JP7429624B2 - ophthalmology equipment - Google Patents

Description

The present disclosure relates to ophthalmological devices.

Some ophthalmological apparatuses use an eye information acquisition unit to present an optotype to the eye of a subject to acquire eye information. In such an ophthalmological apparatus, if light from the outside enters the eye to be examined or the eye information acquisition unit, it may have an adverse effect on the acquisition of eye information. Therefore, in an ophthalmological apparatus, it has been considered to provide a light shielding unit that covers the subject's head from the eye information acquisition unit in a state where eye information is acquired (see Patent Document 1). This ophthalmological apparatus can prevent light from the outside from entering the eye to be examined or the eye information acquisition unit, and can prevent adverse effects on the acquisition of eye information.

JP2020-81114A

However, in the above-mentioned ophthalmological apparatus, various objects around the eye information acquisition unit are in the field of view of the examined eye, and the examinee is in an environment where it is easy to direct his/her line of sight to things other than the visual target. There is a risk that it may not be acquired properly.

The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide an ophthalmologic apparatus that can make it easier for a subject to concentrate on an optotype.

In order to solve the above-mentioned problems, an ophthalmological apparatus of the present disclosure includes an eye information acquisition section that presents at least an optotype to a subject's eye to acquire eye information, and a shielding member attached to the eye information acquisition section. The shielding member is configured to annularly surround an objective optical member disposed closest to the eye to be examined in the optical system of the eye information acquisition unit in a plane perpendicular to the optical axis of the optical system of the eye information acquisition unit. It is characterized by

According to the ophthalmologic apparatus of the present disclosure, it is possible to make it easier for a subject to concentrate on an optotype.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 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. 2 is an explanatory diagram schematically showing a configuration in which a pair of measurement heads are movable via a drive mechanism in an ophthalmologic apparatus. FIG. 2 is an explanatory diagram showing a schematic configuration of an eye information acquisition unit of the ophthalmologic apparatus. FIG. 2 is a block diagram showing the configuration of a control system of the ophthalmologic apparatus. FIG. 2 is an explanatory diagram showing an ophthalmologic apparatus to which a shielding member is attached. FIG. 2 is an explanatory diagram showing the shielding member, as seen from the front side (the side facing the subject's eye). It is an explanatory view showing a shielding member, and shows a state seen from above in a state where it is attached to an ophthalmological device. FIG. 2 is an explanatory diagram showing an ophthalmologic apparatus to which a shielding member is attached. 9 is an explanatory diagram showing a cross section taken along the line II shown in FIG. 8. FIG. FIG. 7 is an explanatory diagram similar to FIG. 6 showing a shielding member of Example 2 according to the present disclosure. 8 is an explanatory diagram similar to FIG. 7 showing a shielding member of Example 2. FIG. FIG. 7 is an explanatory diagram showing an ophthalmologic apparatus to which a shielding member of Example 2 is attached. 13 is an explanatory diagram showing a cross section taken along the line II-II shown in FIG. 12. FIG.

Below, each example of the ophthalmologic apparatus 10 as an embodiment of the ophthalmologic apparatus according to the present disclosure will be described with reference to FIGS. 1 to 13. Note that FIGS. 1 to 3 show a state in which the shielding member 40 is not attached in order to facilitate understanding of the configuration and content shown in each.

First, the ophthalmologic apparatus 10 without the shielding member 40 attached will be described. As shown in FIG. 1, the ophthalmologic apparatus 10 includes a base 11 installed on the floor, an optometry table 12, a support 13, an arm 14 as a support, a drive mechanism 15, and a pair of measurement heads. 16. This ophthalmological apparatus 10 is designed to be used in a state in which a subject directly facing an optometry table 12 places his/her forehead on a forehead rest 17 provided between both measuring heads 16 (see FIG. 2). etc.). In the following, when viewed from the subject, the left and right direction is the X direction, the up and down direction (vertical direction) is the Y direction, and the direction perpendicular to the X and Y directions (the depth direction of the measurement head 16 (the subject 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, as well as items used for optometry, and is supported by the base 11. . The optometry table 12 may be supported by the base 11 so that its position (height position) in the Y direction can be adjusted.

The support column 13 stands up in the Y direction from the rear end of the optometry table 12, and has an arm 14 provided at the top. The arm 14 suspends a pair of measurement heads 16 on the optometry table 12 via a drive mechanism 15, and extends from the support 13 toward the front in the Z direction. The arm 14 is movable in the Y direction with respect to the support 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. Note that the arm 14 may be movable in the X direction and the Z direction with respect to the support column 13. At the tip of this arm 14, both measurement heads 16 are supported by being suspended by a drive mechanism 15.

The measurement heads 16 are provided in pairs to individually correspond to the left and right eyes E of the subject, and when individually described below, they are used to acquire information about the left eye E of the subject. The measurement head for the left eye 16L is assumed to be a measurement head for the left eye, and the measurement head for the right eye 16R is used to obtain information about the right eye E of the subject. The left eye measurement head 16L and the right eye measurement head 16R are configured to be plane symmetrical with respect to a vertical plane located between them in the X direction.

