Subjective optometry device and subjective optometry program

Abstract

To provide a subjective optometric device and a subjective optometric program that allow a cross cylinder examination for an eye to be examined to be executed easily.SOLUTION: A subjective optometric device for subjectively measuring astigmatic characteristics of an eye to be examined is equipped with target presentation means for presenting an examination target to the eye to be examined, an auto cross cylinder leans for separately presenting the examination target to the eye to be examined, and drive control means for controlling the drive of the auto cross cylinder lens, and changing the border of a separation region where the examination target is separated through the auto cross cylinder lens. The subjective optometric device includes answer input means for inputting an answer of a subject who visually recognizes the examination target, acquisition means for acquiring astigmatic characteristics of the eye to be examined on the basis of an answer input direction indicating the direction that the answer is input by the answer input means, and reception changing means for changing a reception direction of the answer input direction for the acquisition means to acquire the astigmatic characteristics on the basis of the change in the border of the separation region by the drive control means.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a subjective optometry device and a subjective optometry program for subjectively measuring astigmatism characteristics of a subject's eye. [Background technology]

[0002] There is known a subjective optometry device that measures the optical characteristics of a subject's eye by placing an optical element in front of the subject's eye and presenting a test target to the subject's eye via the optical element (see Patent Document 1). For example, by using such a subjective optometry device to perform a cross cylinder test on the subject's eye, the astigmatism characteristics of the subject's eye can be measured.

[0003] In the cross cylinder test, the autocross cylinder method may be used, in which the subject's field of vision is separated by an autocross cylinder lens and two test targets are viewed simultaneously. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 5-176893 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventionally, the test was conducted by the examiner being present with the examinee and asking the examinee which direction of the test target was clearly visible. For example, the examiner guided the examinee's answer by asking questions, and even if the examinee was unsure of the answer, the examiner could verbally guide the examinee to make it easier for him or her to select the direction of the test target.

[0006] However, recently, so-called self-eye examination, in which the examinee proceeds with the eye examination by himself (i.e., operates the controller by himself), has been considered as a mechanism for easily performing subjective examination of the examinee's eye. When applying the auto cross cylinder method to self-eye examination, it was noticed that, depending on the state of the test optotype separated (for example, the state where the test optotype is separated into the upper right and the lower left, etc.), the examinee becomes confused about how to operate the controller and has difficulty in answering questions.

[0007] In view of the above-mentioned conventional techniques, the present disclosure has as its technical object to provide a subjective optometry device and a subjective optometry program that can easily perform a cross cylinder test on a subject's eye. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention is characterized by having the following configuration. (1) A subjective eye examination device according to a first aspect of the present disclosure includes an eye target presenting unit that presents a test target to an eye to be examined, an autocross cylinder lens that presents the test target separately to the eye to be examined, and a drive control unit that controls the drive of the autocross cylinder lens, and is a subjective eye examination device that subjectively measures astigmatism characteristics of the eye to be examined, and further includes an answer input unit that inputs an answer of a subject who visually recognizes the test target, an acquisition unit that acquires the astigmatism characteristics of the eye to be examined based on an answer input direction that indicates the direction in which the answer is input by the answer input unit, and an acquisition unit that acquires the astigmatism characteristics of the eye to be examined based on the answer input direction that indicates the direction in which the answer is input by the answer input unit. and a reception change means for changing the reception direction of the answer input direction for the acquisition means to acquire the astigmatism characteristics based on the boundary of the separation area which is changed in accordance with the control of the autocross cylinder lens by the drive control means, wherein the directions in which the answer can be input by the answer input means are all of the directions in which the test index is separated, and the reception change means changes the reception direction by associating the reception direction with at least one of the all directions in accordance with the boundary of the separation area. (2) A subjective eye examination device according to a second aspect of the present disclosure comprises an optotype presenting unit means for presenting a test optotype to the test eye, an autocross cylinder lens for separately presenting the test optotype to the test eye, and a drive control means for controlling the drive of the autocross cylinder lens, and is a subjective eye examination device for subjectively measuring astigmatism characteristics of the test eye, characterized in that it comprises an answer input means for inputting an answer of a subject who visually recognizes the test optotype, an acquisition means for acquiring the astigmatism characteristics of the test eye based on an answer input direction indicating the direction in which the answer was input by the answer input means, a separation area in which the test optotype is separately arranged via the autocross cylinder lens, and an acceptance change means for changing the acceptance direction of the answer input direction for the acquisition means to acquire the astigmatism characteristics based on the boundary of the separation area which is changed in accordance with the control of the autocross cylinder lens by the drive control means, and an input control means for invalidating input of the answer from a direction different from the acceptance direction by the answer input means. (3) A subjective optometry program according to a third aspect of the present disclosure is a subjective optometry program for use in a subjective optometry device that includes an optotype presenting unit that presents a test optotype to an eye to be examined, an autocross cylinder lens that presents the test optotype separately to the eye to be examined, and a drive control unit that controls the drive of the autocross cylinder lens, and that subjectively measures astigmatism characteristics of the eye to be examined. The subjective optometry program is executed by a processor, and includes a response input step for inputting an answer of a subject who visually recognizes the test optotype, and a response input step for inputting an answer of the subject who visually recognizes the test optotype. StepsThe subjective eye examination device is caused to execute an acquisition step of acquiring the astigmatism characteristics of the test eye based on an answer input direction indicating the direction in which the answer was input by the autocross cylinder lens, and an acceptance change step of changing the acceptance direction of the answer input direction for acquiring the astigmatism characteristics by the acquisition step based on a boundary of the separation area in which the test optotype is separated and arranged via the autocross cylinder lens, the boundary of the separation area being changed in accordance with the control of the autocross cylinder lens by the drive control means, wherein the directions in which the answer can be input by the answer input step are all of the directions in which the test optotype is separated, and the acceptance change step changes the acceptance direction by corresponding the acceptance direction to at least one of the directions included in all of the directions in accordance with the boundary of the separation area. (4) A subjective optometry program according to a fourth aspect of the present disclosure is a subjective optometry program for use in a subjective optometry device that includes an optotype presenting unit that presents a test optotype to an eye to be examined, an autocross cylinder lens that presents the test optotype separately to the eye to be examined, and a drive control unit that controls the drive of the autocross cylinder lens, and that subjectively measures astigmatism characteristics of the eye to be examined. The subjective optometry program is executed by a processor, and includes a response input step for inputting an answer of a subject who visually recognizes the test optotype, and a response input step for inputting an answer of the subject who visually recognizes the test optotype. Steps The subjective eye examination device is caused to execute an acquisition step of acquiring the astigmatism characteristics of the test eye based on an answer input direction indicating the direction in which the answer was input by the drive control means, an acceptance change step of changing the acceptance direction of the answer input direction for acquiring the astigmatism characteristics in the acquisition step based on a boundary of a separation area in which the test target is separated and arranged via the autocross cylinder lens, the boundary of the separation area being changed in accordance with the control of the autocross cylinder lens by the drive control means, and an input control step of invalidating input of the answer from a direction different from the acceptance direction by the answer input step. [Brief description of the drawings]

[0009] [Figure 1]FIG. 1 is an external view of a subjective optometry device. [Diagram 2] FIG. 2 is a schematic diagram of a projection optical system. [Diagram 3] FIG. 2 is a schematic diagram of an eye refractive power measuring unit. [Figure 4] 2 is a schematic diagram of a control system of the subjective optometry apparatus 100. FIG. [Diagram 5] FIG. 13 is a diagram illustrating a direction in which a response input is accepted. [Figure 6] FIG. 13 is a diagram illustrating a range of response input directions. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] <Summary> An embodiment of a subjective optometry device according to the present disclosure will be described. The items grouped in < > below may be used independently or in conjunction with each other.

