Subjective optometry apparatus and subjective optometry program

Abstract

To provide a subjective optometry apparatus and a subjective optometry program capable of easily executing initial setting for each examination item in a subjective examination.SOLUTION: Provided is a subjective optometry apparatus for subjectively measuring optical characteristics of a subject's eye, which includes: optotype presenting means for presenting an examination optotype to an eye to be examined; correction means for changing optical characteristics of an optotype light flux emitted from the optotype presenting means; operation means; and control means for executing change of settings of the optotype presenting means and the correction means based on an operation signal from the operation means, wherein the operation means is operated during execution of a first measurement for a predetermined examination item, a change execution result when a setting of at least one of the optotype presenting means and the correction means is changed is obtained, and initial information for initially setting at least one of the optotype presenting means and the correction means when a second measurement is performed at timing different from that of the first measurement for the predetermined examination item is created based on the result of the change execution and stored in the memory means.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a subjective ophthalmic examination apparatus and a subjective ophthalmic examination program that subjectively measure the optical characteristics of an eye to be examined.

Background Art

[0002] There is known a subjective ophthalmic examination apparatus that measures the optical characteristics of an eye to be examined by arranging an optical member in front of the eye of the subject and presenting an examination target through the optical member to the eye to be examined (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The subjective examination of the eye to be examined is advanced by the examiner selecting the type of examination target each time for each predetermined examination item, or automatically switching to the type of examination target preset in advance. As an example, a red-green target is selected (or set) for spherical aberration examination, a dot pattern target is selected for astigmatism examination, a Landolt ring target is selected for visual acuity examination, and so on. Of course, not limited to such types of examination targets, the step width when changing the correction degree of the eye to be examined, the arrangement of auxiliary lenses including prisms and filters, etc. may also be selected (set).

[0005] However, the selection of the test target each time as described above had to be performed for each inspection item, which was time-consuming. Also, when the test target that the examiner wanted to use was different from the test target that was automatically switched, measures such as changing the settings in advance were required, which was also time-consuming. Similarly, for other items, setting changes were made each time or in advance, and the work was time-consuming. Note that since the ways of proceeding with the inspection items vary depending on the examiner, particularly in facilities where there are multiple examiners, the settings are changed each time the examiner changes, which was also a troublesome problem.

[0006] In view of the above problems, the present disclosure aims to provide a subjective ophthalmic apparatus and a subjective ophthalmic program that can easily execute the initial settings for each inspection item in subjective inspection.

Means for Solving the Problems

[0007] In order to solve the above problems, the present disclosure is characterized by having the following configuration. (1) The subjective ophthalmic apparatus according to the first aspect of the present disclosure includes a target presenting means for presenting a test target to an eye to be examined, a correcting means for changing the optical characteristics of the target light beam emitted from the target presenting means, an operating means, and a control means for executing changes in the settings of the target presenting means and the correcting means based on an operation signal from the operating means, and is a subjective ophthalmic apparatus for subjectively measuring the optical characteristics of the eye to be examined. During the execution of the first measurement for a predetermined inspection item, when the operating means is operated and at least one of the settings of the target presenting means and the correcting means is changed, an initial information creating means for creating initial information for setting at least one of the target presenting means and the correcting means at a timing different from the first measurement for the predetermined inspection item based on the change execution result and storing the initial information in a storage means is provided. (2) The subjective ophthalmic examination program according to the second aspect of the present disclosure includes a target presentation unit that presents an examination target to the eye to be examined, a correction unit that changes the optical characteristics of the target light beam emitted from the target presentation unit, and an operation unit, and is a subjective ophthalmic examination program used in a subjective ophthalmic examination device that subjectively measures the optical characteristics of the eye to be examined. When the operation unit is operated during the execution of the first measurement for a predetermined examination item and at least one of the settings of the target presentation unit and the correction unit is changed, the change execution result is obtained by being executed by a processor of the subjective ophthalmic examination device. When performing a second measurement at a timing different from the first measurement for the predetermined examination item, an initial information creation unit step for creating initial information for setting at least one of the target presentation unit and the correction unit initially based on the change execution result and storing the initial information in a storage unit is executed by the subjective ophthalmic examination device.

Brief Description of the Drawings

[0008]

Figure 1

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Modes for Carrying Out the Invention

[0009] <Overview> The overview of the subjective ophthalmic examination device according to the present embodiment will be described. The items classified in the following <> can be used independently or in combination.

[0010] <Target Presentation Unit> The subjective ophthalmic apparatus of this embodiment may include a target presenting means. The target presenting means presents an examination target to the eye to be examined. For example, the target presenting means may project a target light beam toward the eye to be examined in order to present the examination target to the eye to be examined.

[0011] For example, the target presenting means may be a display (for example, display 31). As an example, an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display, or the like may be used for the display. For example, the target presenting means may be a light source and a target plate. For example, the target presenting means may be a light source and a DMD (Digital Micromirror Device).

[0012] For example, the target light beam from the target presenting means may be directly guided toward the eye to be examined. Also, for example, the target light beam from the target presenting means may be guided via a light projecting optical system (for example, light projecting optical system 30) toward the eye to be examined. For example, the light projecting optical system may have at least one optical member for allowing the target light beam emitted from the target presenting means to pass therethrough. As an example, it may have at least any one of a lens, a mirror, or the like.

[0013] <Correction means> The subjective ophthalmic apparatus of this embodiment may include a correction means (for example, control unit 60). For example, the correction means changes the optical characteristics of the target light beam emitted from the target presenting means. For example, the optical characteristics of the target light beam may be at least any one of the spherical power, the cylindrical power, the astigmatic axis angle, or the like of the target light beam. For example, the correction means may include a correction optical system as a part of the configuration of the correction means. For example, the correction optical system is disposed in the optical path of the light projecting optical system and changes the optical characteristics of the target light beam.

[0014] For example, the corrective optical system may have a configuration that can change the optical characteristics of the target light beam. For example, the corrective optical system may change the spherical power of the target light beam by optically changing the presentation distance of the test target to the eye to be examined. Also, for example, the corrective optical system may change at least any one of the spherical power, cylindrical power, astigmatic axis angle, etc. of the target light beam by controlling the optical element. As an example, the optical element may be at least any one of a spherical lens, a cylindrical lens, a cross-cylinder lens, a rotary prism, a wavefront modulation element, a variable focus lens, etc. Of course, it may be an optical element different from these optical elements. Note that the corrective optical system may have a configuration that combines a configuration for changing the presentation distance of the test target and a configuration for controlling the optical element.

[0015] For example, the corrective optical system may be an eye refractive power measurement unit (for example, the eye refractive power measurement unit 40) that arranges an optical element in front of the eye to be examined. For example, the eye refractive power measurement unit may have a variable focus lens and be configured to change the refractive power of the variable focus lens. Also, for example, the eye refractive power measurement unit may have a lens disk in which a plurality of optical elements are arranged on the same circumference and a driving means (for example, a motor) for rotating the lens disk, and may be configured to electrically switch the optical elements by driving the driving means. Of course, the eye refractive power measurement unit may have a configuration that includes a variable focus lens, a lens disk, and a driving means.

[0016] Also, for example, the corrective optical system may be configured to change the optical characteristics of the target light beam by arranging an optical element between the target presentation means and the optical member for guiding the target light beam emitted from the target presentation means and controlling the optical element. That is, the corrective optical system may have the configuration of a phantom lens refractometer (phantom corrective optical system).

