JP2019177096A - Optometry apparatus - Google Patents

Abstract

To provide an optometry apparatus capable of easily preparing lenses suited to a subject.SOLUTION: The optometry apparatus includes: acquisition means that acquires a first correction quantity for correcting a first optical characteristic of a subject eye measured with a target beam projected at a first presentation distance and a second correction quantity for correcting a second optical characteristic of the subject eye measured with a target beam projected at a second presentation distance different from the first presentation distance; and setting means that is set to present to the subject eye one of visions given in a first state in which a target beam corrected by the first correction quantity is projected onto the subject eye at the first presentation distance and in a second state in which a target beam corrected by the second correction quantity is projected onto the subject eye at the second presentation distance. The setting means switches between the first correction quantity and the second correction quantity by a correction quantity switching signal when one of the sights in the first and second states is set.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to an optometry apparatus that presents how a correction state of an eye to be examined appears.

  An optical member such as a spherical lens or a columnar lens is disposed in front of the subject's eye, and an optical characteristic (for example, refractive power) of the subject's eye is measured by presenting an inspection target via the optical member. An optometry apparatus is known (see Patent Document 1).

JP-A-5-176893

  For example, when producing eyeglasses, a lens for correcting the eye to be examined is prescribed based on the optical characteristics of the eye to be examined acquired using an optometry apparatus. In recent years, changes in optical characteristics at various examination distances such as a far vision state and a near vision state have attracted attention in terms of improving the visual quality of the eye to be examined. Accordingly, it tends to be more preferable to prescribe a lens that is optimal for the optical characteristics of the eye to be examined at each examination distance. However, changing the inspection distance is troublesome, and it is not easy to prescribe an optimal lens by confirming the change in optical characteristics due to the difference in inspection distance.

  In view of the above prior art, it is an object of the present disclosure to provide an optometry apparatus capable of easily prescribing a lens suitable for a subject.

In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) In the optometry apparatus according to the present disclosure, the first correction amount for correcting the first optical characteristic of the eye to be measured measured in a state in which the target luminous flux is projected at the first presentation distance, and the target luminous flux are An acquisition means for acquiring a second correction amount for correcting a second optical characteristic of the eye to be examined, which is measured in a state of being projected at a second presentation distance different from the first presentation distance; and the first correction amount The first state in which the target luminous flux corrected in step 1 is projected onto the eye at the first presentation distance, and the target luminous flux corrected in the second correction amount at the second presentation distance. And setting means for setting the second state projected on the optometry to be presented to the subject in any of the two states, wherein the setting means is either the first state or the second state In the state in which the appearance of is set, based on the correction amount switching signal, the first correction amount and the second correction amount Which comprises carrying out the switching between.

It is an external view of an optometry apparatus. It is a figure explaining the measurement position of an eye refractive power measurement unit. It is the schematic which shows the internal structure of a holding | maintenance unit. It is a figure explaining a light projection optical system. It is the schematic of an observation unit. It is the schematic of an eye refractive power measurement unit. It is a figure which shows the control system of an optometry apparatus. It is an example of the switching screen displayed on a monitor.

<Overview>
One exemplary embodiment will be described with reference to the drawings. 1-8 is a figure explaining the optometry apparatus based on this embodiment. In addition, the items classified by <> below can be used independently or in association with each other.

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

<Acquisition means>
For example, the optometry apparatus includes an acquisition unit (for example, the control unit 80). The acquisition means has a first correction amount for correcting the first optical characteristic of the eye to be measured measured in a state where the target luminous flux is projected at the first presentation distance, and the target luminous flux is different from the first presentation distance. And a second correction amount for correcting the second optical characteristic of the eye to be measured, which is measured while being projected at the second presentation distance.

  For example, the first correction amount is set based on the first optical characteristic of the eye to be examined. That is, the first correction amount may be a correction amount for correcting the spherical power, the columnar power, and the astigmatic axis angle at the first presentation distance of the eye to be examined. For example, the second correction amount is set based on the second optical characteristic of the eye to be examined. That is, the second correction amount may be a correction amount for correcting the spherical power, the columnar power, and the astigmatic axis angle at the second presentation distance of the eye to be examined. Thereby, the correction amount based on the optical characteristics for each presentation distance of the eye to be examined is acquired. In this embodiment, such a correction amount may be a correction power for correcting the column surface power and the astigmatic axis angle in addition to the spherical power. Further, as such correction amount, a correction amount considering the addition power is acquired according to the spherical power in the first optical characteristic and the second optical characteristic of the eye to be examined, the adjusting power of the eye to be examined, age, and the like. Also good.

  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 eye to be examined. 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 eye to be examined. The first presentation distance and the second presentation distance may be different from each other, and both the first presentation distance and the second presentation distance may be a near distance, both an intermediate distance, both a far distance, and the like. . For example, in the present embodiment, 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.

  For example, the first optical characteristic and the second optical characteristic of the eye to be examined are optical characteristics including at least one of spherical power, columnar power, astigmatic axis angle, and the like. Of course, in addition to these optical characteristics, a prism, an oblique amount, and the like may be included. For example, in this embodiment, a first correction amount for correcting the first optical characteristic of the eye to be examined and a second correction amount for correcting the second optical characteristic of the eye to be examined are acquired. In other words, correction amounts such as the spherical power, the columnar power, the astigmatic axis angle, and the like of the eye to be examined are acquired. In the present embodiment, the first correction amount and the second correction amount are correction amounts including at least the column surface frequency and the astigmatic axis angle.

  For example, the acquisition unit switches between the first presentation distance and the second presentation distance using a presentation distance switching unit (for example, the perspective switching unit 20) included in the optometry apparatus, and uses the correction optical system included in the optometry apparatus to examine the eye. The first correction amount and the second correction amount may be acquired by measuring. Of course, the acquisition unit 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 means>
For example, the optometry apparatus includes setting means (for example, the control unit 80). The setting means includes a first state in which the target luminous flux corrected with the first correction amount is projected onto the eye to be examined at the first presentation distance, and the target luminous flux corrected with the second correction amount at the second presentation distance. The subject is presented with one of the second states projected onto the eye under test.