[0011] The subjective optometry device in this embodiment is a device that subjectively measures the astigmatism characteristics of the subject's eye. For example, the astigmatism characteristics of the subject's eye may be at least one of cylindrical power, astigmatism axis angle, etc. Of course, the subjective optometry device may be capable of measuring spherical characteristics (e.g., spherical power, etc.), binocular vision function (e.g., prism amount, stereoscopic vision function, etc.), contrast sensitivity, etc. in addition to the astigmatism characteristics.

[0012] The subjective optometry device may project a target light beam toward the subject's eye and change the optical characteristics of the target light beam to subjectively measure the astigmatism characteristics of the subject's eye. For example, the subjective optometry device may have a target presenting means, an autocross cylinder lens, etc. The autocross cylinder lens may be provided as a part of the correction means described later. The subjective optometry device may also have an answer input means.

[0013] <Means for presenting visual targets> The subjective eye examination apparatus in this embodiment may include a target presenting means for emitting a target light beam toward the subject's eye in order to present a test target to the subject's eye.

[0014] For example, the optotype presenting means may be a display (for example, the display 31). Also, for example, the optotype presenting means may be a light source and a DMD (Digital Micromirror Device). Also, for example, the optotype presenting means may be a light source and an optotype plate.

[0015] For example, the target light beam from the target presenting means may be directly emitted toward the eye to be examined. Also, for example, the target light beam from the target presenting means may be indirectly guided toward the eye to be examined via a light projecting optical system (for example, the light projecting optical system 30). For example, the light projecting optical system may have at least one optical member through which the target light beam emitted from the target presenting means passes. As an example, it may have at least one of a lens, a mirror, and the like.

[0016] <Correction means> The optical optometry device in this embodiment may include a correction unit. For example, the correction unit is disposed between the eye to be examined and the optotype presenting unit, and changes the optical characteristics of the optotype light beam emitted from the optotype presenting unit.

[0017] The correction means may include a correction optical system. The correction optical system may be arranged in the optical path of the light projection optical system to change the optical characteristics of the visual target light beam. The correction optical system may be configured to change the optical characteristics of the visual target light beam. The correction optical system may also have an autocross cylinder lens for separately presenting the test visual target to the subject's eye.

[0018] As an example, the correction optical system may have an optical element, and the optical characteristic of the visual target light beam may be changed by controlling the optical element. For example, the optical element may be an autocross cylinder lens. Also, for example, the optical element may further include at least one of a spherical lens, a cylindrical lens, a cross cylinder lens, a rotary prism, a wavefront modulation element, a variable focus lens, etc., in addition to the autocross cylinder lens. Of course, the optical element may be different from these.

[0019] As another example, the correction optical system may change the optical characteristics of the target light beam by optically changing the presenting position (presenting distance) of the target with respect to the eye to be examined. In this case, the target presenting means may be moved in the optical axis direction, or an optical element (e.g., a spherical lens, etc.) arranged in the optical path may be moved in the optical axis direction.

[0020] As another example, the correction optical system may be configured such that an optical element is disposed between an optical member for guiding the target light beam from the light projecting optical system toward the subject's eye and a target presenting means, and the optical element is controlled to change the optical characteristics of the target light beam. That is, the correction optical system may be a phantom lens refractometer (phantom correction optical system).

[0021] As another example, the correction optical system may change the optical characteristics of the visual target light beam by switching and positioning the optical elements arranged in front of the eye to be examined. That is, the correction optical system may be an eye examination unit (e.g., the eye refractive power measuring unit 40). For example, the eye examination unit may have a lens disk on which a plurality of optical elements are arranged on the same circumference, and a driving means for rotating the lens disk, and may be configured to electrically switch the optical elements by driving the driving means (e.g., a motor).

[0022] <Drive control means> The subjective optometry device in this embodiment may include a drive control means (e.g., a control unit 60). The drive control means controls the drive of the autocross cylinder lens to change the boundary of the separation area where the test optotype is separated via the autocross cylinder lens. In other words, the drive control means changes the position of the boundary (the direction of the boundary) in the separation area of ​​the test optotype. For example, the arrangement of the multiple prism areas of the autocross cylinder lens changes by driving the autocross cylinder lens, and based on this, the position of the boundary of the separation area of ​​the test optotype is changed.

[0023] The drive control means may control the drive of an autocross cylinder lens of the correction means (corrective optical system). For example, the autocross cylinder lens may be rotated around the optical axis of the visual target light beam emitted from the visual target presenting means. As an example, if the correction means is the above-mentioned eye examination unit, the drive control means rotates the autocross cylinder lens around the optical axis to change the angle at which the axis of the autocross cylinder lens is positioned in the test window (e.g., test window 43). This makes it possible to change the boundary of the separation area where the test visual targets are separated.

[0024] <How to enter your answer> The subjective eye examination device in this embodiment includes an answer input means. The answer input means may be a means for inputting an answer of a subject who visually recognizes the test optotype. For example, the answer input means may be a means for the subject to input an answer by himself / herself. As an example, the answer input means may be an operating means such as a lever switch, a push button switch, or the like (for example, a subject controller 20).

[0025] The answer input means may be configured to select one of the multiple test optotypes separated by the autocross cylinder lens as an answer input for visually recognizing the test optotype. For example, the answer input means may be configured to allow input of multiple predetermined directions. As an example, it may allow input of four directions, up, down, left, and right. In other words, it may allow input of angles of 0° (360°), 90°, 180°, and 270°. Of course, it may be possible to input approximately up, down, left, and right directions. Note that the multiple predetermined directions may be four directions other than the up, down, left, and right directions (for example, diagonal directions such as upper left, lower left, upper right, and lower right). In addition, the multiple predetermined directions may be directions that include other directions (for example, diagonal directions) in addition to the up, down, left, and right directions. As an example, it may be eight directions including upper right, lower right, upper left, and lower left in addition to the up, down, left, and right directions. When the answer input means is configured in this way, the subject can easily operate the answer input means.