[0017] <Operating means> The subjective ophthalmic apparatus according to this embodiment may include operation means (for example, the examiner's controller 10). For example, the operation means inputs an operation signal for operating at least one of the target presenting means and the correction means. For example, the operation means may be capable of being input by an operator (for example, an examiner or an assistant). As an example, the operation means may be at least one of a switch, a touch panel, a mouse, a keyboard, and the like. When the operation means is a touch panel, the operation means may also serve as a display means.

[0018] For example, the operation means can input an operation signal for operating the target presenting means. For example, an operation signal for changing at least one of the type of the test target, the visual acuity value of the test target, the presentation distance of the test target, etc., to be displayed on the target presenting means may be inputtable. Also, the operation means can input an operation signal for operating the correction means. For example, it is sufficient if an operation signal for changing at least one of the correction degree for correcting the optical characteristics of the eye to be examined (as an example, at least one of the spherical degree, the cylindrical degree, the astigmatic axis angle, etc., for correcting the refractive power of the eye to be examined), the step width of the correction degree, the arrangement of the optical elements (as an example, the arrangement of the auxiliary lens), etc., can be input. Of course, the operation means may be able to input an operation signal for operating means different from the target presenting means and the correction means.

[0019] <Control means> The subjective ophthalmic apparatus according to this embodiment may include control means (for example, the control unit 60). For example, the control means executes a change in the settings of the target presenting means and the correction means based on the operation signal from the operation means. For example, the control means may change at least one of the settings such as the type of the test target, the visual acuity value of the test target, the presentation distance of the test target, etc., described above, by controlling the target presenting means based on the operation signal from the operation means. Also, for example, the control means may change at least one of the settings such as the correction degree of the eye to be examined, the step width of the correction degree, the arrangement of the optical elements, etc., described above, by controlling the correction means based on the operation signal from the operation means.

[0020] <Initial information creation means> The conscious ophthalmic apparatus of this embodiment may include an initial information creation means (for example, the control unit 60). For example, during the execution of the first measurement for a predetermined examination item of the eye to be examined, when the operation means is operated and at least one of the settings of the visual target presentation means and the correction means is changed, the initial information creation means obtains the change execution result, and when performing a second measurement at a timing different from the first measurement for the predetermined examination item, creates initial information for setting at least one of the visual target presentation means and the correction means based on the change execution result and stores it in the storage means. For example, thereby, the examiner can start the measurement of a predetermined examination item for the eye to be examined, proceed with the measurement while appropriately changing to the settings desired by the examiner, and further store the current various settings as they are as the initial settings for the predetermined examination item. As a result, the examiner can easily apply the initial settings in the measurement of subsequent examination items.

[0021] Note that the timing during the execution of the first measurement for a predetermined examination item may be any timing after obtaining the start signal for starting the measurement. For example, it may be the timing after obtaining the operation signal for designating the predetermined examination item as the start signal. Also, for example, it may be the timing after obtaining the control signal for controlling the visual target presentation means or the correction means to create the initial state in the predetermined examination item as the start signal.

[0022] Also, the change execution result when at least one of the settings of the visual target presentation means and the correction means is changed may be any information that can grasp that the change control based on the operation signal from the operation means has been executed. For example, the output result of the operation signal from the operation means may be obtained as the change execution result. Also, for example, the output result of the switching signal indicating that at least one of the settings of the visual target presentation means and the correction means has been switched in response to the operation signal from the operation means may be obtained as the change execution result. Also, for example, the comparison result of whether there is a difference between the initial information at the start of the measurement and the initial information at the end of the measurement may be obtained as the change execution result.

[0023] For example, the change execution result in which the setting is changed during the first measurement of a predetermined test item for the eye to be examined may be the type of test target presented by the target presenting means, which is the setting of the type of test target used in the predetermined test item, and the optical characteristics of the target light beam changed by the correction means, which is the setting of the optical characteristics of the target light beam switched in the predetermined test item. That is, it may be the change execution result related to at least any one of the settings. For example, in this case, considering the purpose of measuring the test item for the eye to be examined and the ease of answering of the subject, etc., the examiner can easily apply the setting changed to the type of test target and the optical characteristics of the target light beam desired during the measurement of the eye to be examined to the initial setting of the second measurement. Therefore, each measurement can be performed more smoothly.

[0024] Furthermore, for example, the setting of the optical characteristics of the target light beam changed by the above-described correction means may be at least any one of the step width of the correction degree for correcting the refractive power of the eye to be examined and the arrangement of the auxiliary lens in the optical path of the target light beam. For example, the step width of the correction degree may be the interval for changing the correction degree by a certain degree (in other words, the interval of the degree changed when switching the correction degree). Also, for example, the auxiliary lens may be a lens different from the lens for changing the correction degree of the eye to be examined. As an example, the auxiliary lens may be a shielding plate, a polarizing lens, 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. For example, in the second measurement, by making appropriate initial settings for the step width and the auxiliary lens, the measurement can be easily executed.

[0025] Of course, the initial information for the second measurement stored by the initial information creating means is not limited to the type of test target, the step width of the correction degree, the presence or absence of the arrangement of the auxiliary lens, etc., and may include other settings. As an example, it may include at least any one of the settings such as the black and white inversion of the test target, the lighting of the glare lamp, etc.

[0026] The initial information creation means of this embodiment may store the initial information in a storage means (for example, memory 70) in association with the identification information for identifying the examiner. For example, the identification information may be any information capable of identifying the examiner. As an example, it may be an ID assigned to each examiner, an administrative number used separately by examiners, or the like. For example, by storing different initial settings for each examiner in association with the identification information, it is possible to easily apply the initial settings desired by the examiner only by providing the identification information when measuring the examination items for the eye to be examined.

[0027] <Setting means> The subjective refractometer of this embodiment may include a setting means (for example, control unit 60). For example, at the start of the second measurement for a predetermined examination item of the eye to be examined, the setting means sets at least one of the visual target presentation means and the correction means based on the initial information created by the initial information creation means. For example, thereby, the initial setting in the measurement of subsequent examination items is automatically completed, so that the measurement can proceed smoothly. More specifically, when the examiner changes due to time zone or the like, the trouble of reflecting the examiner's preferred settings and the trouble of switching to the examiner's preferred settings each time the subject changes and the measurement is executed are saved, reducing the annoyance of the examiner and enabling the measurement to be performed smoothly.

[0028] For example, the setting means may switch at least one of the visual target presentation means and the correction means at the start of the second measurement according to the identification information. For example, thereby, different initial settings for the second measurement for each examiner are automatically reflected.

[0029] For example, when the autorefractor is not operated and a predetermined period has elapsed, the setting means may cancel the setting of at least one of the target presentation means and the correction means according to the initial information. For example, the predetermined period may be the elapsed time from the last operation of the autorefractor to the present. Also, for example, the predetermined period may be a regular period such as a predetermined date, a predetermined time (for example, morning and afternoon, a time zone designated by the examiner, etc.). Also, for example, the predetermined period may be a regular period based on calendar information such as day of the week, week, month, etc. For example, by automatically returning to a general setting such as the initial setting recommended in a store or the like when the initial setting desired by the examiner is cancelled, it becomes easier for other examiners to use the device. As an example, by returning parameters and the like to default values, it is possible to suppress the situation where the settings made by the previous examiner remain in an unintended form or the number of operations for reflecting the desired settings increases.

[0030] <Output means> The autorefractor of the present embodiment may include an output means (for example, the control unit 60). For example, the output means outputs guidance information for guiding the examiner to perform the operation of storing the initial information. For example, the guidance information may be configured to be able to indicate whether or not the examiner stores the initial information.

