JP7098880B2 - Subjective optometry device and subjective optometry program - Google Patents

Description

The present disclosure relates to a subjective optometry device and a subjective optometry program that subjectively measure the optical characteristics of an eye to be inspected.

Conventionally, as a subjective optometry device, for example, a correction optical system capable of correcting the refractive index is individually arranged in front of the subject's eyes, and an examination target is projected onto the fundus of the subject's eye via the correction optical system. Is known (see Patent Document 1). In response to the subject's response, the examiner adjusts the correction optical system until the target looks appropriate to the subject, obtains the correction value, and measures the refractive power of the subject's eye based on this correction value. .. Further, for example, in a subjective optometry device, an inspection target via a corrective optical system forms an image in front of the subject's eyes, and the refractive power of the subject's eye is measured without arranging the corrective optical system in front of the eyes. Is known (Patent Document 2).

Japanese Unexamined Patent Publication No. 5-176893 US Pat. No. 3,874774

By the way, in the subjective optometry device, the optical characteristics of the optometry subject may change due to a cause such as the accommodation function of the optometry object working while the optical characteristics of the optometry object are being subjectively measured. It has been difficult to accurately measure the optical characteristics of the eye to be inspected when subjective measurement is performed in a state where such optical characteristics have changed.

In view of the above problems, it is a technical subject of the present disclosure to provide a subjective optometry apparatus capable of accurately measuring the optical characteristics of an optometry subject when the optical characteristics of the optometry object are subjectively measured. ..

In order to solve the above problems, the present invention is characterized by having the following configurations.

(1 ) The subjective eye examination device according to the first aspect of the present disclosure is arranged in the optical path of the projection optical system that projects the target light beam toward the eye to be inspected, and corrects the optical property of the target light beam. It is a subjective eye inspection device that has an optical system, has a subjective measurement means for subjectively measuring the optical characteristics of the eye to be inspected, and subjectively measures the optical characteristics of the eye to be inspected, and is a fundus of the eye to be inspected. It has a measurement optical system that emits measurement light and receives the reflected light, and objectively measures the optical characteristics of the eye to be inspected by an objective measurement means and a subjective measurement means of the eye to be inspected. The control means includes a control means for objectively measuring the optical characteristics of the eye to be inspected by the objective measurement means while the optical characteristics are subjectively measured, and the control means is the objective measurement. The other An acquisition means for objectively measuring the optical characteristics of the eye to be inspected by a sensory measuring means to acquire the second optical characteristics, and acquiring adjustment information based on the first optical characteristics and the second optical characteristics, and the above-mentioned An output means for outputting adjustment information is provided, the correction optical system is arranged in the optical path of the measurement optical system, and the eye to be inspected is measured by the objective measurement means based on the correction information by the correction optical system. It is characterized by comprising a second correction means for correcting the measurement result obtained by objectively measuring.
(2 ) The subjective eye examination program according to the second aspect of the present disclosure has a measurement optical system that emits measurement light to the fundus of the eye to be inspected and receives the reflected light, and objectively perceives the optical characteristics of the eye to be inspected. Objective measuring means for measuring objectively, a projection optical system for projecting a target light beam toward the eye to be inspected, and an optical path of the projection optical system, which are arranged in the optical path of the measurement optical system. A correction optical system that changes the optical characteristics of the target light beam, and a subjective measuring means for subjectively measuring the optical characteristics of the eye to be inspected are provided, and the optical characteristics of the eye to be inspected are subjectively measured. It is a subjective eye examination program used in the subjective eye examination device to measure, and by being executed by the processor of the subjective eye examination device, the optical characteristics of the eye to be inspected are subjectively measured by the subjective measurement means. While this is a control step for objectively measuring the optical characteristics of the eye to be inspected by the objective measuring means, the optical characteristics of the eye to be inspected are objectively measured by the objective measuring means. While acquiring the first optical characteristic and subjectively measuring the optical characteristic of the eye to be inspected by the subjective measuring means, the objective measuring means objectively measures the optical characteristic of the eye to be inspected. A control step for acquiring the second optical characteristic by measuring the optics, an acquisition step for acquiring the adjustment information based on the first optical characteristic and the second optical characteristic, an output step for outputting the adjustment information, and the correction optics. To cause the subjective eye examination device to perform a second correction step of objectively measuring the eye to be inspected by the objective measurement means and correcting the measurement result obtained based on the correction information by the system. It is characterized by.

It is an external view of the subjective optometry apparatus. It is a figure explaining the structure of the measuring means. It is a schematic block diagram which looked at the inside of the subjective optometry apparatus from the front direction. It is a schematic block diagram which looked at the inside of the subjective optometry apparatus from the side direction. It is a schematic block diagram which looked at the inside of the subjective optometry apparatus from the upper surface direction. It is a flowchart explaining the flow of a control operation. It is a flowchart explaining the flow of the control operation of the initial value setting.

Hereinafter, one of the typical embodiments will be described with reference to the drawings. 1 to 7 are diagrams for explaining the subjective optometry device and the subjective optometry program according to the present embodiment. In the following description, a subjective optometry device will be described as an example. The items classified by <> below can be used independently or in relation to each other.

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 following embodiments is supplied to a system or an apparatus via a network or various storage media. Then, a system or a control device of the device (for example, a CPU or the like) can read and execute the program.

In the following description, the depth direction of the subjective eye examination device (the front-back direction of the subject when measuring the subject) is perpendicular to the Z direction and the depth direction (the subject when measuring the subject). The horizontal direction on the plane (horizontal direction of the subject) will be described as the X direction, and the vertical direction (vertical direction of the subject when measuring the subject) will be described as the Y direction. It should be noted that R and L attached to the following reference numerals indicate those for the right eye and those for the left eye, respectively.

<Overview>
For example, the subjective optometry device (for example, the subjective optometry device 1) in the present embodiment includes a subjective measurement means. Further, for example, the subjective optometry device includes objective measuring means. Further, for example, a control means (for example, a control unit 70) is provided.

<Awareness measuring means>
For example, the subjective measuring means subjectively measures the optical characteristics of the eye to be inspected. For example, the optical characteristics of the eye to be measured that are subjectively measured include optical power (for example, spherical power, astigmatic power, astigmatic axis angle, etc.), contrast sensitivity, binocular vision function (for example, oblique amount, stereoscopic vision, etc.). Functions, etc.), etc.

For example, the subjective measuring means includes a floodlight optical system (for example, a floodlight optical system 30). Further, for example, the projection optical system projects the target luminous flux toward the eye to be inspected. Further, for example, the subjective measurement means includes a correction optical system (for example, a correction optical system 60, a subjective measurement optical system 25). For example, the correction optical system is arranged in the optical path of the projection optical system and changes the optical characteristics of the target luminous flux. It should be noted that the projection optical system does not need to be integrally provided in the subjective measuring means, and a device provided with the projection optical system may be separately provided. That is, the subjective measurement means in the present embodiment may be configured to include at least a correction optical system.

<Light projection optical system>
For example, a floodlight optical system has a light source that projects a luminous flux. Further, for example, the projection optical system may have at least one or more optical members that guide the target luminous flux projected from the light source that projects the target luminous flux toward the eye to be inspected.

For example, a display (for example, display 31) may be used as the light source for projecting the luminous flux. For example, as a display, an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence), or the like is used. For example, an inspection target such as a Randold ring optotype is displayed on the display.

For example, a light source and a DMD (Digital Micromirror Device) may be used as the light source for projecting the luminous flux. Generally, DMD has high reflectance and is bright. Therefore, the amount of light of the target luminous flux can be maintained as compared with the case of using a liquid crystal display using polarization.

For example, the light source for projecting the luminous flux may be configured to include a visible light source for presenting an optotype and an optotype plate. In this case, for example, the optotype is a rotatable disc plate and has a plurality of optotypes. The plurality of optotypes include, for example, a visual acuity test optotype used at the time of subjective measurement. For example, as a visual acuity test target, visual acuity values (visual acuity values 0.1, 0.3, ..., 1.5) are prepared for each visual acuity value. For example, the optotype plate is rotated by a motor or the like, and the optotypes are switched and arranged on an optical path in which the optotype luminous flux is guided to the eye to be inspected. Of course, as the light source for projecting the luminous flux, a light source other than the above configuration may be used.

<Correcting optical system>
For example, the correction optical system may be configured to change the optical characteristics of the visual target light flux (for example, at least one of spherical power, cylindrical power, cylindrical axis, polarization characteristics, aberration amount, and the like). For example, the optical element may be controlled as a configuration for changing the optical characteristics of the luminous flux. For example, the optical element may be configured to use at least one of a spherical lens, a cylindrical lens, a cross cylinder lens, a rotary prism, a wavefront modulation element, and the like. Of course, for example, as the optical element, an optical element different from the above-mentioned optical element may be used.

For example, the correction optical system may have a configuration in which the spherical power of the subject's eye is corrected by optically changing the presentation position (presentation distance) of the optotype with respect to the subject's eye. In this case, for example, the configuration in which the presentation position (presentation distance) of the optotype is optically changed may be such that the light source (for example, the display) is moved in the optical axis direction. Further, in this case, for example, an optical element (for example, a spherical lens) arranged in the optical path may be configured to move in the optical axis direction. Of course, the correction optical system may have a configuration in which a configuration for controlling the optical element and a configuration for moving the optical element arranged in the optical path in the optical axis direction are combined.

For example, the corrective optical system may be an optometry unit (folopter) in which optical elements arranged in front of the eye to be inspected are switched and arranged. For example, the optometry unit has a lens disk in which a plurality of optical elements are arranged on the same circumference and a driving means for rotating the lens disk, and the optical element is driven by the driving means (for example, a motor). May be configured to be electrically switched.

For example, as a correction optical system, an optical element is arranged between an optical member for guiding a target light beam from a projection optical system toward an eye to be inspected and a target display means to control the optical element. By doing so, the optical characteristics of the optotype light beam may be changed. That is, as the correction means, a phantom lens refractometer (phantom correction optical system) may be configured. In this case, for example, the target luminous flux corrected by the correction optical system is guided to the eye to be inspected via the optical member.

<Objective measuring means>
For example, the subjective optometry device in the present embodiment includes objective measuring means. For example, the objective measuring means objectively measures the optical characteristics of the eye to be inspected. For example, objectively measured optical characteristics of the eye to be inspected include optical power (for example, spherical power, astigmatic power, astigmatic axis angle, etc.), polarization characteristics, lens thickness information, and the like. In this embodiment, an objective measuring means for measuring the refractive power of the eye to be inspected will be described as an example. For example, the objective measurement means includes a measurement optical system (for example, the objective measurement optical system 10) that emits the measurement light to the fundus of the eye to be inspected and receives the reflected light. For example, the optical characteristics of the eye to be measured objectively include at least one of the imaging result (imaging image) captured by the objective measuring means and the parameter acquired by analyzing the imaging result. There may be. That is, the optical characteristics of the eye to be measured objectively may be based on the image pickup result captured by the objective measurement means.

For example, the objective measurement means may have a pair of left and right measurement optical systems for the right eye to be inspected and a measurement optical system for the left eye to be inspected. In this case, for example, the measurement optical system for the right eye to be inspected and the measurement optical system for the left eye to be inspected may be measured at substantially the same time. Further, in this case, for example, the measurement optical system for the right eye to be inspected and the measurement optical system for the left eye to be inspected may be measured at different timings. For example, the different timing may be the timing at which the measurement of one of the measurement optical system for the right eye to be inspected and the measurement optical system for the left eye to be inspected is completed. Further, for example, the different timing may be performed while the measurement of one of the measurement optical system for the right eye to be inspected and the measurement optical system for the left eye to be inspected is being carried out.

Further, for example, the objective measuring means may allow the measurement of the left and right eyes to be measured by one measuring optical system. In this case, for example, the measurement light is emitted to the fundus of one eye to be inspected to measure the eye to be inspected, and when the measurement of one eye is completed, the measurement light can be emitted to the fundus of the other eye to be inspected. It may be configured to make adjustments and measure the other eye to be inspected.

<Measurement optical system>
For example, the measurement optical system is a projection optical system that projects the measurement light from the light source toward the subject's eye fundus, and an image pickup optical system that captures the reflected light acquired by the reflection of the measurement light on the fundus of the eye with an image pickup device. Has a system and. For example, the measurement optical system may be an optical system for measuring the refractive power of the eye to be inspected. In this case, for example, as a measurement optical system, a spot-shaped measurement index is projected onto the fundus of the eye to be inspected through the central part of the pupil of the eye to be inspected, and the fundus reflected light reflected from the fundus is passed through the peripheral part of the pupil. An example is a configuration in which the image is taken out in a ring shape and the image pickup element is made to image a ring-shaped fundus reflection image. Further, in this case, for example, as a measurement optical system, a ring-shaped measurement index is projected from the peripheral portion of the pupil onto the fundus, the reflected light from the fundus is taken out from the central portion of the pupil, and the image pickup element is made to image the ring-shaped reflected image of the fundus. The configuration is mentioned. Further, in this case, for example, the measurement optical system may be configured to include a Shack-Hartmann sensor. Further, in this case, for example, the measurement optical system may have a configuration having a phase difference method of projecting a slit onto the eye to be inspected.

<Acquisition of objective measurement results during subjective measurement>
In the present embodiment, for example, the control means objectively measures the optical characteristics of the eye to be inspected by the objective measuring means while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means. .. For example, when objectively measuring the optical characteristics of the eye to be inspected by the objective measuring means, the subjective measurement of the optical characteristics of the eye to be inspected by the subjective measuring means may be continued. Further, for example, when objectively measuring the optical characteristics of the eye to be inspected by the objective measuring means, the subjective measurement of the optical characteristics of the eye to be inspected by the subjective measuring means is temporarily stopped. May be good. In this case, when the objective measurement is completed by the objective measuring means, the subjective measurement of the optical characteristics of the eye to be inspected by the subjective measuring means may be restarted.