[0026] Also, for example, the answer input means may be configured to allow input in all directions. In other words, it may allow input at each angle from 0° to 360°. In such a case, the subject can intuitively operate the answer input means since input in the direction corresponding to the selected test optotype is possible regardless of the separation state of the test optotype.

[0027] The answer input means may be provided integrally with the housing of the subjective optometry device, or may be provided separately from the housing of the subjective optometry device.

[0028] <Acquisition method> The subjective eye examination device in this embodiment may include an acquisition means (e.g., a control unit 60). The acquisition means acquires the astigmatism characteristics of the subject's eye based on an answer input direction indicating the direction in which an answer is input by the answer input means. For example, the acquisition means may acquire the astigmatism characteristics based on an input signal indicating the answer input direction from the answer input means. As an example, an input signal of an acceptance direction changed by an acceptance change means described later may be obtained from the answer input means, and the astigmatism characteristics may be acquired based on this input signal. Note that the astigmatism characteristics of the subject's eye may be acquired based on such an answer input direction and the optical characteristics of an optical element of the correction means (corrective optical system) (i.e., the optical characteristics of the target light beam).

[0029] <Method of changing reception> The subjective eye examination device in this embodiment may include a reception change means (e.g., the control unit 60). The reception change means changes the reception direction of the answer input direction for the acquisition means to acquire astigmatism characteristics based on the change of the boundary of the separation area of ​​the test optotype by the drive control means. This allows the subject's answer input direction to be appropriately associated with the direction of the selected test optotype in the cross cylinder test during the self-eye examination.

[0030] The reception change means may change the reception direction for receiving the answer input direction to a predetermined direction (i.e., a predetermined angle) based on the change of the boundary of the separation area. The reception change means may change the reception direction every time the position of the boundary of the separation area is changed. For example, the reception direction may change each time according to the angle of the boundary of the separation area. Also, the reception change means may change the reception direction every time the position of the boundary of the separation area is changed in a certain area. For example, when the angle of the boundary of the separation area is changed in a first area, the reception direction may not be changed, and when the angle is changed from the first area to a second area different from the first area, the reception direction may be changed. For example, in these cases, when the boundary of the separation area of ​​the test optotype is changed, the predetermined direction is appropriately changed, and the input signal inputted in the predetermined direction from the answer input means is acquired as an input signal representing the answer input direction by the answer input means.

[0031] As an example, if the answer input means is configured to allow input in four directions, up, down, left, and right, the reception change means associates the reception direction with at least one of the four directions according to the position of the boundary of the separation area of ​​the test optotype. In other words, the reception direction is associated with at least one of the four directions according to the direction in which the test optotype is separated. For example, the reception direction may be associated with only one direction, or may be associated with two directions, for the test optotype according to the position of the boundary. This may change the reception direction. Of course, if the answer input means is configured to allow input in four diagonal directions in addition to the four directions, up, down, left, and right (that is, a configuration in which input in eight directions is possible), the reception change means may associate the reception direction with at least one of the eight directions according to the position of the boundary of the separation area of ​​the test optotype. In these cases, even when a controller or the like that limits the subject's operation and makes answer input easy is used, the test optotype selected by the subject is appropriately determined.

[0032] The reception change means may change the reception direction for receiving the answer input direction to a range including at least one predetermined direction (i.e., an angle having a predetermined range). The reception change means may change the range of the reception direction every time the position of the boundary of the separation area is changed, or may change the range of the reception direction every time the position of the boundary of the separation area is changed by a fixed area.

[0033] For example, in these cases, when the boundary of the separation area of ​​the test optotype is changed, the range of the acceptance direction is changed appropriately, and an input signal input from the answer input means in a direction within the range of the acceptance direction is obtained as an input signal representing the answer input direction by the answer input means.

[0034] For example, if the answer input means is configured to allow input in all directions, the reception change means associates the reception direction with at least one of the directions included in all directions according to the position of the boundary of the separation area of ​​the test optotype. In this case, even if a controller or the like that allows input by an intuitive operation of the subject is used, the test optotype selected by the subject is appropriately determined.

[0035] <Input control means> The subjective eye examination device in this embodiment may include an input control means (for example, a control unit 60). The input control means invalidates the input of an answer from a direction different from the reception direction by the answer input means. This makes it possible to suppress automatic progress of the examination even if the subject inputs an answer from a direction where the test target is not located due to an operation error or the like.

[0036] The input control means invalidates the input in response to input of an answer from the answer input means so that processing for acquiring the astigmatism characteristics by the acquisition means is not performed. For example, the input control means may invalidate the input from a direction different from the acceptance direction by prohibiting acceptance of the answer input direction input from the answer input means. Also, for example, the input control means may invalidate the input from a direction different from the acceptance direction by prohibiting execution of an operation based on the answer input direction input from the answer input means. As one example, the input control means may prohibit execution of an operation for controlling an optical element (rotating a cross cylinder lens, switching a cylindrical lens, etc.).

[0037] The present disclosure is not limited to the devices described in the present embodiment. For example, terminal control software (programs) that perform the functions of the following embodiments may be supplied to a system or device via a network or various storage media, and a control device (e.g., a CPU) of the system or device may read and execute the program.

[0038] <Example> An example of a subjective optometry device according to the present embodiment will be described below. In this example, the left-right direction of the optometry device is represented as the X direction, the up-down direction as the Y direction, and the front-rear direction as the Z direction.

[0039] Fig. 1 is an external view of a subjective optometry device 100. Fig. 1(a) shows a state in which an eye refractive power measurement unit 40 is supported at a standby position. Fig. 1(b) shows a state in which the eye refractive power measurement unit 40 is supported at a measurement position. For example, the subjective optometry device 100 includes a housing 1, a presentation window 2, a speaker 3, a holding unit 4, an examiner controller 10, a subject controller 20, an eye refractive power measuring unit 40, and the like.

[0040] The housing 1 has a light projection optical system 30 inside. The presentation window 2 transmits the visual target light beam from the light projection optical system 30. The visual target light beam is projected onto the subject's eye E through the presentation window 2. When an eye refractive power measuring unit 40 is disposed between the subject's eye E and the presentation window 2 (see FIG. 1(b)), the visual target light beam is projected onto the subject's eye E through the presentation window 2 and a test window 43 described below. This presents a test visual target to the subject's eye E. The speaker 3 outputs audio guidance and the like.

[0041] The holding unit 4 holds the eye refraction measuring unit 40. For example, the holding unit 4 moves an arm by driving a driving unit (motor or the like) not shown, thereby moving the eye refraction measuring unit 40 connected to the arm. This allows the eye refraction measuring unit 40 to be switched between a standby position and a measurement position.

