JP2021023542A - Ophthalmologic apparatus - Google Patents

Abstract

To provide an ophthalmologic apparatus comprising a frame to be put on a user's face, where a sufficient space can be secured between the face and the apparatus or a larger number of optical systems are easy to dispose in the frame.SOLUTION: An ophthalmologic apparatus comprises a frame 100a to be put on a user's face. The frame 100a includes: an irradiation optical system 110 comprising at least an objective mirror 117 that reflects light to guide the light onto a retina of a user's eye; and a second optical system 120, 130 on the transmission side of the objective mirror 117, the second optical system performing light projection or light reception through the objective mirror 117. The described configuration makes it easy to secure a sufficient space between the face and the apparatus or to dispose a larger number of optical systems in the frame.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to an ophthalmic apparatus that irradiates a user's eye with light.

In recent years, in the field of ophthalmology, a head-mounted device in which a housing is worn on the user's face has attracted attention.

For example, Patent Document 1 describes a mirror arranged near the eye, an optical scanner arranged on the reflection side of the mirror, and an optical scanner which is provided in a housing and irradiates the retina with light through the mirror. Discloses a device that scans light on the retina.

JP-A-2018-47044

In the above configuration, it is difficult to secure a space between the face and the device because the light is turned back on the reflection side.

In addition, when a device having the above configuration is used for an ophthalmic examination, the eyelid opening may be assisted by a finger or an eyelid opener at the time of the examination. Attempting to secure space for eyelid opening (the space for the eyelid opener and fingers to be inserted) further reduces the space between the face and the device.

Therefore, in a head-mounted device in which a mirror for guiding light to the retina is arranged near the eye, it is difficult to arrange another optical system in the housing, and as a result, the function of the device is limited. It becomes easy to put it away.

The technical subject of the present disclosure is to provide an ophthalmic apparatus that solves at least one of the problems of the prior art.

The ophthalmic apparatus according to the first aspect of the present disclosure is an ophthalmic apparatus including a housing worn on the user's face, and the housing reflects the light to transmit the light to the retina of the user's eye. An irradiation optical system including at least an objective mirror for guiding light upward, and a second optical system that transmits light through the objective mirror to perform either light projection or light reception on the transmission side of the objective mirror. ..

According to the present disclosure, in an ophthalmologic device provided with a housing worn on the user's face, it is easy to secure a sufficient space between the face and the device, or it is easy to arrange more optical systems in the housing. ..

It is a figure which showed the whole structure of the eye examination apparatus which concerns on embodiment. It is a figure which showed the optical structure of the eye examination apparatus which concerns on embodiment. It is a figure for demonstrating the component concerning the alignment adjustment in the eye examination apparatus which concerns on embodiment. It is a figure for demonstrating an example of the alignment adjustment method using tilt adjustment. It is a figure for demonstrating an example of the alignment adjustment method which used both tilt adjustment and shift adjustment. It is a figure for demonstrating another example of the alignment adjustment method which used both tilt adjustment and shift adjustment. It is a figure for demonstrating an example of various configurations appearing in the appearance of the housing in an eye examination apparatus.

Hereinafter, the present disclosure will be described based on an embodiment with reference to the drawings. Some or all of the components in each embodiment may be appropriately applied to other embodiments.

The ophthalmic device of the present disclosure is a head-mounted device having a housing worn on the user's face. The ophthalmic device may be an eye examination device that examines the eye. Hereinafter, a user who receives light from an eye examination device will be referred to as a subject. The eye of the subject is hereinafter referred to as the eye to be inspected. The examination by the eye examination device may be a subjective examination or an objective examination. Further, the eye examination device may be, for example, a device for inspecting the structure of the eye to be inspected or a device for inspecting the function. The device for inspecting the function may be, for example, a device for inspecting the refraction function or the like, or a visual function (retinal function) inspection device such as a perimeter. The device for inspecting the structure may be a photographing device. In addition, examples of ophthalmic devices other than the eye examination device include devices that assist the user's visual recognition by projecting an external image or the like onto the retina.

An embodiment will be described below based on the eye examination apparatus 1 shown in FIGS. 1 to 7. The eye examination device 500 (hereinafter referred to as the device 500) is shown as an example of the embodiment of the ophthalmic device according to the present disclosure. In the following description, it is assumed that the apparatus 500 is a fundus photography apparatus used for fundus examination as an example. The fundus imaging device may be a device that captures a frontal image of the fundus, or may be a device that captures a tomographic image of the fundus.

