Ophthalmic devices

Abstract

To provide an ophthalmologic device that acquires image information on a position of a safety stopper for an eye to be examined when measuring an intraocular pressure by a first measurement head.SOLUTION: An ophthalmologic device includes: a CT measurement head 12a for measuring an intraocular pressure of an eye E to be examined of a subject P; an RM measurement head 12b, which is an eye characteristic measurement head other than the intraocular pressure of the eye E to be examined, for executing alignment position adjustment in three axial directions for the eye E to be examined at the time of measurement; a monitor part 14 for displaying an image on a display screen 40; and a main control part 17 for controlling each part of the device. The main control part 17 calculates a safety stopper position As where front-back directional approach of the CT measurement head 12a is permitted to the eye E to be examined on the basis of result information on a Z-axis alignment position A1 of the RM measurement head 12b for the eye E to be examined, and when the safety stopper position As is calculated, allows the display screen 40 of the monitor part 14 to display a safety stopper image M1 indicating the safety stopper position As.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to ophthalmic devices. [Background technology]

[0002] Conventionally, in an ophthalmic apparatus having a measurement unit in which a first measurement section and a second measurement section are arranged at different heights with respect to the test eye, an ophthalmic apparatus is known which is equipped with a height position memory means which stores height position information of the measurement unit when the test eye is measured using the first measurement section, and a drive control means which drives and controls the measurement unit based on the height position information stored in the height position memory means to adjust the height when measuring the second eye characteristic after measurement of the first eye characteristic by the first measurement section is completed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-289663 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional technology, in a multi-type ophthalmic device equipped with a function for measuring (examining) a plurality of eye characteristics, in order to efficiently perform alignment for measuring a plurality of eye characteristics, a measuring unit is driven and controlled based on stored height position information to adjust the height. For this reason, for example, in a multi-type ophthalmic device, when an intraocular pressure measurement is performed after an eye refractive power measurement, image information of a safety stopper position that allows the intraocular pressure measurement head to approach the subject's eye in the front-rear direction during intraocular pressure measurement cannot be obtained. Therefore, there is a problem that the examiner cannot grasp how much distance is secured between the subject's eye and the intraocular pressure measurement head in the front-rear direction (Z-axis direction) during intraocular pressure measurement.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide an ophthalmic device that can obtain image information of a safety stopper position that allows the first measurement head to approach the test eye in the forward / backward direction when measuring intraocular pressure with the first measurement head. [Means for solving the problem]

[0006] In order to achieve the above object, the ophthalmologic apparatus of the present disclosure includes a first measurement head for measuring the intraocular pressure of the subject's eye, a second measurement head for measuring eye characteristics other than the intraocular pressure of the subject's eye and for adjusting the alignment position in three axial directions with respect to the subject's eye during measurement, a monitor unit for displaying images on a display screen, and a control unit for controlling each unit of the apparatus. The control unit outputs result information of the front-rear alignment position of the second measurement head with respect to the subject's eye, When the above is obtained, before starting intraocular pressure measurement with the first measurement head, A safety stopper position at which the first measurement head is permitted to approach the subject's eye in the front-rear direction is calculated. When the safety stopper position is calculated, During the period from the preparation stage of intraocular pressure measurement by the first measurement head to the end of intraocular pressure measurement, The display of a safety stopper image showing the position of the safety stopper is permitted on the display screen of the monitor unit. Effect of the Invention

[0007] In this way, the alignment information of the second measurement head is reflected in the calculation of the safety stopper position of the first measurement head, and the calculated safety stopper position is reflected in the display on the display screen. As a result, when measuring intraocular pressure with the first measurement head, image information of the safety stopper position at which the first measurement head is allowed to approach the subject's eye in the front-rear direction can be obtained. In addition, from the preparation stage for intraocular pressure measurement by the first measurement head until the end of the intraocular pressure measurement, it becomes possible to obtain image information of the safety stopper position of the first measurement head with respect to the subject's eye in response to a request from the examiner. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an external appearance of an ophthalmologic apparatus according to a first embodiment. [Diagram 2] 1 is a side view showing the appearance of an ophthalmologic apparatus according to a first embodiment. [Diagram 3] 2 is a block diagram showing a control system in the ophthalmologic apparatus according to the first embodiment. FIG. [Figure 4] 4 is a side view showing a state of reflex measurement by an RM measuring head of a composite measuring head in the ophthalmologic apparatus according to the first embodiment. FIG. [Diagram 5] 4 is an explanatory diagram showing the positional relationship among an RM measurement position, a CT switching position, a CT measurement position, and a safety stopper position with respect to a subject's eye in the ophthalmologic apparatus according to the first embodiment. FIG. [Figure 6] 5 is a flowchart showing an example of an operation from when the ophthalmologic apparatus according to the first embodiment is turned on until one measurement is completed. [Figure 7] FIG. 13 is a diagram showing an example of a display image (anterior eye image) before switching to a safety stopper screen during CT measurement in the ophthalmologic apparatus according to the first embodiment. [Figure 8] FIG. 13 is a diagram showing an example of a display image (a superimposed image in which a safety stopper image is superimposed on an anterior eye image) after switching to a screen having a safety stopper image during CT measurement in the ophthalmologic apparatus according to Example 1. [Figure 9] FIG. 13 is a diagram showing an example of a display image (regional division image of an anterior eye image and a safety stopper image) of an internal camera image and a safety stopper image during CT measurement displayed on the display screen of a monitor unit during CT measurement in an ophthalmologic apparatus according to Example 2. [Figure 10] 13 is a diagram showing a first modified example of a safety stopper image displayed on the display screen of the monitor unit during CT measurement in the ophthalmologic apparatus according to the second embodiment. FIG. [Figure 11] 13 is a diagram showing a second modified example of a safety stopper image displayed on the display screen of the monitor unit during CT measurement in the ophthalmologic apparatus according to the second embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an ophthalmic apparatus according to an embodiment of the present disclosure will be described with reference to a first embodiment and a second embodiment shown in the drawings. EXAMPLES

[0010] Example 1 is applied to an ophthalmic device 1 (called an "autorefract tonometer") that has two measurement heads and combines an autorefractometer, a non-contact tonometer, and a corneal thickness measurement into one unit, thereby enabling the acquisition of three test results in a single measurement.

[0011] 1 are taken as X-axis, Y-axis, and Z-axis as shown in each figure, and the description in the specification is based on the left-right direction (X-axis positive direction is rightward, negative direction is leftward), front-rear direction (Z-axis positive direction is rearward, negative direction is forward), and up-down direction (Y-axis positive direction is upward, Y-axis negative direction is downward, also called height direction) in Fig. 1. Also, the subject P side (Z-axis negative direction) is defined as the front of the ophthalmic device 1, the side facing the subject P (Z-axis positive direction) as the back of the ophthalmic device 1, the right side of the subject P (X-axis positive direction) as the right side of the ophthalmic device 1, and the left side of the subject P (X-axis negative direction) as the left side of the ophthalmic device 1.

[0012] First, the overall configuration of an ophthalmic apparatus 1 according to a first embodiment will be described with reference to FIGS.

[0013] 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 which can be raised and lowered, and a liftable chair 50 on which a subject P sits and which can be raised and lowered. The ophthalmic apparatus 1 further includes a wide-angle camera 60 that captures an image of the subject P (a facial image including both the left and right eyes), and a main control section 17 (control section) that controls the operations of the ophthalmic apparatus main body 2 and the optical table 30. The ophthalmic apparatus 1 also includes an operation section 19 that enables the examiner to input data to the ophthalmic apparatus 1 and to give operating instructions.

[0014] The main body 10 includes a base 11 and a composite measurement head 12 as a measurement section, and is covered with a cover member 13. A monitor 14 as a display section and an operation section is provided on the top of the composite measurement head 12, as shown in Fig. 1 and Fig. 2. In addition, a speaker (sound generating section) for the examiner to give instructions to the subject P during remote operation, a microphone for transmitting responses of the subject P to the examiner, etc. may be provided on the main body 10 or separately from the main body 10.

[0015] The base 11 of the main body 10, the composite measurement head 12, and the monitor 14 are electrically connected. The main body 10, the face support 20, and the optical table 30 are also electrically connected. This enables communication of data and operation instructions between the base 11, the composite 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 configuration may be adopted in which a power supply unit provided in the base 11 supplies power to the composite 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 may be provided separately from the ophthalmologic device main body 2.

[0016] As shown in FIG. 2, the composite measurement head 12 is a composite measurement head having a CT measurement head 12a (first measurement head) that performs intraocular pressure measurement and corneal thickness measurement for each of the left and right eyes of the subject P, and an RM measurement head 12b (second measurement head) that is positioned below the CT measurement head 12a and performs reflex measurement for each of the left and right eyes of the subject P.

[0017] Here, "refractive index measurement" refers to measuring the spherical refractive power, cylindrical refractive power, and astigmatism axis angle of the subject's eye E. "Intraocular pressure measurement" refers to measuring the intraocular pressure of the subject's eye E by blowing air during measurement. "Corneal thickness measurement" refers to measuring the corneal thickness when measuring the intraocular pressure of the subject's eye E, since the measured intraocular pressure is affected by the corneal thickness. The ophthalmic device 1 is equipped with a function for calculating an intraocular pressure correction value that takes into account the effect of corneal thickness on intraocular pressure.

