JP2002119476A - Optometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optometer making a customer oneself to easily understand the alignment that is a key point for measuring the optometry. SOLUTION: This optometer is provided with an automatic alignment mechanism automatically aligning optometry measuring units 16L and 16R for the eyes to be examined, a manual alignment means 12 manually aligning the optometry measurement units 16L and 16R for the optometry by the subject 4 oneself, and a determination means 64 determining whether the automatic alignment is executable or not.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optometry apparatus which allows a subject to easily perform alignment when performing optometry measurement by himself / herself.

[0002]

2. Description of the Related Art Conventionally, there has been known an optometric apparatus having an alignment mechanism for automatically aligning a main body of the apparatus with an eye to be examined.

[0003] In this type of optometry apparatus, a skilled examiner manually operates the optometry apparatus to drive the apparatus main body to a range in which automatic alignment can be performed with respect to an eye to be inspected, and perform automatic alignment on the apparatus main body. It is configured to be executed.

[0004] However, recently, from the viewpoint of management efficiency and cost reduction, the number of eyeglass shops aiming to make service staff unmanned and reduce the number of staff is increasing, and as a part of this, optometry is performed on the examinee himself. Attempts are being made to try it.

[0005]

However, even if the examinee can know the names of the components of the optometric apparatus and the outline of the operation method, the examinee usually does not understand this type of optometric apparatus. It is completely unskilled and unfamiliar, and it is considered that it is often the case that the subject stumbles at the stage of alignment of the subject's eye with the apparatus main body as a prerequisite for measurement.

In particular, in the automatic alignment, the range in which the automatic alignment can be performed on the eye to be inspected is severe. For example, the amount of deviation of the optical axis of the apparatus main body from the visual axis of the eye to be inspected is not within 4 mm in the vertical and horizontal directions. The automatic alignment is not performed, and even if the examiner needs skill, the examinee is completely layman, so how to perform this alignment smoothly is the subject's optometric measurement. It is a key point to make yourself do it.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is an optometric apparatus capable of allowing an examinee to easily know an alignment which is a key point for performing optometric measurement. The purpose is to provide.

[0008]

According to a first aspect of the present invention, there is provided an optometry apparatus for automatically executing alignment of an optometry unit with respect to an eye to be examined and a optometry unit for the optometry unit with respect to the eye to be examined. It is characterized by having manual alignment means for manually performing alignment and determination means for determining whether or not automatic alignment is executable.

According to a second aspect of the present invention, there is provided the optometry apparatus, wherein when the automatic alignment is determined to be executable, there is provided an informing means for informing the subject that the automatic alignment is executable. Features.

In the optometry apparatus according to the third aspect, when it is determined that the automatic alignment cannot be performed, it is not possible to perform the automatic alignment, and it is necessary to perform the rough alignment by manual operation. A transmission means for transmitting to the examiner is provided.

According to a fourth aspect of the present invention, when it is determined that automatic alignment can be executed based on the manual alignment of the optometric measurement unit with respect to the subject's eye,
It is characterized in that there is provided an informing means for informing the examinee that the automatic alignment can be executed from a state where automatic alignment cannot be executed to a state where automatic alignment can be executed.

According to a fifth aspect of the present invention, in the optometry apparatus, the determining means is a sensing sensor provided on a forehead rest or a chin rest or a start button for starting a determination as to whether or not automatic alignment can be performed. It is characterized by.

An optometric apparatus according to a sixth aspect of the present invention is characterized in that the optometry apparatus is provided with an informing means for explaining to an examinee what the automatic alignment is like.

In the optometry apparatus according to the present invention, when the subject has a customer card, the alignment information is stored in the customer card, and the alignment information stored in the customer card is stored in the card reader. The optometry unit is set to the initial position based on the alignment information.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an optometry table whose height can be adjusted up and down, 2 denotes an eye refractive power measuring device disposed on the optometry table 1, 3 denotes an optometry chair, and 4 denotes an object seated on the optometry chair 3. The examiner.

As shown in FIGS. 1 to 7, the eye refractive power measuring device 2 comprises a box body 5 formed in an inverted L-shape from an upright portion 5a and an upper horizontal portion 5b, and the upright portion 5a. Flat support portions 6 and 7 are provided integrally on both left and right sides of the front surface and extend toward the front. Further, the eye refractive power measuring device 2
Has cursor keys (cursor buttons) 8, 9, 10, 11 provided on the left flat support portion 6, and a joystick lever 12 provided on the right flat support portion 7. A photographing switch 12a is provided at the upper end of the joystick lever 12.
Is provided.

Further, the eye-refractive-power measuring device 2 includes a horizontal portion 5a.
Stay 1 attached to the lower surface of the central part of
3, a support shaft 14 protruding from the stay 13, and a support shaft 1
4 has an arc-shaped forehead 15 attached thereto, and a left-eye refractive power measurement unit (inspection unit) 16L and a right-eye refractive power measurement unit (inspection unit) 16R arranged on the left and right sides of the forehead 15, respectively.

The eye refractive power measuring units 16L, 16R
Are supported by the horizontal portion 5a by supporting means 17L and 17R which can be driven in three-dimensional directions. This support means 1
7L is a three-dimensional driving device (three-dimensional driving mechanism) 18L provided in the horizontal portion 5a and a horizontal rotating device (horizontal rotating driving device) provided below the three-dimensional driving device 18L which is a three-dimensional driving means. ) 19L. The support means 17R includes a three-dimensional driving device (three-dimensional driving mechanism) 18R disposed in the horizontal portion 5a and a horizontal rotating device (lower than the three-dimensional driving device 18R that is a three-dimensional driving device). (Horizontal rotation driving device) 19R. <Three-dimensional driving device> Three-dimensional driving device (three-dimensional driving means)
Reference numerals 18L and 18R denote a Y (vertical) driving device (driving means) 20 for vertically driving the support shaft 20a using a pulse motor, a hydraulic cylinder, or the like, and a Y (vertical) mounted on the lower end of the support shaft 20a. ) Directional movement support member 21 and Y
A Z (front-back) movement support member 22 attached to the direction movement support member 21 so as to be movable in the Z (front-back) direction, and an X (movable) attached to the Z-direction movement support member 22 in the X (left-right) direction. (Left and right) direction support member 23.

