JP7127333B2 - Optometry equipment - Google Patents

Description

The present disclosure relates to an optometry apparatus that presents a corrected appearance of an eye to be examined.

An optical member such as a spherical lens or a cylindrical lens is placed in front of the subject's eye, and the optical characteristics (for example, refractive power, etc.) of the subject's eye are measured by presenting the test optotype through the optical member. An optometric apparatus is known (see Patent Document 1).

JP-A-5-176893

For example, when spectacles are manufactured, lenses for correcting the subject's eye are prescribed based on the optical characteristics of the subject's eye obtained using an optometric apparatus. In recent years, from the point of view of improving the visual quality of an eye to be inspected, attention has been paid to changes in optical characteristics at various examination distances such as in a far vision state and a near vision state. Along with this, there is a tendency that it is more preferable to prescribe lenses that are optimal for the optical characteristics of the subject's eye at each examination distance. However, changing the inspection distance is troublesome, and it is not easy to confirm the change in optical characteristics due to the difference in the inspection distance and prescribe the optimum lens.

A technical problem of the present disclosure is to provide an optometry apparatus capable of easily prescribing a lens suitable for a subject in view of the above-described conventional technology.

In order to solve the above problems, the present invention is characterized by having the following configurations.
(1) The optometry apparatus according to the present disclosure includes a first correction amount for correcting a first optical characteristic of the subject's eye measured while the target light beam is projected at the first presentation distance, and a second correction amount for correcting a second optical characteristic of the subject's eye measured in a projected state at a second presentation distance different from the first presentation distance; and the first correction amount. A first state in which the target luminous flux corrected by is projected onto the subject's eye at the first presentation distance, and a target luminous flux corrected by the second correction amount is projected onto the subject's eye at the second presentation distance a second state projected onto the eye to be examined; and setting means for setting the appearance to be presented to the subject. The second presentation distance is a near distance of the subject's eye, and the setting means, in a state in which either the first state or the second state of appearance is set, based on the correction amount switching signal, At least, switching between the cylindrical power and the astigmatic axis angle of the first correction amount in the far distance and the cylindrical power and the astigmatic axis angle of the second correction amount in the near distance is performed. do.

1 is an external view of an optometric apparatus; FIG. It is a figure explaining the measurement position of an eye refractive power measurement unit. It is a schematic diagram showing an internal configuration of a holding unit. It is a figure explaining a projection optical system. Fig. 3 is a schematic diagram of an observation unit; 1 is a schematic diagram of an eye refractive power measurement unit; FIG. It is a figure which shows the control system of an optometric apparatus. It is an example of a switching screen displayed on the monitor.

<Overview>
One exemplary embodiment will be described with reference to the drawings. 1 to 8 are diagrams for explaining the optometric apparatus according to this embodiment. The items classified by <> below can be used independently or in association with each other.

For example, the optometry apparatus includes a target presenting unit (for example, display 11) that emits a target light beam. Further, for example, the optometric apparatus has a target presenting unit, and includes a projection optical system (for example, a projecting optical system 10) that projects the target light flux emitted from the target presenting unit toward the eye to be examined. . Further, for example, the optometric apparatus includes a correction optical system (for example, an eye refractive power measurement unit 50) that is arranged in the optical path of the projection optical system and changes the optical characteristics of the target light beam.

<Acquisition means>
For example, the optometric apparatus includes acquisition means (for example, control unit 80). The obtaining means obtains a first correction amount for correcting a first optical characteristic of the subject's eye measured with the target light flux projected at the first presentation distance, and a target light flux different from the first presentation distance. and a second correction amount for correcting the second optical characteristic of the subject's eye measured in the projected state at the second presentation distance.

For example, the first correction amount is set based on the first optical characteristic of the subject's eye. That is, the first correction amount may be a correction amount for correcting the spherical power, the cylindrical power, and the astigmatic axis angle at the first presentation distance of the subject's eye. For example, the second correction amount is set based on the second optical characteristic of the subject's eye. That is, the second correction amount may be a correction amount for correcting the spherical power, the cylindrical power, and the astigmatic axis angle at the second presentation distance of the subject's eye. Thereby, the amount of correction based on the optical characteristics for each presentation distance of the subject's eye is acquired. In addition, in the present embodiment, such a correction amount may be a correction power for correcting each of the cylindrical power and the astigmatism axis angle in addition to the spherical power. Further, as such a correction amount, a correction amount that takes addition into account is acquired according to the spherical power in the first optical characteristic and the second optical characteristic of the subject's eye, the accommodation power of the subject's eye, age, and the like. good too.

For example, the first presentation distance may be at least one of a far distance, an intermediate distance, a near distance, and the like with respect to the subject's eye. Also, for example, the second presentation distance may be at least one of a far distance, an intermediate distance, a near distance, and the like with respect to the subject's eye. Note that the first presentation distance and the second presentation distance may be different distances, and the first presentation distance and the second presentation distance may be both short distances, intermediate distances, far distances, or the like. . For example, in this embodiment, the first presentation distance is the far distance of the subject's eye, and the second presentation distance is the near distance of the subject's eye.

For example, the first optical characteristic and the second optical characteristic of the subject's eye are optical characteristics including at least one of spherical power, cylindrical power, astigmatic axis angle, and the like. Of course, prisms, oblique amounts, etc. may be included in addition to these optical properties. For example, in this embodiment, a first correction amount for correcting the first optical characteristic of the subject's eye and a second correction amount for correcting the second optical characteristic of the subject's eye are obtained. In other words, correction amounts such as spherical power, cylindrical power, astigmatism axis angle, etc. of the subject's eye are obtained. In addition, in the present embodiment, the first correction amount and the second correction amount are correction amounts including at least the cylindrical power and the astigmatism axis angle.

For example, the obtaining means switches between the first presentation distance and the second presentation distance using presentation distance switching means (for example, the far/near switching unit 20) provided in the optometric apparatus, and uses the correction optical system provided in the optometric apparatus to The first correction amount and the second correction amount may be acquired by measuring . Of course, the acquiring means may acquire the first correction amount and the second correction amount by receiving the first correction amount and the second correction amount measured by another device.

<Setting method>
For example, the optometric apparatus includes setting means (for example, control unit 80). The setting means projects the target light flux corrected by the first correction amount onto the subject's eye at the first presentation distance, and the target light flux corrected by the second correction amount at the second presentation distance. and the second state projected onto the subject's eye at , is presented to the subject.

For example, when a setting is made to present the appearance of the first state to the subject's eye, the setting means controls the correcting optical system to correct the target luminous flux with the first correction amount, and the projection optical system may be controlled to project the target luminous flux corrected by the first correction amount onto the subject's eye at the first presentation distance, thereby presenting the subject with the appearance of the first state. Further, for example, when setting is made to present the appearance of the second state to the subject's eye, the setting means controls the correcting optical system to correct the target light flux with the second correction amount, The appearance of the second state may be presented to the subject by controlling the optical system and projecting the target light flux corrected by the second correction amount onto the subject's eye at the second presentation distance. For example, in such a configuration, the subject's eye is corrected using the optometry apparatus 1, so the subject can directly experience the actual vision with a feeling close to normal.