  For example, when the setting means is configured to present the appearance of the first state to the eye to be examined, the correction optical system is controlled to correct the target luminous flux with the first correction amount, and the projection optical system By projecting the target luminous flux corrected with the first correction amount onto the eye to be examined at the first presentation distance, the appearance of the first state may be presented to the subject. Further, for example, when the setting means is configured 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, and the light is projected. The visual state light beam corrected by the second correction amount by controlling the optical system may be projected onto the subject's eye at the second presentation distance, so that the appearance of the second state may be presented to the subject. For example, in such a configuration, the eye to be examined is corrected using the optometry apparatus 1, so that the subject can directly experience the actual appearance with a sense close to normal.

  For example, when the setting means is set to present the appearance of the first state to the eye to be examined, the target luminous flux corrected with the first correction amount is projected onto the eye to be examined at the first presentation distance. Thus, the first simulation image showing the result of simulating the target luminous flux imaged on the fundus of the subject's eye may be displayed on the display means, so that the appearance of the first state may be presented to the subject. Further, for example, when the setting unit is configured to present the appearance of the second state to the eye to be examined, the target luminous flux corrected with the second correction amount is projected onto the eye to be examined at the second presentation distance. Then, the second simulation image showing the result of simulating the target luminous flux imaged on the fundus of the subject's eye may be displayed on the display means, so that the appearance of the second state may be presented to the subject. . In other words, the setting means displays a simulation image that assumes the appearance when the eye to be examined corrected with the obtained correction amount looks at the inspection target, so that the eye can be presented to the eye to be examined. Good. In the case of such a configuration, the subject can experience how it looks indirectly in the simulation image. Note that examples of the display means include a monitor (for example, the monitor 107), an external terminal (for example, a tablet terminal), a head mounted display, and the like included in the optometry apparatus.

  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 where the appearance of either the first state or the second state is set. Also good. In this embodiment, a correction amount switching signal is output in response to an operation instruction from the examiner. For example, when the optometry apparatus has such a configuration, the examiner can select a correction state that is easier to see for the subject, and can prescribe a lens that considers each appearance.

  In the present embodiment, all parameters of the first correction amount and the second correction amount may be switched by the setting means. That is, the parameter included in the first correction amount and the parameter of the second correction amount corresponding to the parameter included in the first correction amount may all be switched. As an example, the spherical power, the columnar power, and the astigmatic axis angle in the first correction amount, and the spherical power, the columnar power, and the astigmatic axis angle in the second correction amount may be switched.

  In the present embodiment, at least some parameters of the first correction amount and the second correction amount may be switched by the setting unit. 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 columnar power and the astigmatic axis angle in the first correction amount and the columnar power and the astigmatic axis angle in the second correction amount may be switched. For example, a progressive lens has fixed values for columnar power and astigmatism axis angle in the distance and near-distance parts, so the correction amount is more suitable for the condition of the subject and the visual environment. It is preferable to correct. For example, when the progressive lens is prescribed by setting at least a part of the parameters of the first correction amount and the second correction amount in this way, the correction more optimal for the subject is performed. The amount can be selected.

  For example, the setting means switches between the first presentation distance and the second presentation distance on the basis of the presentation distance switching signal in a state in which either the first state or the second state is set. Also good. In the present embodiment, a presentation distance switching signal is output in response to an operation instruction from the examiner. For example, the presentation distance switching signal and the correction amount switching signal described above may be output at the same timing or may be output at different timings. As a result, the visual target luminous flux is corrected with the first correction amount, and the inspection target arranged at the first presentation distance or the second presentation distance is viewed, or the visual luminous flux is corrected with the second correction amount. Thus, the subject can feel how the inspection target placed at the first presentation distance or the second presentation distance looks.

  For example, the optometry apparatus includes a presentation distance acquisition unit (for example, the control unit 80). The presentation distance acquisition unit acquires a presentation distance presented to the eye to be examined. For example, such a presentation distance may be a different presentation distance from the first presentation distance and the second presentation distance. Such a presentation distance may be at least one presentation distance. That is, the presentation distance acquisition unit may be configured to acquire one presentation distance different from the first presentation distance and the second presentation distance, or a plurality of presentations different from the first presentation distance and the second presentation distance. The structure which acquires distance may be sufficient.

  For example, in the case of such a configuration, the setting means, in a state where the appearance state of either the first state or the second state is set, based on the presentation distance switching signal, the first presentation distance or the second presentation You may switch from the distance to the presentation distance acquired by the presentation distance acquisition means. Accordingly, the correction amount can be switched in consideration of a presentation distance different from the first presentation distance and the second presentation distance, and various appearances can be presented to the eye to be examined.

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

  FIG. 1 is an external view of an optometry apparatus. FIG. 1A is a perspective view of the optometry apparatus 1 as seen from the front side. FIG. 1B is a perspective view of the optometry apparatus 1 as seen from the back side. For example, the optometry apparatus 1 includes a housing 2, a presentation window 3, a controller 81, a holding unit 4, a light projecting optical system 10, an observation unit 40, an eye refractive power measurement unit (correcting optical system) 50, and the like.

  For example, in the present embodiment, the subject faces the front of the housing 2. The presentation window 3 is used when an examination target is presented to the eye E. The presentation window 3 transmits the target luminous flux by the light projecting optical system 10. For this reason, the target luminous flux is projected onto the eye to be examined through the presentation window 3. When the eye refractive power measurement unit 50 is arranged between the presentation window 3 and the eye E, a target luminous flux is projected onto the eye to be examined through the presentation window 3 and an examination window 53 described later. For example, the presentation window 3 is closed with a transparent panel to prevent entry of dust and the like. 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 types of information (for example, measurement results of the eye E to be examined), various settings (for example, the arrangement of optical elements included in the eye refractive power measurement unit 50, and the display 11 described later). For example, a display screen, etc.) is provided. In this embodiment, the monitor 107 is a touch panel, and the monitor 107 also functions as the switch unit 108. A signal from the controller 81 is input to the control unit 80 via a cable (not shown). Of course, the signal from the controller 81 may be input to the control unit 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 described later. 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 position of the eye refractive power measurement unit 50. 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 to the 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 raised above the housing 2 (see FIG. 1). Such switching between the standby position and the measurement position is performed by moving an arm 30 described later up and down.