As shown in FIG. 8, the Z-direction moving support member 22 is a Z-direction driving device (driving means) 24 such as a pulse motor attached to the Y-direction moving supporting member 21.
And a feed screw 25 rotated and driven by a Z-direction drive unit 24 to drive the Z-axis drive unit 24 to move forward and backward in the Z (front-back) direction. The X-direction moving support member 23 is driven by a left-right driving device (driving means) 26 such as a pulse motor attached to the Z-direction moving support member 22 and a feed screw 27 rotationally driven by the pulse motor 26 so that X (right and left) is controlled. ) Direction. <Horizontal rotating device> Also, a horizontal rotating device (horizontal rotating means)
19L and 19R are Xs of the three-dimensional driving devices 18L and 18R.
Horizontal rotation driving devices (convergence driving means) 28, 28, such as pulse motors, fixed at the centers of the moving support members 23, 23
And rotating shafts 29, 29 driven to rotate about vertical axes by pulse motors 28, 28, respectively. The left eye refractive power measurement unit 16L and the right eye refractive power measurement unit 16R are fixed to the rotation shafts 29, 29. <Eye Refractive Power Measurement Unit as Optometry Unit> The left eye refractive power measurement unit 16L and the right eye refractive power measurement unit 16R have substantially the same configuration except for omitting some of them. The measurement optical system of the unit 16L will be described. (A) Measurement optical system of left eye refractive power measurement unit 16L and its control system The measurement optical system of left eye refractive power measurement unit 16L is an anterior eye part imaging optical system 30L shown in FIGS. 9, 10 and 11.
XY alignment optical system 31L and fixation optical system 32
L and a refractive power measuring optical system 33L. The measurement optical system of the right eye refractive power measurement unit 16R is shown in FIGS.
As shown in FIG. 13, the anterior ocular segment imaging optical system 30R and the XY
It has an alignment optical system 31R, a fixation optical system 32R, and a refractive power measuring optical system 33R. (Anterior segment imaging optical system 30L) Anterior segment imaging optical system 30L
Has an anterior segment illumination optical system 34 and a photographing optical system 35.

The anterior segment illumination optical system 34 has a light source 36 for illuminating the anterior segment, an aperture 36a, and a projection lens 37 for projecting light from the light source 36 to the anterior segment of the eye E to be examined.

The photographing optical system 35 includes a prism P on which reflected light from the anterior segment of the subject's eye E enters, and an objective lens 3.
8, dichroic mirror 39, diaphragm 40, dichroic mirror 41, relay lenses 42, 43, dichroic mirror 44, CCD lens (imaging lens) 45, C
A CD (imaging means) 46 is provided in this order. (XY alignment optical system 31L) The XY alignment optical system 31L has an alignment illumination optical system 47 and a photographing optical system 35 as an alignment light receiving optical system. As shown in FIG. 10, the alignment illumination optical system 47 includes an illumination light source 48 for alignment, a diaphragm 49 as an alignment target, a relay lens 50, a dichroic mirror 41, a diaphragm 40, a dichroic mirror 39, an objective lens 38, and a prism. P in this order. (Fixation Optical System 32L) The fixation optical system 32L includes a liquid crystal display (display means) 53 for displaying a fixation target, a chart for subjective optometry, a reflection mirror 54, a collimator lens 55,
Reflection mirror 56, moving lens 57, relay lens 58,
59, reflection mirror 60, dichroic mirror 61, 3
9, an objective lens 38 and a prism P in this order.

In the fixation target optical system 32L, the moving lens 57 can be moved in the optical axis direction by a pulse motor PMa in accordance with the refractive power of the eye to be examined, so that the fixation cloud can be formed. (Refractive power measuring optical system 33L) Refractive power measuring optical system 33L
Are the measuring beam projection optical system 62 and the measuring beam receiving optical system 6
3

The measurement light beam projection optical system 62 includes a measurement light source 64 such as an infrared LED, a collimator lens 65, a conical prism 66, a ring target 67, a relay lens 68, a ring stop 69, and a through hole 70a formed in the center. It has a perforated prism 70, dichroic mirrors 61 and 39, an objective lens 38 and a prism P in this order.

The measuring light beam receiving optical system 63 includes a prism P for receiving light reflected from the fundus oculi Ef of the eye E, an objective lens 38, dichroic mirrors 39 and 61, a through hole 70a of a perforated prism 70, and a reflecting mirror. 71, a relay lens 72, a moving lens 73, a reflection mirror 74, a dichroic mirror 44, a CCD lens 45, and a CCD 46 in this order.

The measuring optical system of the right-eye refractive power measuring unit 16R is exactly the same as the measuring optical system of the left-eye refractive power measuring unit 16L, and a description thereof will be omitted. (Control Circuit of Left Eye Refractive Power Measuring Unit 16L) The above-described driving devices 20, 24, 26, 28, the light source 36 for observing the anterior segment, the light source 51 for the fixation target, the light source 64 for measurement, the pulse motor PMa, and the like are The operation is controlled by the arithmetic and control circuit 62 shown in FIG. The arithmetic control circuit 62 receives a detection signal from the CCD. (B) Measurement optical system and control system of right eye refractive power measurement unit 16R The right eye refractive power measurement unit 16R has the same configuration as the left eye refractive power measurement unit 16L as described above. <Overall Control Circuit> As shown in FIG. 14, the overall control circuit includes the above-described control circuits 62, 62 of the eye refractive power measurement units 16L, 16R and an arithmetic control circuit 63 for controlling the control circuits 62, 62. Have. The arithmetic control circuit 63 includes:
A tilt detection sensor 12 that detects a tilt operation of the photographing switch 12a and the joystick lever 12 to the front, rear, left and right.
b, a rotation sensor 12c for detecting a rotation operation of the joystick lever 12 about an axis is connected. Also,
A display device (display means) 64 such as a liquid crystal display is connected to the arithmetic control circuit 63. This liquid crystal display 64
It is arranged and used on the front side of the box body 5 as shown in FIG.

Next, the state of use of the eye refractive power inspection apparatus having such a configuration will be described. (1) Adjusting the height of the eye refractive power measurement unit, etc. The subject 4 is seated on the chair 3 as shown in FIG. 1, and the height of the prisms P, P of the eye refractive power measurement units 16L, 16R is The height of the optometry table 1 is adjusted up and down by a vertical driving unit (not shown) so that the eye height becomes the height of the eye. A well-known vertical drive mechanism for the optometry table 1 can be employed, and a detailed description thereof will be omitted. (2) Alignment to Left and Right Eyes in Far Vision State Next, when the subject 4 turns on the power supply of the eye refractive power measurement device 2 (not shown), the operation procedure is sequentially displayed on the arithmetic control circuit display device 64. . The subject 4 proceeds with the optometry according to the procedure.

