JP2018038517A - Ophthalmologic apparatus and control method of ophthalmologic apparatus - Google Patents

Abstract

[PROBLEMS] To prevent a measurement head of an ophthalmologic apparatus from coming into contact with an eye to be inspected even when a subject moves the face away from the support part during alignment and returns the face part to the support part again. To do. SOLUTION: A support unit 1 that supports a face HB of a subject, an apparatus main body 4 that includes a measurement head 9 that has a distal end portion disposed close to an eye E of the subject, and the apparatus main body 4 with respect to the support unit 1 A driving device that relatively moves to align the measuring head 9 with the eye E and a drive control unit that controls driving of the driving device are provided. A forehead sensor 82 for detecting the position of the face HB with respect to the support unit 1 is provided, and the drive control unit stops the alignment operation by the driving device based on the position of the face HB detected by the forehead sensor 82. [Selection] Figure 1

Description

  The present invention relates to an ophthalmologic apparatus that supports a face portion of a subject with a support portion and aligns a tip portion of an inspection head close to an eye to be examined.

  As the ophthalmologic apparatus described above, there is a non-contact tonometer (non-contact tonometer). This non-contact tonometer measures the intraocular pressure of the subject's eye by spraying fluid (air) from a measuring head placed close to the subject's eye and optically detecting changes in the shape of the cornea due to the spray. To do. In such a non-contact tonometer, the alignment is strictly performed when the tip of the nozzle that ejects the fluid is brought close to the eye to be examined in measuring the intraocular pressure.

  At the time of examination, the subject is uncomfortable because the fluid is sprayed on the eyes, so the measurement of the other eye after the measurement of one eye is completed, and if there is experience measured in the past, from the measuring head I feel like running away. For this reason, even if the subject fixes the face part to the chin rest of the support part, the face part may be moved away from the forehead rest. If the face is retracted during the alignment operation of the inspection head, the apex of the cornea, which is the alignment reference point, moves away, and the head moves toward the subject following this movement. For this reason, when the subject returns the face portion so as to contact the forehead again, the tip of the measurement unit may come into contact with the eye to be examined that has been previously exposed. In order to prevent such a situation, various techniques have been proposed.

  Patent Document 1 describes a technique that mechanically prevents the gantry from moving forward when a forehead contact is detected and a non-contact state is detected. Patent Document 2 describes an optometry apparatus that notifies the presence or absence of contact with a forehead by blinking a lamp.

JP 63-130040 A JP 2007-61508 A

  However, the device described in Patent Document 1 prevents forward movement by a mechanical stopper when there is no contact signal during manual alignment, and cannot be applied to an apparatus that automatically performs alignment. In addition, the device described in Patent Document 2 uses only the contact detection signal regarding whether or not alignment can be started and whether or not measurement can be started, and there is no mention of what operation is performed during alignment.

  The present invention has been made in view of the above problems, and even when the subject moves the face part away from the support part during alignment and returns the face part to the support part again, the eyeball proximity of the ophthalmologic apparatus It is an object of the present invention to provide an ophthalmologic apparatus capable of preventing the unit from coming into contact with the subject's eye and a method for controlling the ophthalmologic apparatus.

  The invention according to claim 1, which solves the above-described problem, includes a device main body including a support portion that supports a face portion of a subject, an eyeball proximity portion in which a distal end portion is disposed in proximity to the eye of the subject, and the device main body. In the ophthalmologic apparatus comprising: a drive device that moves the eyeball proximity portion relative to the support portion to align the eyeball proximity portion with the eye to be examined; and a drive control device that controls the drive of the drive device. A face position detection device that detects the position of the face portion relative to the face position, and the drive control device stops the alignment operation by the drive device based on the position of the face portion detected by the face position detection device. It is characterized by that.

  Similarly, the invention according to claim 2 is the ophthalmologic apparatus according to claim 1, wherein the face position detection device is arranged on the support portion and whether or not the face portion of the subject is in contact. A forehead sensor for detection is provided.

  Similarly, the invention according to claim 3 is the ophthalmologic apparatus according to claim 1, wherein the face position detecting device includes a photographing device that photographs the face, and the face portion is based on an output of the photographing device. The position with respect to the said support part is detected.

  Similarly, the invention according to claim 4 is the ophthalmologic apparatus according to any one of claims 1 to 3, wherein the drive control device is configured such that when the face portion is separated from the support portion, the drive device is provided. Control for stopping the operation of the eyeball, or control for separating the eyeball proximity portion from the eye to be examined by the driving device.

  Similarly, the invention according to claim 5 is the ophthalmologic apparatus according to claim 1, wherein the eyeball proximity part moves most toward the eye to be examined, and the eyeball proximity part is on the side opposite to the eye to be examined. A predetermined reference position is set between the last moving position and the last moving position, and a first area is defined between the most advanced position and the reference position, and a second area is defined between the reference position and the last retracted position. The drive control device performs control to retract the eyeball proximity part in a direction away from the eye to be examined when the tip of the eyeball proximity part is in the first region, and the eyeball proximity part is the second When in the area, control is performed to stop the eyeball proximity portion.