Further, in the description of each figure, the Z direction is the working distance direction, the X direction is the left-right direction, and the Y direction is the up-down direction.

<Overall configuration>
The apparatus 500 includes a first optical unit 100, a second optical unit 200, and a control unit 300. As shown in FIG. 1, the first optical unit 100 has a head-mounted type housing 100a (see FIG. 3) and is worn on the face of a subject. The first optical unit 100 is provided with at least an objective mirror 117 and an optical scanner 115 (see FIG. 2). A part of the optical device constituting the fundus photography optical system is arranged in the second optical unit 200. The fundus photography optical system according to the present embodiment may be, for example, an SLO (scanning light ophthalmoscope) optical system or an OCT optical system. In particular, in the case of the OCT optical system, the illumination light is referred to as measurement light. Further, in the OCT optical system, the light from the light source is divided into the reference light and the measurement light, and a tomographic image of the fundus of the eye to be inspected is generated based on the spectral interference signal by the reference light and the return light of the measurement light. To.

The control unit 300 controls the control of the device 500. Further, the control program of each of the optical units 100 and 200 may be stored in the built-in storage device of the control unit 300. As an example, as shown in FIG. 7, the control unit 300 may be a general-purpose PC. Further, the present device 500 may operate based on the operation to various input interfaces provided in the PC. Further, the apparatus 500 may include a monitor 90. For example, an anterior segment observation image is displayed on the monitor 90. Alignment is possible based on the anterior segment observation image. Further, the monitor 90 may display the inspection result (photographing result and measurement result) by the present device 500. The monitor 90 may be, for example, a touch panel or may also serve as an input interface. In FIG. 1, a PC monitor is exemplified as a monitor 90.

In the present embodiment, the optical system is dispersedly arranged in the first optical unit 100 and the second optical unit 200, but the present invention is not limited to this, and the optical system may be centrally arranged in one unit. Further, the control unit 300 may also be integrated with other units.

<Detailed configuration of the first optical unit and the second optical unit>
The detailed configuration of the first optical unit 100 and the second optical unit 200 will be described with reference to FIGS. 2 and 3. 2 and 3 show a view of the first optical unit 100 mounted on the face of the subject as viewed from above. In the present embodiment, the fundus photography optical system is formed by the optical devices included in both the first optical unit 100 and the second optical unit 200. The first optical unit 100 and the second optical unit 200 are connected by an optical fiber.

<Optical system of the first optical unit>
The optical system of the first optical unit 100 will be described with reference to FIG. The first optical unit 100 includes an optical system (irradiation optical system 110 in the present embodiment) that is independent of each of the left and right eyes. In the example of FIG. 2, as an example, each optical system is arranged symmetrically.

In FIG. 2, the irradiation optical system for the right eye and the irradiation optical system for the left eye have one of the following optical devices. That is, each optical system may have at least an objective mirror 117. In addition, each optical system further includes a fiber exit end 114 and an optical scanner 115. The fiber emitting end 114 serves as a light emitting position in the housing 101a. Light from the light source 201 arranged in the second optical unit 200 is emitted from the fiber emission end 114.

The optical scanner 115 may be a device with two degrees of freedom (that is, capable of scanning light in two dimensions). In this case, the optical scanner 115 may be a MEMS mirror. Further, the optical scanner 115 may be a combination of two devices with one degree of freedom (optical scanners) having different scanning directions.

The objective mirror 117 is used to guide light to the retina of the eye to be inspected. The objective mirror 117 is formed by a quadric surface or a high-order aspherical surface based on the quadric surface. For example, an elliptical mirror may be used as the objective mirror 117. When one of the two focal points in the elliptical mirror is aligned with the optical scanner 115, the pupil P of the optical system (irradiation optical system and fundus photography optical system) is formed at the other focal point. By adjusting the alignment so that the pupil P coincides with the pupil, the light from the irradiation optical system 110 is irradiated to the retina without the light being eclipsed by the iris.