At this time, the arithmetic control circuit 63 includes the arithmetic control circuit 62 of the eye refractive power measurement units 16L and 16R.
The operation of 62 is controlled to start preparation for an alignment operation for the left eye EL and the right eye ER of the subject 4. That is, each operation control circuit 6 of the eye refractive power measurement units 16L and 16R
Reference numerals 2 and 62 denote anterior segment observation light sources 36 of the eye refractive power measurement units 16L and 16R, illumination light sources 48 for alignment,
The fixation target light source 51 is turned on.

The eye refractive power measuring units 16L, 16L
The R operation control circuits 62, 62 control the operation of the horizontal rotation driving devices 28, 28 based on the control signal from the operation control circuit 63, and the test is performed from the prisms P, P of the eye refractive power measurement units 16L, 16R. The optical axes OL and OR toward the user 4 are made parallel as shown in FIGS.

In such a state, when the subject 4 measures the eye refractive power of the left and right eyes, the subject 4 makes the forehead abut the forehead 15 before the measurement, and the subject 4 The optical axes of the left and right eyes 4 are prisms P, P of the eye refractive power measurement units 16L, 16R.
The XY alignment is performed by moving the eye refractive power measurement units 16L and 16R right and left and up and down so as to come to the center position (optical axis OL and OR) of the eye. (i) Alignment of left eye refractive power measurement unit with left eye EL (a) X of left refractive power measurement unit 16L with respect to left eye EL
At this time, the arithmetic control circuit 63 performs the XY alignment.
Are set so that the XY alignment of the left eye refractive power measurement unit 16L is performed first. That is, the arithmetic control circuit 63 first controls the driving devices 20 and 26 (part of the automatic alignment mechanism) of the left eye refractive power measurement unit 16L so that they can be driven by the joystick lever 12.
At this time, the illumination light from the light source 36 for illuminating the anterior segment of the eye refractive power measurement unit 16L is transmitted through the stop 36a and the projection lens 3
7, the illumination light from the light source 36 for illuminating the anterior segment of the eye refracting power measurement unit 16R is projected onto the anterior segment of the eye EL via the diaphragm 36a and the projection lens 37.
Is projected on the anterior segment of the eye.

The reflected light from the anterior segment of the left eye EL is reflected by the prism P, objective lens 38, dichroic mirror 39, diaphragm 40, dichroic mirror 41, relay lenses 42 and 43, dichroic mirror 44, CCD
CCD (imaging means) via lens (imaging lens) 45
46, and an anterior eye image EL 'of the left eye EL is formed on the CCD 46 as shown in FIG. The arithmetic control circuit 62
Anterior eye image E of left eye EL based on output signal from CCD 46
L ′ is displayed on the liquid crystal display 53 as shown in FIG.

On the other hand, an illumination light source 48 for XY alignment
Of the alignment light beam from the lens, an aperture 49 as an alignment target, a relay lens 50, a dichroic mirror 4
1. Cornea CL of left eye EL of subject via aperture 40, dichroic mirror 39, objective lens 38, and prism P
Is projected on. The reflected light from the cornea CL is
Prism P, objective lens 38, dichroic mirror 3
9, a CCD (imaging means) 46 via an aperture 40, a dichroic mirror 41, relay lenses 42 and 43, a dichroic mirror 44, and a CCD lens (imaging lens) 45
The bright spot image EP from the cornea CL is formed on the CCD 46 as shown in FIG. Moreover, the arithmetic control circuit 62
18 shows a bright spot image EP together with an anterior eye image EL 'of the left eye EL based on an output signal from the CCD 46 as shown in FIG.
3 is displayed. Here, CR is the cornea of the right eye EL of the subject.

In this state, the left eye EL of the subject 4 is brought into contact with the forehead 15 by the anterior eye image EL of the liquid crystal display 53 of the eye refractive power measurement unit 16L with the subject 4 in contact with the forehead 15. ′ And the bright spot image EP, the bright spot image EP, which is the center of the pupil of the left eye EL, is automatically moved in the horizontal direction with respect to the center OLa of the liquid crystal display 53 (coincident with the center O of the CCD 46, ie, the optical axis OL). When the joystick lever 12 is tilted left and right so as to fall within a predetermined range in which alignment is possible, the tilt sensor 1
2b, the X (left / right) direction driving device 26 is driven to rotate forward or backward, and the left eye refractive power measuring unit 16L is driven.
Is controlled to move left and right.

When the joystick lever 12 is operated to rotate one side around the axis or the other side, the arithmetic control circuit 63 drives the Y (up / down) direction driving device 20 to rotate forward or reverse, and The left eye refractive power measurement unit 16L is controlled to move up and down. Therefore, while the subject 4 visually recognizes the anterior eye image and the bright spot image EP of the liquid crystal display 53 of the eye refractive power measurement unit 16L, the bright spot image EP, which is the center of the pupil of the left eye EL, is displayed on the liquid crystal display. The joystick lever 12 is rotated around the axis so as to be within a predetermined range where automatic alignment in the vertical direction can be performed with respect to the center of 53 (coincident with the center of the CCD 46, that is, the optical axis OL). The moving operation is performed such that the optical axis of the left eye (eye to be inspected) EL coincides with the center (optical axis OL) of the prism P of the left eye refractive power measurement unit 16L. The center (optical axis OL) of the prism P is
6 coincides with the center.

In this manner, the bright spot image EP of the left eye EL of the subject 4 is displayed on the liquid crystal display 5 of the left eye refractive power measurement unit 16L.
When the center OLa is within a predetermined range S1 with respect to the center OLa, the bright spot image EP by the alignment light beam is within a predetermined range of the center O of the CCD 46.