  Similarly, the invention according to claim 6 is the ophthalmologic apparatus according to claim 1, wherein the drive control device performs alignment in the vertical and horizontal directions and the front and rear directions based on alignment signals obtained with respect to the directions of XYZ. A predetermined condition is set for an alignment signal in at least one of the XYZ directions, and a first alignment operation for adjusting the position in the vertical, horizontal, and longitudinal directions without satisfying the condition, and the position adjustment with the condition satisfied When performing the second alignment operation, when the face portion is separated from the support portion, control is performed to stop the eyeball proximity portion in the state in which the first alignment operation is performed, and the second alignment operation is performed. In a state in which the eyeball is being moved, control is performed to retract the eyeball proximity portion in a direction away from the eye to be examined. .

  Similarly, the invention according to claim 7 is the ophthalmologic apparatus according to any one of claims 1 to 6, wherein when the face part of the subject is separated from the support part, the face part is It is characterized by comprising output means for outputting the separation from the support portion.

  Similarly, the invention described in claim 8 includes a support unit that supports the face of the subject, an apparatus main body that includes an eyeball proximity unit in which a distal end portion is disposed in proximity to the subject's eye, and the device main body includes the support unit. In the control method of an ophthalmologic apparatus comprising a drive device that moves relative to the eye and aligns the eyeball proximity portion with the eye to be examined, the position of the face portion relative to the support portion of the subject is detected, and the face When the part is separated from the support part, the driving device is stopped, or the eyeball proximity part is separated from the eye to be examined.

  Similarly, the invention according to claim 9 is the control method for the ophthalmologic apparatus according to claim 8, wherein the most advanced position where the eyeball proximity portion moves most toward the eye to be examined, and the eyeball proximity portion is the eye to be examined. A predetermined reference position is set between the last retracted position moving to the opposite side, the first region from the most advanced position to the reference position, and the first area from the reference position to the last retracted position. Two regions, when the tip of the eyeball proximity portion is in the first region, the eyeball proximity portion is retracted in a direction away from the eye to be examined, and when the eyeball proximity portion is in the second region, The eyeball proximity portion is stopped.

  Similarly, the invention according to claim 10 is the method for controlling an ophthalmic apparatus according to claim 8, wherein the drive control device is aligned in the up / down / left / right / front / rear directions based on alignment signals obtained for the respective directions of XYZ. The first alignment operation for setting a predetermined condition for the alignment signal in at least one of the XYZ directions and adjusting the position in the vertical, horizontal, and longitudinal directions without satisfying the condition, and the position satisfying the condition. And performing the second alignment operation for adjusting, when the face portion is separated from the support portion, in the state of performing the first alignment operation, the eyeball proximity portion is stopped, and the second alignment operation is performed. In a state where the eyeball is being moved, the eyeball proximity portion is retracted in a direction away from the eye to be examined.

  According to the present invention, even when the subject moves the face part away from the support part during alignment and returns the face part to the support part again, the eyeball proximity part of the ophthalmic apparatus contacts the eye to be examined. Can be prevented.

  In other words, according to the ophthalmologic apparatus of the first aspect, the drive unit control device stops the alignment operation by the drive unit based on the position of the face detected by the face position detection device, so that the subject moves the face. Even if it returns to a support part, an eyeball proximity | contact part does not contact an eye to be examined by alignment operation.

  According to the ophthalmologic apparatus of the second aspect, the face position detection device includes the forehead sensor and detects whether or not the face portion is in contact with the support portion. Can be reliably detected.

  According to the ophthalmologic apparatus of the third aspect, the face position detection device includes a photographing device for photographing the face portion, and detects the position of the face portion with respect to the support portion based on the output of the photographing device. The position of the face can be reliably detected without contact.

  According to the ophthalmologic apparatus of the fourth aspect, the drive control device controls the operation of the drive device to stop when the face portion is separated from the support portion, or causes the eyeball proximity portion to be separated from the eye to be examined by the drive device. Since the control is performed, the eyeball proximity part does not move toward the eye to be examined, and even if the subject returns the face part to the support part, the eyeball proximity part does not contact the eye to be examined by the alignment operation.

  Further, according to the ophthalmologic apparatus according to claim 5, when the distal end portion of the eyeball proximity portion is in the first region, the drive control unit performs control to retract the eyeball proximity portion in a direction away from the eye to be examined. When the eyeball proximity part is in the second region, control is performed to stop the eyeball proximity part, so that the eyeball proximity part does not move toward the eye to be examined and the alignment operation is performed even if the subject returns the face part to the support part. This prevents the proximity of the eyeball from contacting the eye to be examined.