The optical axis L shown in FIG. 2 passes substantially the center of the fundus photography optical system 110. The optical axis L may be a reference fixed-line optical axis. However, the drive range of the optical scanner 115 may be changed between each shooting. Therefore, the region through which the light passes from the optical scanner 115 to the fundus may be changed for each shooting according to the driving range of the optical scanner 115. That is, the optical scanner 15 may correct the displacement of the irradiation position of the illumination light on the fundus due to the tilt adjustment described later by deflecting the illumination light.

In the present embodiment, the return light from the eye E to be inspected (for example, the fundus reflected light) follows the path at the time of irradiation in the reverse direction and is incident on the fiber exit end 114.

In this embodiment, the objective mirror 117 may be a beam splitter. As a result, for example, another optical system can be arranged on the transmission side of the objective mirror 117 (beam splitter) when viewed from the eye E to be inspected, so that light can be transmitted and received between the other optical system and the eye E to be inspected. Become.

Here, in the first optical unit 100, since the light is turned back on the reflection side of the objective mirror 117, it is difficult to secure a space between the face and the device. Further, when trying to secure a space for opening the eyelid (a space for inserting the eyelid opening device and the finger), there is no more space between the face and the device. Therefore, conventionally, it has been difficult to arrange a space for arranging other optical systems between the objective mirror 117 and the light source (here, the fiber emission end 114).

On the other hand, in the present embodiment, since the objective mirror 117 is a beam splitter, another optical system can be arranged in the space on the transmission side of the objective mirror 117. Further, as compared with the case where another optical system is arranged on the reflection side of the objective mirror 117, the objective mirror 117 can be easily enlarged, and as a result, light can be easily irradiated to a wider area on the retina.

In the following description, the objective mirror 117 will be described as being a half mirror. However, the present invention is not limited to this, and the objective mirror 117 may be another beam splitter that performs light separation by wavelength, angle of incidence, or polarization.

As another optical system, in the first embodiment, the optometry optical system 120 and the anterior segment observation optical system 125 are provided. One of these optical systems may be provided for each of the left and right eyes.

<Optometry optical system>
The fixation optical system 120 projects an fixation target for guiding (that is, fixation) the line-of-sight direction of the eye E to be examined. The fixation target may be projected along the optical axis L, for example. The optometry optical system 120 may be, for example, a point light source that emits visible light. In the present embodiment, the fixation target is projected along the Z direction.

<Anterior segment observation optical system>
The anterior segment observation optical system 125 is used to acquire an anterior segment observation image. The anterior segment observation image is used for various adjustments such as alignment. The anterior segment observation image may be displayed on a monitor of a PC used as the control unit 300, for example. The anterior segment observation optical system 125 may include, for example, a light receiving element for receiving at least the reflected light from the anterior segment. Further, the anterior segment observation optical system 125 may have an anterior segment illumination. In this case, the anterior segment illumination is arranged on the transmission side of the objective mirror 117, but is not necessarily limited to this. For example, the anterior segment illumination may be arranged on the reflection side of the objective mirror 117. That is, only a part of the anterior segment observation optical system 125 may be arranged on the transmission side of the objective mirror 117. Further, the anterior segment illumination may be an index projection optical system that projects an alignment index onto the cornea.

In the example of FIG. 2, the anterior segment observation optical system 125 photographs the anterior segment from an oblique direction with respect to the fixation optical axis (here, the optical axis L). However, the present invention is not limited to this, and the optical axis of the anterior segment observation optical system 125 may coincide with the fixation optical axis.

<Second optical unit>
The second optical unit 200 includes at least a light source 201 and a light receiving element (detector) 209. Further, as shown in FIG. 2, the second optical unit 200 may include a beam splitter 202 and an optical branching device 203.

In FIG. 2, the light from the light source 201 passes through the beam splitter 202 and is guided to the optical branching device 203.

The optical branching device 203 selectively connects the optical path of the second optical unit 200 to the right eye optical system and the left eye optical system of the first optical unit 100 based on the control signal. That is, the light source 201 and the light receiving element 209 are also used between the right eye optical system and the left eye optical system. For the optical branching device 203, for example, an optical switch may be used. In this case, it may be a MEMS switch or a mechanical switch. The optical branching device 203 may switch the optical path for each frame of scanning. Further, the optical branching device 203 may be controlled to switch the optical path for each scan of N scanning lines (1 ≦ N <Nmax, Nmax ... the number of scanning lines constituting one frame). In this case, since the right eye and the left eye can be irradiated with light substantially at the same time, the examination of the right eye and the left eye may be performed substantially at the same time by the apparatus 500.