[0018] As shown in FIG. 4, the CT measuring head 12a is provided with a first measuring optical system 15a having an image sensor 151, together with a known measuring optical system for observation and photography and a control circuit for controlling the measuring optical system. As shown in FIG. 4, the RM measuring head 12b is provided with a second measuring optical system 15b having an image sensor 152, together with a known measuring optical system for observation and photography and a control circuit for controlling the measuring optical system. The first measuring optical system 15a and the image sensor 151 are arranged on the first inspection optical axis L1 and correspond to the internal camera of the CT measuring head 12a. The second measuring optical system 15b and the image sensor 152 are arranged on the second inspection optical axis L2 and correspond to the internal camera of the RM measuring head 12b. That is, the measuring optical system 15 is composed of the first measuring optical system 15a and the second measuring optical system 15b. 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 composite measuring head 12.

[0019] As shown in Fig. 2, the base unit 11 is provided with a known XYZ drive mechanism and drive circuit 16 as a movement mechanism for driving the composite measuring head 12 in the X, Y and Z directions. The XYZ drive mechanism and drive circuit 16 uses, for example, a stepping motor as a drive actuator. The XYZ drive mechanism and drive circuit 16 is also provided with a measurement head position sensor (not shown) for detecting the current position of the composite measuring head 12 in the X-axis direction, the current position in the Y-axis direction and the current position in the Z-axis direction. The measurement head position sensor acquires information on the Z-axis alignment position A1 (see Fig. 4) of the RM measuring head 12b after alignment adjustment in RM measurement.

[0020] The composite measuring head 12 is driven by an XYZ drive mechanism / drive circuit 16 in a horizontal direction, i.e., front-rear, left-right directions (X-axis direction and Z-axis direction), and in a vertical direction perpendicular thereto, i.e., up-down direction (Y-axis direction), relative to the base unit 11. As a result, the composite measuring head 12 is supported so as to be movable relative to the base unit 11 in three-dimensional directions (horizontal and vertical directions). The composite measuring head 12 can be driven by operating a touch panel type display screen 40 of the monitor unit 14, in addition to automatic control. That is, the display screen 40 functions as an operation unit 19.

[0021] The monitor unit 14 is made of a color liquid crystal display and has a touch panel type display screen 40 on which an image of the eye to be examined and an operation touch section are displayed. The monitor unit 14 is covered by a cover member 14a. A display control circuit unit and the like are built into the cover member 14a. The monitor unit 14 is supported on one edge of the top of the composite measurement head 12 and is attached so as to be rotatable around a horizontal axis (around the X-axis or Z-axis) and a vertical axis (around the Y-axis). With this configuration, the display screen 40 of the monitor unit 14 can be arranged at a desired angle or direction depending on the examiner's position, posture, eye level, etc. For example, the display screen 40 can be directed toward the back of the main body unit 10 as shown in FIG. 2, or the display screen 40 can be directed toward the front of the main body unit 10 as shown in FIG. 1. The monitor unit 14 can also be arranged on the right or left side of the main body unit 10, and the display screen 40 can be directed to the right or left side.

[0022] In terms of hardware, the control circuit unit is configured to include a microprocessor, RAM, ROM, EEPROM, flash memory, etc. The control circuit unit has a main control unit 17, internal memory 17a, and storage unit 18 shown in Fig. 3. The main control unit 17 is mainly composed of a microprocessor, the internal memory 17a is composed of RAM, etc., and the storage unit 18 is composed of ROM, EEPROM, flash memory, etc.

[0023] 3, the main control unit 17 is connected to the measurement optical system 15, the XYZ drive mechanism / 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 a program stored in the memory unit 18 or the internal memory 17a onto, for example, a RAM, and centrally controls each unit of the ophthalmologic apparatus 1 in response to an appropriate operation input signal from the operation unit 19.

[0024] As described above, the touch panel of the monitor unit 14 is included in the operation unit 19, which accepts operation inputs to the operation touch unit and keyboard displayed on the display screen 40, and sends this operation input signal to the main controller 17. The operation unit 19 also includes a power button of the main body 10, a power button 34 and a lift lever 35 of the optical table 30 described below, and the like, which accepts operation inputs to these and sends this operation input signal to the main controller 17 and the table controller 33. If the ophthalmic apparatus 1 is provided with a control lever or operation touch unit that can be operated by the examiner or subject, or a controller for the examiner or subject, these are also included in the operation unit 19, which accepts operation inputs to these and sends this operation input signal to the main controller 17.

[0025] The face support unit 20 is provided and 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 a configuration in which it is connected to the main body unit 10, and may be configured such that the face support unit 20 is separate from the main body unit 10 and installed on the optical table 30.

[0026] The face support part 20 is mainly composed of 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. In addition, the face support part 20 may be provided so as to be movable in the front-rear direction and the left-right direction by the drive mechanism 25 in order to enable adjustment of the position in the front-rear direction and the left-right direction.

[0027] The subject P faces the ophthalmologic apparatus main body 2 while seated, for example, on a lift chair 50 placed in front of (in front of) the ophthalmologic apparatus main body 2, places his / her chin on the chin rest 22, and places his / her forehead against the forehead rest 24, and undergoes measurement of his / her eye characteristics. Note that in the case of a short subject P, such as a child, the subject P may not be seated on the lift chair 50, but may stand and place his / her face against the face support part 20 for measurement. In the case of a subject P in a wheelchair, the subject P may place his / her face against the face support part 20 while in the wheelchair for measurement.

[0028] The chin rest 22 is a member on which the chin of the subject P is placed, and whether or not the chin of the subject P is placed thereon is detected by a detection sensor 26. In this embodiment, the chin rest 22 is provided to be vertically movable relative to the base 21, so that the chin rest 22 is vertically movable relative to the main body 10. However, in another different embodiment, the entire face support part 20 may be configured to be vertically movable relative to the main body 10.

[0029] The driving mechanism 25 is composed of a known driving mechanism, such as a driving mechanism including a stepping motor, a driving mechanism including a DC motor and a potentiometer, etc. The driving mechanism 25 is driven under the control of the main control unit 17 to move the chin rest 22 in a predetermined upward or downward moving direction by a predetermined amount of movement (movement distance) at a predetermined moving speed. This amount of movement, etc. can be detected by the number of steps of the stepping motor, the value of the potentiometer, etc., and the movement of the chin rest 22 can be easily and highly accurately controlled based on these values.

[0030] The forehead support 24 is a member against which the forehead of the subject P is butted. In this embodiment, the forehead support 24 is fixed to a pair of support columns 23, but in another embodiment, the forehead support 24 may be freely adjusted in its position in the front-rear direction. This adjustment may also be performed by an appropriate drive mechanism, allowing for automated adjustment or operation from an operation unit. Furthermore, it may be configured to be manually performed.

[0031] Furthermore, the face support part 20 may have any configuration as long as it can stably support the face of the subject P so that the face (head) of the subject P does not move unexpectedly during measurement of the ocular characteristics 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. Note that 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.

[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 movement distance and movement direction of the chin rest 22 based on a face image including both the left and right eyes captured by the wide-angle camera 60, and controls the driving mechanism 25 according to this movement information to move the chin rest 22 up and down.

[0033] In this 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 22 in response to an instruction signal from the main control unit 17.

[0034] The optical table 30 is configured to include 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 this embodiment, the ophthalmic device 1 performs measurement while the subject P is sitting on the lifting 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, the lifting chair 50 is not necessary, and the optical table 30 is set to a height corresponding to measurement in a standing position.

[0035] The lifting mechanism 32 raises and lowers the tabletop 31 under the control of the table control unit 33. This allows the height of the tabletop 31 to be adjusted according to the height and chin position of the subject P. In this manner, the tabletop 31 is actually raised and lowered by the lifting mechanism 32.

[0036] 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.

[0037] 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.

[0038] The caster base 36 supports the entire optical table 30. The caster base 36 is provided with casters 36a with a locking mechanism. Therefore, an examiner or the like can easily move the ophthalmic apparatus 1 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.

[0039] 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.

[0040] 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.

[0041] The lift 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 this embodiment, the lift 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 to this. For example, the seat 51 may be configured to move in the vertical direction or the like according to the operation of the operation touch unit displayed on the display screen 40. Also, it may be configured to control the movement of the chin rest unit 22, the optical table 30, and the lift chair 50 so that they are appropriately positioned under the control of the main control unit 17.

[0042] The wide-angle camera 60 is configured with a cylindrical housing, a wide-angle lens, and an imaging element, and is a single camera that captures a facial image including both the left and right eyes of the subject P supported by the face support part 20 from one position during measurement by the composite measurement head 12, as shown in FIG. 4, on the imaging element. The wide-angle camera 60 is located at a position on the front side of the head facing the face support part 20 of the measurement head 12, and is arranged at a position where the imaging optical axis L3 of the wide-angle camera 60 coincides with the first inspection optical axis L1 of the CT measurement head 12a and the second inspection optical axis L2 of the RM measurement head 12b in the left-right direction (X-axis direction). The wide-angle camera 60 is arranged at a height position between the height position of the first inspection optical axis of the CT measurement head 12a and the height position of the second inspection optical axis L2 of the RM measurement head 12b in the height direction (Y-axis direction) (see FIG. 4). The wide-angle camera 60 includes an ultra-wide-angle camera equipped with an ultra-wide-angle lens and a fisheye camera equipped with a fisheye lens.