As shown in FIGS. 2 and 3, each measurement head 16 includes an eye information acquisition section 21 that acquires eye information of the eye E to be examined (individually, a right eye information acquisition section 21R and a left eye information acquisition section 21L) is accommodated. The eye information acquisition unit 21 has an optical system configured using various optical elements, and FIG. 3 shows an objective lens 21a, an image sensor 21b, and an alignment light source 21c as examples of the optical elements. The acquired eye information includes the refractive power of the eye E, an image of the eye E, an image of the fundus of the eye E, a tomographic image of the retina of the eye E, an image of the corneal endothelium of the eye E, The corneal shape of the eye E to be examined, the intraocular pressure of the eye E to be examined, etc. are appropriately combined. Each eye information acquisition unit 21 necessarily includes an optotype presentation mechanism that presents an optotype to the eye E to be examined. The optotype is presented to determine the line of sight direction of the eye E to be examined and to obtain the eye characteristics of the eye E to be examined. Each eye information acquisition unit 21 also includes a refractive power measuring mechanism (a refractometer in the first embodiment) that measures refractive power, a visual acuity test device that performs a visual acuity test while switching the optotype to be presented, and a corrective lens. A phoropter that is switched and arranged to obtain an appropriate corrective refractive power for the eye E, a wavefront sensor that measures the refractive power, a fundus camera that takes an image of the fundus, and an optical tomography device (OCT) that takes a tomographic image of the retina. Coherence Tomography)), a specular microscope that captures images of the corneal endothelium, a keratometer that measures corneal shape, a tonometer that measures intraocular pressure, etc. are combined as appropriate.

Both measurement heads 16 are movably suspended by a drive mechanism 15 via a mounting base section 18 provided at the tip of the arm 14. In the first embodiment, the drive mechanism 15 includes a left vertical drive section 22L, a left horizontal drive section 23L, a left Y-axis rotation drive section 24L, a left X-axis rotation drive section 25L, which correspond to the left eye measurement head 16L, and a left eye measurement head 16L. It has a right vertical drive section 22R, a right horizontal drive section 23R, a right Y-axis rotation drive section 24R, and a right X-axis rotation drive section 25R, which correspond to the measurement head 16R. 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 located between the two in the X direction. Unless specifically mentioned, they will simply be referred to as a vertical drive section 22, a horizontal drive section 23, a Y-axis rotation drive section 24, and an X-axis rotation drive section 25. The drive mechanism 15 is provided in this order from the arm 14 side: a vertical drive section 22, a horizontal drive section 23, a Y-axis rotation drive section 24, and an X-axis rotation drive section 25.

The mounting base part 18 is fixed to the tip of the arm 14 and extends in the X direction.The left drive parts (22L, 23L, 24L, 25L) are suspended from one end, and the right drive parts (22L, 23L, 24L, 25L) are suspended from the other end. Each drive unit (22R, 23R, 24R, 25R) is suspended. Further, a forehead rest part 17 is provided at the center of this mounting base part 18.

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

The Y-axis rotation drive section 24 is provided between the horizontal drive section 23 and the X-axis rotation drive section 25, and controls the X-axis rotation drive section 25 with respect to the horizontal drive section 23 at the eyeball rotation point of the corresponding eye E to be examined. The eyeball is rotated around the Y-axis, which extends in the Y direction through the eye. The X-axis rotation drive unit 25 is provided between the Y-axis rotation drive unit 24 and the corresponding measurement head 16, and the X-axis rotation drive unit 25 rotates the corresponding measurement head 16 to the Y-axis rotation drive unit 24 to rotate the eyeball of the corresponding eye E to be examined. The eyeball is rotated around an X-axis of eye rotation that extends in the X direction through the rotation point. The Y-axis rotation drive unit 24 and the X-axis rotation drive unit 25, for example, have an actuator and a transmission mechanism like the vertical drive unit 22 and the horizontal drive unit 23, and the transmission mechanism receives the driving force from the actuator. is configured to move along an arcuate guide groove. The Y-axis rotation drive unit 24 can rotate the measurement head 16 around the eyeball rotation Y-axis of the eye E by aligning the center position of the guide groove with the eyeball rotation Y-axis. Further, the X-axis rotation drive unit 25 can rotate the measurement head 16 around the eyeball rotation X-axis of the eye E by aligning the center position of the guide groove with the eyeball rotation X-axis. Therefore, in the measurement head 16, the center position of each guide groove of the Y-axis rotation drive section 24 and the X-axis rotation drive section 25 is aligned with the eyeball rotation point of the subject's eye E, so that the eyeball rotation point of the subject's eye E is adjusted. It is possible to rotate in the left-right direction (rotation direction centered on the Y direction) and up-down direction (rotation direction centered on the X direction) around .

Note that the Y-axis rotation drive section 24 supports the measurement head 16 rotatably around the Y-axis rotation axis provided therein, and cooperates with the horizontal drive section 23 to rotate the measurement head 16 via the X-axis rotation drive section 25. The measuring head 16 may be rotated around the eyeball rotation Y-axis of the eye E to be examined by rotating the measuring head 16 while changing the supporting position thereof. Further, the X-axis rotation drive section 25 rotatably supports the measurement head 16 around the X-axis rotation axis provided therein, and also changes the supporting position of the measurement head 16 in cooperation with the vertical drive section 22. By rotating, the measurement head 16 may be rotated around the eyeball rotation X axis of the eye E to be examined.