The operation control circuit 63 is provided with a CCD 46
When the signal of the bright spot image from the camera enters a predetermined range of the center of the CCD 46, the optical axis of the left eye of the subject 4 coincides with the center (optical axis OL) of the prism P of the left eye refractive power measurement unit 16L. The driving of the driving devices 20 and 26 is controlled in the directions. Along with such driving, the arithmetic control circuit 63 sets the allowable range in which the optical axis of the left eye of the subject 4 coincides with or substantially coincides with the center (optical axis OL) of the prism P of the left eye refractive power measurement unit 16L. When it enters S2 (measurable range), the operation of the driving devices 20 and 26 is stopped, and the XY alignment of the left eye refractive power measurement unit 16L with respect to the left eye EL is completed. (b). Z-direction alignment of the left eye refractive power measurement unit 16L with respect to the left eye EL The arithmetic and control circuit 63 completes the XY alignment of the left eye refractive power measurement unit 16L with the left eye EL after completing the CC.
Z (before and after) so that the bright spot image of D46 becomes clear to some extent
The driving of the direction driving device 24 is controlled to move the left eye refractive power measurement unit 16L in the optical axis OL direction (front-back direction). When the arithmetic control circuit 63 detects from the output signal of the CCD 46 that the bright spot image of the CCD 46 has become clear to some extent, the arithmetic control circuit 63 determines that Z alignment has been completed and stops driving the Z (front-back) direction driving device 24. . (ii). Alignment with right eye refractive power measurement unit 16R In this manner, the arithmetic and control circuit 63 performs XY alignment and Z alignment with the left eye EL of the left eye refractive power measurement unit 16L.
When the alignment is completed, the right eye refractive power measurement unit 1
The XY alignment and the Z alignment for the 6R right eye ER are performed in the same manner as the left eye refractive power measurement unit 16L.

As described above, when aligning the optical axis of the optometric measurement unit with respect to the subject, the subject 4 tilts the joystick lever 12 to perform the predetermined range S1,
That is, the optical axis of the optometry unit (apparatus main body) is set in the range S1 in which the auto alignment is performed. However, the configuration is not limited to this, and the configuration described below can be adopted. <Another configuration of alignment> Here, the arithmetic control circuit 6
2 has a judgment means for judging whether or not automatic alignment can be executed. That is, the arithmetic control circuit 62 is first made to determine whether or not the apparatus main body is in a range where the automatic alignment can be performed in a state where the subject 4 applies the forehead to the forehead support 15.

For example, a sensing sensor 15 'for detecting that the forehead hits the forehead 15 is provided as means for starting the determination of whether or not automatic alignment is possible in the arithmetic and control circuit 62. Instead of providing a sensing sensor on the forehead pad 15, a sensing sensor may be provided on a chin rest (not shown), or a start button for causing the arithmetic and control circuit 62 to start determination may be provided.

In this optometry apparatus, when the arithmetic and control circuit 62 determines that automatic alignment can be performed, the automatic alignment is performed as it is. When it is determined that automatic alignment cannot be performed, as shown in FIG. The message "Auto alignment cannot be performed.
Operate the joystick lever 12 so that the bright spot EP falls within the predetermined range S1. Is displayed in characters.

Instead of displaying this message in characters on the liquid crystal display 53, the message may be transmitted to the subject by voice.

The subject 4 operates the joystick lever (manual alignment means) 12 or the cursor keys 8 to 11 to put the bright spot image EP in the predetermined range S1, thereby enabling automatic alignment. Sometimes, the liquid crystal display 53
The message "Auto-alignment can be executed. Stop operating the joystick lever 12" is displayed in characters.

When the spectacle lens 24 is worn,
Since the optometric measurement is performed with the spectacle lens 24 removed, a diopter correction lens is provided between the liquid crystal display 53 and the reflection mirror 54 using the measurement data of the spectacle lens measuring device (not shown). It is preferable to insert a character (not shown) and adjust the diopter so that the characters on the liquid crystal display 53 are clearly recognized.

Instead of using the characters, the message may be transmitted to the subject by voice, or the type of the fixation target may be changed so that the subject can be informed. Furthermore,
Change the fixation target brightness so that it is dark when it is not within the range where automatic alignment is feasible and brighten when it is within the range where automatic alignment is feasible, or change the color of the fixation target from yellow to white. May be made to be known.

It is desirable that the center distance L1 between the centers of the prisms P, P of the optometry units 16L, 16R (see FIG. 3) be reset to, for example, the average interpupillary distance of the subject's adult before starting the measurement.

As described above, if the positions of the optometry units 16L and 16R are set at the average interpupillary distance of the subject, automatic alignment can be performed when the subject applies his forehead to the forehead rest 15. It is desirable to increase the probability.

Before the start of the measurement, an explanation screen showing what state the monitor screen of the arithmetic and control circuit 62 was in when automatic alignment could not be executed and in what state the automatic alignment could be executed was displayed. May be presented to the subject to make the subject aware.

Further, an explanation screen for explaining what operation must be performed by the subject may be displayed.

Furthermore, the subject may be informed in advance by a moving image with narration about how the alignment is performed.

Note that the subject is a customer card (not shown).
If the customer possesses the information, the alignment information is stored in the customer card, and the alignment information stored in the customer card is read by a card reader (not shown), and the optometry measurement is performed based on the alignment information. It is also possible to set the units 16L and 16R at the initial position.

When the frame PD measured by the spectacle lens measuring device (lens meter) can be used, the optometry unit 16L, 16R is set to the initial position using the frame PD. Is also good.

When the frame PD cannot be used, the optometry unit 16L and the optometry unit 16L are input according to the age by inputting the age from children to adults.
6R may be set to change the initial position.

The height of the vertical alignment is also
The initial positions of the optometry units 16L and 16R may be changed according to the age.

Further, instead of displaying the anterior eye image obtained by the CCD 46 on the liquid crystal display 53, as shown in FIG. 21, a ring index 98 as a movement index indicating the position of the eye to be examined.
Is operated on the liquid crystal display 53, and the joystick lever 12 is operated so that the rough alignment is performed by operating the joystick lever 12 such that the red house 99 presented on the liquid crystal display 53 as a fixation target is surrounded by the ring index 98. May be performed. (3) Simultaneous measurement of eye refractive power in far vision state By the way, the moving lens 57 of the fixation optical system 32L is driven forward and backward in the direction in which the optical axis O extends by a pulse motor (drive means) PMa. . Moreover, the liquid crystal display 5
3 is an initial position before measurement, that is, a refractive power measuring optical system 33.
It is located at a position where the eye refractive power measured by L and 33R is 0D (“0” diopter). The fixation optical system 32R has the same configuration.