For example, when setting is performed to present the appearance of the first state to the subject's eye, the setting means projects the target luminous flux corrected by the first correction amount onto the subject's eye at the first presentation distance. The subject may be presented with the appearance of the first state by displaying on the display means a first simulation image showing the result of simulating the target light flux formed on the fundus of the subject's eye. Further, for example, when setting is performed to present the appearance of the second state to the subject's eye, the setting means projects the target luminous flux corrected by the second correction amount onto the subject's eye at the second presentation distance. The subject may be presented with the appearance of the second state by displaying on the display means a second simulation image showing the result of simulating the target luminous flux formed on the fundus of the subject's eye. . In other words, the setting means can present the appearance to the eye to be examined by displaying a simulation image that assumes the appearance when the eye to be examined sees the test optotype corrected by the acquired correction amount. good. With such a configuration, the subject can indirectly experience how the simulated image looks. Examples of the display means include a monitor (for example, the monitor 107) included in the optometry apparatus, an external terminal (for example, a tablet terminal, etc.), a head-mounted display, and the like.

For example, the setting means switches between the first correction amount and the second correction amount based on the correction amount switching signal in a state in which either the first state or the second state of appearance is set. good too. In this embodiment, the correction amount switching signal is output in response to an operation instruction by the examiner. For example, with such a configuration of the optometry apparatus, the examiner can select a correction state that is easier for the examinee to see, and can prescribe a lens that takes into account each person's vision.

In this embodiment, all the parameters of the first correction amount and the second correction amount may be switched by the setting means. That is, all of the parameters included in the first correction amount and the parameters of the second correction amount corresponding to the parameters included in the first correction amount may be switched. For example, the spherical power, the cylindrical power, and the astigmatic axis angle in the first correction amount and the spherical power, the cylindrical power, and the astigmatic axis angle in the second correction amount may be switched.

Further, in this embodiment, at least a part of the parameters of the first correction amount and the second correction amount may be switched by the setting means. That is, at least some parameters in the first correction amount and parameters in the second correction amount corresponding to at least some parameters in the first correction amount may be switched. As an example, the cylindrical power and the astigmatic axis angle in the first correction amount and the cylindrical power and the astigmatic axis angle in the second correction amount may be switched. For example, a progressive lens has a fixed value for the cylindrical power and astigmatism axis angle for the distance and near vision areas. Correction is preferred. For example, by adopting a configuration in which at least a part of the parameters of the first correction amount and the second correction amount can be switched in this way, it is possible to obtain more optimal correction for the subject when prescribing a progressive lens or the like. You can choose the quantity.

For example, the setting means switches between the first presentation distance and the second presentation distance based on the presentation distance switching signal in a state in which either the first state or the second state of appearance is set. good too. In this embodiment, the presentation distance switching signal is output in response to an operation instruction by the examiner. For example, the presentation distance switching signal and the aforementioned correction amount switching signal may be output at the same timing, or may be output at different timings. As a result, the appearance of the test optotype placed at the first presentation distance or the second presentation distance with the optotype light beam corrected by the first correction amount, or the state of the optotype light beam corrected by the second correction amount. , the examinee can feel how the test target placed at the first presentation distance or the second presentation distance looks.

For example, the optometry apparatus includes presentation distance acquisition means (for example, control unit 80). The presentation distance acquisition means acquires the presentation distance presented to the subject's eye. For example, such presentation distance may be a presentation distance different from the first presentation distance and the second presentation distance. Also, such presentation distances may be at least one presentation distance. In other words, the presentation distance acquisition means may acquire one presentation distance different from the first presentation distance and the second presentation distance, or may acquire a plurality of presentation distances different from the first presentation distance and the second presentation distance. It may be configured to acquire the distance.

For example, in such a configuration, the setting means may set the first presentation distance or the second presentation distance based on the presentation distance switching signal in a state in which either the first state or the second state of appearance is set. The distance may be switched to the presentation distance acquired by the presentation distance acquisition means. Accordingly, it is possible to switch the correction amount in consideration of presentation distances different from the first presentation distance and the second presentation distance, and present various appearances to the subject's eye.

<Example>
The optometry apparatus will be described below. In this embodiment, the lateral direction of the optometric apparatus is represented as the X direction, the vertical direction as the Y direction, and the front-rear direction as the Z direction.

FIG. 1 is an external view of an optometric apparatus. FIG. 1(a) is a perspective view of the optometric apparatus 1 viewed from the front side. FIG. 1(b) is a perspective view of the optometric apparatus 1 as seen from the rear side. For example, the optometric apparatus 1 includes a housing 2, a presentation window 3, a controller 81, a holding unit 4, a projection optical system 10, an observation unit 40, an eye refractive power measurement unit (correction optical system) 50, and the like.

For example, in this embodiment, the subject faces the front of the housing 2 . The presentation window 3 is used when presenting a test optotype to the eye E to be examined. The presentation window 3 transmits the target light flux from the projection optical system 10 . Therefore, a target light flux is projected through the presentation window 3 onto the subject's eye. When the eye refractive power measurement unit 50 is arranged between the presentation window 3 and the subject's eye E, a target luminous flux is projected onto the subject's eye through the presentation window 3 and an examination window 53, which will be described later. For example, the presentation window 3 is covered with a transparent panel to prevent dust from entering. For example, an acrylic plate, a glass plate, or the like can be used as the transparent panel.

The controller 81 includes a monitor 107 that displays various information (e.g., measurement results of the eye to be examined E, etc.), various settings (e.g., arrangement of optical elements provided in the eye refractive power measurement unit 50, display 11, which will be described later). display screen, etc.) are provided. Note that in this embodiment, the monitor 107 is a touch panel, and the monitor 107 also functions as the switch section 108 . A signal from the controller 81 is input to the control section 80 via a cable (not shown). Of course, the signal from the controller 81 may be input to the control section 80 via wireless communication such as infrared rays.

<Holding unit>
The holding unit 4 holds the eye refractive power measurement unit 50 via a connecting portion 5 which will be described later. Also, the holding unit 4 supports the eye refractive power measurement unit 50 at the measurement position or the standby position. FIG. 2 is a diagram for explaining the measurement positions of the eye refractive power measurement unit 50. As shown in FIG. For example, in this embodiment, the measurement position of the eye refractive power measurement unit 50 is a state in which the eye refractive power measurement unit 50 is lowered in front of the housing 2 (see FIG. 2). Further, for example, in this embodiment, the standby position of the eye refractive power measurement unit 50 is a state in which the eye refractive power measurement unit 50 is lifted above the housing 2 (see FIG. 1). Such switching between the standby position and the measurement position is performed by vertically moving the arm 30, which will be described later.