With the above configuration, the drive mechanism 15 can move each measurement head 16 individually or in conjunction with each other in the X direction, Y direction, and Z direction, and also adjust the eyeball rotation point of the corresponding eye E. It can be rotated up, down, left and right around the center, and each measurement head 16 can be moved to a position (posture) corresponding to the rotation of the corresponding eye E to be examined. By adjusting the position of each measurement head 16, the drive mechanism 15 can make the corresponding eye E to be examined diverge (divergent movement) or converge (convergence movement). Thereby, the ophthalmological apparatus 10 can measure various characteristics of both eyes E by performing a test of divergence motion and convergence motion, and by performing a distance vision test and a near vision test in a binocular viewing state.

Each measurement head 16 is provided with a deflection member 26 that changes the direction of the optical axis L of the eye information acquisition section 21, and an opening 16a ( (see Figure 1 etc.) is provided. This deflection member 26 constitutes the optical system of the eye information acquisition unit 21 together with the objective lens 21a, the image sensor 21b, and the alignment light source 21c, and as shown in FIG. This serves as an objective optical member placed nearby. In the eye information acquisition unit 21, the optical axis L is changed from inside the measurement head 16 to the side of the eye E to be examined by the deflection member 26, and the optotype is presented to the corresponding eye E through the deflection member 26 while passing through the opening 16a. or obtain information about the eye E to be examined. This deflection member 26 is a mirror in the first embodiment. The ophthalmological apparatus 10 adjusts the position of each measuring head 16 so that each deflection member 26 is at a position corresponding to the left and right eyes E of the subject, respectively, so that the subject can open both his/her left and right eyes. (binocular vision state), information on the eye E to be examined can be acquired simultaneously with both eyes. In addition, the ophthalmological apparatus 10 changes the rotational posture of each measurement head 16 around the X-axis of eyeball rotation by the X-axis rotation drive unit 25, so that the corresponding eye E to be examined is viewed downward or upward. Information on optometry E can be obtained. Then, the ophthalmological apparatus 10 changes the rotational posture of each measurement head 16 around the eyeball rotation Y-axis by the Y-axis rotation drive unit 24, so that the corresponding eye E can be viewed from left to right. Information can be obtained.

In addition, each measurement head 16 simultaneously changes its rotational posture symmetrically around the Y-axis of eyeball rotation of the corresponding eye E to be examined, so that the corresponding eye E to be examined is in a state of binocular vision due to divergence or convergence. The direction of the optical axis L of the optical system of the eye information acquisition unit 21 can be changed in accordance with the changing visual axis (direction of line of sight). Therefore, by simultaneously changing the rotational posture of each measurement head 16 symmetrically, the ophthalmological apparatus 10 can present the optotype at a position where the visual axes of both eyes E to be examined are changed so as to cause convergence or divergence. .

The base 11 is provided with a control unit 27 that is housed in a control box and that collectively controls each part of the ophthalmologic apparatus 10 (see FIG. 1). As shown in FIG. 4, the control unit 27 includes each eye information acquisition unit 21 described above and each drive unit (22, 23, 24, 25) as the drive mechanism 15, as well as an examiner controller. 31, a subject controller 32, a storage section 33, and an arm drive mechanism 34 are connected. In the ophthalmological apparatus 10, power is supplied from a commercial power supply to the 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 (binocular information acquisition unit 21). to supply power. The control unit 27 is capable of exchanging information with the drive mechanism 15 and both measurement heads 16 (binocular information acquisition unit 21), controls their operations, and acquires appropriate information from them.

The examiner controller 31 is used by the examiner to operate the ophthalmologic apparatus 10, and is communicably connected to the control unit 27 by short-range wireless communication. Note that the examiner controller 31 only needs to be connected to the control unit 27 via a wired or wireless communication path, and is not limited to the configuration of the first embodiment. As the examiner controller 31 of the first embodiment, a mobile terminal (information processing device) such as a tablet terminal or a smartphone is used. Note that the examiner controller 31 is not limited to a mobile terminal, and may be a notebook personal computer, a desktop personal computer, or the like, or may be configured to be fixed to the ophthalmological apparatus 10, and may be configured to be fixed to the ophthalmological apparatus 10. Not limited to configuration.

The examiner controller 31 includes a display section 35 consisting of a liquid crystal monitor. The display section 35 includes a display surface 35a (see FIG. 1, etc.) on which images and the like are displayed, and a touch panel type input section 35b arranged to overlap the display surface 35a. Under the control of the control unit 27, the examiner controller 31 displays an anterior segment image, a measurement ring image, a fundus image, etc. on the display surface 35a as appropriate based on the image signal from the image sensor 21b of the eye information acquisition unit 21. let Further, the examiner controller 31 is displayed on the input section 35b under the control of the control section 27, and outputs operation information such as alignment instructions and measurement instructions input thereto to the control section 27.

The subject controller 32 is used by the subject to respond when acquiring various eye information of the subject's eye E, and is connected to the control unit 27 via a wired or wireless communication path. . The subject controller 32 is, for example, an input device such as a keyboard, a mouse, or a joystick.

The control unit 27 deploys a program stored in the connected storage unit 33 or built-in internal memory 27a on, for example, a RAM (Random Access Memory), thereby controlling the examiner controller 31 and the examinee controller 32 as appropriate. The operation of the ophthalmologic apparatus 10 is comprehensively controlled according to the operation. In the first embodiment, the internal memory 27a is composed of a RAM or the like, and the storage section 33 is composed of a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable ROM), or the like. In addition to the above-described configuration, 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.

