JP2021065669A - Optometer - Google Patents

Abstract

To provide an optometer which can properly acquire the objective optical characteristics of a subject eye.SOLUTION: An optometer comprising measurement means which objectively measures the optical characteristics of a subject eye by projecting a measurement light flux to the ocular fundus of the subject eye and receiving the reflection light flux formed by reflecting the measurement light flux on the ocular fundus comprises: first setting means which can set any fogging parameter related to the fogging applied to the subject eye; fogging means which applies the fogging to the subject eye on the basis of any fogging parameter set by the first setting means; and acquisition means which controls the measurement means to acquire the optical characteristics of the subject eye applied with the fogging by the fogging means.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to an optometry device that objectively measures the optical characteristics of an eye to be inspected.

An optometry device that objectively measures the optical characteristics of an optometry by projecting a measured luminous flux onto the fundus of the eye to be inspected and receiving the reflected luminous flux in the fundus with a light receiving element is known (see, for example, Patent Document 1). ).

Japanese Unexamined Patent Publication No. 2006-187483

In objective measurement, cloud fog may be added to the eye to be inspected. For example, cloud fog is added to the eye to be inspected by arranging a fixation target at a position far from the far point of the eye to be inspected by a predetermined distance. As a result, the adjustment of the eye to be inspected can be released.

However, it was found that depending on the subject (for example, a child or the like), the adjustment could not be completely released due to the above-mentioned cloud fog, and the measurement was started with the adjustment working. In this case, it is not possible to properly acquire the objective optical characteristics of the eye to be inspected.

In view of the above-mentioned prior art, it is a technical subject of the present disclosure to provide an optometry apparatus capable of appropriately acquiring objective 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.

The eye examination device according to the present disclosure objectively measures the optical characteristics of the eye to be inspected by projecting the measured light beam onto the fundus of the eye to be inspected and receiving the reflected light beam reflected by the fundus of the eye. Based on the first setting means capable of setting an arbitrary cloud fog parameter related to the cloud fog to be added to the eye to be inspected, and the arbitrary cloud fog parameter set by the first setting means. A cloud fog means for adding the cloud fog to the eye to be inspected, and an acquisition means for controlling the measuring means and acquiring the optical characteristics of the eye to be inspected to which the cloud fog is added by the cloud fog means. And.

It is external block diagram of the optometry apparatus. It is a schematic block diagram of an optical system and a control system of an optometry apparatus. It is a graph which shows the presentation position and elapsed time of the fixation plate in objective measurement. This is an example of the display screen of the monitor. It is a figure which shows the change of the spherical refraction power when the normal mode is applied to an eye to be inspected. It is a figure which shows the change of the spherical refraction power when the pediatric mode is applied to the eye to be inspected.

<Overview>
The outline of the optometry apparatus according to the embodiment of the present disclosure will be described. Items classified by <> below can be used independently or in relation to each other.

<Means for acquiring subject information>
The optometry device may include subject information acquisition means (for example, control unit 170). The subject information acquisition means acquires subject information regarding the subject. For example, the subject information may be at least one of the age of the subject, accommodation information of the eye to be examined, whether or not an intraocular lens is inserted in the eye to be examined, and the like. The adjustment information may be any information related to the adjustment of the eye to be inspected. An example includes an accommodation range, accommodation power, and the like.

For example, the subject information acquisition means may acquire the subject information based on the signal input by the operator operating the operation means (for example, the monitor 107, the switch unit 108). Further, for example, the subject information acquisition means may acquire the subject information by reading the subject information from an electronic medical record or the like. Further, for example, the subject information acquisition means receives the measurement result by an eye accommodation measuring device capable of measuring the accommodation of the eye to be inspected (see, for example, Japanese Patent Application Laid-Open No. 2005-125806), and thereby the subject. Information may be obtained.

<Measuring means>
The optometry device includes measuring means (for example, measuring optical system 200). The measuring means objectively measures the optical characteristics of the eye to be inspected by projecting the measured luminous flux onto the fundus of the eye to be inspected and receiving the reflected light flux reflected by the fundus of the eye to be inspected. As the objective optical characteristics of the eye to be inspected, at least one of the optical power (spherical power, cylindrical power, astigmatic axis angle, etc.), axial length, corneal shape, etc. may be measured.

The measuring means may include a projection optical system (projection optical system 210). The projection optical system projects the measured luminous flux from the light source (for example, the light source 211) onto the fundus of the eye to be inspected. Further, the measuring means may include a light receiving optical system (for example, a light receiving optical system 220). The light receiving optical system receives the fundus reflected light flux reflected by the fundus of the eye to be inspected by a detector (for example, the image sensor 22).

<Cloud fog means>
The optometry device includes cloud fog means (eg, control unit 170). The cloud fog means adds cloud fog to the eye to be inspected. For example, the cloud fog means controls the fixation target presentation means (for example, the fixation target presentation optical system 300) and changes the presentation position of the fixation target (that is, the presentation distance of the fixation target) to be the eye to be inspected. You may add cloud fog to.

In this case, the cloud fog means presents the fixation target formed on the fixation plate by moving the fixation plate (for example, the fixation plate 302) in the optical path of the fixation plate. The position may be changed. Further, in this case, the cloud fog means may change the presentation position of the fixation target formed on the fixation target plate by moving the optical member in the optical path of the fixation target presentation means. Further, in this case, the cloud fog means may change the presentation position of the fixation target formed on the fixation target plate by inserting and removing an optical member in the optical path of the fixation target presentation means. At least one of a lens, a prism, a mirror, and the like can be used as the optical member that is moved or inserted and removed in the optical path of the fixation target presenting means. For example, the cloud fog means adds cloud fog to the eye to be inspected by any or a combination of such configurations.

In the present embodiment, the cloud fog means adds cloud fog to the eye to be inspected based on an arbitrary cloud fog parameter set by the first setting means described later. That is, the cloud fog means controls the fixation target presenting means based on an arbitrary cloud fog parameter set by the first setting means described later, and changes the presentation position of the fixation target to apply cloud fog to the eye to be inspected. Add.

When the cloud fog means is switched to either the first mode for setting the first cloud fog parameter or the second mode for setting the second cloud fog parameter by the switching means described later, the first mode or the second mode is used. Cloud fog may be added to the eye to be inspected based on each cloud fog parameter according to the mode.

<First setting means>
The optometry device includes a first setting means (for example, a control unit 170). The first setting means makes it possible to set arbitrary cloud fog parameters related to cloud fog to be added to the eye to be inspected. By the first setting means, it is possible to change the parameter for each eye to be inspected to a cloud fog parameter in which the adjustment of the eye to be inspected is easily released. For example, in the conventional method of applying a uniform cloud fog parameter to any eye, even when it is difficult to release the adjustment of the eye to be inspected, it is possible to change the cloud fog parameter to an appropriate value according to the eye to be inspected.

