JP2022183272A - Ophthalmologic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmologic apparatus capable of easily checking the conditions of a subject's eyes.

SOLUTION: An ophthalmologic apparatus 10 comprises: an eye information acquisition unit 21 for acquiring fundus information images (Ri) related to the fundus oculi Ef of a subject's eyes E on an optical axis L; an imaging unit (26) provided at a position different from a position on the optical axis L to acquire subject eye images Ie of the subject's eyes E; a control unit 27 for determining the positions of the subject's eyes E on the basis of at least two subject eye images Ie acquired by the imaging unit; and a display unit 35 for displaying the fundus information images under the control of the control unit 27. The control unit 27 acquires the trajectories of moving of the characteristic positions of the subject eye images Ie from the imaging unit (26).

SELECTED DRAWING: Figure 8

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present disclosure relates to ophthalmic devices.

Some ophthalmologic apparatuses include an eye information acquiring unit capable of acquiring a fundus information image related to the fundus of an eye to be examined (see, for example, Patent Document 1).

Such an ophthalmologic apparatus acquires a fundus information image such as an image of reflected measurement light reflected by the fundus or an image of the fundus, and displays the fundus information image on a display unit, thereby determining the eye characteristics of the subject's eye based on the fundus information image. It is possible to obtain the

JP 2014-200678

Here, in the above-described ophthalmologic apparatus, when good eye characteristics are not obtained, there are cases where it is the correct eye characteristics of the eye to be examined, but the cause is that the fundus information image is not properly acquired. In some cases. However, with the above-described ophthalmologic apparatus, it is difficult to determine whether or not the fundus information image displayed on the display unit has been properly acquired. Since the above-described ophthalmologic apparatus confirms the state of the fundus information image when obtaining the ocular characteristics of the subject's eye, it is difficult to confirm the state of the subject at the same time as the fundus information image on the display unit. be.

The present disclosure has been made in view of the circumstances described above, and an object thereof is to provide an ophthalmologic apparatus that enables easy confirmation of the condition of an eye to be examined.

In order to solve the above-described problems, the ophthalmologic apparatus of the present disclosure includes an eye information acquisition unit that acquires a fundus information image related to the fundus of an eye to be inspected on an optical axis, and an eye information acquisition unit that is provided at a position different from the optical axis. an imaging unit that acquires an image of the eye to be inspected; a control unit that obtains the position of the eye to be inspected based on at least two images of the eye to be inspected acquired by the imaging unit; and the fundus information under the control of the control unit. a display unit that displays an image, wherein the control unit acquires a trajectory of movement of the feature position in the image of the subject's eye from the imaging unit.

According to the ophthalmologic apparatus of the present disclosure, it is possible to easily confirm the state of the subject's eye.

1 is an explanatory diagram showing the overall configuration of an ophthalmologic apparatus according to a first embodiment as an example of an ophthalmologic apparatus according to the present disclosure; FIG. FIG. 4 is an explanatory view schematically showing a configuration in which a pair of measuring heads are movable via a drive mechanism in an ophthalmologic apparatus; FIG. 3 is an explanatory diagram showing a schematic configuration of an eye information acquisition unit of an ophthalmologic apparatus; 3 is a block diagram showing the configuration of the control system of the ophthalmologic apparatus; FIG. FIG. 4 is an explanatory diagram showing the configuration of an optical system of an eye information acquisition unit; FIG. 10 is an explanatory diagram showing how a control unit converts an image of an eye to be inspected obtained from a fundus information image into a front image of the eye to be inspected viewed from a virtual viewpoint; 4 is a flow chart showing measurement processing (measurement method) executed by the control unit of the ophthalmologic apparatus. It is a figure which shows an example of the image displayed on the display part of an ophthalmologic apparatus.

Example 1 of an ophthalmic device 10 as one embodiment of the ophthalmic device according to the present disclosure will be described below with reference to FIGS. 1 to 8. FIG. 5 and 6 omit the deflecting member 25 in order to facilitate understanding of the respective configurations.

As shown in FIG. 1, the ophthalmologic apparatus 10 includes a base 11 installed on the floor, an optometry table 12, a column 13, an arm 14 as a support, a drive mechanism 15, and a pair of measurement heads. 16 and. The ophthalmologic apparatus 10 is configured such that the subject facing the eye examination table 12 presses the forehead against the forehead support 17 provided between the measuring heads 16, and the subject's eye to be examined E (see FIG. 3). etc.). Hereinafter, when viewed from the subject, the left-right direction is the X direction, the up-down direction (vertical direction) is the Y direction, and the direction orthogonal to the X and Y directions (the depth direction of the measurement head 16 (the subject side is The front side)) is the Z direction.

The optometry table 12 is a desk on which an examiner controller 31 and a subject controller 32 (see FIG. 4), which will be described later, are placed, and objects used for optometry are placed, and is supported by the base 11 . . The optometric table 12 may be supported by the base 11 so that its position in the Y direction (height position) can be adjusted.

The post 13 is erected in the Y direction from the rear end of the optometry table 12, and an arm 14 is provided on the top. The arm 14 suspends a pair of measuring heads 16 on the optometry table 12 via a drive mechanism 15, and extends in the Z direction from the column 13 toward the near side. The arm 14 is movable in the Y direction with respect to the column 13, and its position (height position) in the Y direction is adjusted by an arm drive mechanism 34 (see FIG. 4), which will be described later. In addition, the arm 14 may be movable in the X direction and the Z direction with respect to the column 13 . Both measuring heads 16 are suspended from the tip of the arm 14 by a drive mechanism 15 and supported.

The measuring heads 16 are provided in pairs so as to individually correspond to the left and right eyes E of the subject to be examined. do. The left eye measurement head 16L acquires information on the left eye E of the subject, and the right eye measurement head 16R acquires information on the right eye E of the subject. The left-eye measurement head 16L and the right-eye measurement head 16R are configured to be symmetrical with respect to a vertical plane positioned between them in the X direction.

Each measuring head 16 includes an eye information acquisition unit 21 (referred to as a right eye information acquisition unit 21R and a left eye information acquisition unit 21L (see FIG. 2) when describing separately) for acquiring eye information of the eye E to be examined. Contained. The eye information includes an image of the eye E to be examined, an image of the fundus Ef of the eye E to be examined (see FIG. 4), a tomographic image of the retina of the eye E to be examined, the refractive power of the eye E to be examined, and the like. Each eye information acquiring unit 21 includes a visual acuity testing device that performs visual acuity testing while switching the visual target to be presented, a phoropter that switches and arranges corrective lenses to acquire the appropriate corrective refractive power of the subject's eye E, and measures the refractive power. A refractometer, a wavefront sensor, a fundus camera that captures an image of the fundus, a tomography device (OCT (Optical Coherence Tomography)) that captures a tomographic image of the retina, and the like are configured singly or in combination. The ophthalmologic apparatus 10 can include, as eye information, a corneal endothelium image of the eye to be examined E, a corneal shape of the eye to be examined E, and an intraocular pressure of the eye to be examined E. A specular microscope for taking images, a keratometer for measuring corneal shape, a tonometer for measuring intraocular pressure, and the like can be included. However, the specular microscope, keratometer, and tonometer do not have the problem of the present disclosure that the anterior segment image cannot be confirmed on the display unit 35 during measurement, which will be described later. The ophthalmologic apparatus of the present disclosure does not include the eye information acquisition unit 21 configured by a combination of only.