[0043] Next, a configuration of a main part of the ophthalmologic apparatus 1 according to the first embodiment will be described with reference to FIGS.

[0044] The CT measurement head 12a corresponds to a first measurement head that measures the intraocular pressure of the subject's eye E of the subject P. The RM measurement head 12b is a head for measuring ocular characteristics other than the intraocular pressure of the subject's eye E, and corresponds to a second measurement head that adjusts the alignment position in three axial directions (X, Y and Z axial directions) with respect to the subject's eye E during measurement. When measuring ocular characteristics using the two measurement heads 12a and 12b, the RM measurement head 12b first performs reflex measurement, and then the CT measurement head 12a performs intraocular pressure measurement.

[0045] The main control unit 17 calculates the safety stopper position As in the front-rear direction of the CT measuring head 12a relative to the subject's eye E based on the result information of the Z-axis alignment position A1, which is the front-rear direction alignment position of the RM measuring head 12b relative to the subject's eye E. Then, when the safety stopper position As is calculated, the main control unit 17 allows the display of a safety stopper image M1 representing the safety stopper position As on the display screen 40 of the monitor unit 14. Here, allowing the display of the safety stopper image M1 means that when the safety stopper position As is calculated, the display of the safety stopper image M1 can be switched to in response to a system request or an operation request after the calculation timing. For example, when the safety stopper position As is calculated, the safety stopper image M1 may be displayed immediately at the calculation timing, or the safety stopper image M1 may not be displayed immediately, but may be displayed after waiting for a predetermined display request operation.

[0046] Calculation of the safety stopper position As will be described with reference to Fig. 4 and Fig. 5. The safety stopper position As is calculated by adding the Z-axis alignment position A1 of the RM measuring head 12b with respect to the subject's eye E, the nozzle distance N accompanying switching from the RM measuring head 12b to the CT measuring head 12a, and a predetermined safety stopper setting distance α (As = A1 + N + α).

[0047] Here, the Z-axis alignment position A1 at the RM measurement position is the front-rear direction position of the RM measurement head 12b after alignment adjustment, and the front-rear direction position (Z-axis position) of the subject's eye E, which varies among individuals, is taken into consideration. For this reason, if it is assumed that the Z-axis position of the subject's eye E in the RM measurement does not change in the CT measurement, the Z-axis alignment position A1 can be replaced with the Z-axis direction origin position A2 at the CT measurement position that is away from the RM measurement position by the switching distance C in the Y-axis direction, as shown in FIG. 5. Therefore, adding a known nozzle distance N to the Z-axis alignment position A1 results in the nozzle tip position A3. The nozzle tip position A3 is the Z-axis current position Az of the CT measurement head 12a. And adding a safety stopper setting distance α based on a predetermined constant to the nozzle tip position A3 (= Z-axis current position Az) results in the safety stopper position As. In Figure 5, "RM WD" is the working distance in RM measurement, and "CT WD" is the working distance in CT measurement, which is shorter than the working distance in RM measurement. Also, the safety stopper setting distance α is set to a distance shorter than the working distance in CT measurement.

[0048] When the main controller 17 acquires the result information of the Z-axis alignment position A1 of the RM measuring head 12b, it calculates the safety stopper position As before starting intraocular pressure measurement by the CT measuring head 12a. Then, when the safety stopper position As is calculated, it permits the display of the safety stopper image M1 on the display screen 40 from the preparation stage by the alignment adjustment in intraocular pressure measurement by the CT measuring head 12a until the intraocular pressure measurement is completed.

[0049] In the first embodiment, a predetermined touch operation is performed on the display screen 40 of the monitor unit 14 while the display of the safety stopper image M1 is permitted. The touch operation switches the screen display from the camera image of the subject P (see FIG. 7) to the screen display having the safety stopper image M1 (see FIG. 8). Note that, when a touch operation is performed on the cancel button B13 on the display screen 40, the screen display is returned from the screen display having the safety stopper image M1 (see FIG. 8) to the screen display having the camera image of the subject P (see FIG. 7).

[0050] Here, the "predetermined touch operation" refers to, for example, the operation of pressing a safety stopper button displayed on the display screen 40. The "screen display based on a camera image of the subject P" refers to, for example, an anterior eye image Gf captured by the imaging element 151 of the CT measuring head 12a, as shown in Fig. 7. The "screen display having a safety stopper image M1" refers to, for example, a superimposed image in which the safety stopper image M1 is superimposed on the anterior eye image Gf, as shown in Fig. 8.

[0051] The safety stopper image M1 is an image that represents the positional relationship in the Z-axis direction between the position of the subject's eye E, the safety stopper position As determined by the safety stopper icons 73L and 73R, and the current Z-axis position Az of the CT measuring head 12a determined by the Z-axis position icon 72L. Here, information on the "current Z-axis position Az of the CT measuring head 12a" is acquired at any time during measurement of the eye characteristics by position detection by the measuring head position sensor provided in the XYZ driving mechanism / driving circuit 16, and is reflected in the safety stopper image M1.

[0052] As shown in FIG. 8, the safety stopper image M1 of the first embodiment is an image in which a Z-axis position icon 72L and safety stopper icons 73L, 73R are displayed on a Z-axis operating range scale 71L, 71R. The Z-axis operating range scale 71L, 71R indicates a range in which the CT measuring head 12a can operate in the Z-axis direction relative to the average position of the subject's eye E (the position of "0 mm" on the Z-axis operating range scale 71L, 71R) in the Z-axis coordinate system. The Z-axis position icon 72L indicates the Z-axis current position Az (= nozzle tip position A3) of the CT measuring head 12a in the Z-axis coordinate system. The safety stopper icons 73L, 73R indicate the safety stopper position As in the Z-axis coordinate system. In the CT measurement, the safety stopper image M1 is displayed in the left area of ​​the display screen 40 of the monitor unit 14 when the measurement target is the left eye, and is displayed in the right area of ​​the display screen 40 of the monitor unit 14 when the measurement target is the right eye. Furthermore, the monitor unit 14 has first distance display sections 74L, 74R and second distance display sections 75L, 75R at the upper left and right positions of the Z-axis operating area scale 71 on the display screen 40. The first distance display sections 74L, 74R display the distance from the subject's eye E to the Z-axis current position Az in numbers (in mm) together with the Z-axis position icons 72L, 72R. The second distance display sections 75L, 75R display the distance from the subject's eye E to the safety stopper position As in numbers (in mm) together with the safety stopper icons 73L, 73R.

[0053] Next, an example of the operation from when the ophthalmic apparatus 1 according to the first embodiment is turned on until one measurement is completed will be described with reference to Fig. 6. The operation of the flowchart shown in Fig. 6 starts when the ophthalmic apparatus 1 is turned on. In the following, it is assumed that an examiner stands beside the subject P and assists the subject P while operating the display screen 40 of the monitor unit 14 to give operation instructions to the ophthalmic apparatus 1.

[0054] In step S1, when measuring the characteristics of the subject's eye E, the examiner turns on the power to the ophthalmic apparatus 1 (the ophthalmic apparatus main body 2 and the optical table 30), and the XYZ drive mechanism / drive circuit 16 moves the composite measurement head 12 to its initial position.

[0055] In step S2, following the movement of the composite measuring head 12 to the initial position in step S1, it is determined 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 of the face support part 20. While the subject P has not placed his / her face on the chin rest 22, the determination of step S2 is repeated, and when it is determined that the subject P has placed his / her face on the chin rest 22, the process proceeds to step S3.

[0056] In step S3, following the determination in step S2 that the subject P has placed his / her face on the chin rest 22, the composite measurement head 12 is retracted from the initial position by a predetermined movement amount by the XYZ drive mechanism / drive circuit 16. Here, the retraction movement refers to a movement in which the composite measurement head 12 is moved away from the subject's eye E in the Z axis direction from the distance to the subject's eye E at the initial position while keeping the X axis direction at the center position.

[0057] In step S4, following the retraction of the composite measurement head 12 in step S3, a facial image including both the left and right eyes of the subject P captured by the imaging element of the wide-angle camera 60 at the retracted position of the composite measurement head 12 is displayed on the display screen 40 of the monitor unit 14.

[0058] In step S5, following the display of a facial image on the screen in step S4, or the determination in step S8 that rough alignment by wide-angle camera 60 is incomplete (coarse alignment error), the positions of both the left and right eyes of subject P are touched on the screen of display screen 40.

[0059] In step S6, following the touching of the positions of the left and right eyes in step S5, the XY positions of the subject's eye E relative to the composite measurement head 12 are recognized with respect to a predetermined position where the eyes are captured on the display screen 40 and the standard Z-axis direction position of the subject's eye E. In other words, the amount of positional deviation in the X-axis and Y-axis directions of the composite measurement head 12 with respect to the positions of the left and right eyes of the subject P touched on the screen is recognized.

