JP6853495B2 - 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, an orthodontic optical system capable of correcting the refractive index is individually arranged in front of the subject's eye, and an examination target is projected onto the fundus of the eye to be inspected via the orthodontic 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 to obtain the correction value, and measures the refractive power of the subject's eye based on this correction value. .. Further, for example, as a subjective optometry device, an examination target via an orthodontic optical system forms an image in front of the subject's eyes, and measures the refractive power of the optometry without arranging the orthodontic optical system in front of the eyes. Is known (Patent Document 2).

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

By the way, as a test for measuring the optical characteristics of the eye to be inspected, after objectively measuring the optical characteristics of the eye to be inspected, the optical characteristics of the eye to be inspected are made aware of by a subjective inspection device in consideration of the measurement result. Is being measured. However, when the inspections are performed in such an order, it takes time because the subjective measurement by the subjective inspection device cannot be performed until the objective measurement is completed.

In view of the above problems, it is a technical subject of the present disclosure to provide a subjective optometry apparatus capable of rapidly measuring the optical characteristics of an eye to be inspected.

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

(1) The subjective eye inspection device according to the first aspect of the present disclosure is a correction that changes the optical characteristics of the target light beam in the optical path of the projection optical system that projects the target light beam toward the eye to be inspected. It is a subjective eye-examination device that has an optical system and is provided with a subjective measuring means for subjectively measuring the optical characteristics of the eye to be inspected, and is capable of subjectively measuring the optical characteristics 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. After starting the subjective measurement of the optical characteristics, and before the correction of the eye to be inspected by the correction optical system , while the subjective measurement is being performed, the eye to be inspected by the objective measuring means. The control means for objectively measuring the optical characteristics of the eye to obtain the optical characteristics of the eye to be inspected and the optical characteristics of the eye to be inspected objectively measured by the control means are carried out by the subjective measuring means. It is characterized by comprising an initial value setting means for setting as an initial value of the correction optical system used for the subjective measurement.
(2) The subjective eye examination program according to the second aspect of the present disclosure is a correction that changes the optical characteristics of the target light beam in the optical path of the projection optical system that projects the target light beam toward the eye to be inspected. It has an optical system, a subjective measuring means for subjectively measuring the optical characteristics of the eye to be inspected, and a measuring optical system that emits measurement light to the fundus of the eye to be inspected and receives the reflected light. A subjective eye examination program used in a subjective eye examination device that subjectively measures the optical characteristics of an eye to be inspected, comprising an objective measurement means for objectively measuring the optical characteristics of the eye to be inspected. After the subjective measurement of the optical characteristics of the eye to be inspected is started by the subjective measurement means by being executed by the processor of the subjective eye examination device, and before the correction of the eye to be inspected by the correction optical system. A control step of objectively measuring the optical characteristics of the eye to be inspected by the objective measuring means to acquire the optical characteristics of the eye to be inspected while performing the subjective measurement, and the control step. Initial value setting for setting the objectively measured optical characteristics of the eye to be inspected as the initial value of the corrective optical system used for the subjective measurement performed by the subjective measuring means. The step is performed by the subjective eye examination device.

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 control operation of initial value setting.

Hereinafter, one of the typical embodiments will be described with reference to the drawings. 1 to 7 are diagrams for explaining a subjective optometry apparatus and a 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 device 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 (the left-right direction of the person) will be described as the X direction, and the vertical direction (the 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, and binocular vision function (for example, oblique amount, stereoscopic vision). 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. The light projecting optical system does not need to be integrally provided in the subjective measuring means, and a device provided with a light projecting 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.

<Throwing optical system>
For example, a projectile optical system has a light source that projects an optotype luminous flux. Further, for example, the projection optical system may include 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 DMD (Digital Micromirror Device) may be used as a light source for projecting an optotype 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 polarized light.

For example, the light source for projecting the optotype luminous flux may have a configuration including 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 target luminous flux, a light source other than the above configuration may be used.

