, the wide-angle camera 60 may also be configured to include an additional pinhole aperture, focusing lens means, etc., in order to increase the focal depth.

1 Ophthalmic apparatus 2 Ophthalmic apparatus main body 10 Main body section 12 Measuring head 12a CT measuring head 12b KR measuring head 14 Monitor section 40 Display screen 17 Main control section (control section)
19 Operation unit 20 Face support unit 22 Chin rest unit 24 Forehead rest unit 60 Wide-angle camera E Subject's eye M Face image M1 Enlarged image P Subject

Claims (8)

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. The ophthalmic apparatus according to claim 1,
The ophthalmologic apparatus according to claim 1, wherein 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. In the ophthalmic apparatus according to claim 1 or 2,
The control unit performs support control for re-moving the face support unit, when the monitor unit 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 test eye, by using a new touch operation on the face image displayed on the monitor unit as input information. The ophthalmic apparatus according to any one of claims 1 to 3,
The ophthalmologic apparatus according to claim 1, wherein the control unit causes the monitor unit to display at least one of a moving distance of the face support unit and a planned moving distance of the face support unit while the face support unit is moving. 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 ophthalmologic apparatus according to claim 1, wherein the control unit moves the optical table in accordance with a moving state of the face support unit. 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 ophthalmologic apparatus according to claim 1, wherein 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. The ophthalmic apparatus according to any one of claims 1 to 6 ,
an ophthalmic device characterized in that the control unit calculates a movement correction distance of the face support unit to align the vertical position of the test 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 test eye. 8. The ophthalmic apparatus according to claim 7 ,
the control unit calculates a front-rear distance from the lens principal point to the test eye based on a vertical distance from the imaging optical axis to the test eye and a movement correction distance of the face support unit.