[0042] The examiner's controller 10 is used by the examiner to operate the subjective optometry device 100. The examiner's controller 10 includes a switch section 11, a monitor 12, and the like. The switch section 11 inputs signals for performing various settings (e.g., moving the eye refractive power measuring unit 40, etc.). The monitor 12 displays various information (e.g., measurement results of the examinee's eye E, etc.). The monitor 12 may function as a touch panel that also serves as the switch section 11. Signals from the examiner's controller 10 are output to the control section 60 by wired communication or wireless communication.

[0043] The subject controller 20 is used to input the subject's answer. The subject controller 20 includes an answer lever 21, an answer button 22, etc. The answer lever 21 is used by the subject when inputting a direction relative to the test target. For example, signals in four directions, up, down, left, and right, can be input by tilting. The answer button 22 is used when the subject does not select a direction relative to the test target. The signal from the subject controller 8 is output to the control unit 60 by wired or wireless communication.

[0044] <Projection optical system> Fig. 2 is a schematic diagram of the light projection optical system 30. Fig. 2(a) shows the optical arrangement during a distance test. Fig. 2(b) shows the optical arrangement during a near test. The light projection optical system 30 projects a visual target light beam toward the subject's eye E. For example, the light projection optical system 30 includes a display 31, a plane mirror 32, a concave mirror 33, a near / far switcher 34, and the like.

[0045] The display 31 displays a visual target (e.g., a fixation target, a test visual target, etc.). A visual target light beam emitted from the display 31 forms an image on the fundus of the subject's eye E, thereby presenting the visual target to the subject's eye E. For example, the display 31 may be an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence), a plasma display, etc.

[0046] The plane mirror 32 reflects the visual target light beam from the display 31 and guides it to the concave mirror 33. The plane mirror 32 also reflects the visual target light beam from the display 31 and guides it to the subject's eye E. For example, the plane mirror 32 is disposed so that the distance (presentation distance) from the subject's eye E to the display 31 during a near vision test of the subject's eye E is optically 40 cm. Note that instead of the plane mirror 32, it is also possible to use a reflecting member such as a prism, a beam splitter, or a half mirror.

[0047] The concave mirror 33 reflects the visual target light beam from the display 31 and guides it to the plane mirror 32. For example, the concave mirror 33 is disposed so that the distance (presentation distance) from the subject's eye E to the display 31 during a distance test of the subject's eye E is optically 5 m. Note that instead of the concave mirror 33, it is also possible to use a reflective member such as an aspheric mirror or a free-form mirror. Also, instead of the concave mirror 33, it is also possible to use a lens or the like.

[0048] The far / near switching unit 34 switches the arrangement of the display 31 between a distance test and a near test of the subject's eye E. For example, the far / near switching unit 34 moves the holding unit by driving a drive unit (motor or the like) not shown, thereby moving the display 31 held by the holding unit. This allows the display 31 to be switched between a distance arrangement and a near arrangement.

[0049] For example, during a distance test of the subject's eye E, the display screen of the display 31 is directed toward the back of the housing 1 (see FIG. 2(a)). The visual target light beam from the display 31 passes through the optical axis L1 and enters the plane mirror 32, where it is reflected in the direction of the optical axis L2. It also passes through the optical axis L2 and enters the concave mirror 33, where it is reflected in the direction of the optical axis L3. It also passes through the optical axis L3 and enters the plane mirror 32, where it is reflected in the direction of the optical axis L4. As a result, the visual target light beam that has passed through each optical member inside the housing 1 and is emitted to the outside of the housing 1 is projected onto the subject's eye E.

[0050] For example, during a near vision test of the subject's eye E, the display screen of the display 31 is directed toward the upper surface of the housing 1 (see FIG. 2(b)). The visual target light beam from the display 31 passes through the optical axis L3 and enters the plane mirror 32, and is reflected by the plane mirror 32 in the direction of the optical axis L4. As a result, the visual target light beam that has passed through each optical member inside the housing 1 and is emitted to the outside of the housing 1 is projected onto the subject's eye E.

[0051] <Eye refractive power measurement unit (corrective optical system)> 3 is a schematic diagram of the eye refraction measuring unit 40. The eye refraction measuring unit 40 subjectively measures the refractive power of the subject's eye E. The eye refraction measuring unit 40 is also used as a correction optical system. The correction optical system is disposed in the optical path of the projection optical system 30, and changes the optical characteristics of the visual target light beam. For example, the eye refraction measuring unit 40 includes a forehead rest 41, a lens unit 42, an examination window 43, a moving unit 44, and the like.

[0052] The forehead rest 41, against which the subject's head rests, fixes the subject's eye E at a predetermined examination position and maintains a constant distance from the subject's eye E to the examination window 43. The lens unit 42 has a pair of left and right lens units 42L and 42R. The lens unit 42 has an examination window 43 (a left examination window 43L and a right examination window 43R).

[0053] The moving unit 44 adjusts the distance between the left lens unit 42L and the right lens unit 42R and the convergence angle (inward angle) between the left lens unit 42L and the right lens unit 42R. For example, the moving unit 44 adjusts the distance between the left lens unit 42L and the right lens unit 42R by driving the driving unit 45 (left driving unit 45L and right driving unit 45R). Also, for example, the moving unit 44 adjusts the convergence angle between the left lens unit 42L and the right lens unit 42R by driving the driving unit 46. For a detailed configuration of the moving unit 44, please refer to, for example, Japanese Patent Application Laid-Open No. 2004-329345.

[0054] The lens unit 42 includes a lens disk 50 therein. The lens disk 50 has a pair of left and right lens disks, a left lens disk 50L and a right lens disk 50R. The lens disk 50 is rotated by driving a drive unit 51 (left drive unit 51L and right drive unit 51R). The lens disk 50 also has an opening (or a 0D lens) and a plurality of optical elements 52 (left optical element 52L and right optical element 52R) arranged on the same circumference. These optical elements are rotated by driving a drive unit 53 (left drive unit 53L and right drive unit 53R). As a result, the desired optical element 52 is switched and positioned in the inspection window 43 at the desired angle.

[0055] The lens disk 50 is composed of one lens disk or multiple lens disks. For example, a spherical lens disk, a cylindrical lens disk, an auxiliary lens disk, etc. may be provided. As an example, the spherical lens disk may have multiple spherical lenses with different spherical powers (spherical refractive powers). Also, as an example, the cylindrical lens disk may have multiple cylindrical lenses with different cylindrical powers (cylindrical refractive powers). Also, as an example, the auxiliary lens disk may have a shielding plate, a polarizing filter, a red filter / green filter, a dispersion prism, a Maddox lens, a rotary prism, a cross cylinder lens, an auto cross cylinder lens, a positioning lens, etc. The driving unit 51 and the driving unit 53 may be provided for each lens disk.

[0056] The eye refractive power measuring unit 40 may be configured to change the optical characteristics of the visual target light beam. For example, as in this embodiment, the eye refractive power measuring unit 40 may be configured to control an optical element. Also, for example, the eye refractive power measuring unit 40 may be configured to control a wavefront modulation element.