[0031] For example, the output means may control the display means to display the guidance information on the display means. The output means may show a message on the display means as the guidance information. Also, for example, the output means may show the guidance information by emphasizing the screen on the display means. As an example, it may be at least one of inversion or change of the screen color, blinking of the screen, change of the display size, etc. Also, for example, the output means may show the guidance information by showing a label (for example, at least one of a window, a mark, an icon, a character, a number, a symbol, etc.) on the display means. Of course, for example, the output means may further emphasize such a label.

[0032] Further, for example, the output means may control the voice generation means (as an example, the speaker 3) to cause the voice generation means to generate the guidance information as voice. Further, for example, the output means may control the notification means (as an example, a lamp) and represent the guidance information by lighting or blinking of the notification means. Further, for example, the output means may control the printing means (as an example, a printer) to cause the printing means to print the guidance information. Further, for example, the output means may control an external storage means (as an example, a memory, a server) and transmit the guidance information to the external storage means. Of course, for example, the output means may execute control combining these, or may execute control different from these.

[0033] Note that the present disclosure is not limited to the apparatus described in the present embodiment. For example, terminal control software (program) that performs the functions of the above embodiment may be supplied to an apparatus or a system via a network or various storage media, etc., and a control device (for example, a CPU, etc.) of the apparatus or system reads out and executes the program.

[0034] <Example> An example of the conscious ophthalmic apparatus according to the present embodiment will be described. In this example, a conscious ophthalmic apparatus integrally including a display that presents an inspection target to the eye to be examined and an eye refractive power measurement unit that changes the optical characteristics of the target light beam emitted from the display is illustrated. Of course, for example, the display may be provided as a separate housing from the conscious ophthalmic apparatus.

[0035] <Apparatus Appearance> FIG. 1 is an external view of the conscious ophthalmic apparatus 100. FIG. 1(a) shows a state in which the eye refractive power measurement unit 40 is supported at the standby position. FIG. 1(b) shows a state in which the eye refractive power measurement unit 40 is supported at the measurement position. For example, the conscious ophthalmic apparatus 100 includes a housing 1, a presentation window 2, a speaker 3, a holding unit 4, an examiner controller 10, an eye refractive power measurement unit 40, etc.

[0036] The housing 1 has a light projection optical system 30 inside. The presentation window 2 transmits the target light beam by the light projection optical system 30. The target light beam is projected onto the eye to be examined E through the presentation window 2. When an eye refractive power measurement unit 40 is disposed between the eye to be examined E and the presentation window 2 (see Fig. 1(b)), the target light beam is projected onto the eye to be examined E through the presentation window 2 and an inspection window 43 described later. Thereby, an inspection target is presented to the eye to be examined E. The speaker 3 outputs voice guidance and the like.

[0037] The holding unit 4 holds the eye refractive power measurement unit 40. For example, the holding unit 4 moves the arm by driving a drive unit (such as a motor) (not shown), thereby moving the eye refractive power measurement unit 40 connected to the arm. Thereby, the standby position and the measurement position of the eye refractive power measurement unit 40 are switched.

[0038] The examiner controller 10 is used for the examiner to operate the subjective refractometer 100. The examiner controller 10 includes a switch unit 11, a monitor 12, and the like. The switch unit 11 inputs signals for performing various settings (for example, movement of the eye refractive power measurement unit 40, etc.). The monitor 12 displays an operation screen described later. For example, various information (for example, the examination result of the eye to be examined E, etc.) may be displayed on the operation screen. Note that the monitor 12 may function as a touch panel that also serves as the switch unit 11. Signals from the examiner controller 10 are output to the control unit 60 by wired communication or wireless communication.

[0039] <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 distance vision examination. Fig. 2(b) shows the optical arrangement during near vision examination. The light projection optical system 30 projects a target light beam toward the eye to be examined E. For example, the light projection optical system 30 includes a display 31, a plane mirror 32, a concave mirror 33, a near / far switching unit 34, and the like.

[0040] The display 31 displays visual targets (for example, fixation targets, test visual targets, etc.). By forming an image of the visual target light beam emitted from the display 31 on the fundus of the eye E to be examined, the visual target is presented to the eye E to be examined. For example, the display 31 may be an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence), a plasma display, or the like.

[0041] The display 31 may be provided with a polarization optical member. For example, a polarization optical member may be disposed on the front surface of the display 31, or the polarization optical member may be incorporated into the display 31 and disposed integrally. Thereby, the display 31 can emit linearly polarized light or circularly polarized light having polarization in a predetermined direction (vertical direction, horizontal direction, or diagonal 45-degree direction, etc.).

[0042] The plane mirror 32 reflects the visual target light beam from the display 31 and guides it to the concave mirror 33. Also, the plane mirror 32 reflects the visual target light beam from the display 31 and guides it to the eye E to be examined. For example, the plane mirror 32 is arranged such that the distance (presentation distance) from the eye E to be examined to the display 31 is optically 40 cm during near vision examination of the eye E to be examined. Note that instead of the plane mirror 32, a reflecting member such as a prism, a beam splitter, or a half mirror can also be used.

[0043] 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 arranged such that the distance (presentation distance) from the eye E to be examined to the display 31 is optically 5 m during distance vision examination of the eye E to be examined. Note that instead of the concave mirror 33, a reflecting member such as an aspherical mirror or a free-form surface mirror can also be used. Also, instead of the concave mirror 33, a lens or the like can be used.

[0044] The far - near switching unit 34 switches the arrangement of the display 31 during the distance vision examination and the near vision examination of the eye to be examined E. For example, the far - near switching unit 34 moves the holding unit by driving a driving unit (such as a motor, not shown), thereby moving the display 31 held by the holding unit. As a result, the far - vision arrangement and the near - vision arrangement of the display 31 are switched.

[0045] For example, during the distance vision examination of the eye to be examined E, the display screen of the display 31 faces the back surface of the housing 1 (see Fig. 2(a)). The target light beam from the display 31 enters the plane mirror 32 passing through the optical axis L1, and is reflected by the plane mirror 32 in the direction of the optical axis L2. Further, it enters the concave mirror 33 passing through the optical axis L2, and is reflected by the concave mirror 33 in the direction of the optical axis L3. Further, it enters the plane mirror 32 passing through the optical axis L3, and is reflected by the plane mirror 32 in the direction of the optical axis L4. As a result, a target light beam that has passed through each optical member inside the housing 1 and is emitted outside the housing 1 is projected onto the eye to be examined E.

[0046] For example, during the near vision examination of the eye to be examined E, the display screen of the display 31 faces the upper surface of the housing 1 (see Fig. 2(b)). The target light beam from the display 31 enters the plane mirror 32 passing through the optical axis L3, and is reflected by the plane mirror 32 in the direction of the optical axis L4. As a result, a target light beam that has passed through each optical member inside the housing 1 and is emitted outside the housing 1 is projected onto the eye to be examined E.

[0047] <Eye refractive power measurement unit (corrective optical system)> Fig. 3 is a schematic diagram of the eye refractive power measurement unit 40. The eye refractive power measurement unit 40 measures the refractive power of the eye to be examined E subjectively. Also, the eye refractive power measurement unit 40 is used as a corrective optical system. The corrective optical system is arranged in the optical path of the light projecting optical system 30 and changes the optical characteristics of the target light beam. For example, the eye refractive power measurement unit 40 includes a forehead rest 41, a lens unit 42, an inspection window 43, a moving unit 44, etc.