The operation control circuit 63 calculates (1),
When the alignment of (2) is completed, the arithmetic control circuit 62 of the refractive power measuring optical system 33L and the refractive power measuring optical system 33R
Of the left and right refractive power measuring optical systems 33L, 33R by controlling the operation of the arithmetic control circuit 62, respectively.
Are turned on to emit infrared measurement light beams from the measurement light sources 64, 64, and measurement of the eye refractive power of the left eye EL and the right eye ER of the subject 4 is started simultaneously. At this time, since the measurement is performed in the same manner for the left eye EL and the right eye ER, the measurement of the left eye EL will be described, and the description of the measurement of the right eye will be omitted. (i) Measurement of the eye refractive power of the left eye EL At this time, the light of the fixation target displayed on the liquid crystal display 53 is reflected by the reflection mirror 54, the collimator lens 55, and the reflection mirror 5.
6. The moving lens 57, the relay lenses 58 and 59, the reflecting mirror 60, the dichroic mirrors 61 and 39, the objective lens 38, and the prism P are projected onto the fundus Ef of the left eye EL of the subject 4.

The measurement light beam from the measurement light source 64 of the left refractive power measurement optical system 33L is projected onto the fundus oculi Ef of the left eye EL of the subject 4 via the measurement light beam projection optical system 62. That is, the measurement light beam from the measurement light source 64 of the left refractive power measurement optical system 33L is guided to the ring target 67 via the collimator lens 65 and the conical prism 66 of the left refractive power measurement optical system 33L. Then, the ring-shaped measurement light beam transmitted through the ring target 67 is transmitted to the relay lens 68, the ring-shaped aperture 69,
The light is projected onto the fundus oculi Ef of the left eye EL of the subject 4 via the perforated prism 70 having a through hole 70a formed in the center, the dichroic mirrors 61 and 39, the objective lens 38 and the prism P.

On the other hand, a ring-shaped measurement light beam (ring-shaped target light) projected on the fundus oculi Ef of the left eye EL is reflected by the fundus oculi Ef. The reflected light is reflected by the measuring light beam receiving optical system 63, that is, the prism P of the refractive power measuring optical system 33L, the objective lens 38,
Dichroic mirrors 39, 61, perforated prism 70
A ring-shaped reflection image is formed on the CCD 46 through the through hole 70a, the reflection mirror 71, the relay lens 72, the moving lens 73, the reflection mirror 74, the dichroic mirror 44, the CCD lens 45, and the like.

The detection signal from the CCD 46 is input to the arithmetic control circuit 62 of the left refractive power measuring optical system 33L. When the detection signal from the CCD 46 is input, the arithmetic control circuit 62 determines the size of the ring-shaped reflection image formed on the CCD 46 and the size and shape of the reference ring-shaped reflection image to obtain the left eye EL. Measure the eye refractive power. At this time, the left eye EL
Because it is not known whether or not the accommodation power is working,
Since accommodation power may be acting on the left eye EL, when the eye refractive power obtained by the refraction measurement is, for example, 3D, 1.5.
D is added and the pulse motor PMa is drive-controlled to move the moving lens 57 forward and backward in the direction in which the optical axis O extends so that the liquid crystal display 53 on which the fixation target is displayed at the position of 4.5D. .

Then, at this position, the eye refractive power of the left eye EL is measured as described above. The measurement result at this time is, for example, 4
At the time of D, the difference between the eye refractive power 3D obtained in the previous measurement and the eye refractive power 4D obtained in the current measurement is 1D, so that it can be seen that the left eye EL has accommodation power. Therefore,
The arithmetic and control circuit 63 adds 1D to the 4D obtained in this measurement.
5D is added to 5.5D to drive the moving lens 57 forward and backward in the direction in which the optical axis O extends by controlling the driving of the pulse motor PMa so that the liquid crystal display 53 comes to the position of 5.5D. The liquid crystal display 53 is fogged to the position of 4.5D, and the eye refractive power of the left eye EL is measured again.

Further, when the measurement result is 4.25D, for example, the difference between the eye refractive power 4D obtained in the previous measurement and the eye refractive power 4.25D obtained in the current measurement is 0.25D. Therefore, it can be considered that the adjustment power of the left eye EL is substantially lost.

That is, as described above, the rough measurement is sequentially repeated, and the difference between the eye refractive power obtained by the previous measurement and the eye refractive power obtained by the current measurement is, for example, 0.25D.
When almost disappears, it can be considered that the adjustment force of the left eye EL has almost disappeared. In addition, when the liquid crystal display 53 is at the position of 4.25D, the left eye EL is in a state where the liquid crystal display 53 can be clearly recognized. Cloud start position.

Then, the arithmetic and control circuit 62 determines that the final eye refractive power based on the rough measurement is 1.5D to a value of 4.25D.
Is added to 5.75D, and the liquid crystal display 53 is fogged by moving the moving lens 57 in the optical axis direction so that the liquid crystal display 53 comes to the position of 5.75D from the position of 4.25D. And perform this measurement. That is, the arithmetic control circuit 62 drives and controls the pulse motor PMa to move the moving lens 57 in the direction in which the optical axis O extends, so that the liquid crystal display 53 comes to the position 5.25D from the position 4.25D. Then, the liquid crystal display 53 visually recognized by the left eye EL is made to fog to a blurred position, and the eye refractive power of the left eye EL is measured by the left refractive power measuring optical system 33L. This measurement of the eye refraction with fog is performed several times, and the average value is used as the eye refraction of the left eye EL. (ii) Measurement of the eye refractive power of the right eye ER The eye refractive power of the right eye ER is measured simultaneously with the left eye EL in the same procedure as the measurement of the eye refractive power of the left eye EL in (i). (iii) Therefore, by simultaneously measuring the eye refractive powers of the left eye EL and the right eye ER in this manner, the left eye EL and the right eye ER are compared with the case where the eye refractive power of each eye is measured one by one. The eye refractive power of the left eye EL and the right eye ER can be accurately measured with less accommodation power of the right eye ER and the right eye ER.

That is, when the eye refractive powers of the left eye EL and the right eye ER are measured one by one, the accommodation power of the unmeasured eye of the left eye EL and the right eye ER is measured. It may affect the accommodation power of the eye. However, the left eye EL and the right eye E
By simultaneously measuring the eye refractive power of R, the accommodation power of the left eye EL and the right eye ER does not influence each other, so that the accommodation power of the left eye EL and the right eye ER is less,
The eye refractive power of the left eye EL and the right eye ER can be accurately measured. (4). Simultaneous measurement of eye refractive power after moving from inward vision (convergence) state to far vision state As described in (3) above, at the time of simultaneous measurement of eye refractive power of left and right eyes in far vision state, Although there is almost no accommodation power of the left and right eyes, after moving from the inward vision state (the state where the optical axes OL and OR are congested) to the far vision state (the state where the optical axes OL and OR are parallel). By simultaneously measuring the eye refractive power, the accommodative power of the left and right eyes can be further reduced, and more accurate eye refractive power measurement can be performed.