  FIG. 3 is a schematic diagram showing the internal configuration of the holding unit 4. In FIG. 3, the 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 driving portion (motor) 6, a shaft 7, a support member 8, and the like.

  The connecting portion 5 rotatably connects the eye refractive power measuring unit 50 around the rotation axis R3. The base 31 is fixedly disposed on the upper surface of the housing 2. The arm 30 is rotatably attached to the base 31 around the rotation axis R2. A motor 6 is fixed to the arm 30. The motor 6 is connected to the upper part of the shaft 7. The lower portion of the shaft 7 is a screw 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 spiral direction of the screw portion and expands and contracts with respect to the support member 8. That is, the portion of the shaft 7 protruding from the support member 8 becomes longer or shorter depending on the rotation direction of the motor 6. For example, when the shaft 7 contracts (when the portion protruding from the support member 8 becomes longer), the support member 8 rotates in the direction of arrow A about the rotation axis R1. At this time, the shaft 7 also rotates in the arrow A direction around 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 arrow A about the rotation axis R2. As a result, the arm 30 and the connecting portion 5 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 extends (when the portion protruding from the support member 8 becomes shorter), the support member 8 rotates in the direction of arrow B about the rotation axis R1. At this time, the shaft 7 also rotates in the arrow B direction around 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. As a result, the arm 30 and the connecting portion 5 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 the present embodiment, the eye refractive power measurement unit 50 held by the holding unit 4 can be switched between the measurement position and the standby position by moving the arm 30 up and down with respect to the housing 2 in this way. it can. In the present 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.

<Projection optics>
The light projecting optical system 10 has a target presenting unit that emits a target light beam, and projects the target light beam emitted from the target presenting unit toward the eye E to be examined. In the present embodiment, a display 11 described later is used as the optotype presenting unit. The light projecting optical system 10 is housed inside the housing 2.

  4 is a view of the projection optical system 10 as viewed from the right side of the optometer 1 (in the direction of arrow C in FIG. 1). FIG. 4A shows an optical arrangement at the time of far-inspection. FIG. 4B shows an optical arrangement at the time of near-field inspection. For example, the light projecting optical system 10 includes a display 11, a plane mirror 12, a concave mirror 13, a perspective switching unit 20, and the like.

  The display 11 displays an inspection target (for example, a Landolt ring target, a fixation target, etc.). The display 11 emits a target luminous flux. The test light flux emitted from the display 11 forms an image on the fundus of the eye E, so that the test eye displayed on the display 11 is presented to the eye E. 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 the control unit 80 described later.

  For example, during the distance test shown in FIG. 4A, the display screen of the display 11 faces the back side of the housing 2 and the target luminous flux is emitted from the display 11 toward the back side. The target luminous flux may be emitted from the display 11 in the horizontal direction (Z direction) or may be emitted in the oblique direction (YZ direction). For example, in the near-field inspection shown in FIG. 4B, the target luminous flux is emitted from the display 11 toward the upper side with the display screen of the display 11 facing upward. The target luminous 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 luminous flux emitted from the display 11 is projected toward the eye E.

  The plane mirror 12 reflects the target luminous flux emitted from the display 11 and guides it to the concave mirror 13. The plane mirror 12 reflects the target luminous flux emitted from the display 11 and guides it to the eye E to be examined. For example, the flat mirror 12 is mirror-coated only on the lower part (solid line part of the flat mirror 12 shown in FIG. 4), and the upper part (dotted line part of the flat mirror 12 shown in FIG. 4) is mirror-coated. It has not been. For this reason, the upper part of the plane mirror 12 in the present embodiment is transparent.

  For example, the focal length of the flat mirror 12 is designed so that the distance from the eye E to the display 11 (that is, the presentation distance) is optically 40 cm during near-field inspection. In addition, although the structure which used the plane mirror is illustrated in a present Example, it is not limited to this. For example, a configuration using a reflecting member such as a prism, a beam splitter, and a half mirror may be used. That is, it is only necessary that the target luminous flux can be reflected.

  The concave mirror 13 reflects the target luminous flux emitted from the display 11 and guides it to the flat mirror 12. For example, the concave mirror 13 sets the presentation distance of the inspection target displayed on the display 11 as the distance inspection distance. For example, the focal length of the concave mirror 13 is designed so that the distance from the eye E to the display 11 is optically 5 m during the distance examination. In the present embodiment, the configuration using the concave mirror 13 is illustrated, but the present invention is not limited to this. For example, a configuration using a reflecting member such as an aspherical mirror or a free-form surface mirror may be used. For example, it is good also as a structure using a lens. For example, in this case, the target luminous flux emitted from the display 11 may be projected onto the eye E through the lens, and the lens may be designed so that the presentation distance is optically 5 m.

  For example, in the distance examination shown in FIG. 4A, the target luminous flux that is emitted from the display 11 and passes through the optical member 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. Is done. That is, the target luminous flux emitted from the display 11 enters the flat mirror 12 through the optical axis L1, 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 luminous flux enters the flat mirror 12 and is reflected in the direction of the optical axis L4. Thereby, the target luminous flux is projected onto the eye E. Further, for example, in the near-field examination shown in FIG. 4B, the target luminous flux emitted from the display 11 and reflected by the flat mirror 12 is projected onto the eye E to be examined. That is, the target luminous flux emitted from the display 11 is incident on the plane mirror 12 through the optical axis L3, reflected in the direction of the optical axis L4, and projected onto the eye E. For example, the light projecting optical system 10 emits the target luminous flux from the inside of the housing 2 to the outside in this way.