For example, in the present embodiment, a configuration is provided in which the optical characteristics of the eye to be inspected are objectively measured by the objective measurement means while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measurement means. Therefore, it is possible to capture the change in the optical characteristics of the eye to be inspected during the subjective measurement from the objective measurement result. This allows the examiner to make a subjective measurement in consideration of the change in the optical characteristics of the eye to be inspected during the subjective measurement. Therefore, when the examiner subjectively measures the optical characteristics of the eye to be inspected, the examiner can accurately measure the optical characteristics of the eye to be inspected.

For example, when the optical characteristics of the eye to be inspected are objectively measured by the objective measuring means while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means, the control means is at least. The optical characteristics of the eye to be inspected may be objectively measured by objective measuring means while performing one or more subjective tests.

For example, at least one subjective test includes a case where one subjective test is performed and a case where a plurality of subjective tests are performed. Note that, for example, one subjective test may be a test that subjectively measures at least one optical characteristic of the eye to be inspected.

For example, when one subjective test is being performed, the objective measuring means objectively changes the optical characteristics of the eye to be inspected while the control means is performing one subjective test by the subjective measuring means. It may be measured.

For example, when a plurality of subjective tests are performed, the control means may be used by the objective measuring means to measure the eye to be inspected while the subjective measuring means is performing the subjective test of one of the plurality of subjective tests. The optical characteristics may be objectively measured. Further, for example, when a plurality of subjective tests are performed, the control means is subjected to the objective measuring means between the first subjective test and the second subjective test by the subjective measuring means. The optical characteristics of the optometry may be objectively measured. In this case, for example, the first subjective test and the second subjective test may be a subjective test for measuring the same optical characteristics, or the first subjective test and the second subjective test may measure different optical characteristics. It may be a subjective test of.

For example, the subjective optometry device includes a transmitting means for transmitting an objective measurement start trigger signal for initiating an objective measurement by an objective measuring means, and a receiving means for receiving the objective measurement start trigger signal. You may. For example, when an objective measurement start trigger signal is transmitted by the transmitting means and an objective measurement start trigger signal is received by the receiving means, the control means is performing an at least one subjective test. The optical characteristics of the eye to be inspected are objectively measured by an objective measuring means. For example, the objective measurement by the objective measuring means may be started manually or automatically.

For example, in the case of a configuration in which the start of the objective measurement is manually performed, a start switch is provided as a transmission means for transmitting the objective measurement start trigger signal for starting the objective measurement to the subjective optometry device. For example, when the start switch is selected by the examiner, the objective measurement start trigger signal is transmitted. For example, when the objective measurement start trigger signal is received by the receiving means, the control means may start the measurement by the objective measurement means. For example, as a configuration for objectively measuring the optical characteristics of the eye to be inspected by an objective measuring means while performing at least one subjective test, at least one objective measurement is performed. You can do it. That is, for example, as a configuration for objectively measuring the optical characteristics of the eye to be inspected by the objective measuring means while performing at least one subjective test, the minimum number of measurements is one, etc. Optometric measurements may be performed, or the maximum number of measurements may be constant (real-time) objective measurements.

For example, if one wants to perform an objective measurement, the examiner can select the start switch once while performing at least one subjective test to perform the objective measurement. It may be done.

Further, for example, when it is desired to perform objective measurement multiple times, the examiner selects the start switch multiple times while performing at least one subjective test, so that the objective measurement is performed multiple times. Measurement may be performed. Further, for example, when it is desired to perform objective measurement multiple times, the examiner selects the start switch once while performing at least one subjective test, so that the objective measurement is performed multiple times. Measurement may be performed.

In addition, for example, when a plurality of objective measurements are performed by outputting one objective measurement start trigger signal, the examiner may perform at least one subjective test. By selecting the start switch once, the objective measurement may be performed a preset number of times. Further, for example, when a plurality of objective measurements are performed by outputting one objective measurement start trigger signal, the examiner may perform at least one subjective test. By selecting the start switch once, the objective measurement may be performed at a preset timing. Further, for example, when a plurality of objective measurements are performed by outputting one objective measurement start trigger signal, the examiner may perform at least one subjective test. By selecting the start switch once, the measurement may be constantly performed and the objective measurement may be performed in real time.

For example, in the case of a configuration in which the start of objective measurement is automatically performed, after the subjective test is started, the control means controls the transmission means and transmits the objective measurement start trigger signal at a preset timing. do. For example, when the objective measurement start trigger signal is received by the receiving means, the control means may start the measurement by the objective measurement means. In the present embodiment, the control of the transmission means is performed by the control means, but the control thereof is not limited to this. For example, it may be implemented by separately providing a control means different from the control means.

For example, the preset timing includes a state in which the subjective measurement is started (for example, a state in which the projection of the target luminous flux is started, a state in which the inspection program is started, and a state in which the operation unit of the subjective inspection device is started. , When the driving of the corrective optical system is started, etc.), when a preset time has elapsed (for example, when a predetermined time has elapsed from the start of subjective measurement), when switching inspection targets, subjective examination and subjective examination (When performing multiple subjective tests), when the subject responds to the subjective test (when the examiner performs an operation based on the subject's answer), and so on. .. Of course, the objective measurement start trigger signal may be output at a timing other than the above description.

For example, as a configuration for objectively measuring the optical characteristics of the eye to be inspected by an objective measuring means while performing at least one subjective test, at least one objective measurement is performed. You can do it. That is, for example, as a configuration for objectively measuring the optical characteristics of the eye to be inspected by the objective measuring means while performing at least one subjective test, the minimum number of measurements is one, etc. Optometric measurements may be performed, or the maximum number of measurements may be constant (real-time) objective measurements.

For example, if you want to perform objective measurement once, you can output the objective measurement start trigger at a preset timing while performing at least one subjective test. The measurement by the formula measuring means may be started.

Further, for example, when it is desired to perform objective measurement multiple times, the objective measurement start trigger is output at a preset timing while at least one subjective test is being performed. Multiple objective measurements may be performed. In this case, for example, even if a plurality of objective measurements are performed by outputting a plurality of objective measurement start trigger signals while performing at least one subjective test. good. In this case, for example, even if one objective measurement start trigger signal is output while performing at least one subjective test, a plurality of objective measurements are performed. good.

In addition, for example, when a plurality of objective measurements are performed by outputting one objective measurement start trigger signal, one objective measurement is performed while at least one subjective test is performed. By outputting the objective measurement start trigger, the objective measurement may be performed a preset number of times. Further, for example, when a plurality of objective measurements are performed by outputting one objective measurement start trigger signal, one objective measurement is performed while at least one subjective test is performed. By outputting the objective measurement start trigger, the objective measurement may be performed a plurality of times at a preset timing. Further, for example, when a plurality of objective measurements are performed by outputting one objective measurement start trigger signal, the constant measurement is performed and the objective measurement is performed in real time. You may try to go.

<Acquisition of adjustment information>
For example, in the present embodiment, the control means objectively measures the optical characteristics of the eye to be inspected by the objective measuring means to acquire the first optical characteristics, and the subjective measuring means measures the optical characteristics of the eye to be inspected. While the measurement is performed subjectively, the optical characteristics of the eye to be inspected are objectively measured by the objective measuring means to acquire the second optical characteristics.

For example, in the present embodiment, the subjective optometry device may include acquisition means. For example, in this embodiment, the subjective optometry device may include output means. For example, the acquisition means acquires adjustment information based on the first optical characteristic and the second optical characteristic. For example, the output means outputs adjustment information. For example, in the present embodiment, the first optical characteristic is objectively measured and the second optical characteristic is objectively measured while the optical characteristic of the eye to be inspected is subjectively measured. get. The adjustment information based on the acquired first optical characteristic and the second optical characteristic is acquired, and the adjustment information is output. With such a configuration, changes in the optical characteristics of the eye to be inspected during the subjective measurement can be easily obtained from the adjustment information based on the first optical characteristics and the second optical characteristics of the inspected eye. Therefore, the examiner can easily and accurately measure the optical characteristics of the eye to be inspected when subjectively measuring the optical characteristics of the eye to be inspected by using the adjustment information.

For example, as the first optical characteristic and the second optical characteristic when acquiring the accommodation information, the change in the optical characteristic can be further changed by using the optical refractive power that is more likely to be affected by the change in the accommodation state of the eye to be inspected. Easy to catch. Further, when the optical power is used, it is easier to capture the change in the optical characteristics by using at least the spherical power. Of course, when the ocular refractive power is used when acquiring the accommodation information, at least one of the spherical power, the astigmatic power, and the astigmatic axis angle may be used.

For example, the timing for acquiring the first optical characteristic may be acquired before the optical characteristic of the eye to be inspected is subjectively measured by the subjective measuring means. In this case, for example, the control means objectively measures the optical characteristics of the eye to be inspected by the objective measurement means before the optical characteristics of the eye to be inspected are subjectively measured by the subjective measurement means, and the first optical The characteristics may be acquired. For example, in the present embodiment, the optical characteristics of the eye to be inspected are objectively measured by the objective measuring means before the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means. As a result, the objective measurement is performed before the subjective measurement by the subjective measurement means, so that the change in the optical characteristics caused by the use of the subjective measurement means is suppressed, and the objective measurement is performed. The optical characteristics can be obtained by measuring the equation. Therefore, it is possible to acquire the optical characteristics by objective measurement in which the change in the optical characteristics is suppressed, and it is possible to acquire better adjustment information.

For example, as the timing for acquiring the first optical characteristic, the optical characteristic of the eye to be inspected may be acquired after being subjectively measured by the subjective measuring means. In this case, for example, the control means objectively measures the optical characteristics of the eye to be inspected by the objective measurement means after the subjective measurement of the optical characteristics of the eye to be inspected is completed by the subjective measurement means. The optical characteristics may be acquired. For example, in the present embodiment, the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means, and then the optical characteristics of the eye to be inspected are objectively measured by the objective measuring means. As a result, the objective type measurement is performed after the subjective type measurement by the subjective type measuring means. Therefore, the objective type measurement is performed while suppressing the change in the optical characteristics caused by using the subjective type measuring means. The optical characteristics can be obtained by the measurement of. Therefore, it is possible to acquire the optical characteristics by objective measurement in which the change in the optical characteristics is suppressed, and it is possible to acquire better adjustment information.

When acquiring the first optical characteristic, cloud fog may be applied to the eye E to be inspected. For example, in the measurement of the objective optical power when acquiring the first optical characteristic, a preliminary measurement of the optical power is first performed, and a cloud fog is applied to the eye E to be inspected based on the result of the preliminary measurement. You may. For example, the preliminary measurement may be the measurement of the objective eye refractive power measured by the objective measuring means, or the measurement of the subjective eye refractive power measured by the subjective measuring means.

For example, in the case of applying cloud fog, the display 31 may be moved in the optical axis L2 direction to apply cloud fog to the eye E to be inspected. In this case, for example, the display 31 may be moved to a position where it is once in focus with respect to the eye E to be inspected. Further, for example, when cloud fog is applied, an optical member (for example, a lens or the like) may be inserted into and removed from the optical path. Further, for example, when cloud fog is applied, the optical member (for example, a lens or the like) arranged in the optical path may be switched. For example, after the cloud fog is applied, the main measurement of the optical refractive power for acquiring the first optical characteristic may be performed on the eye to be inspected to which the cloud fog is applied. In this way, by applying cloud fog, the accommodation function of the eye to be inspected can be suppressed, and the first optical characteristic in a state where the accommodation function is suppressed can be obtained.

Further, for example, the timing for acquiring the first optical characteristic may be acquired while the optical characteristic of the eye to be inspected is subjectively measured by the subjective measuring means. In this case, for example, the first optical characteristic is acquired while the optical characteristic of the eye to be inspected is subjectively measured by the subjective measuring means, and the second optical characteristic is acquired after the first optical characteristic is acquired. You may do it.

For example, the adjustment information may be any information as long as the first optical characteristic and the second optical characteristic can be compared. For example, the adjustment information may be information acquired by performing a difference process between the first optical characteristic and the second optical characteristic. For example, the adjustment information acquired by the difference processing may be at least one of the difference result of the parameters of the first optical characteristic and the second optical characteristic, the difference image of the captured image, and the like. For example, the above parameter may be at least one of a spherical surface degree value, an astigmatism degree value, an astigmatism axis angle value, and the like.

For example, the difference image may be an image obtained by performing difference processing on the luminance values for each pixel between the captured images. In this case, for example, when there is no change between the first optical characteristic and the second optical characteristic, the luminance value of each pixel in the difference image becomes 0 (since the same captured image is obtained, the difference becomes 0). .. Further, in this case, for example, when there is a change between the first optical characteristic and the second optical characteristic, an image appears on the difference image because the luminance value of each captured image does not become zero.

For example, in the case of performing the difference processing, any optical characteristic may be set as the reference optical characteristic (reference data) for performing the difference processing. For example, the difference result may be acquired by performing difference processing on each optical characteristic with respect to the reference data.