The return light from the eye E to be inspected incident on the fiber exit end 114 is guided to the light receiving element 209. The apparatus 500 acquires a fundus image based on the received signal.

<Configuration related to alignment adjustment>
Next, with reference to FIG. 3, the components related to the alignment adjustment included in the first optical unit 100 will be described.

As shown in FIG. 3, the first optical unit 100 includes a fulcrum portion 130 and an adjusting mechanism 140.

The fulcrum portion 130 is formed so as to project toward the face side of the eye E to be inspected at a position away from the optical axis L. One end of the fulcrum portion 130 is fixed to the housing 100a. In the present embodiment, the fulcrum portion 130 is a member in the shape of a nose pad of eyeglasses, and contacts the subject via a pad 135 which is a part of the fulcrum portion 130. The pad 135 is swingably attached. Further, the fulcrum portion 130 may be detachable from the housing 100a.

The fulcrum portion 130 is used to tilt the optical axis L around the contact position in a state of being in contact with the face of the subject. In the example shown in FIG. 3, as a fulcrum portion, one point away from the optical axis L projects toward the face side of the eye E to be inspected and comes into contact with one point around the eye E to be inspected. This allows tilt adjustment with two degrees of freedom around the contact position (that is, it can turn in two different directions). However, the fulcrum portion is not limited to the one that enables tilt adjustment with two degrees of freedom. For example, the fulcrum portion may be capable of tilt adjustment with one degree of freedom. In this case, the fulcrum portion may be projected at two locations away from the optical axis L toward the face side of the eye E to be inspected, or may be projected linearly connecting the two locations. When such a fulcrum portion comes into contact with two points (or a straight line connecting the two points) around the eye E to be inspected, the tilt of the optical axis L can be adjusted with the straight line connecting the two points as an axis.

In the present embodiment, the fulcrum portion 130 is attached to the face of the subject (here, the nose N) by wearing the head mount type (here, glasses type) housing 100a on the face of the subject. Contact. However, the fulcrum portion 130 does not necessarily have to be formed in the shape of a nose pad. For example, the fulcrum portion 130 may be formed as a member that comes into contact with either the eyebrows or the cheekbones when the housing 100a is worn.

Similar to the first embodiment, the fulcrum portion 130 is used to tilt the optical axis L around the contact position in a state of being in contact with the face of the subject. In the present embodiment, the irradiation optical system 110 (here, the fiber exit end 114, the optical scanner 115, and the objective mirror 117) can be integrally tilted around the fulcrum portion 130. In this embodiment, the drive mechanism 150 may be further provided. The drive mechanism 150 may change the tilt amount in the irradiation optical system 110 based on the control signal.

However, it is not always necessary that the irradiation optical system 110 is integrally tilted, and only a part of the irradiation optical system 110 may be formed so as to be tiltable.

Further, in the present embodiment, the other optical system may be movable integrally with the irradiation optical system 110 (in the present embodiment, tilt movement and shift movement are possible). As an example, in the following description, it is assumed that the optometry optical system 120 is integrally movable (tilt movement and shift movement are possible) with the irradiation optical system 110 unless otherwise specified. Further, it is assumed that the anterior segment observation optical system 125 is fixedly arranged with respect to the housing 100a.

<Shift mechanism>
As shown in FIG. 3, the present device 500 may include an adjustment mechanism 140 (also referred to as a shift mechanism). The adjusting mechanism 140 is driven to shift the position of the optical axis L with respect to the protrusion 130 in a direction orthogonal to the optical axis L. Here, the adjustment mechanism 140 moves the irradiation optical system 110 in the X and Y directions. Here, in the present device 500, since the distance between the objective mirror 117 and the eye E to be inspected is short, precise adjustment is required. Therefore, for example, the adjusting mechanism 140 may be a mechanism for moving the irradiation optical system 110 by a feed screw.

In the present embodiment, the shift movement by the adjustment mechanism 140 is driven independently of the tilt movement.

<Alignment adjustment method>
Also in the present embodiment, the alignment adjustment can be performed by the same method as in the first embodiment by combining the tilt adjustment around the fulcrum portion 130 and the shift adjustment by the adjustment mechanism 140 (FIGS. 4 to 6). reference).