For example, the first setting means may set the cloud fog parameter based on the signal input by the operator operating the operation means. Further, for example, the first setting means may set the cloud fog parameter based on the subject information acquired by the subject information acquisition means. In this case, the cloud fog parameter may be set by using a table or the like in which the subject information and the cloud fog parameter are associated with each other. For example, the table may be preset based on the results of experiments and simulations, clinical results, and the like.

For example, the cloud fog parameter added to the eye to be inspected may be a parameter related to an element constituting the cloud fog to be added to the eye to be inspected. That is, it may be a parameter related to an element set from the start to the completion of the addition of cloud fog to the eye to be inspected.

For example, in the first setting means, as cloud fog parameters of the eye to be inspected, the amount of cloud fog added to the eye to be inspected (the amount of cloud fog), the time of cloud fog to be added to the eye to be inspected (cloud fog time), and the velocity of the cloud fog to be added to the eye to be inspected The configuration may be such that parameters including at least one of (cloud fog velocity) can be set. That is, the first setting means may be able to set one parameter of the cloud fog amount, the cloud fog time, and the cloud fog velocity as the cloud fog parameter to be added to the eye to be inspected, or may be able to set a plurality of parameters.

For example, the amount of cloud fog added to the eye to be inspected may be expressed as the presentation position (presentation distance) of the fixation target. In this case, the first setting means may set a cloud fog start position (for example, cloud fog start position d2) at which cloud fog addition is started as a presentation position of the fixation target according to the amount of cloud fog added to the eye to be inspected. .. Further, in this case, the first setting means sets the display position of the fixation target according to the amount of cloud fog applied to the eye to be inspected, as the cloud fog completion position (for example, cloud fog completion position d3a, cloud fog completion position d3b) at which the addition of cloud fog is completed. ) May be set.

As an example, if the configuration is such that the presentation position of the fixation target is changed by moving the fixation plate, the first setting means is to change the arrangement position of the fixation plate to change the position of the fixation plate. At least one of the cloud fog start position and the cloud fog completion position may be set. Further, as an example, if the configuration is such that the presentation position of the fixation target is changed by moving the optical member, the first setting means starts cloud fog on the fixation target plate by changing the arrangement position of the optical member. At least one of the position and the cloud fog completion position may be set. Further, as an example, if the configuration is such that the presentation position of the fixation target is changed by inserting and removing the optical member, the first setting means is the cloud fog start position of the fixation target plate by inserting or removing the optical member. Alternatively, at least one of the cloud fog completion positions may be set. As a result, the moving distance of the fixation plate from the cloud fog start position to the cloud fog completion position is changed. That is, the amount of cloud fog added to the eye to be inspected is changed.

For example, the cloud fog time added to the eye to be inspected may be a time between the timing of starting the addition of cloud fog to the eye to be inspected and the timing of completing the addition of cloud fog to the eye to be inspected. For example, it may be the time required to change the presentation position of the fixation target from the cloud fog start position to the cloud fog completion position. As an example, if the configuration is such that the presentation position of the fixation target is changed by moving the fixation plate, the first setting means sets the movement time for moving the fixation plate from the cloud fog start position to the cloud fog completion position. It may be set. Further, as an example, if the configuration is such that the presentation position of the fixation target is changed by moving or inserting / removing the optical member, the first setting means causes the fixation target plate to become cloudy as the optical member is moved or inserted / removed. You may set the movement time to move from the start position to the cloud fog completion position.

For example, the cloud fog velocity applied to the eye to be inspected may be a velocity at which the cloud fog changes from the timing when the addition of the cloud fog to the eye to be inspected is started to the timing when the addition of the cloud fog to the eye to be inspected is completed. For example, it may be the speed at which the fixation target reaches the cloud fog completion position from the cloud fog start position. As an example, if the configuration is such that the presentation position of the fixation target is changed by moving the fixation plate, the first setting means determines the moving speed at which the fixation plate reaches the cloud fog completion position from the cloud fog start position. It may be set. Further, as an example, if the configuration is such that the presentation position of the fixation target is changed by moving or inserting / removing the optical member, the first setting means causes the fixation target plate to become cloudy as the optical member is moved or inserted / removed. You may set the moving speed to reach the cloud fog completion position from the start position.

In the present embodiment, the first setting means can set the amount of cloud fog to be added to the eye to be inspected as the cloud fog parameter of the eye to be inspected. That is, the first setting means can set an appropriate amount of cloud fog for each eye to be inspected. As a result, for example, in the conventional method of applying a uniform cloud fog parameter to any eye, even if the amount of cloud fog is insufficient and the adjustment of the eye to be inspected cannot be completely released, it is appropriate for the eye to be inspected. It can be changed to a large amount of cloud fog.

Further, for example, in the present embodiment, the first setting means can set at least one of the cloud fog time and the cloud fog velocity in addition to the cloud fog amount added to the eye to be inspected as the cloud fog parameter of the eye to be inspected. That is, the first setting means can set an appropriate amount of cloud fog for each eye to be inspected, and can set an appropriate cloud fog time and cloud fog speed. As a result, for example, in the conventional method of applying a uniform cloud fog parameter to any eye, even if the cloud fog time is insufficient and the eye to be inspected cannot completely release the adjustment, it is appropriate for the eye to be inspected. It can be changed to a cloud fog time. Further, for example, in the conventional method of applying a uniform cloud fog parameter to any eye, even when the cloud fog speed is high and it is difficult to induce the release of the adjustment of the eye to be inspected, it is appropriate for the eye to be inspected. It can be changed to cloud fog speed.

For example, the first setting means may be able to set either the cloud fog time or the cloud fog velocity in addition to the cloud fog amount added to the eye to be inspected. In this case, the first setting means may set the cloud fog amount and the cloud fog time, and automatically calculate and set the cloud fog velocity based on these. Further, in this case, the first setting means may set the cloud fog amount and the cloud fog velocity, and automatically calculate and set the cloud fog time based on these. That is, the first setting means may set either the cloud fog time or the cloud fog velocity by setting either the cloud fog time or the cloud fog velocity in addition to the cloud fog amount added to the eye to be inspected.

Further, for example, the first setting means may be able to set both the cloud fog time and the cloud fog speed in addition to the cloud fog amount added to the eye to be inspected. That is, the first setting means may be able to set all of the cloud fog amount, the cloud fog time, and the cloud fog velocity added to the eye to be inspected. In this case, the first setting means may be predetermined so as to preferentially set either the cloud fog time or the cloud fog velocity.