For example, when only the first optical characteristic and the second optical characteristic are acquired, at least one of the first optical characteristic and the second optical characteristic may be used as reference data. For example, when further optical characteristics are acquired in addition to the first optical characteristics and the second optical characteristics, any optical characteristics may be set as reference data from the acquired optical characteristics. For example, when the optical characteristics are set as the reference data, the reference data may be selected by the examiner from a plurality of optical characteristics. Further, for example, when the optical characteristics are set as the reference data, the reference data may be automatically set by the acquisition means. In this case, for example, the acquisition means may set the one having the smallest optical characteristic (the farthest side (the side without eye adjustment)) as the reference data from the plurality of optical characteristics. Further, for example, the acquisition means may set the optical characteristics acquired immediately before the reference data for which the optical characteristics are newly acquired from the plurality of optical characteristics as the reference data. Further, for example, when a plurality of subjective tests are performed, the acquisition means may set arbitrary optical characteristics as reference data from the optical characteristics acquired by objective measurement in the plurality of subjective tests. good.

It should be noted that the difference result may be displayed as a numerical value, a graph, or the like. For example, when objective measurement or a plurality of objective measurements are performed in real time, the difference results thereof may be continuously displayed. With such a configuration, it is possible to confirm the fluctuation state of the optical characteristics.

In addition, for example, the quality of the change in the optical characteristics may be determined based on at least one of the difference result and the difference image. In this case, for example, a determination means is provided, and the determination means determines whether or not at least one of the results such as the difference result and the shape change result of the captured image satisfies a preset standard, and outputs the determination result. You may try to do it. For example, as a determination result, whether or not it is overcorrected may be output.

For example, in the present embodiment, by acquiring the adjustment information by the comparative processing, the change in the optical characteristics of the eye to be inspected during the subjective measurement can be more easily acquired from the comparative processing. Therefore, the examiner can more easily and accurately measure the optical characteristics of the eye to be inspected when subjectively measuring the optical characteristics of the eye to be inspected by using the adjustment information.

For example, the adjustment information may be the first optical characteristic and the second optical characteristic. In this case, for example, as the adjustment information, the information in which the first optical characteristic and the second optical characteristic are arranged (for example, the first region in which the first optical characteristic is arranged, and the second region different from the first region are the first. (2) Information in which optical characteristics are arranged) may be used. Further, in this case, the adjustment information may be information that can be displayed by switching between the first optical characteristic and the second optical characteristic. Further, in this case, for example, the adjustment information may be information in which the first optical characteristic and the second optical characteristic are superimposed. The superimposed information may be information in which at least a part of the first optical characteristic and the second optical characteristic is superimposed. In addition, for example, the adjustment information may be configured to be implemented in combination with the above information.

For example, in this embodiment, the subjective optometry device may include output means. For example, the output means outputs adjustment information. For example, the output means may be configured to display adjustment information on a display. Further, for example, the output means may be configured to print adjustment information. For example, the output means may be configured to transmit adjustment information to another device (another control means). In this case, for example, another device may receive the adjustment information and perform various controls based on the received adjustment information.

In this embodiment, the control means, the acquisition means (acquisition control means), and the output means (output control means) may be used in combination. Further, for example, the control means, the acquisition means, and the output means may be separately provided. Of course, each of the above control means may be composed of a plurality of control means.

In the present embodiment, while the optical characteristics of the optometry to be inspected are subjectively measured by the subjective measuring means, the optical characteristics of the optometry to be inspected are objectively measured by the objective measuring means. The device is described as an example, but the description is not limited to this. The optometry device may be configured to be able to acquire adjustment information. In this case, for example, the control means objectively measures the optical characteristics of the eye to be inspected by the objective measuring means to acquire the first optical characteristics, and at a timing different from the timing at which the first optical characteristics are acquired. Then, the optical characteristics of the eye to be inspected may be objectively measured by the objective measuring means to acquire the second optical characteristics. For example, the acquisition means may acquire adjustment information based on the first optical characteristic and the second optical characteristic. For example, the output means may output adjustment information. For example, in the present embodiment, the optical characteristics of the eye to be inspected are objectively measured to acquire the first optical characteristics, and the objective measurement means is used at a timing different from the timing at which the first optical characteristics are acquired. The optical characteristics of the eye to be inspected are objectively measured to obtain the second optical characteristics. The adjustment information based on the acquired first optical characteristic and the second optical characteristic is acquired, and the adjustment information is output. With such a configuration, the examiner can acquire the changed state of the optical characteristics of the eye to be inspected when the subjective optometry device is used. This makes it possible to measure the optometry with high accuracy when measuring the optometry using the subjective optometry device.

<Correction processing based on adjustment information>
For example, in the present embodiment, the subjective optometry device may include a setting means (for example, a control unit 70). For example, in the present embodiment, the subjective optometry apparatus may include a first correction means (for example, a control unit 70, a correction optical system 60). For example, the setting means may set a correction amount for correcting the change in the accommodation state of the eye to be inspected, which occurs while the optical characteristics of the eye to be inspected are being subjectively measured by the subjective measurement means, based on the adjustment information. good. The correction amount is preferably set to a correction amount that can cancel the change in the adjustment state of the eye to be inspected, but is not limited to this as long as it does not interfere with the subjective examination. For example, the first correction means may perform correction to cancel the change in the adjustment state of the eye to be inspected caused by the subjective measurement means based on the correction amount set by the setting means. For example, in the present embodiment, a correction amount for correcting the change in the accommodation state of the eye to be inspected is set based on the adjustment information, and the change in the accommodation state of the eye to be inspected caused by the subjective measurement means is canceled based on the correction amount. Is making corrections. As a result, even if a change in the optical characteristics of the eye to be inspected occurs while the optical characteristics of the inspected eye are being subjectively measured by the subjective measuring means, the measurement is performed in a state where the change in the optical characteristics is cancelled. It can be performed. As a result, when the optical characteristics of the eye to be inspected are subjectively measured, the optical characteristics of the eye to be inspected can be easily and accurately measured.

For example, as for the correction amount, a table preset for each parameter of the adjustment information may be created, and the created table may be stored in a memory (for example, a memory 72). In this case, for example, the setting means may call the correction amount corresponding to the adjustment state from the memory and set it. Further, for example, as the correction amount, an arithmetic expression for deriving the correction amount for each parameter of the adjustment information is stored in the memory, and the correction amount may be obtained using the arithmetic expression.

For example, as the first correction means, the correction optical system may also have a configuration in which the first correction means is also used. For example, in the present embodiment, since the correction optical system also serves as the first correction means, complicated control and a separate correction means for canceling the adjustment state change are not required, so that the optical system has a simple configuration. Aberrations can be corrected. For example, as the first correction means, a dedicated correction means may be separately provided. In this case, for example, as the first correction means, for example, at least one of a spherical lens, a cylindrical lens, a cross cylinder lens, a rotary prism, a wavefront modulation element, and the like may be used as the first correction means. Of course, for example, as the first correction means, a member different from the above-mentioned member may be used.

In this embodiment, the control means, the setting means (setting control means), and the control means of the first correction means may be combined. Further, for example, the control means, the setting means, and the control means of the first correction means may be separately provided. Of course, each of the above control means may be composed of a plurality of control means.

<Correction of objective measurement results based on correction information of the correction optical system>
In the present embodiment, for example, the subjective optometry device may be configured such that the correction optical system is arranged in the optical path of the measurement optical system. Of course, the subjective optometry device may have a configuration in which the correction optical system is not arranged in the optical path of the measurement optical system.

For example, when the correction optical system is arranged in the optical path of the measurement optical system, the subjective optometry apparatus may include a second correction means (for example, a control unit 70). For example, the second correction means may correct the measurement result obtained by objectively measuring the eye to be inspected by the objective measurement means based on the correction information by the correction optical system. For example, the second correction means objectively measures the eye to be inspected by the objective measuring means so as to cancel the correction state by the correction optical system based on the correction information by the correction optical system. The result may be corrected. For example, in the present embodiment, when the correction optical system is present in the optical path of the objective measurement means, it is possible to correct the deviation of the optical characteristics caused by the measured luminous flux for measuring the objective passing through the correction optical system. can. As a result, the optical characteristics can be accurately obtained even when the objective measurement is performed when the correction is performed by the correction optical system. For example, in particular, when acquiring adjustment information based on at least two optical characteristics acquired by objective measurement, it may be difficult to compare due to the deviation between the optical characteristics. This technique is more effective.

For example, the second correction means may correct the optical characteristics as a measurement result. When the first optical characteristic and the second optical characteristic are acquired as the optical characteristics, at least one of the first optical characteristic and the second optical characteristic may be corrected. Further, for example, the second correction means may correct the adjustment information as a measurement result.

In this embodiment, the control means and the second correction means (second correction control means) may be used in combination. Further, for example, the control means and the second correction means may be separately provided. Of course, each of the above control means may be composed of a plurality of control means.

In the present embodiment, the configuration in which the optical characteristics of the eye to be inspected are objectively measured by the objective measuring means while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means is the subject. It may be used for a subjective test (anterior spectacle test) in which the optical characteristics of the optometry while wearing the spectacles are subjectively measured. In this case, for example, in a state where the eye to be inspected is wearing glasses, the first optical characteristic is acquired objectively by objective measurement by an objective measuring means, and the optical characteristic of the eye to be inspected is subjectively measured. In the meantime, the second optical characteristic measured objectively by the objective measuring means may be acquired. Further, for example, the adjustment information based on the acquired first optical characteristic and the second optical characteristic may be acquired and the adjustment information may be output.

For example, when at least one of a difference result and a difference image is obtained as adjustment information,
For example, the quality of the change in the optical characteristics may be determined based on at least one of the difference result and the difference image. In this case, for example, whether or not it is overcorrected may be output as a determination result. For example, by outputting whether or not it is overcorrected, it is possible to confirm whether or not the glasses currently worn are not overcorrected.

For example, as an example, when the eye to be inspected is wearing spectacles, the optotype for infinity is presented to acquire optical characteristics, and the power is higher than that of the optotype for infinity. The optotype may be presented to acquire the optical characteristics. In this case, the adjustment state may be acquired based on each calculated optical characteristic. This makes it possible to confirm whether or not the glasses currently worn are overcorrected.

<Initial value setting for subjective test>
In the present embodiment, for example, the subjective optometry device may include initial value setting means (for example, a control unit 70). In this case, for example, the control means objectively measures the optical characteristics of the eye to be inspected by the objective measurement means after starting the subjective measurement of the optical characteristics of the eye to be inspected by the subjective measurement means. The optical characteristics of the above may be acquired. For example, the initial value setting means sets the optical characteristics of the eye to be inspected objectively measured by the control means as the initial values of the correction optical system when the optical characteristics of the eye to be inspected are subjectively measured by the subjective measurement means. You may try to do it. For example, as the optical characteristic set as the initial value, at least one of spherical power, cylindrical power, cylindrical axis, polarization characteristic, aberration amount, and the like can be mentioned. Of course, an optical characteristic other than the above may be set as an initial value. For example, in the present embodiment, after the subjective measurement of the optical characteristics of the eye to be inspected is started by the subjective measurement means, the optical characteristics of the eye to be inspected are objectively measured by the objective measurement means to obtain the optics of the eye to be inspected. Get the characteristics. The objectively measured optical characteristics of the eye to be inspected are set as initial values of the correction optical system when the optical characteristics of the eye to be inspected are subjectively measured by the subjective measurement means. With such a configuration, it is not necessary to wait for the subjective measurement by the subjective inspection device until the objective measurement is completed, and the optical characteristics of the eye to be inspected can be measured quickly.

For example, the start of the subjective measurement may be a state in which the control of the subjective measurement is started. More specifically, for example, the start of subjective measurement means the state of starting the projection of the target luminous flux, the state of starting the inspection program, the state of starting the operation of the operation unit of the subjective inspection device, and the correction optical system. It may be at least one of the states in which the driving of the above is started.

For example, the initial value setting means sets the optical characteristics of the eye to be objectively measured objectively as the initial value in the subjective test performed when the objective measurement is started as the subjective test to be set as the initial value. It may be configured as set as. In this case, for example, the initial value setting means subjectively measures the optical characteristics of the eye to be inspected objectively measured by the objective measuring means before starting the objective measurement by the objective measuring means. It is set as the initial value of the correction optical system in the subjective measurement of the optical characteristics of the eye to be inspected carried out by the means. For example, in the present embodiment, the optical characteristics of the eye to be inspected objectively measured by the objective measuring means are carried out by the subjective measuring means before the objective measurement by the objective measuring means is started. It is set as the initial value of the correction optical system in the subjective measurement of the optical characteristics of the eye to be inspected. With such a configuration, it is possible to quickly perform subjective measurement by a subjective inspection device.

Further, for example, the initial value setting means is a subjective test set as an initial value, which is different from the subjective test (first subjective test) performed when the objective measurement is started (second subjective test). In the inspection), the optical characteristics of the eye to be inspected objectively measured may be set as an initial value. In this case, for example, the control means performs the first subjective measurement for subjectively measuring the optical characteristics of the eye to be inspected by the subjective measuring means, and then again subjectively measures the optical characteristics of the eye to be inspected by the subjective measuring means. The second subjective measurement to be measured may be performed. For example, the control means may objectively measure the optical characteristics of the eye to be inspected by the objective measurement means after starting the first subjective measurement. For example, the initial value setting means may set the optical characteristics of the eye to be inspected objectively measured objectively by the objective measurement means as the initial value of the second subjective measurement. For example, in the present embodiment, after performing the first subjective measurement for subjectively measuring the optical characteristics of the eye to be inspected by the subjective measuring means, the optical characteristics of the eye to be inspected are subjectively measured again by the subjective measuring means. Perform a second subjective measurement. After starting the first subjective measurement, the optical characteristics of the eye to be inspected are objectively measured by the objective measurement means, and the optical characteristics of the objectively measured eye are measured in the initial stage of the second subjective measurement. Set as a value. With such a configuration, even when the subjective measurement is performed again, the initial value has already been acquired at different subjective measurements, so that the measurement can be performed quickly.