Both measuring heads 16 are movably suspended by a drive mechanism 15 via a mounting base portion 18 provided at the tip of the arm 14, as shown in FIG. In the first embodiment, the drive mechanism 15 includes a left vertical drive unit 22L, a left horizontal drive unit 23L, and a left rotation drive unit 24L corresponding to the left eye measurement head 16L, and a right vertical drive unit corresponding to the right eye measurement head 16R. It has a portion 22R, a right horizontal drive portion 23R and a right rotation drive portion 24R. The configuration of each drive unit corresponding to the left eye measurement head 16L and the configuration of each drive unit corresponding to the right eye measurement head 16R are plane symmetrical with respect to a vertical plane positioned between them in the X direction. They are simply referred to as a vertical driving section 22, a horizontal driving section 23, and a rotary driving section 24 unless otherwise specified. The drive mechanism 15 is provided with a vertical drive section 22, a horizontal drive section 23, and a rotation drive section 24 in this order from the arm 14 side.

The mounting base portion 18 is fixed to the tip of the arm 14 and extends in the X direction. A right vertical drive section 22R, a right horizontal drive section 23R, and a right rotational drive section 24R are suspended from the ends. A forehead support portion 17 is provided in the central portion of the mounting base portion 18 .

The vertical driving portion 22 is provided between the mounting base portion 18 and the horizontal driving portion 23 and moves the horizontal driving portion 23 in the Y direction (vertical direction) with respect to the mounting base portion 18 . The horizontal drive section 23 is provided between the vertical drive section 22 and the rotation drive section 24 and moves the rotation drive section 24 with respect to the vertical drive section 22 in the X direction and the Z direction (horizontal direction). The vertical drive unit 22 and the horizontal drive unit 23 include an actuator such as a pulse motor that generates a driving force, and a transmission mechanism that transmits the driving force such as a combination of gears or a rack and pinion. set up and configured. The horizontal drive unit 23 can be easily configured and easily controlled for movement in the horizontal direction by providing separate combinations of actuators and transmission mechanisms for the X and Z directions, for example.

The rotation drive unit 24 is provided between the horizontal drive unit 23 and the corresponding measurement head 16, and rotates the corresponding measurement head 16 with respect to the horizontal drive unit 23 around the eyeball rotation axis of the corresponding subject's eye E. . The rotation drive unit 24 has, for example, an actuator and a transmission mechanism similar to the vertical drive unit 22 and the horizontal drive unit 23, and the transmission mechanism receives driving force from the actuator and moves along an arcuate guide groove. configuration. The rotation drive unit 24 can rotate the measurement head 16 around the eyeball rotation axis of the eye E to be examined by aligning the center position of the guide groove with the eyeball rotation axis. The rotary drive unit 24 supports the measuring head 16 so as to be rotatable around its own rotation axis, and cooperates with the horizontal drive unit 23 to rotate the measuring head 16 while changing the supporting position. , the measurement head 16 may be rotated around the eyeball rotation axis of the eye E to be examined.

As a result, the drive mechanism 15 can move the measurement heads 16 individually or in conjunction with each other in the X, Y, and Z directions, and rotate the respective measuring heads 16 around the eyeball rotation axis of the corresponding eye E to be examined. It can be rotated, and each measuring head 16 can be moved to a position corresponding to the rotation of the corresponding eye E to be examined. By adjusting the position of each measuring head 16, the driving mechanism 15 can cause the corresponding subject's eye E to diverge (divergence movement) or converge (convergence movement). As a result, the ophthalmologic apparatus 10 can perform a divergence motion test and a convergence motion test, perform a distance test and a near test in a state of binocular vision, and measure various characteristics of both eyes E to be examined. .

Each measuring head 16 is provided with a deflecting member 25 , and through the deflecting member 25 the eye information acquisition unit 21 acquires information on the corresponding eye E to be examined. As shown in FIG. 3, the ophthalmologic apparatus 10 adjusts the positions of the measuring heads 16 so that the deflecting members 25 are positioned corresponding to the left and right eyes E of the subject. With both eyes open (binocular vision state), information on the subject's eye E can be acquired simultaneously with both eyes.

Each measuring head 16 has a plurality of cameras 26 as imaging units in the vicinity of the deflecting member 25 . In Example 1, two cameras 26 are provided across the optical axis L of the eye information acquisition unit 21 in the front and rear (Z direction), and constitute a stereo camera. Each camera 26 receives the light from the corresponding eye E to be inspected through the deflecting member 25 with the direction of travel thereof being bent, so that each camera 26 receives the light from the eye to be inspected from different directions and obliquely (positions inclined with respect to the front). An image of the subject's eye Ie, which is an image of E, is acquired. For this reason, each camera 26 forms a pair in the front and rear (Z direction) with respect to the corresponding eye E to be examined, but by interposing the deflecting member 25, the cameras 26 substantially move left and right (X direction) with respect to the eye E to be examined. ), the image Ie of the subject's eye is acquired obliquely. As a result, one of the cameras 26 becomes an outer camera 26o that acquires the subject's eye image Ie from the outside of the subject (the side opposite to the nose with respect to the subject's eye E), and the other acquires the subject's eye image Ie from the inside of the subject. It becomes the inner camera 26i to acquire.

Here, the cameras 26 may be provided in a pair substantially vertically (in the Y direction) with respect to the subject's eye E. Since the area hidden by the eyelid with respect to the subject's eye E becomes large, it is desirable to acquire the subject's eye image Ie from the left and right (X direction), which have less influence even in the same situation. In addition, since elderly subjects tend to droop their eyelids, it is desirable to provide the cameras 26 in such a positional relationship that the subject's eye images Ie are acquired obliquely downward in the left and right (X direction).

Both cameras 26 can acquire two different images Ie of the eye to be inspected at the same point in time by photographing the eye E to be inspected substantially at the same time. Here, "substantially at the same time" means that, in photographing by both cameras 26, a difference in photographing timing to the extent that eye movement can be ignored is allowed. Both cameras 26 capture images of the subject's eye E substantially simultaneously from different directions, thereby making it possible to acquire two or more subject's eye images Ie when the subject's eye E is in the same position (orientation). As a result, both cameras 26 can be used to calculate the three-dimensional position of the subject's eye E, as will be described later.