For example, in the present embodiment, the first setting means is a first cloud fog parameter related to cloud fog added to the eye to be inspected, a second cloud fog parameter related to cloud fog added to the eye to be inspected, and at least a part of the first cloud fog parameter. It may be possible to set a second cloud fog parameter having a different value. That is, the first setting means may be able to set the first cloud fog parameter and the second cloud fog parameter in which at least one of the cloud fog amount, the cloud fog time, and the cloud fog velocity in the cloud fog parameter is different.

The first mode in which the first cloud fog parameter is set by the first setting means may be a pediatric mode applied when the subject is a child. In this case, the amount of cloud fog in the first mode (pediatric mode) may be set to be larger than the amount of cloud fog in the second mode. Further, in this case, the cloud fog time in the first mode (pediatric mode) may be set longer than the cloud fog time in the second mode. Further, in this case, the cloud fog velocity in the first mode (pediatric mode) may be set to be slower than the cloud fog velocity in the second mode. In the pediatric mode, at least one of the cloud fog amount, cloud fog time, and cloud fog velocity parameters may be set in this way.

For example, if the subject is a child, it may be difficult to release the adjustment of the subject's eye by the conventional method of applying a uniform cloud fog parameter to any eye. More specifically, because children are highly accommodative, they may be accommodating more than a given amount of fog, which may not release the accommodation. Therefore, for children, cloud fog can be appropriately added by increasing the amount of cloud fog, lengthening the cloud fog time, or slowing down the cloud fog velocity.

In this embodiment, the pediatric mode may be applied to an eye to be inspected having a high accommodation power. For example, it may be applied to a young person's eye to be examined. As an example, it may be applied to an eye to be examined up to the age of 20s. Further, as an example, it may be applied to an eye to be inspected whose age is 12 years or younger.

<Second setting means>
The optometry device may include a second setting means (eg, control unit 170). The second setting means makes it possible to set a waiting time from the timing when the addition of cloud fog to the eye to be inspected is completed to the timing when the measurement (acquisition) of the optical characteristics of the eye to be inspected is started. The waiting time can be changed for each eye to be inspected by the second setting means. For example, in the conventional method of applying a uniform waiting time to all eyes, even if the optical characteristics are acquired while the eye to be inspected is releasing the adjustment, it is appropriate for the eye to be inspected. It can be changed to a different waiting time.

For example, the second setting means may set the waiting time based on the signal input by the operator operating the operating means. Further, for example, the second setting means may set the waiting time based on the subject information acquired by the subject information acquisition means. In this case, the waiting time may be set by using a table or the like in which the subject information and the waiting time are associated with each other. For example, the table may be preset based on the results of experiments and simulations, clinical results, and the like.

<Acquisition method>
The optometry device includes acquisition means (eg, control unit 170). The acquisition means controls the measuring means and acquires the optical characteristics of the eye to be inspected. In the present embodiment, the acquisition means controls the measuring means and acquires the optical characteristics of the eye to be inspected to which the cloud fog is added by the cloud fog means.

For example, the acquisition means may acquire the optical characteristics of the eye to be inspected at a timing when a predetermined waiting time elapses from the timing when the addition of cloud fog to the eye to be inspected is completed. In this case, even if the predetermined waiting time is determined by obtaining in advance from experiments and simulations the time required from the completion of the addition of cloud fog to the eye to be inspected until the adjustment of the eye to be inspected is released. Good. Further, for example, when the acquisition means has a waiting time set by the second setting means between the timing when the cloud fog is added to the eye to be inspected and the timing when the acquisition of the optical characteristics is started, the waiting time is set. After some time has passed, the optical properties of the eye to be inspected may be acquired.

<Switching means>
The optometry device may include switching means (eg, control unit 170). The switching means switches between a first mode in which the first cloud fog parameter is set by the first setting means and a second mode in which the second cloud fog parameter is set by the first setting means. For example, the switching means may switch between the first mode and the second mode based on the signal input by the operator operating the operating means. Further, for example, the switching means may switch between the first mode and the second mode based on the subject information acquired by the subject information acquisition means.

<Example>
Hereinafter, the optometry device will be described. In this embodiment, the left-right direction of the optometry device is represented by the X direction, the vertical direction is represented by the Y direction, and the front-back direction is represented by the Z direction.

FIG. 1 is an external configuration diagram of the optometry device 100. For example, the optometry device 100 is provided with a base 101, a face support unit 102, a moving base 103, a measuring unit 104, a joystick 105, a driving unit 106, a monitor (display) 107, a switch unit 108, and the like. The face support unit 102 is fixed to the base 101 and supports the face of the subject. The moving table 103 can move in the X direction and the Z direction with respect to the base 101. The moving table 103 is provided with a monitor 107 for displaying various information (for example, an observation image of the eye E to be inspected, a measurement result of the eye E to be inspected, etc.), a switch unit 108 for making various settings, and the like. There is. The measuring unit 104 houses an optical system described later. The drive unit 106 can move in the Y direction with respect to the moving table 103.

The joystick 105 is provided with a moving mechanism that moves the measuring unit 104 relative to the eye E to be inspected. For example, in this embodiment, as such a moving mechanism, a sliding mechanism (not shown) for sliding the moving table 103 on the base 101 in the XZ direction is provided. When the examiner operates the joystick 105, the moving table 103 slides on the base 101 in the XZ direction. Further, the joystick 105 is provided with a rotary knob 105a for moving the drive unit 106 in the Y direction. When the examiner operates the rotary knob 105a of the joystick 105, the drive unit 106 moves in the Y direction, and the measurement unit 104 also moves in the Y direction. As a result, the measuring unit 104 can be moved with respect to the eye E to be inspected.

In the above description, the configuration in which the measuring unit 104 is moved in the Y direction with the movement of the driving unit 106 is given as an example, but the present invention is not limited to this. For example, the measuring unit 104 may be provided with a moving mechanism that enables the measuring unit 104 to move in the X direction, the Y direction, and the Z direction. In such a configuration, the moving mechanism provided in the measuring unit 104 is used when the measuring unit 104 is finely moved with respect to the eye E to be inspected, and the sliding mechanism provided in the moving table 103 is used. It may be used when the measuring unit 104 is coarsely moved with respect to the eye E to be inspected.