Next, the alignment adjustment method in the apparatus 500 will be described. Since this device 500 is a fundus photography device, as shown in FIGS. 4 to 6, it has a conical shape with the optical axis L as the central axis, and one point in the luminous flux from the objective mirror 117 (FIGS. 4 to 6). (Indicated by the chain line) is emitted with scanning. The position of the apex of the cone is the pupil position (indicated by reference numeral P1) of the photographing optical system (and the irradiation optical system). Alignment adjustment is required when photographing the apparatus 500. At this time, the positional relationship between the apparatus 500 and the eye to be inspected E is adjusted so that the above-mentioned pupil position P1 substantially coincides with the pupil P2 of the eye to be inspected E. Will be done. In FIGS. 4 to 6, the passing range of the light flux in the eye E to be inspected, which corresponds to a certain shooting range (referred to as the required shooting range), is shown by a dotted line.

First, the housing 1a is attached to the subject's face. As a result, the fulcrum portion 130 comes into contact with the peripheral portion (here, the side surface of the nasal muscle) of the eye E to be inspected. Next, acquisition and display of the anterior segment observation image may be started. At this time, the alignment index may be projected at the same time.

At the time when the fulcrum 130 comes into contact with the nose N, the pupil P1 of the optical system does not necessarily match the pupil P2 of the eye E to be inspected. Therefore, the examiner tilts the irradiation optical system 110 with the contact position as a fulcrum. At this time, in the anterior segment observation image, the position of the optical axis L (for example, the center of the image) is tilted in a direction approaching the apex of the cornea (or the center of the pupil) (FIG. 4 (a) ⇒ FIG. 4 (b)). ).

In the present device 500, alignment is performed by using at least such tilt adjustment. Since the fulcrum portion 130 is in contact with the periphery of the eye E in advance, at least a certain amount of gap is always secured between the front surface of the device and the eyeball, so that the device may unintentionally contact the eyeball. It is possible to prevent the subject's face from coming into contact with the optical portion of the device (for example, the front surface of the objective mirror 117). Such an adjustment method is particularly effective when the required working distance is short. Since the required working distance has a trade-off relationship with the aperture and angle of view of the objective mirror 117 in the fundus photography device, it is an effective adjustment method for making the device compact and wide-angle.

However, since the shape of the subject's face differs between the subjects, it is conceivable that the pupil P1 of the optical system does not always match the pupil P2 only by the tilt adjustment. Therefore, the present device 500 may have an adjustment mechanism 140 (shift mechanism). As described above, the adjustment mechanism 140 shifts the position of the optical axis L with respect to the protrusion 130 in the direction orthogonal to the optical axis L. This makes it possible to adjust the alignment for faces of various shapes.

For example, FIG. 5 is a diagram showing an alignment procedure for a subject whose nose N and eye E to be examined are separated in the X direction with respect to FIG. In this case, for example, as shown in FIG. 5, first, by tilt adjustment, the position of the pupil P1 is set to the same position as the pupil P2 of the eye E to be inspected with respect to the axial direction of the optical axis L (here, the same Z position). ) (Fig. 5 (a) ⇒ Fig. 5 (b)). Next, the position of the pupil P1 may be aligned with the pupil P2 of the eye E to be inspected by moving the optical axis L away from the fulcrum 130 by the adjusting mechanism 40 (FIG. 5 (b) ⇒ FIG. 5). (C)).

As another example, FIG. 6 is a diagram showing an alignment procedure for a subject having a high nose N (the orbit is recessed) with respect to FIG. 4. In this case as well, as in the case of FIG. 5, first, the position of the pupil P1 of the optical system is adjusted to the same position as the pupil P2 of the eye E to be inspected with respect to the axial direction of the optical axis L by tilt adjustment (FIG. 6A). ⇒Fig. 6 (b)). That is, the pupil P1 is moved on the plane m that is orthogonal to the optical axis L and passes through the pupil P2. Next, the position of the pupil P1 can be aligned with the pupil P2 of the eye E to be inspected by moving the optical axis L away from the fulcrum 130 by the adjustment mechanism 140 (FIG. 6 (b) ⇒ FIG. 6). (C)).