  In addition, according to the ophthalmologic apparatus of the sixth aspect, when the face part is separated from the support part, the drive control apparatus stops the eyeball proximity part in the state in which the first alignment operation is performed, and performs the second alignment. In the state of performing the operation, the eyeball proximity part is retracted in a direction away from the eye to be examined, so the eyeball proximity part does not move toward the eye to be examined, and the subject returns the face part to the support part. However, the eyeball proximity portion does not contact the eye to be examined by the alignment operation.

  In addition, according to the ophthalmologic apparatus of the seventh aspect, when the subject's face is separated from the support, the ophthalmologic apparatus is provided with output means for outputting that the face is separated from the support. The measurer can surely recognize that the face part of the subject is separated from the support part.

  According to the control method for an ophthalmologic apparatus according to claim 8, since the alignment operation by the driving device is stopped based on the position of the face detected by the part position detection device, the subject returns the face to the support unit. Even so, the eyeball proximity portion does not contact the eye to be examined by the alignment operation.

  According to the control method for an ophthalmologic apparatus according to claim 9, when the tip of the eyeball proximity portion is in the first region, the control is performed to retract the eyeball proximity portion in a direction away from the eye to be examined. When the eyeball is in the second region, control is performed to stop the eyeball proximity part, so that the eyeball proximity part does not move toward the eye to be examined, and even if the subject returns the face part to the support part, The part does not contact the eye to be examined.

  According to the control method of the ophthalmologic apparatus according to claim 10, when the face portion is separated from the support portion, in the state where the first alignment operation is performed, the eyeball proximity portion is stopped and the second alignment operation is performed. In the state of being performed, the eyeball proximity part is retracted in a direction away from the eye to be examined, so that the eyeball proximity part does not move toward the eye to be examined and even if the subject returns the face part to the support part The eyeball proximity portion does not contact the eye to be examined by the alignment operation.

BRIEF DESCRIPTION OF THE DRAWINGS The external appearance of the ophthalmic apparatus which concerns on embodiment of this invention is shown, (a) is a front view, (b) is a side view which shows a use condition, (c) is a rear view which shows a support part. 1 shows an optical system of the ophthalmologic apparatus, (a) is a schematic diagram showing a measurement optical system, an anterior ocular segment imaging system, an infrared optical system, and a fixation optical system, and (b) is a Z alignment optical system. It is a schematic diagram shown. It is a block diagram which shows the control system of the ophthalmologic apparatus. It is a flowchart which shows the operation | movement procedure of the ophthalmologic apparatus. FIG. 3A shows a state of arrangement of a face part on a support part in the same ophthalmologic apparatus, FIG. 4A is a schematic diagram showing a state where the face part is normally arranged on the support part, and FIG. (C) is a schematic diagram which shows the display screen of a monitor when a face part remove | deviates from a support part. It is a schematic diagram explaining the arrangement position of the airflow spray nozzle in the ophthalmologic apparatus. It is a flowchart which shows operation | movement of the ophthalmologic apparatus which concerns on 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the ophthalmologic apparatus which concerns on 2nd Embodiment of this invention.

  The ophthalmologic apparatus which concerns on the form for implementing this invention is demonstrated. The present invention can be applied to any ophthalmic measurement apparatus, any ophthalmologic imaging apparatus, or any multifunction machine. Examples of the ophthalmologic measurement apparatus include a refractometer, a keratometer, a specular microscope, and a tonometer. Examples of the ophthalmologic photographing apparatus include an OCT apparatus, a fundus camera, and an SLO.

  Hereinafter, a non-contact tonometer (non-contact tonometer) will be described as an ophthalmologic apparatus according to an embodiment. FIG. 1 is an external view of an ophthalmologic apparatus according to an embodiment of the present invention, where (a) is a front view, (b) is a side view showing a use state, and (c) is a rear view showing a support portion. . The non-contact tonometer S includes a device base 2, a gantry 3, and a device body 4. The apparatus base 2 has a support 1 that supports the face HB of the subject. As shown in FIG. 1 (c), a chin rest 1a and a forehead rest 1b are arranged on the support 1, and the chin rest 1a has a height of the eye E according to the size of the face HB. It can be moved up and down to roughly match. In the present embodiment, the forehead sensor 1b has a forehead sensor 82 as an output means for outputting that the face is separated from the support when the face HB is separated from the forehead support 1b of the support. Has been placed.

  The forehead sensor 82 detects whether or not the face HB is in contact, and a microswitch, a piezoelectric element, an electrostatic element, a strain detection element, a temperature detection element, or a reflective sensor can be used. In this example, it is assumed that a microswitch is used.

  The gantry 3 is provided so as to be driven in the front-rear direction and the left-right direction with respect to the apparatus base 2. Note that the front-rear direction (the axis of the eye E to be examined and the direction along the optical axis O1 of the non-contact tonometer S) is indicated by an arrow Z, the left-right direction perpendicular to the optical axis is indicated by an arrow X, and the vertical direction is indicated by an arrow Y.

