JP7647074B2 - Subjective optometry device and subjective optometry program - Google Patents

Description

The present disclosure relates to a subjective optometry device and a subjective optometry program for subjectively measuring the astigmatism characteristics of a subject's eye.

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, using such a subjective optometry device, the astigmatism characteristics of the subject's eye can be measured by performing a cross cylinder test on the subject's eye.

In cross cylinder testing, 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.

Japanese Patent Application Publication No. 5-176893

Conventionally, tests are conducted by the examiner being present with the subject, asking the subject which direction of the test target is clearly visible. For example, the examiner can guide the subject's answer by asking questions, and even if the subject is unsure of the answer, the examiner can verbally guide the subject to make it easier to select the direction of the test target.

Recently, however, so-called self-eye examinations, in which the examinee conducts the eye examination by himself (i.e. operates the controller by himself), have been considered as a mechanism for easily conducting subjective examinations of the examinee's eyes. When applying the auto cross cylinder method to self-eye examinations, it has been noticed that, depending on the state of the test optotype separated (for example, when the test optotype is separated into the upper right and lower left), the examinee may become confused about how to operate the controller and find it difficult to respond.

In view of the above-mentioned conventional techniques, the technical objective of the present disclosure is to provide a subjective eye examination device and a subjective eye examination program that can easily perform a cross cylinder test on the subject's eye.

In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) A subjective optometry device according to a first aspect of the present disclosure 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 is a subjective optometry device that subjectively measures astigmatism characteristics of the eye to be examined, the subjective optometry device further includes an answer input unit that inputs an answer of a subject who visually recognizes the test optotype, an acquisition unit that acquires the astigmatism characteristics of the eye to be examined based on an answer input direction that indicates a direction in which the answer is input by the answer input unit, and a measurement unit that measures 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 the 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 means for presenting a test optotype to an eye to be examined, an autocross cylinder lens for separately presenting the test optotype to the eye to be examined, and a drive control unit for controlling the drive of the autocross cylinder lens, and that subjectively measures astigmatism characteristics of the eye to be examined. When the optometry program is executed by a processor, the following steps are performed: an answer input step for inputting an answer of a subject who visually recognizes the test optotype; an acquisition step for acquiring the astigmatism characteristics of the eye to be examined based on an answer input direction indicating the direction in which the answer was input by the answer input step ; and The subjective eye examination device is caused to execute a separation area that is separated and arranged by using a cross cylinder lens, and a reception change step that changes the reception direction of the answer input direction for acquiring the astigmatism characteristics based on the boundary of the separation area that is changed in accordance with the control of the auto cross cylinder lens by the drive control means, and the directions in which the answer can be input by the answer input step are all of the directions in which the test target is separated, and the reception change step changes the reception direction by corresponding the reception 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 means for presenting a test optotype to an eye to be examined, an autocross cylinder lens for separately presenting the test optotype to the eye to be examined, and a drive control unit for controlling the drive of the autocross cylinder lens, and that subjectively measures astigmatism characteristics of the eye to be examined. When the optometry program is executed by a processor, an answer input step for inputting an answer of a subject who visually recognizes the test optotype, and an answer input step for inputting an answer of a subject who visually recognizes the test optotype, and an answer input step for inputting an answer of a subject who visually recognizes the test optotype, the ... The subjective eye examination device executes an acquisition step for acquiring the astigmatism characteristics of the test eye based on the input direction, a reception change step for changing the reception 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 control of the autocross cylinder lens by the drive control means, and an input control step for invalidating input of the answer from a direction different from the reception direction by the answer input step.

FIG. 1 is an external view of a subjective optometry device. FIG. 2 is a schematic diagram of a projection optical system. FIG. 2 is a schematic diagram of an eye refractive power measuring unit. 2 is a schematic diagram of a control system of the subjective optometry device 100. FIG. FIG. 13 is a diagram illustrating a direction in which a response input is accepted. FIG. 13 is a diagram illustrating a range of response input directions.

＜Overview＞
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.

The subjective eye examination 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 the cylinder power, the astigmatism axis angle, etc. Of course, the subjective eye examination 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.

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

<Target Presentation Means>
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.

For example, the optotype presenting means may be a display (e.g., 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.

For example, the visual target light beam from the visual target presenting means may be emitted directly toward the subject's eye. Also, for example, the visual target light beam from the visual target presenting means may be indirectly guided toward the subject's eye via a light projection optical system (for example, light projection optical system 30). For example, the light projection optical system may have at least one optical member through which the visual target light beam emitted from the visual target presenting means passes. As an example, it may have at least one of a lens, a mirror, etc.