The ophthalmologic apparatus 10 performs autoalignment (automatic positioning) under the control of the control unit 27, and adjusts the position of each eye information acquisition unit 21, that is, each measurement head 16, with respect to each eye E to be examined. Thereafter, the control unit 27 appropriately drives the eye information acquisition unit 21 to acquire various types of eye information about the eye E to be examined while presenting the optotype as appropriate. In the ophthalmological apparatus 10, the eye information acquisition unit 21 is aligned with the eye E to be examined manually, that is, by the examiner operating the examiner controller 31, and the eye information acquisition unit 21 is appropriately presented with an optotype. Various types of eye information about the eye E to be examined can also be acquired. In the ophthalmological apparatus 10, when acquiring various eye information of the eye E to be examined, the examinee can respond by operating the controller 32 for examinee. assist. With this alignment in the XYZ directions, each measurement head 16 has the center position of the guide groove of each of the Y-axis rotation drive unit 24 and the X-axis rotation drive unit 25 aligned with the eyeball rotation point of the eye E to be examined, and the eyeball rotation point is It is rotatable in the left-right direction (rotation direction centered on the Y direction) and up-down direction (rotation direction centered on the X direction). Then, the control unit 27 can acquire the three-dimensional position of the eyeball rotation point of each eye E to be examined based on the position of each measurement head 16 that has been aligned in the XYZ directions.

Next, the shielding member 40 provided in this ophthalmologic apparatus 10 will be explained using FIGS. 5 to 9. As shown in FIG. 5, the shielding member 40 is provided across the left and right pairs of measurement heads 16. The shielding member 40 corresponds to the binocular information acquisition unit 21 provided in each measurement head 16, and surrounds the deflection member 26, which serves as an objective optical member in the optical system of each eye information acquisition unit 21. There is.

The shielding member 40 has a pair of shielding main body parts 41 and a spanning part 42, as shown in FIGS. 6 to 9. The shielding member 40 is entirely formed by a housing 43 made of a flexible material such as a rubber-like substance or a resin material, and in the first embodiment is made of polyurethane. Each shield main body 41 has a substantially triangular shape when viewed from above, individually corresponds to the pair of deflection members 26 (eye information acquisition unit 21), and is located between both measurement heads 16 in the X direction. The structure is symmetrical with respect to the vertical plane. In terms of size (dimensions) in the Y direction, each shield main body part 41 has an upper limit position at the upper end of the forehead rest part 17 and a lower limit position at the lower end of each measuring head 16. In the first embodiment, the upper end The forehead rest 17 is located at an intermediate position, and the lower end thereof is located at an intermediate position between the measuring heads 16.

Each shielding main body 41 has an optical path extending from the eye E to the optical system of the eye information acquisition unit 21 inside, that is, from the eye E to the optical system of the eye information acquisition unit 21 in the measurement head 16 via the deflection member 26. A shielding optical path 44 is formed as an optical path leading to the optical path. Each shielding optical path 44 is formed in a space passing through the corresponding shielding main body 41 (its housing 43), and includes an eye-side opening 45 facing the corresponding eye E and an opening 16a of the corresponding measurement head 16. A head-side opening 46 (see FIG. 9) facing the. In each of the shielding main body parts 41, the deflection members 26 of the corresponding eye information acquisition parts 21 are arranged in the respective shielding optical paths 44 (see FIG. 9). In the optical system of the eye information acquisition unit 21, each shielding optical path 44 has a head-side opening 46 located on the optical axis L extending from inside the measurement head 16 to the deflection member 26, and is reflected by the deflection member 26 to the subject's eye. The eye-side aperture 45 is located on the optical axis L leading to point E. Therefore, each shielding optical path 44 allows the corresponding eye E to look into the deflection member 26 from the eye-side opening 45 (see FIG. 8), and passes through the head-side opening 46 after passing through the deflection member 26. It can reach the optical system of the eye information acquisition section 21 in the measurement head 16 (see FIG. 9).

Each eye-side opening 45 is formed by partially cutting out the front wall portion 43a of the housing 43 of the shielding member 40 (see FIGS. 6 and 8). Therefore, each eye-side opening 45 is surrounded by the front wall portion 43a in a ring shape in a plane perpendicular to the optical axis L of the eye information acquisition unit 21 located inwardly (see FIGS. 6 and 8). .

Each shield main body portion 41 is provided with a mounting flange portion 47 . The mounting flange portion 47 is provided surrounding the head-side opening 46 and has a thin plate shape that can be adapted to the external shape of the corresponding measurement head 16 . For this reason, each head-side opening 46 is annularly surrounded by a mounting flange portion 47 in a plane perpendicular to the optical axis L of the eye information acquisition section 21 located inside. Since the shielding member 40 is made of a flexible material, the mounting flange portion 47 can be bent freely.