[0060] In step S7, following the recognition of the XY positions of the subject's eye E in step S6, the height of the face support part 20 in the Y axis direction is automatically adjusted by the drive mechanism 25 so that the position of the subject's eye E in the Y axis direction falls within the range of precision alignment. Here, the adjustment amount in the Y axis direction is the amount of positional deviation in the Y axis direction recognized in step S6.

[0061] In step S8, following the adjustment of the Y position of the subject's eye E in step S7, it is determined whether or not the coarse alignment using the display image from the wide-angle camera 60 has been completed without error. If the coarse alignment has been completed without error, the process immediately proceeds to step S9. However, if an error occurs in the coarse alignment, the process returns to step S5, and both the left and right eyes of the subject P are touched on the display screen 40 again to repeat the coarse alignment operation.

[0062] In step S9, following the determination of completion of the rough alignment in step S8 or the determination of incomplete XY direction alignment in step S10, the XYZ drive mechanism / drive circuit 16 adjusts the XY direction alignment for one of the eyes specified to be examined.

[0063] Here, the XY-direction alignment adjustment refers to an adjustment so that when an image captured by the internal camera of the composite measuring head 12 is displayed on the display screen 40 of the monitor unit 14, an anterior eye image Gf of one of the designated eyes to be examined is within the screen of the display screen 40. Note that, in the adjustment of the XY-direction alignment, the X-position recognition information of the subject's eye E obtained in step S6 is used. Furthermore, when the fine alignment is started following the completion of the rough alignment, the image displayed on the display screen 40 of the monitor unit 14 is switched from the face image including both the left and right eyes captured by the wide-angle camera 60 to the anterior eye image Gf captured by the internal camera built in the composite measuring head 12 (see FIG. 7).

[0064] In step S10, following the adjustment of the XY direction alignment in step S9, it is determined whether the XY direction alignment adjustment is completed. If the XY direction alignment adjustment is not completed, the flow of proceeding from step S9 to step S10 is repeated, and if the XY direction alignment adjustment is completed, the flow proceeds to step S11.

[0065] In step S11, following a determination in S10 that the XY direction alignment adjustment is complete, or a determination in step S12 that the precision alignment is incomplete, automatic adjustment control of the precision alignment is performed by tapping near the pupil on the display screen 40 on which the anterior segment image Gf of the subject's eye E is displayed.

[0066] Here, in the automatic adjustment control of the precision alignment, as shown in Fig. 7, when the vicinity of the pupil of the anterior eye image Gf displayed on the display screen 40 of the monitor unit 14 is tapped, the distance between the detection position of the corneal bright spot image P1 and the center position of the screen is calculated, and the XYZ driving mechanism and driving circuit 16 is driven and controlled based on the calculated distance value. In the driving control, the composite measuring head 12 is driven in the up, down, left and right directions (Y-axis direction and X-axis direction) based on the calculated distance value, and the measuring head 12 is driven in the front and back direction (Z-axis direction) so that the corneal bright spot image P1 is focused. Then, when the corneal bright spot image P1 enters within the target area mark 40e representing the screen center area and the output value of the corneal bright spot image P1 exceeds a predetermined value, the alignment completion condition is satisfied and the precision alignment is completed (see Fig. 9).

[0067] In step S12, following the automatic adjustment of the precision alignment in step S11, it is determined whether the precision alignment is complete. If the precision alignment is not complete, the flow from step S11 to step S12 is repeated, and if the precision alignment is complete, the flow proceeds to step S13.

[0068] In step S13, following the determination of completion of the precision alignment in step S12, the main controller 17 controls the measurement optical system 15 to automatically perform measurement to obtain test information for the specified eye.

[0069] In step S14, following the measurement of the specified eye in step S13, the test results are stored in the memory unit 18, and the process proceeds to END. When the measurement of the specified eye is completed, the test results are stored in the memory unit 18 and are displayed on the display screen 40 so that the examiner can visually recognize the test information.

[0070] Next, we will explain the flow of operations when performing fully automatic measurements of the left and right eyes of a single subject P, in which a series of RM measurements and CT measurements using the CT measurement head 12a and RM measurement head 12b are completed by the examiner's touch operations alone.

[0071] 6, the process proceeds from S1 to S2 to S3 to S4 to S5 to S6 to S7 to S8, and if YES is determined in step S8, the rough alignment using the wide-angle camera 60 is completed. The rough alignment operation using the wide-angle camera 60 is performed in the initial stage of RM measurement in the fully automatic measurement of the left and right eyes, and in the initial stage of transition from RM measurement to CT measurement.

[0072] 6, when the rough alignment for the RM measurement is completed, the process proceeds to S9, the right eye of the subject P is designated as the specified eye, and the XY direction alignment for the RM measurement is started. Then, when the process proceeds from S9 to S10 → S11 → S12 → S13, the precise alignment is performed by tapping near the pupil, and the RM measurement of the right eye of the subject P is performed by the RM measurement head 12b.

[0073] When the RM measurement of the right eye of the subject P is completed by storing the test information in the memory unit 18, the measurement head remains the RM measurement head 12b, and the eye designated by the subject P is changed from the right eye to the left eye. At this time, when an operation to select the left eye is performed, the RM measurement head 12b automatically moves in the X-axis direction so that the position of the second test optical axis L2 coincides with the position of the left eye. Then, the process proceeds from S9 to S10 → S11 → S12 → S13, and after XY direction alignment and precise alignment performed by tapping near the pupil, the RM measurement of the left eye of the subject P is performed by the RM measurement head 12b.

[0074] When the RM measurement of the left eye of the subject P is completed by storing the examination information in the storage unit 18, the eye designated by the subject P remains the left eye, and the measurement head is shifted from the RM measurement head 12b to the CT measurement head 12a. At this time, when an operation to select the CT measurement head 12a is performed, the CT measurement head 12a automatically moves in the Y-axis direction so that the position of the first examination optical axis L1 coincides with the position of the left eye, and performs rough alignment of the CT measurement. Then, when the rough alignment of the CT measurement is completed, the process proceeds from S9 to S10 → S11 → S12 → S13, and the CT measurement of the left eye of the subject P is performed after passing through the XY direction alignment and the fine alignment performed by tapping the vicinity of the pupil.

[0075] When the CT measurement of the left eye of the subject P is completed by storing the examination information in the memory unit 18, the measurement head remains the CT measurement head 12a, and the eye designated by the subject P is changed from the left eye to the right eye. At this time, when an operation to select the right eye is performed, the CT measurement head 12a automatically moves in the X-axis direction so that the position of the first examination optical axis L1 coincides with the position of the right eye. Then, the process proceeds from S9 to S10 → S11 → S12 → S13, and the CT measurement of the right eye of the subject P is performed after XY direction alignment and precise alignment performed by tapping the vicinity of the pupil. The series of operations described above completes the fully automatic measurement of the left and right eyes.

[0076] As described above, when performing fully automatic measurement of the left and right eyes, the RM measurement and CT measurement of the left and right eyes are performed without the subject P moving between the devices, for example, by following the measurement operation sequence: (RM measurement of the right eye of subject P) → (RM measurement of the left eye of subject P) → (CT measurement of the left eye of subject P) → (CT measurement of the right eye of subject P).

[0077] Next, the display function of the safety stopper image M1 on the display screen 40 of the monitor unit 14 will be described with reference to FIGS.

[0078] In the fully automatic measurement of the left and right eyes, when shifting from RM measurement of the left eye of the subject P to CT measurement of the left eye of the subject P, the main controller 17 acquires result information of the Z-axis alignment position A1, which is the front-rear alignment position of the RM measuring head 12b with respect to the subject's eye E. Then, when the result information of the Z-axis alignment position A1 is acquired, the safety stopper position As in the front-rear direction of the CT measuring head 12a with respect to the subject's eye E is calculated by adding the nozzle distance N and the safety stopper setting distance α to the acquired Z-axis alignment position A1 (As=A1+N+α).

[0079] When the safety stopper position As is calculated, the main controller 17 permits the display of a safety stopper image M1 on the display screen 40 from the preparation stage of alignment adjustment for intraocular pressure measurement by the CT measuring head 12a until the intraocular pressure measurement is completed. Then, when a safety stopper button is pressed on the display screen 40 of the monitor unit 14 while the display of the safety stopper image M1 is permitted, the screen display is switched from the screen display of the anterior eye image Gf captured by the internal camera of the subject P (FIG. 7) to the screen display of a superimposed image in which the safety stopper image M1 is superimposed on the anterior eye image Gf (FIG. 8).

[0080] Here, the display image of the anterior eye image Gf before switching is, as shown in Figure 7, an anterior eye image Gf having a corneal bright spot image P1 at an appropriate position in the display area 40a of the display screen 40, and a target area mark 40e and a minimum pupil diameter judgment mark 40f are displayed at the center position of the display area 40a of the test eye, etc.