<Perspective switch>
The distance switching unit 20 changes the position of the display 11 between the distance inspection and the near inspection. For example, the perspective switching unit 20 includes a holding unit 21, a gear 22, a motor 23, and the like. The holding unit 21 holds the display 11. For example, the gear 22 includes 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 motor 23 is connected to the worm part 24, and the holding part 21 is connected to the wheel part 25. For example, the drive of the motor 23 causes the worm portion 24 to rotate, and accordingly, the wheel portion 25 rotates 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 obstruct the target luminous flux from the display 11 toward the eye E. For example, the perspective switching unit 20 moves the display 11 together with the holding unit 21 in this way, and switches the distance of the test target displayed on the display 11 between the distance test and the near test.

<Observation unit>
The observation unit 40 is used for observing the positional relationship between the eye E and the eye refractive power measurement unit 50. FIG. 5 is a schematic diagram of the observation unit 40. For example, the observation unit 40 includes an observation window 41, a shielding part 42 (see FIG. 4), a cover 43, a hinge 44, and the like. Note that the observation unit 40 may be configured to include at least the observation window 41. The 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 for observing the positional relationship between the eye E and the eye refractive power measurement unit 50 from the outside of the housing 2 through the presentation window 3. For example, the observation window 41 in this embodiment is arranged at a position where the pupil position of the eye E can be confirmed from the examiner's eye OE. For example, when the examiner looks into the observation window 41, a region in the plane mirror 12 through which the examiner's line of sight passes is formed so that the plane mirror 12 does not block the examiner's line of sight. The shielding unit 42 prevents the target luminous flux from the light projecting optical system 10 from entering the observation window 41. For example, the shielding part 42 is a transparent part of the flat mirror 12 (part where the mirror coat is not applied).
And the mirror part (part where the mirror coat is applied).

  For example, the eye refractive power measurement unit 50 at the measurement position is disposed in the vicinity of the housing 2. In this embodiment, the distance W (see FIG. 5) from the examination window 53 to the presentation window 3 provided in the eye refractive power measurement unit 50 is designed to be about 135 mm. For this reason, the examiner cannot put his head between the eye refractive power measurement unit 50 and the housing 2, and it becomes difficult to observe the positional relationship between the eye E and the eye refractive power measurement unit 50. For example, the observation unit 40 can be used effectively in the case of the present embodiment where the distance W is shorter than the head length of the examiner.

<Eye refractive power measurement unit (correction optics)>
The eye refractive power measurement unit 50 is disposed in the optical path of the light projecting optical system 10 and changes the optical characteristics of the target luminous flux. FIG. 6 is a schematic diagram of the eye refractive power measurement unit 50. For example, the eye refractive power measurement unit includes a forehead 51, a pair of left and right lens chamber units 52, an inspection window 53, a driving unit 54, a driving unit 55, a moving unit 56, a cornea position aiming optical system 60, and the like. The forehead support 51 keeps the distance between the eye E and the eye refractive power measurement unit 50 constant by bringing the forehead of the subject into contact.

  The lens chamber unit 52 switches and arranges optical elements in the inspection window 53. For example, a lens disk 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 rotation of the lens disk 57 is controlled by the drive unit 54 (actuator or the like). Thereby, the optical element desired by the examiner is arranged in the inspection window 53. For example, the rotation of the optical element disposed in the inspection window 53 is controlled by a drive unit 55 (motor, solenoid, etc.). As a result, the optical element is arranged in the inspection window 53 at a rotation angle desired by the examiner.

  For example, the lens disk 57 includes one lens disk or a plurality of lens disks. For example, when a plurality of lens disks (lens disk group) are provided, a driving unit corresponding to each lens disk is provided. For example, each lens disk of the lens disk group includes an aperture (or a 0D lens) and a plurality of optical elements. Typical types of each lens disk are a spherical lens disk having a plurality of spherical lenses having different powers, a cylindrical lens disk having a plurality of cylindrical lenses having different powers, an auxiliary lens disk, and the like. In addition, the lens disk in the present embodiment includes an alignment lens with a crosshair. For example, at least one of a red filter / green filter, a prism, a cross cylinder lens, a polarization lens, a Madox lens, and an auto cross cylinder lens is disposed on the auxiliary lens disk. For the detailed configuration of the lens disk 57, refer to, for example, Japanese Patent Application Laid-Open Nos. 2007-68574 and 2011-72431.

  For example, the moving unit 56 adjusts the interval between the lens chamber units 52. For example, the distance between the left and right lens chamber units is adjusted by the drive unit 58 having a slide mechanism. Thereby, the interval of the examination window 53 can be changed in accordance with the interpupillary distance of the eye to be examined. Further, the moving unit 56 adjusts the convergence angle (inner approach angle) of the left and right lens chamber units. For example, the convergence angle of the left and right lens chamber units is adjusted by the drive unit 59 having a convergence mechanism. For the detailed configuration of the moving unit 56, refer to Japanese Patent Application Laid-Open No. 2004-329345.

  The corneal position aiming optical system 60 is used to confirm the distance between the corneal apexes of the eye E and the reference position when the lens is worn. For example, the cornea position aiming optical system 60 is disposed inside the eye refractive power measurement unit 50 and is provided in each of the left and right lens chamber units 52. For the detailed configuration of the cornea position aiming optical system 60, refer to, for example, Japanese Patent Application Laid-Open No. 2004-229769.

  The eye refractive power measurement unit 50 is not limited to the above configuration. For example, the eye refractive power measurement unit 50 may be configured to change the optical characteristics (for example, at least one of spherical power, cylindrical power, astigmatic axis angle, polarization characteristics, aberration amount, etc.) of the target luminous flux. 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 unit>
FIG. 7 is a diagram illustrating a control system of the optometry apparatus 1. For example, the control unit 80 includes a CPU (processor), a RAM, a ROM, and the like. The CPU controls driving of each unit in the ophthalmic apparatus 100. The RAM temporarily stores various information. Various programs executed by the CPU are stored in the ROM. The control unit 80 may be configured by a plurality of control units (that is, a plurality of processors).