[0057] <Control Unit> FIG. 4 is a schematic diagram of a control system of the subjective optometry device 100. For example, the control unit 60 includes a CPU (processor), a RAM, a ROM, etc. The CPU controls the driving of each unit in the subjective optometry device 100. Various information is temporarily stored in the RAM. Various programs executed by the CPU are stored in the ROM. As an example, a program for realizing an application (self-optometry application) that automatically progresses the optometry based on answers input by the subject is stored. The control unit 60 may be composed of multiple control units (i.e., multiple processors).

[0058] The control unit 60 is connected to the speaker 3, the display 31, the examiner's controller 10, the subject's controller 20, a non-volatile memory 70 (hereinafter, memory 70), etc. Also connected to the control unit 60 are a drive unit for the holding unit 4, a drive unit for the near / far switching unit 34, a drive unit for the eye refractive power measuring unit 40 (drive units 45, 46, 51, 53), etc.

[0059] The memory 70 is a non-transient storage medium that can retain stored contents even if the power supply is cut off. For example, the memory 70 may be a hard disk drive, a flash ROM, a USB memory, or the like.

[0060] <Control action> The control operation of the subjective optometry apparatus 100 will be described.

[0061] In a self-eye examination, an objective test and a subjective test are performed in sequence on the subject's left eye. For example, an objective value of the left eye is obtained by the objective test. Also, for example, a subjective test is performed on the left eye in a state where the left eye is corrected to a predetermined ocular refractive power (0D, etc.) with a predetermined correction power based on the objective value of the left eye (i.e., the initial state), and a subjective value of the left eye is obtained. After each test on the subject's left eye is completed, each test on the subject's right eye is performed in the same manner, and the objective value and subjective value of the right eye are obtained.

[0062] For example, the subjective test includes a plurality of test items. As an example, a red-green test for adjusting the spherical power in the initial state of the subject's eye E to an appropriate power may be included. As another example, a cross cylinder test for adjusting the cylindrical power and the cylindrical axis angle in the initial state of the subject's eye E to an appropriate power and angle may be included. As another example, a visual acuity test for measuring the highest visual acuity value in a state in which the spherical power, the cylindrical power, and the cylindrical axis angle of the subject's eye E are corrected to an appropriate power and angle may be included. For example, the eye examination for each test item is automatically progressed by the execution of the self-eye examination application.

[0063] In this embodiment, the cross cylinder test among the subjective tests will be described in detail. In the cross cylinder test, two point cloud targets are presented to the subject's eye E, and it is determined whether the astigmatism axis angle of the subject's eye E matches the desired astigmatism axis angle for correcting the subject's eye E. For example, if the two point cloud targets are seen to the same extent, it is determined that the respective angles match. For example, if there is a difference in the appearance of the two point cloud targets, it is determined that the respective angles do not match. In addition, in the cross cylinder test, two point cloud targets are presented to the subject's eye E, and it is determined whether the state in which the subject's eye E is corrected with the desired cylindrical power is appropriate. For example, if the two point cloud targets are seen to the same extent, it is determined that the cylindrical power is appropriate. For example, if there is a difference in the appearance of the two point cloud targets, it is determined that the cylindrical power is not appropriate.

[0064] <Cross cylinder inspection flow> For example, the auto cross cylinder method is used for the cross cylinder test during self-eye examination. The auto cross cylinder method is a method in which two point cloud targets are simultaneously presented to the subject, and the subject is made to visually recognize and compare them by arranging an auto cross cylinder lens. Here, we will take the example of the left eye being the measurement eye and the right eye being the non-measurement eye.

[0065] At the start of the cross cylinder test, the control unit 60 generates a voice guide from the speaker 3, which indicates how to operate the subject controller 20. As an example, a voice guide may be generated instructing the subject to tilt the answer lever 21 in the direction of the point cloud target that is clearly visible out of the two point cloud targets, and to press the answer button 22 if the two are about the same.

[0066] Next, the control unit 60 drives the left drive unit 51L to place a cylindrical lens having a predetermined cylindrical power based on the objective value and an autocross cylinder lens in the left test window 43L. For example, the autocross cylinder lens is a lens having two prism regions that are divided into two with the lens center as an axis and are given cylindrical power so that the astigmatism axes are perpendicular to each other. In addition, the control unit 60 drives the right drive unit 51R to place a shielding plate in the right test window 43R. Furthermore, the control unit 60 controls the display 31 to display one point cloud optotype on the screen.

[0067] The subject places his / her forehead on the forehead rest 41 and observes the point cloud target through the test window 43 and the presentation window 2. For example, the field of view of the left eye is separated into two by the prism component of the autocross cylinder lens. That is, one point cloud target displayed on the display 31 is separated into two point cloud targets (point cloud target A and point cloud target B (see FIG. 5) described later) and presented via the two prism regions. For example, the field of view of the right eye (non-measured eye) is blocked by a blocking plate.

[0068] The control unit 60 proceeds with the cross cylinder test. For example, the control unit 60 drives the left drive unit 53L to rotate the auto cross cylinder lens in the left test window 43L to an axis angle for adjusting the astigmatism axis angle. In addition, for example, the control unit 60 generates a voice guide from the speaker 3, asking the subject which direction of the point cloud target is clearly visible.

[0069] When the control unit 60 receives an input signal from the answer lever 21 (when the direction of the point cloud target is selected), it rotates the autocross cylinder lens according to the tilt direction of the answer lever 21 to change the astigmatism axis angle. After changing the astigmatism axis angle, the control unit 60 again generates a voice guide asking about the direction of the point cloud target. The control unit 60 repeats this control until it receives an input signal from the answer button 22 (until it is answered that the visibility of the two point cloud targets is about the same). This adjusts the astigmatism axis angle of the subject's eye E.

[0070] When the control unit 60 receives an input signal from the answer button 22, it acquires the astigmatism axis angle that has been correcting the left eye at this point as the astigmatism axis angle that will appropriately correct the left eye. In addition, it automatically switches from adjusting the astigmatism axis angle to adjusting the cylindrical power. For example, the control unit 60 drives the left drive unit 53L to rotate the autocross cylinder lens in the left test window 43L to the axis angle for adjusting the cylindrical power. In addition, for example, it generates a voice guide from the speaker 3 asking the subject which direction of the point cloud target is clearly visible.

[0071] When the control unit 60 receives an input signal from the answer lever 21, it switches the cylindrical lens according to the tilt direction of the answer lever 21. For example, it switches the cylindrical lens so as to increase or decrease the cylindrical power by one step. After switching the cylindrical lens, the control unit 60 again generates a voice guide asking about the direction of the point cloud target. The control unit 60 repeats such control until it receives an input signal from the answer button 22. This adjusts the cylindrical power of the subject's eye E.

[0072] When the control unit 60 receives an input signal from the answer button 22, it acquires the cylindrical power that has been correcting the left eye at this point as the cylindrical power that will appropriately correct the left eye. It also ends the adjustment of the cylindrical power and ends the cross cylinder test.