[0081] 7, operation button display areas 40b and 40c are arranged on both the left and right sides of the subject's eye display area 40a, and an operation button display area 40d is arranged on the bottom side. In the operation button display area 40b, an ID button B1 for inputting the ID of the subject P, an R button B2 for selecting the right eye, a chin rest up and down movement button B3 for moving the chin rest part 22 up and down, a reset button B4, and a measurement mode button B5 for switching the measurement mode are arranged. In the operation button display area 40c, a setup button B6 for displaying a setup screen, an L button B7 for selecting the left eye, a measurement head forward and backward button B8 for moving the composite measurement head 12 forward and backward (Z-axis direction), a start button B9 for starting manual measurement, and a manual / auto switching button B10 are arranged. In the operation button display area 40d, various function buttons B11 such as a cataract button used when measuring the subject's eye for cataracts, a measurement result printout button, and a measurement value clear button are arranged.

[0082] As shown in Figure 8, the superimposed image in which the safety stopper image M1 is superimposed on the anterior eye image Gf after the switching is displayed in the test eye etc. display area 40a of the display screen 40, in the same manner as in Figure 7, with the safety stopper image M1 superimposed on this display.

[0083] As shown in Fig. 8, the safety stopper image M1 is an image in which Z-axis position icons 72L, 72R and safety stopper icons 73L, 73R are displayed on Z-axis operating area scales 71L, 71R. In CT measurement, when the measurement target is the left eye, it is displayed on the left side of the display area 40a of the subject's eye, etc. on the display screen 40, and when the measurement target is the right eye, it is displayed on the right side of the display area 40a of the subject's eye, etc. on the display screen 40 (Fig. 8 shows the case where the measurement target is the left eye). Furthermore, in the first distance notation areas 74L, 74R at the upper left and right positions of the Z-axis operating area scale 71 on the display screen 40 of the monitor unit 14, the distance from the subject's eye E to the Z-axis current position Az is displayed in numbers (in mm) together with the Z-axis position icons 72L, 72R. In the second distance indication portions 75L and 75R, the distance from the subject's eye E to the safety stopper position As is indicated in numbers (in mm) together with the safety stopper icons 73L and 73R.

[0084] In FIG. 8, the operation button display area 40b can be switched from the button arrangement shown in FIG. 7 to a button arrangement for selecting only the R button B2 and the chin rest up-down movement button B3. The operation button display area 40c can be switched from the button arrangement shown in FIG. 7 to a button arrangement for selecting only the L button B7 and the measurement head front-back button B8. The operation button display area 40d can be switched from the arrangement of the various function buttons B11 shown in FIG. 7 to a button arrangement for displaying the OK button B12, the cancel button B13, and the apply button B14. Here, by switching to the button arrangement shown in FIG. 8, it becomes possible to manually change the display positions of the safety stopper icons 73L and 73R. In the manual operation, when the button is operated to the position to which the setting of the front-back button B8 is to be changed, only the triangular icons of the safety stopper icons 73L and 73R move in the direction of the arrows marked on the buttons while leaving the lock icon. After confirming that the triangular icon has been moved to the position where you want to change the setting, press the Apply button B14 or the OK button B12, and the remaining lock icon will move until it overlaps with the triangular icon. Thus, the display positions of the safety stopper icons 73L and 73R are changed by manual operation.

[0085] In this way, when the examiner performs a predetermined operation on the display screen 40 of the monitor unit 14 while the display of the safety stopper image M1 is permitted, the screen display is switched from the screen display of the anterior eye image Gf shown in Fig. 7 to the screen display having the safety stopper image M1 shown in Fig. 8. Therefore, when the CT measuring head 12a is used to measure intraocular pressure after the measurement by the RM measuring head 12b, image information of the safety stopper position As, which is the approach limit position at which the CT measuring head 12a is allowed to approach the subject's eye E during intraocular pressure measurement, is obtained. Therefore, the examiner can visually check the display screen 40 of the monitor unit 14 whether the position of the CT measuring head 12a is a safe distance that does not interfere with intraocular pressure measurement as the working distance in the Z-axis direction between the subject's eye E and the CT measuring head 12a during intraocular pressure measurement.

[0086] 8, the position of "0 mm" on the Z-axis operating range scales 71L, 71R indicates the position of the subject's eye E. The safety stopper icons 73L, 73R indicate the safety stopper position As. The Z-axis position icon 72L indicates the current Z-axis position Az of the CT measuring head 12a. That is, an image is generated that indicates the positional relationship in the Z-axis direction between the position of the subject's eye E, the safety stopper position As, and the current Z-axis position Az.

[0087] In general, the working distance in intraocular pressure measurement is shorter than the working distance in eye refraction measurement or corneal shape measurement. For example, the working distance in intraocular pressure measurement is set to about 11 mm, whereas the working distance in eye refraction measurement or the like is set to about 35 mm. Thus, in intraocular pressure measurement, in which the working distance is particularly short, there is a high possibility that the nozzle for ejecting air provided in the intraocular pressure measurement head will come into contact with the subject's eye E.

[0088] On the other hand, when the examiner visually checks the display screen 40 of the monitor unit 14, the examiner can easily recognize the Z-axis positional relationship between the position of the subject's eye E, the safety stopper position As, and the Z-axis current position Az from the safety stopper image M1. In this way, the display screen 40 provides useful display information showing the Z-axis positional relationship, making it possible to perform intraocular pressure measurement by remote examination, tablet examination, or the like, which is performed in a situation where the examiner is not present near the subject P.

[0089] Next, a description will be given of the characteristic function of the ophthalmologic apparatus 1 according to the embodiment 1. In the embodiment 1, the main control unit 17 calculates a safety stopper position As at which the CT measuring head 12a is permitted to approach the subject's eye E in the front-rear direction based on the result information of the Z-axis alignment position A1 of the RM measuring head 12b with respect to the subject's eye E. When the safety stopper position As is calculated, the display of a safety stopper image M1 representing the safety stopper position As is permitted on the display screen 40 of the monitor unit 14.

[0090] That is, the alignment information of the RM measuring head 12b is reflected in the calculation of the safety stopper position As of the CT measuring head 12a, and the calculated safety stopper position As is reflected in the display on the display screen 40. As a result, when intraocular pressure is measured by the CT measuring head 12a, image information of the safety stopper position As at which the approach of the CT measuring head 12a in the front-rear direction to the subject's eye E is permitted is obtained.

[0091] In particular, by visually checking the display screen 40, the examiner can obtain information on the safety stopper position As of the CT measuring head 12a from the display screen 40. Therefore, the intraocular pressure measurement can be performed not only when the examiner is present near the subject P, but also by remote examination, tablet examination, or the like performed when the examiner is not present near the subject P. For example, if the monitor unit 14 and the main control unit 17 are communicatively connected to each other through a communication network consisting of short-distance wireless communication or through a communication network such as the Internet, the examination can be performed from a remote location such as a separate room, a reception desk, or even a management center, even if the examiner is not present near the subject P.

[0092] In the first embodiment, the main control unit 17 adds the nozzle distance N associated with switching from the RM measuring head 12b to the CT measuring head 12a and a predetermined safety stopper setting distance α to the Z-axis alignment position A1 of the RM measuring head 12b with respect to the test eye E to calculate the safety stopper position As.

[0093] That is, when the Z-axis alignment position A1 of the RM measuring head 12b with respect to the subject's eye E is determined, the safety stopper position As is calculated using the known nozzle distance N and the constant safety stopper setting distance α. The information on the Z-axis alignment position A1 of the RM measuring head 12b with respect to the subject's eye E is alignment position information that takes into consideration the fact that there is an individual difference in the Z-axis position of the subject's eye E when the subject P is supported on the face support part 20. That is, the information on the Z-axis alignment position A1 is a value that takes into consideration whether the subject's eye E is at the average position, whether the subject's eye E is further back than the average position, or whether the subject's eye E is out of the average position. Therefore, the safety stopper position As can be calculated with high accuracy just by acquiring the information on the Z-axis alignment position A1 of the RM measuring head 12b with respect to the subject's eye E.

[0094] In the first embodiment, when the main controller 17 acquires result information of the Z-axis alignment position A1 of the RM measuring head 12b, it calculates the safety stopper position As before starting intraocular pressure measurement by the CT measuring head 12a. When the safety stopper position As is calculated, the display of the safety stopper image M1 on the display screen 40 is permitted from the preparation stage of intraocular pressure measurement by the CT measuring head 12a until the intraocular pressure measurement is completed.

[0095] That is, the examiner requests to know the information of the safety stopper position As not only during intraocular pressure measurement by the CT measuring head 12a but also from the preparation stage such as alignment adjustment before starting intraocular pressure measurement by the CT measuring head 12a. In response to this, for example, when shifting from the RM measuring head 12b to intraocular pressure measurement by the CT measuring head 12a, it is possible to obtain the result information of the Z-axis alignment position A1 of the RM measuring head 12b before shifting to intraocular pressure measurement. Therefore, when the safety stopper position As is calculated in the preparation stage of intraocular pressure measurement by the CT measuring head 12a, the display of the safety stopper image M1 on the display screen 40 is permitted from the preparation stage of intraocular pressure measurement by the CT measuring head 12a until the intraocular pressure measurement is completed. Therefore, it is possible to obtain image information of the safety stopper position As of the CT measuring head 12a with respect to the subject's eye E in response to the examiner's request from the preparation stage of intraocular pressure measurement by the CT measuring head 12a until the intraocular pressure measurement is completed.