For example, the first subjective test may be a subjective test that measures the same optical characteristics as those measured by the second subjective test. Further, for example, the first subjective test may be a subjective test for measuring optical characteristics different from the optical characteristics measured by the second subjective test. In this case, for example, the first subjective test may be a subjective test (naked eye test) that subjectively measures the optical characteristics of the eye to be inspected with the naked eye. Further, for example, the first subjective test may be a subjective test (front eyeglass test) in which the optical characteristics when the eye to be inspected is wearing spectacles are subjectively measured. In these cases, for example, the first subjective measurement is a subjective measurement that subjectively measures the optical characteristics of the eye to be inspected in an uncorrected state in which the optical characteristics of the optotype light beam are not changed by the correction optical system. The second subjective measurement may be a subjective measurement in which the optical characteristics of the target light beam are changed by the correction optical system to subjectively measure the optical characteristics of the eye to be inspected.

In the present embodiment, in the subjective optometry device, the optometric eye is fixed when the optical characteristic of the optometry object is objectively measured by the objective measurement means for the target luminous flux by the projection optical system. It may be configured to be used as a fixative for the purpose. For example, in the present embodiment, when the optical characteristics of the eye to be inspected are objectively measured by the objective measurement means for the target luminous flux by the projection optical system in the subjective detection means, the eye to be inspected is fixed. Use as an optotype. With such a configuration, the number of members can be reduced, and the device can be configured with a simple configuration. In addition, the extra space can be reduced and the device can be miniaturized.

In this embodiment, the control means and the initial value setting means (initial value setting control means) may be used in combination. Further, for example, the control means and the initial value setting means may be separately provided. Of course, each of the above control means may be composed of a plurality of control means.

<Example>
Hereinafter, the subjective optometry device of this embodiment will be described. For example, FIG. 1 is an external view of the subjective optometry device 1 according to the present embodiment. For example, the subjective optometry device 1 in the present embodiment includes a housing 2, a presentation window 3, an operation unit (monitor) 4, a chin rest 5, a base 6, an imaging optical system 100, and the like. For example, the housing 2 houses a member inside. For example, a measuring means (dotted line portion in FIG. 1) 7 is provided inside the housing 2 (details will be described later). For example, the measuring means 7 includes a measuring means for the right eye (measuring means for the right eye) 7R and a measuring means for the left eye (measuring means for the left eye) 7L. In the present embodiment, the measuring means 7R for the right eye and the measuring means 7L for the left eye include the same member. That is, the subjective optometry device 1 has a pair of left and right subjective measuring means and a pair of left and right objective measuring means. Of course, the measuring means 7R for the right eye and the measuring means 7L for the left eye may have different configurations at least a part of the members.

For example, the presentation window 3 is used to present a target to the subject. For example, the luminous fluxes from the right-eye measuring means 7R and the left-eye measuring means 7L are projected onto the eye E to be inspected through the presentation window 3.

For example, the monitor (display) 4 is a touch panel. That is, in the present embodiment, the monitor 4 functions as an operation unit (controller). The monitor 4 outputs a signal corresponding to the input operation instruction to the control unit 70 described later. Of course, the monitor 4 and the operation unit may be provided separately. For example, the operation unit may be configured to use at least one of an operation means such as a mouse, a joystick, and a keyboard.

For example, the monitor 4 may be a display mounted on the main body of the subjective optometry device 1 or may be a display connected to the main body of the subjective optometry device 1. Of course, it does not have to be a touch panel type. For example, a display of a personal computer (hereinafter referred to as "PC") may be used. Further, for example, a plurality of displays may be used in combination. For example, the measurement result is displayed on the monitor 4.

For example, the chin rest 5 is used to keep the distance between the optometry E and the subjective optometry device 1 constant, or to suppress large blurring of the face. For example, the chin rest 5 and the housing 2 are fixed to the base 6. In the present embodiment, the chin rest 5 is used to keep the distance between the optometry E and the subjective optometry device 1 constant, but the present invention is not limited to this. The configuration may be such that the distance between the optometry E and the subjective optometry device 1 is kept constant. For example, as a configuration for keeping the distance between the eye to be inspected E and the subjective optometry device 1 constant, a configuration using a forehead pad, a face pad, or the like can be mentioned.

For example, the image pickup optical system 100 is composed of an image pickup device (not shown) and a lens. For example, an imaging optical system is used to image the face of an eye to be inspected.

<Measuring means>
FIG. 2 is a diagram illustrating the configuration of the measuring means 7. In this embodiment, the measuring means for the left eye 7L will be described as an example. In the present embodiment, the right-eye measuring means 7R has the same configuration as the left-eye measuring means 7L, and thus the description thereof will be omitted. For example, the measuring means 7L for the left eye includes a subjective measurement optical system 25, an objective measurement optical system 10, a first index projection optical system 45, a second index projection optical system 46, and an observation optical system 50.

<Aware optical system>
For example, the subjective measurement optical system 25 is used as a part of the configuration of the subjective measurement means for subjectively measuring the optical characteristics of the eye to be inspected (details will be described later). For example, the optical characteristics of the eye to be inspected include optical power, contrast sensitivity, binocular vision function (for example, oblique amount, stereoscopic vision function, etc.) and the like. In this embodiment, a subjective measuring means for measuring the refractive power of the eye to be inspected will be described as an example. For example, the subjective measurement optical system 25 is composed of a projection optical system (target projection system) 30, a correction optical system 60, and a correction optical system 90.

For example, the projection optical system 30 projects the target luminous flux toward the eye E to be inspected. For example, the projection optical system 30 includes a display 31, a projection lens 33, a projection lens 34, a reflection mirror 36, a dichroic mirror 35, a dichroic mirror 29, and an objective lens 14. For example, the target light beam projected from the display 31 passes through the optical member in the order of the projection lens 33, the projection lens 34, the reflection mirror 36, the dichroic mirror 35, the dichroic mirror 29, and the objective lens 14, and the eye to be inspected E. Projected on.

For example, the display 31 displays an inspection target such as a Randold ring optotype, a fixative for fixing the eye E to be inspected (used for objective measurement described later), and the like. For example, the target luminous flux from the display 31 is projected toward the eye E to be inspected. In this embodiment, the following description will be given by taking as an example a case where an LCD is used as the display 31.

For example, the correction optical system 60 includes an astigmatism correction optical system 63 and a drive mechanism 39.

For example, the astigmatism correction optical system 63 is arranged between the light projecting lens 34 and the light projecting lens 33. For example, the astigmatism correction optical system 63 is used to correct the cylindrical power, the cylindrical axis, and the like of the eye to be inspected. For example, the astigmatism correction optical system 63 is composed of two positive cylindrical lenses 61a and 61b having the same focal length. The cylindrical lenses 61a and 61b are independently rotated about the optical axis L2 by driving the rotation mechanisms 62a and 62b, respectively. In the present embodiment, the astigmatism correction optical system 63 has been described by exemplifying a configuration using two positive cylindrical lenses 61a and 61b, but the present invention is not limited thereto. The astigmatism correction optical system 63 may have a configuration capable of correcting the cylindrical power, the cylindrical axis, and the like. For example, the correction lens may be configured to be taken in and out of the optical path of the light projecting optical system 30.

For example, the display 31 is integrally moved in the direction of the optical axis L2 by a drive mechanism 39 including a motor and a slide mechanism. For example, at the time of subjective measurement, by moving the display 31, the presentation position (presentation distance) of the optotype with respect to the subject's eye is optically changed, so that the spherical refractive power of the subject's eye is corrected. That is, the movement of the display 31 constitutes a spherical power correction optical system. Further, for example, when the objective measurement is performed, the display 31 is moved to cast a cloud fog on the subject's eye E. The spherical power correction optical system is not limited to this. For example, the spherical power correction optical system may have a large number of optical elements and may be configured to perform correction by arranging the optical elements in the optical path. Further, for example, the lens arranged in the optical path may be moved in the optical axis direction.

In the present embodiment, the correction optical system for correcting the spherical power, the cylinder power, and the cylinder axis is described as an example, but the present invention is not limited to this. For example, a correction optical system may be provided in which the prism value is corrected. By providing the correction optical system of the prism value, even if the subject has an oblique eye, the target luminous flux can be corrected so as to be projected onto the subject's eye.

In this embodiment, a configuration in which a cylindrical astigmatism correction optical system 63 and a spherical power correction optical system (for example, a driving means 39) are separately provided will be described as an example. Is not limited to this. For example, the straightening optical system may be configured to include a straightening optical system in which the spherical power, the cylindrical degree, and the cylindrical axis are corrected. For example, the correction optical system may be an optical system that modulates the wavefront. Further, for example, the straightening optical system may be an optical system that straightens the spherical power, the cylindrical power, the cylindrical shaft, and the like. In this case, for example, the correction optical system may include a lens disk in which a large number of optical elements (spherical lens, cylindrical lens, distributed prism, etc.) are arranged on the same circumference. The rotation of the lens disk is controlled by a drive unit (actuator or the like), so that the optical element desired by the examiner is arranged on the optical axis L2.

Further, by controlling the rotation of the optical element (for example, a cylindrical lens, a cross cylinder lens, a rotary prism, etc.) arranged on the optical axis L2 by the drive unit, the optical element can be rotated at the rotation angle desired by the examiner. It is arranged in L2. Switching of the optical element arranged on the optical axis L2 may be performed by operating an input means (operating means) such as a monitor 4.

The lens disc comprises one lens disc or a plurality of lens discs. When a plurality of lens discs are arranged, a drive unit corresponding to each lens disc is provided. For example, as a lens disc group, each lens disc includes an aperture (or a 0D lens) and a plurality of optical elements. Typical types of each lens disc are a spherical lens disc having a plurality of spherical lenses having different powers, a cylindrical lens disc having a plurality of cylindrical lenses having different powers, and an auxiliary lens disc having a plurality of types of auxiliary lenses. At least one of a red filter / green filter, a prism, a cross cylinder lens, a polarizing plate, a Maddox lens, and an auto cross cylinder lens is arranged on the auxiliary lens disk. Further, the cylindrical lens may be rotatably arranged around the optical axis L2 by the drive unit, and the rotary prism and the cross cylinder lens may be rotatably arranged around each optical axis by the drive unit.

For example, the correction optical system 90 is arranged between the objective lens 14 and the deflection mirror 81 described later. For example, the correction optical system 90 is used to correct optical aberrations generated by the subjective measuring means. For example, the correction optical system 90 is used to correct astigmatism in optical aberration. For example, the correction optical system 90 is composed of two positive cylindrical lenses 91a and 91b having the same focal length. For example, the correction optical system 90 corrects astigmatism by adjusting the cylindrical power and the cylindrical axis. The cylindrical lenses 91a and 91b are independently rotated about the optical axis L3 by driving the rotation mechanisms 92a and 92b, respectively. In the present embodiment, the correction optical system 90 has been described by taking as an example a configuration using two positive cylindrical lenses 91a and 91b, but the present invention is not limited to this. The correction optical system 90 may be configured as long as it can correct astigmatism. For example, the correction lens may be moved in and out of the optical axis L3. In the present embodiment, a configuration in which the correction optical system 90 is separately described is given as an example, but the present invention is not limited to this. The correction optical system 60 may also be configured to also serve as the correction optical system 90. In this case, the cylindrical power and the cylindrical axis of the eye to be inspected are corrected according to the amount of astigmatism. That is, the correction optical system 60 is driven so as to correct the (corrected) cylindrical power and the cylindrical axis in consideration of the amount of astigmatism. In this way, since the correction optical system 60 also serves as the correction optical system 90, for example, complicated control and a separate correction optical system for optical aberrations are not required, so that the optical aberrations are corrected with a simple configuration. can do.

<Objective optical system>
For example, the objective measurement optical system 10 is used as a part of the configuration of the objective measurement means for objectively measuring the optical characteristics of the eye to be inspected (details will be described later). For example, the optical characteristics of the eye to be inspected include an optical power, an axial length, a corneal shape, and the like. In this embodiment, an objective measuring means for measuring the refractive power of the eye to be inspected will be described as an example.

For example, the objective measurement optical system 10 is composed of a projection optical system 10a, a light receiving optical system 10b, and a correction optical system 90. For example, the projection optical system (projection optical system) 10a projects a spot-shaped measurement index onto the fundus of the eye to be inspected E through the center of the pupil of the eye to be inspected E. For example, the light receiving optical system 10b takes out the fundus reflected light reflected from the fundus through the peripheral portion of the pupil in a ring shape, and causes the two-dimensional image pickup element to image the ring-shaped fundus reflection image.

For example, the projection optical system 10a includes a measurement light source 11, a relay lens 12, a hole mirror 13, a prism 15, a drive unit (motor) 23, and a dichroic mirror 35 arranged on the optical axis L1 of the objective measurement optical system 10. , The dichroic mirror 29, and the objective lens 14. For example, the prism 15 is a luminous flux deflection member. For example, the drive unit 23 is a rotation means for rotationally driving the prism 15 around the optical axis L1. For example, the light source 11 has a conjugate relationship with the fundus of the eye to be inspected, and the hole portion of the hole mirror 13 has a conjugate relationship with the pupil. For example, the prism 15 is arranged at a position outside the position conjugate with the pupil of the eye E to be inspected, and eccentricizes the passing light flux with respect to the optical axis L1. Instead of the prism 15, a parallel flat plate may be diagonally arranged on the optical axis L1 as a luminous flux deflection member.