FIG. 3 is a schematic diagram showing the internal configuration of the holding unit 4. As shown in FIG. 3, illustration of the eye refractive power measurement unit 50 is omitted. For example, the holding unit 4 includes a connecting portion 5, a base 31, an arm 30, a drive portion (motor) 6, a shaft 7, a support member 8, and the like.

The connecting portion 5 connects the eye refractive power measuring unit 50 so as to be rotatable about the rotation axis R3. The base 31 is fixedly arranged on the upper surface of the housing 2 . Arm 30 is rotatably attached to base 31 about rotation axis R2. A motor 6 is fixed to the arm 30 . Motor 6 is connected to the upper portion of shaft 7 . The shaft 7 has a threaded portion at its lower portion and is screwed with the support member 8 . The support member 8 is rotatably attached to the base 31 around the rotation axis R1.

For example, when the motor 6 is driven, the shaft 7 rotates in the helical direction of the screw portion and expands and contracts with respect to the support member 8 . That is, depending on the direction of rotation of the motor 6, the portion of the shaft 7 protruding from the support member 8 becomes longer or shorter. For example, when the shaft 7 shrinks (when the portion protruding from the support member 8 becomes longer), the support member 8 rotates in the arrow A direction around the rotation axis R1. At this time, the shaft 7 also rotates in the arrow A direction about the rotation axis R1. The motor 6 connected to the shaft 7 and the arm 30 to which the motor 6 is fixed rotate integrally in the direction of the arrow A around the rotation axis R2. This causes the arm 30 and the connecting portion 5 to move downward. The eye refractive power measurement unit 50 connected to the connecting portion 5 is maintained in a vertical state (substantially vertical state) by its own weight.

Further, for example, when the shaft 7 is extended (when the portion protruding from the support member 8 is shortened), the support member 8 rotates in the arrow B direction around the rotation axis R1. At this time, the shaft 7 also rotates in the arrow B direction about the rotation axis R1. The motor 6 connected to the shaft 7 and the arm 30 to which the motor 6 is fixed rotate integrally in the arrow B direction around the rotation axis R2. This causes the arm 30 and the connecting portion 5 to move upward. The eye refractive power measurement unit 50 connected to the connecting portion 5 is maintained in a vertical state (substantially vertical state) by its own weight.

For example, in this embodiment, by vertically moving the arm 30 with respect to the housing 2, the eye refractive power measurement unit 50 held by the holding unit 4 can be switched between the measurement position and the standby position. can. In this embodiment, switching between the measurement position and the standby position is instructed by an operation switch (not shown) provided on the side surface of the housing 2 .

<Light projection optical system>
The projection optical system 10 has an optotype presenting unit that emits an optotype light beam, and projects the optotype light beam emitted from the optotype presenting unit toward the eye E to be examined. In this embodiment, a display 11, which will be described later, is used as the optotype presenting unit. The projection optical system 10 is housed inside the housing 2 .

FIG. 4 is a view of the projection optical system 10 viewed from the right side of the optometric apparatus 1 (in the direction of arrow C in FIG. 1). FIG. 4(a) shows an optical arrangement for long-distance examination. FIG. 4(b) shows the optical arrangement during near vision examination. For example, the projection optical system 10 includes a display 11, a plane mirror 12, a concave mirror 13, a perspective switching section 20, and the like.

The display 11 displays test targets (for example, Landolt ring targets, fixation targets, etc.). Also, the display 11 emits a target light beam. The target luminous flux emitted from the display 11 forms an image on the fundus of the eye E to be examined, so that the test target displayed on the display 11 is presented to the eye E to be examined. For example, as the display 11, an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence), a plasma display, or the like can be used. The display screen of the display 11 is controlled by a control section 80 which will be described later.

For example, during the distance examination shown in FIG. 4A, the display screen of the display 11 faces the back side of the housing 2, and the target light beam is emitted from the display 11 toward the back side. Note that the target light flux may be emitted from the display 11 in the horizontal direction (Z direction) or in the oblique direction (YZ direction). For example, during the near vision examination shown in FIG. 4B, the display screen of the display 11 faces the upper side of the housing 2, and the target light beam is emitted from the display 11 toward the upper side. Note that the target light flux may be emitted from the display 11 in the vertical direction (Y direction) or in the oblique direction (YZ direction). In this way, the target light flux emitted from the display 11 is projected toward the eye E to be examined.

The plane mirror 12 reflects the optotype light flux emitted from the display 11 and guides it to the concave mirror 13 . Further, the flat mirror 12 reflects the optotype light beam emitted from the display 11 and guides it to the eye E to be examined. For example, the plane mirror 12 is mirror coated only on its lower portion (the solid line portion of the plane mirror 12 shown in FIG. 4), and is mirror coated on the upper portion (the dotted line portion of the plane mirror 12 shown in FIG. 4). It has not been. Therefore, the upper portion of the plane mirror 12 in this embodiment is transparent.

For example, the focal length of the plane mirror 12 is designed such that the distance (that is, the presentation distance) from the subject's eye E to the display 11 is optically 40 cm during the near vision examination. In addition, although the structure using a plane mirror is illustrated in the present Example, it is not limited to this. For example, a configuration using a reflecting member such as a prism, a beam splitter, a half mirror, or the like may be used. That is, it is sufficient if the target light beam can be reflected.

The concave mirror 13 reflects the target light beam emitted from the display 11 and guides it to the plane mirror 12 . For example, the concave mirror 13 sets the presentation distance of the test target displayed on the display 11 to the distance test distance. For example, the focal length of the concave mirror 13 is designed so that the distance from the subject's eye E to the display 11 is optically 5 m during a distance examination. Although the configuration using the concave mirror 13 is exemplified in this embodiment, the configuration is not limited to this. For example, a configuration using a reflecting member such as an aspherical mirror, a free-form surface mirror, or the like may be employed. Further, for example, a configuration using a lens may be employed. For example, in this case, the optotype light flux emitted from the display 11 may be projected onto the subject's eye E via a lens, and the lens may be designed so that the presentation distance is optically 5 m.

For example, during the distance examination shown in FIG. 4(a), a target light beam emitted from the display 11 and passed through the optical members in the order of the plane mirror 12, the concave mirror 13, and the plane mirror 12 is projected onto the eye E to be examined. be done. That is, the target light flux emitted from the display 11 passes through the optical axis L1 and enters the plane mirror 12, and is reflected in the direction of the optical axis L2. This target luminous flux enters the concave mirror 13 and is reflected in the direction of the optical axis L3. Further, this target light beam is incident on the plane mirror 12 and reflected in the direction of the optical axis L4. As a result, the target light beam is projected onto the eye E to be examined. Further, for example, during the near vision examination shown in FIG. 4B, a target light beam emitted from the display 11 and reflected by the plane mirror 12 is projected onto the eye E to be examined. That is, the target light flux emitted from the display 11 passes through the optical axis L3 and enters the plane mirror 12, is reflected in the direction of the optical axis L4, and is projected onto the eye E to be examined. For example, the projection optical system 10 emits the target light flux from the inside of the housing 2 to the outside in this way.