In this measurement, first, the left eye EL shown in FIG.
And the right eye ER from a far vision state (a state where the optical axes OL and OR are parallel) to an inward vision (a state where the optical axes OL and OR are congested)
State. For example, when the left eye EL and the right eye ER in FIG. 9 are in the far vision state (the optical axes OL and OR are parallel), the subject 4
Of the left eye EL and the right eye ER are looking forward by about 75 cm, and the left eye EL and the right eye ER are in a state of convergence. (i). Measurement of eye refractive power when the optical axes OL and OR are brought into an equilibrium state from the initial convergence state <Convergence to the initial position>
Operates and controls the driving devices 28, 28 of the eye refractive power measurement units 16L, 16R via the arithmetic control circuits 62, 62, and drives the eye refractive power measurement units 16L, 16R from the state of FIG. 16 and FIG.
As shown in FIG. 7, the optical axes OL and OR are converged so as to have an angle α.

At this time, the arithmetic and control circuit 62 of the eye-refractive-power measuring unit 16L determines the CC of the eye-refractive-power measuring unit 16L.
Based on the address and contrast of the bright spot image for alignment from D46, the operation of the driving devices 24 and 26 of the eye refractive power measurement unit 16L is controlled so that the working distance to the left eye EL of the eye refractive power measurement unit 16L is constant. Is controlled so that On the other hand, the arithmetic control circuit 62 of the eye-refractive-power measuring unit 16R includes the CCD 4 of the eye-refractive-power measuring unit 16R.
The operation of the driving units 24 and 26 of the eye-refractive-power measuring unit 16R is controlled based on the address of the bright spot image for alignment from Step 6 and the contrast, and the like.
Control is performed so that the working distance to the right eye ER of 6R is constant.

When the liquid crystal displays 53 of the eye refractive power measuring units 16L and 16R are located at the convergence position of the angle α, it is assumed that this position corresponds to, for example, -8D. <From the initial convergence state to the optical axes OL and OR being in the equilibrium state> From this convergence state, the arithmetic control circuit 63 controls the eye refractive power measurement units 16L and 16R to operate the arithmetic control circuits 62 and 62, and the arithmetic control circuit 62, 62, the pulse motor P
Ma and PMa are simultaneously driven to control the moving lens 57.
Is moved in the optical axis O direction, and the eye refractive power measurement unit 16 is moved.
L, 16R liquid crystal display 53, 53 to -8D 1.5D
Cloudy to the position -6.5D where

At this time, the arithmetic control circuit 63 controls the operation of the arithmetic control circuits 62, 62 so that the arithmetic control circuits 62, 62
Drives the driving devices 28 and 28 of the eye refractive power measurement units 16L and 16R, thereby controlling the eye refractive power measurement units 16L and 16R.
L and 16R are horizontally rotated in the directions of arrows B and B in FIG. The driving devices 28 by the arithmetic control circuits 62, 62,
Drive control of the eye refractive power measurement units 16L, 16L
The operation is performed until the optical axes OL and OR of R are parallel.

Further, in such drive control, the arithmetic and control circuit 62 of the eye refractive power measuring unit 16L determines the eye refractive power based on the address and contrast of the bright spot image for alignment from the CCD 46 of the eye refractive power measuring unit 16L. The operation of the driving devices 24 and 26 of the force measurement unit 16L is controlled so that the working distance of the eye refractive power measurement unit 16L to the left eye EL is constant. On the other hand, the arithmetic control circuit 62 of the eye-refractive-power measuring unit 16R determines the driving devices 24 and 26 of the eye-refractive-power measuring unit 16R from the address of the bright spot image for alignment from the CCD 46 of the eye-refractive power measuring unit 16R and the contrast. Is controlled so that the working distance of the eye refractive power measurement unit 16R to the right eye ER is constant. <Rough measurement of eye refractive power> Then, the arithmetic and control circuit 62 of the eye refractive power measurement unit 16L includes the driving device 24,
The drive axes 26 and 28 make the optical axes OL and OR parallel, and the drive control of the pulse motor PMa causes the moving lens 57 to move in the optical axis direction. When the cloud is made to reach the position, the measurement light source 64 of the refractive power measurement optical system 33L is turned on to perform a rough measurement of the eye refractive power of the left eye EL.

At the same time, the arithmetic and control circuit 62 of the eye-refractive-power measuring unit 16R includes the driving devices 24, 26,
The optical axes OL and OR are made parallel by the drive control of 28, and the movable lens 57 is moved in the optical axis direction by the drive control of the pulse motor PMa.
When the cloud is made to fog to the position of 6.5D, the measurement light source 64 of the refractive power measurement optical system 33R is turned on, and the left eye EL is turned on.
A rough (coarse) measurement of the eye refractive power of.

In such a measurement, assuming that the value of the refractive power of the left eye EL is, for example, -6D and the value of the refractive power of the right eye ER is, for example, -5D, this value is determined by the left and right eyes EL, E
R may also be the value when there is accommodation. (ii) Measurement of the optical axes OL and OR moving from the convergence state to the equilibrium state at the measured value position <Congestion at the measured value position>
9 individually controls the driving devices 28, 28 of the eye refractive power measurement units 16L, 16R via the arithmetic and control circuits 62, 62 to control the eye refractive power measurement units 16L, 16R.
From the state shown in FIG.
In FIG. 16B, the optical axes OL, OR
Are independently converged, the moving lens 57 of the eye-refractive-power measuring unit 16L is moved in the optical axis direction, and the liquid crystal display 53 is positioned at the position -6D in FIG. The liquid crystal display 53 of FIG.
Position D. <From the convergence state to the optical axes OL and OR being in the equilibrium state> From this convergence state, the arithmetic control circuit 62 of the left eye refractive power measurement unit 16L drives and controls the pulse motor PMa of the left eye refractive power measurement unit 16L, The moving lens 57 is moved in the direction of the optical axis O, and the liquid crystal display 53 of the eye-refractive-power measuring unit 16L is clouded to a position of -4.5D obtained by adding 1.5D to -6D. On the other hand, the right eye refractive power measurement unit 16R
The arithmetic control circuit 62 of the left eye refractive power measurement unit 16R
Of the moving lens 57
Is moved in the optical axis O direction, and the eye refractive power measurement unit 16R
Of the liquid crystal display 53 of -5D plus 1.5D-
Fog to 3.5D position.