The spanning section 42 bridges the pair of shielding main bodies 41 to connect the two shielding main bodies 41. In the first embodiment, the spanning portion 42 has a plurality of expansion and contraction grooves 48 formed in each of the upper wall portion 43b, the lower wall portion 43c (see FIG. 6), and the back wall portion 43d (see FIG. 7) of the housing 43. has been done. Each expansion/contraction groove 48 is a long groove that extends along the direction (Y direction, Z direction) orthogonal to the X direction on the provided wall portion. Since the shielding member 40 is made of a flexible material, the spanning portion 42 can expand and contract the width of each expansion groove 48 like a so-called bellows, and the overall size in the X direction can be changed. Therefore, the span section 42 can change the positional relationship, that is, the interval and relative posture, of the pair of shielding main bodies 41. In addition, the spanning portion 42 does not provide each expansion and contraction groove 48 in the front wall portion 43a, but provides each expansion and contraction groove 48 in the upper wall portion 43b, the lower wall portion 43c, and the back wall portion 43d. The other wall portions (43b, 43c, 43d) can be expanded and contracted without substantially expanding or contracting the front wall portion 43a. Note that each expansion/contraction groove 48 may be provided in the front wall portion 43a, and is not limited to the configuration of the first embodiment.

As shown in FIGS. 5, 8, and 9, this shielding member 40 is attached across both measurement heads 16. Specifically, by deforming each mounting flange portion 47 while contracting the spanning portion 42, the corresponding deflection member 26 is inserted into the shielding body portion 41 from the respective head side opening 46. Thereafter, the head-side opening 46 is made to face the opening 16a of the corresponding measuring head 16 and the opening 16a is surrounded by each mounting flange 47, and each mounting flange 47 is connected to the corresponding measuring head 16 (the outer surface thereof ). This attachment may be performed using an adhesive, an adhesive sheet, magnetic force, or other methods. At this time, in the shielding member 40, both the mounting flanges 47 are deformable, and the span part 42 is extendable and retractable, so that each deflecting member 26 can be moved regardless of the positional relationship between the measuring heads 16. The shielding body 41 can be attached to the measuring head 16 while being housed within a corresponding shielding body 41 . In this manner, the ophthalmologic apparatus 10 allows the shielding member 40 to be attached to and detached from the binocular information acquisition unit 21 , that is, the measurement heads 16 .

Here, the conventional ophthalmological apparatus described in the prior art document is provided with a light shielding unit that covers the subject's head from the eye information acquisition unit, and light from the outside enters the eye to be examined or the eye information acquisition unit. can be suppressed. However, since the light shielding unit allows the examiner to touch the subject from between the light shielding unit and the eye information acquisition unit, the area around the eye information acquisition unit enters the subject's visual field. For this reason, the conventional ophthalmological apparatus is set up in an environment in which the examinee tends to direct his/her line of sight to something other than the optotype, and there is a possibility that eye information cannot be appropriately acquired.

On the other hand, in the ophthalmological apparatus 10 of the present disclosure, as shown in FIG. The deflection member 26 is surrounded by the shield main body 41 (its front wall portion 43a). Here, in the ophthalmological apparatus 10, each eye information acquisition section 21 passes the corresponding head-side opening 46, deflection member 26, and eye-side opening 45 to be examined, so that the ophthalmological apparatus 10 allows the eye information to pass through the corresponding head-side opening 46, deflection member 26, and eye-side opening 45. Visual targets can be presented to both eyes E of the examiner to be examined, and eye information of both eyes E to be examined can be acquired. For this reason, the ophthalmological apparatus 10 can block anything that may catch the eye of the subject around the deflection member 26, that is, block the subject's field of view, and the eye information can be transmitted through the deflection member 26, that is, through it. It is possible to concentrate on the optotype presented by the acquisition unit 21. Thereby, the ophthalmological apparatus 10 can appropriately acquire eye information of each eye E to be examined, and can also reduce wasted time such as directing one's line of sight to another, thereby shortening the examination time and suppressing the burden on the examinee.

In addition, since the ophthalmological apparatus 10 has each deflection member 26 disposed within the shielding optical path 44 formed inside the shielding member 40, the optotypes presented by each eye information acquisition section 21 are directed to the darkness within the shielding optical path 44. It can be made to look like it is drawn inside. Therefore, the ophthalmological apparatus 10 can guide the line of sight to look at the deflection member 26 in the shielding optical path 44 from the eye-side opening 45, and the optotype presented by the deflection member 26, that is, the eye information acquisition unit 21, You can definitely concentrate. In particular, the ophthalmic apparatus 10 sets the range of the size (dimensions) of each shielding body 41 in the Y direction with the upper limit position being the upper end position of the forehead rest part 17 and the lower limit position being the lower end position of each measuring head 16. Therefore, the field of view of the subject can be more reliably blocked while suppressing interference with the operation of each measurement head 16.

Furthermore, the ophthalmologic apparatus 10 allows the shielding member 40 to be attached to and detached from the binocular information acquisition unit 21 , that is, the measurement heads 16 . Therefore, the ophthalmological apparatus 10 can select whether or not to use the shielding member 40 as appropriate depending on the type of examination, the examiner's preference, the examinee's preference and aptitude, etc., so that each examinee's eye E Eye information can be obtained. In particular, in the ophthalmologic apparatus 10, the shielding member 40 is made of a flexible material and the spanning section 42 is extendable and retractable, so that it can be easily attached to and detached from both measurement heads 16 (binocular information acquisition section 21). .

The ophthalmological apparatus 10 has each shielding member 40 configured to allow the deflection member 26 to be viewed through the eye-side opening 45 to be examined, and the opening 16a of the measurement head 16 to be surrounded by the mounting flange 47 and to face the head-side opening 46. There is. Therefore, the ophthalmological apparatus 10 can suppress external light from entering the optical system of each eye E and each eye information acquisition unit 21, and the external light has an adverse effect on the acquisition of eye information. can be suppressed.