<Perspective Switching>
The perspective switching unit 20 changes the position of the display 11 between the distance examination and the near examination. For example, the far/near switching unit 20 includes a holding unit 21, a gear 22, a motor 23, and the like. The holding portion 21 holds the display 11 . For example, gear 22 has a worm portion 24 and a wheel portion 25 . For example, the worm portion 24 and the wheel portion 25 are formed of gears that mesh with each other. For example, the worm portion 24 is connected to the motor 23 , and the wheel portion 25 is connected to the holding portion 21 . For example, the worm portion 24 is rotated by driving the motor 23, and the wheel portion 25 is accordingly rotated in the direction of the arrow. Note that the gear 22 and the motor 23 are arranged at a position (for example, the side wall of the housing 2) that does not block the target luminous flux from the display 11 toward the eye E to be examined. For example, the far/near switching unit 20 moves the display 11 together with the holding unit 21 in this way, and switches the presentation distance of the test optotype displayed on the display 11 between the distance test and the near test.

<Observation unit>
The observation unit 40 is used to observe the positional relationship between the subject's eye E and the eye refractive power measurement unit 50 . FIG. 5 is a schematic diagram of the observation unit 40. As shown in FIG. For example, the observation unit 40 includes an observation window 41, a shielding portion 42 (see FIG. 4), a cover 43, hinges 44, and the like. Note that the observation unit 40 may be configured to include at least the observation window 41 . A cover 43 is fixed to the housing 2 by a hinge 44 and can be opened and closed with respect to the observation window 41 . For example, the cover 43 can be opened and closed by the examiner pushing and pulling a knob (not shown).

The observation window 41 is used to observe the positional relationship between the subject's eye E and the eye refractive power measurement unit 50 from outside the housing 2 through the presentation window 3 . For example, the observation window 41 in this embodiment is arranged at a position where the position of the pupil of the subject's eye E can be confirmed from the examiner's eye OE. For example, a region of the plane mirror 12 through which the line of sight of the examiner passes is transparent so that the line of sight of the examiner is not blocked by the plane mirror 12 when the examiner looks into the observation window 41 . The shielding part 42 suppresses the target light flux from the projection optical system 10 from entering the observation window 41 . For example, the shielding portion 42 is a transparent portion (portion not coated with mirror coating) of the flat mirror 12 .
and the mirror portion (portion coated with the mirror coat).

For example, the eye refractive power measurement unit 50 at the measurement position is arranged close to the housing 2 . In this embodiment, the distance W (see FIG. 5) from the examination window 53 provided in the eye refractive power measurement unit 50 to the presentation window 3 is designed to be approximately 135 mm. For this reason, the examiner cannot put his or her head between the eye refractive power measurement unit 50 and the housing 2, making it difficult to observe the positional relationship between the subject's eye E and the eye refractive power measurement unit 50. FIG. For example, the observation unit 40 can be effectively used in cases such as this embodiment where the distance W is shorter than the head length of the examiner.

<Eye refractive power measurement unit (corrective optical system)>
The eye refractive power measurement unit 50 is arranged in the optical path of the projection optical system 10 and changes the optical characteristics of the target light beam. FIG. 6 is a schematic diagram of the eye refractive power measurement unit 50. As shown in FIG. For example, the eye refractive power measurement unit includes a forehead rest 51, a pair of left and right lens chamber units 52, an examination window 53, a driving section 54, a driving section 55, a moving unit 56, a corneal position targeting optical system 60, and the like. The forehead rest 51 keeps the distance between the subject's eye E and the eye refractive power measurement unit 50 constant by bringing the subject's forehead into contact.

The lens chamber unit 52 switches and arranges optical elements in the inspection window 53 . For example, a lens disc 57 is provided inside the lens chamber unit 52 . The lens disk 57 has a large number of optical elements (spherical lens, cylindrical lens, dispersion prism, etc.) arranged on the same circumference. For example, the lens disk 57 is rotationally controlled by a drive unit 54 (actuator or the like). As a result, the optical element desired by the examiner is arranged in the inspection window 53 . For example, the optical element arranged in the inspection window 53 is rotationally controlled by a driving section 55 (motor, solenoid, etc.). As a result, the optical element is arranged in the inspection window 53 at the rotation angle desired by the examiner.

For example, the lens disc 57 consists of one lens disc or a plurality of lens discs. For example, when a plurality of lens discs (lens disc group) are provided, a driving unit corresponding to each lens disc is provided. For example, each lens disk of the lens disk group comprises an aperture (or 0D lens) and a plurality of optical elements. Typical types of each lens disc include a spherical lens disc having a plurality of spherical lenses with different powers, a cylindrical lens disc having a plurality of cylindrical lenses with different powers, an auxiliary lens disc, and the like. The lenticular disc in this embodiment also includes a crosshaired alignment lens. For example, at least one of a red filter/green filter, a prism, a cross cylinder lens, a polarizing lens, a Maddox lens, an autocross cylinder lens, etc. is arranged on the auxiliary lens disc. For the detailed configuration of the lens disk 57, see, for example, JP-A-2007-68574 and JP-A-2011-72431.

For example, the moving unit 56 adjusts the spacing of the lens chamber units 52 . For example, the distance between the left and right lens chamber units is adjusted by a driving section 58 having a slide mechanism. Thereby, the interval of the inspection window 53 can be changed according to the interpupillary distance of the eye to be inspected. Further, the moving unit 56 adjusts the convergence angle (inward angle) of the left and right lens chamber units. For example, the angle of convergence of the left and right lens chamber units is adjusted by a driving section 59 having a convergence mechanism. For the detailed configuration of the mobile unit 56, refer to Japanese Patent Application Laid-Open No. 2004-329345.

The corneal position sighting optical system 60 is used to confirm the distance between the corneal vertices of the eye to be examined E and the reference position when the lens is worn. For example, the corneal position aiming optical system 60 is arranged inside the eye refractive power measurement unit 50 and provided in each of the left and right lens chamber units 52 . For the detailed configuration of the corneal position aiming optical system 60, see, for example, Japanese Unexamined Patent Application Publication No. 2004-229769.