<Correction measures>
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.

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 separating and presenting the test visual target to the subject's eye.

As an example, the corrective optical system may have an optical element, and the optical characteristics 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.

As another example, the correction optical system may change the optical characteristics of the visual target light beam by optically changing the presentation position (presentation distance) of the visual target relative to the subject's eye. In this case, the visual 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.

As another example, the correction optical system may have an optical element disposed between an optical member for guiding the visual target light beam from the light projection optical system toward the subject's eye and the visual target presenting means, and the optical element may be controlled to change the optical characteristics of the visual target light beam. In other words, the correction optical system may be a phantom lens refractometer (phantom correction optical system).

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 placed in front of the subject's eye. That is, the correction optical system may be an eye examination unit (e.g., eye refractive power measurement unit 40). For example, the eye examination unit may have a lens disk on which multiple 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).

<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.

The drive control means may control the drive of an autocross cylinder lens possessed by 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 examination window (e.g., examination window 43). This makes it possible to change the boundary of the separation area in which the examination visual targets are separated.

<How to enter answers>
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, the subject controller 20).

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 directions approximately up, down, left, and right. 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 add other directions (for example, diagonal directions) to the up, down, left, and right directions. As an example, it may be eight directions including upper right, lower right, upper left, lower left, and upper 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.

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 because input in the direction corresponding to the selected test target is possible regardless of the separation state of the test target.

The answer input means may be provided integrally with the housing of the subjective optometry device. The answer input means may also be provided separately from the housing of the subjective optometry device.

<Method of acquisition>
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 (i.e., the optical characteristics of the target light beam) of the correction means (corrective optical system).

<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.

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 in the boundary of the separation area. The reception change means may change the reception direction each time the position of the boundary of the separation area is changed. For example, the reception direction may change each time depending on the angle of the boundary of the separation area. The reception change means may also change the reception direction each time the position of the boundary of the separation area is changed in a certain area. For example, the reception direction may not be changed when the angle of the boundary of the separation area is changed within a first area, and the reception direction may be changed when the angle is changed from the first area to a second area different from the first area. 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 input from the answer input means in the predetermined direction is acquired as an input signal representing the answer input direction by the answer input means.

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, depending on the position of the boundary, the reception direction may be associated with only one direction, or may be associated with two directions, for the test optotype. 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 (i.e., 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, the test optotype selected by the subject is appropriately determined, especially when a controller or the like is used that limits the subject's operation and makes answer input easy.

The reception change means may also 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 reception directions each time the position of the boundary of the separation area is changed, or may change the range of reception directions each time the position of the boundary of the separation area is changed by a fixed area.

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 acquired as an input signal representing the answer input direction by the answer input means.

As an 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 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 intuitive operation of the subject is used, the test optotype selected by the subject is appropriately determined.

<Input Control Means>
The subjective eye examination device in this embodiment may include an input control means (e.g., 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.

The input control means invalidates the input so that processing for acquiring astigmatism characteristics by the acquisition means is not performed in response to input of an answer from the answer input means. For example, the input control means may invalidate input from a direction different from the accepted direction by prohibiting acceptance of the answer input direction input from the answer input means. Also, for example, the input control means may invalidate input from a direction different from the accepted 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.).

Note that 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 can be supplied to a system or device via a network or various storage media, and the control device (e.g., a CPU) of the system or device can read and execute the program.

<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.

Fig. 1 is an external view of a subjective optometry apparatus 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.

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, etc.

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

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

The subject controller 20 is used to input the subject's answers. 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.

<Light 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.

The display 31 displays a visual target (e.g., a fixation target, a test visual target, etc.). The visual target light beam emitted from the display 31 is imaged 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.

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 positioned 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 reflective member such as a prism, a beam splitter, or a half mirror.

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 positioned so that during a distance test of the subject's eye E, the distance (presentation distance) from the subject's eye E to the display 31 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. It is also possible to use a lens or the like instead of the concave mirror 33.

The distance switching unit 34 switches the position of the display 31 during a distance test and a near test of the subject's eye E. For example, the distance switching unit 34 moves the holding unit by driving a drive unit (motor, etc.) not shown, thereby moving the display 31 held by the holding unit. This allows the display 31 to be switched between a distance position and a near position.