For example, the dichroic mirror 35 is shared by the optical path of the subjective measurement optical system 25 and the optical path of the objective measurement optical system 10. That is, for example, in the dichroic mirror 35, the optical axis L2 of the subjective measurement optical system 25 and the optical axis L1 of the objective measurement optical system 10 are coaxial. For example, the beam splitter 29, which is an optical path branching member, reflects the light flux measured by the subjective measurement optical system 25 and the light measured by the projection optical system 10a, and guides the light beam to the eye to be inspected.

For example, the light receiving optical system 10b shares the objective lens 14, the dichroic mirror 29, the dichroic mirror 35, the prism 15, and the hole mirror 13 of the projection optical system 10a, and the relay lens 16 is arranged in the optical path in the reflection direction of the hole mirror 13. , A two-dimensional image pickup element 22 (hereinafter referred to as an image pickup element 22) such as a mirror 17, a light receiving aperture 18, a collimeter lens 19, a ring lens 20, and a CCD arranged in an optical path in the reflection direction of the mirror 17. For example, the light receiving diaphragm 18 and the image sensor 22 have a conjugate relationship with the fundus of the eye to be inspected. For example, the ring lens 20 is composed of a ring-shaped lens portion and a light-shielding portion in which a region other than the lens portion is coated with a light-shielding coating, and has a positional relationship optically conjugated with the pupil of the eye to be inspected. It has become. For example, the output from the image pickup device 22 is input to the arithmetic control unit 70 (hereinafter, control unit 70).

For example, the dichroic mirror 29 reflects the reflected light of the measured light from the projected optical system 10a by the fundus of the eye to be inspected toward the light receiving optical system 10. Further, for example, the dichroic mirror 29 transmits the front eye portion observation light and the alignment light and guides them to the observation optical system 50. Further, for example, the dichroic mirror 35 reflects the reflected light of the measurement light from the projection optical system 10a by the fundus of the eye to be inspected toward the light receiving optical system 10.

The objective measurement optical system 10 is not limited to the above, and a ring-shaped measurement index is projected from the peripheral portion of the pupil onto the fundus, and the reflected light from the fundus is extracted from the central portion of the pupil, and the ring-shaped measurement index is formed on the two-dimensional image pickup element. Well-known ones such as a configuration for receiving a light-receiving image of the fundus reflection can be used.

The objective measurement optical system 10 is not limited to the above-mentioned one, and the projection optical system that projects the measurement light toward the subject's eye fundus and the reflected light acquired by the reflection of the measurement light on the fundus. It may be any measurement optical system having a light receiving optical system that receives light from the light receiving element. For example, the optical power measuring optical system may be configured to include a Shack-Hartmann sensor. Of course, other measurement type devices may be used (for example, a phase difference type device that projects a slit).

For example, the light source 11 of the projection optical system 10a, the light receiving diaphragm 18, the collimator lens 19, the ring lens 20, and the image pickup element 22 of the light receiving optical system 10b can be integrally moved in the optical axis direction. In the present embodiment, for example, the light source 11 of the projection optical system 10a, the light receiving diaphragm 18 of the light receiving optical system 10b, the collimator lens 19, the ring lens 20, and the image pickup element 22 have an optical axis L1 by a drive mechanism 39 for driving the display 31. It is moved integrally in the direction of. That is, the display 31, the light source 11 of the projection optical system 10a, the light receiving diaphragm 18 of the light receiving optical system 10b, the collimator lens 19, the ring lens 20, and the image pickup element 22 move integrally as the drive unit 95. Of course, each may be separately driven.
For example, the drive unit 95 moves a part of the objective measurement optical system 10 in the optical axis direction so that the outer ring light flux is incident on the image pickup device 22 in each meridian direction. That is, by moving a part of the objective measurement optical system 10 in the direction of the optical axis L1 according to the spherical refraction error (spherical refractive power) of the eye to be inspected, the spherical refraction error is corrected and the spherical refraction error is corrected with respect to the fundus of the eye to be inspected. The light source 11, the light receiving aperture 18, and the image pickup element 22 are optically coupled. The moving position of the drive mechanism 39 is detected by a potentiometer (not shown). The hole mirror 13 and the ring lens 20 are arranged so as to be conjugated with the pupil of the eye to be inspected at a constant magnification regardless of the amount of movement of the movable unit 25.

In the above configuration, the measurement light emitted from the light source 11 passes through the relay lens 12, the hall mirror 13, the prism 15, the dichroic mirror 35, the beam splitter 29, and the objective lens 14, and is a spot-shaped point on the fundus of the eye to be inspected. Form a light source image. At this time, the pupil projection image (projected luminous flux on the pupil) of the hole portion of the hall mirror 13 is eccentrically rotated at high speed by the prism 15 rotating around the optical axis. The point light source image projected on the fundus is reflected and scattered to eject the eye to be inspected, condensed by the objective lens 14, the beam splitter 29, the dichroic mirror 35, the prism 15 rotating at high speed, the hole mirror 13, the relay lens 16, The light is focused again at the position of the light receiving aperture 18 via the mirror 17, and a ring-shaped image is formed on the image pickup element 22 by the collimator lens 19 and the ring lens 20.

For example, the prism 15 is arranged in a common optical path with the projection optical system 10a and the light receiving optical system 10b. For this reason, the reflected luminous flux from the fundus of the eye passes through the same prism 15 as the projected optical system 10a, so that the optical system after that passes as if there was no eccentricity of the projected luminous flux / reflected luminous flux (light receiving flux) on the pupil. It is scanned.

For example, the correction optical system 90 is also used as the subjective measurement optical system 25. Of course, a correction optical system used in the objective measurement optical system 10 may be separately provided.

<1st index projection optical system and 2nd index projection optical system>
In the present embodiment, the first index projection optical system 45 and the second index projection optical system 46 are arranged between the correction optical system 90 and the deflection mirror 81. Of course, the arrangement positions of the first index projection optical system 45 and the second index projection optical system 46 are not limited to this.

In the first index projection optical system 45, a plurality of infrared light sources are arranged concentrically around the optical axis L3 at intervals of 45 degrees, and are arranged symmetrically with a vertical plane passing through the optical axis L3. .. The first index projection optical system 45 emits near-infrared light for projecting an alignment index onto the cornea of the eye to be inspected. The second index projection optical system 46 is arranged at a position different from that of the first index projection optical system 45 and includes six infrared light sources. In this case, the first index projection optical system 45 projects an index of infinity onto the cornea of the subject's eye E from the left-right direction, and the second index projection optical system 46 projects the index of infinity onto the cornea of the subject's eye E at a finite distance. The index is projected vertically or diagonally. For convenience, only a part of the first index projection optical system 45 and the second index projection optical system 46 is shown in this figure of FIG. 2. The second index projection optical system 46 is also used as anterior eye portion illumination for illuminating the anterior segment of the eye to be inspected. It can also be used as an index for measuring the shape of the cornea. Further, the first index projection optical system 45 and the second index projection optical system 46 are not limited to the point light source. For example, it may be a ring-shaped light source or a line-shaped light source.

<Observation optical system>
The observation optical system (imaging optical system) 50 includes an objective lens 14 and a dichroic mirror 29 in the subjective measurement optical system 25 and the objective measurement optical system 10, and includes an image pickup lens 51 and a two-dimensional image pickup element 52. .. For example, the image pickup device 52 has an image pickup surface arranged at a position substantially conjugate with the anterior eye portion of the eye to be inspected. For example, the output from the image sensor 52 is input to the control unit 70. As a result, the image of the anterior segment of the eye to be inspected is imaged by the two-dimensional image sensor 52 and displayed on the monitor 4. The observation optical system 50 also serves as an optical system for detecting an alignment index image formed on the cornea of the eye to be inspected by the first index projection optical system 45 and the second index projection optical system 46, and is aligned by the control unit 70. The position of the index image is detected.

<Internal configuration of subjective optometry device>
Hereinafter, the internal configuration of the subjective optometry device 1 will be described. FIG. 3 is a schematic configuration diagram of the inside of the subjective optometry device 1 according to the present embodiment as viewed from the front direction (direction A in FIG. 1). FIG. 4 is a schematic configuration diagram of the inside of the subjective optometry device 1 according to the present embodiment as viewed from the side direction (direction B in FIG. 1). FIG. 5 is a schematic configuration diagram of the inside of the subjective optometry device 1 according to the present embodiment as viewed from the upper surface direction (direction C in FIG. 1). In FIG. 3, for convenience of explanation, the optical axis showing the reflection of the half mirror 84 is omitted. Note that FIG. 4 shows only the optical axis of the measuring means 7L for the left eye for convenience of explanation. Note that FIG. 5 shows only the optical axis of the measuring means 7L for the left eye for convenience of explanation.

For example, the subjective optometry device 1 includes a subjective measuring means and an objective measuring means. For example, the subjective measuring means includes a measuring means 7, a deflecting mirror 81, a driving means 83, a driving means 82, a half mirror 84, and a concave mirror 85. Of course, the subjective measuring means is not limited to this configuration. As an example, the configuration may not have the half mirror 84. In this case, the optical axis of the concave mirror 85 may be irradiated with a light beam from an oblique direction, and the reflected light beam may be guided to the eye E to be inspected. For example, the objective measuring means includes a measuring means 7, a deflecting mirror 81, a half mirror 84, and a concave mirror 85. Of course, the objective measuring means is not limited to this configuration. As an example, the configuration may not have the half mirror 84. In this case, the optical axis of the concave mirror 85 may be irradiated with a light beam from an oblique direction, and the reflected light beam may be guided to the eye E to be inspected.

The subjective optometry device 1 has a right eye driving means 9R and a left eye driving means 9L, and can move the right eye measuring means 7R and the left eye measuring means 7L in the X direction, respectively. For example, by moving the measuring means 7R for the right eye and the measuring means 7L for the left eye, the distance between the deflection mirror 81 and the measuring means 7 is changed, and the presentation position of the luminous flux in the Z direction is changed. To. As a result, the target light flux corrected by the correction optical system 60 is guided to the eye to be inspected, and the image of the target light beam corrected by the correction optical system 60 is adjusted in the Z direction so as to be formed on the fundus of the eye to be inspected. can do.

For example, the deflection mirror 81 has a deflection mirror 81R for the right eye and a deflection mirror 81L for the left eye, which are provided in pairs on the left and right, respectively. For example, the deflection mirror 81 is arranged between the correction optical system 60 and the eye to be inspected. That is, the corrective optical system 60 has a pair of left and right corrective optical systems for the right eye and a corrective optical system for the left eye, and the deflection mirror 81R for the right eye has the corrective optical system for the right eye and the right eye. Arranged between the eye ERs, the deflection mirror 81L for the left eye is arranged between the left eye corrective optics and the left eye ER. For example, the deflection mirror 81 is preferably arranged at the pupil conjugate position.

For example, the deflection mirror 81R for the right eye reflects the light flux projected from the measuring means 7R for the right eye and guides the light beam to the right eye ER. Further, for example, the reflected light reflected by the right eye ER is reflected and guided to the right eye measuring means 7R. For example, the deflection mirror 81L for the left eye reflects the light flux projected from the measuring means 7L for the left eye and guides the light beam to the left eye EL. Further, for example, the reflected light reflected by the left eye EL is reflected and guided to the left eye measuring means 7L. In the present embodiment, a configuration in which a deflection mirror 81 is used as a deflection member that reflects the light flux projected from the measuring means 7 and guides the light beam to the eye E to be inspected is described as an example, but the present embodiment is limited to this. Not done. Any deflecting member that reflects the light flux projected from the measuring means 7 and guides the light beam to the eye E to be inspected may be used. For example, examples of the deflection member include a prism and a lens.

For example, the drive means 83 includes a motor (drive unit) and the like. For example, the driving means 83 has a driving means 83R for driving the deflection mirror 81R for the right eye and a driving means 83L for driving the deflection mirror 81L for the left eye. For example, the deflection mirror 81 can be moved in the X direction by driving the drive means 83. For example, by moving the deflection mirror 81R for the right eye and the deflection mirror 81L for the left eye, the distance between the deflection mirror 81R for the right eye and the deflection mirror 81L for the left eye is changed, and the eye to be inspected. The distance in the X direction between the optical path for the right eye and the optical path for the left eye can be changed according to the interpupillary distance of the eye.

For example, the drive means 82 includes a motor (drive unit) and the like. For example, the driving means 82 has a driving means 82R for driving the deflection mirror 81R for the right eye and a driving means 82L for driving the deflection mirror 81L for the left eye. For example, the deflection mirror 81 rotates and moves by driving the drive means 82. For example, the driving means 82 rotates the deflection mirror 81 with respect to the rotation axis in the horizontal direction (X direction) and the rotation axis in the vertical direction (Y direction). That is, the driving means 82 rotates the deflection mirror 81 in the XY directions. The rotation of the deflection mirror 81 may be in either the horizontal direction or the vertical direction. It should be noted that the optical path for the right eye and the optical path for the left eye may each be provided with a plurality of deflection mirrors. For example, there may be a configuration in which two deflection mirrors are provided for each of the right eye optical path and the left eye optical path (for example, two deflection mirrors in the right eye optical path). In this case, one deflection mirror may be rotated in the X direction and the other deflection mirror may be rotated in the Y direction. For example, it is possible to optically correct the image formation position by deflecting the apparent luminous flux for forming the image of the correction optical system 60 in front of the eye to be inspected by rotating the deflection mirror 81. can.