The base 11 is provided with a control unit 27 that is housed in a control box and that controls each part of the ophthalmologic apparatus 10 (see FIG. 1). As shown in FIG. 4, the control unit 27 includes the above-described eye information acquisition unit 21, each vertical driving unit 22 as the driving mechanism 15, each horizontal driving unit 23, each rotation driving unit 24, and each camera 26, In addition, the controller for examiner 31, the controller for examinee 32, the storage unit 33, and the arm driving mechanism 34 are connected. In the ophthalmologic apparatus 10, power is supplied from a commercial power supply to a control unit 27 via a cable 28 (see FIGS. 1 and 2), and the control unit 27 controls the drive mechanism 15 and both measurement heads 16 (both eye information acquisition unit 21). to power the The control unit 27 can exchange information with the drive mechanism 15 and both measurement heads 16 (binocular information acquisition unit 21), controls their operations, and acquires information from them as appropriate.

The examiner controller 31 is used by the examiner to operate the ophthalmologic apparatus 10 . The examiner controller 31 is communicably connected to the controller 27 via short-range wireless communication. Note that the examiner controller 31 is not limited to the configuration of the first embodiment as long as it is connected to the control unit 27 via a wired or wireless communication path. A portable terminal (information processing device) such as a tablet terminal or a smartphone is used as the examiner controller 31 of the first embodiment. Therefore, the examiner's controller 31 can be operated by being held by the examiner's hand or placed on the optometry table 12 and operated. It can be operated from anywhere, increasing the degree of freedom of the examiner during measurement. Note that the controller for examiner 31 is not limited to a mobile terminal, and may be a notebook personal computer, a desktop personal computer, or the like, and may be configured by being fixed to the ophthalmologic apparatus 10. Not limited to configuration.

The examiner controller 31 includes a display section 35 consisting of a liquid crystal monitor. The display unit 35 has a display surface 35a (see FIGS. 1, 8, etc.) on which images and the like are displayed, and a touch panel type input unit 35b superimposed thereon. Under the control of the controller 27, the examiner controller 31 generates an anterior segment image I (see FIG. 5) based on an image signal from an imaging device 41g provided in the observation system 41, which will be described later, and an image from each camera 26. The image Ie to be inspected, the measurement ring image Ri (see FIG. 8) based on the image signal from the imaging device 41g, and the fundus information image such as the fundus image are appropriately displayed on the display surface 35a. Further, the examiner controller 31 outputs to the control unit 27 operation information such as an alignment instruction and a measurement instruction which are displayed on the input unit 35 b under the control of the control unit 27 and input there.

The examinee controller 32 is used by the examinee to respond when obtaining various types of eye information about the eye E to be examined. The subject controller 32 is, for example, an input device such as a keyboard, mouse, or joystick. The subject controller 32 is connected to the controller 27 via a wired or wireless communication path.

The control unit 27 appropriately controls the controller 31 for the examinee and the controller 32 for the examinee by expanding the program stored in the connected storage unit 33 or the built-in internal memory 27a on, for example, a RAM (random access memory). The operation of the ophthalmologic apparatus 10 is centrally controlled according to the operation. In the first embodiment, the internal memory 27a is composed of a RAM or the like, and the storage unit 33 is composed of a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable ROM), or the like. In addition to the configuration described above, the ophthalmologic apparatus 10 is appropriately provided with a printer that prints the measurement results in response to a measurement completion signal or an instruction from the measurer, and an output unit that outputs the measurement results to an external memory or server.

Next, an optical configuration as an example of the eye information acquisition section 21 will be described with reference to FIG. As described above, the configurations of the right eye information acquisition section 21R and the left eye information acquisition section 21L are basically the same, and therefore the eye information acquisition section 21 will be simply described.

As shown in FIG. 5, the optical system of the eye information acquisition unit 21 includes an observation system 41, a target projection system 42, an eye refractive power measurement system 43, a subjective inspection system 44, a Z alignment optical system 45, and an XY alignment optical system. 46 and a kerat system 47 . The observation system 41 observes the anterior segment of the subject's eye E, the target projection system 42 presents a target to the subject's eye E, and the eye refractive power measurement system 43 measures the eye refractive power. The subjective examination system 44 has a function of presenting an optotype to the eye E to be examined, and shares an optical element constituting an optical system with the optotype projection system 42 . The Z alignment optical system 45 and the XY alignment optical system 46 align the optical system with the eye E to be inspected. The Z alignment optical system 45 generates alignment information in the front-rear direction (Z direction) along the optical axis L of the observation system 41, and the XY alignment optical system 46 generates alignment information in the vertical and horizontal directions (Y direction, X direction) orthogonal to the optical axis L. orientation).

The observation system 41 has an objective lens 41a, a dichroic filter 41b, a half mirror 41c, a relay lens 41d, a dichroic filter 41e, an imaging lens 41f, and an imaging device 41g. The observation system 41 forms an image on the imaging device 41g (its light receiving surface) by the image forming lens 41f via the objective lens 41a from the light flux reflected by the eye E (anterior segment). Therefore, an anterior ocular segment image I is formed on the imaging element 41g by projecting a keratling light flux, a light flux from the alignment light source 45a, and a light flux (bright spot image) from the alignment light source 46a, which will be described later. The control unit 27 causes the display surface 35a of the display unit 35 to display the anterior segment image I based on the image signal output from the imaging device 41g. A kerato system 47 is provided in front of the objective lens 41a.

The kerato system 47 has a kerato plate 47a and a kerato ring light source 47b. The kerato plate 47a has a plate shape provided with a slit concentric with respect to the optical axis L of the observation system 41, and is provided near the objective lens 41a. The keratizing light source 47b is provided in alignment with the slit of the keratoplate 47a. In the keratometry system 47, a keratometry beam (for corneal curvature measurement) for measuring the shape of the cornea is directed to the subject's eye E (its cornea Ec) by passing a luminous flux from a lighted keratometry light source 47b through a slit in a keratoplate 47a. A ring-shaped optotype) is emitted (projected). This keratling luminous flux is reflected by the cornea Ec of the subject's eye E, and is imaged on the imaging device 41g by the observation system 41. The imaging device 41g detects an image (image) of the ring-shaped keratling luminous flux. (receiving). Based on the image signal from the imaging device 41g, the control unit 27 displays the image of the measurement pattern on the display surface 35a, and measures the corneal shape (curvature radius) by a well-known technique. Therefore, the keratometric system 47 projects a light beam onto the anterior segment (cornea Ec) of the eye E to be inspected, and measures the corneal shape of the eye E to be inspected from reflected light from the anterior segment (cornea Ec). It functions as a shape measurement system. In addition, in Example 1, an example (kerato system 47) using a keratoplate 47a for measuring the curvature of the vicinity of the center of the cornea with one to three ring slits is shown as the corneal topography measurement system. As long as the shape is measured, a placide plate having multiple rings and capable of measuring the shape of the entire cornea may be used, or other configurations may be used. A Z alignment optical system 45 is provided behind the kerato system 47 (kerato plate 47a).