The ophthalmologic apparatus 10 of Example 1 of the ophthalmologic apparatus according to the present disclosure can obtain the following effects.

In the ophthalmological apparatus 10, the shielding member 40 annularly surrounds the objective optical member (deflection member 26 in the first embodiment) of the optical system of the eye information acquisition unit 21 in a plane perpendicular to the optical axis L of the optical system. . For this reason, the ophthalmological apparatus 10 is able to block anything that may catch the eye of the subject around the deflection member 26, that is, to block the subject's field of view, and the eye information acquisition unit 21 uses the objective optical member It is possible to concentrate on the visual target presented on the screen.

In the ophthalmologic apparatus 10, the shielding member 40 is detachable from the eye information acquisition section 21 (the measurement head 16 in which the shielding member 40 is housed). Therefore, the ophthalmological apparatus 10 can select whether or not to use the shielding member 40 according to the type of examination, the examiner's preference, the examinee's preference and aptitude, etc. The eye information of each eye E to be examined can be smoothly acquired.

In the ophthalmological apparatus 10, the eye information acquisition sections 21 are provided in pairs corresponding to both eyes E of the subject, and the shielding members 40 correspond to the respective eye information acquisition sections 21 and The two eye information acquisition units 21 are integrated and provided over each other. Therefore, the ophthalmological apparatus 10 can more reliably block the field of view of each eye E, and can concentrate on the optotype presented to the objective optical member by each eye information acquisition unit 21. Further, in the ophthalmological apparatus 10, when the shielding member 40 is made removable as in the first embodiment, since it is integrated, management etc. when removed can be facilitated.

In the ophthalmological apparatus 10, the shielding member 40 includes a pair of shielding body parts 41 attached to the respective eye information acquisition parts 21 (measuring heads 16), and a spanning part 42 that bridges them. The positional relationship between the pair of shield main bodies 41 can be changed. Therefore, the ophthalmological apparatus 10 can appropriately respond to the positional relationship and relative movement of both measuring heads 16 that change due to alignment and convergence movements of the subject's eyes E, and the positional relationship. It is possible to obtain the effect of blocking the visual field of each eye E regardless of relative movement.

In the ophthalmological apparatus 10, the shielding member 40 has a shielding optical path 44 extending from the eye E to the optical system of the eye information acquisition unit 21, and an objective optical member (deflection member 26) is disposed within the shielding optical path 44. Therefore, the ophthalmological apparatus 10 can make the optotypes presented by each eye information acquisition unit 21 appear as if they are drawn in the darkness within the shielding optical path 44, and direct the line of sight to look at the deflection member 26. This allows the subject to concentrate more on the visual target.

Therefore, in the ophthalmologic apparatus 10 as an example of the ophthalmologic apparatus according to the present disclosure, it is possible to make it easier for the subject to concentrate on the optotype.

In addition, in the ophthalmological apparatus 10 of Example 1, the shielding member 40 can be attached to and detached from the eye information acquisition section 21 (both measurement heads 16). However, if the shielding member 40 annularly surrounds the objective optical member (deflection member 26 in the first embodiment) of the optical system of the eye information acquisition unit 21 in a plane perpendicular to the optical axis L of the optical system, It may be fixed to the binocular information acquisition unit 21 (both measuring heads 16) as in a second embodiment described later, and the configuration is not limited to the first embodiment.

Next, an ophthalmologic apparatus 10A of Example 2, which is an embodiment of the present disclosure, will be described using FIGS. 10 to 13. In the ophthalmological apparatus 10A (see FIG. 12), the shielding member 40 attached to the ophthalmic apparatus 10 of Example 1 is replaced with a shielding member 40A. The basic concept and configuration of the ophthalmologic apparatus 10A are the same as those of the ophthalmologic apparatus 10 of Example 1, so parts with the same configuration are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 10 to 13, the shielding members 40A of the second embodiment individually correspond to the deflection members 26 (eye information acquisition unit 21) forming a pair, and are considered to form a pair. The shielding member 40A is entirely formed of a casing 43A made of a flexible material such as a rubber-like substance or a resin material, like the shielding member 40 of the first embodiment, and is made of polyurethane like the first embodiment. It is formed of. In each shielding member 40A, a shielding optical path 44A, which is an optical path from the eye E to the optical system of the eye information acquisition unit 21, is formed inside the housing 43A. This shielding optical path 44A has an eye-side opening 45A facing the corresponding eye E, and a head-side opening 46A facing the opening 16a of the corresponding measurement head 16. In each shielded optical path 44A, the deflection member 26 of the corresponding eye information acquisition unit 21 is arranged within the shielded optical path 44A (see FIG. 13). Each of these shielding optical paths 44A allows the corresponding eye E to look into the deflection member 26 through the eye-side opening 45A (see FIG. 12), and after passing through the deflection member 26, the head-side opening 46A. The optical system can then be delivered to the optical system of the eye information acquisition section 21 in the measurement head 16.

Each eye-side opening 45A is formed by partially cutting out the front wall portion 43aA of the housing 43A of the shielding member 40A (see FIGS. 10 and 12). For this reason, each eye-side opening 45A to be examined is annularly surrounded by the front wall portion 43aA in a plane perpendicular to the optical axis L of the eye information acquisition unit 21 located inwardly (see FIGS. 10 and 12). .