For example, the concave mirror 85 is shared by the measuring means 7R for the right eye and the measuring means 7L for the left eye. For example, the concave mirror 85 is shared by an optical path for the right eye including a corrective optical system for the right eye and an optical path for the left eye including an optical path for the left eye. That is, the concave mirror 85 is arranged at a position where both the optical path for the right eye including the corrective optical system for the right eye and the optical path for the left eye including the corrective optical system for the left eye pass through. Of course, the concave mirror 85 does not have to be a shared configuration. A concave mirror may be provided in each of the optical path for the right eye including the correction optical system for the right eye and the optical path for the left eye including the correction optical system for the left eye. For example, the concave mirror 85 guides the target luminous flux that has passed through the correction optical system to the eye to be inspected, and forms an image of the optotype light flux that has passed through the correction optical system in front of the eye to be inspected. In the present embodiment, the configuration using the concave mirror 85 is given as an example, but the present invention is not limited to this. Various optical members can be used. For example, as the optical member, a lens, a plane mirror, or the like can be used.

For example, the concave mirror 85 is used as both a subjective measuring means and an objective measuring means. For example, the target luminous flux projected from the subjective measurement optical system 25 is projected onto the eye to be inspected via the concave mirror 85. Further, for example, the measurement light projected from the objective measurement optical system 10 is projected onto the eye to be inspected via the concave mirror 85. Further, for example, the reflected light of the measurement light projected from the objective measurement optical system 10 is guided to the light receiving optical system 10b of the objective measurement optical system 10 via the concave mirror 85. In the present embodiment, the reflected light of the measurement light by the objective measurement optical system 10 is guided to the light receiving optical system 10b of the objective measurement optical system 10 via the concave mirror 85 as an example. However, it is not limited to this. The reflected light of the measurement light by the objective measurement optical system 10 may be configured not to pass through the concave mirror 85.

More specifically, for example, in the present embodiment, between the optical axis between the concave mirror 85 and the eye E to be inspected in the subjective measuring means and the concave mirror 85 to the eye E in the objective measuring means. Is configured to be at least coaxial with the optical axis of. In the present embodiment, the optical axis L2 of the subjective measurement optical system 25 and the optical axis L1 of the objective measurement optical system 10 are combined and coaxial with each other by the dichroic mirror 35.

Hereinafter, the optical path of the subjective measurement means will be described. For example, the subjective measurement means guides the optotype light beam that has passed through the correction optical system 60 to the eye to be inspected by reflecting the optotype light beam that has passed through the correction optical system 60 in the direction of the eye to be inspected, and the visual vision that has passed through the correction optical system 60. An image of the luminous flux is formed in front of the eye to be inspected so as to optically have a predetermined inspection distance. That is, the concave mirror 85 reflects the target luminous flux so as to make it a substantially parallel luminous flux. Therefore, the optotype image seen by the subject appears to be farther than the actual distance from the eye E to be examined to the display 31. That is, by using the concave mirror 85, the target image can be presented to the subject so that the image of the target luminous flux can be seen at a position at a predetermined inspection distance.

It will be explained in more detail. In the following description, the optical path for the left eye will be described as an example. The optical path for the right eye has the same configuration as the optical path for the left eye. For example, in the subjective measurement means for the left eye, the luminous flux projected from the display 13 of the measurement means 7L for the left eye is incident on the astigmatism correction optical system 63 via the projection lens 33. The luminous flux that has passed through the turbulence correction optical system 63 is incident on the correction optical system 90 via the reflection mirror 36, the dichroic mirror 35, the dichroic mirror 29, and the objective lens 14. The luminous flux that has passed through the correction optical system 90 is projected from the measuring means for the left eye 7L toward the deflection mirror 81L for the left eye. The target luminous flux emitted from the left eye measuring means 7L and reflected by the left eye deflecting mirror 81 is reflected toward the concave mirror 85 by the half mirror 84. The target luminous flux reflected by the concave mirror passes through the half mirror 84 and reaches the left eye EL.

As a result, an optotype image corrected by the correction optical system 60 with reference to the spectacle wearing position of the left eye EL (for example, about 12 mm from the apex of the cornea) is formed on the fundus of the left eye EL. Therefore, the astigmatism correction optical system 63 was arranged in front of the eyes, and the spherical power was adjusted in front of the eyes by the correction optical system of the spherical power (in this embodiment, the drive mechanism 39 was driven). The subject can collimate the image of the optotype in a natural state through the concave mirror 85. In the present embodiment, the optical path for the right eye has the same configuration as the optical path for the left eye, and the left and right sides are based on the spectacle wearing positions of both ERs and ELs (for example, about 12 mm from the apex of the cornea). The optotype image corrected by the pair of correction optical systems 60 is formed on the fundus of both eyes. In this way, the subject responds to the examiner while directly looking at the optotype in the state of natural vision, corrects by the correction optical system 60 until the inspection optotype looks appropriate, and is based on the correction value. The optical characteristics of the eye to be inspected are measured subjectively.

Next, the optical path of the objective measuring means will be described. In the following description, the optical path for the left eye will be described as an example. The optical path for the right eye has the same configuration as the optical path for the left eye. For example, in the objective measuring means for the left eye, the measurement light emitted from the light source 11 of the projection optical system 10a in the objective measurement optical system 10 passes through the relay lens 12 to the objective lens 14 and is a correction optical system. It is incident on 90. The measurement light that has passed through the correction optical system 90 is projected from the measurement means for the left eye 7L toward the deflection mirror 81L for the left eye. The measurement light emitted from the left-eye measuring means 7L and reflected by the left-eye deflection mirror 81 is reflected by the half mirror 84 toward the concave mirror 85. The measurement light reflected by the concave mirror passes through the half mirror 84, reaches the left eye EL, and forms a spot-shaped point light source image on the fundus of the left eye EL. At this time, the pupil projection image (projected luminous flux on the pupil) of the hole portion of the hall mirror 13 is eccentrically rotated at high speed by the prism 15 rotating around the optical axis.

The light of the point light source image formed on the fundus of the left eye EL is reflected and scattered to emit the eye E to be inspected, and is collected by the objective lens 14 through the optical path through which the measurement light has passed, and is collected by the objective lens 14 to the dichroic mirror 29. , The dichroic mirror 35, the prism 15, the hole mirror 13, the relay lens 16, and the mirror 17. The reflected light passing through the mirror 17 is collected again on the aperture of the light receiving diaphragm 18, is converted into a substantially parallel light flux (in the case of an emmetropic eye) by the collimator lens 19, and is taken out as a ring-shaped light flux by the ring lens 20. It is received by the image pickup element 22 as a ring image. By analyzing the received ring image, the optical characteristics of the eye to be inspected can be objectively measured.

<Control unit>
For example, the control unit 70 includes a CPU (processor), RAM, ROM, and the like. For example, the CPU of the control unit 70 controls each member of the subjective optometry device 1. For example, RAM temporarily stores various types of information. The ROM of the control unit 70 stores various programs for controlling the operation of the subjective optometry device 1, optotype data for various inspections, initial values, and the like. The control unit 70 may be composed of a plurality of control units (that is, a plurality of processors).

For example, the control unit 70 is electrically connected to a non-volatile memory (storage unit) 72, a monitor (also serving as an operation unit in this embodiment) 4, various members, and the like. The non-volatile memory (hereinafter referred to as memory) 72 is a non-transient storage medium capable of retaining the storage contents even when the power supply is cut off. For example, a hard disk drive, a flash ROM, an OCT device 1, a USB memory detachably attached to the subjective optometry device 1, and the like can be used as the non-volatile memory 72. For example, the memory 72 stores a control program for controlling the subjective measuring means and the objective measuring means.

<Control operation>
Hereinafter, the control operation of the subjective optometry device 1 will be described. FIG. 6 is a flowchart illustrating a flow of control operation in this embodiment. The examiner makes the jaw stand 5 rest on the subject's jaw and instructs the examiner to observe the presentation window 3. After instructing the subject to fix the fixative displayed on the display 31, the examiner performs alignment with respect to the eye to be inspected.

<Alignment operation (S1)>
When the alignment start switch is selected by the examiner, the control unit 70 starts the automatic alignment (S1). In this embodiment, a case of measuring the optical characteristics of the eye to be inspected during long-distance use will be described as an example. It is possible to measure the optical characteristics of the eye to be inspected in the same manner as in the case of near use and in the same way as in the case of long-distance use.

For example, the control unit 70 detects the pupil positions of the left and right eyes to be inspected from the face image captured by the imaging optical system 100. For example, when the pupil position is detected, the control unit 70 controls the subjective optometry device 1 so that the anterior eye portion image is displayed on the monitor 4. For example, the control unit 70 drives the deflection mirror 81R for the right eye and the deflection mirror 81L for the left eye, respectively, and rotates them in the XY directions. Further, for example, when the pupil position is detected, the control unit 70 can move the right eye measuring means 7R and the left eye measuring means 7L in the X direction, respectively. That is, the control unit 70 performs alignment in the XY direction by driving the deflection mirror 81, and aligns in the Z direction by driving the measuring means 7.

In this embodiment, a configuration in which the alignment in the XYZ direction is adjusted by driving the deflection mirror 81 and the measuring means 7 is described as an example, but the present invention is not limited to this. Any configuration may be used as long as the positional relationship between the eye to be inspected and the subjective measuring means and the objective measuring means can be adjusted. That is, the configuration may be such that the XYZ direction can be adjusted so that the image corrected by the correction optical system 60 is formed on the fundus of the eye to be inspected. For example, the chin rest 6 may be provided with a configuration in which the subjective optometry device 1 can be moved in the XYZ direction, and the subjective optometry device 1 may be moved. Further, for example, the deflection mirror 81 and the measurement unit may be configured to be integrally movable in the XYZ direction so that the deflection mirror 81 and the measurement unit can be adjusted in the XYZ direction. Further, for example, the configuration may be such that the XYZ direction can be adjusted only by the deflection mirror 81. In this case, for example, the deflection mirror 81 may be rotationally driven and the deflection mirror 81 may move in the Z direction so that the distance between the deflection mirror 81 and the measurement unit changes. For example, in the alignment control, both eyes may be displayed on the monitor 4 and the alignment control of both eyes may be performed on the same screen. Further, for example, in the alignment control, one eye to be inspected is displayed on the monitor 4, and after the alignment control of one inspected eye is completed, the other inspected eye is displayed on the monitor 4 and the other inspected eye is displayed. Alignment control may be performed. Further, for example, the alignment control of the other eye to be inspected may be performed based on the alignment control result of one eye to be inspected.

For example, the control unit 70 detects the positional deviation of the image of the correction optical system 60 with respect to the eye to be inspected. For example, the control unit 70 controls the driving means based on the detected detection result, and deflects the apparent luminous flux for guiding the image of the correction optical system 60 to the eye to be inspected, thereby determining the formation position of the image. Optically correct. As described above, the subjective optometry device 1 in the present embodiment includes a configuration that detects the positional deviation between the eye to be inspected and the correction optical system and optically corrects the image formation position. As a result, by correcting the positional deviation between the eye to be inspected and the corrective optical system, the device can be used at an appropriate position, and accurate measurement can be performed.

<Objective measurement (S2)>
The control unit 70 emits an objective measurement start trigger signal (hereinafter, referred to as a trigger signal) for starting the objective measurement (objective measurement) (S2) based on the output of the alignment completion signal. When the trigger signal for starting the objective measurement is emitted, the control unit 70 emits the measured luminous flux from the objective measurement optical system 10. In this case, each measured luminous flux is reflected by the concave mirror 85 via the deflection mirrors 81R and 81L, and then projected onto the fundus of the eye to be inspected. The measurement light reflected from the fundus is reflected by the deflection mirror 81R (81L) via the concave mirror 85, and then the measurement image is captured by the image pickup device 22.

For example, in the measurement of the objective optical power, a preliminary measurement of the optical power is first performed, and the display 31 is moved in the optical axis L2 direction based on the result of the preliminary measurement, so that the eye to be inspected E is measured. Clouds and fog may be applied. That is, the display 31 may be moved to a position where it is once in focus with respect to the eye E to be inspected. After that, the main measurement of the optical power may be performed on the eye to be inspected covered with cloud fog. In this measurement, the measured image is captured by the image pickup element 22, and the output signal from the image pickup element 22 is stored in the memory 72 as image data (measurement image). After that, the control unit 70 analyzes the ring image stored in the memory 72 and obtains the value of the refractive power in each meridian direction. By applying a predetermined process to this refractive power, the control unit 70 performs an objective refractive power of S (spherical power), C (astigmatism power), and A (astigmatism axis angle) of the subject's eye at the time of long-distance use. (Objective value) is obtained. The obtained objective value at the time of long-distance use is stored in the memory 72.

In the measurement of the objective eye refractive power, the control unit 70 may control the correction optical system 90 to correct the optical aberration generated in the optical path of the objective measurement optical system 10. In this case, a correction amount corresponding to the refractive index measured by the objective measurement optical system 10 is acquired from the memory 72, and the correction optical system 90 is controlled based on the acquired aberration correction amount.

More specifically, the correction amount is set according to the ocular refractive power obtained in the preliminary measurement, and the correction optical system 90 is driven based on the set correction amount. As a result, since the main measurement is performed in a state where the aberration generated in the optical path of the objective measurement optical system 10 is corrected, the objective eye refractive power can be measured accurately. When the ocular refractive power is continuously measured (for example, a plurality of main measurements are performed), the correction optical system 90 may be controlled based on each measurement result.

In the above description, the objective optical power of the distance is measured, but the present invention is not limited to this, and is the optical power of the eye when the optotype is presented at a short distance. The objective eye refractive power may be measured. The objective refractive power measurement may be performed simultaneously for the left and right eyes, or may be performed at different timings for the left and right eyes.

<Aware measurement (S3)>
Then, the subjective measurement (S3) is performed. When the objective refractive power measurement is completed and the monitor (also serving as an operation unit in this embodiment) 4 is operated, the mode is switched to the conscious distance vision measurement mode (conscious refractive power measurement) mode.