Note that the eye refractive power measurement unit 50 is not limited to the configuration described above. For example, the eye refractive power measurement unit 50 may be configured to change the optical characteristics of the target light flux (for example, at least one of spherical power, cylindrical power, astigmatism axis angle, polarization characteristics, amount of aberration, etc.). For example, the configuration for changing the optical characteristics of the target luminous flux may be a configuration for controlling an optical element. For example, a configuration using a wavefront modulation element may be used.

<Control part>
FIG. 7 is a diagram showing a control system of the optometric apparatus 1. As shown in FIG. For example, the control unit 80 includes a CPU (processor), RAM, ROM, and the like. The CPU controls driving of each part in the ophthalmologic apparatus 100 . The RAM temporarily stores various information. Various programs executed by the CPU are stored in the ROM. Note that the controller 80 may be configured by a plurality of controllers (that is, a plurality of processors).

A display 11 , a controller 81 , a nonvolatile memory 82 (hereinafter referred to as memory 82 ), and the like are connected to the control unit 80 . The control unit 80 also includes the motor 6 provided in the holding unit 4, the motor 23 provided in the far/near switching unit 20, the drive units (drive units 54, 55, 58, 59) provided in each member of the eye refractive power measurement unit 50, etc. are connected.

The memory 82 is a non-transitory storage medium that can retain stored content even when power supply is interrupted. For example, the memory 82 may be a hard disk drive, flash ROM, removable USB memory, or the like. The memory 82 may store test targets (for example, Landolt ring targets with visual acuity values of 0.1 to 2.0) and the like.

<Control operation>
A control operation of the optometric apparatus 1 will be described.

The optometry apparatus 1 uses, as correction amounts for correcting the optical characteristics of the eye to be examined E, a first correction amount for correcting the first optical characteristics when the test target is placed at the first presentation distance, and and a second correction amount for correcting a second optical characteristic when the is placed at a second presentation distance different from the first presentation distance. In this embodiment, the first correction amount and the second correction amount are obtained by subjectively measuring the subject's eye E using the optometric apparatus 1 .

In the following description, the test optotype is placed at the far distance of the eye to be examined E as the first presentation distance, and the first optical characteristics of the eye to be examined E measured with the target luminous flux projected at the first presentation distance are expressed as A case where the first correction amount to be corrected is acquired is illustrated. In the following description, the second presentation distance is the second optical target of the eye to be inspected E, which is measured in a state in which the test target is placed at the near distance of the eye to be inspected E, and the target luminous flux is projected at the second presentation distance. A case where the second correction amount for correcting the characteristic is acquired is illustrated.

<Acquisition of first correction amount>
First, a distance examination for the eye E to be examined is performed. The examiner operates an operation switch (not shown) provided on the side surface of the housing 2 to move the eye refractive power measurement unit 50 from the standby position to the measurement position. Further, the examiner operates the operation unit 108 to control the far/near switching unit 20, and sets the display 11 to the arrangement position for the distance examination. As a result, the presentation distance of the test optotype with respect to the eye E to be inspected is set to the first presentation distance, which is the far distance of the eye E to be inspected.

Subsequently, the examiner instructs the subject to touch the forehead against the forehead rest 51 and look into the presentation window 3 through the examination window 53 . At this time, the examiner may use the observation unit 40 to check whether the position of the pupil of the eye E to be examined and the center of the examination window 53 match. At this time, the examiner may use the corneal position aiming optical system 60 to check whether the corneal vertex position of the eye E to be examined is at the reference position when the lens is worn.

The examiner starts subjective measurement of the eye E to be examined when the alignment of the eye E to be examined and the eye refractive power measurement unit 50 is completed. The examiner operates the operation unit 108 to display the test optotype (for example, a Landolt ring optotype with a visual acuity value of 1.0, etc.) on the display 11 . The control unit 80 calls up the corresponding test target from the memory 82 according to the input signal from the controller 81 and controls the display screen of the display 11 . The test optotype displayed on the display 11 is presented to the eye E through the test window 53 and the presentation window 3 .

For example, in subjective measurement, the eye refractive power of the eye to be examined E is corrected to 0D based on the objective eye refractive power (objective value) of the eye to be examined E obtained by objective measurement using an ophthalmologic apparatus or the like. The optical elements of the lens disc 57 placed in the inspection window 53 are controlled so that the The control unit 80 corrects the spherical power and the cylindrical power of the subject's eye E by controlling the driving unit 54 to rotate the spherical lens disc and the cylindrical lens disc. Further, the control unit 80 corrects the astigmatism axis angle of the subject's eye E by controlling the driving unit 55 to rotate the optical element. As a result, the amount of correction for making the refractive power of the eye E to be examined 0D is obtained. That is, each of the spherical power, the cylindrical power, and the astigmatic axis angle for making the eye refractive power of the eye E to be examined 0D is acquired. Note that the control unit 80 may control the lens disk 57 so as to correct the refractive power of the eye E to be examined to a value other than 0D (for example, -1D).

Subsequently, the examiner switches the test target displayed on the display 11 and confirms whether the amount of correction is appropriate for the examinee. For example, the examiner asks the subject about the direction of the clearance of the Landolt ring optotype. In the case of an incorrect answer, the visual acuity value is switched to a test target that is one step lower. The control unit 80 switches the test target to be displayed on the display 11 at any time based on a signal for changing the test target input from the operation unit 108 . If the amount of correction is not appropriate for the subject, the examiner operates the operation unit 108 to change the amount of correction, and checks whether the amount of correction after the change is appropriate for the subject. You can judge.

For example, in this way, the first optical characteristic of the subject's eye E is measured while the target light beam is projected at the first presentation distance (that is, while the test target is presented from the first presentation distance). A first correction amount for correcting the first optical characteristic is acquired based on the correction amount for the state judged appropriate by the user. For example, a first correction amount is obtained for each of the left eye and the right eye. The control unit 80 stores in the memory 82 the first correction amounts for the left and right eyes obtained at the first presentation distance.

<Acquisition of second correction amount>
Subsequently, a near vision examination for the eye E to be examined is performed. The examiner operates the operation unit 108 to control the far/near switching unit 20 to set the display 11 to the arrangement position for the near vision examination. As a result, the presentation distance of the test optotype with respect to the eye E to be inspected is set to the second presentation distance, which is the near distance of the eye E to be inspected. For example, the control unit 80 measures the second optical characteristic of the subject's eye E while projecting the optotype light flux at the second presentation distance (that is, while presenting the test optotype from the second presentation distance), A second correction amount for correcting the second optical characteristic is obtained. Since the second correction amount can be obtained in the same manner as the first correction amount, the explanation thereof is omitted. For example, when the controller 80 acquires the second correction amounts for the left eye and the right eye, they are stored in the memory 82 .