FIG. 2 is a schematic configuration diagram of an optical system and a control system of the optometry apparatus 100. For example, the measurement unit 104 includes a measurement optical system 200, a fixation target display optical system 300, an index projection optical system 400, an observation optical system 500, and the like. The measurement optical system 200 objectively measures the optical power of the eye E to be inspected (for example, spherical power, columnar power, astigmatic axis angle, etc.). The fixation target presentation optical system 300 presents the fixation target to the eye E to be inspected. The index projection optical system 400 projects an alignment index for detecting the Z direction of the eye E to be inspected. The observation optical system 500 images the anterior segment of the eye E to be inspected.

<Measurement optical system>
For example, the measurement optical system 200 includes a projection optical system (projection optical system) 210 and a light receiving optical system 220. The projection optical system 210 projects a spot-shaped measurement luminous flux onto the fundus Ef of the eye E to be examined through the central portion of the pupil P in the eye E to be inspected. The light receiving optical system 220 takes out the reflected luminous flux of the measured luminous flux reflected by the fundus Ef in a ring shape through the peripheral portion of the pupil P.

For example, the projection optical system 210 includes a light source 211, a relay lens 212, a hall mirror 213, a prism 214, a drive unit 215, an objective lens 216, and the like. The light source 11 is arranged on the optical axis N1 of the measurement optical system 200 and has a positional relationship optically conjugate with the fundus Ef. For example, as the light source 211, an LED (Light Emitting Diode), an SLD (Superluminescent Diode), or the like can be used. The opening of the hole mirror 213 has a positional relationship optically conjugate with the pupil P. The prism 214 is arranged at a position deviating from the position conjugate with the pupil P, and eccentric the light flux passing through the prism 214 with respect to the optical axis N1. Instead of the prism 214, a parallel flat plate may be diagonally arranged on the optical axis N1. The drive unit 215 rotates the prism 214 around the optical axis N1.

For example, the light receiving optical system 220 includes an objective lens 216, a prism 214, a hole mirror 213, a relay lens 221, a total reflection mirror 222, a light receiving aperture 223, a collimator lens 224, a ring lens 225, an image pickup element 226, and the like. The objective lens 216, the prism 214, and the hall mirror 213 are shared with the projection optical system 210. The relay lens 221 and the total reflection mirror 222 are arranged in the reflection direction of the hall mirror 213. The light receiving diaphragm 223, the collimator lens 224, the ring lens 225, and the image sensor 226 are arranged in the reflection direction of the total reflection mirror 222. The light receiving diaphragm 223 has a positional relationship optically conjugate with the fundus Ef. The ring lens 225 has a positional relationship optically conjugate with the pupil P. For example, the ring lens 225 is composed of a lens portion in which a cylindrical lens is formed in a ring shape, and a light-shielding portion in which a light-shielding coating is applied in addition to the lens portion. The image sensor 226 has a positional relationship optically conjugate with the fundus Ef. For example, as the image sensor 226, a CCD (Charged-Coupled Devices), a CMOS (Complementary Metal-Oxide-Semiconductor), or the like can be used. For example, the output signal from the image sensor 226 is input to the control unit 170 via the image processing unit 171.

A beam splitter 230 is arranged between the eye E to be inspected and the objective lens 216. The beam splitter 230 guides the measured luminous flux from the fixation target display optical system 300 to the eye E to be inspected, and guides the reflected luminous flux from the anterior segment of the eye E to be inspected to the observation optical system 500.

In the above configuration, the measured luminous flux emitted from the light source 211 projects a spot-shaped measured luminous flux on the fundus Ef via the relay lens 212, the hall mirror 213, the prism 214, the objective lens 216, and the beam splitter 230. As a result, a point light source image is formed on the fundus Ef. At this time, the prism 214 is rotated around the optical axis N1, and the pupil projection image (projected luminous flux on the pupil) of the opening of the hall mirror 213 is eccentrically rotated at high speed. The reflected luminous flux reflected by the fundus Ef is reflected on the hall mirror 213 via the beam splitter 230, the objective lens 216, and the prism 214. The reflected light flux is further reflected by the total reflection mirror 222 via the relay lens 221 and collected at the position of the light receiving diaphragm 223. A ring-shaped image is formed on the image sensor 226 by the collimator lens 224 and the ring lens 225.

The measurement optical system 200 is not limited to the above configuration, and includes a light projecting optical system that projects a measured light beam onto the fundus Ef of the eye E to be inspected and a light receiving optical system that receives the reflected light beam of the measured light beam reflected by the fundus Ef. Any measurement optical system having, may be used. For example, the measurement optical system 200 may be a measurement optical system that projects a spot index on the fundus Ef and detects the reflected luminous flux of the spot index on the fundus Ef using a Shack-Hartmann sensor.

<Optical display optical system>
For example, the fixation target display optical system 300 includes a light source 301, a fixation target plate 302, a projection lens 303, a drive unit 304, a half mirror 305, an objective lens 306, a drive unit 307, and the like. The light source 301 is arranged on the optical axis N2 coaxial with the optical axis N1 by the beam splitter 230. The fixation plate 302 includes a first fixation plate 302a and a second fixation plate 302b. The first fixation plate 302a is used when measuring the refractive power of the eye to be inspected E. The second fixation plate 302b is used when measuring the accommodation power of the eye E to be inspected. The drive unit 304 switches between the first fixation plate 302a and the second fixation plate 302b. By moving the position of the fixation target plate 302 in the direction of the optical axis N2, the drive unit 307 can move the presentation position of the fixation target to be presented to the eye E to be inspected. Further, the drive unit 307 can apply cloud fog to the eye E to be inspected by moving the light source 301 and the fixation plate 302 in the direction of the optical axis N2. For example, as the drive unit 307, an actuator (for example, a stepping motor or the like) and a photo interrupter serving as a reference position may be used in combination.

<Index projection optical system>
The index projection optical system 400 includes a first index projection optical system and a second index projection optical system. The first index projection optical system projects an alignment index at infinity onto the cornea of the eye E to be inspected. The second index projection optical system projects a finite distance alignment index onto the cornea of the eye E to be inspected.

For example, the first index projection optical system includes point light sources 401a and 401b, collimator lenses 402a and 402b, and the like. For convenience, FIG. 2 shows only a part of the first index projection optical system. The point light sources 401a and 401b may be light sources that emit near-infrared light. The collimator lenses 402a and 402b convert the luminous flux emitted from the point light source into a parallel luminous flux (substantially parallel luminous flux). A plurality of these point light sources and collimator lenses are arranged on a concentric circle centered on the optical axis N1 at intervals of 45 degrees, and are symmetrical with respect to a vertical plane passing through the optical axis N1. As a result, an alignment index at infinity is projected onto the cornea of the eye E to be inspected.