  The apparatus main body 4 is provided in the upper part of the gantry 3 and can move in the front-rear direction, the left-right direction, and the up-down direction with respect to the gantry 3 by operation of an internal drive mechanism. As a result, the apparatus main body 4 is moved in the XY direction, which is the up / down / left / right direction, to perform XY alignment, and is moved in the Z direction, which is the front / rear direction, to adjust the position of the measuring head 9 including the airflow spray nozzle 8 with respect to the eye E. Z alignment is performed.

  The gantry 3 is provided with an operation knob 5 having operation buttons 5a, a monitor 6 as a display unit, and the like. The operation knob 5 is operated by an examiner, whereby the gantry 3 is moved back and forth and left and right with respect to the apparatus base 2. Further, by rotating the operation knob 5 around the axis of the operation knob 5, the apparatus main body 4 is moved up and down. Note that a structure in which only the apparatus main body 4 is moved by operation of the operation knob 5 may be employed. Moreover, it may be operable with a touch panel or a mouse attached to the monitor 6 instead of the operation knob. Further, an airflow blowing nozzle 8 is provided on the front surface of the apparatus main body 4 through the anterior eye glass 12 (see FIG. 2) so as to face the eye E of the subject. The airflow spray nozzle 8 is arranged with the tip thereof facing the subject from the measuring head 9 which is an eyeball proximity portion protruding from the apparatus main body 4 toward the subject.

  FIG. 2 shows an optical system of the ophthalmologic apparatus, (a) is a schematic diagram showing a measurement optical system, an anterior ocular segment imaging system, an infrared optical system, and a fixation optical system, and (b) is a Z alignment. It is a schematic diagram which shows an optical system. As shown in FIG. 1A, an air chamber 11, a measurement optical system 10, an infrared light projection system 20, an anterior eye imaging system 27, and a fixation optical system 30 are arranged inside the apparatus body 4. ing. In the present embodiment, as shown in FIG. 2B, the apparatus main body 4 includes a Z-direction alignment optical system 40 (alignment illumination system 50, alignment detection system 60) for performing alignment in the Z direction. Is arranged.

  Air is sent from the pneumatic feeder to the air chamber 11, and the air is ejected from the airflow spray nozzle 8 toward the eye E. In the figure, reference numeral 12 denotes an anterior ocular window glass, and reference numerals 13 and 14 denote chamber glass for closing the front and rear sides of the air chamber 11.

  In the air chamber 11, an airflow spray nozzle 8 is arranged, and the optical axes of the measurement optical system 10, the anterior ocular segment imaging system 27, the infrared light projection system 20, and the fixation optical system 30 are in the airflow spray nozzle 8. Be placed. The measurement optical system 10 for measuring intraocular pressure includes a first dichroic mirror 15, an imaging lens 16, a pinhole 18, and an applanation sensor 17. The infrared light projection system 20 includes an infrared light source 21 and a diaphragm 22. Further, the anterior segment imaging system 27 includes an imaging lens 28 and an anterior segment area sensor 29. The anterior segment imaging system 27 images the anterior segment of the eye E through the anterior segment window glass 12 and the chamber glasses 13 and 14. The measurement optical system 10 and the anterior segment imaging system 27 are coupled by a dichroic mirror 26.

  Furthermore, the fixation optical system 30 includes visible light, in this example, a green visible light source 31 and a diaphragm 32. The infrared light projection system 20 and the fixation optical system 30 are coupled by a second dichroic mirror 24. Light beams from the infrared light source 21 and the visible light source 31 are converted into parallel light by the collimator lens 25, guided to the first dichroic mirror 15, and irradiated to the eye E from the air chamber 11 through the airflow spray nozzle 8. As shown in FIG. 2B, the apparatus main body 4 is provided with an anterior segment illumination light source 19 that illuminates the anterior segment of the eye E to be examined. Infrared light is emitted from the anterior segment illumination light source 19. If the wavelength of the infrared light from the anterior segment illumination light source 19 is different from that of the infrared light source 21, the infrared light from the anterior segment illumination light source 19 can be prevented from entering the applanation sensor 17 as noise. it can. Note that the anterior segment illumination light source 19 and the infrared light source 21 may have the same wavelength by turning off the anterior segment illumination light source 19 at the time of measuring intraocular pressure.

  In this embodiment, the eye E is illuminated with infrared light from the anterior segment illumination light source 19, and the anterior segment of the subject E is detected by the anterior segment area sensor 29 that is an image sensor of the anterior segment imaging system 27. Is taken and displayed on the monitor 6. The light beam projected from the infrared light projection system 20 onto the eye cornea is reflected by the cornea and forms a Purkinje image. The Purkinje image is picked up by the anterior segment area sensor 29 together with the anterior segment image, and the measurement unit moves in the XY directions so that the Purkinje image falls within a specified range on the anterior segment area sensor 29. Used as an index for alignment. Further, when measuring the intraocular pressure, the applanation sensor 17 detects the corneal reflection light of the eye E of the light flux from the infrared light projection system 20, and the air is blown from the airflow spray nozzle 8 to the eye E to be examined. The intraocular pressure is measured based on the change in the amount of reflected light based on the amount of change in the corneal shape detected in step 1. Further, the fixation optical system 30 presents a visual target that is a fixed collimation for the eye E to be examined.