The Z alignment optical system 45 has a pair of alignment light sources 45a and a projection lens 45b. The light beams from each alignment light source 45a are collimated by each projection lens 45b, and projected through an alignment hole provided in a kerat plate 47a. The parallel light flux is projected (projected) onto the cornea Ec of E. Thereby, a target for alignment is projected onto the cornea of the eye E to be examined. This visual target is detected as a virtual image (Purkinje image) due to corneal surface reflection. Alignment using a target is alignment in the direction of the optical axis L of the optical system of the eye information acquisition unit 21, that is, in the Z direction. Alignment using this target may include alignment in the X direction and the Y direction.

The control unit 27 drives the horizontal driving unit 23 to move the measuring head 16 in the front-rear direction (Z direction) based on the alignment information of the target for alignment, thereby adjusting the optical system of the eye information acquisition unit 21. Alignment in the front-rear direction (Z direction) along the optical axis L can be performed. This longitudinal alignment is performed by adjusting the position of the measuring head 16 so that the ratio of the distance between the two bright spot images by the alignment light source 45a on the imaging device 41g and the diameter of the keratling image is within a predetermined range. Here, the control unit 27 may obtain the amount of misalignment from the ratio and display the amount of misalignment on the display surface 35a. Note that the alignment in the front-rear direction may be performed by adjusting the position of the right-eye measurement head 16R so that the luminescent spot image by the alignment light source 46a, which will be described later, is in focus.

Also, the observation system 41 is provided with an XY alignment optical system 46 . The XY alignment optical system 46 has an alignment light source 46a and a projection lens 46b, and shares the half mirror 41c, the dichroic filter 41b and the objective lens 41a with the observation system 41. The XY alignment optical system 46 projects the light flux from the alignment light source 46a onto the cornea Ec as a parallel light flux through the objective lens 41a. The control unit 27 acquires alignment information (for example, movement amounts in the Y and X directions) based on the bright spots projected onto the cornea Ec on the anterior segment image I (the bright spot image). Based on this alignment information, the control unit 27 drives the vertical driving unit 22 and the horizontal driving unit 23 to move the measuring head 16 in the horizontal direction (X direction) and the vertical direction (Y direction). Alignment is performed in the direction (the direction perpendicular to the optical axis L). At this time, the control unit 27 causes the display surface 35a to display an alignment mark AL, which serves as a guide for the alignment mark, in addition to the anterior segment image I in which the bright spot image is formed. Further, the control unit 27 may be configured to perform control so as to start measurement when alignment is completed.

The visual target projection system 42 (subjective inspection system 44) includes a display 42a, a half mirror 42b, a relay lens 42c, a reflecting mirror 42d, a focusing lens 42e, a relay lens 42f, a field lens 42g, and a variable cross cylinder lens (VCC) 42h. , a reflecting mirror 42i and a dichroic filter 42j, and shares the dichroic filter 41b and the objective lens 41a with the observation system 41. FIG. In addition, the subjective examination system 44 has at least two glare light sources 42k that irradiate the subject's eye E with glare light at positions surrounding the optical axis on optical paths other than the optical path leading to the display 42a and the like. The display 42a presents a fixation target or a point-like target as a target for fixing the line of sight of the eye E to be examined, or displays characteristics of the eye E to be examined (visual acuity value, correction power (distance power, near power), etc.). ) is presented as a subjective test optotype for subjectively testing. The display 42 a can use EL (electroluminescence) or a liquid crystal display (LCD), and displays any image under the control of the control section 27 . The display 42a is movably provided along the optical axis at a position conjugate with the fundus Ef of the subject's eye E on the optical path of the optotype projection system 42 (subjective examination system 44).

In the target projection system 42 (subjective examination system 44), a pinhole plate 42p is placed at a position (between the field lens 42g and the VCC 42h in the first embodiment) that is substantially conjugate with the pupil of the eye to be examined E on the optical path. set up. The pinhole plate 42p is formed by providing a through hole in a plate member, and is capable of being inserted into and removed from the optical path of the optotype projection system 42 (subjective examination system 44) under the control of the control unit 27. so that the through hole is positioned on the optical axis when inserted into the optical path. By inserting the pinhole plate 42p into the optical path in the subjective inspection mode, it is possible to perform a pinhole test for determining whether or not the subject's eye E can be corrected with spectacles. The pinhole plate 42p may be provided at a position substantially conjugate with the pupil of the subject's eye E on the optical path, and is not limited to the configuration of the first embodiment.

The eye refractive power measurement system 43 includes a ring-shaped light flux projection system 43A that projects a ring-shaped measurement pattern onto the fundus Ef of the eye to be examined E, and a ring that detects (receives) the reflected light of the ring-shaped measurement pattern from the fundus Ef. and a light receiving system 43B. The ring-shaped beam projection system 43A has a reflector light source unit 43a, a relay lens 43b, a pupil ring diaphragm 43c, a field lens 43d, a perforated prism 43e, and a rotary prism 43f. The dichroic filter 41 b and the objective lens 41 a are shared with the observation system 41 . The reflector light source unit 43a has, for example, a reflector measurement light source 43g for reflector measurement using an LED, a collimator lens 43h, a conical prism 43i, and a ring pattern forming plate 43j. It is integrally movable along the optical axis of the force measuring system 43 .

The ring-shaped light receiving system 43B has a hole portion 43p of a holed prism 43e, a field lens 43q, a reflecting mirror 43r, a relay lens 43s, a focusing lens 43t, and a reflecting mirror 43u. A dichroic filter 41e, an imaging lens 41f, and an imaging device 41g are shared with the observation system 41, a dichroic filter 42j is shared with a target projection system 42 (subjective examination system 44), and a rotary prism 43f and a perforated prism 43e are used as a ring. It is shared with the shaped beam projection system 43A.

The eye refractive power measurement system 43 measures the eye refractive power of the subject's eye E under the control of the control unit 27 in the eye refractive power measurement mode as follows. First, the reflector measurement light source 43g of the ring-shaped beam projection system 43A is turned on, and the reflector light source unit 43a of the ring-shaped beam projection system 43A and the focusing lens 43t of the ring-shaped beam receiving system 43B are moved in the optical axis direction. be. In the ring-shaped luminous flux projection system 43A, the reflector light source unit 43a emits a ring-shaped measurement pattern. It is reflected by the reflecting surface 43v and led to the dichroic filter 42j through the rotary prism 43f. The ring-shaped beam projection system 43A projects the ring-shaped measurement pattern onto the fundus Ef of the subject's eye E by guiding the measurement pattern to the objective lens 41a through the dichroic filters 42j and 41b.