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 component inside the housing 1 and is emitted to the outside of the housing 1 is projected onto the subject's eye E.

For example, during a near vision test of the subject's eye E, the display screen of the display 31 is directed toward the top 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, where it is reflected in the direction of the optical axis L4. As a result, the visual target light beam that passes through each optical component inside the housing 1 and is emitted to the outside of the housing 1 is projected onto the subject's eye E.

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

The forehead rest 41 holds the subject's head against it to fix the subject's eye E in 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 (left examination window 43L and right examination window 43R).

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 drive unit 45 (left drive unit 45L and right drive 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 drive unit 46. For a detailed configuration of the moving unit 44, please refer to, for example, JP 2004-329345 A.

The lens unit 42 has a lens disk 50 inside. 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 arranges an opening (or a 0D lens) and multiple optical elements 52 (left optical element 52L and right optical element 52R) 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 arranged in the inspection window 43 at the desired angle.

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, an alignment lens, etc. The driving unit 51 and the driving unit 53 may be provided for each lens disk.

The eye refractive power measurement unit 40 may be configured to change the optical characteristics of the visual target light beam. For example, as in this embodiment, it may be configured to control an optical element. It may also be configured to control a wavefront modulation element, for example.

<Control Unit>
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 part 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).

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

Memory 70 is a non-transient storage medium that can retain its contents even if the power supply is cut off. For example, memory 70 can be a hard disk drive, a flash ROM, a USB memory, etc.

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

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 for the left eye is obtained by the objective test. Also, for example, based on the objective value for the left eye, a subjective test is performed on the left eye in a state where the left eye is corrected to a specified ocular refractive power (0D, etc.) with a specified correction power (i.e., the initial state), and a subjective value for 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 way, and the objective and subjective values for the right eye are obtained.

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

In this embodiment, the cross cylinder test, which is one of 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 angles match. For example, if there is a difference in the appearance of the two point cloud targets, it is determined that the 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.

<Cross cylinder inspection procedure>
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, the case where the left eye is the measurement eye and the right eye is the non-measurement eye is taken as an example.

At the start of the cross cylinder test, the control unit 60 generates audio guidance from the speaker 3, which indicates how to operate the subject controller 20. As an example, audio guidance 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.

The control unit 60 then 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, an autocross cylinder lens is a lens with two prism regions that are divided into two with the lens center as the axis and are given cylindrical power so that the astigmatism axes are perpendicular to each other. The control unit 60 also 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 its screen.

The subject places his/her forehead against 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 below) 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.

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 to the subject.

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 type of 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.

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 properly correct the left eye. It also 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. It also generates a voice guide from the speaker 3, for example, asking the subject which direction of the point cloud target is clearly visible.

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 also generates a voice guide again asking about the direction of the point cloud target. The control unit 60 repeats this type of control until it receives an input signal from the answer button 22. This adjusts the cylindrical power of the subject's eye E.

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

<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).

In a self-eye examination where the examiner is not present with the subject, the positional relationship of the two point cloud optotypes may make it difficult for the subject to input answers. It is preferable that the subject controller 20 for self-eye examination has a simple configuration so that the subject can easily operate it by himself/herself. For example, it is preferable that the controller 20 is configured to allow input in eight directions, up/down, left/right, and diagonal directions, or that the controller 20 is configured to allow input in four directions, up/down, left/right, etc.

In this embodiment, an example is given of a case where 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. Note that the same problem is also likely to occur when the point cloud target is located at 135°, 225°, 315°, etc.

For this reason, the control unit 60 changes the acceptance direction for accepting 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 acceptance direction is changed so that the answer input direction is regarded as a predetermined input direction. This will be explained in detail below.

Figure 5 is a diagram explaining the direction of receiving the answer input direction. Figure 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. Figure 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 Figure 5(a), the boundary S is located vertically 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, and the point cloud target A is arranged in the 0° direction and the point cloud target B is arranged in the 180° direction. Also, for example, in FIG. 5(b), the boundary S is located in the 135° and 315° directions, and point cloud target A is positioned in the 45° direction and point cloud target B is positioned in the 225° direction so that separation area Pa and separation area Pb are separated into the upper right and lower left in the field of view of the subject eye E.

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. For point cloud target B, the 180° and 270° directions are considered to be the reception directions Kb.

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, it generates a conversion signal that converts this 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 sees 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 sees 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.