For example, the control unit 70 may control the display 31 and display a required visual acuity value optotype on the optical axis L2 (for example, an optotype having a visual acuity value of 0.8). When the initial presentation target is presented to the subject's eye, the examiner makes a distance vision measurement of the subject. When a predetermined switch on the monitor 4 is pressed, the visual acuity value optotype presented is switched.

For example, if the subject's answer is correct, the examiner switches to a visual acuity target with a one-step higher visual acuity value. On the other hand, if the subject's answer is incorrect, the visual acuity is switched to one step lower. That is, the control unit 70 may switch the optotype based on the signal of changing the visual acuity value from the monitor 4.

Further, the examiner may change the correction power of the correction optical system 60 by using the monitor 4 to obtain the distance awareness value (spherical power S, astigmatism power C, astigmatism axis angle A) of the eye to be inspected.

The correction dioptric power of the correction optical system 60 may be set to different dioptric powers for the left and right eyes, or may be set to the same dioptric power for the left and right eyes. The subjective eye refractive power measurement may be performed simultaneously for the left and right eyes, or may be performed at different timings for the left and right eyes. In the case of different timings, the optotype may not be displayed on the display 31 of the non-measurement eye, or a fog (for example, a constant refractive power is added to the objective value) by the correction optical system 60. ) May be performed.

After the consciousness value for distance use is obtained, the mode may be switched to the consciousness near vision measurement mode. When set to the near vision measurement mode, the control unit 70 may control the projection optical system 30, change the convergence angle by the deflection mirror 81, and present the optotype at the near vision position. The display distance of the optotype in the near-field inspection may be arbitrarily changed based on the operation signal from the operation unit 4. As a result, the display distance of the optotype is changed from the far-distance position to the near-distance position. In the near vision inspection, the degree of recruitment and the adjusting force may be consciously obtained by changing the presentation distance of the optotype at the near vision position.

In this case, for example, the control unit 70 may acquire an aberration correction amount according to the presentation distance of the optotype from the memory 72, and control the correction optical system 90 based on the acquired aberration correction amount. Further, when the target display distance is changed, the control unit 70 may change the aberration correction amount by the correction optical system 90 according to the changed target display distance. As a result, even if the target display distance is changed, the target with reduced aberration is presented. In this case, the control unit 70 may change the aberration correction amount according to the correction power to which the display distance of the optotype is added.

Further, the control unit 70 may control the light deflection member in response to the change in the display position of the optotype to change the convergence angle of the left and right optotype luminous flux. In this case, for example, the control unit 70 acquires an aberration correction amount corresponding to the deflection angle of the optical deflection member corresponding to the convergence angle from the memory 72, and controls the correction optical system 90 based on the acquired aberration correction amount. You may. Further, when the convergence angle of the visual target luminous flux is changed, the control unit 70 may change the aberration correction amount by the correction optical system 90 according to the changed convergence angle. This presents an aberration-reduced optotype, even if the convergence angle is changed.

In the near vision inspection, as in the distance inspection, for example, the examiner changes the correction power of the correction optical system 60 by using a predetermined switch of the operation unit 4, and the near vision target is presented. The subjective eye refractive power (near-use subjective value) may be measured. In the near-field inspection, the control unit 70 may change the aberration correction amount of the correction optical system 90 according to the change of the correction power.

<Acquisition of adjustment information (S5)>
Here, in the present embodiment, the subjective eye examination device 1 has a configuration in which objective measurement is performed while subjective measurement is being performed, and changes in the optical characteristics of the eye to be inspected are captured. For example, in this embodiment, adjustment information is acquired based on the optical characteristics of the eye to be inspected measured by the objective measuring means while performing the subjective measurement. For example, the adjustment information can be used to capture changes in the optical properties of the eye to be inspected while performing subjective measurements.

Hereinafter, acquisition of adjustment information (S5) will be described. For example, in this embodiment, the control unit 70 objectively senses the optical characteristics of the eye to be inspected by the objective measuring means while the control unit 70 is subjectively measuring the optical characteristics of the eye to be inspected by the subjective measuring means (S3). Measure.

More specifically, for example, in the present embodiment, the control unit 70 objectively measures the optical characteristics of the eye to be inspected by the objective measuring means and acquires the first optical characteristics. For example, the control unit 70 objectively measures the optical characteristics of the eye to be inspected by the objective measuring means while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means, and the second optical Get the characteristics. The optical characteristics measured by the objective measuring means may be stored in the memory 72.

For example, in the present embodiment, the first optical characteristic objectively measures the optical characteristic of the eye to be inspected by the objective measuring means before the optical characteristic of the eye to be inspected is subjectively measured by the subjective measuring means. Then, the first optical characteristic is acquired. For example, in this embodiment, the optical characteristics acquired by the objective measurement (S2) performed before the subjective measurement are used as the first optical characteristics (for example, spherical power, astigmatic power, astigmatic axis angle). .. Of course, the first optical characteristic may be configured to be separately acquired by the objective measuring means before the optical characteristic of the eye to be inspected is subjectively measured by the subjective measuring means.

For example, the control unit 70 may measure the second optical characteristic when a preset time has elapsed after starting the subjective measurement (for example, one minute after the start of the subjective measurement). You may. It should be noted that the configuration is not limited to the configuration in which the second optical characteristic is acquired when the time set as the timing for acquiring the second optical characteristic has elapsed. The second optical characteristic can be acquired by using various configurations as a trigger. For example, the timing at which the second optical characteristic is acquired includes the start of subjective measurement (for example, the state in which the projection of the target luminous flux is started, the state in which the inspection program is started, and the operation of the operation unit of the subjective inspection device. (In the state where the correction optical system is started, etc.), when switching the inspection target, between the subjective test and the subjective test (when performing multiple subjective tests), etc. good. Of course, the trigger signal for starting objective measurement may be output at a timing other than the above description.

It should be noted that a plurality of optical characteristics may be acquired while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means. In this case, for example, the control unit 70 acquires the second optical characteristic when a preset time elapses after starting the subjective measurement, and then every time the preset time elapses, the optical The characteristics (for example, the third optical characteristic, the fourth optical characteristic, etc.) may be acquired.

For example, the control unit 70 acquires adjustment information based on the first optical characteristic and the second optical characteristic. For example, in this embodiment, the control unit 70 acquires adjustment information by performing difference processing between the first optical characteristic and the second optical characteristic. In the following description, a case where the spherical power of the optical refractive power is used as the first optical characteristic and the second optical characteristic will be described as an example. In this embodiment, the spherical power in the ocular refractive power has been described as the first optical characteristic and the second optical characteristic, but the present invention is not limited to this. For example, the first optical characteristic and the second optical characteristic are not limited to the optical power of refraction. Further, for example, as the optical power, at least one of spherical power, astigmatic power, and astigmatic axis angle may be used.

More specifically, in the present embodiment, for example, the control unit 70 uses the first eye refractive power acquired before subjectively measuring the optical characteristics of the eye to be inspected by the subjective measuring means and the subjective measuring means. Adjustment information is acquired from the difference between the second eye refractive power acquired while subjectively measuring the optical characteristics of the eye to be inspected. For example, when the spherical power of the first eye refractive power is 1.0 diopter (D) and the spherical power of the second eye refractive power is 3.0D, the control unit 70 performs difference processing and adjusts information. To obtain the spherical power of 2.0D.

At this time, for example, the control unit 70 may correct the measurement result obtained by objectively measuring the eye to be inspected by the objective measurement means based on the correction information by the correction optical system. For example, when the subjective optometry device has a configuration in which the light beam measured by the objective measuring means passes through the correcting optical system of the subjective measuring means, the corrected state of the corrected optical system 60 when the first optical characteristic is acquired ( The arrangement state of the optical member) and the correction state of the correction optical system 60 when the second optical characteristic is acquired may be different. Therefore, when comparing the first optical characteristic and the second optical characteristic without considering the correction state of the correction optical system, it is possible to obtain an accurate result as adjustment information. It will be difficult.

In the following description, a case where the first optical characteristic and the second optical characteristic are corrected based on the correction information by the correction optical system will be described as an example. In the present embodiment, a configuration in which the first optical characteristic and the second optical characteristic are corrected based on the correction information will be described as an example, but the present invention is not limited thereto. For example, the adjustment information may be corrected based on the correction information.

For example, in this embodiment, the control unit 70 corrects the first optical characteristic and the second optical characteristic based on the correction information by the correction optical system. For example, the control unit 70 acquires correction information for use in correction. For example, the control unit 70 calls the correction information (for example, spherical power, cylinder power, cylinder axis) by the correction optical system when the first optical characteristic is acquired from the memory 72. Further, for example, the control unit 70 calls the correction information (for example, spherical power, cylinder power, cylinder axis) by the correction optical system when the second optical characteristic is acquired. As for the correction information of the correction optical system, the control unit 70 may associate the correction information of the correction optical system at the time of acquisition of each optical characteristic with each optical characteristic and store it in the memory 72.

For example, the control unit 70 calls the first correction information at the time of acquiring the first optical characteristic and the second correction information at the time of acquiring the second optical characteristic from the memory 72. For example, the control unit 70 may correct the first optical characteristic based on the first correction information and correct the second optical characteristic based on the second correction information. For example, the spherical power of the first correction information is 1.0D, the spherical power of the second correction information is 4.0D, the spherical power of the first optical characteristic is 1.0D, and the spherical power of the second optical characteristic is 5.0D. If there is, the spherical power of the first optical characteristic is 0D when there is no influence of the straightening optical system, and the spherical power of the second optical characteristic is 1.0D when there is no influence of the straightening optical system. From this, when the spherical power of the first optical characteristic and the spherical power of the second optical characteristic are differentially processed in the absence of the influence of the correction optical system, the adjustment information becomes 1.0D. That is, it can be seen that a change in spherical power of 1.0D occurred during the subjective measurement. In the above configuration, the correction information has been described by taking the spherical power as an example, but the present invention is not limited to this. For example, at least one of the spherical power, the astigmatic power, and the astigmatic axis angle may be used as the correction information.

It should be noted that the correction optical system was not driven (not corrected) when the first optical characteristic was acquired, and the correction optical system was driven only when the second optical characteristic was acquired. In the case of (correction has been performed), it is possible to acquire adjustment information in consideration of the correction optical system by correcting only the second optical characteristic with the second correction information. Of course, it was not driven by the straightening optical system (not straightened) when acquiring the second optical characteristic, and was driven by the straightening optical system only when acquiring the first optical characteristic. In the case of (correction has been performed), it is possible to acquire adjustment information in consideration of the correction optical system by correcting only the first optical characteristic with the first correction information.

In the present embodiment, the case where the first optical characteristic and the second optical characteristic are corrected based on the correction information has been described as an example, but the present invention is not limited to this. For example, the adjustment information may be corrected based on the correction information. In this case, for example, the control unit 70 obtains correction information for use in correction by performing difference processing between the first correction information and the second correction information. For example, the spherical power of the first correction information is 1.0D, the spherical power of the second correction information is 4.0D, the spherical power of the first optical characteristic is 1.0D, and the spherical power of the second optical characteristic is 5.0D. If so, the correction information acquired for use in the correction is 3.0D from the difference between the first correction information and the second correction information. Further, for example, the adjustment information is 4.0D from the difference between the first optical characteristic and the second optical characteristic. Therefore, by correcting the adjustment information with the correction information, the adjustment information considering the influence of the correction optical system becomes 1.0D.

As described above, by correcting the measurement result obtained by objectively measuring the eye to be inspected based on the correction information, the measured luminous flux for measuring the objective measurement passes through the correction optical system. It is possible to correct the deviation of the optical characteristics caused by this. As a result, the optical characteristics can be accurately obtained even when the objective measurement is performed when the correction is performed by the correction optical system. For example, in particular, when acquiring adjustment information based on at least two optical characteristics acquired by objective measurement, it may be difficult to compare due to the deviation between the optical characteristics. This technique is more effective.

<Correction processing based on adjustment information (S6)>
For example, when the adjustment information is acquired, the control unit 70 outputs the adjustment information. In this embodiment, for example, the control unit 70 transmits adjustment information to a setting means for setting a correction amount for correcting a change in the adjustment state. In this embodiment, the control unit 70 also serves as a setting means. Of course, as a configuration different from the control unit 70, a setting means (setting control means) may be separately provided. In this embodiment, as a configuration for outputting the adjustment information, a configuration for transmitting the adjustment information to the setting means will be described as an example, but the present invention is not limited to this. For example, the adjustment information may be displayed on the monitor 4. Further, for example, the adjustment information may be printed. In this case, the examiner can confirm the adjusted state by checking the monitor 4 or the printed matter.

For example, in this embodiment, the control unit 70 adjusts the correction amount for correcting the change in the adjustment state of the eye to be inspected while the optical characteristics of the eye to be inspected are being subjectively measured by the subjective measurement means. Set based on. For example, the control unit 70 controls the correction optical system 60 to perform correction based on the set correction amount to cancel the change in the adjustment state of the eye to be inspected caused by the subjective measurement means (S6). The configuration for canceling the change in the accommodation state of the eye to be inspected caused by the subjective measurement means is not limited to the correction optical system 60. The configuration may be such that a different optical system for correction is provided separately.

For example, the control unit 70 sets the correction amount based on the acquired adjustment state. For example, the control unit 70 controls the correction optical system. For example, as for the correction amount, a table preset for each parameter of the adjustment information may be created, and the created table may be stored in a memory (for example, a memory 72). In this case, for example, the control unit 70 may call the correction amount corresponding to the adjustment state from the memory 72 and set it. Further, for example, as for the correction amount, an arithmetic expression for deriving the correction amount for each parameter of the adjustment information is stored in the memory 72, and the correction amount may be obtained using the arithmetic expression.