Here, for example, when prescribing a progressive lens to a subject, the state in which the subject's eye E is corrected by the first correction amount and the state in which the subject's eye E is corrected by the second correction amount are shown. Sometimes it is better to consider the situation. Since a progressive lens has fixed values for the cylindrical power and astigmatism axis angle for the distance and near portions, it is corrected with a more suitable amount of correction according to the subject's vision and visual environment. is preferred. For this reason, in the present embodiment, the states in which the eye E to be examined is corrected by the first correction amount and the second correction amount are switched to present the appearance of the eye E to be examined. This will be explained below.

<Initial settings>
For example, when the examiner acquires the first correction amount and the second correction amount for the eye E to be examined, the examiner sets an initial state for presenting the appearance to the eye E to be examined. The control unit 80 performs a first state in which the target light flux corrected by the first correction amount is projected onto the subject's eye at the first presentation distance, and a second presentation of the target light flux corrected by the second correction amount. Either the second state projected on the subject's eye at a distance or the appearance is presented to the subject. For example, the appearance in each state may be directly experienced by the subject by correcting the eye E to be examined, or may be indirectly experienced by the subject using a simulation image or the like. can be In the following, a case of presenting the appearance of the second state using the optometric apparatus 1 will be taken as an example.

For example, the examiner operates the monitor 107 to set the second state (that is, the state in which the second correction amount and the second presentation distance are set). For example, the examiner may select an operation button (not shown) for setting the initial state, or select a switching button 94d described later. When the control unit 80 is set to present the appearance of the second state to the subject's eye, the control unit 80 controls the light projecting optical system 10 to operate the far/near switching unit 20, and moves the display 11 to the near distance. and switch. Further, the control unit 80 controls the eye refractive power measurement unit (correction optical system) 50 to switch the optical elements of the lens disk 57, and corrects the target light flux emitted from the display 11 by the second correction amount. By projecting the optotype light beam corrected by the second correction amount from the second presentation distance onto the eye E to be examined, the appearance of the second state can be presented to the eye E to be examined.

The initial state for presenting the appearance to the subject's eye E may be a configuration in which the examiner selects the first state or the second state as in the present embodiment. Any one of the preset states may be automatically selected along with the acquisition of the first correction amount and the second correction amount.

<Switching of Correction Amount>
FIG. 8 is an example of a switching screen 90 displayed on the monitor 107. As shown in FIG. For example, the switching screen 90 displays a first optical characteristic 91 of the subject's eye E acquired at a first presentation distance (far distance in this embodiment) and a second presentation distance (near distance in this embodiment). A second optical characteristic 92 of the subject's eye E acquired in , a mark 93 that schematically represents the presentation distance of the test optotype, a switch button 94 for switching the appearance of the subject's eye E, and the like are displayed. For example, the switching button 94 projects the optotype luminous flux corrected by the first correction amount from the first presentation distance (that is, presents the appearance of the first state), and the switching button 94a A switching button 94b for projecting the target light flux corrected by the second correction amount, a switching button 94c for projecting the target light flux corrected by the first correction amount from the second presentation distance, and a switch button 94c for projecting the target light flux corrected by the first correction amount from the second presentation distance. It may be configured with a switching button 94d that projects the target light beam corrected by the two correction amounts (that is, presents the appearance of the second state).

For example, when the examiner sets the initial state for presenting the appearance to the subject's eye E to the second state in which the second correction amount and the second presentation distance are set, the examiner operates the monitor 107 to display the first correction amount. and the second correction amount. In this embodiment, when the examiner selects the switching buttons 94c and 94d, a correction amount switching signal is output, and based on this correction amount switching signal, the controller 80 switches between the first correction amount and the second correction amount. Perform a switch. For example, when the examiner selects the switch button 94c, the controller 80 switches the optical elements of the lens disk 57 and projects the target light beam corrected by the first correction amount onto the eye E to be examined. That is, the subject's eye E visually recognizes the inspection optotype in a state corrected by the first correction amount. Further, for example, when the examiner operates the switching button 94d, the control unit 80 switches the optical elements of the lens disk 57 and projects the target light flux corrected by the second correction amount. That is, the subject's eye E visually recognizes the inspection optotype in a state corrected by the second correction amount.

At this time, the examiner may operate the operation unit 108 to switch between the first correction amount and the second correction amount while presenting the eye to be examined E with a test optotype such as a Landolt's ring optotype. Further, the examiner may determine the visual acuity value of the subject's eye E by asking the examinee how well the test optotype can be seen. For example, the visual acuity value determined by the examiner can be input and displayed on the monitor 107 . The visual acuity values in the first state in which the first correction amount and the first presentation distance are set and in the second state in which the second correction amount and the second presentation distance are set are stored when the subjective measurement is performed. It is also possible to use the measurement results obtained and display them.

For example, the examiner asks the subject which state is easier to see while switching between the first correction amount and the second correction amount. For example, when the subject answers that the corrected state with the first correction amount is easy to see, the first correction amount may be used as the prescription value of the lens. Further, for example, when the subject answers that the corrected state with the second correction amount is easy to see, the second correction amount may be used as the prescription value of the lens. This makes it possible to prescribe lenses that are more suitable for the subject.

<Switching the presentation distance>
For example, although switching between the first correction amount and the second correction amount has been described above, switching between the first presentation distance and the second presentation distance may be performed. For example, when the examiner sets the initial state for presenting the appearance to the subject's eye E to the second state (that is, the state in which the second correction amount and the second presentation distance are set), the examiner operates the monitor 107 to , to switch between the first presentation distance and the second presentation distance. In this embodiment, when the examiner selects the switching buttons 94a and 94c or the switching buttons 94c and 94d, a presentation distance switching signal is output, and based on this presentation distance switching signal, the control unit 80 performs the first presentation. Switching between the distance and the second presentation distance is performed.

For example, when the examiner selects the switching button 94b, the control section 80 operates the far/near switching section 20 to project the target light flux onto the subject's eye E from the first presentation distance. That is, the subject's eye E visually recognizes the test target arranged at the first presentation distance. Further, for example, when the examiner operates the switching button 94d, the control section 80 operates the far/near switching section 20 to project the target light flux from the second presentation distance. That is, the subject's eye E visually recognizes the test target arranged at the second presentation distance.

As a result, how the eye to be examined E is corrected with the first correction amount at the far distance and near distance, or the far distance and the near distance with the eye E corrected with the second correction amount. You can check how it looks in For example, the subject can feel how the vision changes at a long distance when the amount of correction at a short distance is emphasized.

As described above, for example, the optometry apparatus of the present embodiment includes a first correction amount for correcting the first optical characteristic of the subject's eye measured while the target light beam is projected at the first presentation distance, a second correction amount for correcting a second optical characteristic of the subject's eye measured with the target light beam projected at a second presentation distance different from the first presentation distance; Further, the optometry apparatus of the present embodiment has a first state in which the optotype light beam corrected by the first correction amount is projected onto the eye to be examined at the first presentation distance, and an optometry corrected by the second correction amount. A second state in which the luminous flux is projected onto the subject's eye at a second presentation distance, or a second state is set to present to the subject, and further, either the first state or the second state is displayed. With the first correction amount set, the first correction amount and the second correction amount are switched based on the correction amount switching signal. As a result, the examiner can make the examinee select a state in which it is easier to see, and can prescribe lenses in consideration of how the examinee sees.