In FIG. 6C, the required photographing range corresponding to the dotted line and the irradiation range of the illumination light corresponding to the alternate long and short dash line are out of alignment. However, in the present embodiment, since the optometry optical system 120 is tilt-moved integrally with the irradiation optical system 110, the optometry optical axis coincides with the optical axis L regardless of the tilt amount. Therefore, the deviation shown in FIG. 6C can be eliminated by inducing fixation. Further, in a device in which the fixation direction with respect to the eye E to be examined does not change before and after the tilt adjustment, for example, the optical scanner 115 corrects the displacement of the irradiation range due to the tilt adjustment in the scanning range of the illumination light. The drive range in may be switched.

At least one of the above tilt adjustment and shift adjustment (that is, the alignment adjustment of the present device 1) may be controlled based on the anterior segment observation image. That is, the guidance control of the alignment state in this embodiment may drive and control the adjustment mechanism 140 or 150 based on the front eye observation image. As described above, in the present embodiment, even with the head-mounted device, automatic alignment is possible, so that the burden required for alignment adjustment of the examiner and the examinee can be reduced. At this time, the alignment adjustment for the right eye and the alignment adjustment for the left eye may be controlled at the same time (in other words, in parallel). As a result, the time for alignment adjustment for each of the right eye and the left eye can be suppressed.

When one or both of the tilt adjustment and the shift adjustment are manually performed, the operation unit may be provided on the outer surface of the housing 100a. The operating unit is used, for example, to determine the driving amount of the driving mechanism 150 or the adjusting mechanism 140. For example, the operation unit may be a "dial", a "knob", a "lever", or the like. The operation unit may be operated by an examiner. Further, the operation unit may be operated by the subject. That is, this device may be used in so-called self-optometry.

Further, the guidance control of the alignment state in the present embodiment notifies at least one of the examiner and the subject of the guide regarding the driving of the adjustment mechanism 140 or 150 based on the front eye observation image. You may. The guide may be notified to the examiner or the subject as audio or visual information. For example, at this time, the amount of misalignment may be notified, the direction for eliminating the misalignment may be notified, or the operation for that purpose may be notified.

In the present embodiment, a head-mounted type (here, eyeglass type) housing 100a is adopted, and the positional relationship between the housing 100a and the face is likely to be kept constant, so that the subject whose head is not stable On the other hand, the burden of inspection can be reduced.

<Various configurations that appear on the appearance of the housing in the first optical unit>
In an eye examination device, ambient light can be noise. In particular, in fundus examination, ambient light can cause the eye to be examined to have miosis.

On the other hand, the housing 100a of the present device 500 may have a light-shielding portion that blocks ambient light in a space (gap) formed between the housing 100a and the face of the subject. For example, in the example of FIG. 7, the housing 100a has front panels 101L, 101R and an eyepiece 102 as a light-shielding portion. The front panels 101L and 101R cover the transmission side of the objective mirror 117. As a result, the ambient light from the transmission side of the objective mirror 117 is blocked.

The eyepiece 102 blocks ambient light from the side surface of the housing. The eyepiece 102 is a so-called eyecup that suppresses the inclusion of ambient light during an examination. In the present device 500, the eyepiece 102 secures a gap between the front surface of the objective mirror 117 and the face of the subject, and the space is shielded from light. The eyepiece 102 may be made of a flexible member such as soft plastic, rubber, or urethane.

<Entry route for eyelids>
An approach path 103 for opening the eyelids may be further formed on the side surface of the housing 100a of the apparatus 500. The approach path 103 connects, for example, the outside of the housing, the space between the housing 101a and the face of the subject (the space between the front surface of the objective mirror 117 and the face of the subject). The approach path 103 may be formed as a gap or an opening. It may be used to assist the eyelid opening by allowing the eyelid opening device and the finger of the examiner or the subject to enter.

The position of the approach path 103 may be determined so that the device or finger invading from the approach path 103 is included in the imaging range of the anterior segment observation optical system 125. This makes it easy for the examiner to confirm the status of the eyelid opening work with the device or the finger through the observation of the anterior segment of the eye.