[0048] The forehead rest 41 fixes the eye to be examined E at a predetermined examination position by abutting against the subject's head, and keeps the distance from the eye to be examined E to the inspection window 43 constant. The lens unit 42 has a pair of left and right lens units 42L and 42R. The lens unit 42 has inspection windows 43 (left inspection window 43L and right inspection window 43R).

[0049] 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) of 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 units 45 (left driving unit 45L and right driving unit 45R). Also, for example, the moving unit 44 adjusts the convergence angle of the left lens unit 42L and the right lens unit 42R by driving the driving unit 46. Note that for the detailed configuration of the moving unit 44, refer to, for example, Japanese Patent Application Laid-Open No. 2004-329345.

[0050] The lens unit 42 includes a lens disk 50 inside. The lens disk 50 has a pair of left and right lens disks 50L and 50R. The lens disk 50 is rotated by driving the driving units 51 (left driving unit 51L and right driving unit 51R). Also, the lens disk 50 arranges an aperture (or a 0D lens) and a plurality of optical elements 52 (left optical element 52L and right optical element 52R) on the same circumference. These optical elements are rotated by driving the driving units 53 (left driving unit 53L and right driving unit 53R). Thereby, a desired optical element 52 is switched and arranged at a desired angle at the inspection window 43.

[0051] The lens disk 50 consists of one lens disk or a plurality of 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 a plurality of spherical lenses with different spherical powers (spherical refractive powers). Also, as an example, the cylindrical lens disk may have a plurality of cylindrical lenses with different cylindrical powers (cylindrical refractive powers). Also, as an example, the auxiliary lens disk may have a shielding plate, a polarizing lens, a red filter / green filter, a dispersive prism, a Maddox lens, a rotary prism, a cross cylinder lens, an auto cross cylinder lens, an alignment lens, etc. The drive unit 51 and the drive unit 53 may be provided for each lens disk.

[0052] Note that the eye refractive power measurement unit 40 only needs to be able to change the optical characteristics of the target light beam. For example, it may be configured to control an optical element as in this embodiment. Also, for example, it may be configured to control a wavefront modulation element.

[0053] <Control Unit> FIG. 4 is a schematic diagram of the control system of the subjective ophthalmic apparatus 100. For example, the control unit 60 includes a CPU (processor), a RAM, a ROM, etc. For example, the CPU controls each member in the subjective ophthalmic apparatus 100. For example, the RAM temporarily stores various information. For example, the ROM stores various programs for controlling the operation of the subjective ophthalmic apparatus 100 and inspection target data, etc. As an example, a program for realizing an application (self-ophthalmic examination application) for automatically advancing the ophthalmic examination based on the answers input by the subject is stored. Note that the control unit 60 may be constituted by a plurality of control units (that is, a plurality of processors).

[0054] Connected to the control unit 60 are a speaker 3, a display 31, an examiner's controller 10, a non-volatile memory 70 (hereinafter referred to as the memory 70), and the like. Also connected to the control unit 60 are the drive unit of the holding unit 4, the drive unit of the zoom switching unit 34, the drive units of the eye refractive power measurement unit 40 (drive units 45, 46, 51, 53), and the like.

[0055] The memory 70 is a non-transitory storage medium that can retain stored content even when power supply is interrupted. For example, as the memory 70, a hard disk drive, a flash ROM, a USB memory, or the like can be used.

[0056] <Control operation> The control operation of the conscious ophthalmoscope 100 having the above configuration will be described.

[0057] <Alignment of the eye to be examined> The examiner operates the examiner's controller 10 to select a switch (not shown) for lowering the eye refractive power measurement unit 40. For example, the control unit 60 drives the drive unit of the holding unit 4 based on the output of an operation signal from the examiner's controller 10. For example, thereby, the eye refractive power measurement unit 40 moves to the inspection position (see Fig. 1(b)), and the eye refractive power measurement unit 40 is disposed on the optical axis L4.

[0058] Subsequently, the examiner aligns the eye E to be examined with the eye refractive power measurement unit 40. For example, the examiner instructs the subject to place their face against the forehead rest 41 and look through the inspection window 43. The subject looks into the inspection window 43 in response to the examiner's instruction. The examiner operates a forehead rest adjustment knob (not shown) so that the corneal vertex distance VD of the eye to be examined becomes a predetermined distance (for example, 12 mm), and adjusts the position of the forehead rest 41. Also, for example, the examiner operates the examiner's controller 10 to input the pupil distance PD of the eye E to be examined that has been measured in advance. For example, the control unit 60 drives the drive unit 45, adjusts the interval between the left and right lens units 42, and changes the interval of the inspection window 43 to match the pupil distance PD of the eye to be examined. Thereby, the alignment of the eye E to be examined is completed.

[0059] <Obtaining the objective refractive power of the eye to be examined> Subsequently, the examiner obtains the objective refractive power of the eye E to be examined. For example, the examiner obtains the objective refractive power measured in advance using an objective refractive power measuring device. For example, the examiner operates the examiner's controller 10 to input the subject ID and operates a predetermined switch. For example, based on the input signal from the switch, the control unit 60 outputs an operation signal to the objective refractive power measuring device so as to cause the objective refractive power associated with the subject ID to be transmitted. For example, when the control unit of the objective refractive power measuring device receives the subject ID from the autorefractor 100, it calls the objective refractive power corresponding to the subject ID from the memory and transmits it to the autorefractor 100. The control unit 60 of the autorefractor 100 obtains the objective refractive power of the eye E to be examined by receiving the objective refractive power transmitted from the objective refractive power measuring device.

[0060] Note that based on the objective refractive power of the eye E to be examined, the control unit 60 controls the eye refractive power measurement unit 40 to arrange a spherical lens or a cylindrical lens on the inspection window 43 so as to correct the eye E to be examined with a predetermined correction degree (for example, spherical degree, cylindrical degree, and astigmatism axis angle). For example, such a correction degree based on the objective refractive power of the eye to be examined is the initial value when starting the subjective measurement.

[0061] <Starting the subjective measurement of the eye to be examined> Subsequently, the examiner starts the subjective measurement of the eye E to be examined. For example, the examiner sequentially performs a spherical examination, an astigmatism examination, a visual acuity examination, etc. as the examination items for the subjective measurement of the eye E to be examined. Note that in the subjective measurement, examinations different from these examinations may be performed as examination items. For example, the spherical examination is an examination for adjusting the spherical degree set as the initial value of the eye E to be examined to an appropriate spherical degree using a red-green indicator. For example, the astigmatism examination is an examination for adjusting the cylindrical degree and the astigmatism axis angle set as the initial values of the eye E to be examined to appropriate cylindrical degrees and astigmatism axis angles using a radial target or a dot group target. For example, the visual acuity examination is an examination for measuring the highest visual acuity value in a state where the eye E to be examined is corrected with an appropriate spherical degree, an appropriate cylindrical degree, and an appropriate astigmatism axis angle.

[0062] In the subjective measurement of the eye E to be examined, for each examination item (such as spherical examination, astigmatism examination, visual acuity examination, etc.), the initial settings at the start of the examination are stored in the memory 70 in advance. For example, the initial settings for each examination item (hereinafter referred to as the first initial settings) may be settings that are generally used. As an example, it may be the settings at the time of shipment of the device, settings according to the rules of the store where the device is installed, etc. Also, for example, the items of the initial settings for each examination item may be the type of examination target presented to the eye to be examined, the step width for correcting the refractive power of the eye to be examined (that is, the interval of the refractive power that changes when switching the spherical power or the cylindrical power), whether to arrange the optical element of the auxiliary lens disk in the inspection window 43 of the refractive power measurement unit 40, etc. Of course, for example, the items of the initial settings for each examination item may include items different from these. As an example, it may include the reverse display of the examination target, the lighting of the glare lamp, etc.