Each shielding member 40A is provided with a mounting flange portion 47A and a hook flange portion 47B. The mounting flange portion 47A has a thin plate shape that can be adapted to the external shape of the corresponding measuring head 16, and surrounds the head side opening 46A. The hook flange portion 47B has a thin plate shape that can be applied to the inner edge of the opening 16a of the corresponding measurement head 16, and surrounds the head side opening 46A. The attachment flange portion 47A and the hook flange portion 47B sandwich the opening edge of the opening portion 16a, thereby allowing attachment to the opening portion 16a, that is, the measurement head 16 (see FIG. 13). For this reason, each head-side opening 46A is annularly surrounded by a mounting flange portion 47A and a hook flange portion 47B in a plane perpendicular to the optical axis L of the eye information acquisition unit 21 located inside. The mounting flange portion 47A and the hooking flange portion 47B can be bent freely since the shielding member 40A is made of a flexible material.

Moreover, each shielding member 40A is provided with a shielding rib 49, as shown in FIGS. 10 and 11. This shielding rib 49 extends from the housing 43A along a plane orthogonal to the optical axis L passing through the eye-side opening 45A at a position excluding the surface where the head-side opening 46A is provided when viewed from the eye-side opening 45A side. It is protruded from. That is, the shielding rib 49 protrudes outward from each of the upper wall portion 43bA, the lower wall portion 43cA, and the side wall portion 43eA of the housing 43A. The shielding ribs 49 are designed to make each shielding member 40A larger when viewed from the eye-side opening 45A side, that is, to widen the range that blocks the visual field of the eye E facing the eye-side opening 45A. (See Figure 10). Further, the shielding rib 49 is sized so as not to interfere with the shielding member 40A attached to the opposite side when both shielding members 40A are attached to the corresponding measurement heads 16 (see FIG. 12). In the size (dimension) of each shielding member 40A in the Y direction including the shielding rib 49, the upper limit position is the upper end position of the forehead rest part 17, and the lower limit position is the lower end position of each measuring head 16. In Example 2, the upper end is located at the middle of the forehead rests 17, and the lower end is located at the middle of the measuring heads 16.

Each shielding member 40A has a symmetrical shape with respect to a plane including the optical axes L before and after being reflected by the deflecting member 26. Therefore, when the right (left) shielding member 40A is rotated 180 degrees around a line extending in the Z direction, each shielding member 40A has the same shape as the left (right) one. For this reason, each shielding member 40A can be attached to either the left or right measuring head 16.

This shielding member 40A is attached to each of the pair of measurement heads 16, as shown in FIGS. 12 and 13. Specifically, the corresponding deflecting member 26 is placed in the shielding optical path 44 from the head-side opening 46A, the hook flange portion 47B is deformed and inserted into the opening 16a of the corresponding measuring head 16, and the hook flange portion 47B is inserted into the opening 16a of the corresponding measuring head 16. It is fixed to the corresponding measurement head 16 by sandwiching the opening edge of the opening 16a between the portion 47B and the mounting flange portion 47A. Note that each shielding member 40A may be attached to each measurement head 16 in the above state when each measurement head 16 is assembled, and is not limited to the configuration of the first embodiment.

In this ophthalmological apparatus 10A, each eye information acquisition unit 21 allows the subject to pass through the corresponding head side opening 46A, deflection member 26, and subject eye side opening 45A, as in the case where the shielding member 40A is not provided. It is possible to present optotypes to both eyes E to be examined, and to obtain eye information for both eyes E to be examined. Here, from the subject's perspective (both eyes E to be examined), as shown in FIG. It is surrounded by a front wall portion 43aA of 40A. For this reason, the ophthalmological apparatus 10A can block anything that might catch the eye of the subject around the deflection member 26, that is, block the subject's field of view, and the eye information can be transmitted through the deflection member 26, that is, through it. It is possible to concentrate on the optotype presented by the acquisition unit 21. Thereby, the ophthalmological apparatus 10A can appropriately acquire the eye information of each eye E to be examined, and also reduce the examination time and reduce the burden on the examinee by reducing wasted time due to directing the eye elsewhere.

The ophthalmologic apparatus 10A of Example 2 of the ophthalmologic apparatus according to the present disclosure can obtain the following effects. Since this ophthalmologic apparatus 10A has basically the same configuration as the ophthalmologic apparatus 10 of the first embodiment, the same effects as those of the first embodiment can be obtained.

In addition, the ophthalmological apparatus 10A has a shielding member 40A fixed to the eye information acquisition section 21 (the measurement head 16 in which it is housed). Therefore, the ophthalmological apparatus 10A can make the positional relationship of the shielding member 40A with respect to the deflection member 26, that is, the eye information acquisition unit 21 more appropriate, and the eye information acquisition unit 21 can more appropriately acquire the eye information of each eye E. It can be made into something.

Further, in the ophthalmological apparatus 10A, the eye information acquisition sections 21 are provided in pairs corresponding to both eyes E of the subject, and the shielding member 40A is provided individually corresponding to each eye information acquisition section 21. They are provided in pairs. Therefore, the ophthalmological apparatus 10A can more reliably block the visual field of each eye E while reducing the size of each shielding member 40A. In addition, since the ophthalmological apparatus 10A has the shielding members 40A independent of each other, the shielding members 40A do not interfere with the alignment or convergence of each measurement head 16 for both eyes E of the subject. It is possible to obtain the effect of blocking the field of view of each eye E while preventing this.