<Correction optical system>
For example, the correction optical system may have a configuration that changes the optical characteristics of the target luminous 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 target 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 wave surface 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 eye to be examined is corrected by optically changing the presentation position (presentation distance) of the optotype with respect to the eye of the subject. In this case, for example, as a configuration in which the presentation position (presentation distance) of the optotype is optically changed, the light source (for example, the display) may be 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 moved in the optical axis direction. Of course, the correction optical system may have a configuration in which the optical element is controlled and the optical element arranged in the optical path is moved in the optical axis direction.

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 an optotype luminous flux from a light projecting optical system toward an eye to be inspected and an optotype presenting means to control the optical element. By doing so, the optical characteristics of the target luminous flux 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 according to 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 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 imaging result imaged by the objective measuring 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 test and the measurement optical system for the left eye test is completed. Further, for example, the different timing may be during the measurement of one of the measurement optical system for the right eye test and the measurement optical system for the left eye test.

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 adjust to and measure the other eye to be inspected.

<Measurement optical system>
For example, the measurement optical system includes a light projection optical system that projects the measurement light from the light source toward the subject's eye fundus and an imaging 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 that measures 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 portion of the pupil of the eye to be inspected, and the fundus reflected light reflected from the fundus is passed through the peripheral portion of the pupil. Examples thereof include 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. 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 fundus reflected light is extracted from the central portion of the pupil, and the image sensor is made to image the ring-shaped fundus reflection image. The configuration can be 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 on 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 measuring means while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring 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 subjectively measured by the subjective measuring means, and the optical characteristics of the eye to be inspected are objectively measured by the objective 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 during one or more subjective tests.

For example, at least one or more subjective tests include 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 measures the eye to be inspected by the objective measuring means while performing the subjective test of one of the plurality of subjective tests by the subjective measuring means. The optical characteristics may be measured objectively. 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, a subjective optometry device includes a transmitting means for transmitting an objective measurement start trigger signal for initiating objective measurement by an objective measuring means and a receiving means for receiving an objective measurement start trigger signal. You may. For example, when the transmitting means transmits the objective measurement start trigger signal and the receiving means receives the objective measurement start trigger signal, the control means is performing at least one or more subjective tests. 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 apparatus. 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 the 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 in which the optical characteristics of the eye to be inspected are objectively measured by the objective measuring means while performing at least one subjective test, the minimum number of measurements is one, etc. The objective measurement may be performed, or the objective measurement may be performed constantly (in real time) as the maximum number of 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, a preset number of objective measurements may be performed. 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. To 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 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 timings include 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 elapses (for example, when a predetermined time elapses 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 the 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 in which the optical characteristics of the eye to be inspected are objectively measured by the objective measuring means while performing at least one subjective test, the minimum number of measurements is one, etc. The objective measurement may be performed, or the objective measurement may be performed constantly (in real time) as the maximum number of 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 a plurality of 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 measurement start trigger signals are output while performing at least one subjective test, a plurality of objective measurements are performed. 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 can be performed. Good.

In addition, for example, when a plurality of objective measurements are performed by outputting one objective measurement start trigger signal, one time during at least one or more subjective tests. 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 or more subjective tests are 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. During the subjective measurement, 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 this 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, while objectively measuring the first optical characteristic and subjectively measuring the optical characteristic of the eye to be inspected, the second optical characteristic measured objectively is obtained. 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 eye to be inspected. 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 eye refractive power is used when acquiring the adjustment information, at least one of the spherical power, the astigmatic power, and the astigmatic axis angle may be used.

For example, the timing of 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 measuring means before the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring 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 formula. 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, the timing of 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 that can compare the first optical characteristic and the second optical characteristic. 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 degree value, an astigmatism value, an astigmatism axis angle value, and the like.

For example, the difference image may be an image obtained by performing difference processing of the brightness 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 brightness 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 brightness value of each captured image does not become zero.

For example, when performing the difference processing, an arbitrary 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 the optical characteristics are further 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.

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 criterion, and outputs the determination result. You may try to do it.

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.

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 second region. 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 in which the above information is used in combination.