[0096] In Example 1, when a predetermined touch operation is performed on the display screen 40 while the display of the safety stopper image M1 is permitted in the main control unit 17, the screen display is switched from the camera image of the subject P to a screen display having the safety stopper image M1.

[0097] For example, when the examiner is beside the subject P, the examiner can actually visually confirm the positional relationship between the position of the subject's eye E and the nozzle tip position of the CT measurement head 12a. On the other hand, in a remote examination or tablet examination where the examiner is not beside the subject P, the examiner cannot actually visually confirm the positional relationship between the position of the subject's eye E and the nozzle tip position of the CT measurement head 12a. In this way, when intraocular pressure measurement is performed, the display request for image information of the safety stopper position As of the CT measurement head 12a relative to the subject's eye E differs depending on the positional relationship between the examiner and the subject P. For this reason, when the display of the safety stopper image M1 is permitted, if a touch operation is performed on the display screen 40, image information of the safety stopper position As of the CT measurement head 12a relative to the subject's eye E is acquired in response to the display request of the examiner.

[0098] In the first embodiment, the safety stopper image M1 is an image representing the positional relationship in the Z axis direction among the position of the subject's eye E, the safety stopper position As, and the current Z axis position Az which is the current position of the CT measuring head 12a in the front-rear direction.

[0099] That is, during intraocular pressure measurement, the current Z-axis position Az of the CT measuring head 12a may fluctuate within the range of the working distance. At this time, by visually checking the safety stopper image M1, it is possible to recognize a position change, such as whether the current Z-axis position Az is approaching the position of the subject's eye E or whether the current Z-axis position Az is moving away from the position of the subject's eye E. Similarly, it is possible to recognize a position change, such as whether the current Z-axis position Az is approaching the safety stopper position As or whether the current Z-axis position Az is moving away from the safety stopper position As, and further whether the current Z-axis position Az is passing the safety stopper position As and approaching the position of the subject's eye E.

[0100] In Example 1, the safety stopper image M1 is an image that displays Z-axis operating area scales 71L, 71R indicating the range in which the CT measuring head 12a can operate in the Z-axis direction relative to the test eye E, Z-axis position icons 72L, 72R indicating the current Z-axis position Az of the CT measuring head 12a, and safety stopper icons 73L, 73R indicating the safety stopper position As.

[0101] That is, the safety stopper image M1 is displayed as an icon in which the Z-axis position icons 72L, 72R and the safety stopper icons 73L, 73R are arranged along the Z-axis operating area scales 71L, 71R. During intraocular pressure measurement, the Z-axis current position Az of the CT measuring head 12a may fluctuate within the range of the working distance. At this time, on the display screen 40, when the Z-axis position icons 72L, 72R move toward 0 (zero) of the Z-axis operating area scales 71L, 71R, it indicates that the CT measuring head 12a is approaching the subject's eye E, and when the Z-axis position icons 72L, 72R move in the opposite direction, it indicates that the CT measuring head 12a is moving away from the subject's eye E. In addition, when the Z-axis position icons 72L, 72R move, a change in positional relationship is indicated with respect to the safety stopper icons 73L, 73R that are fixedly displayed at positions along the Z-axis operating area scales 71L, 71R.

[0102] As described above, the ophthalmologic apparatus 1 according to the first embodiment provides the following effects.

[0103] (1) The apparatus includes a first measurement head (CT measurement head 12a) for measuring the intraocular pressure of the subject's eye E, a second measurement head (RM measurement head 12b) for measuring eye characteristics other than the intraocular pressure of the subject's eye E and adjusting the alignment position in three axial directions with respect to the subject's eye E during measurement, a monitor unit 14 for displaying an image on a display screen 40, and a control unit (main control unit 17) for controlling each unit of the apparatus. The control unit (main control unit 17) calculates a safety stopper position As at which the approach of the first measurement head (CT measurement head 12a) in the front-rear direction is permitted with respect to the subject's eye E based on result information of the front-rear direction alignment position (Z-axis alignment position A1) of the second measurement head (RM measurement head 12b) with respect to the subject's eye E, and when the safety stopper position As is calculated, allows the display of a safety stopper image M1 representing the safety stopper position As on the display screen 40 of the monitor unit 14. Therefore, when intraocular pressure is measured by the first measuring head (CT measuring head 12a), it is possible to obtain image information of the safety stopper position As at which the first measuring head (CT measuring head 12a) is permitted to approach the subject's eye E in the front-rear direction. In particular, intraocular pressure measurement is not limited to a situation where an examiner is present near the subject P, but can also be performed by remote examination, tablet examination, or the like, which is performed in a situation where an examiner is not present near the subject P.

[0104] (2) The control unit (main control unit 17) calculates the safety stopper position As by adding the nozzle distance N associated with switching from the second measurement head (RM measurement head 12b) to the first measurement head (CT measurement head 12a) and a predetermined safety stopper setting distance α to the front-rear alignment position (Z-axis alignment position A1) of the second measurement head (RM measurement head 12b) with respect to the subject's eye E. Therefore, the safety stopper position As can be calculated with high accuracy simply by acquiring information on the front-rear alignment position (Z-axis alignment position A1) of the second measurement head (RM measurement head 12b) with respect to the subject's eye E.

[0105] (3) When the control unit (main control unit 17) acquires the result information of the front-rear alignment position (Z-axis alignment position A1) of the second measurement head (RM measurement head 12b), it calculates the safety stopper position As before starting intraocular pressure measurement by the first measurement head (CT measurement head 12a). When the safety stopper position As is calculated, the display of the safety stopper image M1 on the display screen 40 is permitted from the preparation stage of intraocular pressure measurement by the first measurement head (CT measurement head 12a) until the intraocular pressure measurement is completed. Therefore, it becomes possible to acquire image information of the safety stopper position As of the first measurement head (CT measurement head 12a) with respect to the subject's eye E in response to a request from the examiner from the preparation stage of intraocular pressure measurement by the first measurement head (CT measurement head 12a) until the intraocular pressure measurement is completed.

[0106] (4) When a predetermined touch operation is performed on the display screen 40 while the display of the safety stopper image M1 is permitted, the control unit (main control unit 17) switches the screen display from the camera image (anterior eye image Gf) of the subject P to a screen display including the safety stopper image M1. Therefore, when the display of the safety stopper image M1 is permitted, when a touch operation is performed on the display screen 40, image information of the safety stopper position As can be obtained in response to the display request of the examiner.

[0107] (5) The safety stopper image M1 is an image that represents the positional relationship in the Z-axis direction between the position of the subject's eye E, the safety stopper position As, and the current Z-axis position Az, which is the current position in the front-rear direction of the first measurement head (CT measurement head 12a). Therefore, during intraocular pressure measurement, the positional relationship between the position of the subject's eye E and the current Z-axis position Az of the first measurement head (CT measurement head 12a), which may change, and the change in the positional relationship can be easily recognized by simply visually checking the safety stopper image M1.

[0108] (6) The safety stopper image M1 is an image in which Z-axis position icons 72L, 72R indicating the current Z-axis position Az of the first measurement head (CT measurement head 12a) and safety stopper icons 73L, 73R indicating the safety stopper position As are displayed on Z-axis operating range scales 71L, 71R indicating the range in which the first measurement head (CT measurement head 12a) can operate in the Z-axis direction with respect to the subject's eye E. Therefore, when the safety stopper image M1 is visually observed during intraocular pressure measurement, the positional relationship and the change in the positional relationship between the Z-axis operating range scales 71L, 71R, the Z-axis position icons 72L, 72R, and the safety stopper icons 73L, 73R can be easily recognized.

[0109] (7) The first measurement head is a CT measurement head 12a that performs intraocular pressure measurement of the subject's eye E, and the second measurement head is an RM measurement head 12b that performs reflex measurement of the subject's eye E. Therefore, multiple test results such as intraocular pressure measurement, corneal thickness measurement, and reflex measurement can be obtained in a short time by one measurement using the ophthalmic apparatus 1, without the subject P having to move between devices, which contributes to reducing the burden on the subject P. EXAMPLES

[0110] Example 2 is an example in which a safety stopper image is different from the safety stopper image M1 of Example 1. A safety stopper image M2 of Example 2 will be described with reference to FIG.

[0111] 9, the safety stopper image M2 of the second embodiment is displayed on a safety stopper image display section 41 set in a partial area of ​​the display screen 40 of the monitor section 14. That is, the anterior eye image Gf obtained by intraocular pressure measurement is displayed on the area of ​​the display screen 40 excluding the safety stopper image display section 41, and the screen display having the safety stopper image M2 is a screen display using an area division image of the anterior eye image Gf and the safety stopper image M2.

[0112] As a display method of the safety stopper image M2, as in the first embodiment, when a predetermined touch operation is performed on the display screen 40, the screen display may be switched from the anterior eye image Gf of the subject P to the screen display of the area division image having the safety stopper image M2 (see FIG. 9). When the display of the safety stopper image M1 is permitted, the screen display may be automatically switched to the screen display of the area division image having the safety stopper image M1 (see FIG. 9), and the screen display of the area division image may be maintained while the display is permitted. The safety stopper image display section 41 may be a rectangular area surrounded by a frame in the lower right part of the display screen 40 as shown in FIG. 9, or may be set in the upper right part, lower left part, upper left part, etc. of the display screen 40.