  Next, the Z direction alignment optical system 40 will be described. The Z-direction alignment optical system 40 is fixed to the apparatus main body 4 and moves relative to the support unit 1 together with the apparatus main body 4. As shown in FIG. 2B, the Z-direction alignment optical system 40 includes an alignment illumination system 50 and an alignment detection system 60 that are arranged symmetrically with the optical axis O1 in the horizontal direction. The alignment illumination system 50 includes a light source 51, a condenser lens 52, a collimator lens 53, and a diaphragm 54. The alignment detection system 60 includes a line sensor 61 and an imaging lens 62. The Z-direction alignment optical system 40 detects the corneal reflected light of the eye E to be examined by the alignment illumination system 50 by the alignment detection system 60, measures the distance from the corneal apex of the eye E, and the Z direction of the apparatus body 4 Used to perform the alignment.

  Next, the configuration of the control system of the non-contact tonometer S according to this embodiment will be described. FIG. 3 is a block diagram showing a control system of the ophthalmologic apparatus. In the non-contact tonometer S, in addition to the above-described units, the compressed air supply unit 70 to the air chamber 11, the support unit control unit 80, the initial position setting switch 91, the driving device 100 of the apparatus main body 4, the printer unit 110, communication Unit 120 and control unit 130.

  The compressed air supply unit 70 includes a rotary solenoid 71 that drives a piston that pumps the air that is pumped to the air chamber 11, and a pressure sensor 72 that measures the pressure in the air chamber 11. The support controller 80 includes a chin rest motor 81 that moves the chin rest 1a up and down, and a forehead sensor 82 that detects whether the face HB is in contact with the forehead rest 1b.

  The initial position setting switch 91 is used to reset each movable part of the non-contact tonometer S to the initial position when the non-contact tonometer S is started or after measurement of the eye to be examined is completed. The drive device 100 performs alignment by moving the device body 4 relative to the support unit 1 in the XY and Z directions. The monitor 6 is composed of a liquid crystal display device, for example, and displays an image of the anterior segment camera realized by the anterior segment area sensor 29, necessary information, and the like. The operation unit includes various operation means including the operation knob 5 described above. The operation unit may be configured to allow input from a touch panel attached to the monitor 6. The printer unit 110 prints measurement results and the like on a sheet. The communication unit 120 transmits a measurement result to an electronic medical record system or other devices, and receives a subject ID read by a barcode reader.

The control unit 130 includes an arithmetic processing unit 140 and a drive control unit 150 that is a drive control device. The arithmetic processing unit 140 performs image processing and the like. The drive control unit 150 includes a main control unit 151 including a CPU (Central Processing Unit), a RAM (Random, etc.).
The storage unit 152 includes an access memory (ROM), a read only memory (ROM), and the like. The main control unit 151 executes the control method of the ophthalmologic apparatus according to the present invention by the program stored in the storage unit 152 to perform each process described later.

  Next, a procedure for measuring intraocular pressure with the non-contact tonometer S will be described. FIG. 4 is a flowchart showing an operation procedure of the ophthalmologic apparatus. First, in the non-contact tonometer S, the control unit 130 turns on the visible light source 31 of the non-contact tonometer S and presents the fixation target to the eye E. Next, the infrared light source 21 is turned on, infrared light is projected onto the eye E to be examined, and the Purkinje image reflected by the cornea is photographed by the anterior eye area sensor together with the anterior eye image to perform XY alignment. An XY spot is detected (step SA1). Here, the XY spot is a Purkinje image by the cornea. The Purkinje image is a bright spot image obtained by photographing the anterior eye part in which the luminous flux is projected onto the cornea from the front. The Purkinje image obtained when the parallel light is projected is a virtual image observed at a position half the radius r from the apex of the cornea, and an image is acquired by the anterior eye area sensor 29.

  If an XY spot is detected (YES in step SA2), the center of gravity of the XY spot is calculated (step SA9), and alignment in the XY direction is performed (step SA10).

  When the XY spot cannot be detected (NO in step SA2), the drive control unit 150 searches for the pupil from the image acquired by the anterior eye area sensor 29 (step SA3). When the pupil is detected (YES in step SA4), the drive control unit 150 calculates the center position of the pupil (step SA5), and the drive control unit 150 performs XY alignment on the pupil center (step SA6). The apparatus body 4 is moved to the front side in the Z direction (step SA7). As a result, the XY spot can be normally detected.