  The control unit 80 is connected to the display 11, the controller 81, the nonvolatile memory 82 (hereinafter, memory 82), and the like. The control unit 80 includes a motor 6 included in the holding unit 4, a motor 23 included in the perspective switching unit 20, and drive units (drive units 54, 55, 58, 59) included 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 contents even when power supply is interrupted. For example, as the memory 82, a hard disk drive, a flash ROM, a removable USB memory, or the like can be used. The memory 82 may store an inspection target (for example, a Landolt ring target having a visual acuity value of 0.1 to 2.0) and the like.

<Control action>
The control operation of the optometry apparatus 1 will be described.

  The optometry apparatus 1 includes a first correction amount for correcting the first optical characteristic when the test target is arranged at the first presentation distance as a correction amount for correcting the optical characteristic of the eye E, and the test target. And a second correction amount that corrects the second optical characteristic when arranged at a second presentation distance different from the first presentation distance. In the present embodiment, the first correction amount and the second correction amount are acquired by performing subjective measurement on the eye E using the optometry apparatus 1.

  In the following, the first optical characteristic of the eye E measured as the first presentation distance is measured with the test target placed at a distance far away from the eye E and the target luminous flux is projected at the first presentation distance. The case where the 1st correction amount to correct is acquired is illustrated. In the following description, as the second presentation distance, the test optical target is measured in a state in which the examination target is arranged at a near distance of the eye E and the target luminous flux is projected at the second presentation distance. The case where the 2nd correction amount which corrects a characteristic is acquired is illustrated.

<Acquisition of first correction amount>
First, a distance test for the eye E 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 distance switching unit 20 and sets the display 11 to the arrangement position at the time of the distance inspection. Thereby, the presenting distance of the test target with respect to the eye E is set to the first presenting distance that is the far distance of the eye E.

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

  When the alignment between the eye E and the eye refractive power measurement unit 50 is completed, the examiner starts subjective measurement of the eye E. The examiner operates the operation unit 108 to display an inspection target (for example, a Landolt target having a visual acuity value of 1.0, etc.) on the display 11. In response to an input signal from the controller 81, the control unit 80 calls a corresponding test target from the memory 82 and controls the display screen of the display 11. The test eye E displayed on the display 11 is presented to the eye E through the examination window 53 and the presentation window 3.

  For example, in the subjective measurement, the eye refractive power of the eye E is corrected to 0D based on the objective eye refractive power (objective value) obtained by the objective measurement using an ophthalmologic apparatus or the like. As described above, the optical element of the lens disk 57 arranged in the inspection window 53 is controlled. The control unit 80 controls the driving unit 54 to rotate the spherical lens disk and the cylindrical lens disk, thereby correcting the spherical power and the column surface power of the eye E. Further, the control unit 80 corrects the astigmatic axis angle of the eye E by controlling the driving unit 55 to rotate the optical element. Thereby, the correction amount for setting the eye refractive power of the eye E to be 0D is acquired. That is, the spherical power, the columnar power, and the astigmatic axis angle for obtaining the eye refractive power of the eye E to be 0D are acquired. The control unit 80 may control the lens disk 57 so as to correct the eye refractive power of the eye E to be other than 0D (for example, −1D or the like).

  Subsequently, the examiner switches the inspection target to be displayed on the display 11 and confirms whether the correction amount is appropriate for the subject. For example, the examiner asks the examinee the direction of the clearance of the Landolt ring target, and if the subject's answer is a correct answer, the examiner switches to a test target whose visual acuity value is one step higher. In the case of an incorrect answer, the eyesight value is switched to a test target that is one step lower. The control unit 80 switches the inspection target to be displayed on the display 11 as needed based on a signal for changing the inspection target input from the operation unit 108. If the correction amount is not appropriate for the subject, the examiner changes the correction amount by operating the operation unit 108, and determines whether the corrected correction amount is appropriate for the subject. You may judge.

  For example, as described above, the first optical characteristic of the eye E is measured in a state where the target luminous flux is projected at the first presentation distance (that is, in the state where the examination target is presented from the first presentation distance), and the test is performed. A first correction amount for correcting the first optical characteristic is acquired based on the correction amount in a state determined by the person as appropriate. For example, the first correction amount is acquired for each of the left eye and the right eye. The control unit 80 stores the first correction amounts of the left and right eyes acquired at the first presentation distance in the memory 82.

<Acquisition of second correction amount>
Subsequently, a near-field inspection for the eye E is performed. The examiner operates the operation unit 108 to control the perspective switching unit 20 and sets the display 11 to the arrangement position at the near-field inspection. Thereby, the presentation distance of the test target for the eye E is set to the second presentation distance that is the near distance of the eye E. For example, the control unit 80 measures the second optical characteristic of the eye E with the target luminous flux projected at the second presentation distance (that is, with the examination target presented from the second presentation distance), A second correction amount for correcting the second optical characteristic is acquired. Since the second correction amount can be obtained in the same manner as the first correction amount, description thereof is omitted. For example, when acquiring the second correction amounts for the left eye and the right eye, the control unit 80 stores them in the memory 82.

  Here, for example, when prescribing a progressive lens to a subject, the appearance of the eye E corrected with the first correction amount and the state of the eye E corrected with the second correction amount are visible. It may be better to consider the condition. The progressive lens has a fixed column surface power and astigmatism axis angle in the distance and near distance parts, so correct with a more appropriate correction amount according to the appearance of the subject and the visual environment. It is preferable. For this reason, in this embodiment, the state in which the eye E is corrected with the first correction amount and the second correction amount is switched, and the respective appearances are presented to the eye E. This will be described below.