Further, for example, the optometry apparatus of the present embodiment controls the correction optical system to correct the target luminous flux with the first correction amount when setting is made to present the appearance of the first state to the eye to be examined. At the same time, the projection optical system is controlled to project the target light flux corrected by the first correction amount onto the subject's eye at the first presentation distance, thereby presenting the appearance of the first state to the subject. do. Further, for example, when the optometry apparatus of the present embodiment is set to present the appearance of the second state to the eye to be examined, the correction optical system is controlled to correct the target luminous flux with the second correction amount. At the same time, the projection optical system is controlled to project the target light beam corrected by the second correction amount onto the subject's eye at the second presentation distance, thereby presenting the second state of appearance to the subject. . As a result, the subject can experience the actual appearance with a feeling close to normal, and can select a more suitable correction state.

Further, for example, the optometric apparatus of the present embodiment changes the first presentation distance and the second presentation distance based on the presentation distance switching signal in a state in which either the first state or the second state of appearance is set. switch. As a result, the appearance of the test optotype placed at the first presentation distance or the second presentation distance with the optotype light beam corrected by the first correction amount, or the state of the optotype light beam corrected by the second correction amount. , the examinee can feel how the test target placed at the first presentation distance or the second presentation distance looks.

<transformation example>
In this embodiment, the case where the first presentation distance of the test optotype is the far distance and the second presentation distance is the short distance has been described as an example, but the present invention is not limited to this. For example, the first presentation distance may be the near distance, and the second presentation distance may be the far distance. That is, the first presentation distance and the second presentation distance may be different distances.

Note that the optometric apparatus 1 has a configuration in which the test optotype can be set to either a far distance of 5 m or a short distance of 40 cm, but may be configured to set an arbitrary presentation distance. In this case, the control unit 80 may acquire the presentation distance of the test optotype presented to the eye E to be examined. In other words, the control unit 80 may acquire a presentation distance (hereinafter referred to as a third presentation distance) that is different from the first presentation distance and the second presentation distance. For example, the control unit 80 switches from the first presentation distance or the second presentation distance to the third presentation distance based on the presentation distance switching signal in a state in which either the first state or the second state of appearance is set. Switching may be performed. The presentation distance different from the first presentation distance and the second presentation distance may be a plurality of presentation distances, and the third presentation distance, the fourth presentation distance, . may

For example, the optometry apparatus of this embodiment obtains the presentation distance presented to the eye to be inspected in this way, and in a state in which either the first state or the second state of appearance is set, the presentation distance switching signal is switched from the first presentation distance or the second presentation distance to the third presentation distance. Accordingly, it is possible to switch the correction amount in consideration of the third presentation distance different from the first presentation distance and the second presentation distance, and present various appearances to the subject's eye. As an example, when the first presentation distance and the second presentation distance are the far distance and the near distance, respectively, it is possible to present the appearance at the intermediate distance as the third presentation distance.

In the present embodiment, the configuration for switching all the parameters (that is, the spherical power, the cylindrical power, the astigmatic axis angle, etc.) in the first correction amount and the second correction amount was explained as an example. Not limited. For example, the configuration may be such that at least some parameters in the first correction amount and the second correction amount are switched. That is, in this embodiment, the control unit 80 may switch between at least some parameters in the first correction amount and parameters in the second correction amount corresponding to at least some parameters in the first correction amount. . As an example, in such a case, the first correction amount and the second correction amount include at least the cylindrical power and the astigmatic axis angle, and the cylindrical power and the astigmatic axis angle in the first correction amount and the second correction amount and the cylindrical power and astigmatism axis angle at may be switched.

For example, the optometric apparatus of this embodiment can switch between at least some parameters in the first correction amount and parameters in the second correction amount corresponding to at least some parameters in the first correction amount. can be done. As a result, for example, when a progressive lens is prescribed, a more optimal correction amount can be selected. As an example, by setting the spherical power as the first correction amount and setting the cylindrical power and the astigmatic axis angle as the second correction amount, it is possible to confirm the appearance etc., so that a more suitable lens can be prescribed. .

In the present embodiment, a second state of appearance in which the second correction amount and the second presentation distance are set as the initial state is presented to the subject's eye, and the case where the first correction amount and the second correction amount are switched is taken as an example. , but it is not limited to this. For example, it is also possible to present to the subject's eye the appearance of the first state in which the first correction amount and the first presentation distance are set as the initial state, and switch between the first correction amount and the second correction amount. As a result, at the far distance of the subject's eye E, the appearance of the target light flux corrected by the first correction amount and the appearance of the target light flux corrected by the second correction amount are examined. people can feel it. The initial state of the appearance presented to the subject's eye is a state in which the target luminous flux is corrected by the second correction amount at the first presentation distance (that is, a state in which the switching button 94b is selected), or a state in which the switching button 94b is selected. A state in which the target beam is corrected by the first correction amount (that is, a state in which the switching button 94c is selected) may be set as the initial state.

In the present embodiment, an example of a case in which a second state of appearance in which a second correction amount and a second presentation distance are set as an initial state is presented to the subject's eye, and the first presentation distance and the second presentation distance are switched. , but it is not limited to this. For example, the appearance of the first state in which the first correction amount and the first presentation distance are set as the initial state may be presented to the subject's eye, and the first presentation distance and the second presentation distance may be switched. As a result, with the target light beam corrected by the first correction amount, the appearance of the test target arranged at the far distance or the near distance, or with the target light beam corrected with the second correction amount, the far distance It is possible to make the examinee feel how the test optotypes arranged at the distance or the near distance are seen.

In this embodiment, switching between the first presentation distance and the second presentation distance may be performed along with the switching between the first correction amount and the second correction amount. That is, the control unit 80 may perform at least one of switching between the first correction amount and the second correction amount, and switching between the first presentation distance and the second presentation distance.

Note that, in this embodiment, by switching the first correction amount and the second correction amount for both the left eye and the right eye of the eye E to be examined, a configuration is taken as an example to present the appearance to the eye E to be examined. has been described, but it is not limited to this. Of course, by switching between the first correction amount and the second correction amount for either the left eye or the right eye of the eye E to be examined, a configuration may be adopted in which the appearance is presented to the eye E to be examined.

In the present embodiment, the configuration for presenting the appearance to the subject's eye E by controlling the eye refractive power measuring unit (corrective optical system) 50 and the distance switching section 20 has been described as an example. Not limited. For example, by displaying a simulation image showing the result of simulating the optotype light flux formed on the fundus of the eye E to be inspected, the appearance may be presented to the eye E to be inspected. In other words, by displaying a simulation image that assumes how the subject's eye E looks at the test optotype corrected by the acquired correction amount, the configuration may be such that the subject's eye E sees how it looks. .