  If the pupil cannot be detected (NO in step SA4), manual alignment by the examiner is performed (step SA8), and the process returns to the XY spot search (step SA1). The pupil cannot be detected when the position of the apparatus main body 4 is greatly deviated from the eye to be examined and the anterior eye area sensor 29 images the face HB other than the eye E to be examined. The examiner adjusts the height of the eye to be examined by moving the chin rest 1a up and down, and then operating the operation knob 5 while observing the monitor 6 to drive the drive device 100 to move the device body 4 to move the anterior eye. The partial area sensor 29 is aligned so that the pupil of the eye E can be observed.

  In a state where the XY spot is detected (YES in step SA2), the drive control unit 150 calculates the center of gravity of the XY spot (step SA9). Then, the drive control unit 150 drives the drive device 100 based on the earned center of gravity, and performs XY alignment of the airflow spray nozzle 8 with respect to the eye E (step SA10).

  In the state where the XY alignment is completed (YES in step SA11), the airflow spray nozzle 8 is not yet in the proper position in the front-rear direction with respect to the eye E. For this reason, the drive control unit 150 moves the Z-direction alignment optical system 40. Use to perform Z alignment. However, if the Z alignment is greatly deviated, the Z alignment signal cannot be detected (NO in step SA12). In this case, the apparatus main body 4 is advanced while maintaining the XY alignment state. When the Z signal is detected by the alignment detection system 60 (YES in step SA12), alignment in the Z direction is performed based on the Z signal. After the Z alignment is completed (YES in step SA14), an intraocular pressure measurement is performed (step SA15).

  In the present embodiment, the operations in steps SA1 to SA10 and SA16 in the above alignment operation are referred to as a first alignment operation, and the operations in steps SA12 to SA15 after the end of the first alignment operation are referred to as a second alignment operation.

<First Embodiment>
Hereinafter, control of the ophthalmologic apparatus according to the first embodiment will be described. FIG. 5 shows a state of arrangement of the face portion on the support portion in the ophthalmologic apparatus. FIG. 5A is a schematic view showing a state in which the face portion is normally arranged on the support portion, and FIG. FIG. 6C is a schematic diagram showing a display screen of the monitor when the face part is detached from the support part. FIG. 6 is a schematic diagram for explaining the arrangement position of the airflow spray nozzle in the ophthalmologic apparatus, and FIG. 7 is a flowchart showing the operation of the ophthalmologic apparatus according to the first embodiment of the present invention.

  In this embodiment, as shown in FIG. 5 (a), when the face HB is correctly placed on the support 1, the forehead sensor 82, which is a microswitch placed on the forehead pad 1b, detects the forehead. Generates a signal indicating that Thus, when the forehead is in contact with the forehead pad 1b, the non-contact tonometer S performs the alignment operation described above.

  On the other hand, as shown in FIG. 5B, when the non-contact tonometer S is in alignment when the face HB is removed from the support unit 1, the eye E moves to the opposite side of the non-contact tonometer S. Therefore, the apparatus main body 4 moves following the eye E to perform Z alignment. In this state, when the face HB is placed on the support unit 1 again, a situation occurs in which the eye E contacts the measuring head 9. In the present embodiment, the display shown in FIG. 5C is performed on the monitor 6, a warning is given by sound, and the following processing is performed according to the position of the measuring head 9.

  First, the position of the measuring head 9 will be described. FIG. 6 is a schematic diagram for explaining the arrangement position of the measurement head in the ophthalmologic apparatus. In this embodiment, the position where the measurement head 9 can be arranged is divided into a first area and a second area.

  Normally, when the subject puts the face HB on the support unit 1, as shown in FIG. 6, the position of the eye E to be examined has individual differences, but the average position of the eye E to be examined is the standard position D. A range in which most of the subject's eyes enter before and after the standard position D is assumed to be a cornea appearance range. Further, the distance from the distal end portion of the measuring head 9 at the time of measuring intraocular pressure to the eye E is defined as a working distance (WD). In the present embodiment, the position where the measurement head 9 is set forward by WD from the tip of the measurement head 9 is movable about the standard position D by a distance exceeding the cornea appearance range. Thereby, the non-contact tonometer S according to the present embodiment can cope with various subjects having different eyeball positions.

  Here, as shown in FIG. 6, when the position where the measurement head 9 has moved most toward the eye to be examined is the most advanced position F, and the measurement head 9 is the last retracted position B where it has moved to the opposite side of the eye E, A predetermined reference position R is set between the movable regions between the most forward position F and the most backward position B. The reference position R is positioned WD behind the standard position D, and the reference position R is a position farther from the front end of the cornea appearance range (front side). A region from the most advanced position F to the reference position R is defined as a first region, and a region from the reference position R to the last retracted position B is defined as a second region.

  In the present embodiment, when the non-contact tonometer S is being aligned and the face HB is separated from the support unit 1 and the tip of the measurement head 9 is in the first region, the drive control unit 150 is configured to measure the measurement head 9. Is controlled to retreat in the direction away from the eye E, and control is performed to stop the measurement head 9 when the tip of the measurement head 9 is in the second region.