For example, the second index projection optical system has point light sources 403a and 403b. For convenience, FIG. 2 shows only a part of the second index projection optical system. The point light sources 403a and 403b may be light sources that emit near-infrared light. For example, six of these point light sources are arranged at positions different from the point light sources of the first index projection optical system. As a result, a finite distance alignment index is projected on the eye E to be inspected.

In this embodiment, a configuration in which a point-shaped light source is used as the light source of the first index projection optical system and the second index projection optical system has been described as an example, but the present invention is not limited to this. For example, the light source may be a ring-shaped light source or a line-shaped light source. Further, the second index projection optical system can also be used as an anterior segment illumination for illuminating the anterior segment of the eye E to be inspected, an index for measuring the corneal shape of the eye E to be inspected, and the like.

<Observation optical system>
For example, the observation optical system 500 includes an objective lens 306, a half mirror 305, an image pickup lens 501, an image pickup element 502, and the like. The objective lens 306 and the half mirror 305 are shared with the fixation target display optical system 300. The image pickup lens 501 and the image pickup element 502 are arranged in the reflection direction of the half mirror 305. The image sensor 502 has an optically conjugate positional relationship with the anterior segment of the eye E to be inspected. For example, the output from the image sensor 502 is input to the control unit 170 and the monitor 107 via the image processing unit 172. The observation optical system 500 also serves as an optical system for detecting an alignment index image formed on the cornea of the eye E to be inspected by the index projection optical system 400, and the position of the alignment index image is detected by the image processing unit 172 and the control unit 170. To do.

<Control unit>
For example, the control unit 170 includes a CPU (processor), RAM, ROM, and the like. The CPU controls the drive of each part of the optometry device 100. The RAM temporarily stores various types of information. Various programs and the like executed by the CPU are stored in the ROM. The control unit 170 may be composed of a plurality of control units (that is, a plurality of processors).

A drive unit 106, a monitor 107, a switch unit 108, an image processing unit 172, a non-volatile memory 175 (hereinafter, memory 175), and the like are electrically connected to the control unit 170. Further, each light source, each image sensor, each drive unit, and the like included in the measurement unit 104 are electrically connected to the control unit 170.

The memory 175 is a non-transient storage medium capable of retaining the stored contents even when the power supply is cut off. For example, as the memory 175, a hard disk drive, a flash ROM, a USB memory, or the like can be used. The memory 175 may store cloud fog parameters, the refractive power of the eye to be inspected E, and the like, which will be described later.

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

The optometry device 100 in this embodiment can switch the addition of cloud fog to the optometry E to two modes, a normal mode and a pediatric mode. For example, the normal mode is a conventional mode in which a uniform cloud fog parameter is applied to all eyes. For example, the pediatric mode is a mode in which cloud fog parameters suitable for the pediatric eye are applied. The cloud fog parameter in the normal mode and the cloud fog parameter in the pediatric mode may be stored in the memory 175 in advance.

<Normal mode>
Hereinafter, the implementation of the objective measurement in which the normal mode is selected will be described.

First, the measurement unit 104 is aligned with the eye E to be inspected. The examiner instructs the subject to place his / her face on the face support unit 102. In addition, the examiner operates the switch unit 108 to select a measurement mode for measuring the refractive power of the eye to be inspected E. The control unit 170 drives the drive unit 304 included in the fixation target display optical system 300 in response to the input signal from the switch unit 108 to switch the fixation plate 302 to the first fixation plate 302a. The luminous flux from the light source 301 is projected onto the eye E to be inspected through the first fixation plate 302a, so that the fixation target formed on the first fixation plate 302a is projected in front of the eye E. Presented.

Subsequently, the examiner operates the switch unit 108 to select a switch for starting the alignment between the eye E to be inspected and the measurement unit 104. The control unit 170 projects an alignment index image by the index projection optical system 400 onto the cornea of the eye E to be inspected in response to an input signal from the switch unit 108. Further, the control unit 170 detects the deviation of the measurement unit 104 in the X direction, the Y direction, and the Z direction with respect to the eye E to be inspected by using the alignment index image, and moves the measurement unit 104 based on the deviation. This completes the alignment.

When the alignment with respect to the eye E to be inspected is completed, a mode for adding cloud fog to the eye E to be inspected is set. The examiner operates the switch unit 108 to select the normal mode. The control unit 170 calls and sets the cloud fog parameter of the normal mode for the eye E to be inspected from the memory 175 in response to the input signal from the switch unit 108. For example, the control unit 170 sets a predetermined cloud fog amount Δd1, a predetermined cloud fog time Δt1, and a predetermined cloud fog velocity.

When the setting of the normal mode is completed, the objective measurement for the eye to be inspected is started. The examiner operates the switch unit 108 and selects a switch for starting the objective measurement. The control unit 170 performs preliminary measurement of the objective value for the eye to be inspected E in response to the input signal from the switch unit 108, and then carries out the main measurement of the objective value for the eye to be inspected.

FIG. 3 is a graph showing the presentation position and the elapsed time of the first fixation plate 302a in the objective measurement. The vertical axis represents the presentation position of the first fixation plate 302a, and indicates that the position is closer as the distance from the intersection of the vertical axis and the horizontal axis increases. The horizontal axis is the elapsed time, and the farther away from the intersection of the vertical axis and the horizontal axis, the more time has passed. In FIG. 3, as the refractive power of the eye E to be inspected, the change Sn of the spherical refractive power in the eye E to be inspected and the true value St of the refractive power of the spherical refraction in the eye E to be inspected (in other words, the adjustment of the eye E to be inspected is released). Spherical refraction frequency in the state) and is shown together. Further, FIG. 3 shows a case where the eye E to be inspected has myopia and the preliminary measurement is started in a state where the adjustment is further applied.

The control unit 170 starts the preliminary measurement in response to the input signal from the switch unit 108 (elapsed time t0). The control unit 170 arranges the first fixation plate 302a at the initial position d1 which is optically sufficient distance from the eye E to be inspected and corresponds to 0D. For example, when the eye E to be inspected is a myopic eye, the focus of the eye E to be inspected does not match the first fixation plate 302a, and the fixation target is observed blurry. Further, the control unit 170 irradiates the measured luminous flux from the light source 211, and causes the image pickup device 226 to image the reflected luminous flux of the measured luminous flux as a ring image. For example, the control unit 170 thins the ring image to obtain the optical refractive power in each meridian direction, performs a predetermined process on the optical refractive power, and performs the spherical refractive power of the eye E to be inspected (spherical refractive power in the preliminary measurement). Acquire S1). The control unit 170 ends the preliminary measurement (elapsed time t1).