[0073] <Entering answers and changing reception direction> In the above-mentioned cross cylinder test (auto cross cylinder method), the boundary of the separation area where the two point cloud targets are separated is changed by rotating the auto cross cylinder lens, and the two point cloud targets rotate around the optical axis L4 (details will be described later).

[0074] In a self-eye examination where the examiner is not present with the examinee, the positional relationship between the two point cloud optotypes may make it difficult for the examinee to input an answer. The examinee controller 20 for the self-eye examination is preferably configured simply so that the examinee can easily operate it by himself. For example, it is preferably configured to allow input in eight directions, including up, down, left, right, and diagonal directions, or to allow input in four directions, including up, down, left, right, and the like.

[0075] In this embodiment, an example is given in which the answer lever 21 is tilted up, down, left, and right to input four directions corresponding to up, down, left, and right. For example, the four directions corresponding to up, down, left, and right are directions corresponding to 0°, 90°, 180°, and 270° with respect to the horizontal direction as a reference. When the answer lever 21 is used to input four directions, when the point cloud target is arranged in a direction different from the four directions and possible answer directions are mixed, the subject is likely to be confused about the tilt direction of the answer lever 21. For example, when the point cloud target is arranged in a 60° direction and there are two possible answers, the right direction (0° direction) or the up direction (90° direction), the subject is likely to be confused about whether to tilt the answer lever 21 to the right or up. In particular, when the point cloud target is located in the 45° direction, which is the farthest from the horizontal and vertical directions, such a problem is likely to occur. In addition, when the point cloud target is located at 135°, 225°, 315°, etc., the same problem is likely to occur.

[0076] Therefore, the control unit 60 changes the receiving direction for receiving the answer input direction based on the change in the boundary of the separation area of ​​the point cloud target accompanying the rotation of the autocross cylinder lens. In other words, the receiving direction is changed so that the answer input direction is regarded as a predetermined input direction. This will be described in detail below.

[0077] FIG. 5 is a diagram for explaining the direction of receiving the answer input direction. FIG. 5(a) shows a state in which two point cloud targets are located in the horizontal direction in the field of view of the left eye. FIG. 5(b) shows a state in which two point cloud targets are located in a diagonal direction different from the horizontal and vertical directions in the field of view of the left eye. For example, two point cloud targets A and B are separated symmetrically across the boundary between two prism areas in an autocross cylinder lens. That is, the boundary between the two prism areas is the boundary S between the separation area Pa of the point cloud target A and the separation area Pb of the point cloud target B, and each point cloud target is separated symmetrically across this boundary S. For this reason, for example, in FIG. 5(a), the boundary S is located in the vertical direction, and the point cloud target A is arranged in the 0° direction and the point cloud target B is arranged in the 180° direction so that the separation area Pa and the separation area Pb are separated to the right and left in the field of view of the subject's eye E. Also, for example, in Figure 5 (b), the boundary S is located in the 135° direction and the 315° direction, and the point cloud target A is arranged in the 45° direction and the point cloud target B is arranged in the 225° direction so that the separation areas Pa and Pb are separated into the upper right and lower left in the field of view of the test eye E.

[0078] In this embodiment, the control unit 60 changes the reception direction for receiving the input direction of the answer by tilting the answer lever 21 based on the position of the boundary S between the separation area Pa and the separation area Pb. For example, a predetermined direction with respect to the direction of the point cloud index A and the point cloud index B according to the position of the boundary S is set as the reception direction, and this is changed appropriately. For example, as shown in FIG. 5(a), when the boundary S between the separation area Pa and the separation area Pb is located in the vertical direction, the 0° (360°) direction is set as the reception direction Ka for the point cloud index A. The 180° direction is set as the reception direction Kb for the point cloud index B. Also, for example, as shown in FIG. 5(b), when the boundary S between the separation area Pa and the separation area Pb is located in the 135° direction and the 225° direction, the 0° (360°) direction and the 90° direction are set as the reception direction Ka for the point cloud index A. The 180° direction and the 270° direction are set as the reception direction Kb for the point cloud index B.

[0079] When the control unit 60 receives an input signal from the answer lever 21 in one direction corresponding to the reception direction Ka or the reception direction Kb, the control unit 60 generates a conversion signal that converts the input signal into the direction of the point cloud target. In FIG. 5(a), the positions (directions) of the two point cloud targets and the tiltable direction of the answer lever 21 are the same, so the subject tilts the answer lever 21 without hesitation. For example, when the subject clearly recognizes the point cloud target A, the answer lever 21 is tilted to the right. The control unit 60 converts an input signal in the right direction (0° direction) into a conversion signal in the 0° direction, which is the direction of the point cloud target A. Also, for example, when the subject clearly recognizes the point cloud target B, the answer lever 21 is tilted to the left. The control unit 60 converts an input signal in the left direction (180° direction) into a conversion signal in the 180° direction, which is the direction of the point cloud target B.

[0080] In addition, since the input signal of the up and down directions of the answer lever 21 does not correspond to either the reception direction Ka or the reception direction Kb, a process may be performed to invalidate this input signal. As an example, a process may be performed to reject the reception of the input signal, not to generate a conversion signal based on the input signal, or the like.

[0081] In FIG. 5(b), the positions (directions) of the two point cloud targets are misaligned with the tiltable direction of the answer lever 21, so the subject may be confused about the tilt direction of the answer lever 21. For example, when the examiner clearly sees the point cloud target A, the subject may tilt the answer lever 21 to the right or upward. However, since the control unit 60 changes the reception direction in accordance with the boundary S of the separation area, both the input signal in the right direction (0° direction) and the input signal in the upward direction (90° direction) are in a state corresponding to the reception direction Ka. Therefore, even if the control unit 60 acquires an input signal in the right direction or an input signal in the upward direction, it can convert these into a conversion signal in the 45° direction, which is the direction of the point cloud target A. Also, for example, when the subject clearly sees the point cloud target B, the subject may tilt the answer lever 21 to the left or downward. However, since the left direction input signal and the downward direction input signal both correspond to the receiving direction Kb, the control unit 60 can convert these into conversion signals in the 225° direction, which is the direction of the point cloud target B.

[0082] When the control unit 60 acquires a conversion signal corresponding to the direction of the point group target based on the input signal from the answer lever 21, it rotates the autocross cylinder lens or switches the cylindrical lens. This allows at least one of the astigmatism axis angle and the cylindrical power of the subject's eye E to be appropriately adjusted.

[0083] As described above, for example, the subjective eye examination device in this embodiment changes the receiving direction of the answer input direction indicating the direction in which the subject who viewed the test optotype inputs an answer based on the change in the boundary of the separation area in which the test optotype is separated via the auto cross cylinder lens. As a result, even if the arrangement of the test optotypes separated into multiple parts changes during the cross cylinder test during self-eye examination, causing the subject to be confused about inputting an answer, or even if the subject has difficulty inputting an answer (for example, when input from the controller is possible only in a specific direction, etc.), the input direction of the subject's answer and the direction of the selected test optotype can be appropriately associated with each other.