[0063] <Selection of examination item> The examiner operates the examiner controller 10 to select the examination item to be performed on the eye E to be examined. For example, the examiner operates a button corresponding to the desired examination item from the examination item selection area 220 of the operation screen 200 described later, which is displayed on the monitor 12. For example, the examiner can start the spherical examination by operating the spherical examination button 221 for performing the spherical examination of the eye to be examined. Also, for example, after the spherical examination of the eye to be examined, the examiner can start the astigmatism examination by operating the astigmatism examination button 222 for performing the astigmatism examination. Also, for example, after the astigmatism examination of the eye to be examined, the examiner can start the visual acuity examination by operating the visual acuity examination button 223 for performing the visual acuity examination.

[0064] In the following description, the case where the astigmatism inspection button 222 is operated in the selection of inspection items will be taken as an example. For example, the control unit 60 calls the first initial setting for starting the astigmatism inspection from the memory 70 according to the input signal (in other words, the start signal) from the monitor 12. Also, for example, the control unit 60 controls the display 31 to display an inspection target corresponding to the first initial setting, and controls the eye refractive power measurement unit 40 to arrange an optical element corresponding to the first initial setting. Also, for example, the control unit 60 sets the step width for correcting the refractive power of the eye to be examined to the step width corresponding to the first initial setting.

[0065] In this embodiment, as the first initial setting when starting the astigmatism inspection, the display of the radiation target and the arrangement of the shielding plate for the non-measured eye are respectively reflected. Therefore, the control unit 60 displays the radiation target on the display 31 and arranges the shielding plate on the inspection window 43 on the non-measured eye side.

[0066] <Astigmatism inspection> After the examiner operates the astigmatism inspection button 222, the examiner starts a radiation test as the astigmatism inspection of the eye to be examined E. For example, the examiner can determine the approximate astigmatism axis angle of the eye to be examined E by asking the subject in which direction the radiation target can be clearly confirmed. However, for example, some examiners may want to perform a cross-cylinder test as the astigmatism inspection of the eye to be examined E to determine the exact astigmatism axis angle. In the cross-cylinder test, it is necessary to use a dot target and a cross-cylinder lens. Therefore, after the examiner starts the astigmatism inspection of the eye to be examined E (that is, during the execution of the measurement), the examiner operates the examiner's controller 10 to change the radiation target to a dot target and arrange the cross-cylinder lens on the inspection window 43.

[0067] <Change of settings during inspection> FIG. 5 is an example of an operation screen 200 displayed on the monitor 12 of the examiner's controller 10. For example, the operation screen 200 has a correction power 210, an inspection item selection button 220, a target selection area 230, an operation area 250, etc. The correction power 210 displays the current correction value (or measurement result) for correcting the eye E to be examined. The inspection item selection button 220 is a button for selecting (or switching) the inspection item to be performed on the eye E to be examined. For example, the inspection item selection button 220 has a spherical aberration inspection button 221, an astigmatism inspection button 222, a visual acuity inspection button 223, etc. The target selection button 230 is a button for selecting (or switching) the inspection target to be presented to the eye to be examined. For example, the target selection button 230 has a button for designating the red-green target used in spherical aberration inspection, a button for designating the radial target or dot group target used in astigmatism inspection, a button for designating the Landolt ring target or hiragana target used in visual acuity inspection, etc. The auxiliary lens selection button 240 is a button for selecting (or switching) the arrangement of the optical elements of the auxiliary lens disk. For example, the auxiliary lens selection button 240 has respective buttons for changing whether to arrange a red filter / green filter, a polarizing lens, a cross cylinder lens, etc. The operation area 250 can change the correction value for correcting the eye E to be examined by operating via the touch panel or the switch unit 11.

[0068] The examiner operates the dot group target button 231 for selecting the dot group target from the target selection button 230. The control unit 60 switches the display 31 to the display of the dot group target in response to the input signal from the dot group target button 231. Also, the examiner operates the cross cylinder lens button 241 for selecting the cross cylinder lens from the auxiliary lens selection button 240. The control unit 60 arranges a ±0.25D cross cylinder lens in the inspection window 43 in response to the input signal from the cross cylinder lens button 241. For example, thereby, the settings of the inspection target and the optical element desired by the examiner are reflected.

[0069] The examiner operates the operation area to change the axis angle of the cross-cylinder lens in order to sequentially present two dot-pattern targets to the eye under examination (measurement eye). The control unit 60 rotates the axis angle of the cross-cylinder lens based on the input signal from the operation area 250. The eye under examination is in a corrected state with the aforementioned initial value, and the dot-pattern targets are presented to the eye under examination in different visible ways before and after rotating the cross-cylinder lens. Next, the examiner operates the operation area to adjust the astigmatic axis angle of the eye under examination (measurement eye). For example, the examiner asks the subject which one of the two dot-pattern targets can be clearly recognized, and based on the subject's answer, operates the operation area 250 to appropriately change the astigmatic axis angle of the eye under examination from the initial value to a different value. The control unit 60 rotates the axis angle of the cylindrical lens based on the input signal from the operation area 250. The examiner repeats such rotation of the cross-cylinder lens and change of the astigmatic axis angle value until the subject answers that the two dot-pattern targets look about the same. Thereby, the final astigmatic axis angle (measurement result) for appropriately correcting the eye under examination is obtained.

[0070] When the examiner obtains the final astigmatic axis angle of the eye under examination, the examiner operates the operation area 250 to change the axis angle of the cross-cylinder lens in order to adjust the cylindrical power of the eye under examination. The control unit 60 rotates the axis angle of the cross-cylinder lens based on the input signal from the operation area 250. Next, the examiner operates the operation area to adjust the cylindrical power of the eye under examination (measurement eye). For example, the examiner asks the subject which one of the two dot-pattern targets can be clearly recognized, and based on the subject's answer, operates the operation area 250 to appropriately change the cylindrical power of the eye under examination from the initial value to a different value. The control unit 60 rotates the cylindrical lens disk to switch the arrangement of the cylindrical lenses based on the input signal from the operation area 250. The examiner repeats such rotation of the cross-cylinder lens and change of the cylindrical power value until the subject answers that the two dot-pattern targets look about the same. Thereby, the final cylindrical power (measurement result) for appropriately correcting the eye under examination is obtained.

[0071] The examiner performs a cross cylinder test as the astigmatism test on the test eye E, and when obtaining the final astigmatism axis angle and cylinder power of the test eye, the examiner operates a confirmation button (not shown) in the operation area 250 to end the measurement.

[0072] <Creation and storage of initial information> In the subjective ophthalmic apparatus 1 of the present embodiment, during the execution of the astigmatism test on the test eye E described above, initial information for setting various items changed from the first initial setting to the initial setting (hereinafter referred to as the second initial setting) when starting the astigmatism test after the next time can be created and stored. This will be described in detail.