In the ring-shaped light receiving system 43B, the ring-shaped measurement pattern formed on the fundus oculi Ef is collected by the objective lens 41a, passed through the dichroic filter 41b, the dichroic filter 42j, and the rotary prism 43f to the hole 43p of the perforated prism 43e. proceed. In the ring-shaped light receiving system 43B, the measurement pattern passes through a field lens 43q, a reflecting mirror 43r, a relay lens 43s, a focusing lens 43t, a reflecting mirror 43u, a dichroic filter 41e, and an imaging lens 41f, and is transferred to an imaging device 41g. form an image. As a result, the imaging element 41g detects an image of the ring-shaped measurement pattern (hereinafter also referred to as a measurement ring image Ri), and the measurement ring image Ri is appropriately displayed on the display surface 35a of the display unit 35 (see FIG. 8). ). Based on the measurement ring image Ri (image signal from the imaging element 41g), the control unit 27 informs the spherical power S, the cylindrical power C (cylinder power), and the axis angle Ax (cylinder axis angle) as eye refractive power. Calculated by the method of Here, reflected light from the subject's eye E is guided onto the imaging element 41g via each optical member (reference numerals 41a to 41f) of the observation system 41, and the resulting anterior segment image I is obtained by eye refractive power measurement. There is a risk of being superimposed on the measurement ring image Ri by the system 43 . Therefore, in the eye information acquisition unit 21, a shutter mechanism capable of blocking the optical path is provided between the dichroic filters 41b and 41e of the observation system 41, so that when the eye refractive power measurement system 43 acquires the measurement ring image Ri, The optical path of the observation system 41 may be blocked by a shutter mechanism to prevent the anterior segment images I from being superimposed.

In the eye refractive power measurement mode, the control unit 27 causes the display 42a of the target projection system 42 to display a fixed fixation target. A light beam from the display 42a passes through a half mirror 42b, a relay lens 42c, a reflecting mirror 42d, a focusing lens 42e, a relay lens 42f, a field lens 42g, a VCC 42h, a reflecting mirror 42i, a dichroic filter 42j, a dichroic filter 41b, and an objective lens 41a. Then, light is emitted (projected) onto the fundus Ef of the eye E to be examined. The examiner or the control unit 27 performs alignment with the examinee fixating the presented fixed fixation target, and aligns the subject with the far point of the subject's eye E based on the results of the provisional measurement of the eye refractive power (ref). After moving the focusing lens 42e, the focusing lens 42e is moved to a position out of focus to create a cloudy state. As a result, the subject's eye E enters an accommodation resting state (a state in which the crystalline lens is adjusted and removed), and the eye refractive power is measured in the accommodation resting state.

Other measurements (subjective tests, etc.) using the eye information acquisition unit 21 (its optical system) as described above are performed in the same manner as described in, for example, Japanese Unexamined Patent Application Publication No. 2017-63978. be able to.

Under the control of the control unit 27, the ophthalmologic apparatus 10 acquires the eye information of the subject's eye E using the eye information acquisition unit 21 while performing auto-alignment (automatic alignment). Specifically, the control unit 27 operates the eye information acquisition unit 21 (its Z alignment optical system 45 and XY alignment optical system 46) and the drive mechanism 15 (vertical drive unit 22, horizontal drive unit 23 and rotation drive unit 24). Then, the eye information acquisition unit 21 (measuring head 16) is aligned in the XYZ directions with respect to the corresponding subject eye E based on the alignment information from both the alignment optical systems. After that, the control unit 27 drives the eye information acquisition unit 21 appropriately to acquire various types of eye information of the eye E to be examined. In the ophthalmologic apparatus 10, the eye information acquiring unit 21 is aligned with the eye E to be inspected manually, that is, the examiner operates the controller 31 for the examiner, and the eye information acquiring unit 21 is driven to perform various operations on the eye E to be inspected. eye information can also be obtained. In the ophthalmologic apparatus 10, when acquiring various types of eye information about the eye E to be examined, the subject can respond by operating the controller 32 for subject. assist.

The ophthalmologic apparatus 10 can perform auto-alignment of the eye information acquisition unit 21 using both cameras 26 (eye image Ie to be examined therefrom (data thereof)). At this time, the control unit 27 first detects a common feature position in each subject's eye image Ie from the paired cameras 26 . For example, if the position corresponding to the center of the pupil of the anterior segment is taken as the feature position, the control unit 27 determines the low-luminance image based on the distribution of the luminance value of each pixel of the image of the eye to be inspected Ie and its shape (positional relationship). Identify the pupil region by searching the region. After that, the control unit 27 detects the center of the pupil, that is, the feature position, by specifying the center position of the specified contour of the pupil region (its approximate circle or approximate ellipse) or obtaining the center of gravity of the pupil region. Note that the characteristic position may be another part of the anterior segment, or may be a bright spot image formed by the Z alignment optical system 45 or the XY alignment optical system 46, and is not limited to the configuration of the first embodiment. Then, the control unit 27 applies known trigonometry to the detected characteristic positions using the known positions and angles of both cameras 26, optical characteristics, etc. Calculate the three-dimensional position.

Based on the calculated three-dimensional position of the eye E, the control unit 27 aligns the optical axis L of the eye information acquisition unit 21 (its optical system) with the axis of the eye E to be inspected, and adjusts the eye information acquisition unit 21 for the eye E to be inspected. is a predetermined working distance (alignment information), and the driving mechanism 15 is controlled according to the calculated movement amount. Here, the working distance is a default value also called a working distance, and is the distance between the eye information acquisition unit 21 and the subject's eye E for appropriately measuring characteristics using the eye information acquisition unit 21 . The control unit 27 drives the drive mechanism 15 according to the amount of movement to move the eye information acquisition unit 21 with respect to the eye E to be examined, thereby performing auto-alignment of the eye information acquisition unit 21 using both cameras 26. be able to.

As described above, the ophthalmologic apparatus 10 uses the observation system 41 to acquire the anterior segment image I based on the image signal output from the imaging element 41g, and displays the image I on the display surface 35a of the display unit 35. can be made In addition, the ophthalmologic apparatus 10 is capable of displaying an eye image Ie acquired by each camera 26 (a front eye image If (see FIG. 8), which will be described later), on the display surface 35a. The ophthalmologic apparatus 10 of Example 1 uses the outer camera 26 o of the cameras 26 to generate the front image If of the eye to be examined. Note that the front eye image If may be generated using the inner camera 26i and displayed on the display surface 35a, and is not limited to the configuration of the first embodiment.