<Initial setting>
For example, when the examiner acquires the first correction amount and the second correction amount of the eye E, the examiner sets an initial state for showing how the eye E looks. The control unit 80 presents the first state in which the target luminous flux corrected with the first correction amount is projected onto the eye to be examined at the first presentation distance, and the second target luminous flux corrected with the second correction amount. One of the appearances of the second state projected onto the subject's eye at a distance is presented to the subject. For example, the appearance in each state may be directly experienced by the subject by correcting the eye E, or may be indirectly experienced by using a simulation image or the like. It may be. Hereinafter, a case where the appearance of the second state is presented using the optometry apparatus 1 will be described 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 may select a switching button 94d described later. When the setting for presenting the appearance of the second state to the eye to be examined is performed, the control unit 80 controls the light projecting optical system 10 to operate the perspective switching unit 20 to move the arrangement position of the display 11 to the near distance. And switch. In addition, the control unit 80 controls the eye refractive power measurement unit (correction optical system) 50 to switch the optical element of the lens disk 57, and corrects the target luminous flux emitted from the display 11 with the second correction amount. By projecting the target luminous flux corrected by the second correction amount from the second presentation distance onto the eye E, it is possible to present the appearance of the second state to the eye E.

  Note that the initial state for presenting the appearance to the eye E may be configured such that the examiner selects the first state or the second state as in this embodiment. With the acquisition of the first correction amount and the second correction amount, any of preset states may be automatically selected.

<Switching correction amount>
FIG. 8 is an example of the switching screen 90 displayed on the monitor 107. For example, on the switching screen 90, the first optical characteristic 91 of the eye E acquired at the first presentation distance (far distance in this embodiment), the second presentation distance (near distance in this embodiment). The second optical characteristic 92 of the eye E acquired in step S2, the mark 93 schematically representing the presentation distance of the examination target, the switching button 94 for switching the appearance of the eye E, and the like are displayed. For example, the switching button 94 projects the target luminous flux corrected with the first correction amount from the first presentation distance (that is, presents the appearance of the first state), and switches from the first presentation distance to the first presentation distance. The switch button 94b for projecting the target luminous flux corrected with the second correction amount, the switch button 94c for projecting the target luminous flux corrected with the first correction amount from the second presentation distance, and the second button from the second presentation distance. It may be configured by a switch button 94d that projects the target luminous flux corrected by the two correction amounts (that is, presents the appearance of the second state).

  For example, the examiner operates the monitor 107 to set the first correction amount to the second state in which the second correction amount and the second presentation distance are set as the initial state for presenting the appearance to the eye E. 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. Based on the correction amount switching signal, the control unit 80 sets the first correction amount and the second correction amount. Perform switching. For example, when the examiner selects the switching button 94c, the control unit 80 switches the optical element of the lens disk 57, and projects the target luminous flux corrected with the first correction amount onto the eye E. That is, the eye E visually recognizes the inspection target while being corrected with the first correction amount. For example, when the examiner operates the switching button 94d, the control unit 80 switches the optical element of the lens disk 57 and projects the target luminous flux corrected with the second correction amount. That is, the eye E visually recognizes the inspection target while being corrected with the second correction amount.

  At this time, the examiner may switch the first correction amount and the second correction amount while operating the operation unit 108 and presenting the test target such as the Landolt ring target to the eye E. Further, the examiner may determine the visual acuity value of the eye E by asking the subject how much the examination target is visible. For example, the visual acuity value determined by the examiner can be input and may be 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 the second state in which the second correction amount and the second presentation distance are set are stored when the subjective measurement is performed. This may be displayed using the measured result.

  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 replied that it is easy to see the state corrected with the first correction amount, the first correction amount may be used as the prescription value of the lens. For example, when the subject replied that it is easy to see the state corrected with the second correction amount, the second correction amount may be used as the prescription value of the lens. This makes it possible to prescribe a lens more suitable for the subject.

<Switching the presentation distance>
For example, although the 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 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. The first presentation distance and the second presentation distance are switched. 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 the control unit 80 performs the first presentation based on the presentation distance switching signal. Switching between the distance and the second presentation distance is performed.

  For example, when the examiner selects the switching button 94b, the control unit 80 operates the perspective switching unit 20 to project the target luminous flux from the first presentation distance to the eye E to be examined. That is, the eye E visually recognizes the inspection target arranged at the first presentation distance. For example, when the examiner operates the switching button 94d, the control unit 80 operates the perspective switching unit 20 to project the target luminous flux from the second presentation distance. In other words, the eye E visually recognizes the inspection target placed at the second presentation distance.

  As a result, when the eye E is corrected with the first correction amount, the distance and the near distance are visible, or when the eye E is corrected with the second correction amount, the distance and the near distance are corrected. You can check how it looks on the screen. For example, the subject can experience how the appearance at the far distance changes when the correction amount at the near distance is emphasized.

  As described above, for example, the optometry apparatus in the present embodiment includes the first correction amount for correcting the first optical characteristic of the eye to be measured measured in a state where the target light beam is projected at the first presentation distance; A second correction amount for correcting the second optical characteristic of the eye to be measured, which is measured in a state where the target luminous flux is projected at a second presentation distance different from the first presentation distance, is acquired. Further, the optometry apparatus in the present embodiment includes a first state in which the target luminous flux corrected with the first correction amount is projected onto the eye to be examined at the first presentation distance, and the target corrected with the second correction amount. It is set so that either the second state in which the luminous flux is projected onto the eye to be examined at the second presentation distance is presented to the subject, and further the appearance of either the first state or the second state In the state where the method is set, the first correction amount and the second correction amount are switched based on the correction amount switching signal. Thus, the examiner can select a state that is easier to see for the subject, and can prescribe a lens in consideration of the appearance.

  Further, for example, the optometry apparatus in the present embodiment corrects the target luminous flux with the first correction amount by controlling the correction optical system when the setting of presenting the appearance of the first state to the eye to be examined is performed. At the same time, the projection optical system is controlled to project the target luminous flux corrected with the first correction amount onto the eye to be examined at the first presentation distance, so that the appearance of the first state is presented to the subject. To do. Further, for example, when the setting of presenting the appearance of the second state to the eye to be examined is performed, the optometry apparatus according to the present embodiment controls the correction optical system 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 luminous flux corrected with 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. . Thus, the subject can experience the actual appearance with a sense close to normal and can select a more suitable correction state.