<The shading state on the transmissive side of the objective mirror can be switched>
The housing 100a of the apparatus 500 may further switch the light-shielding state on the transmission side of the objective mirror 117. The light-shielding state may be switched between a first light-shielding state in which the transmission side of the objective mirror 117 is shielded by a light-shielding member and a second light-shielding state in which the transmission side of the objective mirror 117 is opened. At this time, the light-shielding state may be individually switched for each of the left eye and the right eye. For example, in the example of FIG. 7, the left front panel 101L and the right front panel 101R may be independently detachable from the housing 100a. In this case, the housing 100a has a attachment / detachment mechanism for the front panels 101L and 100R, but instead, the housing 100a has a flip-up mechanism for the front panels 101L and 100R, a slide mechanism, and the like. May be good. Of the eye to be inspected and the opposite eye, the eye to be inspected may be in a first light-shielding state, and the opposite eye side may be in a second light-shielding state. For example, it is possible to induce fixation with an external fixation lamp using the opposite eye. In addition, when the subject is, for example, an infant who does not understand words, by arranging close relatives in a desired fixation direction, this configuration is used to guide fixation in the desired direction. You may use it.

At this time, it is conceivable that the optometry optical system 120 or the anterior segment observation optical system 125 interferes with the induction of optometry by the opposite eye. Therefore, a part or all of each optical system of the optometry optical system 120 and the anterior segment observation optical system 125 may be detachable from the housing 100a. In order to facilitate attachment / detachment, the attachment / detachment points of the optometry optical system 120 and the anterior segment observation optical system 125 may be integrated (unitized).

Further, by projecting the inspection light from another eye examination device different from the present device 500 from the transmission side of the objective mirror 117 in the second light-shielded state, the inspection of the eye to be inspected by the present device 500 can be performed. Opposite eye examination by another eye examination device may proceed in parallel.

Although the present disclosure has been described above based on the embodiment, the present disclosure is not limited to the above embodiment, and various modifications are allowed.

For example, in the above embodiment, the alignment adjustment has been described as a combination of the tilt adjustment and the shift adjustment, but the alignment adjustment is not necessarily limited to this. Alignment adjustment may be possible only by shift adjustment in the XYZ direction. In this case, for example, the irradiation optical system 110 may be moved in the front-rear direction by the drive mechanism 150.

For example, the ophthalmic device and the eye examination device according to each of the above embodiments have been described as a handy type device, but the device is not necessarily limited to this, and may be a stationary type device. In this case, the ophthalmic apparatus and the eye examination apparatus may be provided with a tilt mechanism for tilting and adjusting the optical axis of the irradiation optical system around the contact position between the fulcrum portion and the user's face. By providing this tilt mechanism, even in a stationary type device, it is possible to adjust the positional relationship between the eye and the optical axis (that is, alignment adjustment) by using tilting. The tilt mechanism may be driven manually or may be driven based on a control signal. A typical stationary type device was provided with a face support unit (chin cradle and forehead rest) to support the subject's face. On the other hand, if the fulcrum portion is provided as in the present disclosure, the position of the face can be stabilized by contacting the fulcrum portion with the face of the subject, so that the face support unit is not always necessary. Not done.

500 ophthalmic equipment

Claims (8)

An ophthalmic device with a housing that can be worn on the user's face.
In the housing
An irradiation optical system including at least an objective mirror for guiding the light onto the retina of the user's eye by reflecting the light.
An ophthalmic apparatus comprising, on the transmission side of the objective mirror, a second optical system that transmits light through the objective mirror to perform either light projection or light reception. The ophthalmic apparatus according to claim 1, wherein the second optical system is an anterior segment observation optical system for obtaining an anterior segment observation image. A driving means provided in the housing for adjusting the alignment state between the irradiation optical system and the eye, and
The ophthalmic apparatus according to claim 2, further comprising a control means for inducing the alignment state based on the front eye observation image. The ophthalmic apparatus according to claim 1, wherein the second optical system is an optometry optical system for projecting an optometry target. The housing is a first light-shielding means for blocking ambient light from at least the transmission side of the objective mirror, and is a first light-shielding state in which the transmission side of the objective mirror is blocked and transmission of the objective mirror. The ophthalmic apparatus according to any one of claims 1 to 4, further comprising a first light-shielding means capable of switching between a second light-shielding state in which the side is opened and a light-shielding state. The ophthalmic apparatus according to claim 5, wherein the second optical system is detachable from the housing. The ophthalmic apparatus according to any one of claims 1 to 6, wherein the housing includes at least a second light-shielding means for blocking ambient light from the side surface of the housing. The ophthalmology according to claim 7, wherein an approach path for opening the eyelid is further formed on the side surface of the housing, which connects the outside of the housing and the space between the housing and the user's face. apparatus.