As shown in FIG. 6, the outer camera 26o captures the subject's eye E from a direction inclined outward from the subject with respect to the eye information acquisition unit 21 (its optical axis L) located in front of the subject's eye E. A captured eye image Ie is acquired. Although this image of the eye to be inspected Ie can grasp the state of the eye to be examined E, it is desirable that the eye to be examined E is viewed from the front in order to grasp it more accurately. Therefore, the control unit 27 sets a virtual viewpoint Vi in front of the subject's eye E, and converts the subject's eye image Ie into a front subject's eye image If viewed from the virtual viewpoint Vi. In Example 1, the virtual viewpoint Vi is set on the optical axis L of the eye information acquisition unit 21 . Using a well-known technique, the control unit 27 multiplies the coordinate values of each pixel of the image of the eye to be inspected Ie input from the outer camera 26o by various coefficients based on the angle of the outer camera 26o, etc., to obtain all the coordinates of the output pixels. A front eye image If viewed from the virtual viewpoint Vi is generated by performing a conversion process for forming values. At this time, since the depth position of the subject's eye image Ie changes along with the viewpoint conversion, it is substantially trapezoidally corrected to be the front subject's eye image If. This front image of the subject's eye If is substantially the same as the image of the subject's eye acquired by the outer camera 26o provided on the optical axis L as indicated by the two-dot chain line. Therefore, the control unit 27 appropriately displays the subject's eye image Ie and the front subject's eye image If from the outer camera 26 o on the display surface 35 a of the display unit 35 in addition to the anterior segment image I using the observation system 41 . (See FIG. 8). Note that the virtual viewpoint Vi can be appropriately set as long as it is in front of the subject's eye E, and is not limited to the configuration of the first embodiment. The ophthalmologic apparatus 10 of the first embodiment makes it possible to more accurately grasp the state of the eye E to be examined when the image from the outer camera 26o is displayed on the display surface 35a in order to confirm the state of the eye E to be examined. Therefore, the front image If is displayed on the display surface 35a instead of the image Ie.

Next, a measurement process (measuring method) as an example of measuring the eye refractive power of the subject's eye E in the eye refractive power measurement mode using the ophthalmologic apparatus 10 will be described with reference to FIG. This measurement process is executed by the control unit 27 based on a program stored in the storage unit 33 or the internal memory 27a. Each step (each process) of the flow chart of FIG. 7 will be described below. 7, the ophthalmologic apparatus 10 is activated, the browser or application of the examiner's controller 31 is activated, the display surface 35a is displayed, and the eye refractive power measurement mode is started by the input section 35b. be started. At this time, the subject is sitting on a chair or the like, and the forehead is applied to the forehead support portion 17 . In the flowchart of FIG. 7 of the first embodiment, each step (each process) is performed simultaneously by a pair of measurement heads 16 (binocular information acquisition unit 21), and measurements are performed simultaneously in the state of binocular vision. The outer camera 26o of each measuring head 16 simultaneously acquires the front eye image If (eye image Ie) and displays it on the display surface 35a. In addition, in the flowchart of FIG. 7 of Embodiment 1, moving images of the anterior segment image I and the front eye image If are displayed on the display surface 35a as will be described later. , is not limited to the configuration of the first embodiment.

In step S1, the anterior segment image of the subject's eye E is started to be displayed on the display surface 35a of the display unit 35, and the process proceeds to step S2. In step S1, the moving image of the anterior segment image I acquired by the observation system 41 is displayed on the display surface 35a. In step S1, the front image If (moving image) of the subject's eye from the outer camera 26o may be displayed on the display surface 35a.

In step S2, auto-alignment is executed, and the process proceeds to step S3. In step S2, as described above, auto-alignment of the eye information acquisition unit 21 is performed using both cameras 26 (eye image Ie to be examined (data thereof) therefrom). At this time, in step S2, a moving image of the subject's eye image Ie of the subject's eye E accompanying auto-alignment using both cameras 26 is displayed on the display surface 35a. In step S2, the anterior segment image I (front eye image If) similar to that in step S1 may also be displayed on the display surface 35a.

In step S3, rough measurement is performed using the eye refractive power measurement system 43, and the process proceeds to step S4. Rough measurement is a preliminary measurement for determining the amount of movement of the focusing lens 42e of the optotype projection system 42, the reflector light source unit 43a of the ring-shaped beam projection system 43A, and the focusing lens 43t of the ring-shaped beam receiving system 43B. It basically means to measure the approximate refractive power of the eye E to be examined. In step S3, the focusing lens 42e, the reflex light source unit 43a, and the focusing lens 43t are placed at the 0D (diopter) position, the target projection system 42 fixes the fixation target, and the eye refractive power measurement system 43 is used to project a ring-shaped measurement pattern onto the fundus Ef of the subject's eye E by means of the ring-shaped beam projection system 43A. Then, in step S3, the measurement ring image Ri of the ring-shaped measurement pattern is detected by the imaging element 41g by the ring-shaped light receiving system 43B, and the measurement ring image Ri is displayed on the display surface 35a of the display unit 35. The eye refractive power is measured based on the ring image Ri. In step S3, the front image If (moving image) of the eye to be examined from the outer camera 26o is displayed on the display surface 35a along with the measurement ring image Ri. In Example 1, as shown in FIG. 8, on the display surface 35a, the measurement ring image Ri for the left eye is displayed on the upper right, the measurement ring image Ri for the right eye is displayed on the upper left, and the left eye measurement ring image Ri is displayed on the lower right. , and the front image If of the right eye is displayed in the lower left.

In step S4, auto-alignment (re-alignment) is executed, and the process proceeds to step S5. In step S4, auto-alignment is executed as in step S2. At this time, as in step S2, a moving image of the anterior segment image of the subject's eye E accompanying auto-alignment using both cameras 26 is displayed on the display surface 35a. ) may also be displayed.

In step S5, fogging is performed using the visual target projection system 42, and the process proceeds to step S6. In step S5, the target projection system 42 is used to move the focusing lens 42e based on the refractive power of the eye obtained by the rough measurement in step S3, and then the cloudy state is set, and the subject's eye E is set in an accommodation pause state. At this time, in step S5, only the anterior segment image I from the observation system 41 or the front eye image If is displayed on the display surface 35a.

In step S6, the characteristics of the subject's eye E are measured using the eye refractive power measurement system 43, and the process proceeds to step S7. In step S6, the reflective light source unit 43a and the focusing lens 43t of the eye refractive power measurement system 43 are moved based on the eye refractive power obtained by the rough measurement in step S3, and the subject's eye E in the cloudy state (accommodative pause state) is moved. On the other hand, the eye refractive power measurement system 43 is used to detect the measurement ring image Ri. Further, in step S6, based on the measurement ring image Ri acquired by the eye refractive power measurement system 43, the spherical power, the cylindrical power, and the axial angle as the eye refractive power are calculated by a well-known method. At this time, in step S6, similarly to step S3, the measurement ring image Ri and the front eye image If from the outer camera 26o are displayed on the display surface 35a.