  In addition, for example, the optometry apparatus according to the present embodiment has 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 is set. Switch. As a result, the visual target luminous flux is corrected with the first correction amount, and the inspection target arranged at the first presentation distance or the second presentation distance is viewed, or the visual luminous flux is corrected with the second correction amount. Thus, the subject can feel how the inspection target placed at the first presentation distance or the second presentation distance looks.

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

  In addition, although the optometry apparatus 1 is a structure which can set a test | inspection target to either the distance 5m and the near distance 40cm, it is good also as a structure which can set arbitrary presentation distance. In this case, the control unit 80 may acquire the presentation distance of the examination target presented to the eye E. In other words, the control unit 80 may acquire a presentation distance (hereinafter, a third presentation distance) different from the first presentation distance and the second presentation distance. For example, the control unit 80 changes 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 is set. Switching may be performed. The presenting distance different from the first presenting distance and the second presenting distance may be a plurality of presenting distances, and the third presenting distance, the fourth presenting distance,... May be.

  For example, the optometry apparatus according to the present embodiment acquires the presentation distance presented to the eye to be examined in this way, and the presentation distance switching signal is obtained in a state in which one of the first state and the second state is set. Is switched from the first presentation distance or the second presentation distance to the third presentation distance. Accordingly, the correction amount is switched in consideration of the third presentation distance different from the first presentation distance and the second presentation distance, and various appearances can be presented to the eye to be examined. As an example, when the first presentation distance and the second presentation distance are the far distance and the near distance, respectively, the appearance at the intermediate distance can be presented as the third presentation distance.

  In the present embodiment, the configuration for switching all the parameters (that is, the spherical power, the columnar power, the astigmatic axis angle, etc.) in the first correction amount and the second correction amount has been described as an example. It is not limited. For example, a configuration in which at least some parameters in the first correction amount and the second correction amount are switched may be used. That is, in the present 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 column surface frequency and the astigmatic axis angle, and the column surface frequency and the astigmatic axis angle in the first correction amount and the second correction amount. The columnar surface power and the astigmatic axis angle may be switched.

  For example, the optometry apparatus in the present embodiment thus switches 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 do. Accordingly, for example, when a progressive lens is prescribed, a more optimal correction amount can be selected. As an example, a more suitable lens can be prescribed by confirming the appearance of the spherical power set to the first correction amount and the columnar power and the astigmatic axis angle set to the second correction amount. .

  In this embodiment, an example is shown in which the appearance of the second state in which the second correction amount and the second presentation distance are set as the initial state is presented to the eye to be examined, and the first correction amount and the second correction amount are switched. However, the present invention 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 eye to be examined, and the first correction amount and the second correction amount may be switched. As a result, at the distance of the eye E to be examined, the appearance of the state in which the target luminous flux is corrected by the first correction amount and the appearance of the state in which the target luminous flux is corrected by the second correction amount are respectively examined. People can feel. Note that the initial state of appearance presented to the eye to be inspected is a state in which the target luminous flux is corrected with the second correction amount at the first presentation distance (that is, a state in which the switching button 94b is selected), or a view at the second presentation distance. A state in which the standard luminous flux is corrected with the first correction amount (that is, the state in which the switching button 94c is selected) may be set as the initial state.

  In the present embodiment, an example is shown in which the appearance of the second state in which the second correction amount and the second presentation distance are set as the initial state is presented to the eye to be examined, and the first presentation distance and the second presentation distance are switched. However, the present invention 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 eye to be examined, and the first presentation distance and the second presentation distance may be switched. As a result, the visual target luminous flux is corrected with the first correction amount, and the inspection target arranged at a distant or near distance is viewed, or the visual luminous flux is corrected with the second correction amount, Each subject can feel how the inspection target placed at a distance or near distance looks.

  In the present embodiment, switching between the first presentation distance and the second presentation distance may be performed together with 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.

  In the present embodiment, a configuration in which the eye E appears as an example by switching the first correction amount and the second correction amount for both the left eye and the right eye of the eye E is taken as an example. However, the present invention is not limited to this. Of course, it is good also as a structure which shows the appearance to the eye E to be examined by switching the 1st correction amount and the 2nd correction amount with respect to any one of the left eye and the right eye of the eye E to be examined.

  In addition, although the present Example demonstrated and demonstrated the structure which shows the appearance to the eye E to be examined by controlling the eye refractive power measurement unit (correction optical system) 50 and the perspective switching unit 20, It is not limited. For example, it is good also as a structure which shows the appearance to the eye E to be examined by displaying the simulation image which shows the result of having simulated the target light beam imaged on the fundus of the eye E to be examined. In other words, the eye E corrected by the acquired correction amount may display a simulation image assuming how the eye E looks when the inspection target is viewed, so that the eye E may be displayed. .

  For example, the simulation image includes a target luminous flux in the fundus of the eye E based on the optical characteristics of the eye E, the correction amount for correcting the optical characteristics of the eye E, and the presentation distance of the test target. The imaging state may be an image that is simulated by a ray tracing process. For example, the simulation image may be a simulation image that represents the appearance of the inspection target, or may be a simulation image that represents the appearance of an everyday landscape or the like. For example, the simulation image may be displayed on the monitor 107 or an external terminal (for example, a tablet terminal), or may be displayed on a head-mounted display using VR (Virtual Reality) technology.

  In the case of such a configuration, when the setting of presenting the appearance of the first state in which the first correction amount and the first presentation distance are set to the eye to be examined is performed, the control unit 80 starts from the first presentation distance. By displaying the first simulation image showing the result of simulating the target luminous flux corrected with the correction amount and imaged on the fundus of the subject's eye, the appearance in the first state is presented to the subject. May be. In addition, when the setting of presenting the appearance of the second state in which the second correction amount and the second presentation distance are set to the eye to be examined is performed, the control unit 80 corrects the second correction amount from the second presentation distance by the second correction amount. By displaying a second simulation image showing the result of simulating the target luminous flux imaged on the fundus of the subject's eye, the appearance in the second state may be presented to the subject.