[0113] 9, the safety stopper image M2 is an image that illustrates an examined eye icon 81, a Z-axis origin position 82, a nozzle tip position 83, and a safety stopper line 84. The examined eye icon 81 indicates the current position of the examined eye E. The Z-axis origin position 82 indicates the position of the CT measuring head 12a in the Z-axis coordinate system, which is obtained by replacing the Z-axis alignment position A1 (=Z-axis origin position A2 at the CT measuring position) of the RM measuring head 12b with the Z-axis. The nozzle tip position 83 (=nozzle tip position A3) is connected to the Z-axis origin position 82 by a Z-axis straight line in the Z-axis coordinate system, and indicates the Z-axis current position Az of the CT measuring head 12a. The safety stopper line 84 is displayed as a line perpendicular to the Z-axis between the examined eye icon 81 and the nozzle tip position 83 in the Z-axis coordinate system, and indicates the safety stopper position As. As shown in FIG. 9, the safety stopper image M2 also includes an illustrated CT working distance range 85.

[0114] That is, the safety stopper image M2 is an illustrated display of the explanatory diagram (FIG. 5) for setting the safety stopper position As in the Z-axis direction during intraocular pressure measurement. During intraocular pressure measurement, the current Z-axis position Az of the CT measuring head 12a may fluctuate within the CT working distance range 85. At this time, when the nozzle tip position 83 moves toward the subject's eye icon 81, it indicates that the CT measuring head 12a is approaching the subject's eye E, and when the nozzle tip position 83 moves in the opposite direction, it indicates that the CT measuring head 12a is moving away from the subject's eye E. Furthermore, when the nozzle tip position 83 moves, a change in the positional relationship is indicated with respect to the safety stopper line 84 that is fixedly displayed at a position between the subject's eye icon 81 and the nozzle tip position 83.

[0115] In the main controller 17 of the second embodiment, when the subject's eye icon 81 is displayed, the subject's eye icon 81 is not displayed or is provisionally displayed in an average position until the anterior-posterior position of the subject's eye E is determined after the display is started. Then, when the anterior-posterior position of the subject's eye E is determined during CT measurement alignment, the subject's eye icon 81 is displayed at the determined anterior-posterior position of the subject's eye E, or the provisional display is rewritten to the actual display (see FIG. 9).

[0116] Here, the anterior-posterior position of the subject's eye E is detected by adding a contact sensor in addition to the detection sensor 26 to the face support unit 20, or by adding a lateral camera in addition to the wide-angle camera 60 to the composite measurement head 12. Based on the detection of the anterior-posterior position of the subject's eye E, the anterior-posterior position of the subject's eye E is determined. Moreover, provisional display of the subject's eye icon 81 at an average position refers to displaying the subject's eye icon 81 with a dashed line or in a light color, etc.

[0117] That is, when the safety stopper position As is calculated and the display of the safety stopper image M2 on the display screen 40 is started, if the subject P moves his / her face from the position of his / her face during the RM measurement, the position of the subject's eye E may be shifted when the CT measurement is started. Therefore, when the actual position of the subject's eye E is not known, for example, if the subject's eye icon 81 of the safety stopper image M2 is displayed in an average position, the examiner may erroneously recognize the positional relationship between the subject's eye icon 81, the nozzle tip position 83, and the safety stopper line 84, or the change in the positional relationship. In response to this, while the anterior-posterior position of the subject's eye E is not known, the subject's eye icon 81 is removed or temporarily displayed in an average position, and when the anterior-posterior position of the subject's eye E is known, the subject's eye icon 81 is displayed or rewritten to the actual display. Therefore, when the intraocular pressure is measured, the subject's eye E of the safety stopper image M2 is displayed in the correct anterior-posterior position that has been determined. Other configurations and other functions are similar to those of the first embodiment, and therefore illustrations and explanations thereof will be omitted.

[0118] As described above, in the second embodiment, in addition to the effects (1), (2), (3), (4), (5), and (7) described above, the effects listed below can be obtained.

[0119] (8) The safety stopper image M2 is an image that illustrates an examined eye icon 81 indicating the current position of the examined eye E, a Z-axis origin position 82 indicating the position obtained by replacing the Z-axis alignment position A1 of the second measurement head (RM measurement head 12b) with the first measurement head (CT measurement head 12a), a nozzle tip position 83 of the first measurement head (CT measurement head 12a), and a safety stopper line 84 indicating the safety stopper position As. Therefore, when the safety stopper image M2 is visually observed during intraocular pressure measurement, the positional relationship and the change in the positional relationship between the examined eye icon 81, the nozzle tip position 83, and the safety stopper line 84 can be easily recognized by the easy-to-understand illustrated display in the Z-axis direction.

[0120] (9) When displaying the subject eye icon 81, the control unit (main control unit 17) removes the display of the subject eye icon 81 or displays it provisionally in an average position until the anterior-posterior position of the subject eye E is determined after the display starts. When the anterior-posterior position of the subject eye E is determined, the control unit 17 displays the subject eye icon 81 at the determined anterior-posterior position of the subject eye E, or rewrites the provisional display to an actual display. This prevents the examiner from misrecognizing the positional relationship or change in positional relationship between the nozzle tip position A3 and the safety stopper position As of the CT measuring head 12a relative to the position of the subject eye E during intraocular pressure measurement. [Variation 1]

[0121] Modification 1 is an example in which the safety stopper image is different from the safety stopper image M2 of Example 2. A safety stopper image M3 of modification 1 will be described with reference to FIG.

[0122] The safety stopper image M3 of the first modification is an image in which an examined eye icon 91, a CT measuring head icon (first measuring head icon) 92, a Z-axis operating range scale 93, and a safety stopper line 94 are illustrated. The examined eye icon 91 indicates the current position of the examined eye E in the Z-axis coordinate system. The CT measuring head icon 92 indicates the tip shape of the CT measuring head 12a in the illustrated form in the Z-axis coordinate system. The Z-axis operating range scale 93 indicates the range in which the CT measuring head 12a can operate in the Z-axis direction in the Z-axis coordinate system. The safety stopper line 94 is displayed as a line perpendicular to the Z-axis between the examined eye icon 91 and the CT measuring head icon 92 in the Z-axis coordinate system, and indicates the safety stopper position As. In addition, a CT working distance range 95 is also illustrated in the safety stopper image M3 as shown in FIG. 10.

[0123] That is, the safety stopper image M3 illustrates, using pictorial icons, the measurement situation when the position of the subject's eye E of the subject P is viewed from the side during CT measurement. During intraocular pressure measurement, the current Z-axis position Az of the CT measurement head 12a may fluctuate within the CT working distance range 95. At this time, when the CT measurement head icon 92 moves toward the subject's eye icon 91, it indicates that the CT measurement head 12a is approaching the subject's eye E, and when the CT measurement head icon 92 moves in the opposite direction, it indicates that the CT measurement head 12a is moving away from the subject's eye E. In addition, when the CT measurement head icon 92 moves, a change in positional relationship with respect to a safety stopper line 94 that is fixedly displayed at a position between the subject's eye icon 91 and the CT measurement head icon 92 is indicated.

[0124] As described above, in addition to the advantages (1), (2), (3), (4), (5), (7), and (9) above, the first modification provides the following advantages.

[0125] (10) The safety stopper image M3 is an image that illustrates an eye icon 91 indicating the current position of the eye E, a first measurement head icon (CT measurement head icon 92) indicating the tip shape of the first measurement head (CT measurement head 12a), a Z-axis operating range scale 93 indicating the range in which the first measurement head (CT measurement head 12a) can operate in the Z-axis direction, and a safety stopper line 94 indicating the safety stopper position As. Therefore, when the safety stopper image M3 is visually observed during intraocular pressure measurement, the positional relationship and the change in the positional relationship between the eye icon 91, the first measurement head icon (CT measurement head icon 92), and the safety stopper line 94 can be easily recognized by the illustrated display using the illustrated icons. [Variation 2]

[0126] This is an example in which the safety stopper image is a three-dimensional illustrative display image of the two-dimensional illustrative display safety stopper image M3 of Modification 1. A safety stopper image M4 of Modification 2 will be described with reference to FIG.

[0127] The safety stopper image M4 of the second modification is an image in which a three-dimensional subject's eye icon 96, a three-dimensional CT measuring head icon 97, and a safety stopper surface 98 are displayed in a three-dimensional illustration. Furthermore, a safety stopper image M3', which is a perspective view of the two-dimensional illustration of the safety stopper image M3 of the first modification, is added to the side of the safety stopper image M4 in the three-dimensional illustration. The three-dimensional subject's eye icon 96 is arranged inside a square box, showing the left and right subject's eyes E, and the box surface in front of the three-dimensional subject's eye icon 96 is the safety stopper surface 98.

[0128] That is, the safety stopper image M4 is a 3D illustration display using pictorial icons of the measurement situation when the position of the subject's eye E of the subject P is viewed from an oblique side during CT measurement. Therefore, during intraocular pressure measurement, in addition to the action of Modification Example 1, during remote examination, tablet examination, etc., the position of the three-dimensional subject's eye icon 96, the movement of the three-dimensional CT measurement head icon 97, and the position of the safety stopper surface 98 can be grasped from images that are close to the actual observation images during intraocular pressure measurement performed by an examiner standing beside the subject P.