In step S7, the measured value is displayed, and this measurement process ends. In this step S7, the eye refractive powers (spherical power, cylindrical power, axial angle) of both eyes to be examined E measured in step S6 are displayed on the display surface 35a.

Thereby, the ophthalmologic apparatus 10 can measure the eye refractive power of the subject's eye E in the eye refractive power measurement mode. At this time, since the ophthalmologic apparatus 10 measures the eye refractive powers of both eyes to be examined E in a state of binocular vision, it is possible to obtain eye refractive powers in a more natural state and measure one eye at a time. It is possible to measure the ocular refractive powers of both eyes E to be examined in a short period of time.

Here, technical problems of the conventional ophthalmologic apparatus will be described. The problem of this technology is the same as that of the ophthalmologic apparatus 10 of the first embodiment unless the front image If based on the image Ie of the eye to be examined from the outer camera 26o is displayed on the display surface 35a. The device 10 will be used for explanation. Basically, the ophthalmologic apparatus 10 can acquire an anterior eye segment image I of the subject's eye E using the observation system 41 in the eye information acquisition unit 21 with the imaging element 41g, and displays the image I on the display surface 35a of the display unit 35. can be made Therefore, the ophthalmologic apparatus 10 enables confirmation of the state of the subject's eye E by confirming the anterior segment image I displayed on the display surface 35a.

By the way, when the ophthalmologic apparatus 10 measures the eye refractive power of the eye to be examined E using the eye refractive power measurement system 43 in the eye information acquiring unit 21, the eye fundus Ef of the eye to be examined E is measured by the ring-shaped light beam projection system 43A. The measurement ring image Ri formed in 1 is obtained by using the imaging device 41g of the observation system 41 with the ring-shaped light receiving system 43B. Therefore, when the eye refractive power measurement system 43 measures the eye refractive power of the subject's eye E, the ophthalmologic apparatus 10 acquires the measurement ring image Ri, that is, the image of the fundus Ef with the image sensor 41g. An anterior segment image I cannot be obtained. That is, the ophthalmologic apparatus 10 can photograph the anterior segment (cornea Ec) and the fundus oculi Ef of the subject's eye E, but since the single imaging element 41g is shared, only one of them can be photographed at the same time point, and is displayed. Display on the surface 35a is also not possible.

Here, when the measured eye refractive power (each numerical value thereof) is not good, the ophthalmologic apparatus 10 may be the correct eye refractive power of the subject's eye E, but the part of the measurement ring image Ri In some cases, the cause may be that the measurement ring image Ri has not been obtained properly, such as lack of . The case where the measurement ring image Ri cannot be obtained appropriately is due to the condition of the eye E to be examined, such as lack of fixation, oblique position, ptosis, or miosis of the pupil. can be considered. In addition, in the case of an apparatus such as the ophthalmologic apparatus 10 that performs measurement in a state of binocular vision, in addition to the above, there may be cases where binocular vision is not possible, there is suppression, the position of the head is tilted, and so on. It is also conceivable that the measurement ring image Ri cannot be properly acquired due to the state of the eye examination E. Moreover, it is difficult to determine from the measurement ring image Ri (the display thereof) whether or not it has been properly acquired. This determination can be made by confirming the state of the eye E to be examined when the measurement ring image Ri is acquired. It is difficult to confirm the state of the subject at the same time as the measurement ring image Ri on the surface 35a.

On the other hand, when the ophthalmologic apparatus 10 of the present disclosure measures the eye refractive power of the subject's eye E using the eye refractive power measuring system 43 of the eye information acquisition unit 21, the measurement obtained by the eye refractive power measuring system 43 The front eye image If from the outer camera 26o is displayed on the display surface 35a along with the ring image Ri. In this way, the ophthalmologic apparatus 10 acquires the front eye image If using the camera 26, and displays the front eye image If together with the measurement ring image Ri acquired by the imaging element 41g of the eye information acquisition unit 21 on the display surface 35a. to display. The camera 26 is provided separately from the optical system of the eye information acquisition unit 21 for alignment purposes, and is not used during measurement by the eye refractive power measurement system 43 . Therefore, the ophthalmologic apparatus 10 can make the measurement ring image Ri and the front eye image If visually recognizable only by looking at the display surface 35a while effectively using the camera 26. The state of eye examination E can be easily confirmed. Therefore, when the measurement ring image Ri is not properly acquired, the ophthalmologic apparatus 10 can immediately let the examiner know that fact, and regardless of whether each numerical value is satisfactory or not, the eye to be examined E can appropriately measure the refractive power of the eye. In particular, the ophthalmologic apparatus 10 displays the measurement ring image Ri and the front eye image If to be examined on the display surface 35a. Even if there is, the condition of the subject's eye E can be easily confirmed together with the condition of the measurement ring image Ri, which is more effective.

The ophthalmologic apparatus 10 generates a front eye image If viewed from a virtual viewpoint Vi set on the front side of the eye E to be examined, instead of the image Ie of the eye to be examined acquired by the outer camera 26o. If is displayed on the display surface 35a together with the measurement ring image Ri. That is, the ophthalmologic apparatus 10 displays the front eye image If instead of the eye image Ie to be inspected on the display surface 35a together with the measurement ring image Ri. Therefore, the ophthalmologic apparatus 10 can easily check whether fixation is not possible, oblique position, eyelid ptosis, miosis of the pupil, etc., and the state of the subject's eye E can be more accurately determined. can be grasped. In particular, the ophthalmologic apparatus 10 is an apparatus that performs measurement in a state of binocular vision, and displays front images If of both eyes E to be examined on the display surface 35a. It is possible to easily confirm whether the subject has poor vision, is restricted, or has a tilted head position, etc., and can more accurately grasp the state of the subject's eye E. In addition, since the ophthalmologic apparatus 10 sets the virtual viewpoint Vi on the optical axis L of the eye information acquisition unit 21, the front eye image If is approximately the anterior segment image I acquired by the eye information acquisition unit 21. It can be made equal and made more visible. In addition, since the control unit 27 generates the front eye image If, the ophthalmologic apparatus 10 has a function of using an image of the eye E viewed from the front (for example, for automatic eyelid closure detection). image recognition), the front eye image If can be used, and the camera 26 can be used more effectively.

In addition, the ophthalmologic apparatus 10 can also display the anterior segment image I and the front eye image If on the display surface 35a even when auto-alignment is performed. In this way, the ophthalmologic apparatus 10 makes it possible to easily check the state of the subject's eye E even when auto-alignment is performed. For this reason, the ophthalmologic apparatus 10 can easily grasp the cause when alignment cannot be performed, and can avoid such a situation in advance by alerting the examinee when alignment is likely to become impossible. becomes.