  For example, in the optometry apparatus according to the present embodiment, when the setting for presenting the appearance of the first state to the eye to be examined is performed in this way, the target luminous flux corrected with the first correction amount is the first. By displaying a first simulation image showing the result of simulating the target luminous flux projected onto the eye to be examined at the presented distance and imaged on the fundus of the eye to be examined, the appearance of the first state is displayed to the subject. It is a configuration to present. In addition, when setting to present the appearance of the second state to the eye to be examined is performed, the target luminous flux corrected with the second correction amount is projected onto the eye to be examined at the second presentation distance, and the eye to be examined By displaying a second simulation image showing the result of simulating the target luminous flux imaged on the fundus of the eye, the appearance of the second state is presented to the subject. As a result, the subject can confirm the appearance with the simulation image and can select a more suitable correction state.

  In this embodiment, 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) is visible. And the presentation of the appearance in a state where the first correction amount and the second correction amount are switched may be performed for both eyes of the eye E or for one eye of the eye E May be implemented. For example, when these appearances are presented to both eyes of the eye E, the convergence angle corresponding to the first presentation distance and the convergence angle corresponding to the second presentation distance may be considered, respectively. . For example, the optometry apparatus may include a configuration for changing the convergence angle of the target luminous flux projected to the eye E, and present the appearance based on the convergence angle. Further, for example, when presenting these appearances to one eye of the eye E, the eye to be examined on the side that does not present the appearance may be shielded or clouded. That is, the appearance by one eye to be corrected with either the first correction amount or the second correction amount and the other eye to be shielded or clouded may be presented. In addition, it is good also as a structure which shows only the background image of a test | inspection target with respect to the to-be-examined eye which does not show how to look.

  It should be noted that at least a part of the technique exemplified in this embodiment can be applied to an ophthalmologic apparatus having a configuration different from that of the optometry apparatus 1 in this embodiment. For example, the optometry apparatus may be an apparatus that can measure the optical characteristics of the eye E with the front of the eye E open. In other words, the optometry apparatus may be an optometry apparatus that includes measurement means for projecting the measurement light beam to both the left eye and the right eye of the eye to be examined and measuring the optical characteristics of the eye to be examined in the open state of both eyes.

DESCRIPTION OF SYMBOLS 1 Optometry apparatus 2 Housing 3 Presentation window 10 Projection optical system 11 Display 12 Plane mirror 13 Concave mirror 20 Perspective switching part 40 Observation unit 50 Eye refractive power measurement unit 53 Examination window 80 Control part

Claims (8)

A first correction amount for correcting the first optical characteristic of the eye to be measured measured in a state where the target luminous flux is projected at the first presentation distance, and a second presentation distance in which the target luminous flux is different from the first presentation distance. Obtaining means for obtaining a second correction amount for correcting the second optical characteristic of the eye to be examined measured in a state projected at
A first state in which the target luminous flux corrected with the first correction amount is projected onto the eye to be examined at the first presentation distance, and the target luminous flux corrected with the second correction amount is the second presentation. Setting means for setting the second state projected on the eye to be examined at a distance so as to present to the subject one of the appearances;
With
The setting means switches between the first correction amount and the second correction amount based on a correction amount switching signal in a state where the appearance of either the first state or the second state is set. An optometry apparatus characterized by being implemented.
The optometry apparatus of claim 1,
A light projecting optical system for projecting the target light beam emitted from the target presenting unit toward the eye to be examined; and an optical path of the light projecting optical system. An optometry apparatus that is disposed and has a correction optical system that changes an optical characteristic of the target luminous flux,
The setting means includes
When the setting for presenting the appearance of the first state to the eye to be examined is performed, the correction optical system is controlled to correct the target luminous flux by the first correction amount, and the light projecting optical system By projecting the target luminous flux corrected with the first correction amount onto the eye to be examined at the first presentation distance, the way the first state appears is presented to the subject. ,
When the setting of presenting the appearance of the second state to the eye to be examined is performed, the correction optical system is controlled to correct the target luminous flux by the second correction amount, and the light projecting optical system By projecting the target luminous flux corrected by the second correction amount onto the eye to be examined at the second presentation distance, the appearance of the second state is presented to the subject. An optometry apparatus characterized by that.
The optometry apparatus of claim 1,
When the setting means is configured to present the appearance of the first state to the eye to be inspected, the target luminous flux corrected with the first correction amount is applied to the subject 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 and imaged on the fundus of the eye to be examined, the appearance of the first state is displayed on the subject. To present
When the setting for presenting the appearance of the second state to the eye to be examined is performed, the target luminous flux corrected with the second correction amount is projected onto the eye to be examined at the second presentation distance, Displaying the second simulation image showing the result of simulating the target luminous flux imaged on the fundus of the subject's eye on the display means to present the subject with the appearance of the second state. Optometry device.
In the optometry apparatus in any one of Claims 1-3,
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 is set. An optometry apparatus characterized by being implemented.
In the optometry apparatus in any one of Claims 1-4,
The optometry apparatus, wherein the setting means switches 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. .
In the optometry apparatus in any one of Claims 1-5,
The optometry apparatus, wherein the first correction amount and the second correction amount include at least a column surface power and an astigmatic axis angle.
In the optometry apparatus in any one of Claims 1-6,
A presentation distance obtaining means for obtaining a presentation distance presented to the eye to be examined;
The setting means, based on the presentation distance switching signal, from the first presentation distance or the second presentation distance in a state where the appearance state of either the first state or the second state is set, An optometry apparatus that switches to the presentation distance acquired by the presentation distance acquisition means.
In the optometry apparatus in any one of Claims 1-7,
The optometry apparatus, wherein the first presentation distance is a distant distance of the eye to be examined, and the second presentation distance is a near distance of the eye to be examined.