At this time, the arithmetic and control circuit 63 controls the operation of the arithmetic and control circuits 62 and 62 so that the arithmetic and control circuits 62 and 62 operate.
Drives the driving devices 28 and 28 of the eye refractive power measurement units 16L and 16R, thereby controlling the eye refractive power measurement units 16L and 16R.
L and 16R are horizontally rotated in the directions of arrows B and B in FIG. The driving devices 28 by the arithmetic control circuits 62, 62,
Drive control of the eye refractive power measurement units 16L, 16L
The operation is performed until the optical axes OL and OR of R are parallel. In addition, at this time, as described above, each arithmetic and control circuit 62 controls the operation of the driving devices 24 and 26 so that the working distances of the eye refractive power measurement units 16L and 16R to the left eye EL and the right eye ER are respectively constant. Control so that <Rough measurement of eye refractive power> The arithmetic control circuit 62 of the eye refractive power measurement unit 16L determines that the optical axes OL and OR are parallel and that the moving lens 57 is moved in the optical axis direction by drive control of the pulse motor PMa. When it is moved and the liquid crystal display 53 is fogged to the position of -4.5D, the measurement light source 64 of the refractive power measurement optical system 33L is turned on,
A rough measurement of the eye refractive power of the left eye EL is performed.

At the same time, the arithmetic and control circuit 62 of the eye-refractive-power measuring unit 16R determines that the optical axes OL and OR are parallel and the movable lens 57 is moved in the optical axis direction by the drive control of the pulse motor PMa. The liquid crystal display 53 is
When the cloud is formed to the position of 3.5D, the measurement light source 64 of the refractive power measurement optical system 33R is turned on, and the left eye EL is turned on.
A rough (coarse) measurement of the eye refractive power of.

In such a measurement, assuming that the value of the refractive power of the left eye EL is, for example, -4D and the value of the refractive power of the right eye ER is, for example, -3D, this value is determined by the left and right eyes EL, E
R may also be the value when there is accommodation. (iii). Repeated Rough Measurement In this case, in the left eye EL, the value of the previously measured eye refractive power is −6D, and the value of the currently measured eye refractive power is −4D.
Since it is D, the difference between the eye refractive power of the previous time and the eye refractive power of the present time greatly increases to -2D, and accommodation power is working. Also, the right eye ER
In, the value of the eye refractive power measured last time is -5D, and the value of the eye refractive power measured this time is -3D.
Adjustment is working.

Therefore, in this case, as shown in FIG. 16B, the optical axes OL,
OR is independently converged, and the eye refractive power measurement unit 16L
Is moved in the direction of the optical axis, the liquid crystal display 53 is positioned at the position of -4D in FIG. 16A, and the moving lens 57 of the eye refractive power measurement unit 16R is moved in the direction of the optical axis. Then, the liquid crystal display 53 is positioned at the position of -3D in FIG.

From the convergence state, as shown in (ii), the moving lens 57 of the eye refractive power measurement unit 16L is moved in the optical axis direction, and the liquid crystal display 53 is obtained by adding 1.5D to -4D. By fogging up to the position of 2.5D, rough measurement of the eye refractive power of the left eye EL is performed, and the moving lens 57 of the eye refractive power measuring unit 16R is moved in the optical axis direction, thereby obtaining the liquid crystal display. 53 is clouded to a position of -1.5D obtained by adding 1.5D to -3D, and a rough measurement of the eye refractive power of the right eye ER is performed.

In such a measurement, assuming that the value of the refractive power of the left eye EL is, for example, -3D and the value of the refractive power of the right eye ER is, for example, -1D, this value is determined by the left and right eyes EL, E
R may also be the value when there is accommodation.

In this case, in the left eye EL, since the value of the eye refractive power measured last time is -4D and the value of the eye refractive power measured this time is -3D, the difference between the previous and current eye refractive powers is obtained. Are widely open at -1D, and the adjusting force is working. In the right eye ER, the value of the previously measured eye refractive power is -3D, and the value of the currently measured eye refractive power is -1D, so that the difference between the previous and present eye refractive powers is -2D. It's wide open and it's adjusted.

Therefore, in this case, as shown in FIG. 16B, as shown in FIG.
OR is independently converged, and the eye refractive power measurement unit 16L
Is moved in the optical axis direction, the liquid crystal display 53 is moved to the position of -3D in FIG. 16A, and the moving lens 57 of the eye refractive power measurement unit 16R is moved in the optical axis direction. Then, the liquid crystal display 53 is moved to the position of -1D in FIG.

From this convergence state, as shown in (ii), the moving lens 57 of the eye refractive power measuring unit 16L is moved in the optical axis direction, and the liquid crystal display 53 is obtained by adding 1.5D to -3D. By fogging to a position of 1.5D, rough measurement of the eye refractive power of the left eye EL is performed, and the moving lens 57 of the eye refractive power measurement unit 16R is moved in the optical axis direction to obtain a liquid crystal display. 53 is clouded to a position of 0.5D obtained by adding 1.5D to -1D, and a rough measurement of the eye refractive power of the right eye ER is performed.

In such a measurement, if the value of the refractive power of the left eye EL is, for example, -2.75 D, the left eye EL
Since the value of the previously measured eye refractive power is −3D, the difference between the previous and present eye refractive powers is substantially the same as −0.25D, and the accommodation power is hardly applied. In such a measurement, the value of the refractive power of the right eye ER is, for example, −
If it is 0.75D, the value of the last measured eye refractive power of the right eye ER is -1D, so that the difference between the previous and current eye refractive powers is substantially the same as -0.25. The force is hardly working. (iV). Main measurement Therefore, in this case, the optical axis O
L and OR are independently converged, and the eye refractive power measurement unit 1
The moving lens 57 of 6L is moved in the direction of the optical axis to position the liquid crystal display 53 at the position of -2.75D in FIG. 16A, and the moving lens 57 of the eye refraction measuring unit 16R is moved in the direction of the optical axis. The liquid crystal display 53 is moved to a position of -0.75D in FIG.