Subsequently, the control unit 170 moves the first fixation plate 302a to the cloud fog start position d2 where the eye E is focused according to the spherical refractive power S1 of the preliminary measurement of the eye E (elapsed time t2). ). As a result, the fixation target is clearly observed in the eye E to be inspected.

The spherical refractive power S1 of the preliminary measurement of the eye E to be inspected may be the result obtained in a state where the adjustment is applied to the eye E to be inspected. That is, the spherical refractive power S1 in the preliminary measurement of the eye E to be inspected may be the result obtained in a state where the eye E to be inspected changes the thickness of the crystalline lens (that is, the refractive power of the crystalline lens). Therefore, the control unit 170 adds cloud fog to the eye E to be inspected and releases the adjustment of the eye E to be inspected.

The control unit 170 starts adding cloud fog to the eye E to be inspected (elapsed time t3). The control unit 170 moves the first fixation plate 302a to the cloud fog completion position d3a corresponding to the predetermined cloud fog amount Δd1. At this time, the first fixation plate 302a is moved from the cloud fog start position d2 to the cloud fog completion position d3a at a predetermined cloud fog velocity (inclination of the line segment AB) requiring a predetermined cloud fog time Δt1. When the first fixation plate 302a reaches the cloud fog completion position d3a, the addition of the cloud fog to the eye E to be inspected is completed (elapsed time t4).

As a result, cloud fog is added to the eye E to be inspected, and the focus of the eye E to be inspected is not aligned with the first fixation plate 302a again. For example, as indicated by the change Sn of the spherical refraction power of the eye E to be inspected, the spherical refraction power of the eye E to be inspected approaches a predetermined true value St from the spherical refraction power S1 obtained in the preliminary measurement, and the eye E to be inspected E. Is gradually released.

The control unit 170 starts this measurement with cloud fog added to the eye E to be inspected. For example, the control unit 170 captures and analyzes a ring image at predetermined timing intervals, and acquires the spherical refractive power of the eye E to be inspected (spherical refractive power S2 in this measurement). Of course, both the cylindrical refraction power and the astigmatic axis angle of the eye E to be inspected may be acquired. The control unit 170 stores the spherical refractive power S2 (and the cylindrical refractive power, astigmatic axis angle, etc.) of the present measurement in the memory 175 and displays it on the monitor 107.

<Pediatric mode>
When the above normal mode is selected, cloud fog is added to the eye E to be inspected based on a uniform cloud fog parameter. However, depending on the eye to be inspected, the adjustment may not be released by adding cloud fog based on uniform parameters. In particular, the eyes of children are highly accommodative, and if they are adjusted more than the set amount of cloud fog, the accommodation may remain unadjusted. If the main measurement is started before the adjustment of the eye E to be inspected is completely released, the refractive power of the eye E to be inspected cannot be correctly obtained.

In this embodiment, by switching the addition of cloud fog to the eye E to be inspected to the pediatric mode, it is possible to apply an appropriate cloud fog parameter according to the pediatric eye and make it easy to release the adjustment. For example, the cloud fog parameters in the pediatric mode are preset from the results of experiments and simulations, clinical results, and the like, and are stored in the memory 175. This makes it possible to correctly obtain the refractive power in the eyes of children.

Hereinafter, the implementation of objective measurement in which the pediatric mode is selected will be described.

The examiner completes the alignment of the measuring unit 104 with respect to the eye E to be inspected, and operates the switch unit 108 to select the pediatric mode. For example, the control unit 170 calls the cloud fog parameter of the pediatric mode for the eye E to be inspected from the memory 175 in response to the input signal from the switch unit 108, and displays it on the monitor 107. For example, the control unit 170 displays the standard cloud fog amount Δd2, the standard cloud fog time Δt2, and the standard cloud fog velocity in the pediatric mode on the monitor 107.

FIG. 4 is an example of the display screen 40 of the monitor 107. For example, on the display screen 40, there is a cloud fog amount change button 41 that can change the standard cloud fog amount Δd2 for the eye E, a cloud fog time change button 42 that can change the standard cloud fog time Δt2 for the eye E, and the eye E. A cloud fog speed change button 43 capable of changing a standard cloud fog velocity, a confirmation button 44 for confirming a cloud fog parameter, and the like may be provided.

For example, the standard cloud fog amount Δd2 in the pediatric mode may be set to a larger value than the cloud fog amount Δd1 in the normal mode. As a result, the moving distance of the first fixation plate 302a becomes longer, so that the cloud fog completion position d3b corresponding to the cloud fog amount Δd2 in the pediatric mode is covered more than the cloud fog completion position d3a corresponding to the cloud fog amount Δd1 in the normal mode. Move away from optometry E. That is, in the eye E to be inspected, the fixation target is observed more blurry in the pediatric mode than in the normal mode.

Further, for example, the standard cloud fog time Δt2 in the pediatric mode may be set to a larger value than the cloud fog time Δt1 in the normal mode. As a result, it takes more time in the pediatric mode than in the normal mode from the start to the end of the addition of the cloud fog to the eye E to be inspected (that is, the elapsed time t3 to the elapsed time t4).

Further, for example, the standard cloud fog velocity in the pediatric mode may be set to a smaller value than the cloud fog velocity in the normal mode. As a result, the cloud fog velocity from the cloud fog start position d2 to the cloud fog completion position d3b of the first fixation plate 302a becomes slower in the pediatric mode than in the normal mode.

For example, the examiner confirms the display screen 40 and operates the confirmation button 44 to determine the standard cloud fog amount, the standard cloud fog time, and the standard cloud fog velocity for the eye E to be inspected. For example, the control unit 170 sets the cloud fog amount Δd2, the cloud fog time Δt2, and the cloud fog speed according to the input signal from the confirmation button 44. The examiner operates the cloud fog amount change button 41, the cloud fog time change button 42, and the cloud fog speed change button 43, and at least one of the standard cloud fog amount, the standard cloud fog time, and the standard cloud fog speed for the eye E to be inspected. The value can be changed to any value.

When the examiner determines the cloud fog amount Δd2, the cloud fog time Δt2, and the cloud fog velocity for the eye E to be inspected, the examiner starts objective measurement (preliminary measurement and main measurement) for the eye E to be inspected. When the first fixation plate 302a is arranged at the initial position d1 corresponding to 0D, the control unit 170 starts the preliminary measurement (elapsed time t0) and acquires the spherical refractive power S1 in the preliminary measurement of the eye E to be inspected. Further, the control unit 170 moves the first fixation plate 302a to the cloud fog start position d2 according to the spherical refractive power S1 of the preliminary measurement of the eye E to be inspected, and starts adding the cloud fog to the eye E to be inspected ( Elapsed time t3).