[0073] For example, when the control unit 60 detects that the cross cylinder test has ended based on an input signal from the confirmation button, the control unit 60 acquires a change execution result in which any setting has been changed from the start to the end of the measurement. For example, the control unit 60 compares the first initial setting for the astigmatism test with the last setting when the confirmation button is operated at the end of the astigmatism test, and when the settings of one or more items are different, the control unit 60 acquires that there has been a change from the first initial setting as the change execution result. As an example, such item settings may be at least any one of the type of test target, the step width of the correction power, the arrangement of the auxiliary lens, the black and white inversion of the test target, the lighting of the glare lamp, and the like. That is, for example, when a difference is detected between the first initial setting and the last setting, the control unit 60 acquires the change execution result assuming that there has been a change from the first initial setting. In the present embodiment, the type of test target has been changed from a radial target to a point group target, and the fact that a cross cylinder lens is arranged in addition to the shielding plate is detected as a difference, whereby the change execution result is acquired.

[0074] Subsequently, when there is a difference between the first initial setting and the last setting (in other words, when the change execution result is acquired), the control unit 60 creates initial information for performing the second initial setting when starting the astigmatism test after the next time. That is, initial information for performing the second initial setting when the astigmatism test is performed at different timings such as when the subject changes is created.

[0075] For example, based on the difference between the first initial setting and the last setting, the control unit 60 creates second initial information in which the last setting is associated as the second initial setting, separately from the first initial information associated with the first initial setting. For example, at the start of the astigmatism inspection, the control unit 60 creates second initial information for reflecting each setting such as displaying a point cloud target and arranging a shielding plate and a cross cylinder lens. Also, for example, the control unit 60 stores the second initial information in the memory 70.

[0076] For example, when the examiner starts the astigmatism inspection after the next time, since the second initial information is called from the memory 70 by the examiner and the settings of various items desired by the examiner are applied at once, the initial setting is completed immediately. Of course, for example, when the examiner starts the astigmatism inspection after the next time, the control unit 60 can also call the second initial information from the memory 70 and automatically reflect the settings of various items desired by the examiner to immediately complete the initial setting.

[0077] <Initial setting after the next time> FIG. 6 is an example of a message screen 260 displayed on the operation screen 200. For example, on the message screen 260, a confirmation message 261, an OK button 262, a cancel button 263, etc. are displayed. In the confirmation message 261, a message for confirming whether to always apply the second initial setting as the initial setting of the astigmatism inspection after the next time is displayed. The OK button 262 is a button for approving the application of the second initial setting. The cancel button 263 is a button for rejecting the application of the second initial setting.

[0078] When the control unit 60 stores in the memory 70 the second initial information associated with the last setting (the second initial setting) in the astigmatism examination of the eye E to be examined, the control unit 60 causes the message screen 260 to be displayed on the operation screen 200. The examiner checks the confirmation message 261 and operates by selecting either the confirmation button 262 or the cancel button 263. For example, when the examiner always wants to apply the second initial setting as the initial setting for subsequent astigmatism examinations, the examiner operates the confirmation button 262. Based on the input signal from the confirmation button 262, the control unit 60 associates it so that the second initial setting, instead of the first initial setting, is called as the initial setting when the astigmatism examination button 222 is operated. For example, by this, when the examiner measures another subject to be examined, when the astigmatism examination button 222 is operated again, the second initial setting is automatically reflected. Also, for example, when the examiner wants to keep the initial setting for subsequent astigmatism examinations as the first initial setting, the examiner operates the cancel button 263. Based on the input signal from the cancel button 263, the control unit 60 maintains the state associated so that the first initial setting is called as the initial setting when the astigmatism examination button 222 is operated. For example, by this, even if the examiner operates the astigmatism examination button 222 again, the first initial setting is reflected.

[0079] <Cancellation of Initial Setting> In the subjective ophthalmic apparatus 1 of the present embodiment, after the second initial setting is associated instead of the first initial setting in the astigmatism examination of the eye E to be examined, when no input signal is received from the examiner controller 10 and a predetermined time has elapsed, the association of the second initial setting may be cancelled. Then, when starting the astigmatism examination of the eye E to be examined, the settings of various items may be restored so that the first initial setting is made. For example, when a plurality of examiners belong to a facility or store where the subjective ophthalmic apparatus 100 is installed, different examiners may perform measurements on a daily or hourly basis using the same subjective ophthalmic apparatus. For this reason, for example, by using the period when the subjective ophthalmic apparatus 100 is not used and restoring the settings of various items, it may be easier to reflect the settings desired by the examiner.

[0080] FIG. 7 is an example of a message screen 270 displayed on the operation screen 200. For example, on the message screen 270, a confirmation message 271, an OK button 272, a cancel button 273, etc. are displayed. The confirmation message 271 displays a message for confirming whether to cancel the second initial setting associated as the initial setting for the astigmatism inspection. The OK button 272 is a button for approving the cancellation of the second initial setting. The cancel button 273 is a button for rejecting the cancellation of the second initial setting.

[0081] The control unit 60 is a timing mechanism (e.g., a calendar timer, etc.) (not shown) provided in the autorefractor 100, and measures the elapsed time from the time when the input signal was last obtained from the examiner controller 10 to the current time. Further, when the control unit 60 reaches a predetermined elapsed time (e.g., 1 hour, etc.) preset in a facility or a store, it causes the message screen 270 to be displayed on the monitor 12. For example, the examiner checks the confirmation message 271 and selects and operates either the OK button 272 or the cancel button 273. For example, when the examiner wants to return the initial setting of the astigmatism inspection to the first initial setting, the examiner operates the OK button 272. The control unit 60 associates the first initial setting so as to be called as the initial setting when the astigmatism inspection button 222 is operated, based on the input signal from the OK button 272. For example, thereby, when the examiner operates the astigmatism inspection button 222 at the next timing, the first initial setting is automatically reflected. Also, for example, when the examiner wants to maintain the second initial setting as the initial setting of the astigmatism inspection, the examiner operates the cancel button 273. The control unit 60 maintains the state in which the second initial setting is associated so as to be called as the initial setting when the astigmatism inspection button 222 is operated, based on the input signal from the cancel button 273. For example, thereby, even when the examiner operates the astigmatism inspection button 222 at the next timing, the second initial setting is reflected.

[0082] For example, when the cancel button 273 is operated, the control unit 60 may measure again the elapsed time from the time when the input signal from the cancel button 273 was obtained or the time when the input signal was last obtained to the current time. Also, for example, when a predetermined time elapses again to the elapsed time, the control unit 60 may similarly cause the message screen 270 to be displayed on the monitor 12.

[0083] As described above, for example, the conscious-type ophthalmic apparatus according to the present embodiment includes a target presenting unit that presents an examination target to the eye to be examined, a correction unit that changes the optical characteristics of the target light beam emitted from the target presenting unit, an operation unit, and a control unit that executes changes in the settings of the target presenting unit and the correction unit based on an operation signal from the operation unit. During the execution of the first measurement for a predetermined examination item, when the operation unit is operated and at least one of the settings of the target presenting unit and the correction unit is changed, the control unit acquires the change execution result, and when performing a second measurement at a timing different from the first measurement for the predetermined examination item, an initial information creation unit that creates initial information for performing at least one of the initial settings of the target presenting unit and the correction unit based on the change execution result and stores the initial information in the storage unit. As a result, the examiner can start the measurement of a predetermined examination item for the eye to be examined, proceed with the measurement while appropriately changing the settings as desired by the examiner, and further store the current various settings as they are as the initial settings for the predetermined examination item. As a result, in the measurement of the examination items after the next time, the examiner can use the initial settings that leave the operation feeling of the examiner. In addition, compared with the case of using the initial settings performed before starting the measurement of a predetermined examination item as in the prior art, when using the initial settings based on the operation during the actual measurement as in the present embodiment, the optimal initial settings can be easily made for the examiner, so the measurement can proceed smoothly.