For example, the control unit 70 corrects the correction state of the correction optical system at the time of subjective measurement. For example, the control unit 70 makes a correction to add a correction amount. For example, when the spherical power of the correction optical system at the time of subjective measurement is 2.0D and the spherical power of the adjustment information is 1.0, the correction amount is set to 1.0D. For example, the control unit 70 corrects the spherical power of the correction optical system 60 with a correction amount of 1.0D. That is, the control unit 70 corrects the spherical power of the straightening optical system to 1.0D by controlling the straightening optical system 60.

In this embodiment, a configuration in which a correction for canceling a change in the adjustment state of the eye to be examined is performed based on the adjustment information has been described as an example, but the present invention is not limited to this. For example, the quality of the adjustment information may be determined based on the adjustment information, and the determination result may be displayed on the monitor 4 or the printed matter. In this case, the examiner may confirm the determination result and perform processing according to the determination result. For example, the examiner may perform an action to improve the adjustment state.

As described above, for example, in the present embodiment, the optical characteristics of the eye to be inspected are objectively measured by the objective measurement means while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measurement means. By doing so, it is possible to confirm the change in the optical characteristics of the eye to be inspected during the subjective measurement. As a result, the examiner can perform the subjective measurement in consideration of the change in the optical characteristics of the eye to be inspected during the subjective measurement. Therefore, when the examiner subjectively measures the optical characteristics of the eye to be inspected, the examiner can accurately measure the optical characteristics of the eye to be inspected.

Further, for example, in the present embodiment, the first optical characteristic is obtained by objectively measuring, and the second optical is objectively measured while subjectively measuring the optical characteristic of the eye to be inspected. Get the characteristics. The adjustment information based on the acquired first optical characteristic and the second optical characteristic is acquired, and the adjustment information is output. With such a configuration, changes in the optical characteristics of the eye to be inspected during the subjective measurement can be easily obtained from the adjustment information based on the first optical characteristics and the second optical characteristics of the inspected eye. Therefore, the examiner can easily and accurately measure the optical characteristics of the eye to be inspected when subjectively measuring the optical characteristics of the eye to be inspected by using the adjustment information.

Further, for example, in the present embodiment, the optical characteristics of the eye to be inspected are objectively measured by the objective measurement means before the optical characteristics of the eye to be inspected are subjectively measured by the subjective measurement means. As a result, the objective measurement is performed before the subjective measurement by the subjective measurement means, so that the change in the optical characteristics caused by the use of the subjective measurement means is suppressed, and the objective measurement is performed. The optical characteristics can be obtained by measuring the equation. Therefore, it is possible to acquire the optical characteristics by objective measurement in which the change in the optical characteristics is suppressed, and it is possible to acquire better adjustment information.

Further, for example, in the present embodiment, by acquiring the adjustment information by the comparison processing, the change in the optical characteristics of the eye to be inspected during the subjective measurement can be more easily acquired from the comparison processing adjustment processing. .. Therefore, the examiner can more easily and accurately measure the optical characteristics of the eye to be inspected when subjectively measuring the optical characteristics of the eye to be inspected by using the adjustment information.

Further, for example, in the present embodiment, a correction amount for correcting the change in the accommodation state of the eye to be inspected is set based on the adjustment information, and the change in the accommodation state of the eye to be inspected occurs by the subjective measurement means based on the correction amount. Is being corrected to cancel. As a result, even if a change in the optical characteristics of the eye to be inspected occurs while the optical characteristics of the inspected eye are being subjectively measured by the subjective measuring means, the measurement is performed in a state where the change in the optical characteristics is cancelled. It can be performed. As a result, when the optical characteristics of the eye to be inspected are subjectively measured, the optical characteristics of the eye to be inspected can be easily and accurately measured.

<Initial value setting>
For example, in the present embodiment, the subjective eye examination device 1 starts the subjective measurement of the optical characteristics of the eye to be inspected by the subjective measurement means, then performs the objective measurement, and is aware of the acquired measurement result. It may be set as the initial value of the correction optical system 60 when the optical characteristics of the eye to be inspected are subjectively measured by the measuring means.

FIG. 7 is a flowchart illustrating a flow of control operation of initial value setting in this embodiment. The initial value setting will be described below. For example, the control unit 70 starts the subjective measurement (S11). For example, when the monitor (also serving as the operation unit in the present embodiment) 4 is operated by the examiner, for example, the control unit 70 controls the display 31 and displays a required visual acuity value optotype on the optical axis L2. indicate.

For example, the control unit 70 starts the subjective measurement of the optical characteristics of the eye to be inspected by the subjective measuring means, and then objectively measures the optical characteristics of the inspected eye by the objective measuring means to obtain the optics of the inspected eye. Acquire the characteristics (S12). For example, in the present embodiment, when the initial presentation target is presented on the display 31, the control unit 70 objectively measures the optical characteristics of the eye to be inspected by the objective measuring means and acquires the optical characteristics of the eye to be inspected. do. That is, in this embodiment, the timing at which the initial presentation target is presented is used as the timing for starting the subjective measurement. Of course, the timing of subjective measurement start is not limited to the timing at which the initial presentation target is presented.

For example, the timing of starting the subjective measurement may be a state in which the control of the subjective measurement is started. For example, as the timing of starting the subjective measurement, the timing of starting the inspection program, the monitor of the subjective inspection device 1 (also serving as the operation unit in this embodiment) 4, and the driving of the correction optical system 60 are started. It may be at least one of the timing and the like.

For example, the control unit 70 sets the objectively measured optical characteristics of the eye to be inspected as the initial value of the correction optical system 60 when the optical characteristics of the eye to be inspected are subjectively measured by the subjective measurement means (S13). ). For example, in this embodiment, as an optical characteristic used for setting the initial value, an optical power (for example, spherical power, astigmatic power, astigmatic axis angle) will be described as an example. In this embodiment, the optical power of the eye is described as an example of the optical characteristics used for setting the initial value, but the present invention is not limited to this. For example, the optical characteristics used for setting the initial value may be different optical characteristics. Further, for example, as the optical refractive power used for setting the initial value, at least one of the spherical power, the astigmatic power, and the astigmatic axis angle may be used.

For example, in the present embodiment, the control unit 70 is aware of the optical characteristics of the eye to be inspected objectively measured by the objective measuring means before starting the objective measurement by the objective measuring means. It is set as the initial value of the correction optical system in the subjective measurement (S11) of the optical characteristics of the eye to be inspected, which has been carried out by the measuring means. It should be noted that the subjective measurement may be continuously performed while the optical characteristics of the eye to be inspected are acquired by the objective measurement means. Further, the subjective measurement may be temporarily stopped while the optical characteristics of the eye to be inspected are acquired by the objective measurement means. In this case, the initial value may be set and the control unit 70 may restart the subjective measurement. Further, in this case, after the initial value is set, the examiner may select a switch to start the subjective measurement so that the subjective measurement is restarted.

For example, the control unit 70 acquires the optical refractive power of the eye to be inspected by means of objective measurement means. For example, when the control unit 70 acquires the optical power of the eye to be inspected, the control unit 70 drives the correction optical system 60 based on the optical power of the eye to be examined and sets it as an initial value of the subjective examination. For example, the objective measuring means controls the correction optical system 60 so as to correct the refraction error of the eye to be inspected based on the optical power of the eye to be inspected.

For example, when the correction optical system 60 is controlled and the initial value setting is completed, the examiner changes the correction degree of the correction optical system 60 by using the monitor 4 from the state where the initial value setting is completed, and the eye to be inspected. (S15). That is, the subjective measurement is performed from the state where the setting of the initial value is completed.

For example, in this embodiment, after the subjective measurement of the optical characteristics of the eye to be inspected is started by the subjective measurement means, the optical characteristics of the eye to be inspected are objectively measured by the objective measurement means to obtain the optics of the eye to be inspected. Get the characteristics. The objectively measured optical characteristics of the eye to be inspected are set as initial values of the correction optical system when the optical characteristics of the eye to be inspected are subjectively measured by the subjective measurement means. With such a configuration, it is not necessary to wait for the subjective measurement by the subjective inspection device until the objective measurement is completed, and the optical characteristics of the eye to be inspected can be measured quickly.

Further, for example, in the present embodiment, the optical characteristics of the eye to be inspected objectively measured by the objective measuring means are measured by the subjective measuring means before the objective measurement by the objective measuring means is started. It is set as the initial value of the correction optical system in the subjective measurement of the optical characteristics of the eye to be inspected. With such a configuration, it is possible to quickly perform subjective measurement by a subjective inspection device.

In this embodiment, the optical characteristics of the objectively measured eye to be inspected are measured by the subjective measurement means before the objective measurement by the objective measurement means is started. Although the configuration set as the initial value of the correction optical system in the subjective measurement of the optical characteristics of the above is described as an example, the present invention is not limited to this. For example, the control unit 70 performs the first subjective measurement for subjectively measuring the optical characteristics of the eye to be inspected by the subjective measuring means, and then again subjectively measures the optical characteristics of the eye to be inspected by the subjective measuring means. Perform a second subjective measurement. After starting the first subjective measurement, the control unit 70 objectively measures the optical characteristics of the eye to be inspected by the objective measuring means. The control unit 70 sets the optical characteristics of the eye to be inspected objectively measured by the objective measurement means as the initial value of the second subjective measurement. For example, the first subjective measurement is a measurement that acquires optical characteristics different from the optical characteristics acquired by the second subjective measurement. In this case, for example, the first subjective measurement may be a subjective measurement in which the optical characteristics of the eye to be inspected are subjectively measured in an uncorrected state in which the optical characteristics of the target luminous flux are not changed by the correction optical system. .. That is, the first subjective measurement may be an unaided eye examination. For example, the second subjective measurement may be a subjective measurement in which the optical characteristics of the target luminous flux are changed by the correction optical system to subjectively measure the optical characteristics of the eye to be inspected.

For example, in this embodiment, after performing the first subjective measurement for subjectively measuring the optical characteristics of the eye to be inspected by the subjective measuring means, the optical characteristics of the eye to be inspected are subjectively measured again by the subjective measuring means. Perform a second subjective measurement. After starting the first subjective measurement, the optical characteristics of the eye to be inspected are objectively measured by the objective measurement means, and the optical characteristics of the objectively measured eye are measured in the initial stage of the second subjective measurement. Set as a value. With such a configuration, even when the subjective measurement is performed again, the initial value has already been acquired at different subjective measurements, so that the measurement can be performed quickly.

1 Subjective eye examination device 2 Housing 3 Presentation window 4 Monitor 5 Jaw stand 6 Base 7 Measuring means 10 Objective measurement optical system 25 Subjective measurement optical system 30 Floodlight optical system 45 1st index Projection optical system 46 2nd Index projection optical system 50 Observation optical system 60 Correction optical system 70 Control unit 72 Memory 81 Deflection mirror 84 Half mirror 85 Concave mirror 90 Correction optical system 100 Imaging optical system

Claims (2)

It has a correction optical system that is arranged in the optical path of a projection optical system that projects the target light beam toward the eye to be inspected and changes the optical characteristics of the target light beam, and is aware of the optical characteristics of the eye to be inspected. It is a optometry device that is equipped with a conscious measuring means for measuring optometry and subjectively measures the optical characteristics of the optometry.
An objective measuring means that has a measuring optical system that emits measurement light to the fundus of the eye to be inspected and receives the reflected light, and objectively measures the optical characteristics of the eye to be inspected.
A control means for objectively measuring the optical characteristics of the eye to be inspected by the objective measuring means while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means.
Equipped with
The control means objectively measures the optical characteristics of the eye to be inspected by the objective measuring means to acquire the first optical characteristics, and is aware of the optical characteristics of the eye to be inspected by the subjective measuring means. The optical characteristic of the eye to be inspected is objectively measured by the objective measuring means to obtain the second optical characteristic.
An acquisition means for acquiring adjustment information based on the first optical characteristic and the second optical characteristic, and
An output means for outputting the adjustment information and
Equipped with
The correction optical system is arranged in the optical path of the measurement optical system.
A subjective type including a second correction means for correcting the measurement result obtained by objectively measuring the eye to be inspected by the objective type measuring means based on the correction information by the correction optical system. Optometry device. It has a measurement optical system that emits measurement light to the fundus of the eye to be inspected and receives the reflected light. A projection optical system that projects toward the light beam and a correction optical system that is arranged in the optical path of the projection optical system and changes the optical characteristics of the target light beam. It is a subjective eye inspection program used in a subjective eye examination device that has, has a subjective measurement means for subjectively measuring the optical characteristics of the eye to be inspected, and subjectively measures the optical characteristics of the eye to be inspected. By being executed by the processor of the subjective eye examination device,
A control step for objectively measuring the optical characteristics of the eye to be inspected by the objective measuring means while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means. While the objective measurement means objectively measures the optical characteristics of the eye to be inspected to acquire the first optical characteristics, and the subjective measurement means is used to subjectively measure the optical characteristics of the eye to be inspected. In addition, a control step of objectively measuring the optical characteristics of the eye to be inspected by the objective measuring means to acquire the second optical characteristics, and
An acquisition step for acquiring adjustment information based on the first optical characteristic and the second optical characteristic, and
An output step that outputs the adjustment information and
A second correction step for correcting the measurement result obtained by objectively measuring the eye to be inspected by the objective measuring means based on the correction information by the correction optical system.
A optometry program, characterized in that the optometry device is executed.

Images