FIG. 5 is a diagram showing a change Sn of the spherical refraction power when the normal mode is applied to the eye E to be inspected. FIG. 5A shows a state in which the adjustment amount of the eye E to be examined is larger than the amount Δd1 of the cloud fog immediately before the start of the cloud fog with respect to the eye E to be inspected. FIG. 5B shows a state in which the adjustment amount of the eye E to be inspected is about the same as the amount of fog Δd1 immediately before the start of the cloud fog on the eye E to be inspected. Here, when the normal mode is applied to the eyes of a child, the control unit 170 uses the first fixation plate 302a to reach the cloud fog completion position d3a corresponding to the cloud fog amount Δd1, and the cloud fog requires a cloud fog time Δt1. It is moved at a speed (inclination of the line segment AB) to complete the addition of cloud fog to the eye E to be inspected (elapsed time t4).

For example, at this time, as shown in FIG. 5A, if the adjustment amount of the eye E to be inspected is larger than the cloud fog amount Δd1, the main measurement for the eye E to be inspected is started with the adjustment of the eye E to be inspected remaining. Sometimes (elapsed time t5). That is, when the absolute value of the difference between the spherical refractive index S1 of the eye to be inspected E and the true value St is larger than the cloud fog amount Δd1, the spherical refractive index of the eye to be inspected E does not reach the true value St, and the book with respect to the eye to be inspected E. The measurement may be started (elapsed time t5). In this case, the spherical refractive power S2 of the main measurement of the eye E to be inspected is not correctly acquired.

Further, for example, at this time, as shown in FIG. 5B, even if the adjustment amount of the eye E to be inspected is about the same as the amount of cloud fog Δd1, the adjustment of the eye E to be inspected is not completely released, and the book for the eye E to be inspected is not completely released. The measurement may be started (elapsed time t5). Also in this case, the spherical refraction power of the eye E to be inspected does not reach the true value St, and the spherical refraction power S2 of the main measurement of the eye E to be inspected is not correctly acquired.

FIG. 6 is a diagram showing a change Sn of the spherical refractive power when the pediatric mode is applied to the eye E to be inspected. Immediately before the start of cloud fog with respect to the eye E to be inspected, the adjustment amount of the eye E to be inspected is less than the cloud fog amount Δd2. On the other hand, when the pediatric mode is applied to the pediatric eye, the control unit 170 moves the first fixation plate 302a up to the cloud fog completion position d3b corresponding to the cloud fog amount Δd2 appropriately set for the child. , The cloud fog velocity (slope of the line segment AB) requiring the cloud fog time Δt2 is moved to complete the addition of the cloud fog to the eye E to be inspected (elapsed time t4).

For example, at this time, the accommodation of the eye E to be inspected is gradually released, and after the spherical refractive power of the eye E to be inspected reaches the true value St (elapsed time tun), the main measurement for the eye E to be inspected is started (elapsed time). Time t5). In this case, the spherical refractive power S2 of the main measurement of the eye E to be inspected can be correctly obtained. The control unit 170 stores the spherical refraction power S2 (and the cylindrical refraction power, the astigmatic axis angle, etc.) in the main measurement of the eye E to be inspected in the memory 175 and displays it on the monitor 107.

As described above, for example, the eye examination device in the present embodiment can set an arbitrary cloud fog parameter related to the cloud fog to be added to the eye to be inspected, and can add the cloud fog to the eye to be inspected based on the arbitrary cloud fog parameter. .. Therefore, even for an eye to be inspected whose adjustment cannot be released by applying a uniform cloud fog parameter as in the conventional case, the adjustment can be easily released by appropriately setting the cloud fog parameter. Therefore, the correct optical characteristics of the eye to be inspected can be obtained.

Further, for example, the eye examination device in this embodiment can set the amount of cloud fog to be added to the eye to be inspected as a cloud fog parameter related to the cloud fog of the eye to be inspected. As a result, even for an eye to be inspected whose adjustment cannot be completely released by applying a uniform cloud fog parameter as in the conventional case, the adjustment can be easily released by appropriately setting the cloud fog amount. That is, the amount of cloud fog can be changed for each eye to be inspected, and an appropriate cloud fog can be added to the eye to be inspected.

Further, for example, in the eye examination device of the present embodiment, as a cloud fog parameter related to cloud fog of the eye to be inspected, in addition to the amount of cloud fog to be added to the eye to be inspected, the addition of cloud fog is completed after the addition of cloud fog to the eye to be inspected is started. It is possible to set at least one of the cloud fog time up to and the speed from the start of cloud fog addition to the eye to be inspected until the cloud fog addition is completed. For example, since the cloud fog time required for canceling the adjustment differs depending on the eye to be inspected, the cloud fog time may be insufficient with a uniform cloud fog parameter. Further, for example, since the cloud fog velocity at which the release of adjustment is likely to be induced differs depending on the eye to be inspected, the cloud fog velocity may be inappropriate with a uniform cloud fog parameter. However, by appropriately setting the cloud fog time and the cloud fog velocity, it is possible to reduce the start of measurement of the optical characteristics even though the eye to be inspected has not released the adjustment.

Further, for example, the optometry apparatus in this embodiment can switch between a first mode for setting a first cloud fog parameter and a second mode for setting a second cloud fog parameter which is at least partially different from the first parameter. Yes, set the cloud fog parameters according to the switched mode. For this reason, for example, it corresponds to both an eye to be inspected whose adjustment is canceled by setting a uniform cloud fog parameter and an eye to be inspected whose adjustment is easily canceled by setting an arbitrary cloud fog parameter. can do. Appropriate modes can be applied according to the eye to be inspected, and the correct optical characteristics of the eye to be inspected can be obtained.

Further, for example, in the optometry apparatus in this embodiment, the first mode for setting the first cloud fog parameter is set as a mode to be applied to children, and at least the amount of cloud fog in the first mode is increased more than the amount of cloud fog in the second mode. .. In particular, since children have high accommodation power, they may adjust more than the amount of cloud fog set by the conventional uniform cloud fog parameter, and in this case, the adjustment is not released. Therefore, as in this embodiment, for children, cloud fog is appropriately added by increasing the amount of cloud fog, lengthening the cloud fog time, or slowing down the cloud fog velocity. And it can be easier to release the adjustment.