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 combined. 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 eye to be inspected are subjectively measured by the subjective measuring means, the optical characteristics of the eye 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 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. Alternatively, 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 at a timing different from the timing at which the first optical characteristics are acquired, the objective measuring means is used. 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 using the subjective optometry device. As a result, when measuring the optometry using the subjective optometry device, the optometry can be measured with high accuracy.

<Correction processing based on adjustment information>
For example, in the present embodiment, the subjective optometry device may include setting means (for example, 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 a change in the adjustment state of the eye to be inspected while subjectively measuring the optical characteristics of the eye to be inspected 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 eye to be inspected 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 set in advance 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 for 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, it does not require complicated control or a separate correction means for canceling the adjustment state change, so that the optical system has a simple configuration. Aberration 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 wave surface 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-described 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 apparatus 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 measurement 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. it can. As a result, the optical characteristics can be accurately acquired 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 technology 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 characteristics and the second optical characteristics 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.

<Initial value setting for subjective examination>
In the present embodiment, for example, the subjective optometry device may include initial value setting means (for example, 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 measuring means after starting the subjective measurement of the optical characteristics of the eye to be inspected by the subjective measuring 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 examination 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 subjective measurement may be a state in which control of subjective measurement is started. More specifically, for example, the start of subjective measurement means a state in which projection of an optotype luminous flux is started, a state in which an inspection program is started, a state in which operation of an operation unit of a subjective inspection device is started, and a corrective 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, which has been 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 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. 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 (second subjective test) different from the subjective test (first subjective test) performed when the objective measurement is started as the subjective test set as the initial value. In the inspection), the optical characteristics of the eye to be inspected measured objectively 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 becomes aware of the optical characteristics of the eye to be inspected by the subjective measuring means. The second subjective measurement 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 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 in which the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means, the optical characteristics of the eye to be inspected are 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) that subjectively measures the optical characteristics when the eye to be inspected is wearing spectacles. In these cases, for example, the first subjective measurement is a subjective measurement in which the optical characteristics of the eye to be inspected are subjectively measured by the correction optical system in an uncorrected state in which the optical characteristics of the optotype beam are not changed. The second subjective measurement may be a subjective measurement in which the optical characteristics of the optotype 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 eye to be inspected is fixed when the optical characteristic of the eye to be inspected is objectively measured by the objective measurement means for the luminous flux of the optotype obtained by the projection optical system. It may be configured to be used as an optometry target 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 luminous flux of the optotype 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 apparatus of this embodiment will be described. For example, FIG. 1 is an external view of the optometry device 1 according to the present embodiment. For example, the subjective optometry device 1 in this 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 right eye measuring means (right eye measuring means) 7R and a left eye measuring means (left eye measuring means) 7L. In the present embodiment, the right eye measuring means 7R and the left eye measuring means 7L are provided with 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 right-eye measuring means 7R and the left-eye measuring means 7L may have at least a part different from each other.

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 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 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 base 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 eye to be inspected 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 and a lens (not shown). For example, an imaging optical system is used to photograph 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 left eye measuring means 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 measurement 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.

<Awareness 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 (objective 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 fixation target for fixing the eye E to be inspected (used for objective measurement or the like 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 taking as an example a configuration using two positive cylindrical lenses 61a and 61b, but the present invention is not limited to this. 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 moved 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 cloud fog on the subject 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 cylindrical power, and the cylindrical shaft is described as an example, but the present invention is not limited to this. For example, a correction optical system in which the prism value is corrected may be provided. By providing the correction optical system for 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 eye to be examined.