  That is, in the non-contact tonometer S, the drive control unit 150 performs control as shown in FIG. First, the non-contact tonometer S starts alignment (step SB1), drives the measuring head 9 to perform alignment (step SB2), and when there is a forehead contact signal from the forehead sensor 82 (YES in step SB3), The alignment operation shown in FIG. 4 is performed (step SB4), and when the alignment operation is completed (YES in step SB5), intraocular pressure measurement is performed (step SB6).

  If the forehead detection signal disappears during the alignment operation (NO in step SB3), the alignment operation is stopped (step SB7), and it is determined whether the position of the tip of the measuring head 9 is the first region or the second region (step SB8). ). When the position of the tip of the measurement head 9 is close to the first region, that is, the eye E, the measurement head 9 is retracted. On the other hand, when the position of the tip of the measuring head 9 is in the second region, it is stopped (NO in step SB8).

  In the non-contact tonometer S according to the present embodiment, when the face portion HB is separated from the support portion 1, the stop or reverse operation is performed depending on the position of the measurement head 9. Therefore, it is possible to reliably prevent the measurement head 9 from coming into contact with the eye E when the face HB is disposed on the support 1 again.

Second Embodiment
Next, an ophthalmologic apparatus according to a second embodiment of the present invention will be described. FIG. 8 is a flowchart showing the operation of the ophthalmologic apparatus according to the second embodiment of the present invention.

  In the non-contact tonometer S according to the present embodiment, when the face HB is separated from the support part 1, the measuring head 9 depends on which stage the alignment is in, that is, during the first alignment operation or the second alignment operation. Select to stop or reverse. When the alignment is greatly deviated in the XY direction, XY and Z alignment signals cannot be obtained. Even if the alignment of XY matches, the alignment signal of XYZ cannot be obtained in the same manner if the alignment of Z is greatly deviated. Therefore, at the beginning of the alignment, the alignment is started in a state where the XY or Z alignment signal cannot be obtained on the assumption that the measuring head is far away from the eye to be examined, and the alignment signal is obtained when the alignment is achieved to some extent. become. The operation of adjusting the position in the up / down / left / right / front / rear directions in a state where at least one of the signals in the XY direction or the Z direction cannot be obtained is referred to as a first alignment operation, and the alignment signals in both the XY direction and the Z direction are obtained. Control for adjusting the position is defined as a second alignment operation.

  In the present embodiment, during the first alignment, the measurement head 9 is only stopped after being separated from the eye E by a considerable amount, and during the second alignment, the measurement head 9 is disposed close to the eye E. Retreat for.

  As shown in FIG. 8, when the non-contact tonometer S starts alignment (step SC1), the measuring head 9 is driven to perform alignment (step SC2), and when there is a forehead contact signal from the forehead sensor 82 ( The alignment operation is continued (YES in step SC3) (step SC4). When the alignment operation is completed (YES in step SC5), intraocular pressure measurement is performed (step SC6).

If the forehead detection signal disappears during the alignment operation (NO in step SC3), the alignment operation is stopped (step SC7), and it is determined whether the current alignment operation is in the first alignment operation or in the second alignment operation ( Step SC8). During the second alignment operation, that is, when the eye is close to the eye E, the measuring head 9 is moved backward. On the other hand, during the first alignment operation, that is, when the position of the distal end portion of the measuring head 9 is separated from the eye E, it remains stopped (NO in step SC8).
The position where the first alignment was switched to the second alignment during the alignment (the Z signal was obtained for the first time) is memorized, and if there is no forehead signal during the second alignment, if the head moves backward to this position, the forehead again When the signal is obtained, the alignment can be resumed from the second alignment in which both the XY and Z alignment signals are obtained.

  In the non-contact tonometer S according to the present embodiment, when the face portion HB is separated from the support portion 1, the stop or reverse operation is performed depending on the state of the alignment operation of the measurement head 9. Therefore, it is possible to reliably prevent the measurement head 9 from coming into contact with the eye E when the face HB is disposed on the support 1 again.

  In the first and second embodiments, the position of the face is determined by the forehead sensor provided in the forehead support part of the support part. However, the face part is photographed as the face position detection device. A photographing device and means for detecting the position of the face from the photographed image can be provided.