The ophthalmic device 10 of the first embodiment of the ophthalmic device according to the present disclosure can obtain the following effects.

When acquiring the measurement ring image Ri (fundus information image), the ophthalmologic apparatus 10 causes the display unit 35 to display the subject's eye image Ie from the camera 26 (capturing unit) together with the measurement ring image Ri. Therefore, when the measurement ring image Ri is not obtained properly, the ophthalmologic apparatus 10 can immediately inform the examiner of the fact, and the eye to be examined can be detected regardless of whether each numerical value is favorable or not. The E ocular refractive power can be adequately measured.

When acquiring the measurement ring image Ri (fundus information image), the ophthalmologic apparatus 10 converts the image of the eye to be inspected Ie into a front image of the eye to be inspected If viewed from a virtual viewpoint Vi in front of the eye to be inspected E, and obtains the measurement ring image. The front eye image If is displayed on the display unit 35 together with Ri. Therefore, the ophthalmologic apparatus 10 can grasp the state of the eye E to be examined more accurately.

The ophthalmologic apparatus 10 is provided with a pair of cameras 26 (photographing units) at different positions. The image Ie of the eye to be examined from 26 is displayed on the display unit 35 together with the measurement ring image Ri. For this reason, the ophthalmologic apparatus 10 prevents part of the subject's eye E from missing, such as when the subject's nose is high and the subject's nose is reflected in the subject's eye image Ie acquired by the camera 26, for example. Therefore, the condition of the subject's eye E can be grasped more accurately.

The ophthalmologic apparatus 10 causes the paired eye information acquiring units 21 to simultaneously acquire the measurement ring images Ri (fundus information images) and the paired cameras 26 (capturing units) to simultaneously acquire the images Ie of the subject's eyes. The measurement ring image Ri and the subject eye image Ie of the eye E to be examined are displayed on the display unit 35 . Therefore, the ophthalmologic apparatus 10 can more accurately grasp the state of the subject's eye E in the state of binocular vision.

Therefore, in the ophthalmologic apparatus 10 as an embodiment of the ophthalmologic apparatus according to the present disclosure, while the eye information acquisition unit 21 acquires the fundus information image (the measurement ring image Ri in the first embodiment), the subject's eye E at that time is It is possible to easily check the status.

The ophthalmologic apparatus of the present disclosure has been described above based on Example 1, but the specific configuration is not limited to Example 1, and does not depart from the gist of the invention according to each claim. Design changes, additions, etc. are permitted as long as

For example, in Example 1, the eye information acquisition unit 21 having the configuration described above is used. However, the eye information acquisition unit of the present disclosure can acquire a fundus information image related to the fundus Ef of the eye E to be examined on the optical axis L, and when acquiring an image of the anterior segment (cornea Ec) of the eye E to be examined, is not limited to the configuration of the first embodiment, as long as it cannot acquire the fundus information image. The fundus information image includes, for example, a fundus image obtained by photographing the fundus oculi Ef, an OCT photographed image, and the like.

In addition, in Example 1, the measurement heads 16 (eye information acquisition units 21) are provided in pairs so that the characteristics of the subject's eye E can be measured in a state of binocular vision. . However, the ophthalmologic apparatus of the present disclosure may be configured to measure the characteristics of the subject's eye E in the state of monocular vision, and is not limited to the configuration of the first embodiment.

Furthermore, in Example 1, each measuring head 16 is provided with a pair of cameras 26 . However, the camera 26 acquires the subject's eye image Ie from a position different from the optical axis L of the eye information acquisition unit 21, and the control unit 27 determines the position of the subject's eye E based on the subject's eye image Ie. The position and the number may be appropriately set as long as they can be obtained, and are not limited to the configuration of the first embodiment. Here, when three or more cameras 26 are provided corresponding to a single eye E to be examined, the three-dimensional position of the eye E to be examined can be calculated as in the first embodiment. Further, when one camera 26 is provided corresponding to a single subject eye E, for example, by acquiring two or more subject eye images Ie while changing the position with respect to the subject eye E, , the three-dimensional position of the eye to be examined E can be calculated by using the trajectory of movement of the feature position in each eye image Ie to be examined. In addition, although the camera 26 is provided inside the measurement head 16, it may be provided outside the measurement head 16 (its housing) as long as the position is different from the optical axis L of the eye information acquisition unit 21. Well, it is not limited to the configuration of the first embodiment.

10 ophthalmologic apparatus 21 eye information acquisition unit 26 camera (as an example of an imaging unit) 27 control unit 35 display unit E eye to be examined Ef fundus Ie image of eye to be examined If front image of eye to be examined L optical axis Ri (as an example of fundus information image ) Measurement ring image Vi Virtual viewpoint

Claims (5)

an eye information acquisition unit that acquires a fundus information image related to the fundus of the eye to be inspected on the optical axis;
an imaging unit that is provided at a position different from the optical axis and acquires an image of the eye to be inspected;
a control unit for determining the position of the eye to be inspected based on at least two images of the eye to be inspected acquired by the imaging unit;
a display unit that displays the fundus information image under the control of the control unit;
The ophthalmologic apparatus, wherein the control unit acquires a trajectory of movement of characteristic positions in the image of the eye to be examined from the imaging unit. 2. The ophthalmologic apparatus according to claim 1, wherein the control unit causes the display unit to display the image of the subject's eye from the photographing unit together with the fundus information image when acquiring the fundus information image. . When acquiring the fundus information image, the control unit converts the image of the subject's eye into a front image of the subject's eye viewed from a virtual viewpoint in front of the subject's eye, and converts the image of the subject's eye into a front image of the subject's eye viewed from a virtual viewpoint in front of the subject's eye. 2. The ophthalmologic apparatus according to claim 1, wherein is displayed on the display unit. The imaging units are provided in pairs at different positions,
When acquiring the fundus information image, the control unit transmits the image of the eye to be inspected from the photographing unit that acquires the image of the eye to be inspected from the side opposite to the nose with respect to the eye to be inspected, together with the fundus information image. 3. The ophthalmologic apparatus according to claim 1, wherein the display unit displays the information. the eye information acquiring unit and the imaging unit are provided in pairs corresponding to the left and right eyes to be examined, respectively;
The control unit causes the paired eye information acquiring units to simultaneously acquire the fundus information image, and causes the paired photographing unit to simultaneously acquire the images of the eye to be examined, and the fundus information of each of the left and right eyes to be examined. The ophthalmologic apparatus according to any one of claims 1 to 3, wherein an image and the image of the subject's eye are displayed on the display unit.

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