[0084] Also, for example, when the subjective ophthalmic apparatus of the present embodiment starts the second measurement for a predetermined examination item of the eye to be examined, it includes setting means for setting at least one of the visual target presenting means and the correction means based on the initial information created by the initial information creating means. For example, thereby, the initial setting in the measurement of the examination items after the next time is automatically completed, so that the measurement can proceed smoothly. More specifically, when the examiner changes due to time zones or the like, the trouble of reflecting the examiner's preferred settings and the trouble of switching to the examiner's preferred settings each time the subject changes and the measurement is executed are saved, reducing the annoyance of the examiner and enabling smooth measurement.

[0085] Also, for example, in the subjective ophthalmic apparatus of the present embodiment, the change execution result in which the setting is changed during the first measurement of a predetermined examination item of the eye to be examined is the type of examination visual target presented by the visual target presenting means, which is the setting of the type of examination visual target used in the predetermined examination item, and the optical characteristics of the visual target light beam changed by the correction means, which is the setting of the optical characteristics of the visual target light beam switched in the predetermined examination item. For example, considering the purpose of the measurement of the examination item by the examiner (as an example, screening for refractive abnormalities or determination of prescription values), the ease of the subject's response, etc., the setting changed by the examiner to the type of examination visual target and the optical characteristics of the visual target light beam desired during the measurement of the eye to be examined is set as the initial setting for the next time and subsequent times, so that each measurement can be performed more smoothly.

[0086] Also, for example, in the subjective ophthalmic apparatus of the present embodiment, the setting means releases the setting of at least one of the visual target presenting means and the correction means according to the initial information when the subjective ophthalmic apparatus is not operated and a predetermined period has elapsed. For example, in this way, the initial setting desired by the examiner is released, and by automatically returning to a general setting such as the initial setting recommended at a store or the like, it becomes easier for other examiners to use the apparatus. As an example, by returning parameters and the like to the default values, it is possible to suppress the situation where the settings by the previous examiner remain in an unintended form or the number of operations for reflecting the desired settings increases.

[0087] <Modified Example> In this embodiment, taking the astigmatism examination of the eye E to be examined as an example, the change from the first initial setting to the second initial setting, the storage of the second initial setting in the memory 70, and the association of the second initial setting with the astigmatism examination were described, but the present invention is not limited thereto. Of course, similarly in the spherical examination or visual acuity examination of the eye E to be examined, the examiner may also make changes, storage, association, etc. to the initial setting as desired.

[0088] In this embodiment, from the start to the end of the astigmatism examination (cross cylinder test) of the eye E to be examined, a configuration using a cross cylinder lens of ±0.25 D was taken as an example for explanation, but the present invention is not limited thereto. For example, during the execution of the astigmatism examination of the eye E to be examined, it is also possible to change to a cross cylinder lens of ±0.50 D. For example, in this case, the examiner may operate the auxiliary lens selection button 240 to change the setting so that a cross cylinder lens of ±0.50 D is arranged in the inspection window 43. For example, the control unit 60 switches and arranges the cross cylinder lens according to the input signal from the auxiliary lens selection button 240. For example, thereby, the setting of the cross cylinder lens desired by the examiner is reflected. Note that the examiner may use, as the arrangement of the auxiliary lens when starting the astigmatism examination after the next time, a second initial setting that maintains the arrangement of the cross cylinder lens of ±0.25 D, or a second initial setting that changes to the arrangement of the cross cylinder lens of ±0.50 D. Of course, it is also possible to make a selection as to whether to maintain the arrangement of the cross cylinder lens of ±0.25 D or change to the arrangement of the cross cylinder lens of ±0.50 D, and store the second initial information for making the second initial setting.

[0089] In this embodiment, in the astigmatism examination of the eye E to be examined, a configuration for changing the type of the examination target and the arrangement of the auxiliary lens and storing second initial information for performing a second initial setting has been described as an example, but the present invention is not limited thereto. For example, in the astigmatism examination of the eye E to be examined, a configuration for changing the step width of the correction degree for correcting the refractive power of the eye to be examined (here, the cylinder power) and storing the second initial information may be adopted. As an example, a configuration may be adopted in which the cylinder power of the eye to be examined is changed at intervals different from 0.25 D (for example, at intervals of 0.125 D) from the setting in which the cylinder power is changed at intervals of 0.25 D.

[0090] Of course, not limited to the astigmatism examination of the eye E to be examined, in the spherical examination, a configuration for changing the step width of the correction degree for correcting the spherical power and storing the second initial information may be adopted. For example, as the spherical examination of the eye E to be examined, a red-green test may be executed. For example, as the first initial setting when starting the red-green test, the step width may be set so that the spherical power changes every 0.25 D. However, the examiner may operate the operation area 250 during the execution of the red-green test to change the setting so that the step width of the spherical power changes at intervals different from 0.25 D (for example, at intervals of 0.125 D). The control unit 60 may create second initial information for setting the step width of the spherical power changed from the first initial setting as the second initial setting when starting the spherical examination after the next time, and store it in the memory 70.

[0091] Thus, for example, in the subjective ophthalmic apparatus of the present embodiment, the setting of the optical characteristics of the target light beam that the correction means changes is at least one of the step width of the correction degree for correcting the refractive power of the eye to be examined and the arrangement of the auxiliary lens in the optical path of the target light beam. For example, during the measurement of the eye to be examined, the examiner may set a desired step width. As an example, the step width may be changed in order to clarify the difference in the appearance of a plurality of test targets visually recognized by the eye to be examined or to obtain a more accurate measurement result for the eye to be examined. For example, in subsequent measurements, by always applying such a changed step width as the initial setting, a measurement that is easy for the subject to answer or a highly accurate measurement can be easily performed. Also, for example, since the auxiliary lens used for the eye to be examined differs for each test item, the measurement can be easily performed by making an initial setting such that the auxiliary lens is appropriately arranged in subsequent measurements.

[0092] In the present embodiment, the configuration in which the test item of the subjective measurement performed on the eye to be examined E is changed by operating the test item selection button 220 has been described as an example, but the present invention is not limited thereto. For example, the test item of the subjective measurement performed on the eye to be examined E may be configured to be changed by operating each button in the target selection area 230. More specifically, test targets available for each test item may be determined, and the switching of the test item may be detected by designating the test target.

[0093] For example, in this case, first initial information associating a first initial setting such as a step width for correcting the test eye E and the arrangement of optical elements of the auxiliary lens disk with respect to the test target presented to the test eye E may be stored in the memory 70. Also, for example, in this case, as the second initial setting when the same test target is selected after the next time (i.e., when measuring a predetermined test item), second initial information associating the step width and the setting of the optical element changed during the execution of the predetermined test item may be stored in the memory 70. Thereby, when the examiner next operates each button in the target selection area 230 and selects an arbitrary test target, the examiner can easily call and reflect the desired second initial setting.

[0094] In this embodiment, a configuration in which second initial information associating a second initial setting is stored in the memory 70 has been described as an example separately from the first initial information associating the first initial setting of a predetermined test item, but the present invention is not limited to this. For example, the second initial information associating the second initial setting of a predetermined test item may be configured to be stored in the memory 70 in association with identification information for identifying the examiner. For example, the identification information of the examiner may be a unique ID assigned to each examiner, a management number used separately by the examiners, or the like.