<Example of transformation>
In this embodiment, a configuration in which a cloud fog parameter suitable for a child's eye is stored in a memory 175 in advance and called for setting is described as an example, but the present invention is not limited to this. For example, the inspector may input an arbitrary cloud fog parameter to set the cloud fog parameter. Further, for example, the examiner may input the examinee information to automatically set the cloud fog parameter based on the examinee information. For example, the subject information may be at least one of the age of the subject, the accommodation range of the eye to be examined, the accommodation power of the eye to be examined, whether or not an intraocular lens is inserted in the eye to be examined, and the like. .. As a result, it is possible to easily set an appropriate parameter that is easy to release the adjustment for each eye to be inspected.

In this embodiment, a configuration for setting an arbitrary cloud fog parameter related to the cloud fog of the eye E to be inspected has been described as an example, but the present invention is not limited to this. For example, the waiting time from the completion of the addition of cloud fog to the eye E to be examined to the start of measurement (acquisition) of the optical characteristics of the eye E may be set to an arbitrary waiting time. That is, the waiting time (elapsed time t4 to elapsed time t5) from when the first fixation plate 302a reaches the cloud fog completion position (cloud fog completion position d3a or cloud fog completion position d3b) until the main measurement is started is arbitrary. It may be configured to be set to the waiting time of. As a result, even for an eye to be inspected whose adjustment cannot be released in time by setting a uniform waiting time as in the conventional case, by setting the waiting time appropriately, the optical characteristics can be obtained while the adjustment is being released. It is possible to prevent the measurement of the above from being started.

In this embodiment, the measurement of the refractive power of the eye E to be inspected is started (that is, the main measurement is started) after a predetermined waiting time has elapsed after the addition of the cloud fog to the eye E to be inspected is completed. Has been described as an example, but the present invention is not limited to this. In this embodiment, the measurement of the refractive power of the eye E to be inspected may be started while the cloud fog is being added to the eye E to be inspected. For example, in this case, the measurement of the refractive power of the eye E may be started at the same time (substantially) when the addition of the cloud fog to the eye E is started. Further, for example, in this case, the measurement of the refractive power of the eye E to be inspected may be started after a predetermined time (for example, 1 second later, etc.) has elapsed from the start of adding cloud fog to the eye E to be inspected. ..

For example, since the adjustment of the eye E to be inspected is gradually released after the cloud fog is added, the refractive power of the eye E to be inspected is measured and monitored while the cloud fog is added to the eye E to be inspected, and the measurement result fluctuates. May be detected. For example, the fluctuation of the measurement result is at least one of the standard deviation of a plurality of measurement results within a unit time, the difference between the maximum value and the minimum value of a plurality of measurement results within a unit time, the frequency of the fluctuating measurement result, and the like. Can be adopted. In this case, the control unit 170 determines the timing when the fluctuation of the measurement result becomes equal to or less than a predetermined threshold value as the timing when the adjustment of the eye E to be inspected is released, and the measurement result after this timing is the refractive power of the main measurement. May be obtained as. That is, the time (see FIG. 3) from the elapsed time t4 when the addition of cloud fog to the eye E to be inspected is completed to the elapsed time t5 when the main measurement is started may be set based on the fluctuation of the measurement result.

The optometry device of this embodiment has a configuration in which one of the left eye and the right eye in the eye E to be inspected is measured and then the other is measured. At least a part of the technique illustrated in the above can be applied. For example, the optometry device may be a device capable of measuring the optical characteristics of the optometry E while the front of the optometry E is open. That is, the optometry device projects the measured light beam onto the fundus of both the left eye and the right eye of the optometry eye, and receives the fundus reflection light beam of both the left eye and the right eye to obtain the optical characteristics of the optometry eye. It may be an optometry apparatus having a measuring means for objectively measuring in an open state. In this case, the optometry device sets cloud fog parameters for both the left eye and the right eye, adds cloud fog based on the cloud fog parameters to both the left eye and the right eye, and leaves and right eyes open. The optical properties of the eye may be acquired.

104 Measuring unit 107 Monitor 170 Control unit 175 Memory 200 Measuring optical system 300 Fixed-point display optical system 400 Index projection optical system 500 Observation optical system

Claims (9)

An optometry device having a measuring means for objectively measuring the optical characteristics of the eye to be inspected by projecting a measured light beam onto the fundus of the eye to be inspected and receiving the reflected light beam reflected by the fundus of the eye. There,
A first setting means capable of setting an arbitrary cloud fog parameter related to the cloud fog added to the eye to be inspected, and
A cloud fog means that adds the cloud fog to the eye to be inspected based on the arbitrary cloud fog parameter set by the first setting means.
An acquisition means that controls the measuring means and acquires the optical characteristics of the eye to be inspected to which the cloud fog is added by the cloud fog means.
An optometry device comprising. In the optometry device of claim 1,
The first setting means is an optometry apparatus characterized in that the amount of the cloud fog to be added to the eye to be inspected can be set as the cloud fog parameter. In the optometry apparatus of claim 2,
Further, as the cloud fog parameter, the first setting means includes a cloud fog time, a cloud fog velocity, and a cloud fog time between the timing of starting the addition of the cloud fog to the eye to be inspected and the timing of completing the addition of the cloud fog. An optometry device characterized in that at least one of the above can be set. In any of the optometry devices of claims 1 to 3,
A second setting means capable of setting a waiting time between the timing when the cloud fog is added to the eye to be inspected and the timing when the acquisition of the optical characteristics is started is provided.
The optometry apparatus is characterized in that the acquisition means acquires the optical characteristics of the eye to be inspected to which the cloud fog is added by the cloud fog means after the waiting time has elapsed. In the optometry apparatus according to any one of claims 1 to 4.
Equipped with a subject information acquisition means for acquiring subject information regarding the subject,
The first setting means is an optometry device characterized in that the cloud fog parameter is set based on the subject information. In the optometry apparatus according to any one of claims 1 to 5.
The first setting means can set a first cloud fog parameter and a second cloud fog parameter that is at least partially different from the first cloud fog parameter.
A switching means for switching between a first mode in which the first cloud fog parameter is set by the first setting means and a second mode in which the second cloud fog parameter is set by the first setting means is provided.
The optometry means is an optometry device that adds the cloud fog to the eye to be inspected based on the cloud fog parameters according to the mode switched by the switching means. In the optometry apparatus of claim 6,
The first mode is a pediatric mode applied to pediatrics.
An optometry apparatus characterized in that at least the amount of cloud fog in the pediatric mode is set to be larger than the amount of cloud fog in the second mode. In the optometry device of claim 6 or 7.
An optometry apparatus characterized in that at least the cloud fog time in the pediatric mode is set longer than the cloud fog time in the second mode. In the optometry apparatus according to any one of claims 6 to 8.
An optometry apparatus characterized in that at least the cloud fog velocity in the pediatric mode is set to be slower than the cloud fog velocity in the second mode.

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