From the convergence state, as shown in (ii), the moving lens 57 of the eye refractive power measuring unit 16L is moved in the optical axis direction, and the liquid crystal display 53 is moved to -2.75D by 1.5D.
Fog to the position of -1.25D, plus the main measurement of the eye refractive power of the left eye EL, and the moving lens 57 of the eye refractive power measurement unit 16R is moved in the optical axis direction to obtain a liquid crystal display. 53 is clouded to a position of 0.75D obtained by adding 1.5D to -0.75, and the main measurement of the eye refractive power of the right eye ER is performed. (5) Others In the embodiment described above, the joystick lever 12 is used to drive the eye refractive power measurement units 16L and 16R.
Although drive control is performed for 24, 26, etc., the present invention is not necessarily limited to this.

For example, the Y-direction driving device 20 is not provided, and only the driving devices 24 and 26 are operated to operate the cursor key 9 to control the driving device 24 to rotate in the normal direction, so that the eye refractive power measurement unit 16L (16R ) To the back,
By operating the cursor key 11, the driving device 24 is reversely driven and controlled, and the eye refractive power measurement unit 16L (16R) is operated.
Is moved forward, and by operating the cursor key 8, the driving device 26 is controlled to rotate in the normal direction to move the eye refractive power measurement unit 16L (16R) to the left.
By operating the cursor key 10, the driving device 26 is reversely driven and controlled, and the eye refractive power measurement unit 16L (16R) is operated.
May be moved to the right. In this case, the height in the Y direction (vertical direction) is adjusted by adjusting the height of the table 1 or the height of the chair 3.

In the above-described embodiment, the distance between the eye refractive power measurement units 16L and 16R is manually driven so as to be the interpupillary distance. However, the interpupillary distance of the subject can be determined. Is not necessarily limited to only this configuration. For example, in addition to this configuration, if the interpupillary distance of the subject is known, or if there is this data, the interpupillary distance or the data is input to the arithmetic and control circuit 63 and the eye refractive power measurement is performed. The interval between the optical axes OL and OR of the units 16L and 16R may be set and controlled to the pupil distance. That is, the arithmetic control circuit 63
When the data of the interpupillary distance of the subject is input, the arithmetic and control circuits 62, 62 of the eye refractive power measurement units 16L, 16R
The operation control of the driving unit 62 and the driving devices 26 and 2 of the eye refractive power measurement units 16L and 16R
6 and controls the eye refractive power measurement units 16L and 16R.
May be set and controlled so that the interval when the optical axes OL and OR are parallel to each other becomes the interpupillary distance of the subject.

[0083]

According to the present invention, it is possible to make the subject easily know the alignment which is a key point for making the optometry measurement.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an arrangement example of an eye refractive power measuring device according to the present invention.

FIG. 2 is an enlarged perspective view of the eye refractive power measuring device shown in FIG.

FIG. 3 is a front view of the eye-refractive-power measuring apparatus of FIG. 2;

FIG. 4 is a plan view of the eye-refractive-power measuring apparatus of FIG.

FIG. 5 is a left side view of the eye refractive power measuring device of FIG.

FIG. 6 is a right side view of the eye refractive power measuring device of FIG. 3;

FIG. 7 is a sectional view showing a support structure of the eye-refractive-power measuring unit shown in FIG. 2;

8 is an explanatory diagram of the support structure shown in FIG. 7 as viewed from below.

FIG. 9 is an explanatory diagram showing an optical system of the eye refractive power measurement unit shown in FIG.

FIG. 10 is an enlarged explanatory view of the left eye refractive power measuring unit of FIG. 7;

11 is an arrangement diagram of optical components when the optical system of FIG. 10 is viewed from the front side.

FIG. 12 is an enlarged explanatory diagram of the right eye refractive power measurement unit in FIG. 7;

13 is an arrangement diagram of optical components when the optical system of FIG. 12 is viewed from the front side.

FIG. 14 is a control circuit diagram of the eye-refractive-power measuring device shown in FIGS.

FIG. 15 is an explanatory diagram of a refractive power measurement in a far vision state of the eye refractive power measuring device shown in FIGS.

FIGS. 16 (a) and (b) are explanatory diagrams of a refractive power measurement by repeating the convergence and the far vision state of the eye refractive power measuring device shown in FIGS.

FIG. 17 is an explanatory diagram of an optical system showing a state where the eye refractive power measurement unit of FIGS. 1 to 13 is converged.

FIG. 18 is an explanatory diagram showing an example of image formation on a CCD in an eye refractive power measurement unit.

FIG. 19 is an explanatory diagram showing a display example of a liquid crystal display in the eye refractive power measurement unit.

FIG. 20 is a diagram showing an example of a message to the liquid crystal display at the time of coarse alignment.

FIG. 21 is a diagram showing another example of a message to the liquid crystal display during coarse alignment.

[Explanation of symbols]

12 joystick lever 12 (manual alignment means) 16L left eye refractive power measuring unit (optometric measuring unit) 16R right eye refractive power measuring unit (optometric measuring unit) 30l, 30R photographing optical system 53 liquid crystal display 46 ... CCD (imaging means) 64 ... Operation control circuit (judgment means)

Claims (7)

[Claims] An automatic alignment mechanism for automatically executing alignment of an optometric measurement unit with respect to an eye to be inspected;
An optometry apparatus comprising: a manual alignment unit configured to manually align an optometry measurement unit with an eye to be inspected; and a determination unit configured to determine whether automatic alignment can be performed. 2. The information processing apparatus according to claim 1, further comprising: a notifying unit for notifying the subject that the automatic alignment can be performed when it is determined that the automatic alignment can be performed. Optometry device. 3. A transmission means for transmitting to a subject that automatic alignment cannot be performed when it is determined that automatic alignment cannot be performed, and that it is necessary to perform rough alignment by manual operation. The optometry apparatus according to claim 1, wherein the optometry apparatus is provided. 4. When it is determined that automatic alignment can be executed based on manual operation of the optometry unit with respect to the eye to be inspected, the state is shifted from a state where automatic alignment cannot be executed to a state where automatic alignment can be executed. 4. An optometry apparatus according to claim 3, further comprising an informing means for informing the subject of the fact. 5. The apparatus according to claim 1, wherein said determination means is a sensing sensor provided on a forehead rest or a chin rest or a start button for starting a determination as to whether or not automatic alignment can be executed. The optometric apparatus according to claim 1. 6. The optometry apparatus according to claim 1, further comprising an informing means for explaining to the subject how the automatic alignment is performed. 7. When the subject owns the customer card, the alignment information is stored in the customer card, and the alignment information stored in the customer card is read by a card reader. 2. The optometry apparatus according to claim 1, wherein the optometry measurement unit is set to an initial position based on the following.