In this embodiment, a configuration in which an astigmatism correction optical system 63 having a cylindrical power and a cylindrical axis and a spherical power correction optical system (for example, a driving means 39) are separately provided has been 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 power, and the cylindrical shaft are corrected. For example, the correction optical system may be an optical system that modulates the wave surface. Further, for example, the straightening optical system may be an optical system that corrects spherical power, cylindrical power, 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, dispersion 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, the optical element (for example, a cylindrical lens, a cross cylinder lens, a rotary prism, etc.) arranged on the optical axis L2 is rotated and controlled by the drive unit, so that 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 is composed of 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 Madox lens, and an auto cross cylinder lens is arranged on the auxiliary lens disc. 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 have a configuration capable of correcting 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 provided is given as an example, but the present invention is not limited to this. The correction optical system 60 may also be used 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 cylindrical power and the cylindrical axis in consideration of the amount of astigmatism (corrected). 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 aberration are not required, so that the optical aberration is 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 E to be inspected through the central portion of the pupil of the eye E to be inspected. 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 hall 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 deviating from 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 light flux deflecting 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 luminous flux by the subjective measurement optical system 25 and the measurement light by the projection optical system 10a and guides them 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 collimator 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 portion, 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 sensor 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 measurement light from the projection 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 anterior segment 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 to the fundus, the fundus reflected light is extracted from the central portion of the pupil, and the ring-shaped measurement index is formed on the two-dimensional image sensor. Well-known ones such as a configuration for receiving a fundus reflection image can be used.

The objective measurement optical system 10 is not limited to the above, and the light 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 a measurement optical system having a light receiving optical system that receives light by a 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 sensor 22 move integrally as the drive unit 95. Of course, each may be driven separately.
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 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 hole 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 of the eye 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, and the like. 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 is reversed as if there was no eccentricity of the projected luminous flux / reflected luminous flux (received luminous 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 on 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. In this figure of FIG. 2, for convenience, only a part of the first index projection optical system 45 and the second index projection optical system 46 is shown. The second index projection optical system 46 is also used as anterior segment 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 segment 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 left eye measuring means 7L for convenience of explanation. Note that FIG. 5 shows only the optical axis of the left eye measuring means 7L 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 deflection 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. For example, the objective measuring means includes a measuring means 7, a deflection mirror 81, a half mirror 84, and a concave mirror 85. Of course, the objective measuring means is not limited to this configuration.

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 luminous flux corrected by the correction optical system 60 is guided to the eye to be inspected, and the image of the target light flux 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 pair of left and right deflection mirrors 81R for the right eye and a deflection mirror 81L for the left eye, respectively. For example, the deflection mirror 81 is arranged between the correction optical system 60 and the eye to be inspected. That is, the correction optical system 60 has a right eye correction optical system and a left eye correction optical system provided in pairs on the left and right, and the right eye deflection mirror 81R has a right eye correction optical system and a right eye correction optical system. The deflection mirror 81L for the left eye is arranged between the eye ERs and is arranged between the left eye correction optical system 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 it 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 driving 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 between the right eye optical path and the left eye optical path in the X direction 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 driving 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 is 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, when the deflection mirror 81 is rotationally moved, the image of the correction optical system 60 is formed in front of the eye to be inspected, so that the apparent luminous flux can be deflected to optically correct the image formation position. it can.

For example, the concave mirror 85 is shared by the right eye measuring means 7R and the left eye measuring means 7L. For example, the concave mirror 85 is shared by the right eye optical path including the right eye correction optical system and the left eye optical path including the left eye correction optical system. 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 corrective optical system for the right eye and the optical path for the left eye including the corrective 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 target luminous 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 through 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 through 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, the optical axis between the concave mirror 85 and the eye E to be inspected in the subjective measuring means and the area between the concave mirror 85 to the eye E to be inspected in the objective measuring means. Is composed of at least coaxial with the optical axis of. In the present embodiment, the dichroic mirror 35 synthesizes the optical axis L2 of the subjective measurement optical system 25 and the optical axis L1 of the objective measurement optical system 10 so as to be coaxial.

Hereinafter, the optical path of the subjective measurement means will be described. For example, the subjective measurement means guides the target luminous flux to the eye to be inspected by reflecting the optotype light flux that has passed through the correction optical system 60 in the direction of the eye to be inspected by the concave mirror 85, 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.

This will be described 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 light projecting lens 33. The target light beam that has passed through the astigmatism 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 target luminous flux that has passed through the correction optical system 90 is projected from the left eye measuring means 7L toward the left eye deflection mirror 81L. The luminous flux 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 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 eye 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 based on the correction value. The optical characteristics of the eye to be examined are measured consciously.