[0095] For example, when the identification number of the examiner is the examiner ID, the examiner may operate the examiner controller 10 to input his or her own examiner ID. For example, based on the input signal from the examiner controller 10, the control unit 60 may call the second initial information associated with the examiner ID and apply the second initial setting when starting the measurement of a predetermined test item. Also, for example, when the identification number of the examiner is the management number, the examiner may operate the examiner controller 10 to input the number assigned to himself or herself. For example, based on the input signal from the examiner controller 10, the control unit 60 may refer to the corresponding number from among a plurality of numbers, call the second initial information associated with that number, and apply the second initial setting when starting the measurement of a predetermined test item.

[0096] As described above, for example, in the subjective ophthalmic apparatus of the present embodiment, the initial information creation means stores the initial information in association with the identification information for identifying the examiner, and the setting means switches at least one of the settings of the target presentation means and the correction means according to the identification information. Conventionally, in the case where a plurality of examiners use one apparatus, for example, every time the examiner changes, there has been the trouble of changing to the preferred settings of the examiner. However, in the subjective ophthalmic apparatus of the present embodiment, by associating different initial settings for each examiner with information that can identify the examiner (for example, an examiner-specific ID, a management number that is used separately by examiners, etc.), it is possible to easily apply the initial settings desired by the examiner only by giving the identification information when measuring the examination items for the eye to be examined.

[0097] In the present embodiment, the configuration of obtaining the change execution result by detecting the difference between the first initial setting and the last setting in the measurement of a predetermined examination item for the eye to be examined has been described as an example, but it is not limited thereto. For example, in the measurement of a predetermined examination item for the eye to be examined, the change execution result may be obtained based on an operation signal that can identify that the setting of one or more items has been changed from the first initial setting.

[0098] Here, the case of changing the examination target from a radiation target to a point group target in the astigmatism examination of the eye to be examined E will be exemplified. For example, when the control unit 60 acquires an input signal from the point group target button 231, the control unit 60 may acquire a change execution result indicating that the setting of the examination target has been changed. Further, for example, when the control unit 60 acquires a switching signal for switching the display 31 to the display of the point group target, the control unit 60 may acquire a change execution result indicating that the setting of the examination target has been changed. Further, for example, when the control unit 60 acquires a completion signal indicating that the switching to the display of the point group target on the display 31 has been completed, the control unit 60 may acquire a change execution result indicating that the setting of the examination target has been changed.

[0099] In this embodiment, an example has been described in which, for a predetermined inspection item of the eye E to be examined, second initial information for reflecting the second initial setting when starting measurement after the next time is created, and the second initial information is automatically stored in the memory 70. However, the present invention is not limited to this. For example, a configuration in which the second initial information is stored in the memory 70 using an operation such as an operation area 250 by an examiner as a trigger may be employed. For example, in this case, a storage button for storing the predetermined inspection item and the second initial information in association with each other may be provided. When the examiner finishes measuring a predetermined inspection item and wishes to store the second initial information associated with the last setting as the second initial setting, the examiner may operate the storage button. The control unit 60 may store the second initial information in the memory 70 based on an input signal from the storage button.

[0100] Also, in this embodiment, guidance information for guiding the examiner to store the second initial information in the memory 70 may be output. As an example, the control unit 60 may display, on the operation screen 200 as the guidance information, a message for confirming whether to store the second initial information in the memory 70. For example, the examiner may operate an OK button or a cancel button according to the content of the message to determine whether to store the second initial information in the memory 70.

[0101] Thus, for example, the subjective-type ophthalmic apparatus according to the present embodiment includes output means for outputting guiding information for guiding the examiner to perform a storage operation of initial information. For example, by this, the examiner can easily determine, using the guiding information, whether to apply various settings appropriately changed during the measurement of a predetermined examination item for the test eye as initial settings for the measurement of subsequent examination items. As an example, when the examiner changes from a state in which the initial settings for a predetermined examination item are reflected to another setting (second setting) that is at least partially different from the initial setting (first setting), etc., it is possible to easily set whether to apply the first setting or the second setting to the measurement of subsequent examination items. Note that, since such guiding information is output to the examiner, the examiner can remember the second setting without forgetting it as needed, so the possibility of the need for re-setting during measurement is reduced.

Description of Reference Numerals

[0102] 1 housing 2 display window 3 speaker 10 examiner controller 30 light projection optical system 40 eye refractive power measurement unit 43 inspection window 60 control unit 100 subjective-type ophthalmic apparatus

Claims

1. A target presenting means for presenting a test target to the eye to be examined, A correction means for changing the optical characteristics of the target light beam emitted from the target presenting means, An operation means, A control means for executing a change in the settings of the target presenting means and the correction means based on an operation signal from the operation means, having, An subjective optometry device for subjectively measuring the optical characteristics of the eye to be examined, During the execution of the first measurement for a predetermined test item, when the operation means is operated and at least one of the settings of the target presenting means and the correction means is changed, an initial information creating means for creating initial information for setting at least one of the target presenting means and the correction means at a timing different from the first measurement for the predetermined test item based on the change execution result and storing the initial information in a storage means, An subjective optometry device characterized by comprising.

2. In the subjective optometry device according to Claim 1, A setting means for setting at least one of the target presenting means and the correction means based on the initial information created by the initial information creating means at the start of the second measurement for the predetermined test item. An subjective optometry device characterized by comprising.

3. In the subjective optometry device according to Claim 1 or 2, The change execution result in which the setting is changed during the first measurement of the predetermined test item is, The type of test target presented by the target presenting means, which is the setting of the type of test target used in the predetermined test item, The optical characteristics of the target light beam changed by the correction means, which is the setting of the optical characteristics of the target light beam switched in the predetermined test item, An subjective optometry device characterized by being a change execution result related to at least one of the settings.

4. In the subjective refractometer according to claim 3, the setting of the optical characteristics of the target light beam changed by the correction means is at least one of a step width of a correction degree for correcting the refractive power of the eye to be examined and an arrangement of an auxiliary lens in the optical path of the target light beam. A subjective refractometer characterized by the above.

5. In the subjective refractometer according to any one of claims 1 to 4, the initial information creation means stores the initial information in association with identification information for identifying an examiner, the setting means switches at least one of the settings of the target presentation means and the correction means according to the identification information. A subjective refractometer characterized by the above.

6. In the subjective refractometer according to any one of claims 1 to 5, An output means for outputting guidance information for guiding the examiner to store the initial information. A subjective refractometer characterized by the above.

7. In the subjective refractometer according to any one of claims 1 to 6, when the subjective refractometer is not operated and a predetermined period has elapsed, the setting means releases at least one of the settings of the target presentation means and the correction means according to the initial information. A subjective refractometer characterized by the above.

8. A target presentation means for presenting a test target to the eye to be examined, A correction means for changing the optical characteristics of the target light beam emitted from the target presentation means, An operation means, having, A subjective refraction program used in a subjective refractometer for subjectively measuring the optical characteristics of the eye to be examined, By being executed by a processor of the subjective refractometer, During the execution of the first measurement for a predetermined inspection item, when the operation means is operated and the setting of at least one of the visual target presentation means and the correction means is changed, an initial information creation means step for creating initial information for setting at least one of the visual target presentation means and the correction means when performing a second measurement at a timing different from the first measurement for the predetermined inspection item based on the change execution result and storing it in the storage means is executed by the subjective refractometer. A subjective refraction program characterized by that.

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