Further, in the ophthalmological apparatus 10A, the deflecting member 26 as an objective optical member is a mirror, and the shielding member 40A has a symmetrical shape with respect to a plane including the optical axis L before and after being reflected by the mirror (deflecting member 26). . Therefore, in the ophthalmologic apparatus 10A, each shielding member 40A can be attached to either the left or right measuring head 16, and it is possible to eliminate the need to manage the left and right separately and to avoid mistakes between the left and right at the time of attachment.

The ophthalmologic apparatus 10A includes a shielding rib 49 that protrudes in a direction perpendicular to the optical axis L on the shielding member 40A. Therefore, the ophthalmologic apparatus 10A can expand the range in which the visual field of the subject's eye E is blocked, reduce the amount of material used, and reduce the weight of each shielding member 40A. In particular, in the ophthalmological apparatus 10A, when the shielding members 40A are attached to the left and right eye information acquisition sections 21 (measuring heads 16), the shielding ribs 49 are prevented from interfering with each other. The visual field of each eye E can be more effectively blocked while preventing the movement of the eye E from being obstructed.

Therefore, in the ophthalmologic apparatus 10A as an example of the ophthalmologic apparatus according to the present disclosure, it is possible to make it easier for the subject to concentrate on the optotype.

In addition, in the ophthalmological apparatus 10A of Example 2, the shielding member 40A is fixed to the eye information acquisition section 21 (both measuring heads 16). However, if the shielding member 40A surrounds the objective optical member (deflection member 26 in the second embodiment) of the optical system of the eye information acquisition unit 21 in a ring shape in a plane perpendicular to the optical axis L of the optical system, As in the first embodiment, it may be possible to attach and detach the binocular information acquisition unit 21 (both measurement heads 16), and the configuration is not limited to the second embodiment.

Although the ophthalmic apparatus of the present disclosure has been described above based on each example, the specific configuration is not limited to each example and does not depart from the gist of the invention according to each claim. Changes and additions to the design are permitted as long as possible.

For example, in each embodiment, the eye information acquisition unit 21 having the above-described configuration is used. However, the ophthalmologic apparatus of the present disclosure can be applied as long as it includes an eye information acquisition unit that presents an optotype to the eye E, and is not limited to the configuration of each embodiment.

Furthermore, in each embodiment, the eye information acquisition units 21 are provided in pairs, making it possible to acquire eye information in a binocular viewing state. However, the ophthalmological apparatus of the present disclosure may be provided with a single eye information acquisition unit 21, that is, may be capable of acquiring eye information in a monocular viewing state, and is not limited to the configuration of each embodiment. .

Further, in each embodiment, the deflection member 26 is annularly surrounded as an objective optical member of the optical system of the eye information acquisition unit 21. However, in the ophthalmological apparatus of the present disclosure, the objective optical member may be an objective lens as long as it annularly surrounds the objective optical member disposed closest to the eye E in the optical system of the eye information acquisition unit 21, Other optical members may be used, and the structure is not limited to each embodiment. Here, when the objective optical member is an objective lens, the optical system of the eye information acquisition unit 21 may be located on a straight line from the eye E to the objective lens; The objective lens may be arranged in an annular manner along a plane perpendicular to the straight line.

10, 10A Ophthalmological apparatus 21 Eye information acquisition unit 26 Deflection member (as an example of objective optical member) 40, 40A Shielding member 41 Shielding main body 42 Bridge portion 44, 44A Shielding optical path 49 Shielding rib E Eye to be examined L Optical axis

Claims (7)

an eye information acquisition unit that presents at least an optotype to the eye to be examined and acquires eye information;
A shielding member attached to the eye information acquisition unit,
The shielding member annularly surrounds an objective optical member disposed closest to the eye to be examined in the optical system of the eye information acquisition unit in a plane perpendicular to the optical axis of the optical system of the eye information acquisition unit. ,
The eye information acquisition units are provided in pairs corresponding to both eyes of the subject,
The shielding members are provided in pairs corresponding to each of the eye information acquisition units,
The objective optical member is a mirror,
The ophthalmologic apparatus is characterized in that the shielding member has a symmetrical shape with respect to a plane including the optical axis before and after the optical axis reflected by the mirror . The ophthalmologic apparatus according to claim 1, wherein the shielding member is fixed to the eye information acquisition section. The ophthalmologic apparatus according to claim 1, wherein the shielding member is detachable from the eye information acquisition unit. The eye information acquisition units are provided in pairs corresponding to both eyes of the subject,
Any one of claims 1 to 3, characterized in that the shielding member is provided so as to correspond to each of the eye information acquisition units and to bridge the two eye information acquisition units and to be integrated. The ophthalmological device according to item 1. The shielding member has a pair of shielding body parts attached to each of the eye information acquisition parts, and a spanning part that bridges the pair of shielding body parts,
The ophthalmologic apparatus according to claim 4 , wherein the spanning section allows a change in the positional relationship between the pair of shielding main body sections . The shielding member has a shielding optical path extending from the eye to be examined to an optical system of the eye information acquisition unit, and the objective optical member is disposed within the shielding optical path . 5. The ophthalmological device according to any one of items 5 to 5 . The ophthalmologic apparatus according to claim 6 , wherein the shielding member is provided with a shielding rib that projects in a direction perpendicular to the optical axis .