[0129] As described above, in addition to the advantages (1), (2), (3), (4), (5), (7), and (9) above, the second modification provides the following advantages.

[0130] (11) The safety stopper image M4 is an image in which a three-dimensional subject's eye icon 96 indicating the current position of the subject's eye E, a three-dimensional CT measuring head icon 97 (three-dimensional first measuring head icon) indicating the tip shape of the first measuring head (CT measuring head 12a), and a safety stopper surface 98 indicating the safety stopper position As are displayed in three-dimensional illustrations. Therefore, when the safety stopper image M4 is viewed during intraocular pressure measurement, the positional relationship and the change in the positional relationship between the three-dimensional subject's eye icon 96, the three-dimensional first measuring head icon (three-dimensional CT measuring head icon 97), and the safety stopper surface 98 can be easily recognized by the 3D illustration display using the three-dimensional icons.

[0131] Although the embodiments of the present disclosure have been described above in detail with reference to the drawings, Example 1 and Example 2 are merely examples of the present disclosure, and the present disclosure is not limited to only the configurations of Example 1 and Example 2. Any design changes that do not depart from the gist of the present disclosure are of course included in the present disclosure.

[0132] In the first embodiment, an example of the composite measurement head 12 using the CT measurement head 12a as the first measurement head and the RM measurement head 12b as the second measurement head is shown. However, the second measurement head of the composite measurement head is not limited to the RM measurement head. For example, it may be various measurement heads such as a KR measurement head, a corneal shape measurement head, a fundus photography head, an axial length measurement head, an endothelial cell measurement head, etc., which are heads for measuring eye characteristics other than the intraocular pressure of the subject eye and perform alignment position adjustment in three axial directions with respect to the subject eye during measurement.

[0133] In the first embodiment, when a predetermined touch operation is performed on the display screen 40 while the display of the safety stopper image M1 is permitted, an example is shown in which the screen display based on the anterior eye image Gf of the subject P is switched to a superimposed image display in which the safety stopper image M1 is superimposed. In the second embodiment, when the display of the safety stopper image M2 is permitted, an example is shown in which the screen display based on the anterior eye image Gf of the subject P is switched to a region divided image display in which the safety stopper image M2 is displayed on the safety stopper image display unit 41. However, when the display of the safety stopper image is permitted, or when a predetermined touch operation is performed while the display is permitted, an example in which the screen display based on the anterior eye image of the subject is switched to a full screen display of the safety stopper image may also be used.

[0134] In the first embodiment, an example of the safety stopper image M1 is shown, and in the second embodiment, examples of the safety stopper images M2, M3, and M4 are shown. However, the safety stopper image is not limited to the examples of the safety stopper images M1, M2, M3, and M4. In other words, as long as it is an image that represents the Z-axis positional relationship between the position of the subject eye, the safety stopper position, and the current Z-axis position, which is the current position of the first measurement head in the front-rear direction, various safety stopper images with improved visibility are also included.

[0135] In the first embodiment, the display screen 40 of the monitor unit 14 attached to the ophthalmic device main body 2 is used as the operation unit 19. However, the monitor unit may be detachable as the operation unit, and the examiner may hold and operate the monitor unit. In addition, a controller such as a tablet terminal, an information terminal such as a smartphone, or a dedicated terminal having a display unit and an operation unit such as a touch panel or a keyboard may be provided separately from the monitor unit. The display unit of this controller may display a screen (including an image of the examinee) similar to the screen displayed on the display screen of the monitor unit. In this case, the examiner can hold the monitor unit or the controller and operate it while visually checking the condition of the examinee from a desired location away from the ophthalmic device main body. [Explanation of symbols]

[0136] 1 Ophthalmology equipment 12 Composite Measuring Head 12a CT measuring head (first measuring head) 12b RM measuring head (second measuring head) 14 Monitor section 20 Face support 40 display screen 60 Wide-angle camera 16 XYZ drive mechanism and drive circuit 17 Main control unit (control unit) P Subject E. Examined eye A1 Z-axis alignment position (front-rear alignment position) As Safety stopper position Az Current Z-axis position of the CT measuring head N Nozzle Distance α Safety stopper setting distance Gf Anterior eye image (camera image of subject P) M1 Example 1 safety stopper image 71L, 71R Z-axis operating range scale 72L, 72R Z-axis position icon 73L, 73R Safety stopper icon M2 Example 2 safety stopper image 81 Examination eye icon 82 Z-axis origin position 83 Nozzle tip position 84 Safety Stopper Line M3 Safety stopper image of Example 2 (Modification 1) 91 Examination Eye Icon 92 CT measurement head icon (first measurement head icon) 93 Z-axis operating range scale 94 Safety Stopper Line M4 Safety stopper image of Example 2 (Modification 2) 96 3D Patient Icon 97 3D CT measurement head icon (3D first measurement head icon) 98 Safety stopper surface

Claims

1. a first measuring head for measuring an intraocular pressure of a subject's eye; a second measurement head which is a head for measuring eye characteristics other than the intraocular pressure of the subject's eye and adjusts an alignment position in three axial directions with respect to the subject's eye during measurement; A monitor unit that displays an image on a display screen; A control unit that controls each unit of the device, when the control unit acquires result information on the front-rear direction alignment position of the second measurement head with respect to the subject's eye, the control unit calculates a safety stopper position at which the front-rear direction approach of the first measurement head with respect to the subject's eye is permitted before starting intraocular pressure measurement by the first measurement head, When the safety stopper position is calculated, display of a safety stopper image representing the safety stopper position is permitted on the display screen of the monitor unit from a preparation stage of intraocular pressure measurement by the first measurement head until the intraocular pressure measurement is completed. An ophthalmic apparatus comprising:

2. 2. The ophthalmic apparatus according to claim 1, The control unit adds a nozzle distance associated with switching from the second measurement head to the first measurement head and a predetermined safety stopper setting distance to the front-rear direction alignment position of the second measurement head with respect to the subject's eye, and calculates the safety stopper position. An ophthalmic apparatus comprising:

3. An ophthalmic device according to claim 1 or claim 2, When a predetermined touch operation is performed on the display screen while display of the safety stopper image is permitted, the control unit switches the screen display from a camera image of the subject to a screen display including the safety stopper image. An ophthalmic apparatus comprising:

4. The ophthalmologic apparatus according to any one of claims 1 to 3, The safety stopper image is an image representing a Z-axis positional relationship between the position of the subject eye, the position of the safety stopper, and a current Z-axis position which is a current position of the first measuring head in the front-rear direction. An ophthalmic apparatus comprising:

5. The ophthalmic device according to claim 4, The safety stopper image is an image in which a Z-axis operating range scale indicating a range in which the first measuring head can operate in the Z-axis direction with respect to the subject's eye, a Z-axis position icon indicating the current Z-axis position of the first measuring head, and a safety stopper icon indicating the safety stopper position are displayed. An ophthalmic apparatus comprising:

6. The ophthalmic device according to claim 4, The safety stopper image is an image illustrating an icon of the subject's eye indicating the current position of the subject's eye, a nozzle tip position of the first measuring head, and a safety stopper line indicating the position of the safety stopper. An ophthalmic apparatus comprising:

7. The ophthalmic device according to claim 4, The safety stopper image is an image illustrating an icon of the subject's eye indicating the current position of the subject's eye, a first measuring head icon indicating the tip shape of the first measuring head, a Z-axis operating range scale indicating the range in which the first measuring head can operate in the Z-axis direction, and a safety stopper line indicating the position of the safety stopper. An ophthalmic apparatus comprising:

8. The ophthalmic device according to claim 4, The safety stopper image is an image in which a three-dimensional subject's eye icon indicating the current position of the subject's eye, a three-dimensional first measurement head icon indicating the tip shape of the first measurement head, and a safety stopper surface indicating the safety stopper position are displayed as three-dimensional illustrations. An ophthalmic apparatus comprising:

9. An ophthalmic device according to claim 6 or claim 7, When displaying the subject's eye icon, the control unit removes the subject's eye icon from the display or temporarily displays the subject's eye icon in an average position until the front-rear position of the subject's eye is determined after the display is started, When the position of the subject's eye in the anterior-posterior direction is determined, the subject's eye icon is displayed at the determined position of the subject's eye in the anterior-posterior direction, or the provisional display is rewritten to a real display. An ophthalmic apparatus comprising:

10. The ophthalmic device according to claim 8, When displaying the three-dimensional subject's eye icon, the control unit omits the display of the three-dimensional subject's eye icon or temporarily displays the icon in an average position until the front-rear position of the subject's eye is determined after the display is started, When the position of the subject's eye in the anterior-posterior direction is determined, the three-dimensional icon of the subject's eye is displayed at the determined position of the subject's eye in the anterior-posterior direction, or the provisional display is rewritten to a real display. An ophthalmic apparatus comprising:

11. In the ophthalmic apparatus according to any one of claims 1 to 10, the first measurement head is a CT measurement head that measures intraocular pressure of the subject's eye, The second measurement head is an RM measurement head for performing a reflex measurement of the subject's eye. An ophthalmic apparatus comprising:

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