[0084] In addition, for example, the subjective optometry device in this embodiment allows the subject's answer to be input in four directions, up, down, left, and right, and the reception direction is changed by associating the reception direction with at least one of the four directions according to the boundary of the separation area that separates the test optotypes. This makes it possible to appropriately determine the test optotype selected by the subject, especially when using a controller that limits the subject's operation and makes it easy to input answers.

[0085] It is possible to change the contents of the voice guidance for the examinee to guide the operation of the answer lever 21, but in self-eye examination, it is difficult to communicate between the examiner and the examinee, making it difficult to input an answer. For example, in detail, when the point cloud optotype is located in the 45° direction and the 225° direction, the contents of the voice guidance may be in the form of a two-choice format, such as tilting the answer lever 21 to the right or left. However, if the examinee is elderly or if the examinee misses the voice guidance, the examinee may intuitively operate the lever. For example, the examinee may tilt the answer lever 21 upward or downward without following the contents of the voice guidance. For example, even in such a case, the examination can be efficiently carried out by associating the four reception directions in which the examinee can answer with each boundary of the separation area of ​​the test optotype.

[0086] Also, for example, the subjective eye examination device in this embodiment invalidates the input of the subject's answer when the subject's answer input direction is different from the reception direction. This makes it possible to prevent the eye examination program of the cross cylinder test from automatically progressing even if the subject makes an operation error and inputs an answer from a direction where the test target is not located, thereby improving the test accuracy. Also, by preventing the eye examination program from automatically progressing due to an operation error, it becomes less likely that the test will have to be repeated, and the test time can be shortened.

[0087] <Example of transformation> In this embodiment, the answer lever 21 is described as being tiltable only in four directions, up, down, left, and right, but is not limited thereto. The answer lever 21 may be configured to select one of the two point cloud targets even if they rotate and move. For example, the answer lever 21 may be tiltable in four or more directions. As an example, the answer lever 21 may be tiltable in eight directions, including the four directions of upper right, lower right, upper left, and lower left in addition to the four directions of upper right, lower right, upper left, and lower left. Also, for example, the answer lever 21 may be tiltable in all directions (in other words, all angles). Even in such a case, the subject can easily input an answer regardless of the positional relationship of the two point cloud targets by changing the reception direction (reception direction Ka and reception direction Kb) for receiving an input signal from the answer lever 21 in accordance with the boundary S of the separation area (separation area Pa and separation area Pb) that separates the two point cloud targets.

[0088] Here, in the cross cylinder test, it is sufficient to know which of the two point cloud targets the examiner has selected, and it is not necessary that the direction of the point cloud target and the tilt direction of the answer lever 21 are the same. In other words, it is sufficient that the tilt direction of the answer lever 21 is approximately the same as the direction of the point cloud target. For this reason, for example, when the answer lever 21 is configured to be tiltable in all directions, a predetermined range may be provided in the acceptance direction for accepting an input signal by tilting the answer lever 21. In other words, a range having a predetermined angle with respect to the direction of the point cloud target may be set as the acceptance direction (acceptance range). As an example, the predetermined range may be ±45°.

[0089] FIG. 6 is a diagram for explaining the acceptance range of the answer input direction. Note that the position of the boundary S between the separation area Pa and the separation area Pb in FIG. 6 and the state in which the two point cloud targets are located are the same as those in FIG. 5. For example, as shown in FIG. 6(a), when the boundary S between the separation area Pa and the separation area Pb is located in the vertical direction, the acceptance range Kc may be set to 0° to 45° and 315° to 360° for the point cloud target A. The acceptance range Kd may be set to 135° to 225° for the point cloud target B. Also, as shown in FIG. 6(b), when the boundary S between the separation area Pa and the separation area Pb is located in the 135° direction and the 225° direction, the acceptance range Kc may be set to 0° to 90° for the point cloud target A. The acceptance range Kd may be set to 180° to 270° for the point cloud target B.

[0090] When the control unit 60 receives an input signal from the answer lever 21 in any one of the directions included in the reception range Kc or the reception range Kd, the control unit 60 generates a conversion signal that converts the input signal into the direction of the point cloud target. In FIG. 6(a), for example, when the examiner clearly recognizes the point cloud target A, the answer lever 21 is tilted approximately to the right. When the control unit 60 receives an input signal in any of the directions of 0° to 45° and 315° to 360°, the control unit 60 converts the input signal into a conversion signal in the 0° direction, which is the direction of the point cloud target A. Also, for example, when the examiner clearly recognizes the point cloud target B, the control unit 60 converts the input signal into a conversion signal in the 180° direction, which is the direction of the point cloud target B. When the control unit 60 receives an input signal in any of the directions of 135° to 225°, the control unit 60 converts the input signal into a conversion signal in the 180° direction, which is the direction of the point cloud target B.

[0091] In FIG. 6(b), for example, when the examiner clearly recognizes point cloud target A, the answer lever 21 is tilted approximately in the upper right direction. When the control unit 60 receives an input signal in any direction between 0° and 90°, it converts this into a conversion signal in the 45° direction, which is the direction of point cloud target A. Also, for example, when the examiner clearly recognizes point cloud target B, the answer lever 21 is tilted approximately in the lower left direction. When the control unit 60 receives an input signal in any direction between 180° and 270°, it converts this into a conversion signal in the 225° direction, which is the direction of point cloud target B.

[0092] Of course, in FIG. 6(a) and FIG. 6(b), the control unit 60 may perform a process of invalidating an input signal in a direction not included in the acceptance range Kc or the acceptance range Kd.

[0093] For example, the subjective optometry device of this embodiment may be configured to allow the subject's answer to be input in all directions, and the reception direction may be changed by associating the reception direction with at least one of the all directions according to the boundary of the separation area where the test optotypes are separated. This allows the test optotype selected by the subject to be appropriately determined even when a controller or the like that allows input by the subject's intuitive operation is used.

[0094] In this embodiment, the acceptance range for accepting the input signal from the answer lever 21 is set to an angle of ±45°, but is not limited thereto. As described above, in the cross cylinder test, it is sufficient to know which of the two point cloud targets the examiner has selected, so the acceptance range may be set to a range having an angle other than ±45° based on the position of the point cloud target. Also, the acceptance range may be set to a range having an asymmetric angle on either side of the point cloud target.