1: support part 1a: chin rest part 1b: forehead rest part 2: apparatus base 3: mount base 4: apparatus body 5: operation knob 5a: operation button 6: monitor 8: airflow spray nozzle 9: measuring head 10: measuring optical system 11: Air chamber 12: Anterior ocular window glass 15: First dichroic mirror 16: Imaging lens 17: Applanation sensor 19: Anterior ocular illumination light source 20: Infrared optical system 21: Infrared light source 22: Aperture 24: Second dichroic mirror 25: collimator lens 26: half mirror 27: anterior eye imaging system 28: imaging lens 29: anterior eye area sensor 30: fixation optical system 31: visible light source 32: aperture 40: Z-direction alignment optics System 50: Z alignment illumination 51: Light source 52: Condenser lens 53: Collimator lens 54: Aperture 60: Z alignment sensor 61: Line sensor 62: Imaging lens 0: Compressed air supply unit 71: Rotary solenoid 72: Pressure sensor 80: Support unit control unit 81: Jaw holder motor 82: Forehead sensor 91: Initial position setting switch 100: Drive device 110: Printer unit 120: Communication unit 130: Control Unit 140: arithmetic processing unit 150: drive control unit 151: main control unit 152: storage unit B: last retracted position D: standard position E: eye to be examined F: most advanced position HB: face O1: optical axis R: reference position S: Non-contact tonometer (ophthalmic device)

Claims (10)

A support part that supports the face of the subject;
An apparatus main body including an eyeball proximity portion in which a distal end portion is disposed close to the subject's eye to be examined;
A driving device that moves the device main body relative to the support portion to align the eyeball proximity portion with the eye to be examined;
In an ophthalmologic apparatus comprising a drive control device that controls driving of the drive device,
A face position detection device for detecting the position of the face relative to the support;
The drive control device stops an alignment operation by the drive device based on the position of the face portion detected by the face portion position detection device.   The ophthalmologic apparatus according to claim 1, wherein the face position detection device includes a forehead sensor that is disposed on the support portion and detects whether or not the face portion of the subject is in contact.   The said face part position detection apparatus is provided with the imaging device which image | photographs the said face part, and detects the position with respect to the said support part of the said face part based on the output of this imaging device. Ophthalmic equipment.   The drive control device performs control to stop the operation of the drive device when the face portion is separated from the support portion, or control to separate the eyeball proximity portion from the eye to be examined by the drive device. The ophthalmologic apparatus according to any one of claims 1 to 3. A predetermined reference position is set between a most advanced position where the eyeball proximity portion moves most toward the eye to be examined and a last retracted position where the eyeball proximity portion moves to the side opposite to the eye to be examined;
The first region from the most advanced position to the reference position, the second region from the reference position to the last retracted position,
The drive control device performs control to retract the eyeball proximity portion in a direction away from the eye to be examined when the distal end portion of the eyeball proximity portion is in the first region,
The ophthalmologic apparatus according to claim 1, wherein when the eyeball proximity portion is in the second region, control is performed to stop the eyeball proximity portion. The drive control device performs alignment in the up / down / left / right / front / rear directions based on alignment signals obtained for the respective directions of XYZ, sets predetermined conditions for alignment signals in at least one direction of XYZ, A first alignment operation for adjusting the position in the up / down / left / right / front / rear direction without satisfying
A second alignment operation for adjusting the position in a state where the condition is satisfied;
When doing
When the face part is separated from the support part,
In a state where the first alignment operation is performed, control is performed to stop the eyeball proximity portion,
In a state where the second alignment operation is performed, control is performed to retract the eyeball proximity portion in a direction away from the eye to be examined.
The ophthalmic apparatus according to claim 1.   7. The apparatus according to claim 1, further comprising an output unit configured to output that the face portion is separated from the support portion when the face portion of the subject is separated from the support portion. The ophthalmic apparatus according to item. A support unit that supports the face of the subject, an apparatus main body that includes an eyeball proximity unit in which a distal end portion is disposed close to the subject's eye, and the apparatus main body is moved relative to the support unit to In a control method of an ophthalmologic apparatus comprising a driving device that aligns an eyeball proximity portion with the eye to be examined,
Detecting the position of the face relative to the support of the subject,
A control method for an ophthalmologic apparatus, wherein the driving device is stopped when the face portion is separated from the support portion, or the eyeball proximity portion is separated from the eye to be examined. A predetermined reference position is set between a most advanced position where the eyeball proximity portion moves most toward the eye to be examined and a last retracted position where the eyeball proximity portion moves to the side opposite to the eye to be examined;
The first region from the most advanced position to the reference position, the second region from the reference position to the last retracted position,
When the tip of the eyeball proximity portion is in the first region, the eyeball proximity portion is retracted in a direction away from the eye to be examined,
When the eyeball proximity portion is in the second region, the eyeball proximity portion is stopped.
The method for controlling an ophthalmologic apparatus according to claim 8. The drive control device performs alignment in the up / down / left / right / front / rear directions based on alignment signals obtained for the respective directions of XYZ, sets predetermined conditions for alignment signals in at least one direction of XYZ, A first alignment operation for adjusting the position in the up / down / left / right / front / rear direction without satisfying
A second alignment operation for adjusting the position in a state where the condition is satisfied;
When doing
When the face part is separated from the support part,
In the state of performing the first alignment operation, the eyeball proximity portion is stopped,
In the state in which the second alignment operation is performed, the eyeball proximity portion is retracted in a direction away from the eye to be examined.
The method for controlling an ophthalmologic apparatus according to claim 8.