In addition, since the input signals of the up and down directions on the answer lever 21 are directions that do not correspond to either the reception direction Ka or the reception direction Kb, processing may be performed to invalidate this input signal. As an example, processing may be performed to reject the reception of the input signal, not generate a conversion signal based on the input signal, etc.

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 according to 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) correspond 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, because the leftward input signal and the downward 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 point cloud target B.

When the control unit 60 acquires a conversion signal corresponding to the direction of the point cloud target based on the input signal from the response 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 adjusted appropriately.

As described above, for example, the subjective eye examination device in this embodiment changes the receiving direction of the answer input direction, which indicates the direction in which the subject who viewed the test optotype entered an answer, based on a 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 multiple separated test optotypes changes during a cross cylinder test during self-eye examination, causing the subject to be confused about how to enter an answer, or even if the subject has difficulty entering an answer (for example, when input from the controller is only possible in a specific direction), the input direction of the subject's answer can be appropriately associated with the direction of the selected test optotype.

In addition, for example, the subjective eye examination 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 depending on 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 operations and makes answer input easy.

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 for the examiner and the examinee to communicate with each other, making it difficult to input an answer. For example, when the point cloud optotype is located at 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 misses the voice guidance, the examinee may intuitively operate the lever. For example, the answer lever 21 may be tilted 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.

In addition, 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 prevents the eye examination program for 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, the test is less likely to have to be repeated, and the test time can be shortened.

<Example of transformation>
In this embodiment, the answer lever 21 is described as being tiltable in only 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. 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.

Here, the cross cylinder test only requires that the examiner knows which of the two point cloud targets he or she has selected, and the direction of the point cloud target and the tilt direction of the answer lever 21 do not necessarily need to be the same. In other words, the tilt direction of the answer lever 21 only needs to roughly match the direction of the point cloud target. For this reason, for example, if the answer lever 21 is configured to be tiltable in all directions, a predetermined range may be provided in the reception direction that receives an input signal due to the tilt of 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 reception direction (reception range). As an example, the predetermined range may be ±45°.

Figure 6 is a diagram 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 Figure 6 and the state in which the two point cloud targets are located are the same as those in Figure 5. For example, as in Figure 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 for the point cloud target A may be in the range of 0° to 45° and 315° to 360°. For the point cloud target B, the acceptance range Kd may be in the range of 135° to 225°. Also, as in Figure 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 for the point cloud target A may be in the range of 0° to 90°. For the point cloud target B, the acceptance range Kd may be in the range of 180° to 270°.

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

In FIG. 6(b), for example, when the examiner clearly sees 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 sees 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.

Of course, in Figures 6(a) and 6(b), the control unit 60 may also perform processing to invalidate an input signal that is not included in the reception range Kc or the reception range Kd.

For example, the subjective eye examination 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 depending on the boundary of the separation area where the test optotypes are separated. This makes it possible to properly determine the test optotype selected by the subject, even when using a controller or the like that allows input by intuitive operation of the subject.

In this embodiment, the acceptance range for accepting an input signal from the response lever 21 is an angle of ±45°, but is not limited to this. 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 a range having an angle other than ±45° based on the position of the point cloud target. In addition, the acceptance range may be a range having an asymmetric angle on either side of the point cloud target.

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 depending on the position of the boundary S. For example, as 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 in FIG. 6(b), when the boundary S of the separation area is diagonal, 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 diagonal, the acceptance range may be ±90°.

In this embodiment, the configuration has been described with an 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 this is not limiting. 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 input signals in four directions, up, down, left, and right, may also be input. As an example, input signals in the four directions may be assigned to a range of ±45° based on the horizontal and vertical directions.

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

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.

In the above, the input signals for the four directions of up, down, left, and right on the response lever 21 are assigned in the range of ±45° directions, but this is not limited to this. For example, the assignment of up, down, left, and right may be in the range of ±60°, etc. In this case, at a certain angle, two adjacent input signals are input in duplicate, but by preferentially acquiring one of them, control may be performed to adjust the astigmatism axis angle and cylindrical power of the subject eye E.

REFERENCE SIGNS LIST 1 Housing 2 Presentation window 3 Speaker 10 Examiner controller 20 Examinee controller 30 Light projection optical system 40 Eye refractive power measuring unit 43 Test window 60 Control unit 100 Subjective eye examination device

Claims (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 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. 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: 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,
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 steps,
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 direction included in all directions depending on the boundary of the separation area. 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,
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-mentioned.