[0095] In this embodiment, the size of the acceptance range for each point cloud target is constant regardless of the position of the boundary S of the separation area that separates the point cloud target, but the present invention is not limited to this. The size of the acceptance range for each point cloud target may be changed according to the position of the boundary S. For example, as shown in FIG. 6(a), when the boundary S of the separation area is horizontal or vertical, the acceptance range for the direction of the point cloud target may be set narrow, and as shown in FIG. 6(b), when the boundary S of the separation area is oblique, the acceptance range for the direction of the point cloud target may be set wide. As an example, when the boundary S of the separation area is horizontal or vertical, the acceptance range may be ±45°, and when the boundary S of the separation area is oblique, the acceptance range may be ±90°.

[0096] In this embodiment, the configuration has been described by way of example in which the reception direction (reception range) for receiving an input signal from the answer lever 21 is changed every time the boundary S of the separation area that separates the two point cloud targets is changed, but the present invention is not limited to this. In this embodiment, the reception direction may be changed every time the boundary S of the separation area of ​​the point cloud targets is changed by a certain area (certain angle). For example, in this case, the answer lever 21 can be tilted in all directions, but it may also be possible to input input signals in four directions, up, down, left, and right. As an example, the input signals in the four directions may be assigned to a range of ±45° directions based on the horizontal and vertical directions.

[0097] For example, when the point cloud target A is arranged in any of the directions of 91° to 179°, the boundary S of the separation area of ​​the point cloud target is located in any of the directions of 1° to 89° (181° to 269°). In this case, the determination that the subject has selected the point cloud target A may be made by acquiring an input signal of either the upward or leftward direction from the answer lever 21. Therefore, the control unit 60 may set the reception direction by tilting the answer lever 21 to the range of 45° to 225° corresponding to the upward and leftward directions while the boundary S of the separation area of ​​the point cloud target is located in the range of 1° to 89°.

[0098] For example, when the point cloud target A is arranged in the 180° direction (when the boundary S is located in the 90° direction), the selection of the point cloud target A may be determined by obtaining an input signal in the left direction. Therefore, when the boundary S is located in the 90° direction, the control unit 60 may set the reception direction to a range of 135° to 225° corresponding to the left direction. Also, for example, when the point cloud target A is arranged in the 181° to 269° direction (when the boundary S is located in the 91° to 179° direction), the selection of the point cloud target A may be determined by obtaining an input signal in either the left direction or the downward direction. Therefore, when the boundary S is located in the 91° to 179° direction, the control unit 60 may set the reception direction to a range of 135° to 315° corresponding to the left direction and the downward direction. For example, the control unit 60 may change the reception range in this way depending on the position of the boundary S.

[0099] In the above description, the input signals in the four directions of the answer lever 21, up, down, left, and right, are allocated in the range of ±45° directions, but are not limited to this. For example, the allocation of the up, down, left, and right directions may be in the range of ±60°, etc. In this case, at a specific angle, two adjacent input signals are input in duplicate, but by preferentially acquiring one of them, control for adjusting the astigmatism axis angle and cylindrical power of the subject's eye E may be performed. [Explanation of symbols]

[0100] 1 Case 2 Presentation window 3 Speakers 10 Examiner's controller 20 Subject Controller 30 Projection optical system 40 Eye Refractive Index Measuring Unit 43 Inspection window 60 Control section 100 Self-examination device

Claims

1. an optotype presenting unit for presenting a test optotype to the subject's eye; an autocross cylinder lens for separately presenting the test target to the subject's eye; A drive control means for controlling the drive of the autocross cylinder lens; Equipped with A subjective optometry device for subjectively measuring astigmatism characteristics of the subject's eye, a response input means for inputting a response of a subject who visually recognizes the test target; an acquisition means for acquiring the astigmatism characteristic of the subject's eye based on an answer input direction indicating a direction in which the answer is input by the answer input means; a reception change means for changing a reception direction of the answer input direction for the acquisition means to acquire the astigmatism characteristics based on a boundary of the separation area, the boundary being changed in accordance with the control of the autocross cylinder lens by the drive control means; Equipped with The directions in which the answer can be input by the answer input means are all directions among the directions in which the test optotype is separated, The subjective eye examination device, characterized in that the reception change means changes the reception direction by corresponding the reception direction to at least one of the directions included in all the directions in accordance with the boundary of the separation area.

2. an optotype presenting unit for presenting a test optotype to the subject's eye; an autocross cylinder lens for separately presenting the test target to the subject's eye; A drive control means for controlling the drive of the autocross cylinder lens; Equipped with A subjective optometry device for subjectively measuring astigmatism characteristics of the subject's eye, a response input means for inputting a response of a subject who visually recognizes the test target; an acquisition means for acquiring the astigmatism characteristic of the subject's eye based on an answer input direction indicating a direction in which the answer is input by the answer input means; a reception change means for changing a reception direction of the answer input direction for the acquisition means to acquire the astigmatism characteristics based on a boundary of the separation area, the boundary being changed in accordance with the control of the autocross cylinder lens by the drive control means; an input control means for invalidating input of the answer by the answer input means from a direction different from the receiving direction; A subjective eye examination device comprising:

3. an optotype presenting unit for presenting a test optotype to the subject's eye; an autocross cylinder lens for separately presenting the test target to the subject's eye; A drive control means for controlling the drive of the autocross cylinder lens; Equipped with A subjective optometry program for use in a subjective optometry device that subjectively measures astigmatism characteristics of the subject's eye, comprising: The optometry program is executed by a processor, a response input step for inputting a response of a subject who visually recognizes the test optotype; an acquisition step of acquiring the astigmatism characteristic of the subject's eye based on an answer input direction indicating a direction in which the answer was input by the answer input step; a reception change step of changing the reception direction of the answer input direction for acquiring the astigmatism characteristics in the acquisition step based on a boundary of the separation area in which the test target is arranged separately via the autocross cylinder lens and which is changed in accordance with the control of the autocross cylinder lens by the drive control means; The subjective optometry device executes the above-mentioned The directions in which the answer can be input by the answer input step are all directions among directions in which the test optotype is separated, The subjective eye examination program, characterized in that the reception change step changes the reception direction by corresponding the reception direction to at least one of the directions included in all directions depending on the boundary of the separation area.

4. an optotype presenting unit for presenting a test optotype to the subject's eye; an autocross cylinder lens for separately presenting the test target to the subject's eye; A drive control means for controlling the drive of the autocross cylinder lens; Equipped with A subjective optometry program for use in a subjective optometry device that subjectively measures astigmatism characteristics of the subject's eye, comprising: The optometry program is executed by a processor, a response input step for inputting a response of a subject who visually recognizes the test optotype; an acquisition step of acquiring the astigmatism characteristic of the subject's eye based on an answer input direction indicating a direction in which the answer was input by the answer input step; a reception change step of changing the reception direction of the answer input direction for acquiring the astigmatism characteristics in the acquisition step based on a boundary of the separation area in which the test target is arranged separately via the autocross cylinder lens and which is changed in accordance with the control of the autocross cylinder lens by the drive control means; an input control step of invalidating input of the answer from a direction different from the receiving direction in the answer input step; A subjective optometry program that causes the subjective optometry device to execute the above steps.

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