For example, the simulation image is based on the optical characteristics of the eye to be examined E, the amount of correction for correcting the optical characteristics of the eye to be examined E, and the presentation distance of the test optotype. It may be an image obtained by simulating the imaging state of by ray tracing processing. For example, the simulation image may be a simulation image representing how an inspection target looks, or may be a simulation image representing how an everyday scene or the like looks. For example, the simulation image may be displayed on the monitor 107 or an external terminal (such as a tablet terminal), or may be displayed on a head-mounted display using VR (Virtual Reality) technology.

In such a configuration, the control unit 80, when setting is performed to present to the subject's eye the appearance of the first state in which the first correction amount and the first presentation distance are set, the control unit 80 changes the first presentation distance from the first presentation distance to the first presentation distance. By displaying the first simulation image showing the result of simulating the target luminous flux corrected by the amount of correction and formed on the fundus of the eye to be examined, the subject is presented with the appearance in the first state. may Further, when the control unit 80 sets to present to the subject's eye the appearance of the second state in which the second correction amount and the second presentation distance are set, correction is performed by the second correction amount from the second presentation distance. Alternatively, the subject may be presented with how the subject looks in the second state by displaying a second simulation image showing the result of simulating the target light flux formed on the fundus of the subject's eye.

For example, in the optometry apparatus of the present embodiment, when the setting is made to present the appearance of the first state to the eye to be examined, the optotype light flux corrected by the first correction amount is the first By displaying the first simulation image showing the result of simulating the target luminous flux that is projected onto the subject's eye at the presentation distance and formed into an image on the fundus of the subject's eye, the subject can see how the first state looks. This is the configuration to be presented. Further, when setting is made to present the appearance of the second state to the eye to be inspected, the target luminous flux corrected by the second correction amount is projected onto the eye to be inspected at the second presentation distance. By displaying a second simulation image showing the result of simulating the target light flux formed on the fundus of the eye, the subject is presented with the appearance of the second state. As a result, the subject can check the appearance in the simulation image and select a more suitable correction state.

In this embodiment, the appearance of the initial state (that is, the first state in which the first correction amount and the first presentation distance are set, or the second state in which the second correction amount and the second presentation distance are set) and the presentation of the appearance in the state where the first correction amount and the second correction amount are switched may be performed for both eyes of the eye E to be examined, or for one eye of the eye E to be examined may be implemented. For example, when presenting these appearances to both eyes of the subject's eye E, the convergence angle corresponding to the first presentation distance and the convergence angle corresponding to the second presentation distance may be considered. . For example, the optometry apparatus may have a configuration for changing the convergence angle of the target light flux projected onto the eye to be examined E, and may present the appearance based on the convergence angle. Further, for example, when presenting these appearances to one eye of the subject's eye E, the subject's eye on the side not presenting the appearance may be shielded or fogged. That is, the appearance of one subject's eye corrected by either the first correction amount or the second correction amount and the other subject's eye being shielded or fogged may be presented. Note that only the background image of the test optotype may be presented to the eye to be inspected on the side that does not present the appearance.

At least part of the technique illustrated in this embodiment can be applied to an ophthalmologic apparatus having a configuration different from that of the optometric apparatus 1 in this embodiment. For example, the optometric apparatus may be an apparatus capable of measuring the optical characteristics of the eye E to be examined in a state in which the front of the eye E to be examined is open. That is, the optometry apparatus may be an optometry apparatus having measurement means for projecting measurement light beams to both the left eye and the right eye of the subject's eye and measuring the optical characteristics of the subject's eye with both eyes open.

1 Optometry Apparatus 2 Housing 3 Presentation Window 10 Projection Optical System 11 Display 12 Plane Mirror 13 Concave Mirror 20 Perspective Switching Unit 40 Observation Unit 50 Eye Refractive Power Measurement Unit 53 Inspection Window 80 Control Unit

Claims (4)

A first correction amount for correcting the first optical characteristic of the subject's eye measured with the target light beam projected at the first presentation distance, and a second presentation distance at which the target light beam is different from the first presentation distance. an acquisition means for acquiring a second correction amount for correcting the second optical characteristic of the eye to be inspected measured in the projected state at
A first state in which the target light flux corrected by the first correction amount is projected onto the eye to be examined at the first presentation distance, and a second presentation of the target light flux corrected by the second correction amount setting means for setting to present to the subject one of the second state projected onto the subject's eye at a distance;
with
The first presentation distance is the far distance of the eye to be examined, and the second presentation distance is the near distance of the eye to be examined,
The setting means sets at least the first correction amount cylindrical power at the far distance based on the correction amount switching signal in a state in which either the first state or the second state is set. and the astigmatism axis angle , and the cylindrical power and astigmatism axis angle of the second correction amount at the near distance . The optometric device of claim 1,
a light projecting optical system having a target presenting unit for emitting a target light beam, projecting the target light beam emitted from the target presenting unit toward an eye to be inspected; and an optical path of the light projecting optical system. and a corrective optical system arranged to change the optical characteristics of the target light beam,
The setting means
When setting is made to present the appearance of the first state to the eye to be inspected, the correction optical system is controlled to correct the target luminous flux with the first correction amount, and the projection optical system and projecting the target light flux corrected by the first correction amount onto the subject's eye at the first presentation distance, thereby presenting the first state of appearance to the subject. ,
When setting is performed to present the appearance of the second state to the eye to be inspected, the correcting optical system is controlled to correct the target light beam with the second correction amount, and the projecting optical system and projecting the target light beam corrected by the second correction amount onto the eye to be examined at the second presentation distance, thereby presenting the appearance of the second state to the subject. An optometric device characterized by: The optometric device of claim 1,
When setting is performed to present the appearance of the first state to the eye to be inspected, the setting means corrects the target luminous flux corrected by the first correction amount to the target luminous flux at the first presentation distance. By displaying on the display means a first simulation image showing a result of simulating the target luminous flux projected onto the eye to be examined and formed as an image on the fundus of the eye to be examined, the subject can see how the first state looks. presented to
When setting is performed to present the appearance of the second state to the eye to be inspected, the target luminous flux corrected by the second correction amount is projected onto the eye to be inspected at the second presentation distance, By displaying on a display means a second simulation image showing a result of simulating the target light flux formed on the fundus of the subject's eye, the second state of appearance is presented to the subject. Optometry device. In the optometric device according to any one of claims 1 to 3,
The setting means switches between the first presentation distance and the second presentation distance based on a presentation distance switching signal in a state in which either the first state or the second state of appearance is set. An optometry device characterized by carrying out.

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