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 measurement 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 corrected by the correction optical system. It is incident on 90. The measurement light that has passed through the correction optical system 90 is projected from the left eye measuring means 7L toward the left eye deflection mirror 81L. 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 be collected by the dichroic mirror 29. , Dichroic mirror 35, prism 15, hole mirror 13, relay lens 16, and mirror 17. The reflected light passing through the mirror 17 is collected again on the opening of the light receiving diaphragm 18, is converted into a substantially parallel luminous flux (in the case of an emmetropic eye) by the collimator lens 19, and is taken out as a ring-shaped luminous 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 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 examinations, 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 a 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 puts the subject's chin on the chin rest 5 and instructs the examiner to observe the presentation window 3. The examiner instructs the examinee to fix the fixation target displayed on the display 31, and then aligns the eye to be examined.

<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 near use as well as in the far 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 image of the anterior segment of the eye 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 aligns in the XY direction by driving the deflection mirror 81, and aligns in the Z direction by driving the measuring means 7.

In the present embodiment, a configuration in which the alignment in the XYZ directions is adjusted by driving the deflection mirror 81 and the measuring means 7 is described as an example, but the present embodiment 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 eye to be inspected is completed, the other eye to be inspected is displayed on the monitor 4 and the other eye to be inspected. 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 displacement 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 image formation position. Optically correct. As described above, the subjective optometry device 1 in the present embodiment has a configuration in which the positional deviation between the eye to be inspected and the correction optical system is detected and the image formation position is optically corrected. As a result, by correcting the misalignment between the eye to be inspected and the corrective optical system, the device can be used at an appropriate position, and measurement can be performed with high accuracy.

<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 sensor 22.

For example, in the measurement of the objective refractive power, the preliminary measurement of the refractive power of the eye 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. Cloud 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 of the eye to be inspected may be subjected to cloud fog. In this measurement, the measured image is captured by the image sensor 22, and the output signal from the image sensor 22 is stored in the memory 72 as image data (measured image). After that, the control unit 70 analyzes the ring image stored in the memory 72 to obtain the value of the refractive power in each meridian direction. By applying a predetermined process to this refractive power, the control unit 70 performs 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 power 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 refractive power of the eye 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 eye refractive power is continuously measured (for example, a plurality of the main measurements are performed), the correction optical system 90 may be controlled based on each measurement result.

In the above description, the objective refractive power for long-distance use was measured, but the present invention is not limited to this, and the near-use is the refractive power for the eye when the optotype is presented at a near-distance distance. The objective 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.

<Awareness measurement (S3)>
Then, the subjective measurement (S3) is performed. When the objective refractive power measurement is completed and the monitor (also serving as the operation unit in the present 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 visual acuity 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 visual acuity value one step higher. On the other hand, if the subject's answer is incorrect, the visual acuity value 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 use the monitor 4 to change the correction power of the correction optical system 60 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-measuring 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 addition and accommodation may be consciously obtained by changing the display 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 display 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 presentation 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 presentation 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 fluxes. In this case, for example, the control unit 70 acquires an aberration correction amount corresponding to the deflection angle of the light 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 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. As a result, even if the convergence angle is changed, the target with reduced aberration is presented.

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. Perceived eye refractive power (nearby perceived value) may be measured. In the near vision 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 being examined during the subjective measurement.

The acquisition of adjustment information (S5) will be described below. 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 consciously 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 to acquire the first optical characteristics. For example, while the control unit 70 subjectively measures the optical characteristics of the eye to be inspected by the subjective measuring means, the control unit 70 objectively measures the optical characteristics of the eye to be inspected by the objective measuring means to perform 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 a configuration 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 measures the second optical characteristic when a preset time elapses after the start of the subjective measurement (for example, one minute after the start of the subjective measurement). You may. 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 elapses. The second optical characteristic can be acquired by using various configurations as triggers. 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 target luminous flux is projected, 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 unit 70 optics. 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 accommodation 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 optical 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 of refraction, 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 straightening 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 correction optical system, and the spherical power of the second optical characteristic is 1.0D when there is no influence of the correction optical system. From this, when the spherical power of the first optical characteristic and the spherical power of the second optical characteristic are subjected to the difference processing in the case where there is no 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 spherical power, astigmatic power, and 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 (correction has been performed), by correcting only the second optical characteristic with the second correction information, it is possible to acquire the adjustment information in consideration of the correction optical system. Of course, when the second optical characteristic was acquired, it was not driven by the straightening optical system (it was not corrected), and when the first optical characteristic was acquired, it was driven by the straightening optical system. In the case (correction has been performed), by correcting only the first optical characteristic with the first correction information, it is possible to acquire the adjustment information in consideration of the correction optical system.

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 acquired 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 technology 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 the present 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 adjustment information, a configuration for transmitting 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 adjustment 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 adjustment state of the eye to be inspected caused by the subjective measurement means is not limited to the correction optical system 60. A different optical system for correction may be 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 set in advance 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, while the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means, the optical characteristics of the eye to be inspected are objectively measured by the objective measuring 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 eye to be inspected. 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 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 formula. 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 based on the correction amount in the subjective measurement means. 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 eye to be inspected 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 optometry device 1 starts the subjective measurement of the optical characteristics of the eye to be inspected by the subjective measuring means, then performs the objective measurement, and is aware of the acquired measurement result. It may be set as an 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 eye to be inspected by the objective measuring means to obtain the optics of the eye to be inspected. Acquire the characteristics (S12). For example, in this 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 to acquire the optical characteristics of the eye to be inspected. To 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 the optical characteristics used for setting the initial value, the 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 spherical power, astigmatic power, and astigmatic axis angle may be used.

For example, in this 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 can be restarted.

For example, the control unit 70 acquires the optical 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 refractive 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 power 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 initial value setting 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 examination 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 eye to be inspected measured objectively were measured by the subjective measuring means before the objective measurement by the objective measuring means was started. The configuration set as the initial value of the correction optical system in the subjective measurement of the optical characteristics of the above has been described as an example, but 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 that subjectively measures the optical characteristics of the eye to be inspected 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 a naked 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 in which the optical characteristics of the eye to be inspected are subjectively measured by the subjective measuring means, the optical characteristics of the eye to be inspected are 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 optometry 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 changes the optical characteristics of the target light beam in the optical path of the projection optical system that projects the target light beam toward the eye to be inspected, 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 to be inspected.
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.
After starting the subjective measurement of the optical characteristics of the eye to be inspected by the subjective measuring means, during the subjective measurement and before the correction of the eye to be inspected by the correction optical system , the said A control means for objectively measuring the optical characteristics of the eye to be inspected by an objective measuring means and acquiring the optical characteristics of the eye to be inspected.
Initial value setting that sets the optical characteristics of the eye to be inspected objectively measured by the control means as the initial value of the correction optical system used for the subjective measurement performed by the subjective measurement means. Means and
A subjective optometry device characterized by being equipped with. It has a correction optical system that changes the optical characteristics of the target light beam in the optical path of the projection optical system that projects the target light beam toward the eye to be inspected, and is aware of the optical characteristics of the eye to be inspected. Objective measurement means for objectively measuring the optical characteristics of the eye to be inspected, and a measurement optical system for emitting the measurement light to the fundus of the eye to be inspected and receiving the reflected light. It is a subjective optometry program used in a subjective optometry device that includes means and subjectively measures the optical characteristics of an eye to be inspected, and is executed by a processor of the optometry device.
After starting the subjective measurement of the optical characteristics of the eye to be inspected by the subjective measuring means, during the subjective measurement and before the correction of the eye to be inspected by the correction optical system , the said A control step of objectively measuring the optical characteristics of the eye to be inspected by an objective measuring means and acquiring the optical characteristics of the eye to be inspected.
The objectively measured optical characteristics of the eye to be inspected acquired by the control step are set as initial values of the corrective optical system used for the subjective measurement performed by the subjective measuring means. Initial value setting step and
A subjective optometry program, characterized in that the subject is executed by the subjective optometry apparatus.

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